Final California 2026 Integrated Report (303(d) List/305(b) Report)
Supporting Information
Regional Board 4 - Los Angeles Region
Water Body Name:
Malibu Creek
Water Body ID:
CAR4042100019990201132825
Water Body Type:
River & Stream
DECISION ID
137526
Region 4
Malibu Creek
Pollutant:
Selenium
Final Listing Decision:
Do Not Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not Delist from 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Sources:
A Source Unknown
TMDL Priority:
Low
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for removal from the CWA section 303(d) List under section 4.1 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the CWA section 303(d) List.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 7 of 25, 23 of 53, 10 of 23 and 15 of 43 samples exceeded the CRITERIA and this exceeds the allowable frequency listed in Table 4.1 of the Listing Policy. 4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266072
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEM
Final California 2026 Integrated Report (303(d) List/305(b) Report)
Supporting Information
Regional Board 4 - Los Angeles Region
Water Body Name:
Malibu Creek
Water Body ID:
CAR4042100019990201132825
Water Body Type:
River & Stream
DECISION ID
137526
Region 4
Malibu Creek
Pollutant:
Selenium
Final Listing Decision:
Do Not Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not Delist from 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Sources:
A Source Unknown
TMDL Priority:
Low
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for removal from the CWA section 303(d) List under section 4.1 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the CWA section 303(d) List.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 7 of 25, 23 of 53, 10 of 23 and 15 of 43 samples exceeded the CRITERIA and this exceeds the allowable frequency listed in Table 4.1 of the Listing Policy. 4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266072
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266190
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
The samples were collected at 1 monitoring site: 404S35418 (Malibu Creek (35418)).
Temporal Representation:
The samples were collected between the dates of 2012-06-25 and 2012-06-25
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266190
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
252959
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
19
Number of Exceedances:
4
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 4 of 19 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
265751
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
252959
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
19
Number of Exceedances:
4
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 4 of 19 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
265751
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266367
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.
SWAMP Data:
SWAMP
Water Quality Objective/Criterion:
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266367
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266305
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266182
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
CCCCCC; PADDING-RIGHT: 2%; PADDING-LEFT: 0%; FONT-WEIGHT: bold; PADDING-BOTTOM: 3px; WIDTH: 100%; text-align: left; PADDING-TOP: 3px; font-smooth: always">Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266305
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266182
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
252935
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
19
Number of Exceedances:
8
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 8 of 19 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
SWAMP Data:
SWAMP
Water Quality Objective/Criterion:
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
252935
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
19
Number of Exceedances:
8
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 8 of 19 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266261
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266143
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266143
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
252932
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
19
Number of Exceedances:
4
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 4 of 19 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
252932
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
19
Number of Exceedances:
4
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 4 of 19 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266120
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
86327
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 2 samples exceed the criterion for Selenium, dissolved.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.005 mg/L (California Toxics Rule, 2000).
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
86327
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 2 samples exceed the criterion for Selenium, dissolved.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.005 mg/L (California Toxics Rule, 2000).
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The CTR for selenium is 5.0 ug/L.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
86315
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The CTR for selenium is 5.0 ug/L.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
86315
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 2 samples exceed the criterion for Selenium, dissolved.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.005 mg/L (California Toxics Rule, 2000).
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
2253
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
5
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Numeric data generated from 20 samples taken from 10/28/00 to 4/30/03 at one to two-week sampling interval. Five (5) samples exceeded the CTR continuous total selenium concentration criterion (LACDPW, 2004c).
CTR total selenium criterion for continuous concentration in water for the protection of aquatic life is 5.0 ug/L. The criterion is linked and applicable for the protection of aquatic life Beneficial Uses.
One sample site sampled during the dry and wet season beginning from 10/28/00 through 4/30/03 at approximately one to two week intervals.
Temporal Representation:
Twenty samples where taken during the wet and dry season from 10/12/00 to 4/30/03 at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions:
The Malibu Creek monitoring station is located at the existing stream gage station (Stream Gage No. F130-9-R) near Malibu Canyon Road, south of Piuma Road. At this location, the tributary watershed to Malibu Creek is 104.9 square miles. The entire Malibu Creek Watershed is 109.9 squaretr>
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 2 samples exceed the criterion for Selenium, dissolved.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.005 mg/L (California Toxics Rule, 2000).
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
2253
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
5
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Numeric data generated from 20 samples taken from 10/28/00 to 4/30/03 at one to two-week sampling interval. Five (5) samples exceeded the CTR continuous total selenium concentration criterion (LACDPW, 2004c).
CTR total selenium criterion for continuous concentration in water for the protection of aquatic life is 5.0 ug/L. The criterion is linked and applicable for the protection of aquatic life Beneficial Uses.
One sample site sampled during the dry and wet season beginning from 10/28/00 through 4/30/03 at approximately one to two week intervals.
Temporal Representation:
Twenty samples where taken during the wet and dry season from 10/12/00 to 4/30/03 at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions:
The Malibu Creek monitoring station is located at the existing stream gage station (Stream Gage No. F130-9-R) near Malibu Canyon Road, south of Piuma Road. At this location, the tributary watershed to Malibu Creek is 104.9 square miles. The entire Malibu Creek Watershed is 109.9 square miles.
QAPP Information:
Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266220
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266344
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Mali miles.
QAPP Information:
Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266220
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266344
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
265988
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
265988
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266325
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266205
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
Data Reference:
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266325
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266205
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
252884
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
19
Number of Exceedances:
8
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 8 of 19 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266241
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266081
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
ttps://www.waterboards.ca.gov/water_issues/programs/tmdl/records/state_board/2020/ref5228.xlsx">Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.
SWAMP Data:
SWAMP
Water Quality Objective/Criterion:
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
252884
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
19
Number of Exceedances:
8
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 8 of 19 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266241
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137526, Selenium
Region 4
Malibu Creek
LOE ID:
266081
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Do Not Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not Delist from 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Sources:
A Source Unknown
TMDL Priority:
Low
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for removal from the CWA section 303(d) List under section 4.2 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status.
11 lines of evidence are available in the administrative record to assess this pollutant. LOE IDs 2245 and 2246 for MUN from 2006 have been removed. This is a conditionally designated MUN* waterbody and cannot be assessed for MUN. The original data used in these LOEs is unavailable and they cannot be reassessed.
12 of the 13 samples exceed the objective for COLD. 7 of the 7 samples exceed the objective for WARM.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the CWA section 303(d) List.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 12 of the 13 and 7 of the 7 samples exceeded the objectives and this exceeds the allowable frequency listed in Table 4.2 of the Listing Policy. 4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137528, Sulfates
Region 4
Malibu Creek
LOE ID:
86349
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
2
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 2 of 2 samples exceed the criterion for Sulfate.
Do Not Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not Delist from 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Sources:
A Source Unknown
TMDL Priority:
Low
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for removal from the CWA section 303(d) List under section 4.2 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status.
11 lines of evidence are available in the administrative record to assess this pollutant. LOE IDs 2245 and 2246 for MUN from 2006 have been removed. This is a conditionally designated MUN* waterbody and cannot be assessed for MUN. The original data used in these LOEs is unavailable and they cannot be reassessed.
12 of the 13 samples exceed the objective for COLD. 7 of the 7 samples exceed the objective for WARM.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the CWA section 303(d) List.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 12 of the 13 and 7 of the 7 samples exceeded the objectives and this exceeds the allowable frequency listed in Table 4.2 of the Listing Policy. 4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137528, Sulfates
Region 4
Malibu Creek
LOE ID:
86349
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
2
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 2 of 2 samples exceed the criterion for Sulfate.
Table 3-8 of The Water Quality Control Plan for the Los Angeles Region specifies the Sulfate objective for the Malibu Creek within the Malibu Creek watershed as 500 mg/L.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137528, Sulfates
Region 4
Malibu Creek
LOE ID:
86348
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
2
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 2 of 2 samples exceed the criterion for Sulfate.
Table 3-8 of The Water Quality Control Plan for the Los Angeles Region specifies the Sulfate objective for the Malibu Creek within the Malibu Creek watershed as 500 mg/L.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137528, Sulfates
Region 4
Malibu Creek
LOE ID:
86351
Pollutant:
Sn="top" width="67%">Table 3-8 of The Water Quality Control Plan for the Los Angeles Region specifies the Sulfate objective for the Malibu Creek within the Malibu Creek watershed as 500 mg/L.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137528, Sulfates
Region 4
Malibu Creek
LOE ID:
86348
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
2
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 2 of 2 samples exceed the criterion for Sulfate.
Table 3-8 of The Water Quality Control Plan for the Los Angeles Region specifies the Sulfate objective for the Malibu Creek within the Malibu Creek watershed as 500 mg/L.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
The sample was collected from the Malibu Creek Random Site 104 station (404BA0104).
Temporal Representation:
The sample was collected on 6/18/2008.
Environmental Conditions:
QAPP Information:
SWAMP QAPP
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137528, Sulfates
Region 4
Malibu Creek
LOE ID:
244029
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
Line of Evidence (LOE) for Decision ID 137528, Sulfates
Region 4
Malibu Creek
LOE ID:
244169
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
Line of Evidence (LOE) for Decision ID 137528, Sulfates
Region 4
Malibu Creek
LOE ID:
244169
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
Line of Evidence (LOE) for Decision ID 137528, Sulfates
Region 4
Malibu Creek
LOE ID:
244096
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
Line of Evidence (LOE) for Decision ID 137528, Sulfates
Region 4
Malibu Creek
LOE ID:
244096
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
Line of Evidence (LOE) for Decision ID 137528, Sulfates
Region 4
Malibu Creek
LOE ID:
243965
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
8
Number of Exceedances:
7
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Los Angeles County MS4 Permit to determine beneficial use support. The results are as follows: 7 out of 8 samples exceed the criterion for Sulfate.
Station S02 (34.07611, -118.702206), located in Malibu Creek @ Piuma Road mass emission station.
Temporal Representation:
The water samples were taken between 8/31/2015 - 2/20/2019, per the monitoring requirements listed in the Los Angeles County Municipal Separate Storm Sewer Permit.
Environmental Conditions:
QAPP Information:
The work was performed in accordance with the provisions of the Los Angeles Municipal Separate Storm Sewer System quality control and quality assurance procedures listed in coordinated integrated monitoring plan.
Line of Evidence (LOE) for Decision ID 137528, Sulfates
Region 4
Malibu Creek
LOE ID:
244028
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
Line of Evidence (LOE) for Decision ID 137528, Sulfates
Region 4
Malibu Creek
LOE ID:
244168
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
Line of Evidence (LOE) for Decision ID 137528, Sulfates
Region 4
Malibu Creek
LOE ID:
244077
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
Water Board staff assessed data from the Los Angeles County MS4 Permit to determine beneficial use support. The results are as follows: 7 out of 8 samples exceed the criterion for Sulfate.
Station S02 (34.07611, -118.702206), located in Malibu Creek @ Piuma Road mass emission station.
Temporal Representation:
The water samples were taken between 8/31/2015 - 2/20/2019, per the monitoring requirements listed in the Los Angeles County Municipal Separate Storm Sewer Permit.
Environmental Conditions:
QAPP Information:
The work was performed in accordance with the provisions of the Los Angeles Municipal Separate Storm Sewer System quality control and quality assurance procedures listed in coordinated integrated monitoring plan.
Line of Evidence (LOE) for Decision ID 137528, Sulfates
Region 4
Malibu Creek
LOE ID:
244028
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
Line of Evidence (LOE) for Decision ID 137528, Sulfates
Region 4
Malibu Creek
LOE ID:
244168
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
Line of Evidence (LOE) for Decision ID 137528, Sulfates
Region 4
Malibu Creek
LOE ID:
244077
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
Do Not Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Sources:
A Source Unknown
TMDL Priority:
Low
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for removal from the CWA section 303(d) List under section 4.1 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the CWA section 303(d) List.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 5 of 29 samples exhibit water toxicity and this exceeds the allowable frequency listed in Table 4.1 of the Listing Policy. 4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
244390
Pollutant:
Toxicity
LOE Subgroup:
Toxicity
Matrix:
Sediment
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
TOXICITY TESTING
Data Used to Assess Water Quality:
0 of the 1 samples collected by RWB4 So. CA Stormwater Monitoring Coalition for Malibu Creek exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca for Survival, Hyalella azteca for Growth (wt/surv indiv).
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated.
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
244494
Pollutant:
Toxicity
LOE Subgroup:
Toxicity
Matrix:
Sediment
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
TOXICITY TESTING
Data Used to Assess Water Quality:
0 of the 1 samples collected by RWB4 So. CA Stormwater Monitoring Coalition for Malibu Creek exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca for Survival, Hyalella azteca for Growth (wt/surv indiv).
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated.
The samples were collected at monitoring site: 404S32468 ( Malibu Creek (32468) ).
Temporal Representation:
DECISION ID
137532
Region 4
Malibu Creek
Pollutant:
Toxicity
Final Listing Decision:
Do Not Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Sources:
A Source Unknown
TMDL Priority:
Low
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for removal from the CWA section 303(d) List under section 4.1 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the CWA section 303(d) List.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 5 of 29 samples exhibit water toxicity and this exceeds the allowable frequency listed in Table 4.1 of the Listing Policy. 4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
244390
Pollutant:
Toxicity
LOE Subgroup:
Toxicity
Matrix:
Sediment
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
TOXICITY TESTING
Data Used to Assess Water Quality:
0 of the 1 samples collected by RWB4 So. CA Stormwater Monitoring Coalition for Malibu Creek exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca for Survival, Hyalella azteca for Growth (wt/surv indiv).
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated.
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
244494
Pollutant:
Toxicity
LOE Subgroup:
Toxicity
Matrix:
Sediment
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
TOXICITY TESTING
Data Used to Assess Water Quality:
0 of the 1 samples collected by RWB4 So. CA Stormwater Monitoring Coalition for Malibu Creek exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca for Survival, Hyalella azteca for Growth (wt/surv indiv).
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated.
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The chronic toxicity of the effluent is expressed and reported in Chronic Toxic Units, where,TUc = 100/NOEC or LC50 or EC50, as determined by the results of a critical lifestage toxicity. Toxicity is usually defined as the statistically significant difference from control using a t-test or other valid statistical tests. Since these toxicity data were submitted without a control, toxicity was determined as any sample where the TU was greater than 1.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 14 and 28, not No. 12 and 28. Please change the Temporal Representation to Samples were collected in 2009-2010 from dry weather events No. 14 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
Samples from two storm events(including the first storm of each year) and two dry weather events every year. Water are near an estuary so could be considered fresh or saline. Both types of species were used to test toxicity.
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
valign="top" width="67%">The samples were collected between the dates of 2012-06-26 and 2012-06-26.
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The chronic toxicity of the effluent is expressed and reported in Chronic Toxic Units, where,TUc = 100/NOEC or LC50 or EC50, as determined by the results of a critical lifestage toxicity. Toxicity is usually defined as the statistically significant difference from control using a t-test or other valid statistical tests. Since these toxicity data were submitted without a control, toxicity was determined as any sample where the TU was greater than 1.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 14 and 28, not No. 12 and 28. Please change the Temporal Representation to Samples were collected in 2009-2010 from dry weather events No. 14 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
Samples from two storm events(including the first storm of each year) and two dry weather events every year. Water are near an estuary so could be considered fresh or saline. Both types of species were used to test toxicity.
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
86386
Pollutant:
Toxicity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
13
Number of Exceedances:
3
Data and Information Type:
Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality:
Three of the thirteen Chronic Sea Urchin (Strongylocentrotus purpuratus) fertilization tests were reported with TU >1. Three of the samples had TU reported as <2, these samples were not used in the assessment because it is not known if the sample was toxic.
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The chronic toxicity of the effluent is expressed and reported in Chronic Toxic Units, where,TUc = 100/NOEC or LC50 or EC50, as determined by the results of a critical lifestage toxicity. Toxicity is usually defined as the statistically significant difference from control using a t-test or other valid statistical tests. Since these toxicity data were submitted without a control, toxicity was determined as any sample where the TU was greater than 1.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
Samples from two storm events(including the first storm of each year) and two dry weather events every year. Water are near an estuary so could be considered fresh or saline. Both types of species were used to test toxicity.
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
27829
Pollutant:
Toxicity
LOE Subgroup:
Toxicity
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Aquatic Life Use:
Fish Spawning | Preservation of Rare & Endangered Species | Wetland Habitat | Wildlife Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
TOXICITY TESTING
Data Used to Assess Water Quality:
Zero of one sample exhibited significant toxicity to Pimephales promelas and Ceriodaphnia dubia. A sample was taken and test on Pimephales promelas and Ceriodaphnia dubia for acute and chronic toxicity.
LOE ID:
86386
Pollutant:
Toxicity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
13
Number of Exceedances:
3
Data and Information Type:
Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality:
Three of the thirteen Chronic Sea Urchin (Strongylocentrotus purpuratus) fertilization tests were reported with TU >1. Three of the samples had TU reported as <2, these samples were not used in the assessment because it is not known if the sample was toxic.
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The chronic toxicity of the effluent is expressed and reported in Chronic Toxic Units, where,TUc = 100/NOEC or LC50 or EC50, as determined by the results of a critical lifestage toxicity. Toxicity is usually defined as the statistically significant difference from control using a t-test or other valid statistical tests. Since these toxicity data were submitted without a control, toxicity was determined as any sample where the TU was greater than 1.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
Samples from two storm events(including the first storm of each year) and two dry weather events every year. Water are near an estuary so could be considered fresh or saline. Both types of species were used to test toxicity.
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
27829
Pollutant:
Toxicity
LOE Subgroup:
Toxicity
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Aquatic Life Use:
Fish Spawning | Preservation of Rare & Endangered Species | Wetland Habitat | Wildlife Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
TOXICITY TESTING
Data Used to Assess Water Quality:
Zero of one sample exhibited significant toxicity to Pimephales promelas and Ceriodaphnia dubia. A sample was taken and test on Pimephales promelas and Ceriodaphnia dubia for acute and chronic toxicity.
Toxicity was defined as a statistically significant effect in the sample exposure compared to the control using EPA recommended hypothesis testing (parametric Dunnett's Test or non-parametric Fisher's Exact Test).
Samples were taken in the Malibu Creek at monitoring station, 404SMB061 (Lat 34.04255, Long -118.68431).
Temporal Representation:
Samples were taken on 03/12/03 as part of the Surface Water Ambient Monitoring Program (SWAMP)
Environmental Conditions:
QAPP Information:
Data was collected in compliance with the sampling and monitoring procedures detailed in State of California's Surface Water Ambient Monitoring Program Quality Assurance Management Plan.
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
86387
Pollutant:
Toxicity
LOE Subgroup:
Toxicity
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
1
Data and Information Type:
TOXICITY TESTING
Data Used to Assess Water Quality:
Two samples were collected to evaluate water toxicity and one of the samplea exhibited significant toxicity. The toxicity test included survival and reproduction of Ceriodaphnia dubia. One sample can have multiple toxicity test results but will be counted only once. One sample is defined as being collected on the same day at the same location with the same lab sample id (if provided).
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life. Region 4 Basin Plan.
Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. For SWAMP data exceedances are counted with the significant effect code SL. SL is defined as the result being significant compared to the negative control based on a statistical test, less than stated the alpha level, AND less than the evaluation threshold.
Toxicity was defined as a statistically significant effect in the sample exposure compared to the control using EPA recommended hypothesis testing (parametric Dunnett's Test or non-parametric Fisher's Exact Test).
Samples were taken in the Malibu Creek at monitoring station, 404SMB061 (Lat 34.04255, Long -118.68431).
Temporal Representation:
Samples were taken on 03/12/03 as part of the Surface Water Ambient Monitoring Program (SWAMP)
Environmental Conditions:
QAPP Information:
Data was collected in compliance with the sampling and monitoring procedures detailed in State of California's Surface Water Ambient Monitoring Program Quality Assurance Management Plan.
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
86387
Pollutant:
Toxicity
LOE Subgroup:
Toxicity
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
1
Data and Information Type:
TOXICITY TESTING
Data Used to Assess Water Quality:
Two samples were collected to evaluate water toxicity and one of the samplea exhibited significant toxicity. The toxicity test included survival and reproduction of Ceriodaphnia dubia. One sample can have multiple toxicity test results but will be counted only once. One sample is defined as being collected on the same day at the same location with the same lab sample id (if provided).
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life. Region 4 Basin Plan.
Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. For SWAMP data exceedances are counted with the significant effect code SL. SL is defined as the result being significant compared to the negative control based on a statistical test, less than stated the alpha level, AND less than the evaluation threshold.
The sample was collected at stations 404BA0104 and 404S11406.
Temporal Representation:
The sample was collected in June 2008 and May 2009.
Environmental Conditions:
QAPP Information:
Data quality is good. Data results were recorded in the SWAMP database and follwed SWAMP protocols.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
244346
Pollutant:
Toxicity
LOE Subgroup:
Toxicity
Matrix:
Sediment
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
TOXICITY TESTING
Data Used to Assess Water Quality:
0 of the 1 samples collected by RWB4 So. CA Stormwater Monitoring Coalition for Malibu Creek exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca for Survival, Hyalella azteca for Growth (wt/surv indiv).
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated.
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
244488
Pollutant:
Temporal Representation:
The sample was collected in June 2008 and May 2009.
Environmental Conditions:
QAPP Information:
Data quality is good. Data results were recorded in the SWAMP database and follwed SWAMP protocols.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
244346
Pollutant:
Toxicity
LOE Subgroup:
Toxicity
Matrix:
Sediment
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
TOXICITY TESTING
Data Used to Assess Water Quality:
0 of the 1 samples collected by RWB4 So. CA Stormwater Monitoring Coalition for Malibu Creek exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca for Survival, Hyalella azteca for Growth (wt/surv indiv).
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated.
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
244488
Pollutant:
Toxicity
LOE Subgroup:
Toxicity
Matrix:
Sediment
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
TOXICITY TESTING
Data Used to Assess Water Quality:
0 of the 1 samples collected by RWB4 So. CA Stormwater Monitoring Coalition for Malibu Creek exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca for Growth (wt/surv indiv), Hyalella azteca for Survival.
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated.
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
244476
Pollutant:
Toxicity
LOE Subgroup:
Toxicity
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
TOXICITY TESTING
Data Used to Assess Water Quality:
1 of the 1 samples collected by RWB4 So. CA Stormwater Monitoring Coalition for Malibu Creek exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Ceriodaphnia dubia for Young/female, Ceriodaphnia dubia for Survival. The following tests exhibited toxicity: Ceriodaphnia dubia for Young/female on 2012-06-20.
0 of the 1 samples collected by RWB4 So. CA Stormwater Monitoring Coalition for Malibu Creek exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca for Growth (wt/surv indiv), Hyalella azteca for Survival.
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated.
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
244476
Pollutant:
Toxicity
LOE Subgroup:
Toxicity
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
TOXICITY TESTING
Data Used to Assess Water Quality:
1 of the 1 samples collected by RWB4 So. CA Stormwater Monitoring Coalition for Malibu Creek exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Ceriodaphnia dubia for Young/female, Ceriodaphnia dubia for Survival. The following tests exhibited toxicity: Ceriodaphnia dubia for Young/female on 2012-06-20.
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated.
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
244477
Pollutant:
Toxicity
LOE Subgroup:
Toxicity
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
TOXICITY TESTING
Data Used to Assess Water Quality:
1 of the 1 samples collected by RWB4 So. CA Stormwater Monitoring Coalition for Malibu Creek exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Ceriodaphnia dubia for Young/female, Ceriodaphnia dubia for Survival. The following tests exhibited toxicity: Ceriodaphnia dubia for Young/female on 2012-06-20.
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated.
Guideline Reference:
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.
SWAMP Data:
SWAMP
Water Quality Objective/Criterion:
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated.
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
244477
Pollutant:
Toxicity
LOE Subgroup:
Toxicity
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
TOXICITY TESTING
Data Used to Assess Water Quality:
1 of the 1 samples collected by RWB4 So. CA Stormwater Monitoring Coalition for Malibu Creek exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Ceriodaphnia dubia for Young/female, Ceriodaphnia dubia for Survival. The following tests exhibited toxicity: Ceriodaphnia dubia for Young/female on 2012-06-20.
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated.
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
244547
Pollutant:
Toxicity
LOE Subgroup:
Toxicity
Matrix:
Sediment
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
TOXICITY TESTING
Data Used to Assess Water Quality:
0 of the 1 samples collected by RWB4 So. CA Stormwater Monitoring Coalition for Malibu Creek exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca for Survival, Hyalella azteca for Growth (wt/surv indiv).
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated.
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
244547
Pollutant:
Toxicity
LOE Subgroup:
Toxicity
Matrix:
Sediment
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
TOXICITY TESTING
Data Used to Assess Water Quality:
0 of the 1 samples collected by RWB4 So. CA Stormwater Monitoring Coalition for Malibu Creek exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca for Survival, Hyalella azteca for Growth (wt/surv indiv).
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated.
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
244478
Pollutant:
Toxicity
LOE Subgroup:
Toxicity
Matrix:
Sediment
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
TOXICITY TESTING
Data Used to Assess Water Quality:
0 of the 1 samples collected by RWB4 So. CA Stormwater Monitoring Coalition for Malibu Creek exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca for Growth (wt/surv indiv), Hyalella azteca for Survival.
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated.
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
244378
Pollutant:
Toxicity
LOE Subgroup:
Toxicity
Matrix:
Sediment
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
244478
Pollutant:
Toxicity
LOE Subgroup:
Toxicity
Matrix:
Sediment
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
TOXICITY TESTING
Data Used to Assess Water Quality:
0 of the 1 samples collected by RWB4 So. CA Stormwater Monitoring Coalition for Malibu Creek exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca for Growth (wt/surv indiv), Hyalella azteca for Survival.
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated.
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
244378
Pollutant:
Toxicity
LOE Subgroup:
Toxicity
Matrix:
Sediment
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
TOXICITY TESTING
Data Used to Assess Water Quality:
0 of the 1 samples collected by RWB4 So. CA Stormwater Monitoring Coalition for Malibu Creek exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca for Survival, Hyalella azteca for Growth (wt/surv indiv).
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated.
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
244404
Pollutant:
Toxicity
LOE Subgroup:
Toxicity
Matrix:
Sediment
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
TOXICITY TESTING
Data Used to Assess Water Quality:
0 of the 1 samples collected by RWB4 So. CA Stormwater Monitoring Coalition for Malibu Creek exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca for Survival, Hyalella azteca for Growth (wt/surv indiv).
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated.
0 of the 1 samples collected by RWB4 So. CA Stormwater Monitoring Coalition for Malibu Creek exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca for Survival, Hyalella azteca for Growth (wt/surv indiv).
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated.
Line of Evidence (LOE) for Decision ID 137532, Toxicity
Region 4
Malibu Creek
LOE ID:
244404
Pollutant:
Toxicity
LOE Subgroup:
Toxicity
Matrix:
Sediment
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
TOXICITY TESTING
Data Used to Assess Water Quality:
0 of the 1 samples collected by RWB4 So. CA Stormwater Monitoring Coalition for Malibu Creek exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca for Survival, Hyalella azteca for Growth (wt/surv indiv).
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated.
Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:
Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)(2024)
Revision Status
Revised
Sources:
A Source Unknown
TMDL Name:
Malibu Lagoon Benthic Comm. Effects (71)
TMDL Project Code:
409
Date TMDL Approved by USEPA:
07/02/2013
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for removal from the CWA section 303(d) List under sections 2.2 and 4.9 of the Listing Policy. Under section 4.9, waters are listed when a bioassessment shows diminished numbers of species or other metrics (compared to a reference site) and this condition is associated with another pollutant.
Five Benthic-Macroinvertebrate Bioassessments lines of evidence are available to assess this pollutant. 7 of 7 samples show evidence of benthic community impairment using the Index of Biological Integrity 4 of 5 samples show evidence of benthic community impairment using the California Stream Condition Index
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the CWA section 303(d) List. There is sufficient justification to place it in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Seven of 7 IBI and 4 of 5 CSCI samples showed evidence of biological community impairment. Additionally, this water body is listed as being impaired due to multiple pollutants, including cyanide; selenium; toxicity; nitrogen, nitrate; aluminum, sulfates, dissolved oxygen, and sedimentation/siltation. 4. The Malibu Creek and Lagoon TMDL for Sedimentation and Nutrients to Address Benthic Community Impairments was approved by USEPA on 07/02/2013. 5. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
Listing Extent:
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
244096
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data
DECISION ID
172215
Region 4
Malibu Creek
Pollutant:
Benthic Community Effects
Final Listing Decision:
Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:
Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)(2024)
Revision Status
Revised
Sources:
A Source Unknown
TMDL Name:
Malibu Lagoon Benthic Comm. Effects (71)
TMDL Project Code:
409
Date TMDL Approved by USEPA:
07/02/2013
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for removal from the CWA section 303(d) List under sections 2.2 and 4.9 of the Listing Policy. Under section 4.9, waters are listed when a bioassessment shows diminished numbers of species or other metrics (compared to a reference site) and this condition is associated with another pollutant.
Five Benthic-Macroinvertebrate Bioassessments lines of evidence are available to assess this pollutant. 7 of 7 samples show evidence of benthic community impairment using the Index of Biological Integrity 4 of 5 samples show evidence of benthic community impairment using the California Stream Condition Index
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the CWA section 303(d) List. There is sufficient justification to place it in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Seven of 7 IBI and 4 of 5 CSCI samples showed evidence of biological community impairment. Additionally, this water body is listed as being impaired due to multiple pollutants, including cyanide; selenium; toxicity; nitrogen, nitrate; aluminum, sulfates, dissolved oxygen, and sedimentation/siltation. 4. The Malibu Creek and Lagoon TMDL for Sedimentation and Nutrients to Address Benthic Community Impairments was approved by USEPA on 07/02/2013. 5. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
Listing Extent:
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
244096
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
307798
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
307798
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
308482
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
9
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 9 of 16 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
308395
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
308482
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
9
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 9 of 16 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
308395
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
307797
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
SWAMP Data:
SWAMP
Water Quality Objective/Criterion:
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
307797
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
307815
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
308454
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be de3px; font-smooth: always">Region 4
Malibu Creek
LOE ID:
307815
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
308454
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
308430
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
5
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 5 of 16 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
308430
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
5
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 5 of 16 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
308469
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
314949
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions develtant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
314949
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
315092
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
315092
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
314959
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
252328
Pollutant:
Cyanide
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
2
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 2 of 2 samples exceeded the water quality threshold for Cyanide.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
252328
Pollutant:
Cyanide
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
2
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 2 of 2 samples exceeded the water quality threshold for Cyanide.
The cyanide criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5.2 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
252373
Pollutant:
Cyanide
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
2
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 2 of 2 samples exceeded the water quality threshold for Cyanide.
The cyanide criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5.2 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
SWAMP Data:
Non-SWAMP
Water Quality Objective/Criterion:
The cyanide criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5.2 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
252373
Pollutant:
Cyanide
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
2
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 2 of 2 samples exceeded the water quality threshold for Cyanide.
The cyanide criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5.2 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
252959
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
19
Number of Exceedances:
4
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 4 of 19 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266241
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 4 of 19 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266241
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266325
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266325
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
252884
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
19
Number of Exceedances:
8
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 8 of 19 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266205
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
The samples were collected at 1 monit>LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
19
Number of Exceedances:
8
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 8 of 19 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266205
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266190
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266190
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
302323
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
14
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 14 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
302382
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
14
Number of Exceedances:
6
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 6 of 14 samples exceeded the water quality threshold for Nitrate as N.
The samples were collected at 1 monitoring site: WQ_MC_TAPIA (Malibu Creek Tapia).
Temporal Representation:
The samples were collected between the dates of 2017-08-23 and 2019-03-05
Environmental Conditions:
QAPP Information:
Los Angeles Regional Water Quality Control Board. 2016. Coordinated Integrated Monitoring Program for Malibu Creek Watershed.
<7%">Cold Freshwater Habitat
Number of Samples:
14
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 14 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
302382
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
14
Number of Exceedances:
6
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 6 of 14 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
302332
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
14
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 14 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
302266
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
14
Number of Exceedances:
6
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 6 of 14 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
302332
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
14
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 14 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
302266
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
14
Number of Exceedances:
6
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 6 of 14 samples exceeded the water quality threshold for Nitrate as N.
All waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce significant alterations in population or community ecology or receiving water biota. In addition, the health and life history characteristics of aquatic organisms in waters affected by controllable water quality factors shall not differ significantly from those for the same waters in areas unaffected by controllable water quality factors.
The California Stream Condition Index (CSCI) is a biological scoring tool that helps aquatic resource managers translate complex data about benthic macroinvertebrates found living in a stream into an overall measure of stream health. The CSCI score is calculated by comparing the expected condition with actual (observed) results (Rhen, A.C. et al., 2015). CSCI scores range from 0 (highly degraded) to greater than 1 (equivalent to reference). CSCI scoring of biological condition are as follows (per the scientific paper supporting the development of the CSCI scoring tool): greater than or equal to 0.92 = likely intact condition, 0.91 to 0.80 = possibly altered condition, 0.79 to 0.63 = likely altered condition, less than or equal to 0.62 = very likely altered condition. Sites with scores below 0.79 are considered to have exceeded the water quality objective for the aquatic life beneficial use.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
86361
Pollutant:
Benthic-Macroinvertebrate Bioassessments
LOE Subgroup:
Population/Community Degradation
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
7
Number of Exceedances:
7
Data and Information Type:
Benthic macroinvertebrate surveys
Data Used to Assess Water Quality:
The seven samples collected had IBI scores below 40. The samples were collected at three different sites. The scores were, 26 (fall 2006), 21 (spring 2008), and 30 (spring 2009) for site MC1; 17 (fall 2006) and 17 (spring 2009) for site MC12; and 17 (fall 2006) and 19 (spring 2009) for site MC15.
All waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce significant alterations in population or community ecology or receiving water biota. In addition, the health and life history characteristics of aquatic organisms in waters affected by controllable water quality factors shall not differ significantly from those for the same waters in areas unaffected by controllable water quality factors.
The California Stream Condition Index (CSCI) is a biological scoring tool that helps aquatic resource managers translate complex data about benthic macroinvertebrates found living in a stream into an overall measure of stream health. The CSCI score is calculated by comparing the expected condition with actual (observed) results (Rhen, A.C. et al., 2015). CSCI scores range from 0 (highly degraded) to greater than 1 (equivalent to reference). CSCI scoring of biological condition are as follows (per the scientific paper supporting the development of the CSCI scoring tool): greater than or equal to 0.92 = likely intact condition, 0.91 to 0.80 = possibly altered condition, 0.79 to 0.63 = likely altered condition, less than or equal to 0.62 = very likely altered condition. Sites with scores below 0.79 are considered to have exceeded the water quality objective for the aquatic life beneficial use.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
86361
Pollutant:
Benthic-Macroinvertebrate Bioassessments
LOE Subgroup:
Population/Community Degradation
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
7
Number of Exceedances:
7
Data and Information Type:
Benthic macroinvertebrate surveys
Data Used to Assess Water Quality:
The seven samples collected had IBI scores below 40. The samples were collected at three different sites. The scores were, 26 (fall 2006), 21 (spring 2008), and 30 (spring 2009) for site MC1; 17 (fall 2006) and 17 (spring 2009) for site MC12; and 17 (fall 2006) and 19 (spring 2009) for site MC15.
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant or animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analysis of species diversity, population density, growth anomalies, bioassays of appropriate duration or other appropriate methods as specified by the State or Regional Board. Region 4 Basin Plan.
The IBI is a multi-metric assessment that employs biological metrics that respond to a habitat or water quality impairment. Each of the biological metrics measured at a site are converted to an IBI score then summed. These cumulative scores are then ranked. For the Southern California IBI, sites with scores below 40 are considered to have impaired conditions.
Samples were collected at station MC1 Malibu Creek, Cross Creek Rd., MC12 Malibu Creek, Malibu Creek State Park Down Stream of Rock Pool, and MC15 Malibu Creek, Malibu Canyon Rd.
Temporal Representation:
The samples were collected in the fall 2006, and the spring of 2008 and 2009.
Environmental Conditions:
QAPP Information:
Data was collected in compliance with California Stream Bioassessment Procedure. Collection procedures were audited by California Department of Fish and Game in 2006.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
86315
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 2 samples exceed the criterion for Selenium, dissolved.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.005 mg/L (California Toxics Rule, 2000).
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant or animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analysis of species diversity, population density, growth anomalies, bioassays of appropriate duration or other appropriate methods as specified by the State or Regional Board. Region 4 Basin Plan.
The IBI is a multi-metric assessment that employs biological metrics that respond to a habitat or water quality impairment. Each of the biological metrics measured at a site are converted to an IBI score then summed. These cumulative scores are then ranked. For the Southern California IBI, sites with scores below 40 are considered to have impaired conditions.
Samples were collected at station MC1 Malibu Creek, Cross Creek Rd., MC12 Malibu Creek, Malibu Creek State Park Down Stream of Rock Pool, and MC15 Malibu Creek, Malibu Canyon Rd.
Temporal Representation:
The samples were collected in the fall 2006, and the spring of 2008 and 2009.
Environmental Conditions:
QAPP Information:
Data was collected in compliance with California Stream Bioassessment Procedure. Collection procedures were audited by California Department of Fish and Game in 2006.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
86315
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 2 samples exceed the criterion for Selenium, dissolved.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.005 mg/L (California Toxics Rule, 2000).
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The CTR for selenium is 5.0 ug/L.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
2253
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
5
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Numeric data generated from 20 samples taken from 10/28/00 to 4/30/03 at one to two-week sampling interval. Five (5) samples exceeded the CTR continuous total selenium concentration criterion (LACDPW, 2004c).
California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The CTR for selenium is 5.0 ug/L.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
2253
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
5
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Numeric data generated from 20 samples taken from 10/28/00 to 4/30/03 at one to two-week sampling interval. Five (5) samples exceeded the CTR continuous total selenium concentration criterion (LACDPW, 2004c).
CTR total selenium criterion for continuous concentration in water for the protection of aquatic life is 5.0 ug/L. The criterion is linked and applicable for the protection of aquatic life Beneficial Uses.
One sample site sampled during the dry and wet season beginning from 10/28/00 through 4/30/03 at approximately one to two week intervals.
Temporal Representation:
Twenty samples where taken during the wet and dry season from 10/12/00 to 4/30/03 at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions:
The Malibu Creek monitoring station is located at the existing stream gage station (Stream Gage No. F130-9-R) near Malibu Canyon Road, south of Piuma Road. At this location, the tributary watershed to Malibu Creek is 104.9 square miles. The entire Malibu Creek Watershed is 109.9 square miles.
QAPP Information:
Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
86386
Pollutant:
Toxicity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
13
Number of Exceedances:
3
Data and Information Type:
Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality:
Three of the thirteen Chronic Sea Urchin (Strongylocentrotus purpuratus) fertilization tests were reported with TU >1. Three of the samples had TU reported as <2, these samples were not used in the assessment because it is not known if the sample was toxic.
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The chronic toxicity of the effluent is expressed and reported in Chronic Toxic Units, where,TUc = 100/NOEC or LC50 or EC50, as determined by the results of a critical lifestage toxicity. Toxicity is usually defined as the statistically significant difference from control using a t-test or other valid statistical tests. Since these toxicity data were submitted without a control, toxicity was determined as any sample where the TU was greater than 1.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
SWAMP Data:
Non-SWAMP
Water Quality Objective/Criterion:
CTR total selenium criterion for continuous concentration in water for the protection of aquatic life is 5.0 ug/L. The criterion is linked and applicable for the protection of aquatic life Beneficial Uses.
One sample site sampled during the dry and wet season beginning from 10/28/00 through 4/30/03 at approximately one to two week intervals.
Temporal Representation:
Twenty samples where taken during the wet and dry season from 10/12/00 to 4/30/03 at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions:
The Malibu Creek monitoring station is located at the existing stream gage station (Stream Gage No. F130-9-R) near Malibu Canyon Road, south of Piuma Road. At this location, the tributary watershed to Malibu Creek is 104.9 square miles. The entire Malibu Creek Watershed is 109.9 square miles.
QAPP Information:
Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
86386
Pollutant:
Toxicity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
13
Number of Exceedances:
3
Data and Information Type:
Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality:
Three of the thirteen Chronic Sea Urchin (Strongylocentrotus purpuratus) fertilization tests were reported with TU >1. Three of the samples had TU reported as <2, these samples were not used in the assessment because it is not known if the sample was toxic.
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The chronic toxicity of the effluent is expressed and reported in Chronic Toxic Units, where,TUc = 100/NOEC or LC50 or EC50, as determined by the results of a critical lifestage toxicity. Toxicity is usually defined as the statistically significant difference from control using a t-test or other valid statistical tests. Since these toxicity data were submitted without a control, toxicity was determined as any sample where the TU was greater than 1.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
Samples from two storm events(including the first storm of each year) and two dry weather events every year. Water are near an estuary so could be considered fresh or saline. Both types of species were used to test toxicity.
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
86385
Pollutant:
Toxicity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
2
Data and Information Type:
Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality:
Two of the sixteen of the Ceriodaphnia dubia (water flea) 7-day survival/reproduction were reported with TU >1.
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The chronic toxicity of the effluent is expressed and reported in Chronic Toxic Units, where,TUc = 100/NOEC or LC50 or EC50, as determined by the results of a critical lifestage toxicity. Toxicity is usually defined as the statistically significant difference from control using a t-test or other valid statistical tests. Since these toxicity data were submitted without a control, toxicity was determined as any sample where the TU was greater than 1.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 14 and 28, not No. 12 and 28. Please change the Temporal Representation to Samples were collected in 2009-2010 from dry weather events No. 14 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
Samples from two storm events(including the first storm of each year) and two dry weather events every year. Water are near an estuary so could be considered fresh or saline. Both types of species were used to test toxicity.
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
305250
Pollutant:
Benthic-Macroinvertebrate Bioassessments
LOE Subgroup:
Population/Community Degradation
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
Benthic macroinvertebrate surveys
Data Used to Assess Water Quality:
Water Board staff assessed data for 404S16168 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.615978568 to 0.615978568.
All waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce significant alterations in population or community ecology or receiving water biota. In addition, the health and life history characteristics of aquatic organisms in waters affected by controllable water quality factors shall not differ significantly from those for the same waters in areas unaffected by controllable water quality factors.
The California Stream Condition Index (CSCI) is a biological scoring tool that helps aquatic resource managers translate complex data about benthic macroinvertebrates found living in a stream into an overall measure of stream health. The CSCI score is calculated by comparing the expected condition with actual (observed) results (Rehn, A.C. et al., 2015). CSCI scores range from 0 (highly degraded) to greater than 1 (equivalent to reference). CSCI scoring of biological condition are as follows (per the scientific paper supporting the development of the CSCI scoring tool): greater than or equal to 0.92 = likely intact condition, 0.91 to 0.80 = possibly altered condition, 0.79 to 0.63 = likely altered condition, less than or equal to 0.62 = very likely altered condition. Sites with scores below 0.79 are considered to have exceeded the water quality objective for the aquatic life beneficial use.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
305228
Pollutant:
Benthic-Macroinvertebrate Bioassessments
LOE Subgroup:
Population/Community Degradation
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
Benthic macroinvertebrate surveys
Data Used to Assess Water Quality:
Water Board staff assessed data for 404S13672 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.766763245 to 0.766763245.
Samples from two storm events(including the first storm of each year) and two dry weather events every year. Water are near an estuary so could be considered fresh or saline. Both types of species were used to test toxicity.
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
86385
Pollutant:
Toxicity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
2
Data and Information Type:
Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality:
Two of the sixteen of the Ceriodaphnia dubia (water flea) 7-day survival/reproduction were reported with TU >1.
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
The chronic toxicity of the effluent is expressed and reported in Chronic Toxic Units, where,TUc = 100/NOEC or LC50 or EC50, as determined by the results of a critical lifestage toxicity. Toxicity is usually defined as the statistically significant difference from control using a t-test or other valid statistical tests. Since these toxicity data were submitted without a control, toxicity was determined as any sample where the TU was greater than 1.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 14 and 28, not No. 12 and 28. Please change the Temporal Representation to Samples were collected in 2009-2010 from dry weather events No. 14 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
Samples from two storm events(including the first storm of each year) and two dry weather events every year. Water are near an estuary so could be considered fresh or saline. Both types of species were used to test toxicity.
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
305250
Pollutant:
Benthic-Macroinvertebrate Bioassessments
LOE Subgroup:
Population/Community Degradation
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
Benthic macroinvertebrate surveys
Data Used to Assess Water Quality:
Water Board staff assessed data for 404S16168 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.615978568 to 0.615978568.
All waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce significant alterations in population or community ecology or receiving water biota. In addition, the health and life history characteristics of aquatic organisms in waters affected by controllable water quality factors shall not differ significantly from those for the same waters in areas unaffected by controllable water quality factors.
The California Stream Condition Index (CSCI) is a biological scoring tool that helps aquatic resource managers translate complex data about benthic macroinvertebrates found living in a stream into an overall measure of stream health. The CSCI score is calculated by comparing the expected condition with actual (observed) results (Rehn, A.C. et al., 2015). CSCI scores range from 0 (highly degraded) to greater than 1 (equivalent to reference). CSCI scoring of biological condition are as follows (per the scientific paper supporting the development of the CSCI scoring tool): greater than or equal to 0.92 = likely intact condition, 0.91 to 0.80 = possibly altered condition, 0.79 to 0.63 = likely altered condition, less than or equal to 0.62 = very likely altered condition. Sites with scores below 0.79 are considered to have exceeded the water quality objective for the aquatic life beneficial use.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
305228
Pollutant:
Benthic-Macroinvertebrate Bioassessments
LOE Subgroup:
Population/Community Degradation
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
Benthic macroinvertebrate surveys
Data Used to Assess Water Quality:
Water Board staff assessed data for 404S13672 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the threshold. CSCI scores were from 0.766763245 to 0.766763245.
All waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce significant alterations in population or community ecology or receiving water biota. In addition, the health and life history characteristics of aquatic organisms in waters affected by controllable water quality factors shall not differ significantly from those for the same waters in areas unaffected by controllable water quality factors.
The California Stream Condition Index (CSCI) is a biological scoring tool that helps aquatic resource managers translate complex data about benthic macroinvertebrates found living in a stream into an overall measure of stream health. The CSCI score is calculated by comparing the expected condition with actual (observed) results (Rehn, A.C. et al., 2015). CSCI scores range from 0 (highly degraded) to greater than 1 (equivalent to reference). CSCI scoring of biological condition are as follows (per the scientific paper supporting the development of the CSCI scoring tool): greater than or equal to 0.92 = likely intact condition, 0.91 to 0.80 = possibly altered condition, 0.79 to 0.63 = likely altered condition, less than or equal to 0.62 = very likely altered condition. Sites with scores below 0.79 are considered to have exceeded the water quality objective for the aquatic life beneficial use.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
305333
Pollutant:
Benthic-Macroinvertebrate Bioassessments
LOE Subgroup:
Population/Community Degradation
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
Benthic macroinvertebrate surveys
Data Used to Assess Water Quality:
Water Board staff assessed data for 404MBCASC to determine beneficial use support and the results are as follows: 0 of 1 samples exceeded the threshold. CSCI scores were from 0.812716161 to 0.812716161.
All waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce significant alterations in population or community ecology or receiving water biota. In addition, the health and life history characteristics of aquatic organisms in waters affected by controllable water quality factors shall not differ significantly from those for the same waters in areas unaffected by controllable water quality factors.
The California Stream Condition Index (CSCI) is a biological scoring tool that helps aquatic resource managers translate complex data about benthic macroinvertebrates found living in a stream into an overall measure of stream health. The CSCI score is calculated by comparing the expected condition with actual (observed) results (Rehn, A.C. et al., 2015). CSCI scoreCondition Index (CSCI) Scores for the 2024 Integrated Report for Region 4.
SWAMP Data:
SWAMP
Water Quality Objective/Criterion:
All waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce significant alterations in population or community ecology or receiving water biota. In addition, the health and life history characteristics of aquatic organisms in waters affected by controllable water quality factors shall not differ significantly from those for the same waters in areas unaffected by controllable water quality factors.
The California Stream Condition Index (CSCI) is a biological scoring tool that helps aquatic resource managers translate complex data about benthic macroinvertebrates found living in a stream into an overall measure of stream health. The CSCI score is calculated by comparing the expected condition with actual (observed) results (Rehn, A.C. et al., 2015). CSCI scores range from 0 (highly degraded) to greater than 1 (equivalent to reference). CSCI scoring of biological condition are as follows (per the scientific paper supporting the development of the CSCI scoring tool): greater than or equal to 0.92 = likely intact condition, 0.91 to 0.80 = possibly altered condition, 0.79 to 0.63 = likely altered condition, less than or equal to 0.62 = very likely altered condition. Sites with scores below 0.79 are considered to have exceeded the water quality objective for the aquatic life beneficial use.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
305333
Pollutant:
Benthic-Macroinvertebrate Bioassessments
LOE Subgroup:
Population/Community Degradation
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
Benthic macroinvertebrate surveys
Data Used to Assess Water Quality:
Water Board staff assessed data for 404MBCASC to determine beneficial use support and the results are as follows: 0 of 1 samples exceeded the threshold. CSCI scores were from 0.812716161 to 0.812716161.
All waters shall be maintained free of toxic substances in concentrations that are lethal to or that produce significant alterations in population or community ecology or receiving water biota. In addition, the health and life history characteristics of aquatic organisms in waters affected by controllable water quality factors shall not differ significantly from those for the same waters in areas unaffected by controllable water quality factors.
The California Stream Condition Index (CSCI) is a biological scoring tool that helps aquatic resource managers translate complex data about benthic macroinvertebrates found living in a stream into an overall measure of stream health. The CSCI score is calculated by comparing the expected condition with actual (observed) results (Rehn, A.C. et al., 2015). CSCI scores range from 0 (highly degraded) to greater than 1 (equivalent to reference). CSCI scoring of biological condition are as follows (per the scientific paper supporting the development of the CSCI scoring tool): greater than or equal to 0.92 = likely intact condition, 0.91 to 0.80 = possibly altered condition, 0.79 to 0.63 = likely altered condition, less than or equal to 0.62 = very likely altered condition. Sites with scores below 0.79 are considered to have exceeded the water quality objective for the aquatic life beneficial use.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266220
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266220
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
252932
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
19
Number of Exceedances:
4
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 4 of 19 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266120
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 4 of 19 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266120
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266367
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266182
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
265751
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266367
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266182
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
265751
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266143
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266261
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266305
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266143
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266261
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266305
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
252935
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
19
Number of Exceedances:
8
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 8 of 19 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
252935
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
19
Number of Exceedances:
8
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 8 of 19 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
315063
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
The Malibu Creek monitoring station is located at the existing stream gauge station (Stream Gauge No. F130-9-R) near Malibu Canyon Road, south of Piuma Road. At this location, the tributary watershed to Malibu Creek is 104.9 square miles. The entire Malibu Cwidth="33%">Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
The Malibu Creek monitoring station is located at the existing stream gauge station (Stream Gauge No. F130-9-R) near Malibu Canyon Road, south of Piuma Road. At this location, the tributary watershed to Malibu Creek is 104.9 square miles. The entire Malibu Creek Watershed is 109.9 square miles.
Temporal Representation:
Twenty samples where taken during the wet and dry season from 10/28/00 to 4/30/03 at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions:
QAPP Information:
Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
314960
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
7
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Los Angeles County Flood Control District_2010 data for Malibu Creek to determine beneficial use support and results are as follows: 7 of 20 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
314965
Temporal Representation:
Twenty samples where taken during the wet and dry season from 10/28/00 to 4/30/03 at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions:
QAPP Information:
Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
314960
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
7
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Los Angeles County Flood Control District_2010 data for Malibu Creek to determine beneficial use support and results are as follows: 7 of 20 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
314965
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
314680
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
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Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
314680
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
315000
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
315000
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
314964
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
314964
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
314686
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 2 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
314818
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 2 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
314818
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
315097
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
315097
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
314901
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
314841
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 2 samples exceeded the water quality threshold for Aluminum.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
314841
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 2 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
315017
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
The samples were collected at 1 monitoring site: 404S25298 (Malibu Creek (25298)).
Temporal Representation:
The samples were collected egion_4/2020/ref5212.xlsx">WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.
SWAMP Data:
Non-SWAMP
Water Quality Objective/Criterion:
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
315017
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
315093
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
7
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Los Angeles County Flood Control District_2010 data for Malibu Creek to determine beneficial use support and results are as follows: 7 of 20 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
315093
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
7
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Los Angeles County Flood Control District_2010 data for Malibu Creek to determine beneficial use support and results are as follows: 7 of 20 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
86292
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-11) states that: "The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges."
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266081
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-11) states that: "The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges."
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266081
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
265988
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
265988
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
86327
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 2 samples exceed the criterion for Selenium, dissolved.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.005 mg/L (California Toxics Rule, 2000).
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266072
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
The samples were collected at 1 monitoring site: 404S32468 (Malibu Creek (32468)).
Temporal Representation:
The samples were collected between the dates of 2012-06-26 and 2012-06-26
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 2 samples exceed the criterion for Selenium, dissolved.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.005 mg/L (California Toxics Rule, 2000).
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266072
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266344
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
266344
Pollutant:
Selenium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Selenium.
The selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
86349
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
2
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 2 of 2 samples exceed the criterion for Sulfate.
Table 3-8 of The Water Quality Control Plan for the Los Angeles Region specifies the Sulfate objective for the Malibu Creek within the Malibu Creek watershed as 500 mg/L.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
244028
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 2 of 2 samples exceed the criterion for Sulfate.
Table 3-8 of The Water Quality Control Plan for the Los Angeles Region specifies the Sulfate objective for the Malibu Creek within the Malibu Creek watershed as 500 mg/L.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
244028
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
86348
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
2
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 2 of 2 samples exceed the criterion for Sulfate.
Table 3-8 of The Water Quality Control Plan for the Los Angeles Region specifies the Sulfate objective for the Malibu Creek within the Malibu Creek watershed as 500 mg/L.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
244077
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
The sample was collected from the Malibu Creek Site 11406 station (404S11406).
Temporal Representation:
The sample was collected on 5/11/2009.
Environmental Conditions:
QAPP Information:
SWAMP QAPP
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
244029
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
86348
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
2
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 2 of 2 samples exceed the criterion for Sulfate.
Table 3-8 of The Water Quality Control Plan for the Los Angeles Region specifies the Sulfate objective for the Malibu Creek within the Malibu Creek watershed as 500 mg/L.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
244077
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
243965
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
8
Number of Exceedances:
7
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Los Angeles County MS4 Permit to determine beneficial use support. The results are as follows: 7 out of 8 samples exceed the criterion for Sulfate.
Station S02 (34.07611, -118.702206), located in Malibu Creek @ Piuma Road mass emission station.
Temporal Representation:
The water samples were taken between 8/31/2015 - 2/20/2019, per the monitoring requirements listed in the Los Angeles County Municipal Separate Storm Sewer Permit.
Environmental Conditions:
QAPP Information:
The work was performed in accordance with the provisions of the Los Angeles Municipal Separate Storm Sewer System quality control and quality assurance procedures listed in coordinated integrated monitoring plan.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
244169
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
The sample was collected from the Malibu Creek Random Site 104 station (404BA0104).
Temporal Representation:
The sample was collected on 6/18/2008.
Environmental Conditions:
QAPP Information:
SWAMP QAPP
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
244168
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
The sample was collected from the Malibu Creek Site 11406 station (404S11406).
Temporal Representation:
The sample was collected on 5/11/2009.
Environmental Conditions:
QAPP Information:
SWAMP QAPP
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
244029
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
243965
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
8
Number of Exceedances:
7
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Los Angeles County MS4 Permit to determine beneficial use support. The results are as follows: 7 out of 8 samples exceed the criterion for Sulfate.
Station S02 (34.07611, -118.702206), located in Malibu Creek @ Piuma Road mass emission station.
Temporal Representation:
The water samples were taken between 8/31/2015 - 2/20/2019, per the monitoring requirements listed in the Los Angeles County Municipal Separate Storm Sewer Permit.
Environmental Conditions:
QAPP Information:
The work was performed in accordance with the provisions of t
DECISION ID
150309
Region 4
Malibu Creek
Pollutant:
Indicator Bacteria
Final Listing Decision:
Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:
List on 303(d) list (being addressed by USEPA approved TMDL)(2018)
Revision Status
Revised
Sources:
Natural Sources | Nonpoint Source | Point Source
TMDL Name:
Malibu Pathogens (47 in part)
TMDL Project Code:
236
Date TMDL Approved by USEPA:
01/24/2006
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for removal on the CWA section 303(d) List under sections 2.2 and section 4.3 of the Listing Policy. Under section 4.3 of the Policy, a minimum of one line of evidence is needed to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the CWA section 303(d) List. There is sufficient justification to place it in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 55 of 116 samples exceeded geometric mean for E. coli and 25 of 85 samples exceeded the statistical threshold value for E. coli and these exceed the allowable frequency listed in Table 4.2 of the Listing Policy. 4. The Malibu Creek Bacteria TMDL was approved by USEPA on 1/24/2006. 5. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 150309, Indicator Bacteria
Region 4
Malibu Creek
LOE ID:
2255
Pollutant:
Coliform Bacteria
LOE Subgroup:
Pollutant-Water
Matrix:
Not Specified
Fraction:
None
Beneficial Use:
Water Contact Recreation
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Not Specified
Data Used to Assess Water Quality:
Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Line of Evidence (LOE) for Decision ID 150309, Indicator Bacteria
Region 4
Malibu Creek
LOE ID:
303084
Pollutant:
Escherichia coli (E. coli)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
GeoMean
Beneficial Use:
Water Contact Recreation
Number of Samples:
60
Number of Exceedances:
23
Data and Information Type:
PATHOGEN MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and the results are as follows: 23 of the 60 samples exceeded the geomean water quality threshold for E. coli. This is a six week rolling geomean that is calculated weekly.
The bacteria water quality objective to protect the REC-1 beneficial use for waters where the salinity is equal to or less than 1 part per thousand 95 percent or more of the time applies a rolling six-week geometric mean of E. coli, not to exceed 100 cfu/100 mL (ISWEBE 2018).
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
244169
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
The sample was collected from the Malibu Creek Random Site 104 station (404BA0104).
Temporal Representation:
The sample was collected on 6/18/2008.
Environmental Conditions:
QAPP Information:
SWAMP QAPP
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 172215, Benthic Community Effects
Region 4
Malibu Creek
LOE ID:
244168
Pollutant:
Sulfates
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Sulfates.
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and the results are as follows: 18 of the 32 samples exceeded the geomean water quality threshold for E. coli. This is a six week rolling geomean that is calculated weekly.
The bacteria water quality objective to protect the REC-1 beneficial use for waters where the salinity is equal to or less than 1 part per thousand 95 percent or more of the time applies a rolling six-week geometric mean of E. coli, not to exceed 100 cfu/100 mL (ISWEBE 2018).
Line of Evidence (LOE) for Decision ID 150309, Indicator Bacteria
Region 4
Malibu Creek
LOE ID:
303124
Pollutant:
Escherichia coli (E. coli)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
STV
Beneficial Use:
Water Contact Recreation
Number of Samples:
36
Number of Exceedances:
10
Data and Information Type:
PATHOGEN MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and the results are as follows: 10 of the 36 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.
The bacteria water quality objective to protect the REC-1 beneficial use where the salinity is less than 1 parts per thousand 95 percent or more of the time applies a statistical threshold value to E. coli of 320 cfu/100 mL, not to be exceeded by more than 10 percent of samples within a calendar month (ISWEBE 2018).
Line of Evidence (LOE) for Decision ID 150309, Indicator Bacteria
Region 4
Malibu Creek
LOE ID:
303195
Pollutant:
Escherichia coli (E. coli)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
STV
Beneficial Use:
Water Contact Recreation
Number of Samples:
14
Number of Exceedances:
6
Data and Information Type:
PATHOGEN MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and the results are as follows: 6 of the 14 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.
The bacteria water quality objective to protect the REC-1 beneficial use where the salinity is less than 1 parts per thousand 95 percent or more of the time applies a statistical threshold value to E. coli of 320 cfu/100 mL, not to be exceeded by more than 10 percent of samples within a calendar month (ISWEBE 2018).
Line of Evidence (LOE) for Decision ID 150309, Indicator Bacteria
Region 4
Malibu Creek
LOE ID:
303120
Pollutant:
Escherichia coli (E. coli)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
STV
Beneficial Use:
Water Contact Recreation
Number of Samples:
16
Number of Exceedances:
4
Data and Information Type:
PATHOGEN MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and the results are as follows: 4 of the 16 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.
The bacteria water quality objective to protect the REC-1 beneficial use where the salinity is less than 1 parts per thousand 95 percent or more of the time applies a statistical threshold value to E. coli of 320 cfu/100 mL, not to be exceeded by more than 10 percent of samples within a calendar month (ISWEBE 2018).
Line of Evidence (LOE) for Decision ID 150309, Indicator Bacteria
Region 4
Malibu Creek
LOE ID:
303160
Pollutant:
Escherichia coli (E. coli)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
STV
Beneficial Use:
Water Contact Recreation
Number of Samples:
19
Number of Exceedances:
5
Data and Information Type:
PATHOGEN MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and the results are as follows: 5 of the 19 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.
The bacteria water quality objective to protect the REC-1 beneficial use where the salinity is less than 1 parts per thousand 95 percent or more of the time applies a statistical threshold value to E. coli of 320 cfu/100 mL, not to be exceeded by more than 10 percent of samples within a calendar month (ISWEBE 2018).
Line of Evidence (LOE) for Decision ID 150309, Indicator Bacteria
Region 4
Malibu Creek
LOE ID:
303043
Pollutant:
Escherichia coli (E. coli)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
GeoMean
Beneficial Use:
Water Contact Recreation
Number of Samples:
24
Number of Exceedances:
14
Data and Information Type:
PATHOGEN MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and the results are as follows: 14 of the 24 samples exceeded the geomean water quality threshold for E. coli. This is a six week rolling geomean that is calculated weekly.
The bacteria water quality objective to protect the REC-1 beneficial use for waters where the salinity is equal to or less than 1 part per thousand 95 percent or more of the time applies a rolling six-week geometric mean of E. coli, not to exceed 100 cfu/100 mL (ISWEBE 2018).
Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:
List on 303(d) list (being addressed by USEPA approved TMDL)(2018)
Revision Status
Revised
Sources:
Natural Sources | Nonpoint Source | Point Source
TMDL Name:
Malibu Pathogens (47 in part)
TMDL Project Code:
236
Date TMDL Approved by USEPA:
01/24/2006
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for removal on the CWA section 303(d) List under sections 2.2 and section 4.3 of the Listing Policy. Under section 4.3 of the Policy, a minimum of one line of evidence is needed to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the CWA section 303(d) List. There is sufficient justification to place it in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 55 of 116 samples exceeded geometric mean for E. coli and 25 of 85 samples exceeded the statistical threshold value for E. coli and these exceed the allowable frequency listed in Table 4.2 of the Listing Policy. 4. The Malibu Creek Bacteria TMDL was approved by USEPA on 1/24/2006. 5. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 150309, Indicator Bacteria
Region 4
Malibu Creek
LOE ID:
2255
Pollutant:
Coliform Bacteria
LOE Subgroup:
Pollutant-Water
Matrix:
Not Specified
Fraction:
None
Beneficial Use:
Water Contact Recreation
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Not Specified
Data Used to Assess Water Quality:
Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Line of Evidence (LOE) for Decision ID 150309, Indicator Bacteria
Region 4
Malibu Creek
LOE ID:
303084
Pollutant:
Escherichia coli (E. coli)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
GeoMean
Beneficial Use:
Water Contact Recreation
Number of Samples:
60
Number of Exceedances:
23
Data and Information Type:
PATHOGEN MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and the results are as follows: 23 of the 60 samples exceeded the geomean water quality threshold for E. coli. This is a six week rolling geomean that is calculated weekly.
The bacteria water quality objective to protect the REC-1 beneficial use for waters where the salinity is equal to or less than 1 part per thousand 95 percent or more of the time applies a rolling six-week geometric mean of E. coli, not to exceed 100 cfu/100 mL (ISWEBE 2018).
Line of Evidence (LOE) for Decision ID 150309, Indicator Bacteria
Region 4
Malibu Creek
LOE ID:
303104
Pollutant:
Escherichia coli (E. coli)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
GeoMean
Beneficial Use:
Water Contact Recreation
Number of Samples:
32
Number of Exceedances:
18
Data and Information Type:
PATHOGEN MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and the results are as follows: 18 of the 32 samples exceeded the geomean water quality threshold for E. coli. This is a six week rolling geomean that is calculated weekly.
The bacteria water quality objective to protect the REC-1 beneficial use for waters where the salinity is equal to or less than 1 part per thousand 95 percent or more of the time applies a rolling six-week geometric mean of E. coli, not to exceed 100 cfu/100 mL (ISWEBE 2018).
Line of Evidence (LOE) for Decision ID 150309, Indicator Bacteria
Region 4
Malibu Creek
LOE ID:
303124
Pollutant:
Escherichia coli (E. coli)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
STV
Beneficial Use:
Water Contact Recreation
Number of Samples:
36
Number of Exceedances:
10
Data and Information Type:
PATHOGEN MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and the results are as follows: 10 of the 36 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.
The bacteria water quality objective to protect the REC-1 beneficial use where the salinity is less than 1 parts per thousand 95 percent or more of the time applies a statistical threshold value to E. coli of 320 cfu/100 mL, not to be exceeded by more than 10 percent of samples within a calendar month (ISWEBE 2018).
Line of Evidence (LOE) for Decision ID 150309, Indicator Bacteria
Region 4
Malibu Creek
LOE ID:
303195
Pollutant:
Escherichia coli (E. coli)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
STV
Beneficial Use:
Water Contact Recreation
Number of Samples:
14
Number of Exceedances:
6
Data and Information Type:
PATHOGEN MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and the results are as follows: 6 of the 14 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.
The bacteria water quality objective to protect the REC-1 beneficial use where the salinity is less than 1 parts per thousand 95 percent or more of the time applies a statistical threshold value to E. coli of 320 cfu/100 mL, not to be exceeded by more than 10 percent of samples within a calendar month (ISWEBE 2018).
Line of Evidence (LOE) for Decision ID 150309, Indicator Bacteria
Region 4
Malibu Creek
LOE ID:
303120
Pollutant:
Escherichia coli (E. coli)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
STV
Beneficial Use:
Water Contact Recreation
Number of Samples:
16
Number of Exceedances:
4
Data and Information Type:
PATHOGEN MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and the results are as follows: 4 of the 16 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.
The bacteria water quality objective to protect the REC-1 beneficial use where the salinity is less than 1 parts per thousand 95 percent or more of the time applies a statistical threshold value to E. coli of 320 cfu/100 mL, not to be exceeded by more than 10 percent of samples within a calendar month (ISWEBE 2018).
Line of Evidence (LOE) for Decision ID 150309, Indicator Bacteria
Region 4
Malibu Creek
LOE ID:
303160
Pollutant:
Escherichia coli (E. coli)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
STV
Beneficial Use:
Water Contact Recreation
Number of Samples:
19
Number of Exceedances:
5
Data and Information Type:
PATHOGEN MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and the results are as follows: 5 of the 19 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.
The bacteria water quality objective to protect the REC-1 beneficial use where the salinity is less than 1 parts per thousand 95 percent or more of the time applies a statistical threshold value to E. coli of 320 cfu/100 mL, not to be exceeded by more than 10 percent of samples within a calendar month (ISWEBE 2018).
Line of Evidence (LOE) for Decision ID 150309, Indicator Bacteria
Region 4
Malibu Creek
LOE ID:
303043
Pollutant:
Escherichia coli (E. coli)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
GeoMean
Beneficial Use:
Water Contact Recreation
Number of Samples:
24
Number of Exceedances:
14
Data and Information Type:
PATHOGEN MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and the results are as follows: 14 of the 24 samples exceeded the geomean water quality threshold for E. coli. This is a six week rolling geomean that is calculated weekly.
The bacteria water quality objective to protect the REC-1 beneficial use for waters where the salinity is equal to or less than 1 part per thousand 95 percent or more of the time applies a rolling six-week geometric mean of E. coli, not to exceed 100 cfu/100 mL (ISWEBE 2018).
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
86323
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Alkalinity as CaCO3.
All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Colorado River Basin).
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
86312
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Alkalinity as CaCO3.
All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Colorado River Basin).
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256603
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
251805
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
86323
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Alkalinity as CaCO3.
All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Colorado River Basin).
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256632
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Spatial Representation:
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
86312
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Alkalinity as CaCO3.
All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life (Water Quality Control Plan, Colorado River Basin).
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256603
Pollutant:
Alkalinity as CaCO3
Malibu Creek
LOE ID:
256517
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256516
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
251805
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256513
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256632
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256520
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256639
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORINGtr>
Malibu Creek
LOE ID:
256517
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256516
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256524
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
The samples were colft" valign="top" width="67%">SWAMP
Water Quality Objective/Criterion:
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256513
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256644
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256646
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256520
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256647
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256524
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256648
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256644
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256646
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Region 4
Malibu Creek
LOE ID:
256629
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256631
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256647
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256946
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
The samples were collected at 1 monitoring site: 404R4S036 (Malibu Creek downstream of Malibu Canyon Rd, (1st) tunnel).
Temporal Representation:
The samples were collected between the dates of 2020-07-21 and 2020-07-21
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Evaluation Guideline:
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256648
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256519
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256515
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Region 4
Malibu Creek
LOE ID:
256629
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256631
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256514
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256946
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
251826
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256634
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256633
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256519
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256515
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
DECISION ID
150447
Region 4
Malibu Creek
Pollutant:
Ammonia
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 150447, Ammonia
Region 4
Malibu Creek
LOE ID:
257072
Pollutant:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N.
The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listing in the Los Angeles Region Basin Plan for the 30-day Average Objective for Ammonia-N for Freshwaters Applicable to Waters Subject to the “Early Life Present” Condition.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256514
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
251826
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256634
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 137538, Alkalinity as CaCO3
Region 4
Malibu Creek
LOE ID:
256633
Pollutant:
Alkalinity as CaCO3
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Alkalinity as CaCO3.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA recommended alkalinity criterion continuous concentration (CCC) for the protection of aquatic life in freshwater is a minimum value of 20,000 ug/L (4-day average).
Line of Evidence (LOE) for Decision ID 150447, Ammonia
Region 4
Malibu Creek
LOE ID:
86289
Pollutant:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Fish Spawning
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
0 of 2 samples exceed the water USEPA Temperature and pH-Dependent values of the CCC (Chronic Criterion) for Fish Early Life Stages Present for ammonia. 1 of 2 data is reported as underneath the quantitation limit. This quantitation limit is less than or equal to the water quality standard, the value will be considered as meeting the water quality standard, objective, criterion, or evaluation guideline.
Water Quality Control Plan, Los Angeles Region (Basin Plain): In order to protect aquatic life, ammonia concentrations in inland surface waters characteristic of freshwater shall not exceed the values calculated for the appropriated instream conditions shown in Tables 3-1 to 3-3 (per U.S. EPAs most recent criteria guidance document, 1999 Update of Ambient Water Quality Criteria for Ammonia). The freshwater 30-day average objective is dependent on pH, temperature, and the presence of early life stages of fish.
Line of Evidence (LOE) for Decision ID 150447, Ammonia
Region 4
Malibu Creek
LOE ID:
94421
Pollutant:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
DECISION ID
150447
Region 4
Malibu Creek
Pollutant:
Ammonia
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 150447, Ammonia
Region 4
Malibu Creek
LOE ID:
257072
Pollutant:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N.
The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listing in the Los Angeles Region Basin Plan for the 30-day Average Objective for Ammonia-N for Freshwaters Applicable to Waters Subject to the “Early Life Present” Condition.
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Ammonia as N, Total.
Aquatic Life Ambient Water Quality Criteria for Ammonia ? Freshwater (USEPA 2013): the 30-day rolling average concentration (criterion continuous concentration or CCC) of total ammonia nitrogen(in mg TAN/L) in freshwater are not to be exceeded more than once every three years on average. The CCC values are based on pH and temperature. The CCC formula is found on page 46 and the table of CCC values is on page 49.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 150447, Ammonia
Region 4
Malibu Creek
LOE ID:
2244
Pollutant:
Ammonia
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
13
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Numeric data generated from 13 samples taken from 10/31/00 to 12/3/01 at one to two-week sampling interval. No sample exceeded the one-hour average WQO. It was not possible to determine any exceedances of the 30-day average WQO since temperature data was not provided. (LACDPW, 2004c).
One hour average Basin Plan Water Quality Objectives revised in 2002 for freshwaters designated COLD and or MIGR is dependent on pH and fish species, but not temperature. WQO ranged between 5.62mg/l at a pH of 8.0 and 2.14 mg/l at a pH of 8.5. The 30-day average WQO for waters not designated for spawning are dependent on pH and temperature. These WQOs have been adopted into the basin plan and are linked and applicable to protection of aquatic life beneficial uses.
Objective/Criterion Reference:
Spatial Representation:
The samples were collected at 1 monitoring site: 404S25298 (Malibu Creek (25298)).
Temporal Representation:
The samples were collected between the dates of 2012-06-20 and 2012-06-20
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 150447, Ammonia
Region 4
Malibu Creek
LOE ID:
86289
Pollutant:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Fish Spawning
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
0 of 2 samples exceed the water USEPA Temperature and pH-Dependent values of the CCC (Chronic Criterion) for Fish Early Life Stages Present for ammonia. 1 of 2 data is reported as underneath the quantitation limit. This quantitation limit is less than or equal to the water quality standard, the value will be considered as meeting the water quality standard, objective, criterion, or evaluation guideline.
Water Quality Control Plan, Los Angeles Region (Basin Plain): In order to protect aquatic life, ammonia concentrations in inland surface waters characteristic of freshwater shall not exceed the values calculated for the appropriated instream conditions shown in Tables 3-1 to 3-3 (per U.S. EPAs most recent criteria guidance document, 1999 Update of Ambient Water Quality Criteria for Ammonia). The freshwater 30-day average objective is dependent on pH, temperature, and the presence of early life stages of fish.
One sample site sampled during the dry and wet season beginning from 10/31/00 through 12/3/01at approximately one to two week intervals.
Temporal Representation:
Thirteen (13) samples where taken during the wet and dry season from 10/31/00 to 12/3/01at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions:
QAPP Information:
Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 150447, Ammonia
Region 4
Malibu Creek
LOE ID:
257078
Pollutant:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N.
The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listing in the Los Angeles Region Basin Plan for the 30-day Average Objective for Ammonia-N for Freshwaters Applicable to Waters Subject to the “Early Life Present” Condition.
Line of Evidence (LOE) for Decision ID 150447, Ammonia
Region 4
Malibu Creek
LOE ID:
257053
Pollutant:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Ammonia as N, Total.
Aquatic Life Ambient Water Quality Criteria for Ammonia ? Freshwater (USEPA 2013): the 30-day rolling average concentration (criterion continuous concentration or CCC) of total ammonia nitrogen(in mg TAN/L) in freshwater are not to be exceeded more than once every three years on average. The CCC values are based on pH and temperature. The CCC formula is found on page 46 and the table of CCC values is on page 49.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 150447, Ammonia
Region 4
Malibu Creek
LOE ID:
2244
Pollutant:
Ammonia
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
13
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Numeric data generated from 13 samples taken from 10/31/00 to 12/3/01 at one to two-week sampling interval. No sample exceeded the one-hour average WQO. It was not possible to determine any exceedances of the 30-day average WQO since temperature data was not provided. (LACDPW, 2004c).
One hour average Basin Plan Water Quality Objectives revised in 2002 for freshwaters designated COLD and or MIGR is dependent on pH and fish species, but not temperature. WQO ranged between 5.62mg/l at a pH of 8.0 and 2.14 mg/l at a pH of 8.5. The 30-day average WQO for waters not designated for spawning are dependent on pH and temperature. These WQOs have been adopted into the basin plan and are linked and applicable to protection of aquatic life beneficial uses.
Objective/Criterion Reference:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N.
The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listing in the Los Angeles Region Basin Plan for the 30-day Average Objective for Ammonia-N for Freshwaters Applicable to Waters Subject to the “Early Life Present” Condition.
Line of Evidence (LOE) for Decision ID 150447, Ammonia
Region 4
Malibu Creek
LOE ID:
257088
Pollutant:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N.
The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listing in the Los Angeles Region Basin Plan for the 30-day Average Objective for Ammonia-N for Freshwaters Applicable to Waters Subject to the “Early Life Present” Condition.
One sample site sampled during the dry and wet season beginning from 10/31/00 through 12/3/01at approximately one to two week intervals.
Temporal Representation:
Thirteen (13) samples where taken during the wet and dry season from 10/31/00 to 12/3/01at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions:
QAPP Information:
Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 150447, Ammonia
Region 4
Malibu Creek
LOE ID:
257078
Pollutant:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N.
The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listing in the Los Angeles Region Basin Plan for the 30-day Average Objective for Ammonia-N for Freshwaters Applicable to Waters Subject to the “Early Life Present” Condition.
Line of Evidence (LOE) for Decision ID 150447, Ammonia
Region 4
Malibu Creek
LOE ID:
257101
Pollutant:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N.
The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listing in the Los Angeles Region Basin Plan for the 30-day Average Objective for Ammonia-N for Freshwaters Applicable to Waters Subject to the “Early Life Present” Condition.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N.
The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listing in the Los Angeles Region Basin Plan for the 30-day Average Objective for Ammonia-N for Freshwaters Applicable to Waters Subject to the “Early Life Present” Condition.
Line of Evidence (LOE) for Decision ID 150447, Ammonia
Region 4
Malibu Creek
LOE ID:
257088
Pollutant:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N.
The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listing in the Los Angeles Region Basin Plan for the 30-day Average Objective for Ammonia-N for Freshwaters Applicable to Waters Subject to the “Early Life Present” Condition.
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Ammonia as N, Total.
Aquatic Life Ambient Water Quality Criteria for Ammonia ? Freshwater (USEPA 2013): the 30-day rolling average concentration (criterion continuous concentration or CCC) of total ammonia nitrogen(in mg TAN/L) in freshwater are not to be exceeded more than once every three years on average. The CCC values are based on pH and temperature. The CCC formula is found on page 46 and the table of CCC values is on page 49.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 150447, Ammonia
Region 4
Malibu Creek
LOE ID:
257235
Pollutant:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N.
The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listing in the Los Angeles Region Basin Plan for the 30-day Average Objective for Ammonia-N for Freshwaters Applicable to Waters Subject to the “Early Life Present” Condition.
Evaluation Guideline:
Guideline Reference:
Spatial Representation:
The samples were collected at 1 monitoring site: 404S35418 (Malibu Creek (35418)).
Temporal Representation:
The samples were collected between the dates of 2012-06-25 and 2012-06-25
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 150447, Ammonia
Region 4
Malibu Creek
LOE ID:
257101
Pollutant:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N.
The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listing in the Los Angeles Region Basin Plan for the 30-day Average Objective for Ammonia-N for Freshwaters Applicable to Waters Subject to the “Early Life Present” Condition.
Line of Evidence (LOE) for Decision ID 150447, Ammonia
Region 4
Malibu Creek
LOE ID:
257071
Pollutant:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N.
The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listing in the Los Angeles Region Basin Plan for the 30-day Average Objective for Ammonia-N for Freshwaters Applicable to Waters Subject to the “Early Life Present” Condition.
Line of Evidence (LOE) for Decision ID 150447, Ammonia
Region 4
Malibu Creek
LOE ID:
257173
Pollutant:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N.
The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listing in the Los Angeles Region Basin Plan for the 30-day Average Objective for Ammonia-N for Freshwaters Applicable to Waters Subject to the “Early Life Present” Condition.
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Ammonia as N, Total.
Aquatic Life Ambient Water Quality Criteria for Ammonia ? Freshwater (USEPA 2013): the 30-day rolling average concentration (criterion continuous concentration or CCC) of total ammonia nitrogen(in mg TAN/L) in freshwater are not to be exceeded more than once every three years on average. The CCC values are based on pH and temperature. The CCC formula is found on page 46 and the table of CCC values is on page 49.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 150447, Ammonia
Region 4
Malibu Creek
LOE ID:
257235
Pollutant:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N.
The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listing in the Los Angeles Region Basin Plan for the 30-day Average Objective for Ammonia-N for Freshwaters Applicable to Waters Subject to the “Early Life Present” Condition.
Line of Evidence (LOE) for Decision ID 150447, Ammonia
Region 4
Malibu Creek
LOE ID:
257071
Pollutant:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N.
The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listing in the Los Angeles Region Basin Plan for the 30-day Average Objective for Ammonia-N for Freshwaters Applicable to Waters Subject to the “Early Life Present” Condition.
Line of Evidence (LOE) for Decision ID 150447, Ammonia
Region 4
Malibu Creek
LOE ID:
257173
Pollutant:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N.
The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listing in the Los Angeles Region Basin Plan for the 30-day Average Objective for Ammonia-N for Freshwaters Applicable to Waters Subject to the “Early Life Present” Condition.
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137513, Antimony
Region 4
Malibu Creek
LOE ID:
251767
Pollutant:
Antimony
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Antimony.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Line of Evidence (LOE) for Decision ID 137513, Antimony
Region 4
Malibu Creek
LOE ID:
251721
Pollutant:
Antimony
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Antimony.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Line of Evidence (LOE) for Decision ID 137513, Antimony
Region 4
Malibu Creek
LOE ID:
251744
Pollutant:
Antimony
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Antimony.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Line of Evidence (LOE) for Decision ID 137513, Antimony
Region 4
Malibu Creek
LOE ID:
251722
Pollutant:
Antimony
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Antimony.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137513, Antimony
Region 4
Malibu Creek
LOE ID:
251767
Pollutant:
Antimony
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Antimony.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Line of Evidence (LOE) for Decision ID 137513, Antimony
Region 4
Malibu Creek
LOE ID:
251721
Pollutant:
Antimony
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Antimony.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Line of Evidence (LOE) for Decision ID 137513, Antimony
Region 4
Malibu Creek
LOE ID:
251744
Pollutant:
Antimony
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Antimony.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Line of Evidence (LOE) for Decision ID 137513, Antimony
Region 4
Malibu Creek
LOE ID:
251722
Pollutant:
Antimony
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Antimony.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 27 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
86344
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Arsenic, dissolved.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 0.150 mg/L (California Toxics Rule, 2000).
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
257463
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Arsenic.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (California Toxics Rule, 2000)
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
257591
Pollutant:
Arsenic
DECISION ID
137514
Region 4
Malibu Creek
Pollutant:
Arsenic
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 27 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
86344
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Arsenic, dissolved.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 0.150 mg/L (California Toxics Rule, 2000).
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
257463
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Arsenic.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (California Toxics Rule, 2000)
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
257591
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Arsenic.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (California Toxics Rule, 2000)
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
257515
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Arsenic.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (California Toxics Rule, 2000)
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
245689
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Arsenic .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Arsenic.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (California Toxics Rule, 2000)
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
257515
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Arsenic.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (California Toxics Rule, 2000)
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
245689
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Arsenic .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
245777
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Arsenic .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
245300
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Arsenic .
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Arsenic .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
245300
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Arsenic .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
245943
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Arsenic .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
245943
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Arsenic .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
245302
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Arsenic .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
245733
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluatie border="0" width="100%" cellspacing="0" cellpadding="0">
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
245302
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Arsenic .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
245733
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Arsenic .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
245516
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Arsenic .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
245516
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Arsenic .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
245921
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Arsenic .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
245921
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Arsenic .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
257416
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Arsenic.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (California Toxics Rule, 2000)
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
257299
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Arsenic.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (California Toxics Rule, 2000)
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Arsenic.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (California Toxics Rule, 2000)
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
257299
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Arsenic.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (California Toxics Rule, 2000)
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
257341
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Arsenic.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (California Toxics Rule, 2000)
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
257341
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Arsenic.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (California Toxics Rule, 2000)
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
257520
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Arsenic.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (California Toxics Rule, 2000)
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
251810
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Arsenic.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (California Toxics Rule, 2000)
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Arsenic.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (California Toxics Rule, 2000)
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
251810
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Arsenic.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (California Toxics Rule, 2000)
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
86345
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Arsenic, dissolved.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 0.150 mg/L (California Toxics Rule, 2000).
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
86345
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Arsenic, dissolved.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 0.150 mg/L (California Toxics Rule, 2000).
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
251787
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Arsenic.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (California Toxics Rule, 2000)
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
257454
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Arsenic.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (California Toxics Rule, 2000)
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
251787
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Arsenic.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (California Toxics Rule, 2000)
Line of Evidence (LOE) for Decision ID 137514, Arsenic
Region 4
Malibu Creek
LOE ID:
257454
Pollutant:
Arsenic
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Arsenic.
The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 150 ug/L. The conversion factor used to convert the total fraction criterion for arsenic to dissolved fraction criterion is 1. Therefore all data was considered to be representative of the dissolved fraction. (California Toxics Rule, 2000)
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
257654
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
257643
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
257756
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
257705
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwat
DECISION ID
137536
Region 4
Malibu Creek
Pollutant:
Bifenthrin
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
257654
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
257643
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
246099
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Bifenthrin .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for bifenthrin is the median lethal concentration (LC50) of 0.43 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.43 ug/g is the geometric mean of LC50 values for bifenthrin (Amweg et al., 2005 and Amweg and Weston, 2007).
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
257705
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
246099
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Bifenthrin .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for bifenthrin is the median lethal concentration (LC50) of 0.43 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.43 ug/g is the geometric mean of LC50 values for bifenthrin (Amweg et al., 2005 and Amweg and Weston, 2007).
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
257786
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
310118
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
257689
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratoryoid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
257786
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line o data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
245984
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Bifenthrin .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for bifenthrin is the median lethal concentration (LC50) of 0.43 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.43 ug/g is the geometric mean of LC50 values for bifenthrin (Amweg et al., 2005 and Amweg and Weston, 2007).
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
257689
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
245984
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Bifenthrin .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for bifenthrin is the median lethal concentration (LC50) of 0.43 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.43 ug/g is the geometric mean of LC50 values for bifenthrin (Amweg et al., 2005 and Amweg and Weston, 2007).
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
257674
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
310020
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
310116
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference:
Whole-sediment toxicity identification evaluation tools for pyrethroid insecticides: I. piperonyl butoxide addition. Environ. Toxicol. Chem. 26:2389-2396.
Spatial Representation:
Data were collected from 1 station(s). Station Code(s): 404S13672 (Malibu Creek 13672).
Temporal Representation:
Data for this waterbody were collected over the date range 2011-06-08 to 2011-06-08
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
257674
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
309977
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
The samples were collected at 1 monitoring site: 404BA0104 (Malibu Creek Random Site 104).
Temporal Representation:
Data for this waterbody were collected over the date range 2008-06-18 to 2008-06-18
Environmental Conditions:
QAPP Information:
Malibu Creek
LOE ID:
310020
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
310116
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
257859
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
309977
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137536, Bifenthrin
Region 4
Malibu Creek
LOE ID:
257859
Pollutant:
Bifenthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Bifenthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for bifenthrin is 0.1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of bifenthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 8 and 0 of 35 samples exceeded the criteria for cadmium in water and 0 of 4 and 0 of 4 samples exceeded the guideline for cadmium in sediment and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
257945
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Cadmium.
The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference:
DECISION ID
137515
Region 4
Malibu Creek
Pollutant:
Cadmium
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 8 and 0 of 35 samples exceeded the criteria for cadmium in water and 0 of 4 and 0 of 4 samples exceeded the guideline for cadmium in sediment and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
257945
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Cadmium.
The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
257946
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Cadmium.
The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
erboards.ca.gov/water_issues/programs/tmdl/records/state_board/2003/ref476.pdf" >Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:
The samples were collected at 1 monitoring site: 404S32468 (Malibu Creek (32468)).
Temporal Representation:
The samples were collected between the dates of 2012-06-26 and 2012-06-26
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
257946
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Cadmium.
The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
258173
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Cadmium.
The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
258086
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Cadmium.
The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference:
LOE ID:
258173
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Cadmium.
The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
258086
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Cadmium.
The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
251834
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Cadmium.
The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
251834
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Cadmium.
The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
258058
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Cadmium.
The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
258097
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Cadmium.
The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
258016
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Cadmium.
The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
257922
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Cadmium.
The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
258097
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Cadmium.
The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
258016
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Cadmium.
The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
257922
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Cadmium.
The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
246605
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
246257
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4 Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Cadmium.
The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
246605
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
246257
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
245995
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
246015
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
86379
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Cadmium, dissolved.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
246015
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
86379
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Cadmium, dissolved.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. If no hardness data were available, a value of 100 mg/L was used.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
86364
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Cadmium, dissolved.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Water Quality Control Plan, Los Angeles Region (LARWQCB 1994): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. If no hardness data were available, a value of 100 mg/L was used.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
86364
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Cadmium, dissolved.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
246242
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium .
gn="left" valign="top" width="67%">California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Water Quality Control Plan, Los Angeles Region (LARWQCB 1994): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
246408
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
246242
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
246035
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
246150
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
251814
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Cadmium.
The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 ug/L (California Toxics Rule, 2000).
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
246035
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
246150
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137515, Cadmium
Region 4
Malibu Creek
LOE ID:
251814
Pollutant:
Cadmium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Cadmium.
The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.2 ug/L (California Toxics Rule, 2000).
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137516, Chloride
Region 4
Malibu Creek
LOE ID:
86389
Pollutant:
Chloride
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
The sample collected did not exceed the objective.
The sample was collected from the Malibu Creek Site 11406 station (404S11406).
Temporal Representation:
The sample was collected on 5/11/2009.
Environmental Conditions:
QAPP Information:
DECISION ID
137516
Region 4
Malibu Creek
Pollutant:
Chloride
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137516, Chloride
Region 4
Malibu Creek
LOE ID:
86389
Pollutant:
Chloride
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
The sample collected did not exceed the objective.
The sample was collected from the Malibu Creek Site 11406 station (404S11406).
Temporal Representation:
The sample was collected on 5/11/2009.
Environmental Conditions:
QAPP Information:
SWAMP QAPP
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137516, Chloride
Region 4
Malibu Creek
LOE ID:
86382
Pollutant:
Chloride
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Chloride.
Table 3-8 of The Water Quality Control Plan for the Los Angeles Region specifies the Chloride objective for the Malibu Creek within the Malibu Creek watershed as 500 mg/L.
Line of Evidence (LOE) for Decision ID 137516, Chloride
Region 4
Malibu Creek
LOE ID:
244091
Pollutant:
Chloride
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: zero out of one samples exceed the criterion for chloride.
Line of Evidence (LOE) for Decision ID 137516, Chloride
Region 4
Malibu Creek
LOE ID:
86382
Pollutant:
Chloride
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Chloride.
Table 3-8 of The Water Quality Control Plan for the Los Angeles Region specifies the Chloride objective for the Malibu Creek within the Malibu Creek watershed as 500 mg/L.
Line of Evidence (LOE) for Decision ID 137516, Chloride
Region 4
Malibu Creek
LOE ID:
244091
Pollutant:
Chloride
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: zero out of one samples exceed the criterion for chloride.
Line of Evidence (LOE) for Decision ID 137516, Chloride
Region 4
Malibu Creek
LOE ID:
86383
Pollutant:
Chloride
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Chloride.
Table 3-8 of The Water Quality Control Plan for the Los Angeles Region specifies the Chloride objective for the Malibu Creek within the Malibu Creek watershed as 500 mg/L.
Line of Evidence (LOE) for Decision ID 137516, Chloride
Region 4
Malibu Creek
LOE ID:
86383
Pollutant:
Chloride
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Chloride.
Table 3-8 of The Water Quality Control Plan for the Los Angeles Region specifies the Chloride objective for the Malibu Creek within the Malibu Creek watershed as 500 mg/L.
Line of Evidence (LOE) for Decision ID 137516, Chloride
Region 4
Malibu Creek
LOE ID:
244166
Pollutant:
Chloride
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: zero out of one samples exceed the criterion for chloride.
Line of Evidence (LOE) for Decision ID 137516, Chloride
Region 4
Malibu Creek
LOE ID:
243963
Pollutant:
Chloride
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Los Angeles County MS4 Permit to determine beneficial use support. The results are as follows: 0 out of 2 samples exceed the criterion for Chloride.
Station S02 (34.07611, -118.702206), located in Malibu Creek @ Piuma Road mass emission station.
Temporal Representation:
The water samples were taken between 8/31/2015 - 1/7/2016, per the monitoring requirements listed in the Los Angeles County Municipal Separate Storm Sewer Permit.
Environmental Conditions:
QAPP Information:
The work was performed in accordance with the provisions of the Los Angeles Municipal Separate Storm Sewer System quality control and quality assurance procedures listed in coordinated integrated monitoring plan.
Line of Evidence (LOE) for Decision ID 137516, Chloride
Region 4
Malibu Creek
LOE ID:
244031
Pollutant:
Chloride
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: zero out of one samples exceed the criterion for chloride.
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: zero out of one samples exceed the criterion for chloride.
Line of Evidence (LOE) for Decision ID 137516, Chloride
Region 4
Malibu Creek
LOE ID:
243963
Pollutant:
Chloride
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Los Angeles County MS4 Permit to determine beneficial use support. The results are as follows: 0 out of 2 samples exceed the criterion for Chloride.
Station S02 (34.07611, -118.702206), located in Malibu Creek @ Piuma Road mass emission station.
Temporal Representation:
The water samples were taken between 8/31/2015 - 1/7/2016, per the monitoring requirements listed in the Los Angeles County Municipal Separate Storm Sewer Permit.
Environmental Conditions:
QAPP Information:
The work was performed in accordance with the provisions of the Los Angeles Municipal Separate Storm Sewer System quality control and quality assurance procedures listed in coordinated integrated monitoring plan.
Line of Evidence (LOE) for Decision ID 137516, Chloride
Region 4
Malibu Creek
LOE ID:
244031
Pollutant:
Chloride
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: zero out of one samples exceed the criterion for chloride.
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137517, Chlorophyll-a
Region 4
Malibu Creek
LOE ID:
251776
Pollutant:
Chlorophyll-a
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chlorophyll a.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
North Carolina Administrative code (NCAC), Title 15A – Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife).Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is
DECISION ID
137517
Region 4
Malibu Creek
Pollutant:
Chlorophyll-a
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
New Decision
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137517, Chlorophyll-a
Region 4
Malibu Creek
LOE ID:
251776
Pollutant:
Chlorophyll-a
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chlorophyll a.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
North Carolina Administrative code (NCAC), Title 15A – Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife).Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is not to exceed 40 ug/L.
Line of Evidence (LOE) for Decision ID 137517, Chlorophyll-a
Region 4
Malibu Creek
LOE ID:
251758
Pollutant:
Chlorophyll-a
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
7
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality threshold for Chlorophyll a.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
North Carolina Administrative code (NCAC), Title 15A – Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife).Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is not to exceed 40 ug/L.
Line of Evidence (LOE) for Decision ID 137517, Chlorophyll-a
Region 4
Malibu Creek
LOE ID:
251758
Pollutant:
Chlorophyll-a
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
7
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality threshold for Chlorophyll a.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
North Carolina Administrative code (NCAC), Title 15A – Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife).Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is not to exceed 40 ug/L.
Line of Evidence (LOE) for Decision ID 137517, Chlorophyll-a
Region 4
Malibu Creek
LOE ID:
251757
Pollutant:
Chlorophyll-a
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chlorophyll a.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
North Carolina Administrative code (NCAC), Title 15A – Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife).Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is not to exceed 40 ug/L.
Line of Evidence (LOE) for Decision ID 137517, Chlorophyll-a
Region 4
Malibu Creek
LOE ID:
251777
Pollutant:
Chlorophyll-a
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
7
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality threshold for Chlorophyll a.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
North Carolina Administrative code (NCAC), Title 15A – Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife).Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is not to exceed 40 ug/L.
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chlorophyll a.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
North Carolina Administrative code (NCAC), Title 15A – Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife).Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is not to exceed 40 ug/L.
Line of Evidence (LOE) for Decision ID 137517, Chlorophyll-a
Region 4
Malibu Creek
LOE ID:
251777
Pollutant:
Chlorophyll-a
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
7
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality threshold for Chlorophyll a.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
North Carolina Administrative code (NCAC), Title 15A – Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife).Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is not to exceed 40 ug/L.
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 8, 0 of 35 and 0 of 24 samples exceeded the criteria for chromium in water and 0 of 4 and 0 of 4 samples exceed the guideline for chromium in sediment and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to SECTION 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
86391
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Chromium, dissolved.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 8, 0 of 35 and 0 of 24 samples exceeded the criteria for chromium in water and 0 of 4 and 0 of 4 samples exceed the guideline for chromium in sediment and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to SECTION 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
86391
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Chromium, dissolved.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
86390
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Chromium, dissolved.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
86392
Pollutant:
Chromium
LOE Subgroup:
Evaluation Guideline:
Guideline Reference:
Spatial Representation:
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
86390
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Chromium, dissolved.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. If no hardness data were available, a value of 100 mg/L was used.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
86399
Pollutant:
Chromium, hexavalent
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
24
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical (conventional plus toxic pollutants)
California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The CTR for hexavalent chromium is 11 ug/L.
California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. If no hardness data were available, a value of 100 mg/L was used.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
86399
Pollutant:
Chromium, hexavalent
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
24
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical (conventional plus toxic pollutants)
California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The CTR for hexavalent chromium is 11 ug/L.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
247347
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chromium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
246682
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Sediment
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
247347
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chromium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
246682
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chromium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
246686
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chromium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chromium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
246686
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chromium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
246907
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chromium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
246907
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chromium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
251821
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Chromium.
The dissolved chromium (III) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is is hardness dependent as described in Table 1 of paragraph (b)(1). The value calculated when using a default hardness of 100 mg/L is 180 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
258816
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chromium.
The dissolved chromium (III) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is is hardness dependent as described in Table 1 of paragraph (b)(1). The value calculated when using a default hardness of 100 mg/L is 180 ug/L (California Toxics Rule, 2000).
Malibu Creek
LOE ID:
251821
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Chromium.
The dissolved chromium (III) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is is hardness dependent as described in Table 1 of paragraph (b)(1). The value calculated when using a default hardness of 100 mg/L is 180 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
258816
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chromium.
The dissolved chromium (III) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is is hardness dependent as described in Table 1 of paragraph (b)(1). The value calculated when using a default hardness of 100 mg/L is 180 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
258590
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chromium.
The dissolved chromium (III) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is is hardness dependent as described in Table 1 of paragraph (b)(1). The value calculated when using a default hardness of 100 mg/L is 180 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
258590
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chromium.
The dissolved chromium (III) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is is hardness dependent as described in Table 1 of paragraph (b)(1). The value calculated when using a default hardness of 100 mg/L is 180 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
258603
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chromium.
The dissolved chromium (III) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is is hardness dependent as described in Table 1 of paragraph (b)(1). The value calculated when using a default hardness of 100 mg/L is 180 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
258706
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chromium.
The dissolved chromium (III) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is : 0%; FONT-WEIGHT: bold; PADDING-BOTTOM: 3px; WIDTH: 100%; text-align: left; PADDING-TOP: 3px; font-smooth: always">Malibu Creek
LOE ID:
258603
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chromium.
The dissolved chromium (III) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is is hardness dependent as described in Table 1 of paragraph (b)(1). The value calculated when using a default hardness of 100 mg/L is 180 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
258706
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chromium.
The dissolved chromium (III) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is is hardness dependent as described in Table 1 of paragraph (b)(1). The value calculated when using a default hardness of 100 mg/L is 180 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
251905
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Chromium.
The dissolved chromium (III) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is is hardness dependent as described in Table 1 of paragraph (b)(1). The value calculated when using a default hardness of 100 mg/L is 180 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
251905
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Chromium.
The dissolved chromium (III) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is is hardness dependent as described in Table 1 of paragraph (b)(1). The value calculated when using a default hardness of 100 mg/L is 180 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
258709
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chromium.
The dissolved chromium (III) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is is hardness dependent as described in Table 1 of paragraph (b)(1). The value calculated when using a default hardness of 100 mg/L is 180 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
258726
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chromium.
The dissolved chromium (III) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is is hardness dependent as described in Table 1 of paragraph (b)align: left; PADDING-TOP: 3px; font-smooth: always">Malibu Creek
LOE ID:
258709
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chromium.
The dissolved chromium (III) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is is hardness dependent as described in Table 1 of paragraph (b)(1). The value calculated when using a default hardness of 100 mg/L is 180 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
258726
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chromium.
The dissolved chromium (III) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is is hardness dependent as described in Table 1 of paragraph (b)(1). The value calculated when using a default hardness of 100 mg/L is 180 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
258691
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chromium.
The dissolved chromium (III) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is is hardness dependent as described in Table 1 of paragraph (b)(1). The value calculated when using a default hardness of 100 mg/L is 180 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
258691
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chromium.
The dissolved chromium (III) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is is hardness dependent as described in Table 1 of paragraph (b)(1). The value calculated when using a default hardness of 100 mg/L is 180 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
258601
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chromium.
The dissolved chromium (III) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is is hardness dependent as described in Table 1 of paragraph (b)(1). The value calculated when using a default hardness of 100 mg/L is 180 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
246889
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chromium .
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Chromium.
The dissolved chromium (III) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is is hardness dependent as described in Table 1 of paragraph (b)(1). The value calculated when using a default hardness of 100 mg/L is 180 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
246889
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chromium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
246904
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chromium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
247394
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chromium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
246973
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chromium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
h="67%">All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
246904
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chromium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
247394
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chromium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137542, Chromium
Region 4
Malibu Creek
LOE ID:
246973
Pollutant:
Chromium
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Chromium .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 8, 0 of 95 and 0 of 20 samples exceeded the criteria for copper in water and 0 of 4 and 0 of 4 samples exceeded the guideline for copper in sediment and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
247430
Pollutant:
Copper
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference:
DECISION ID
137518
Region 4
Malibu Creek
Pollutant:
Copper
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 8, 0 of 95 and 0 of 20 samples exceeded the criteria for copper in water and 0 of 4 and 0 of 4 samples exceeded the guideline for copper in sediment and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
247430
Pollutant:
Copper
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
258921
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Copper.
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
258921
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Copper.
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
247336
Pollutant:
Copper
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
247438
Pollutant:
Copper
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
247432
Pollutant:
Copper
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
247438
Pollutant:
Copper
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper .
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
251975
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Copper.
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
2249
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Numeric data generated from 20 samples taken from 10/28/00 to 4/30/03 at one to two-week sampling interval. No sample exceeded any guideline to protect MUN BUs. (LACDPW, 2004c).
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
247432
Pollutant:
Copper
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
251975
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Copper.
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
2249
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Numeric data generated from 20 samples taken from 10/28/00 to 4/30/03 at one to two-week sampling interval. No sample exceeded any guideline to protect MUN BUs. (LACDPW, 2004c).
One sample site sampled during the dry and wet season from 10/28/00 through 4/30/03 at approximately one to two week intervals.
Temporal Representation:
Twenty (20) samples where taken during the wet and dry season from 10/28/00 to 4/30/03 at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions:
The Malibu Creek monitoring station is located at the existing stream gage station (Stream Gage No. F130-9-R) near Malibu Canyon Road, south of Piuma Road. At this location, the tributary watershed to Malibu Creek is 104.9 square miles. The entire Malibu Creek Watershed is 109.9 square miles.
QAPP Information:
Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
26028
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Aquatic Life Use:
Cold Freshwater Habitat | Fish Migration | Fish Spawning | Preservation of Rare & Endangered Species | Wetland Habitat | Wildlife Habitat
Number of Samples:
59
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality:
Data collected as part of the Los Angeles County Department of Public Works MS4 monitoring reports (1998-2007).
The California Toxics Rule lists Criterion Maximum Concentrations for Copper to protect aquatic life in freshwater. The copper criterion for each sample in freshwater is hardness dependent and varies based on the on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent criterion formula for metals.
Malibu Creek Monitoring Station (S02) is located at the existing stream gage station (Stream Gage F130-9-R) near Malibu Canyon Road, south of Piuma Road (Lat 34.07540, Long -118.70317).
Temporal Representation:
Approximately six composite samples were collected per year (four wet-weather events and two dry-weather events), from October 1998 through April 2007.
Environmental Conditions:
QAPP Information:
Data collected for compliance with NPDES Permit No. CAS004001 Monitoring and Reporting Program.
One sample site sampled during the dry and wet season from 10/28/00 through 4/30/03 at approximately one to two week intervals.
Temporal Representation:
Twenty (20) samples where taken during the wet and dry season from 10/28/00 to 4/30/03 at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions:
The Malibu Creek monitoring station is located at the existing stream gage station (Stream Gage No. F130-9-R) near Malibu Canyon Road, south of Piuma Road. At this location, the tributary watershed to Malibu Creek is 104.9 square miles. The entire Malibu Creek Watershed is 109.9 square miles.
QAPP Information:
Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
26028
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Aquatic Life Use:
Cold Freshwater Habitat | Fish Migration | Fish Spawning | Preservation of Rare & Endangered Species | Wetland Habitat | Wildlife Habitat
Number of Samples:
59
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality:
Data collected as part of the Los Angeles County Department of Public Works MS4 monitoring reports (1998-2007).
The California Toxics Rule lists Criterion Maximum Concentrations for Copper to protect aquatic life in freshwater. The copper criterion for each sample in freshwater is hardness dependent and varies based on the on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent criterion formula for metals.
Malibu Creek Monitoring Station (S02) is located at the existing stream gage station (Stream Gage F130-9-R) near Malibu Canyon Road, south of Piuma Road (Lat 34.07540, Long -118.70317).
Temporal Representation:
Approximately six composite samples were collected per year (four wet-weather events and two dry-weather events), from October 1998 through April 2007.
Environmental Conditions:
QAPP Information:
Data collected for compliance with NPDES Permit No. CAS004001 Monitoring and Reporting Program.
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
86401
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Copper, dissolved.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. If no hardness data were available, a value of 100 mg/L was used.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
86402
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Copper, dissolved.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
86401
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Copper, dissolved.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. If no hardness data were available, a value of 100 mg/L was used.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
86402
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Copper, dissolved.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
259081
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Copper.
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
258920
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Copper.
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
259199
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Copper.
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
259081
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Copper.
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
258920
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Copper.
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
259199
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Copper.
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
252120
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Copper.
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
259147
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Copper.
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
259100
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Copper.
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137518, Copper
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
252120
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Copper.
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
259147
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Copper.
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
259100
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Copper.
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
259219
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Copper.
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
259123
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Copper.
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
247704
Pollutant:
Copper
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Copper.
The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
259123
Pollutant:
Copper
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Copper.
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
247490
Pollutant:
Copper
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
247483
Pollutant:
Copper
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
247500
Pollutant:
Copper
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137539, Cyfluthrin
Region 4
Malibu Creek
LOE ID:
259400
Pollutant:
Cyfluthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyfluthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cyfluthrin is 0.2 ng/L (expressed a7%">The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
247704
Pollutant:
Copper
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
247490
Pollutant:
Copper
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
247483
Pollutant:
Copper
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137518, Copper
Region 4
Malibu Creek
LOE ID:
247500
Pollutant:
Copper
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
s a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Guideline Reference:
Water Quality Criteria Report for Cyfluthrin
Spatial Representation:
The samples were collected at 1 monitoring site: 404S13672 (Malibu Creek 13672).
Temporal Representation:
Data for this waterbody were collected over the date range 2011-06-08 to 2011-06-08
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137539, Cyfluthrin
Region 4
Malibu Creek
LOE ID:
259397
Pollutant:
Cyfluthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyfluthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Guideline Reference:
Water Quality Criteria Report for Cyfluthrin
Spatial Representation:
The samples were collected at 1 monitoring site: 404S35418 (Malibu Creek (35418)).
Temporal Representation:
Data for this waterbody were collected over the date range 2012-06-25 to 2012-06-25
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137539, Cyfluthrin
DECISION ID
137539
Region 4
Malibu Creek
Pollutant:
Cyfluthrin
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
New Decision
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137539, Cyfluthrin
Region 4
Malibu Creek
LOE ID:
259400
Pollutant:
Cyfluthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyfluthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cyfluthrin is 0.2 ng/L (expressed a; PADDING-TOP: 3px; font-smooth: always">Region 4
Malibu Creek
LOE ID:
259382
Pollutant:
Cyfluthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyfluthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Guideline Reference:
Water Quality Criteria Report for Cyfluthrin
Spatial Representation:
The samples were collected at 1 monitoring site: 404S32468 (Malibu Creek (32468)).
Temporal Representation:
Data for this waterbody were collected over the date range 2012-06-26 to 2012-06-26
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137539, Cyfluthrin
Region 4
Malibu Creek
LOE ID:
247511
Pollutant:
Cyfluthrin
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cyfluthrin, total .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for cyfluthrin is the median lethal concentration (LC50) of 1.1 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.1 ug/g is the geometric mean of LC50 values for cyfluthrin (Amweg et al., 2005).
Line of Evidence (LOE) for Decision ID 137539, Cyfluthrin
Region 4
Malibu Creek
LOE ID:
247708
Pollutant:
Cyfluthrin
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cyfluthrin, total .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for cyfluthrin is the median lethal concentration (LC50) of 1.1 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.1 ug/g is the geometric mean of LC50 values for cyfluthrin (Amweg et al., 2005).
Line of Evidence (LOE) for Decision ID 137539, Cyfluthrin
Region 4
Malibu Creek
LOE ID:
259397
Pollutant:
Cyfluthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyfluthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Guideline Reference:
Water Quality Criteria Report for Cyfluthrin
Spatial Representation:
The samples were collected at 1 monitoring site: 404S35418 (Malibu Creek (35418)).
Temporal Representation:
Data for this waterbody were collected over the date range 2012-06-25 to 2012-06-25
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137539, Cyfluthrin
Region 4
Malibu Creek
LOE ID:
259382
Pollutant:
Cyfluthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyfluthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Guideline Reference:
Water Quality Criteria Report for Cyfluthrin
Spatial Representation:
The samples were collected at 1 monitoring site: 404S32468 (Malibu Creek (32468)).
Temporal Representation:
Data for this waterbody were collected over the date range 2012-06-26 to 2012-06-26
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137539, Cyfluthrin
Region 4
Malibu Creek
LOE ID:
247511
Pollutant:
Cyfluthrin
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cyfluthrin, total .
Line of Evidence (LOE) for Decision ID 137539, Cyfluthrin
Region 4
Malibu Creek
LOE ID:
259416
Pollutant:
Cyfluthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyfluthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Guideline Reference:
Water Quality Criteria Report for Cyfluthrin
Spatial Representation:
The samples were collected at 1 monitoring site: 404S25298 (Malibu Creek (25298)).
Temporal Representation:
Data for this waterbody were collected over the date range 2012-06-20 to 2012-06-20
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137539, Cyfluthrin
Region 4
Malibu Creek
LOE ID:
259418
Pollutant:
Cyfluthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Field, Habitat, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.
SWAMP Data:
SWAMP
Water Quality Objective/Criterion:
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for cyfluthrin is the median lethal concentration (LC50) of 1.1 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.1 ug/g is the geometric mean of LC50 values for cyfluthrin (Amweg et al., 2005).
Line of Evidence (LOE) for Decision ID 137539, Cyfluthrin
Region 4
Malibu Creek
LOE ID:
247708
Pollutant:
Cyfluthrin
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cyfluthrin, total .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for cyfluthrin is the median lethal concentration (LC50) of 1.1 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.1 ug/g is the geometric mean of LC50 values for cyfluthrin (Amweg et al., 2005).
Data were collected from 1 station(s). Station Code(s): 404S13672 (Malibu Creek 13672).
Temporal Representation:
Data for this waterbody were collected over the date range 2011-06-08 to 2011-06-08Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyfluthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Guideline Reference:
Water Quality Criteria Report for Cyfluthrin
Spatial Representation:
The samples were collected at 1 monitoring site: 404S13672 (Malibu Creek 13672).
Temporal Representation:
Data for this waterbody were collected over the date range 2011-06-08 to 2011-06-08
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137539, Cyfluthrin
Region 4
Malibu Creek
LOE ID:
259352
Pollutant:
Cyfluthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyfluthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Guideline Reference:
Water Quality Criteria Report for Cyfluthrin
Spatial Representation:
The samples were collected at 1 monitoring site: 404S35418 (Malibu Creek (35418)).
Temporal Representation:
Data for this waterbody were collected over the date range 2012-06-25 to 2012-06-25
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137539, Cyfluthrin
Region 4
Malibu Creek
LOE ID:
259304
Pollutant:
Cyfluthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyfluthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Guideline Reference:
Water Quality Criteria Report for Cyfluthrin
Spatial Representation:
The samples were collected at 1 monitoring site: 404S32468 (Malibu Creek (32468)).
Temporal Representation:
Data for this waterbody were collected over the date range 2012-06-26 to 2012-06-26
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137539, Cyfluthrin
Region 4
Malibu Creek
LOE ID:
259416
Pollutant:
Cyfluthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyfluthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Guideline Reference:
Water Quality Criteria Report for Cyfluthrin
Spatial Representation:
The samples were collected at 1 monitoring site: 404S25298 (Malibu Creek (25298)).
Temporal Representation:
Data for this waterbody were collected over the date range 2012-06-20 to 2012-06-20
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137539, Cyfluthrin
Region 4
Malibu Creek
LOE ID:
259418
Pollutant:
Cyfluthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Line of Evidence (LOE) for Decision ID 137539, Cyfluthrin
Region 4
Malibu Creek
LOE ID:
259335
Pollutant:
Cyfluthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyfluthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Guideline Reference:
Water Quality Criteria Report for Cyfluthrin
Spatial Representation:
The samples were collected at 1 monitoring site: 404S25298 (Malibu Creek (25298)).
Temporal Representation:
Data for this waterbody were collected over the date range 2012-06-20 to 2012-06-20
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyfluthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Guideline Reference:
Water Quality Criteria Report for Cyfluthrin
Spatial Representation:
The samples were collected at 1 monitoring site: 404S13672 (Malibu Creek 13672).
Temporal Representation:
Data for this waterbody were collected over the date range 2011-06-08 to 2011-06-08
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137539, Cyfluthrin
Region 4
Malibu Creek
LOE ID:
259352
Pollutant:
Cyfluthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyfluthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Guideline Reference:
Water Quality Criteria Report for Cyfluthrin
Spatial Representation:
The samples were collected at 1 monitoring site: 404S35418 (Malibu Creek (35418)).
Temporal Representation:
Data for this waterbody were collected over the date range 2012-06-25 to 2012-06-25
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137539, Cyfluthrin
Region 4
Malibu Creek
LOE ID:
259304
Pollutant:
Cyfluthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyfluthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Guideline Reference:
Water Quality Criteria Report for Cyfluthrin
Spatial Representation:
The samples were collected at 1 monitoring site: 404S32468 (Malibu Creek (32468)).
Temporal Representation:
Data for this waterbody were collected over the date range 2012-06-26 to 2012-06-26
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137539, Cyfluthrin
Region 4
Malibu Creek
LOE ID:
259335
Pollutant:
Cyfluthrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyfluthrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cyfluthrin is 0.2 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cyfluthrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Guideline Reference:
Water Quality Criteria Report for Cyfluthrin
Spatial Representation:
The samples were collected at 1 monitoring site: 404S25298 (Malibu Creek (25298)).
Temporal Representation:
Data for this waterbody were collected over the date range 2012-06-20 to 2012-06-20
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
262549
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
262702
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
262679
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
247737
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cyhalothrin, Total lambda- .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for lambda-cyhalothrin is the median lethal concentration (LC50) of 0.44 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.44 ug/g is the geometric mean of LC50 values for lambda-cyhalothrin (Amweg et al., 2005).
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
247735
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cyhalothrin, Total lambda- .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for lambda-cyhalothrin is the median lethal concentration (LC50) of 0.44 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.44 ug/g is the geometric mean of LC50 values for lambda-cyhalothrin (Amweg et al., 2005).
Guideline Reference:
DECISION ID
137541
Region 4
Malibu Creek
Pollutant:
Cyhalothrin, Lambda
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
262549
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
262702
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:
Data were collected from 1 station(s). Station Code(s): 404S13672 (Malibu Creek 13672).
Temporal Representation:
Data for this waterbody were collected over the date range 2011-06-08 to 2011-06-08
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
262717
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
:#CCCCCC; PADDING-RIGHT: 2%; PADDING-LEFT: 0%; FONT-WEIGHT: bold; PADDING-BOTTOM: 3px; WIDTH: 100%; text-align: left; PADDING-TOP: 3px; font-smooth: always">Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
262679
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
247737
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYRegion 4
Malibu Creek
LOE ID:
262625
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
310473
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 1 samples were collecSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cyhalothrin, Total lambda- .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for lambda-cyhalothrin is the median lethal concentration (LC50) of 0.44 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.44 ug/g is the geometric mean of LC50 values for lambda-cyhalothrin (Amweg et al., 2005).
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
247735
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cyhalothrin, Total lambda- .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for lambda-cyhalothrin is the median lethal concentration (LC50) of 0.44 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.44 ug/g is the geometric mean of LC50 values for lambda-cyhalothrin (Amweg et al., 2005).
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
310453
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
311194
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Lambda-cyhalothrin.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
311186
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Ftate_board/2008/ref3311.pdf" >Use and Toxicity of Pyrethroid Pesticides in the Central Valley, California, USA. Environmental Toxicology and Chemistry, 24:966-972, with erratum 24:No. 5
Spatial Representation:
Data were collected from 1 station(s). Station Code(s): 404S13672 (Malibu Creek 13672).
Temporal Representation:
Data for this waterbody were collected over the date range 2011-06-08 to 2011-06-08
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
262717
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
reshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Lambda-cyhalothrin.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
262534
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrRegion 4
Malibu Creek
LOE ID:
262625
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
310473
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 1 samples were collecations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
262569
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
262754
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
ted, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
310453
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
311194
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Lambda-cyhalothrin.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
311186
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Lambda-cyhalothrin.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
262534
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentr
DECISION ID
137537
Region 4
Malibu Creek
Pollutant:
Cypermethrin
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
310016
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
310061
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
262569
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137541, Cyhalothrin, Lambda
Region 4
Malibu Creek
LOE ID:
262754
Pollutant:
Cyhalothrin, Lambda
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lambda-cyhalothrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The chronic criterion for lambda-cyhalothrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of lambda-cyhalothrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
lign: left; PADDING-TOP: 3px; font-smooth: always">Malibu Creek
LOE ID:
309948
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
310167
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
259338
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
259404
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
259649
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
DECISION ID
137537
Region 4
Malibu Creek
Pollutant:
Cypermethrin
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
310016
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved conceneft" valign="top" width="67%">Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
259291
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
259628
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
310061
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
309948
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
310167
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
259338
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
259714
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
259565
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
259664
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
7%">SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
259404
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
259649
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
259291
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
259628
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
247942
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cypermethrin, Total .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for cypermethrin is the median lethal concentration (LC50) of 0.3 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.3 ug/g is the geometric mean of LC50 values for cypermethrin from Maund et al., (2002).
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
247922
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cypermethrin, Total .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for cypermethrin is the median lethal concentration (LC50) of 0.3 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.3 ug/g is the geometric mean of LC50 values for cypermethrin from Maund et al., (2002).
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
259714
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
259565
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
259664
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
DECISION ID
137540
Region 4
Malibu Creek
Pollutant:
Deltamethrin
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
260231
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
260043
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for cypermethrin is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of cypermethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
247942
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cypermethrin, Total .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for cypermethrin is the median lethal concentration (LC50) of 0.3 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.3 ug/g is the geometric mean of LC50 values for cypermethrin from Maund et al., (2002).
Line of Evidence (LOE) for Decision ID 137537, Cypermethrin
Region 4
Malibu Creek
LOE ID:
247922
Pollutant:
Cypermethrin
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cypermethrin, Total .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for cypermethrin is the median lethal concentration (LC50) of 0.3 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.3 ug/g is the geometric mean of LC50 values for cypermethrin from Maund et al., (2002).
div style="background-color:#CCCCCC; PADDING-RIGHT: 2%; PADDING-LEFT: 0%; FONT-WEIGHT: bold; PADDING-BOTTOM: 3px; WIDTH: 100%; text-align: left; PADDING-TOP: 3px; font-smooth: always">Malibu Creek
LOE ID:
260026
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
259806
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
260131
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The samples were collected at 1 monitoring site: 404S32468 (Malibu Creek (32468)).
Temporal Representation:
Data for this waterbody were collected over the date range 2012-06-26 to 2012-06-26
Environmental Conditions:
QAP
DECISION ID
137540
Region 4
Malibu Creek
Pollutant:
Deltamethrin
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
260231
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
260313
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
260043
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
260026
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
259806
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Deltamethrin .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for deltamethrin is the median lethal concentration (LC50) of 0.79 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.79 ug/g is the geometric mean of LC50 values for deltamethrin (Amweg et al., 2005).
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
260113
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
309941
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
260131
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
309939
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
260313
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
247779
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
top" width="33%">SWAMP Data:
SWAMP
Water Quality Objective/Criterion:
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
309940
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
247856
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Deltamethrin .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for deltamethrin is the median lethal concentration (LC50) of 0.79 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.79 ug/g is the geometric mean of LC50 values for deltamethrin (Amweg et al., 2005).
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
260326
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Deltamethrin .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for deltamethrin is the median lethal concentration (LC50) of 0.79 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.79 ug/g is the geometric mean of LC50 values for deltamethrin (Amweg et al., 2005).
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
260113
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
309941
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
DECISION ID
137544
Region 4
Malibu Creek
Pollutant:
Esfenvalerate/Fenvalerate
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
261036
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
248706
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Esfenvalerate/Fenvalerate, Total .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for esfenvalerate/fenvalerate is the median lethal concentration (LC50) of 1.5 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.5 ug/g is the geometric mean of LC50 values for esfenvalerate/fenvalerate (Amweg et al., 2005).
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
310398
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
261035
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 1 samples were collected, 1 of these samples were notle="background-color:#CCCCCC; PADDING-RIGHT: 2%; PADDING-LEFT: 0%; FONT-WEIGHT: bold; PADDING-BOTTOM: 3px; WIDTH: 100%; text-align: left; PADDING-TOP: 3px; font-smooth: always">Malibu Creek
LOE ID:
310066
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
309939
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
261095
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
309940
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
247856
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Deltamethrin .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for deltamethrin is the median lethal concentration (LC50) of 0.79 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 0.79 ug/g is the geometric mean of LC50 values for deltamethrin (Amweg et al., 2005).
Line of Evidence (LOE) for Decision ID 137540, Deltamethrin
Region 4
Malibu Creek
LOE ID:
260326
Pollutant:
Deltamethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
248606
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Esfenvalerate/Fenvalerate, Total .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for esfenvalerate/fenvalerate is the median lethal concentration (LC50) of 1.5 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.5 ug/g is the geometric mean of LC50 values for esfenvalerate/fenvalerate (Amweg et al., 2005).
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
261279
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
311184
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Esfenvalerate.
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
261036
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
248706
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Esfenvalerate/Fenvalerate, Total .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for esfenvalerate/fenvalerate is the median lethal concentration (LC50) of 1.5 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.5 ug/g is the geometric mean of LC50 values for esfenvalerate/fenvalerate (Amweg et al., 2005).
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
310398
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
261035
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 1 samples were collected, 1 of these samples were not="left" valign="top" width="33%">SWAMP Data:
SWAMP
Water Quality Objective/Criterion:
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
311190
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Esfenvalerate.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
261095
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
248606
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Esfenvalerate/Fenvalerate, Total .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for esfenvalerate/fenvalerate is the median lethal concentration (LC50) of 1.5 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1.5 ug/g is the geometric mean of LC50 values for esfenvalerate/fenvalerate (Amweg et al., 2005).
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
MaCA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
261152
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this aslibu Creek
LOE ID:
261279
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
311184
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Esfenvalerate.
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
261153
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
261482
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
311190
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Esfenvalerate.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
310237
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
261238
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
261152
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this as
DECISION ID
137543
Region 4
Malibu Creek
Pollutant:
Fenpropathrin
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
248505
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fenpropathrin .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for fenpropathrin is the median lethal concentration (LC50) of 1 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1 ug/g is the geometric mean of LC50 values for fenpropathrin from Ding et al., ( 2011).
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
261595
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
310704
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
310577
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
261153
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137544, Esfenvalerate/Fenvalerate
Region 4
Malibu Creek
LOE ID:
261482
Pollutant:
Esfenvalerate/Fenvalerate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Esfenvalerate. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for esfenvalerate is 0.3 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of esfenvalerate were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
310534
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
310481
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
261527
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
261478
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The samples were collected at 1 monitoring site: 404S32468 (Malibu Creek (32468)).
Temporal Representation:
Data for this waterbody were collected over the date range 2012-06-26
DECISION ID
137543
Region 4
Malibu Creek
Pollutant:
Fenpropathrin
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
248505
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fenpropathrin .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for fenpropathrin is the median lethal concentration (LC50) of 1 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1 ug/g is the geometric mean of LC50 values for fenpropathrin from Ding et al., ( 2011).
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
261595
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
310704
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
310577
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
261494
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
261426
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
248570
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fenpropathrin .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
310534
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
310481
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
261527
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality th Angeles Region R4 Basin Plan
Evaluation Guideline:
The evaluation guideline for fenpropathrin is the median lethal concentration (LC50) of 1 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1 ug/g is the geometric mean of LC50 values for fenpropathrin from Ding et al., ( 2011).
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
261373
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
261478
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The samples were collected at 1 monitoring site: 404S32468 (Malibu Creek (32468)).
Temporal Representation:
Data for this waterbody were collected over the date range 2012-06-26 HT: bold; PADDING-BOTTOM: 3px; WIDTH: 100%; text-align: left; PADDING-TOP: 3px; font-smooth: always">Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
261375
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
261358
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
261494
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
261426
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
248570
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Fenpropathrin .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for fenpropathrin is the median lethal concentration (LC50) of 1 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 1 ug/g is the geometric mean of LC50 values for fenpropathrin from Ding et al., ( 2011).
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
261373
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 4, 0 of 27, 1 of 3 and 1 of 3 samples exceeded the criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137520, Iron
Region 4
Malibu Creek
LOE ID:
86436
Pollutant:
Iron
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Iron, Dissolved.
Water Quality Control Plan, Central Valley Region, Tulare Lake Basin: waters shall not contain chemical constituents in concentrations that adversely affect beneficial uses.
National Recommended Water QualHT: bold; PADDING-BOTTOM: 3px; WIDTH: 100%; text-align: left; PADDING-TOP: 3px; font-smooth: always">Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
261375
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137543, Fenpropathrin
Region 4
Malibu Creek
LOE ID:
261358
Pollutant:
Fenpropathrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenpropathrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
ity Criteria Continuous Concentrations are intended protect aquatic organisms from chronic exposures (expressed as 4-day average concentration) in freshwater. The evaluation guideline for iron is 1,000 ug/L to protect warm freshwater habitat.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
National Recommended Water Quality Criteria Continuous Concentrations are intended protect aquatic organisms from chronic exposures (expressed as 4-day average concentration) in freshwater. The evaluation guideline for iron is 1,000 ug/L to protect warm freshwater habitat.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137520, Iron
Region 4
Malibu Creek
LOE ID:
86435
Pollutant:
Iron
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Iron, Dissolved.
Water Quality Control Plan, Central Valley Region, Tulare Lake Basin: waters shall not contain chemical constituents in concentrations that adversely affect beneficial uses.
National Recommended Water Quality Criteria Continuous Concentrations are intended protect aquatic organisms from chronic exposures (expressed as 4-day average concentration) in freshwater. The evaluation guideline for iron is 1,000 ug/L to protect warm freshwater habitat.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137520, Iron
Region 4
Malibu Creek
LOE ID:
252446
Pollutant:
Iron
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Iron.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentrations are intended protect freshwater aquatic organisms from chronic exposures and are expressed as 4-day average concentrations. The evaluation guideline for Iron is 1,000 ug/L.
Line of Evidence (LOE) for Decision ID 137520, Iron
Region 4
Malibu Creek
LOE ID:
252367
Pollutant:
Iron
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 2 samples exceeded the water quality threshold for Iron.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentrations are intended protect freshwater aquatic organisms from chronic exposures and are expressed as 4-day average concentrations. The evaluation guideline for iron is 1,000 ug/L.
Line of Evidence (LOE) for Decision ID 137520, Iron
Region 4
Malibu Creek
LOE ID:
252498
Pollutant:
Iron
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Iron.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentrations are intended protect freshwater aquatic organisms from chronic exposures and are expressed as 4-day average concentrations. The evaluation guideline for iron is 1,000 ug/L.
Line of Evidence (LOE) for Decision ID 137520, Iron
Region 4
Malibu Creek
LOE ID:
262486
Pollutant:
Iron
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Iron.
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 4, 0 of 27, 1 of 3 and 1 of 3 samples exceeded the criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137520, Iron
Region 4
Malibu Creek
LOE ID:
86436
Pollutant:
Iron
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Iron, Dissolved.
Water Quality Control Plan, Central Valley Region, Tulare Lake Basin: waters shall not contain chemical constituents in concentrations that adversely affect beneficial uses.
National Recommended Water Qual"left" valign="top" width="33%">Water Quality Objective/Criterion:
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentrations are intended protect freshwater aquatic organisms from chronic exposures and are expressed as 4-day average concentrations. The evaluation guideline for iron is 1,000 ug/L.
Line of Evidence (LOE) for Decision ID 137520, Iron
Region 4
Malibu Creek
LOE ID:
262247
Pollutant:
Iron
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Iron.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentrations are intended protect freshwater aquatic organisms from chronic exposures and are expressed as 4-day average concentrations. The evaluation guideline for Iron is 1,000 ug/L.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
National Recommended Water Quality Criteria Continuous Concentrations are intended protect aquatic organisms from chronic exposures (expressed as 4-day average concentration) in freshwater. The evaluation guideline for iron is 1,000 ug/L to protect warm freshwater habitat.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137520, Iron
Region 4
This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137520, Iron
Region 4
Malibu Creek
LOE ID:
262394
Pollutant:
Iron
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Iron.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentrations are intended protect freshwater aquatic organisms from chronic exposures and are expressed as 4-day average concentrations. The evaluation guideline for Iron is 1,000 ug/L.
Line of Evidence (LOE) for Decision ID 137520, Iron
Region 4
Malibu Creek
LOE ID:
262265
Pollutant:
Iron
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Iron.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentrations are intended protect freshwater aquatic organisms from chronic exposures and are expressed as 4-day average concentrations. The evaluation guideline for iron is 1,000 ug/L.
Line of Evidence (LOE) for Decision ID 137520, Iron
Region 4
Malibu Creek
LOE ID:
252524
Pollutant:
Iron
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 2 samples exceeded the water quality threshold for Iron.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentrations are intended protect freshwater aquatic organisms from chronic exposures and are expressed as 4-day average concentrations. The evaluation guideline for Iron is 1,000 ug/L.
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Iron, Dissolved.
Water Quality Control Plan, Central Valley Region, Tulare Lake Basin: waters shall not contain chemical constituents in concentrations that adversely affect beneficial uses.
National Recommended Water Quality Criteria Continuous Concentrations are intended protect aquatic organisms from chronic exposures (expressed as 4-day average concentration) in freshwater. The evaluation guideline for iron is 1,000 ug/L to protect warm freshwater habitat.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137520, Iron
Region 4
Malibu Creek
LOE ID:
252446
Pollutant:
Iron
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Iron.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentrations are intended protect freshwater aquatic organisms from chronic exposures and are expressed as 4-day average concentrations. The evaluation guideline for Iron is 1,000 ug/L.
Line of Evidence (LOE) for Decision ID 137520, Iron
Region 4
Malibu Creek
LOE ID:
252367
Pollutant:
Iron
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 2 samples exceeded the water quality threshold for Iron.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentrations are intended protect freshwater aquatic organisms from chronic exposures and are expressed as 4-day average concentrations. The evaluation guideline for iron is 1,000 ug/L.
Line of Evidence (LOE) for Decision ID 137520, Iron
Region 4
Malibu Creek
LOE ID:
252498
Pollutant:
Iron
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Iron.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentrations are intended protect freshwater aquatic organisms from chronic exposures and are expressed as 4-day average concentrations. The evaluation guideline for iron is 1,000 ug/L.
Line of Evidence (LOE) for Decision ID 137520, Iron
Region 4
Malibu Creek
LOE ID:
262486
Pollutant:
Iron
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Iron.
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 8, 0 of 29 and 0 of 20 samples exceeded the criteria and 0 of 4 and 0 of 4 samples exceeded the guideline and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
86279
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Lead.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
262952
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead.
The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
86280
Pollutant:
Water Quality Objective/Criterion:
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentrations are intended protect freshwater aquatic organisms from chronic exposures and are expressed as 4-day average concentrations. The evaluation guideline for iron is 1,000 ug/L.
Line of Evidence (LOE) for Decision ID 137520, Iron
Region 4
Malibu Creek
LOE ID:
262247
Pollutant:
Iron
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Iron.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentrations are intended protect freshwater aquatic organisms from chronic exposures and are expressed as 4-day average concentrations. The evaluation guideline for Iron is 1,000 ug/L.
Line of Evidence (LOE) for Decision ID 137520, Iron
Region 4
Malibu Creek
LOE ID:
262394
Pollutant:
Iron
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Iron.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentrations are intended protect freshwater aquatic organisms from chronic exposures and are expressed as 4-day average concentrations. The evaluation guideline for Iron is 1,000 ug/L.
Line of Evidence (LOE) for Decision ID 137520, Iron
Region 4
Malibu Creek
LOE ID:
262265
Pollutant:
Iron
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Iron.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentrations are intended protect freshwater aquatic organisms from chronic exposures and are expressed as 4-day average concentrations. The evaluation guideline for iron is 1,000 ug/L.
Line of Evidence (LOE) for Decision ID 137520, Iron
Region 4
Malibu Creek
LOE ID:
252524
Pollutant:
Iron
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 2 samples exceeded the water quality threshold for Iron.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentrations are intended protect freshwater aquatic organisms from chronic exposures and are expressed as 4-day average concentrations. The evaluation guideline for Iron is 1,000 ug/L.
California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. If no hardness data were available, a value of 100 mg/L was used.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
2250
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Numeric data generated from 20 samples taken from 10/28/00 to 4/30/03 at one to two-week sampling interval. No sample exceeded any WQO,criteria or guideline associated with the total fraction of Lead in water to protect established BUs. (LACDPW, 2004c).
top" width="67%">One sample site sampled during the dry and wet season beginning from 10/28/00 through 4/30/03 at approximately one to two week intervals.
Temporal Representation:
Twenty (20) samples where taken during the wet and dry season from 10/12/00 to 4/30/03 at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions:
The Malibu Creek monitoring station is located at the existing stream gage station (Stream Gage No. F130-9-R) near Malibu Canyon Road, south of Piuma Road. At this location, the tributary watershed to Malibu Creek is 104.9 square miles. The entire Malibu Creek Watershed is 109.9 square miles.
QAPP Information:
Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
262930
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead.
The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
263102
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead.
The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
262994
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead.
The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.5 ug/L (California Toxics Rule, 2000).
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 8, 0 of 29 and 0 of 20 samples exceeded the criteria and 0 of 4 and 0 of 4 samples exceeded the guideline and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
86279
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Lead.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
262996
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead.
The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
248989
Pollutant:
Lead
LOE Subgroup:
Pollutant-Sediment
Evaluation Guideline:
Guideline Reference:
Spatial Representation:
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
262952
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead.
The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
86280
Pollutant:
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
249228
Pollutant:
Lead
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. If no hardness data were available, a value of 100 mg/L was used.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
2250
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Numeric data generated from 20 samples taken from 10/28/00 to 4/30/03 at one to two-week sampling interval. No sample exceeded any WQO,criteria or guideline associated with the total fraction of Lead in water to protect established BUs. (LACDPW, 2004c).
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
249370
Pollutant:
Lead
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
One sample site sampled during the dry and wet season beginning from 10/28/00 through 4/30/03 at approximately one to two week intervals.
Temporal Representation:
Twenty (20) samples where taken during the wet and dry season from 10/12/00 to 4/30/03 at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions:
The Malibu Creek monitoring station is located at the existing stream gage station (Stream Gage No. F130-9-R) near Malibu Canyon Road, south of Piuma Road. At this location, the tributary watershed to Malibu Creek is 104.9 square miles. The entire Malibu Creek Watershed is 109.9 square miles.
QAPP Information:
Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
262930
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead.
The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.5 ug/L (California Toxics Rule, 2000).
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
252671
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Lead.
The dissolved lead criterion continuous concentration (expressed as a :
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead.
The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
262994
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead.
The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
263136
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead.
The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
262996
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead.
The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
248989
Pollutant:
Lead
LOE Subgroup:
Pollutant-Sediment
Malibu Creek
LOE ID:
262863
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead.
The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
248869
Pollutant:
Lead
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
249228
Pollutant:
Lead
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
248775
Pollutant:
Lead
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
249370
Pollutant:
Lead
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
249270
Pollutant:
Lead
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
252671
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Lead.
The dissolved lead criterion continuous concentration (expressed as a ne of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
248843
Pollutant:
Lead
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
249372
Pollutant:
Lead
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead .
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
263136
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead.
The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
SWAMP Data:
SWAMP
Water Quality Objective/Criterion:
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
252387
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Lead.
The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
263016
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead.
The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
86438
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Lead.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead.
The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
248869
Pollutant:
Lead
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
248775
Pollutant:
Lead
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
4 lines of evidence are available in the administrative record to assess this pollutant. 0 of 1 sample exceeded the criteria. 0 of 22 samples exceeded the criteria. 0 of 2 samples exceeded the criteria. 0 of 2 samples exceeded the criteria.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 1, 0 of 22, 0 of 2 and 0 of 2 samples exceeded the criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 149708, Mercury
Region 4
Malibu Creek
LOE ID:
86281
Pollutant:
Mercury
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
21
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality:
None of the 21 samples exceeded the evaluation guideline. The reporting limits for two of the samples exceeded the guideline therefore were not used in this assessment.
National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to elemental mercury is 0.77 ug/L.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 149708, Mercury
Region 4
Malibu Creek
LOE ID:
252420
Pollutant:
Mercury
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Mercury.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentration (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Line of Evidence (LOE) for Decision ID 149708, Mercury
Region 4 ne of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
248843
Pollutant:
Lead
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
249372
Pollutant:
Lead
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead .
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Mercury.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentration (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Line of Evidence (LOE) for Decision ID 149708, Mercury
Region 4
Malibu Creek
LOE ID:
252398
Pollutant:
Mercury
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Mercury.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentration (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Line of Evidence (LOE) for Decision ID 149708, Mercury
Region 4
Malibu Creek
LOE ID:
252437
Pollutant:
Mercury
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Mercury.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentration (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.
SWAMP Data:
SWAMP
Water Quality Objective/Criterion:
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
252387
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Lead.
The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
263016
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead.
The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 2.5 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137521, Lead
Region 4
Malibu Creek
LOE ID:
86438
Pollutant:
Lead
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Lead.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
21 Lines of evidence are available in the administrative record to assess this pollutant.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 8, and 0 of 36 samples exceeded the criteria for nickel in water and 0 of 4 and 0 4 samples exceeded the guidelines for nickel in sediment, and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
263779
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel.
The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 ug/L (California Toxics Rule, 2000).
Objective
DECISION ID
149708
Region 4
Malibu Creek
Pollutant:
Mercury
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
4 lines of evidence are available in the administrative record to assess this pollutant. 0 of 1 sample exceeded the criteria. 0 of 22 samples exceeded the criteria. 0 of 2 samples exceeded the criteria. 0 of 2 samples exceeded the criteria.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 1, 0 of 22, 0 of 2 and 0 of 2 samples exceeded the criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 149708, Mercury
Region 4
Malibu Creek
LOE ID:
86281
Pollutant:
Mercury
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
21
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality:
None of the 21 samples exceeded the evaluation guideline. The reporting limits for two of the samples exceeded the guideline therefore were not used in this assessment.
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
263822
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel.
The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Water Quality Control Plan Los Angeles Region R4 Basin Plan
Evaluation Guideline:
National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to elemental mercury is 0.77 ug/L.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 149708, Mercury
Region 4
Malibu Creek
LOE ID:
252420
Pollutant:
Mercury
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Mercury.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentration (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Line of Evidence (LOE) for Decision ID 149708, Mercury
Region 4
Malibu Creek
LOE ID:
252477
Pollutant:
Mercury
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Mercury.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentration (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Line of Evidence (LOE) for Decision ID 149708, Mercury
Region 4
Malibu Creek
LOE ID:
252398
Pollutant:
Mercury
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Mercury.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentration (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Line of Evidence (LOE) for Decision ID 149708, Mercury
Region 4
Malibu Creek
LOE ID:
252437
Pollutant:
Mercury
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Mercury.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
National Recommended Water Quality Criteria Continuous Concentration (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel.
The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
252665
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Nickel.
The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 ug/L (California Toxics Rule, 2000).
California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. If no hardness data were available, a value of 100 mg/L was used.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
86284
P
DECISION ID
137522
Region 4
Malibu Creek
Pollutant:
Nickel
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
21 Lines of evidence are available in the administrative record to assess this pollutant.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 8, and 0 of 36 samples exceeded the criteria for nickel in water and 0 of 4 and 0 4 samples exceeded the guidelines for nickel in sediment, and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
263779
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel.
The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
263822
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel.
The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Nickel
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Nickel, dissolved.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
86283
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Nickel, dissolved.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
263950
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel.
The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
263956
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Water
Matrix:
Malibu Creek
LOE ID:
263842
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel.
The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
252665
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Nickel.
The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 ug/L (California Toxics Rule, 2000).
California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. If no hardness data were available, a value of 100 mg/L was used.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
86284
Pth="67%">Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel.
The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
263949
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel.
The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
263802
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel.
The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
249893
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Sediment
Matrix:
Nickel
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Nickel, dissolved.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
86283
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Nickel, dissolved.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
263950
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel.
The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
263956
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Water
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Nickel .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
250122
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Nickel .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
249803
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Nickel .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel.
The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
263949
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel.
The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
263802
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel.
The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
249893
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Sediment
Matrix:
Malibu Creek
LOE ID:
249957
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Nickel .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
249915
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Nickel .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
249916
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Nickel .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Nickel .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
250122
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Nickel .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
249960
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Nickel .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
249980
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples excee evaluation guideline for nickel is the probable effect concentration (PEC) of 48.6 mg/kg dry weight (MacDonald et al., 2000a).
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
249803
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Nickel .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
252686
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Nickel.
The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
263870
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel.
The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 ug/L (California Toxics Rule, 2000).
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Nickel .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
249915
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Nickel .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
249916
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Nickel .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137523, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 4
Malibu Creek
LOE ID:
86288
Pollutant:
Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Nitrate/Nitrite as N.
Table 3-8 of The Water Quality Control Plan for the Los Angeles Region specifies the Nitrate/Nitrite as N objective for the Malibu Creek within the Malibu Creek watershed as 10 mg/L.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
< colspan="2">
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
249960
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Nickel .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
249980
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exce/tr>
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137523, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 4
Malibu Creek
LOE ID:
86287
Pollutant:
Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Nitrate/Nitrite as N.
Table 3-8 of The Water Quality Control Plan for the Los Angeles Region specifies the Nitrate/Nitrite as N objective for the Malibu Creek within the Malibu Creek watershed as 10 mg/L.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
252686
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Nickel.
The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137522, Nickel
Region 4
Malibu Creek
LOE ID:
263870
Pollutant:
Nickel
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel.
The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 52 ug/L (California Toxics Rule, 2000).
Water Board staff assessed data from the Los Angeles County MS4 Permit to determine beneficial use support. The results are as follows: 0 out of 8 samples exceed the criterion for Nitrate + Nitrite as N.
Station S02 (34.07611, -118.702206), located in Malibu Creek @ Piuma Road mass emission station.
Temporal Representation:
The water samples were taken between 8/8/2017 - 2/20/2019, per the monitoring requirements listed in the Los Angeles County Municipal Separate Storm Sewer Permit.
Environmental Conditions:
QAPP Information:
The work was performed in accordance with the provisions of the Los Angeles Municipal Separate Storm Sewer System quality control and quality assurance procedures listed in coordinated integrated monitoring plan.
Line of Evidence (LOE) for Decision ID 137523, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 4
Malibu Creek
LOE ID:
244167
Pollutant:
Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: zero out of one samples exceed the criterion for Nitrate/Nitrite (Nitrite + Nitrate as N).
The Water Quality Control Plan for the Los Angeles Region lists a site specific objective for Nitrate/Nitrite (Nitrite + Nitrate as N) in Malibu Creek of 10 mg/L
Line of Evidence (LOE) for Decision ID 137523, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 4
Malibu Creek
LOE ID:
244092
Pollutant:
Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: zero out of one samples exceed the criterion for Nitrate/Nitrite (Nitrite + Nitrate as N).
The Water Quality Control Plan for the Los Angeles Region lists a site specific objective for Nitrate/Nitrite (Nitrite + Nitrate as N) in Malibu Creek of 10 mg/L
Line of Evidence (LOE) for Decision ID 137523, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 4
Malibu Creek
LOE ID:
244032
Pollutant:
Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: zero out of one samples exceed the criterion for Nitrate/Nitrite (Nitrite + Nitrate as N).
The Water Quality Control Plan for the Los Angeles Region lists a site specific objective for Nitrate/Nitrite (Nitrite + Nitrate as N) in Malibu Creek of 10 mg/L
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137524, Pentachlorophenol (PCP)
Region 4
Malibu Creek
LOE ID:
86294
Pollutant:
Pentachlorophenol (PCP)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
All of the samples were below the reporting limit, which was greater than criteria.
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137524, Pentachlorophenol (PCP)
Region 4
Malibu Creek
LOE ID:
252716
Pollutant:
Pentachlorophenol (PCP)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Pentachlorophenol.
The pentachlorophenol criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is pH dependent. The criterion using a default pH value of 7.8 (when pH data is not present) is 15 ug/L. (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137524, Pentachlorophenol (PCP)
Region 4
Malibu Creek
LOE ID:
253048
Pollutant:
Pentachlorophenol (PCP)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Pentachlorophenol.
The pentachlorophenol criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is pH dependent. The criterion using a default pH value of 7.8 (when pH data is not present) is 15 ug/L. (California Toxics Rule, 2000).
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137523, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 4
Malibu Creek
LOE ID:
86288
Pollutant:
Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Nitrate/Nitrite as N.
Table 3-8 of The Water Quality Control Plan for the Los Angeles Region specifies the Nitrate/Nitrite as N objective for the Malibu Creek within the Malibu Creek watershed as 10 mg/L.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137523, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 4
Malibu Creek
LOE ID:
86287
Pollutant:
Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Nitrate/Nitrite as N.
Table 3-8 of The Water Quality Control Plan for the Los Angeles Region specifies the Nitrate/Nitrite as N objective for the Malibu Creek within the Malibu Creek watershed as 10 mg/L.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137523, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 4
Malibu Creek
LOE ID:
243964
Pollutant:
Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
8
Number of Exceedances:
0
DECISION ID
137545
Region 4
Malibu Creek
Pollutant:
Permethrin
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
250558
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Permethrin, Total .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for permethrin is the median lethal concentration (LC50) of 8.9 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 8.9 ug/g is the geometric mean of LC50 values for permethrin (Amweg et al., 2005).
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
264935
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Los Angeles County MS4 Permit to determine beneficial use support. The results are as follows: 0 out of 8 samples exceed the criterion for Nitrate + Nitrite as N.
Station S02 (34.07611, -118.702206), located in Malibu Creek @ Piuma Road mass emission station.
Temporal Representation:
The water samples were taken between 8/8/2017 - 2/20/2019, per the monitoring requirements listed in the Los Angeles County Municipal Separate Storm Sewer Permit.
Environmental Conditions:
QAPP Information:
The work was performed in accordance with the provisions of the Los Angeles Municipal Separate Storm Sewer System quality control and quality assurance procedures listed in coordinated integrated monitoring plan.
Line of Evidence (LOE) for Decision ID 137523, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 4
Malibu Creek
LOE ID:
244167
Pollutant:
Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: zero out of one samples exceed the criterion for Nitrate/Nitrite (Nitrite + Nitrate as N).
The Water Quality Control Plan for the Los Angeles Region lists a site specific objective for Nitrate/Nitrite (Nitrite + Nitrate as N) in Malibu Creek of 10 mg/L
Line of Evidence (LOE) for Decision ID 137523, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 4
Malibu Creek
LOE ID:
244092
Pollutant:
Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: zero out of one samples exceed the criterion for Nitrate/Nitrite (Nitrite + Nitrate as N).
The Water Quality Control Plan for the Los Angeles Region lists a site specific objective for Nitrate/Nitrite (Nitrite + Nitrate as N) in Malibu Creek of 10 mg/L
Line of Evidence (LOE) for Decision ID 137523, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 4
Malibu Creek
LOE ID:
244032
Pollutant:
Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: zero out of one samples exceed the criterion for Nitrate/Nitrite (Nitrite + Nitrate as N).
The Water Quality Control Plan for the Los Angeles Region lists a site specific objective for Nitrate/Nitrite (Nitrite + Nitrate as N) in Malibu Creek of 10 mg/L
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
264820
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
264725
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Guideline Reference:
DECISION ID
137524
Region 4
Malibu Creek
Pollutant:
Pentachlorophenol (PCP)
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137524, Pentachlorophenol (PCP)
Region 4
Malibu Creek
LOE ID:
86294
Pollutant:
Pentachlorophenol (PCP)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
All of the samples were below the reporting limit, which was greater than criteria.
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137524, Pentachlorophenol (PCP)
Region 4
Malibu Creek
LOE ID:
252716
Pollutant:
Pentachlorophenol (PCP)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Pentachlorophenol.
The pentachlorophenol criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is pH dependent. The criterion using a default pH value of 7.8 (when pH data is not present) is 15 ug/L. (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137524, Pentachlorophenol (PCP)
Region 4
Malibu Creek
LOE ID:
253048
Pollutant:
Pentachlorophenol (PCP)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Pentachlorophenol.
The pentachlorophenol criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is pH dependent. The criterion using a default pH value of 7.8 (when pH data is not present) is 15 ug/L. (California Toxics Rule, 2000).
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
250558
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Permethrin, Total .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for permethrin is the median lethal concentration (LC50) of 8.9 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 8.9 ug/g is the geometric mean of LC50 values for permethrin (Amweg et al., 2005).
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
264935
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
264973
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
264820
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of ssues/programs/tmdl/records/state_board/2018/ref4992.pdf" >Water Quality Criteria Report for Permethrin
Spatial Representation:
The samples were collected at 1 monitoring site: 404S13672 (Malibu Creek 13672).
Temporal Representation:
Data for this waterbody were collected over the date range 2011-06-08 to 2011-06-08
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
264877
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
264725
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
310829
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
310475
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
264877
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
264990
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
310829
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by th Conditions:
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
310860
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
310475
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
The samples were collected at 1 monitoring site: 404S11406 (Malibu Creek Site 11406).
Temporal Representation:
Data for this waterbody were collected over the date range 2009-05-11 to 2009-05-11
Environmentalp" width="33%">Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Permethrin, Total .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for permethrin is the median lethal concentration (LC50) of 8.9 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 8.9 ug/g is the geometric mean of LC50 values for permethrin (Amweg et al., 2005).
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
264706
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
310860
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
250584
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Evaluation Guideline:
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
264745
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
310937
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Permethrin, Total .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for permethrin is the median lethal concentration (LC50) of 8.9 ug/g and is normalized by the percentage of organic carbon in the sediment sample. The LC50 8.9 ug/g is the geometric mean of LC50 values for permethrin (Amweg et al., 2005).
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
264706
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
251027
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Pyrethroids .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for the protection of aquatic life from pyrethroids is one toxic unit. Individual pyrethroid concentrations in sediment were normalized to organic carbon content, divided by the respective LC50 and then summed. A sum over over one toxic unit is an exceedance of the evaluation guideline (Amweg et al. 2006).
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
310758
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
264745
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137545, Permethrin
Region 4
Malibu Creek
LOE ID:
310937
Pollutant:
Permethrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Permethrin. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The chronic criterion for permethrin is 1 ng/L (expressed as a 4-day average). If the freely dissolved concentrations of permethrin were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
265686
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
DECISION ID
137535
Region 4
Malibu Creek
Pollutant:
Pyrethroids
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
New Decision
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
251027
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Pyrethroids .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for the protection of aquatic life from pyrethroids is one toxic unit. Individual pyrethroid concentrations in sediment were normalized to organic carbon content, divided by the respective LC50 and then summed. A sum over over one toxic unit is an exceedance of the evaluation guideline (Amweg et al. 2006).
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
310758
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
265579
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
265670
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
265686
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
265691
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
265579
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
265670
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid phis is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
265488
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
265691
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
265668
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
310773
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
The samples were collected at 1 monitoring site: 404S11406 (Malibu Creek Site 11406).
Temporal Representation:
Data for this waterbody were collected over the date range 2009-05-11 to 2009-05-11
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
265488
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
265929
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
265668
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
310773
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
310775
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Pyrethroids.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
310759
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
310757
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
310775
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Pyrethroids.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
310759
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
310757
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pyrethroids. Although a total of 1 samples were collected, 1 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality threshold and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
310774
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Pyrethroids.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
250983
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Pyrethroids .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for the protection of aquatic life from pyrethroids is one toxic unit. Individual pyrethroid concentrations in sediment were normalized to organic carbon content, divided by the respective LC50 and then summed. A sum over over one toxic unit is an exceedance of the evaluation guideline (Amweg et al. 2006).
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
310774
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Pyrethroids.
The Water Quality Control Plan for the Los Angeles Region states that: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
The summed ratios of the pyrethroid pesticides bifenthrin, cyfluthrin, cypermethrin, esfenvalerate, lambda-cyhalothrin, permethrin and their respective chronic concentration goals are not to exceed 1. If the freely dissolved concentrations of these pesticides were reported or could be calculated then these values were used for this assessment. In the absence of freely dissolved concentrations, total concentrations were used.
Line of Evidence (LOE) for Decision ID 137535, Pyrethroids
Region 4
Malibu Creek
LOE ID:
250983
Pollutant:
Pyrethroids
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Pyrethroids .
No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in pesticide concentrations found in bottom sediments or aquatic life.
The evaluation guideline for the protection of aquatic life from pyrethroids is one toxic unit. Individual pyrethroid concentrations in sediment were normalized to organic carbon content, divided by the respective LC50 and then summed. A sum over over one toxic unit is an exceedance of the evaluation guideline (Amweg et al. 2006).
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 26 and 0 of 6 samples exceeded the criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137527, Silver
Region 4
Malibu Creek
LOE ID:
86330
Pollutant:
Silver
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Silver.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
California Toxics Rule (CTR) lists criterion maximum concentrations for silver to protect aquatic life in freshwater (1-hour average). The silver criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. If no hardness data were available, a value of 100 mg/L was used.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137527, Silver
Region 4
Malibu Creek
LOE ID:
86329
Pollutant:
Silver
L
DECISION ID
137527
Region 4
Malibu Creek
Pollutant:
Silver
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 26 and 0 of 6 samples exceeded the criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137527, Silver
Region 4
Malibu Creek
LOE ID:
86330
Pollutant:
Silver
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Silver.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Silver.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137527, Silver
Region 4
Malibu Creek
LOE ID:
266552
Pollutant:
Silver
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Silver.
The dissolved silver criterion maximum concentration (CMC) to protect aquatic life in freshwater is hardnesss dependent. The criterion when calculated using a default hardness of 100 mg/L is 3.4 ug/L. This criterion was divided by 2 in order to better represent a CMC value as specified in footnote (g) of Table (b)(1) of the California Toxics Rule, 2000.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
California Toxics Rule (CTR) lists criterion maximum concentrations for silver to protect aquatic life in freshwater (1-hour average). The silver criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. If no hardness data were available, a value of 100 mg/L was used.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137527, Silver
Region 4
Malibu Creek
LOE ID:
86329
Pollutant:
Silver
Lalign="top" width="33%">Evaluation Guideline:
Guideline Reference:
Spatial Representation:
The samples were collected at 1 monitoring site: 404S32468 (Malibu Creek (32468)).
Temporal Representation:
The samples were collected between the dates of 2012-06-26 and 2012-06-26
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137527, Silver
Region 4
Malibu Creek
LOE ID:
266068
Pollutant:
Silver
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Silver.
The dissolved silver criterion maximum concentration (CMC) to protect aquatic life in freshwater is hardnesss dependent. The criterion when calculated using a default hardness of 100 mg/L is 3.4 ug/L. This criterion was divided by 2 in order to better represent a CMC value as specified in footnote (g) of Table (b)(1) of the California Toxics Rule, 2000.
Line of Evidence (LOE) for Decision ID 137527, Silver
Region 4
Malibu Creek
LOE ID:
266678
Pollutant:
Silver
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Silver.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137527, Silver
Region 4
Malibu Creek
LOE ID:
266552
Pollutant:
Silver
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Silver.
The dissolved silver criterion maximum concentration (CMC) to protect aquatic life in freshwater is hardnesss dependent. The criterion when calculated using a default hardness of 100 mg/L is 3.4 ug/L. This criterion was divided by 2 in order to better represent a CMC value as specified in footnote (g) of Table (b)(1) of the California Toxics Rule, 2000.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Silver.
The dissolved silver criterion maximum concentration (CMC) to protect aquatic life in freshwater is hardnesss dependent. The criterion when calculated using a default hardness of 100 mg/L is 3.4 ug/L. This criterion was divided by 2 in order to better represent a CMC value as specified in footnote (g) of Table (b)(1) of the California Toxics Rule, 2000.
Line of Evidence (LOE) for Decision ID 137527, Silver
Region 4
Malibu Creek
LOE ID:
266631
Pollutant:
Silver
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Silver.
The dissolved silver criterion maximum concentration (CMC) to protect aquatic life in freshwater is hardnesss dependent. The criterion when calculated using a default hardness of 100 mg/L is 3.4 ug/L. This criterion was divided by 2 in order to better represent a CMC value as specified in footnote (g) of Table (b)(1) of the California Toxics Rule, 2000.
Line of Evidence (LOE) for Decision ID 137527, Silver
Region 4
Malibu Creek
LOE ID:
266068
Pollutant:
Silver
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Silver.
The dissolved silver criterion maximum concentration (CMC) to protect aquatic life in freshwater is hardnesss dependent. The criterion when calculated using a default hardness of 100 mg/L is 3.4 ug/L. This criterion was divided by 2 in order to better represent a CMC value as specified in footnote (g) of Table (b)(1) of the California Toxics Rule, 2000.
Line of Evidence (LOE) for Decision ID 137527, Silver
Region 4
Malibu Creek
LOE ID:
266678
Pollutant:
Silver
<_board/2003/ref476.pdf" >Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:
The samples were collected at 1 monitoring site: 404S13672 (Malibu Creek 13672).
Temporal Representation:
The samples were collected between the dates of 2011-06-08 and 2011-06-08
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137527, Silver
Region 4
Malibu Creek
LOE ID:
266632
Pollutant:
Silver
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Silver.
The dissolved silver criterion maximum concentration (CMC) to protect aquatic life in freshwater is hardnesss dependent. The criterion when calculated using a default hardness of 100 mg/L is 3.4 ug/L. This criterion was divided by 2 in order to better represent a CMC value as specified in footnote (g) of Table (b)(1) of the California Toxics Rule, 2000.
Line of Evidence (LOE) for Decision ID 137527, Silver
Region 4
Malibu Creek
LOE ID:
266338
Pollutant:
Silver
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Silver.
The dissolved silver criterion maximum concentration (CMC) to protect aquatic life in freshwater is hardnesss dependent. The criterion when calculated using a default hardness of 100 mg/L is 3.4 ug/L. This criterion was divided by 2 in order to better represent a CMC value as specified in footnote (g) of Table (b)(1) of the California Toxics Rule, 2000.
Line of Evidence (LOE) for Decision ID 137527, Silver
Region 4
Malibu Creek
LOE ID:
266340
Pollutant:
Silver
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Silver.
The dissolved silver criterion maximum concentration (CMC) to protect aquatic life in freshwater is hardnesss dependent. The criterion when calculated using a default hardness of 100 mg/L is 3.4 ug/L. This criterion was divided by 2 in order to better represent a CMC value as specified in footnote (g) of Table (b)(1) of the California Toxics Rule, 2000.
Line of Evidence (LOE) for Decision ID 137527, Silver
Region 4
Malibu Creek
LOE ID:
266090
Pollutant:
Silver
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Silver.
The dissolved silver criterion maximum concentration (CMC) to protect aquatic life in freshwater is hardnesss dependent. The criterion when calculated using a default hardness of 100 mg/L is 3.4 ug/L. This criterion was divided by 2 in order to better represent a CMC value as specified in footnote (g) of Table (b)(1) of the California Toxics Rule, 2000.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Silver.
The dissolved silver criterion maximum concentration (CMC) to protect aquatic life in freshwater is hardnesss dependent. The criterion when calculated using a default hardness of 100 mg/L is 3.4 ug/L. This criterion was divided by 2 in order to better represent a CMC value as specified in footnote (g) of Table (b)(1) of the California Toxics Rule, 2000.
Line of Evidence (LOE) for Decision ID 137527, Silver
Region 4
Malibu Creek
LOE ID:
266631
Pollutant:
Silver
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Silver.
The dissolved silver criterion maximum concentration (CMC) to protect aquatic life in freshwater is hardnesss dependent. The criterion when calculated using a default hardness of 100 mg/L is 3.4 ug/L. This criterion was divided by 2 in order to better represent a CMC value as specified in footnote (g) of Table (b)(1) of the California Toxics Rule, 2000.
Line of Evidence (LOE) for Decision ID 137527, Silver
Region 4
Malibu Creek
LOE ID:
266632
Pollutant:
Silver
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Silver.
The dissolved silver criterion maximum concentration (CMC) to protect aquatic life in freshwater is hardnesss dependent. The criterion when calculated using a default hardness of 100 mg/L is 3.4 ug/L. This criterion was divided by 2 in order to better represent a CMC value as specified in footnote (g) of Table (b)(1) of the California Toxics Rule, 2000.
Line of Evidence (LOE) for Decision ID 137527, Silver
Region 4
Malibu Creek
LOE ID:
266338
Pollutant:
Silver
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Silver.
The dissolved silver criterion maximum concentration (CMC) to protect aquatic life in freshwater is hardnesss dependent. The criterion when calculated using a default hardness of 100 mg/L is 3.4 ug/L. This criterion was divided by 2 in order to better represent a CMC value as specified in footnote (g) of Table (b)(1) of the California Toxics Rule, 2000.
Line of Evidence (LOE) for Decision ID 137527, Silver
Region 4
Malibu Creek
LOE ID:
266340
Pollutant:
Silver
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Silver.
The dissolved silver criterion maximum concentration (CMC) to protect aquatic life in freshwater is hardnesss dependent. The criterion when calculated using a default hardness of 100 mg/L is 3.4 ug/L. This criterion was divided by 2 in order to better represent a CMC value as specified in footnote (g) of Table (b)(1) of the California Toxics Rule, 2000.
Line of Evidence (LOE) for Decision ID 137527, Silver
Region 4
Malibu Creek
LOE ID:
266090
Pollutant:
Silver
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Silver.
The dissolved silver criterion maximum concentration (CMC) to protect aquatic life in freshwater is hardnesss dependent. The criterion when calculated using a default hardness of 100 mg/L is 3.4 ug/L. This criterion was divided by 2 in order to better represent a CMC value as specified in footnote (g) of Table (b)(1) of the California Toxics Rule, 2000.
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.
19 lines of evidence are available in the administrative record to assess this pollutant. The fractions "none" and "not recorded" will be manually summed for each beneficial use because they are equivalent. 0 of 40 samples exceed the warm freshwater habitat objective. 217 of 1363 samples exceeded the cold freshwater objective.
The objective for COLD was inappropriately applied to the MIGR and SPWN beneficial use. The LOEs for COLD and SPWN will not be considered.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 40 and 217 of 1363 samples exceeded the objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
266938
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 16 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region (page 3-45) states that: For waters designated WARM, water temperature shall not be altered by more than 5 °F above the natural temperature. At no time shall these WARM-designated waters be raised above 80 °F as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267036
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region (page 3-45) states that: For waters designated WARM, water temperature shall not be altered by more than 5 °F above the natural temperature. At no time shall these WARM-designated waters be raised above 80 °F as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267070
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Migration
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267050
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Migration
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.
19 lines of evidence are available in the administrative record to assess this pollutant. The fractions "none" and "not recorded" will be manually summed for each beneficial use because they are equivalent. 0 of 40 samples exceed the warm freshwater habitat objective. 217 of 1363 samples exceeded the cold freshwater objective.
The objective for COLD was inappropriately applied to the MIGR and SPWN beneficial use. The LOEs for COLD and SPWN will not be considered.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 40 and 217 of 1363 samples exceeded the objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
266938
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 16 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region (page 3-45) states that: For waters designated WARM, water temperature shall not be altered by more than 5 °F above the natural temperature. At no time shall these WARM-designated waters be raised above 80 °F as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267036
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region (page 3-45) states that: For waters designated WARM, water temperature shall not be altered by more than 5 °F above the natural temperature. At no time shall these WARM-designated waters be raised above 80 °F as a result of waste discharges.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267325
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Migration
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267050
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Migration
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Lidth="100%" cellspacing="0" cellpadding="0">
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267313
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Migration
Number of Samples:
16
Number of Exceedances:
4
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 4 of 16 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
266924
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267325
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Migration
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
The Water Quality Control Plan for the Los Angeles Region (page 3-45) states that: For waters designated WARM, water temperature shall not be altered by more than 5 °F above the natural temperature. At no time shall these WARM-designated waters be raised above 80 °F as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
266891
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 16 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region (page 3-45) states that: For waters designated WARM, water temperature shall not be altered by more than 5 °F above the natural temperature. At no time shall these WARM-designated waters be raised above 80 °F as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267313
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Migration
Number of Samples:
16
Number of Exceedances:
4
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 4 of 16 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
266924
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267267
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Migration
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267168
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Migration
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
86353
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Water Temperature.
For waters designated WARM, water temperature shall not be altered by more than 5 deg. F above the natural temperature. At no time shall these WARM-designated waters be raised above 80 deg. F as a result of waste discharges.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
The Water Quality Control Plan for the Los Angeles Region (page 3-45) states that: For waters designated WARM, water temperature shall not be altered by more than 5 °F above the natural temperature. At no time shall these WARM-designated waters be raised above 80 °F as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
266891
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 16 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region (page 3-45) states that: For waters designated WARM, water temperature shall not be altered by more than 5 °F above the natural temperature. At no time shall these WARM-designated waters be raised above 80 °F as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267267
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Migration
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267168
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Migration
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
86352
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 2 samples exceed the criterion for Water Temperature.
The Basin Plan states that the natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses. Alterations for waters designated COLD shall not be altered by more than 5 degrees Fahrenheit above the natural temperature.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
86353
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Water Temperature.
For waters designated WARM, water temperature shall not be altered by more than 5 deg. F above the natural temperature. At no time shall these WARM-designated waters be raised above 80 deg. F as a result of waste discharges.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Samples were collected at 7 sites along Malibu Creek.
Temporal Representation:
Samples were collected between 1/5/2000 and 12/2/2009.
Environmental Conditions:
QAPP Information:
Quality Assurance Project Plan for Malibu Creek Watershed Monitoring Program Version 3, City of Calabasas, November 16, 2004 SUBMITTED BY JIM MEDLEN, WATER MONITORING CONSULTANT FOR THE CITY OF CALABASAS
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267105
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Migration
Number of Samples:
16
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 16 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
The samples were collected at 1 monitoring site: WQ_MC_MALIBU (Malibu Creek Malibu).
Temporal Representation:
The samples were collected between the dates of 2017-09-26 and 2019-03-05
Environmental Conditions:
QAPP Information:
Los Angeles Regional Water Quality Control Board. 2016. Coordinated Integrated Monitoring Program for Malibu Creek Watershed.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
86352
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 2 samples exceed the criterion for Water Temperature.
The Basin Plan states that the natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses. Alterations for waters designated COLD shall not be altered by more than 5 degrees Fahrenheit above the natural temperature.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
86367
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1323
Number of Exceedances:
211
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
There were 1323 temperature samples included in this data set. Of these, 211 exceeded the evaluation guideline.
Coordinated Integrated Monitoring Program
for Malibu Creek Watershed
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267269
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Migration
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Samples were collected at 7 sites along Malibu Creek.
Temporal Representation:
Samples were collected between 1/5/2000 and 12/2/2009.
Environmental Conditions:
QAPP Information:
Quality Assurance Project Plan for Malibu Creek Watershed Monitoring Program Version 3, City of Calabasas, November 16, 2004 SUBMITTED BY JIM MEDLEN, WATER MONITORING CONSULTANT FOR THE CITY OF CALABASAS
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267105
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Migration
Number of Samples:
16
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 16 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
266723
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Spawning
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
The samples were collected at 1 monitoring site: 404S32468 (Malibu Creek (32468)).
Temporal Representation:
Coordinated Integrated Monitoring Program
for Malibu Creek Watershed
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267269
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Migration
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
266722
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Spawning
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267115
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
266723
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Spawning
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
The samples were collected at 1 monitoring site: 404S32468 (Malibu Creek (32468)).
Temporal Representation:
Not Recorded
Beneficial Use:
Fish Spawning
Number of Samples:
16
Number of Exceedances:
4
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 4 of 16 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267103
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Spawning
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for grow valign="top" width="67%">The samples were collected between the dates of 2012-06-26 and 2012-06-26
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
266722
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Spawning
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
266894
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Spawning
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
Not Recorded
Beneficial Use:
Fish Spawning
Number of Samples:
16
Number of Exceedances:
4
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 4 of 16 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267103
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Spawning
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growe>
LOE ID:
266702
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Spawning
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267086
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Spawning
Number of Samples:
16
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 16 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving wath and completion of most life stages is 13-21 degrees C (page 129).
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
266894
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Spawning
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267063
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267086
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Fish Spawning
Number of Samples:
16
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 16 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving wald; PADDING-BOTTOM: 3px; WIDTH: 100%; text-align: left; PADDING-TOP: 3px; font-smooth: always">Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267226
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267121
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
266821
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
The samples were collected at 1 monitoring site: 404S13672 (Malibu Creek 13672).
Temporal Representation:
The samples were collected between the dates of 2011-06-08 and 2011-06-08
Environmental Conditions:
QAPP Information:
SWRCB. 2018. ter temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267063
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267226
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267121
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267109
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
266821
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
The samples were collected at 1 monitoring site: 404S13672 (Malibu Creek 13672).
Temporal Representation:
The samples were collected between the dates of 2011-06-08 and 2011-06-08
Environmental Conditions:
QAPP Information:
SWRCB. 2018. gn="left" valign="top" width="33%">Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267042
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region (page 3-45) states that: For waters designated WARM, water temperature shall not be altered by more than 5 °F above the natural temperature. At no time shall these WARM-designated waters be raised above 80 °F as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267109
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267136
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region (page 3-45) states that: For waters designated WARM, water temperature shall not be altered by more than 5 °F above the natural temperature. At no time shall these WARM-designated waters be raised above 80 °F as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267242
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number ofgn="left" valign="top" width="33%">Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267042
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region (page 3-45) states that: For waters designated WARM, water temperature shall not be altered by more than 5 °F above the natural temperature. At no time shall these WARM-designated waters be raised above 80 °F as a result of waste discharges.
The samples were collected at 1 monitoring site: 404R4S036 (Malibu Creek downstream of Malibu Canyon Rd, (1st) tunnel).
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region (page 3-45) states that: For waters designated WARM, water temperature shall not be altered by more than 5 °F above the natural temperature. At no time shall these WARM-designated waters be raised above 80 °F as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
266758
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region (page 3-45) states that: For waters designated WARM, water temperature shall not be altered by more than 5 °F above the natural temperature. At no time shall these WARM-designated waters be raised above 80 °F as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267136
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region (page 3-45) states that: For waters designated WARM, water temperature shall not be altered by more than 5 °F above the natural temperature. At no time shall these WARM-designated waters be raised above 80 °F as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267285
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
4
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 4 of 16 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267191
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 16 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region (page 3-45) states that: For waters designated WARM, water temperature shall not be altered by more than 5 °F above the natural temperature. At no time shall these WARM-designated waters be raised above 80 °F as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
266758
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region (page 3-45) states that: For waters designated WARM, water temperature shall not be altered by more than 5 °F above the natural temperature. At no time shall these WARM-designated waters be raised above 80 °F as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267285
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
4
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 4 of 16 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Line of Evidence (LOE) for Decision ID 137529, Temperature, water
Region 4
Malibu Creek
LOE ID:
267191
Pollutant:
Temperature, water
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 16 samples exceeded the water quality threshold for Temperature.
The Water Quality Control Plan for the Los Angeles Region states that: The natural receiving water temperature of all regional waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses.
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137530, Thallium
Region 4
Malibu Creek
LOE ID:
252891
Pollutant:
Thallium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Thallium.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA Quality Criteria for Water (Gold Book) states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,600 hours of exposure. (USEPA, 1986)
Line of Evidence (LOE) for Decision ID 137530, Thallium
Region 4
Malibu Creek
LOE ID:
252893
Pollutant:
Thallium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Thallium.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA Quality Criteria for Water (Gold Book) states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,600 hours of exposure. (USEPA, 1986)
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137530, Thallium
Region 4
Malibu Creek
LOE ID:
252891
Pollutant:
Thallium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Thallium.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA Quality Criteria for Water (Gold Book) states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,600 hours of exposure. (USEPA, 1986)
Line of Evidence (LOE) for Decision ID 137530, Thallium
Region 4
Malibu Creek
LOE ID:
252893
Pollutant:
Thallium
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Thallium.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The USEPA Quality Criteria for Water (Gold Book) states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,600 hours of exposure. (USEPA, 1986)
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.
3 lines of evidence are available in the administrative record to assess this pollutant. 0 of the 2 samples exceed the OBJECTIVE. 1 of the 59 samples exceed the OBJECTIVE. 0 of the 2 samples exceed the OBJECTIVE.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 2, 1 of 59 and 0 of 2 samples exceeded the OBJECTIVE and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137531, Total Dissolved Solids
Region 4
Malibu Creek
LOE ID:
244084
Pollutant:
Total Dissolved Solids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Tapia Water Reclamation Facility to determine beneficial use support. The results are as follows: Zero out of 16 samples exceed the criterion for Total Dissolved Solids.
Station WQ_MC_TAPIA (34.0786116, -118.7011975), located in Malibu Creek.
Temporal Representation:
Water samples were taken from 8/23/2017 to 3/5/2019 for the Water Quality Monitoring in the Malibu Creek Water.
Environmental Conditions:
QAPP Information:
The work was performed in accordance with the quality control and quality assurance provisions of the Coordinated Integrated Monitoring Program for Malibu Creek Watershed.
Line of Evidence (LOE) for Decision ID 137531, Total Dissolved Solids
Region 4
Malibu Creek
LOE ID:
243966
Pollutant:
Total Dissolved Solids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Los Angeles County MS4 Permit to determine beneficial use support. The results are as follows: 0 out of 2 samples exceed the criterion for Total Dissolved Solids.
Station S02 (34.07611, -118.702206), located in Malibu Creek @ Piuma Road mass emission station.
Temporal Representation:
The water samples were taken between 8/31/2015 - 1/7/2016, per the monitoring requirements listed in the Los Angeles County Municipal Separate Storm Sewer Permit.
Environmental Conditions:
QAPP Information:
The work was performed in accordance with the provisions of the Los Angeles Municipal Separate Storm Sewer System quality control and quality assurance procedures listed in coordinated integrated monitoring plan.
Line of Evidence (LOE) for Decision ID 137531, Total Dissolved Solids
Region 4
Malibu Creek
LOE ID:
244035
Pollutant:
Total Dissolved Solids
LOE Subgroup:
Pollutant-Water
DECISION ID
137531
Region 4
Malibu Creek
Pollutant:
Total Dissolved Solids
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.
3 lines of evidence are available in the administrative record to assess this pollutant. 0 of the 2 samples exceed the OBJECTIVE. 1 of the 59 samples exceed the OBJECTIVE. 0 of the 2 samples exceed the OBJECTIVE.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 2, 1 of 59 and 0 of 2 samples exceeded the OBJECTIVE and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137531, Total Dissolved Solids
Region 4
Malibu Creek
LOE ID:
244084
Pollutant:
Total Dissolved Solids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Tapia Water Reclamation Facility to determine beneficial use support. The results are as follows: Zero out of 16 samples exceed the criterion for Total Dissolved Solids.
Station WQ_MC_TAPIA (34.0786116, -118.7011975), located in Malibu Creek.
Temporal Representation:
Water samples were taken from 8/23/2017 to 3/5/2019 for the Water Quality Monitoring in the Malibu Creek Water.
Environmental Conditions:
QAPP Information:
The work was performed in accordance with the quality control and quality assurance provisions of the Coordinated Integrated Monitoring Program for Malibu Creek Watershed.
Line of Evidence (LOE) for Decision ID 137531, Total Dissolved Solids
Region 4
Malibu Creek
LOE ID:
243966
Pollutant:
Total Dissolved Solids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Los Angeles County MS4 Permit to determine beneficial use support. The results are as follows: 0 out of 2 samples exceed the criterion for Total Dissolved Solids.
Station S02 (34.07611, -118.702206), located in Malibu Creek @ Piuma Road mass emission station.
Temporal Representation:
The water samples were taken between 8/31/2015 - 1/7/2016, per the monitoring requirements listed in the Los Angeles County Municipal Separate Storm Sewer Permit.
Environmental Conditions:
QAPP Information:
The work was performed in accordance with the provisions of the Los Angeles Municipal Separate Storm Sewer System quality control and quality assurance procedures listed in coordinated integrated monitoring plan.
Line of Evidence (LOE) for Decision ID 137531, Total Dissolved Solids
Region 4
Malibu Creek
LOE ID:
244035
Pollutant:
Total Dissolved Solids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Total Dissolved Solids.
The sample was collected from the Malibu Creek Site 11406 station (404S11406).
Temporal Representation:
The sample was collected on 5/11/2009.
Environmental Conditions:
QAPP Information:
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: one out of one samples exceed the criterion for Total Dissolved Solids.
The sample was collected from the Malibu Creek Site 11406 station (404S11406).
Temporal Representation:
The sample was collected on 5/11/2009.
Environmental Conditions:
QAPP Information:
SWAMP QAPP
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137531, Total Dissolved Solids
Region 4
Malibu Creek
LOE ID:
244173
Pollutant:
Total Dissolved Solids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: zero out of one samples exceed the criterion for Total Dissolved Solids.
Line of Evidence (LOE) for Decision ID 137531, Total Dissolved Solids
Region 4
Malibu Creek
LOE ID:
244076
Pollutant:
Total Dissolved Solids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: zero out of one samples exceed the criterion for Total Dissolved Solids.
Line of Evidence (LOE) for Decision ID 137531, Total Dissolved Solids
Region 4
Malibu Creek
LOE ID:
86370
Pollutant:
Total Dissolved Solids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Dissolved Solids.
Table 3-8 of The Water Quality Control Plan for the Los Angeles Region specifies the Dissolved Solids objective for the Malibu Creek within the Malibu Creek watershed as 2000 mg/L.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137531, Total Dissolved Solids
Region 4
SWAMP QAPP
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137531, Total Dissolved Solids
Region 4
Malibu Creek
LOE ID:
244173
Pollutant:
Total Dissolved Solids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: zero out of one samples exceed the criterion for Total Dissolved Solids.
Line of Evidence (LOE) for Decision ID 137531, Total Dissolved Solids
Region 4
Malibu Creek
LOE ID:
244076
Pollutant:
Total Dissolved Solids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Southern California Stormwater Monitoring Coalition to determine beneficial use support. The results are as follows: zero out of one samples exceed the criterion for Total Dissolved Solids.
Line of Evidence (LOE) for Decision ID 137531, Total Dissolved Solids
Region 4
Malibu Creek
LOE ID:
86370
Pollutant:
Total Dissolved Solids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Dissolved Solids.
Table 3-8 of The Water Quality Control Plan for the Los Angeles Region specifies the Dissolved Solids objective for the Malibu Creek within the Malibu Creek watershed as 2000 mg/L.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137531, Total Dissolved Solids
Region 4
Malibu Creek
LOE ID:
86369
Pollutant:
Total Dissolved Solids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Dissolved Solids.
Table 3-8 of The Water Quality Control Plan for the Los Angeles Region specifies the Dissolved Solids objective for the Malibu Creek within the Malibu Creek watershed as 2000 mg/L.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137531, Total Dissolved Solids
Region 4
Malibu Creek
LOE ID:
2247
Pollutant:
Total Dissolved Solids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Numeric data generated from 20 samples taken from 10/28/00 to 4/30/03 at one to two-week sampling interval. No sample exceeded the site specific objective. (LACDPW, 2004c).
Basin Plan Water Quality Objective of 2000 mg/l. The Numeric WQO was adopted as a site specific objective for Malibu Creek Watershed (Basin Plan Table 3-8) for the protection of agricultural water supply.
One sample site sampled during the dry and wet season beginning from 10/28/00 through 4/30/03 at approximately one to two week intervals.
Temporal Representation:
Twenty (20) samples where taken during the wet and dry season from 10/28/00 to 4/30/03 at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions:
The Malibu Creek monitoring station is located at the existing stream gage station (Stream Gage No. F130-9-R) near Malibu Canyon Road, south of Piuma Road. At this location, the tributary watershed to Malibu Creek is 104.9 square miles. The entire Malibu Creek Watershed is 109.9 square miles.
QAPP Information:
Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137531, Total Dissolved Solids
Region 4
Malibu Creek
LOE ID:
86371
Pollutant:
Total Dissolved Solids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
The sample collected did not exceed the objective.
The sample was collected from the Malibu Creek Random Site 104 station (404BA0104).
Temporal Representation:
The sample was collected on 6/18/2008.
Environmental Conditions:
QAPP Information:
SWAMP QAPP
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137531, Total Dissolved Solids
Region 4
Malibu Creek
LOE ID:
244083
Pollutant:
Total Dissolved Solids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Tapia Water Reclamation Facility to determine beneficial use support. The results are as follows: Zero out of 16 samples exceed the criterion for Total Dissolved Solids.
Station WQ_MC_MALIBU (34.0429298, -118.6841708), located in Malibu Creek.
Temporal Representation:
Water samples were taken from 9/26/2017 to 3/5/2019 for the Water Quality Monitoring in the Malibu Creek Water.
Environmental Conditions:
QAPP Information:
The work was performed in accordance with the quality control and quality assurance provisions of the Coordinated Integrated Monitoring Program for Malibu Creek Watershed.
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Dissolved Solids.
Table 3-8 of The Water Quality Control Plan for the Los Angeles Region specifies the Dissolved Solids objective for the Malibu Creek within the Malibu Creek watershed as 2000 mg/L.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137531, Total Dissolved Solids
Region 4
Malibu Creek
LOE ID:
2247
Pollutant:
Total Dissolved Solids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Numeric data generated from 20 samples taken from 10/28/00 to 4/30/03 at one to two-week sampling interval. No sample exceeded the site specific objective. (LACDPW, 2004c).
Basin Plan Water Quality Objective of 2000 mg/l. The Numeric WQO was adopted as a site specific objective for Malibu Creek Watershed (Basin Plan Table 3-8) for the protection of agricultural water supply.
One sample site sampled during the dry and wet season beginning from 10/28/00 through 4/30/03 at approximately one to two week intervals.
Temporal Representation:
Twenty (20) samples where taken during the wet and dry season from 10/28/00 to 4/30/03 at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions:
The Malibu Creek monitoring station is located at the existing stream gage station (Stream Gage No. F130-9-R) near Malibu Canyon Road, south of Piuma Road. At this location, the tributary watershed to Malibu Creek is 104.9 square miles. The entire Malibu Creek Watershed is 109.9 square miles.
QAPP Information:
Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137531, Total Dissolved Solids
Region 4
Malibu Creek
LOE ID:
86371
Pollutant:
Total Dissolved Solids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
The sample collected did not exceed the objective.
The sample was collected from the Malibu Creek Random Site 104 station (404BA0104).
Temporal Representation:
The sample was collected on 6/18/2008.
Environmental Conditions:
QAPP Information:
SWAMP QAPP
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137531, Total Dissolved Solids
Region 4
Malibu Creek
LOE ID:
244083
Pollutant:
Total Dissolved Solids
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed data from the Tapia Water Reclamation Facility to determine beneficial use support. The results are as follows: Zero out of 16 samples exceed the criterion for Total Dissolved Solids.
Station WQ_MC_MALIBU (34.0429298, -118.6841708), located in Malibu Creek.
Temporal Representation:
Water samples were taken from 9/26/2017 to 3/5/2019 for the Water Quality Monitoring in the Malibu Creek Water.
Environmental Conditions:
QAPP Information:
The work was performed in accordance with the quality control and quality assurance provisions of the Coordinated Integrated Monitoring Program for Malibu Creek Watershed.
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
267829
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 40 NTU or greater can cause a reduced foraging efficiency and a shift in prey selection in piscivorous fish (largemouth bass) due to interference with their ability to find prey (Shoup, D.E. and Wahl D.H., 2009).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
268269
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 25 NTU or greater can cause a reduction in juvenile salmonid growth due to interference with their ability to find food (Sigler et al. 1984).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
267907
Pollutant:
<
DECISION ID
137533
Region 4
Malibu Creek
Pollutant:
Turbidity
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
New Decision
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
267829
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 40 NTU or greater can cause a reduced foraging efficiency and a shift in prey selection in piscivorous fish (largemouth bass) due to interference with their ability to find prey (Shoup, D.E. and Wahl D.H., 2009).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
268269
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 25 NTU or greater can cause a reduction in juvenile salmonid growth due to interference with their ability to find food (Sigler et al. 1984).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
267907
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 25 NTU or greater can cause a reduction in juvenile salmonid growth due to interference with their ability to find food (Sigler et al. 1984).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
268095
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 25 NTU or greater can cause a reduction in juvenile salmonid growth due to interference with their ability to find food (Sigler et al. 1984).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
267929
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 25 NTU or greater can cause a reduction in juvenile salmonid growth due to interference with their ability to find food (Sigler et al. 1984).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 25 NTU or greater can cause a reduction in juvenile salmonid growth due to interference with their ability to find food (Sigler et al. 1984).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
268095
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 25 NTU or greater can cause a reduction in juvenile salmonid growth due to interference with their ability to find food (Sigler et al. 1984).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
267929
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 25 NTU or greater can cause a reduction in juvenile salmonid growth due to interference with their ability to find food (Sigler et al. 1984).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
252877
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
18
Number of Exceedances:
4
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 4 of 18 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 25 NTU or greater can cause a reduction in juvenile salmonid growth due to interference with their ability to find food (Sigler et al. 1984).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
268209
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 25 NTU or greater can cause a reduction in juvenile salmonid growth due to interference with their ability to find food (Sigler et al. 1984).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
252851
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
18
Number of Exceedances:
3
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 3 of 18 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 40 NTU or greater can cause a reduced foraging efficiency and a shift in prey selection in piscivorous fish (largemouth bass) due to interference with their ability to find prey (Shoup, D.E. and Wahl D.H., 2009).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
252877
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
18
Number of Exceedances:
4
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 4 of 18 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 25 NTU or greater can cause a reduction in juvenile salmonid growth due to interference with their ability to find food (Sigler et al. 1984).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
268209
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for v style="background-color:#CCCCCC; PADDING-RIGHT: 2%; PADDING-LEFT: 0%; FONT-WEIGHT: bold; PADDING-BOTTOM: 3px; WIDTH: 100%; text-align: right; PADDING-TOP: 3px; font-smooth: always">Region 4
Malibu Creek
LOE ID:
267832
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 40 NTU or greater can cause a reduced foraging efficiency and a shift in prey selection in piscivorous fish (largemouth bass) due to interference with their ability to find prey (Shoup, D.E. and Wahl D.H., 2009).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
267928
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
Turbidities of 25 NTU or greater can cause a reduction in juvenile salmonid growth due to interference with their ability to find food (Sigler et al. 1984).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
252851
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
18
Number of Exceedances:
3
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 3 of 18 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 40 NTU or greater can cause a reduced foraging efficiency and a shift in prey selection in piscivorous fish (largemouth bass) due to interference with their ability to find prey (Shoup, D.E. and Wahl D.H., 2009).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
267832
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 40 NTU or greater can cause a reduced foraging efficiency and a shift in prey selection in piscivorous fish (largemouth bass) due to interference with their ability to find prey (Shoup, D.E. and Wahl D.H., 2009).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
267928
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 40 NTU or greater can cause a reduced foraging efficiency and a shift in prey selection in piscivorous fish (largemouth bass) due to interference with their ability to find prey (Shoup, D.E. and Wahl D.H., 2009).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
267887
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 40 NTU or greater can cause a reduced foraging efficiency and a shift in prey selection in piscivorous fish (largemouth bass) due to interference with their ability to find prey (Shoup, D.E. and Wahl D.H., 2009).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
267890
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 40 NTU or greater can cause a reduced foraging efficiency and a shift in prey selection in piscivorous fish (largemouth bass) due to interference with their ability to find prey (Shoup, D.E. and Wahl D.H., 2009).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
268111
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 25 NTU or greater can cause a reduction in juvenile salmonid growth due to interference with their ability to find food (Sigler et al. 1984).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
267888
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 40 NTU or greater can cause a reduced foraging efficiency and a shift in prey selection in piscivorous fish (largemouth bass) due to interference with their ability to find prey (Shoup, D.E. and Wahl D.H., 2009).
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 40 NTU or greater can cause a reduced foraging efficiency and a shift in prey selection in piscivorous fish (largemouth bass) due to interference with their ability to find prey (Shoup, D.E. and Wahl D.H., 2009).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
267887
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 40 NTU or greater can cause a reduced foraging efficiency and a shift in prey selection in piscivorous fish (largemouth bass) due to interference with their ability to find prey (Shoup, D.E. and Wahl D.H., 2009).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
267890
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 40 NTU or greater can cause a reduced foraging efficiency and a shift in prey selection in piscivorous fish (largemouth bass) due to interference with their ability to find prey (Shoup, D.E. and Wahl D.H., 2009).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
268111
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 25 NTU or greater can cause a reduction in juvenile salmonid growth due to interference with their ability to find food (Sigler et al. 1984).
Line of Evidence (LOE) for Decision ID 137533, Turbidity
Region 4
Malibu Creek
LOE ID:
267888
Pollutant:
Turbidity
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Turbidity.
The Water Quality Control Plan for the Los Angeles Region states that: Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses.
Turbidities of 40 NTU or greater can cause a reduced foraging efficiency and a shift in prey selection in piscivorous fish (largemouth bass) due to interference with their ability to find prey (Shoup, D.E. and Wahl D.H., 2009).
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 8, 0 of 36and 0 of 0 exceeded the criteria for zinc in water and 0 of 4 and 0 of 4 samples exceeded the guideline for zinc in sediment and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
251557
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Zinc .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
251218
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Zinc .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137534, Zinc
DECISION ID
137534
Region 4
Malibu Creek
Pollutant:
Zinc
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 8, 0 of 36and 0 of 0 exceeded the criteria for zinc in water and 0 of 4 and 0 of 4 samples exceeded the guideline for zinc in sediment and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
251557
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Zinc .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
251218
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Zinc .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
268046
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Zinc.
The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 120 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
268089
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Zinc.
The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 120 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
268002
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Zinc.
The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 120 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
268046
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Zinc.
The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 120 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
268089
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Zinc.
The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 120 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
268002
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Zinc.
The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 120 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
268518
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Zinc.
The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 120 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
251619
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Zinc .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
251628
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Zinc .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
251524
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Zinc .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
251360
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Zinc .
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Zinc.
The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 120 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
251619
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Zinc .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
251628
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Zinc .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
252922
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Zinc.
The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 120 ug/L (California Toxics Rule, 2000).
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Zinc .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
251360
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Zinc .
state_board/2021/ref5781.pdf" >Municipal Separate Storm Sewer System (MS4)
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
268024
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Zinc.
The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 120 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
268068
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Zinc.
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
252922
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Zinc.
The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 120 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
268024
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Zinc.
The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 120 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
268068
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Zinc.
The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 120 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
268488
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Zinc.
The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 120 ug/L (California Toxics Rule, 2000).
The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 120 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
268488
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Zinc.
The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 120 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
86394
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Zinc.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
86393
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Zinc.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. If no hardness data were available, a value of 100 mg/L was used.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
86394
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Zinc.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
86393
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Zinc.
California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. If no hardness data were available, a value of 100 mg/L was used.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
2252
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Numeric data generated from 20 samples taken from 10/28/00 to 4/30/03 at one to two-week sampling interval. No samples exceeded the any guideline for total zinc. (LACDPW, 2004c).
One sample site sampled during the dry and wet season beginning from 10/28/00 through 4/30/03 at approximately one to two week intervals.
Temporal Representation:
Twenty (20) samples where taken during the wet and dry season from 10/12/00 to 4/30/03 at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions:
The Malibu Creek monitoring station is located at the existing stream gage station (Stream Gage No. F130-9-R) near Malibu Canyon Road, south of Piuma Road. At this location, the tributary watershed to Malibu Creek is 104.9 square miles. The entire Malibu Creek Watershed is 109.9 square miles.
QAPP Information:
Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
268415
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Zinc.
The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 120 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
251264
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Zinc .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
251621
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Zinc .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
253102
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Zinc.
The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 120 ug/L (California Toxics Rule, 2000).
: 3px; font-smooth: always">Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
2252
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Numeric data generated from 20 samples taken from 10/28/00 to 4/30/03 at one to two-week sampling interval. No samples exceeded the any guideline for total zinc. (LACDPW, 2004c).
One sample site sampled during the dry and wet season beginning from 10/28/00 through 4/30/03 at approximately one to two week intervals.
Temporal Representation:
Twenty (20) samples where taken during the wet and dry season from 10/12/00 to 4/30/03 at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions:
The Malibu Creek monitoring station is located at the existing stream gage station (Stream Gage No. F130-9-R) near Malibu Canyon Road, south of Piuma Road. At this location, the tributary watershed to Malibu Creek is 104.9 square miles. The entire Malibu Creek Watershed is 109.9 square miles.
QAPP Information:
Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
268415
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Zinc.
The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 120 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
251264
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Zinc .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
251621
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Sediment
Matrix:
Sediment
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Zinc .
All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Line of Evidence (LOE) for Decision ID 137534, Zinc
Region 4
Malibu Creek
LOE ID:
253102
Pollutant:
Zinc
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Zinc.
The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 120 ug/L (California Toxics Rule, 2000).
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 40, 0 of 2, 0 of 95 and 0 of 2 samples exceeded the OBJECTIVE and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137525, pH
Region 4
Malibu Creek
LOE ID:
86313
Pollutant:
pH
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for insland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 40, 0 of 2, 0 of 95 and 0 of 2 samples exceeded the OBJECTIVE and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137525, pH
Region 4
Malibu Creek
LOE ID:
86313
Pollutant:
pH
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for insland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for insland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Samples were collected from the J_MALICRKL, J_MALICRKU, Malibu Creek R1 (g), Malibu Creek R1 Chronic Bioassay (g), Malibu Creek R1 CTR (g), Malibu Creek R1 Filtered Res. (g), Malibu Creek R13 (g), Malibu Creek R2 (g), Malibu Creek R3, Malibu Creek R3 (g), Malibu Creek R4 (g), Malibu Creek R9 (g), R-1, and S02 stations.
Temporal Representation:
Samples were collected approximately once a week from October 2000 to March 2010.
Environmental Conditions:
QAPP Information:
NPDES quality assurance.
QAPP Information Reference(s):
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for insland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Samples were collected from the J_MALICRKL, J_MALICRKU, Malibu Creek R1 (g), Malibu Creek R1 Chronic Bioassay (g), Malibu Creek R1 CTR (g), Malibu Creek R1 Filtered Res. (g), Malibu Creek R13 (g), Malibu Creek R2 (g), Malibu Creek R3, Malibu Creek R3 (g), Malibu Creek R4 (g), Malibu Creek R9 (g), R-1, and S02 stations.
Temporal Representation:
Samples were collected approximately once a week from October 2000 to March 2010.
Environmental Conditions:
QAPP Information:
NPDES quality assurance.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137525, pH
Region 4
Malibu Creek
LOE ID:
86300
Pollutant:
pH
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
None
Beneficial Use:
Water Contact Recreation
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for insland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for insland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 16 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 16 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 16 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
The samples were collected at 1 monitoring site: 404S25298 (Malibu Creek (25298)).
Temporal Representation:
The samples were collected between the dates of 2012-06-20 and 2012-06-20
Environmental Conditions:
QAPP Information:
SWRCB. 2018. This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.
QAPP Information Reference(s):
16
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 16 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 16 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 16 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 16 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for insland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 16 samples exceeded the water quality threshold for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for inland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for pH.
Water Quality Control Plan, Los Angeles Basin: the pH for insland surface waters, bays, or estuaries shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Sources:
A Source Unknown
TMDL Priority:
Low
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
During the 2024 cycle, the 1988 National Recommended Water Quality Criteria used to assess aluminum data was replaced with U.S. EPA’s 2018 Final Recommended Aquatic Life Criteria for Aluminum in Freshwater.
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence are necessary to assess listing status.
Thirty-three lines of evidence are available in the administrative record to assess this pollutant. LOEs 86324, 86325 and 86326 were replaced due to reassessment using the 2018 USEPA aluminum criteria.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Eight of 28 and 8 of 28 samples exceeded the criteria and this exceeds the allowable frequency stated by Table 3.1 of the Listing Policy. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314868
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314958
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314836
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314839
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314965
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314680
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
315063
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
315000
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314686
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 2 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314960
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
7
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Los Angeles County Flood Control District_2010 data for Malibu Creek to determine beneficial use support and results are as follows: 7 of 20 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314964
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314818
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314901
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
The Malibu Creek monitoring station is located at the existing stream gauge station (Stream Gauge No. F130-9-R) near Malibu Canyon Road, south of Piuma Road. At this location, the tributary watershed to Malibu Creek is 104.9 square miles. The entire Malibu Creek Watershed is 109.9 square miles.
Temporal Representation:
Twenty samples where taken during the wet and dry season from 10/28/00 to 4/30/03 at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions:
QAPP Information:
Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314979
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Los Angeles County Flood Control District_2010 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 20 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
315093
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
7
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Los Angeles County Flood Control District_2010 data for Malibu Creek to determine beneficial use support and results are as follows: 7 of 20 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314949
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314841
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 2 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
315092
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314959
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
315017
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
315097
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314922
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314963
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314709
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314854
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314962
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314976
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Los Angeles County Flood Control District_2010 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 20 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314758
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
315065
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314978
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314977
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
315002
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Sources:
A Source Unknown
TMDL Priority:
Low
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 2 of 2 and 2 of 2 samples exceeded the criteria and this exceeds the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137519, Cyanide
Region 4
Malibu Creek
LOE ID:
86413
Pollutant:
Cyanide
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
27
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical (conventional plus toxic pollutants)
California Toxics Rule (NTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The CTR for cyanide is 5.2 ug/L.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137519, Cyanide
Region 4
Malibu Creek
LOE ID:
252373
Pollutant:
Cyanide
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
2
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 2 of 2 samples exceeded the water quality threshold for Cyanide.
The cyanide criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5.2 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137519, Cyanide
Region 4
Malibu Creek
LOE ID:
252328
Pollutant:
Cyanide
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
2
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 2 of 2 samples exceeded the water quality threshold for Cyanide.
The cyanide criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5.2 ug/L (California Toxics Rule, 2000).
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 7 of 28, 7 of 28, 0 of 3, 0 of 3, 0 of 9 and 0 of 9 samples exceed the objective and this exceeds the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302382
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
14
Number of Exceedances:
6
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 6 of 14 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302332
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
14
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 14 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302188
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302383
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302193
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302267
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302323
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
14
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 14 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302392
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302494
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
9
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 9 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302266
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
14
Number of Exceedances:
6
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 6 of 14 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302488
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
9
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 9 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302182
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nitrate as N.
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Sources:
A Source Unknown
TMDL Priority:
Low
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence are necessary to assess listing status.
28 lines of evidence are available in the administrative record to assess this pollutant. 14 of 40 samples exceeded the objective for cold freshwater habitat. 50 of 1194 samples exceeded the objective for warm freshwater habitat. 21 of 40 samples exceeded the OBJECTIVE.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 14 of 40 samples exceed the objective for cold freshwater habitat and this exceeds the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308236
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Fish Spawning
Number of Samples:
16
Number of Exceedances:
10
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 10 of 16 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as both COLD and SPWN shall not be depressed below 7 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308395
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
307797
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308469
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308430
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
5
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 5 of 16 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308343
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as WARM shall not be depressed below 5 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308372
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Fish Spawning
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as both COLD and SPWN shall not be depressed below 7 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
86292
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-11) states that: "The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges."
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
86291
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Fish Spawning
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-11) states that: "The dissolved oxygen content of all surface waters designated as both COLD and SPWN shall not be depressed below 7 mg/L as a result of waste discharges."
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
86290
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-11) states that: "The dissolved oxygen content of all surface waters designated as WARM shall not be depressed below 5 mg/L as a result of waste discharges."
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Samples were collected from the J_MALICRKL, J_MALICRKU, Malibu Creek R1 (g), Malibu Creek R1 Chronic Bioassay (g), Malibu Creek R1 CTR (g), Malibu Creek R1 Filtered Res. (g), Malibu Creek R13 (g), Malibu Creek R2 (g), Malibu Creek R3, Malibu Creek R3 (g), Malibu Creek R4 (g), Malibu Creek R9 (g), R-1, and S02 stations.
Temporal Representation:
Samples were collected approximately once a week from August 2000 to March 2010.
Environmental Conditions:
QAPP Information:
NPDES quality assurance.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308237
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Fish Spawning
Number of Samples:
16
Number of Exceedances:
9
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 9 of 16 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as both COLD and SPWN shall not be depressed below 7 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308371
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Fish Spawning
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as both COLD and SPWN shall not be depressed below 7 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308376
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Fish Spawning
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as both COLD and SPWN shall not be depressed below 7 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308260
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Fish Spawning
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as both COLD and SPWN shall not be depressed below 7 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
307810
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
5
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 5 of 16 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as WARM shall not be depressed below 5 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308134
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
8
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 8 of 16 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as WARM shall not be depressed below 5 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308454
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308059
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as WARM shall not be depressed below 5 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
307815
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308157
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as WARM shall not be depressed below 5 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308166
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as WARM shall not be depressed below 5 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308482
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
9
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 9 of 16 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308238
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Fish Spawning
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as both COLD and SPWN shall not be depressed below 7 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
307798
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
307872
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as WARM shall not be depressed below 5 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
307999
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as WARM shall not be depressed below 5 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308218
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Fish Spawning
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as both COLD and SPWN shall not be depressed below 7 mg/L as a result of waste discharges.
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Sources:
A Source Unknown
TMDL Priority:
Low
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
During the 2024 cycle, the 1988 National Recommended Water Quality Criteria used to assess aluminum data was replaced with U.S. EPA’s 2018 Final Recommended Aquatic Life Criteria for Aluminum in Freshwater.
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence are necessary to assess listing status.
Thirty-three lines of evidence are available in the administrative record to assess this pollutant. LOEs 86324, 86325 and 86326 were replaced due to reassessment using the 2018 USEPA aluminum criteria.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Eight of 28 and 8 of 28 samples exceeded the criteria and this exceeds the allowable frequency stated by Table 3.1 of the Listing Policy. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314868
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314958
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314836
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314839
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314965
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314680
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
315063
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
315000
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314686
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 2 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314960
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
7
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Los Angeles County Flood Control District_2010 data for Malibu Creek to determine beneficial use support and results are as follows: 7 of 20 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314964
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314818
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314901
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
The Malibu Creek monitoring station is located at the existing stream gauge station (Stream Gauge No. F130-9-R) near Malibu Canyon Road, south of Piuma Road. At this location, the tributary watershed to Malibu Creek is 104.9 square miles. The entire Malibu Creek Watershed is 109.9 square miles.
Temporal Representation:
Twenty samples where taken during the wet and dry season from 10/28/00 to 4/30/03 at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions:
QAPP Information:
Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314979
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Los Angeles County Flood Control District_2010 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 20 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
315093
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
7
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Los Angeles County Flood Control District_2010 data for Malibu Creek to determine beneficial use support and results are as follows: 7 of 20 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314949
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314841
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 2 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
315092
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314959
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
315017
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
315097
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314922
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314963
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314709
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314854
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314962
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314976
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Los Angeles County Flood Control District_2010 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 20 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314758
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
315065
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314978
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
314977
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4_SMC_2008 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Line of Evidence (LOE) for Decision ID 153887, Aluminum
Region 4
Malibu Creek
LOE ID:
315002
Pollutant:
Aluminum
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Aluminum.
The Water Quality Control Plan for the Los Angeles Region states that: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
The aluminum criterion for the protection of aquatic life, is pH, total hardness, and dissolved organic carbon (DOC) dependent. When total hardness or DOC data were not available, default values based on the level III ecoregions developed by U.S EPA were substituted (EPA, 2018). When pH data were not available, the median pH value for the ecoregion, a pH value from a comparable waterbody, or a pH value from a local study in the same waterbody was used as a comparable surrogate.
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Sources:
A Source Unknown
TMDL Priority:
Low
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 2 of 2 and 2 of 2 samples exceeded the criteria and this exceeds the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 137519, Cyanide
Region 4
Malibu Creek
LOE ID:
86413
Pollutant:
Cyanide
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
27
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical (conventional plus toxic pollutants)
California Toxics Rule (NTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The CTR for cyanide is 5.2 ug/L.
Samples were collected from Malibu Creek @ Piume Rd. (sample station S02).
Temporal Representation:
Samples were collected in 2009-2010 from dry weather events No. 12 and 28 and from wet weather events No. 13 and 19. Samples were collected in 2008-2009 from dry weather events No. 15 and 30 and from wet weather events No. 3 and 21. Samples were collected in 2007 - 2008 from dry weather events No. 27 and 47 and from wet weather events No. 21 and 30. Samples were collected in 2006 - 2007 from dry weather events on 11/1/2006 and 4/2/2007 and from wet weather events 12/9/2006 and 2/10/2007.
Environmental Conditions:
QAPP Information:
Data were collected in accordance with NPDES permit No. CAS004001, Order No. 01-182.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 137519, Cyanide
Region 4
Malibu Creek
LOE ID:
252373
Pollutant:
Cyanide
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
2
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 2 of 2 samples exceeded the water quality threshold for Cyanide.
The cyanide criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5.2 ug/L (California Toxics Rule, 2000).
Line of Evidence (LOE) for Decision ID 137519, Cyanide
Region 4
Malibu Creek
LOE ID:
252328
Pollutant:
Cyanide
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
2
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 2 of 2 samples exceeded the water quality threshold for Cyanide.
The cyanide criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5.2 ug/L (California Toxics Rule, 2000).
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 7 of 28, 7 of 28, 0 of 3, 0 of 3, 0 of 9 and 0 of 9 samples exceed the objective and this exceeds the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302382
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
14
Number of Exceedances:
6
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 6 of 14 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302332
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
14
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 14 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302188
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302383
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302193
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302267
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302323
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
14
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 14 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302392
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302494
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
9
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 9 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302266
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
14
Number of Exceedances:
6
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 6 of 14 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302488
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
9
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed LA County MS4 data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 9 samples exceeded the water quality threshold for Nitrate as N.
Line of Evidence (LOE) for Decision ID 149709, Nitrogen, Nitrate
Region 4
Malibu Creek
LOE ID:
302182
Pollutant:
Nitrogen, Nitrate
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nitrate as N.
Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status
Revised
Sources:
A Source Unknown
TMDL Priority:
Low
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence are necessary to assess listing status.
28 lines of evidence are available in the administrative record to assess this pollutant. 14 of 40 samples exceeded the objective for cold freshwater habitat. 50 of 1194 samples exceeded the objective for warm freshwater habitat. 21 of 40 samples exceeded the OBJECTIVE.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List.
This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 14 of 40 samples exceed the objective for cold freshwater habitat and this exceeds the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308236
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Fish Spawning
Number of Samples:
16
Number of Exceedances:
10
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 10 of 16 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as both COLD and SPWN shall not be depressed below 7 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308395
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
307797
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308469
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308430
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
5
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 5 of 16 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308343
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as WARM shall not be depressed below 5 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308372
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Fish Spawning
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as both COLD and SPWN shall not be depressed below 7 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
86292
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-11) states that: "The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges."
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
86291
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Fish Spawning
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-11) states that: "The dissolved oxygen content of all surface waters designated as both COLD and SPWN shall not be depressed below 7 mg/L as a result of waste discharges."
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
86290
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Dissolved
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-11) states that: "The dissolved oxygen content of all surface waters designated as WARM shall not be depressed below 5 mg/L as a result of waste discharges."
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Samples were collected from the J_MALICRKL, J_MALICRKU, Malibu Creek R1 (g), Malibu Creek R1 Chronic Bioassay (g), Malibu Creek R1 CTR (g), Malibu Creek R1 Filtered Res. (g), Malibu Creek R13 (g), Malibu Creek R2 (g), Malibu Creek R3, Malibu Creek R3 (g), Malibu Creek R4 (g), Malibu Creek R9 (g), R-1, and S02 stations.
Temporal Representation:
Samples were collected approximately once a week from August 2000 to March 2010.
Environmental Conditions:
QAPP Information:
NPDES quality assurance.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308237
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Fish Spawning
Number of Samples:
16
Number of Exceedances:
9
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 9 of 16 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as both COLD and SPWN shall not be depressed below 7 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308371
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Fish Spawning
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as both COLD and SPWN shall not be depressed below 7 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308376
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Fish Spawning
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as both COLD and SPWN shall not be depressed below 7 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308260
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Fish Spawning
Number of Samples:
1
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as both COLD and SPWN shall not be depressed below 7 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
307810
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
5
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 5 of 16 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as WARM shall not be depressed below 5 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308134
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
8
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 8 of 16 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as WARM shall not be depressed below 5 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308454
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308059
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as WARM shall not be depressed below 5 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
307815
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308157
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as WARM shall not be depressed below 5 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308166
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as WARM shall not be depressed below 5 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308482
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
16
Number of Exceedances:
9
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed Water Quality Monitoring in the Malibu Creek Water data for Malibu Creek to determine beneficial use support and results are as follows: 9 of 16 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308238
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Fish Spawning
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP RWB4 Monitoring data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as both COLD and SPWN shall not be depressed below 7 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
307798
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed SWAMP Reference Condition Management Plan data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as COLD shall not be depressed below 6 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
307872
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as WARM shall not be depressed below 5 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
307999
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as WARM shall not be depressed below 5 mg/L as a result of waste discharges.
Line of Evidence (LOE) for Decision ID 151901, Oxygen, Dissolved
Region 4
Malibu Creek
LOE ID:
308218
Pollutant:
Oxygen, Dissolved
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Fish Spawning
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Water Board staff assessed RWB4 So. CA Stormwater Monitoring Coalition data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.
The Water Quality Control Plan for the Los Angeles Region (page 3-39) states that: The dissolved oxygen content of all surface waters designated as both COLD and SPWN shall not be depressed below 7 mg/L as a result of waste discharges.
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence are necessary to assess listing status.
1 lines of evidence is available in the administrative record to assess this pollutant.
0 of 1 sample exceeded the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 1 sample exceeded the CRITERIA and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to SECTION 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 94145, Acrolein
Region 4
Malibu Creek
LOE ID:
86310
Pollutant:
Acrolein
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:
One sample was below criteria, but of the others all were less than the reporting limit but greater than criteria.
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
DECISION ID
94952
Region 4
Malibu Creek
Pollutant:
Aldrin
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
1 line of evidence is available in the administrative record to assess this pollutant.
0 of 21 samples exceeded the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 21 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 94952, Aldrin
Region 4
Malibu Creek
LOE ID:
86311
Pollutant:
Aldrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
21
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
DECISION ID
77354
Region 4
Malibu Creek
Pollutant:
Chlordane
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence are necessary to assess listing status.
1 line of evidence is available in the administrative record to assess this pollutant.
0 of 0 sample exceeded the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 0 sample exceeded the CRITERIA and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to SECTION 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 77354, Chlordane
Region 4
Malibu Creek
LOE ID:
86381
Pollutant:
Chlordane
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:
The samples were below the reporting limit which was greater than criteria. The sample was tested for chlordane, not cis-chlordane.
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
DECISION ID
94257
Region 4
Malibu Creek
Pollutant:
DDT (Dichlorodiphenyltrichloroethane)
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence are necessary to assess listing status.
1 line of evidence is available in the administrative record to assess this pollutant.
0 of 0 sample exceeded the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 0 sample exceeded the CRITERIA and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to SECTION 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 94257, DDT (Dichlorodiphenyltrichloroethane)
Region 4
Malibu Creek
LOE ID:
86368
Pollutant:
Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:
All of the samples were less than the reporting limit, which was greater than criteria. The isomer tested for was 4,4-DDT. The 4,4' DDT criterion is applicable to Total DDT. Total DDT is the sum of 4,4- and 2,4-isomers of DDT, DDE, and DDD.
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
DECISION ID
68161
Region 4
Malibu Creek
Pollutant:
Diazinon
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
1 line of evidence is available in the administrative record to assess this pollutant. 1 of the 20 samples exceed the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.
This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 1 of 20 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 68161, Diazinon
Region 4
Malibu Creek
LOE ID:
86422
Pollutant:
Diazinon
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:
The samples were below the reporting limit, which was above criteria.
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 68161, Diazinon
Region 4
Malibu Creek
LOE ID:
2254
Pollutant:
Diazinon
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Numeric data generated from 20 samples taken from 10/28/00 to 4/30/03 at one to two-week sampling interval. One (1) sample exceeded the DFG fresh water assessment criterion for Diazinon. (LACDPW, 2004c).
Numerical Diazinon guideline used to interpret Basin Plan narrative pesticide WQO. The numeric guideline used is 0.10 micro-grams per liter 4-day average generated by DFG as a fresh water assessment criterion for the protection of aquatic life (Siepman & Finlayson, 2000; Finlayson, 2004).
One sample site sampled during the dry and wet season beginning from 10/28/00 through 4/30/03 at approximately one to two week intervals.
Temporal Representation:
Twenty (20) samples where taken during the wet and dry season from 10/12/00 to 4/30/03 at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions:
The Malibu Creek monitoring station is located at the existing stream gage station (Stream Gage No. F130-9-R) near Malibu Canyon Road, south of Piuma Road. At this location, the tributary watershed to Malibu Creek is 104.9 square miles. The entire Malibu Creek Watershed is 109.9 square miles.
QAPP Information:
Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works.
QAPP Information Reference(s):
DECISION ID
94208
Region 4
Malibu Creek
Pollutant:
Dieldrin
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
1 line of evidence is available in the administrative record to assess this pollutant.
0 of 19 samples exceeded the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 19 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 94208, Dieldrin
Region 4
Malibu Creek
LOE ID:
86423
Pollutant:
Dieldrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
19
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:
19 of the samples were below criteria: the other samples were below the reporting limit which was above criteria. (This occurred when the reporting limit changed from 0.05 ug/L to 0.1 ug/L.)
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
DECISION ID
94264
Region 4
Malibu Creek
Pollutant:
Endosulfan
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
1 line of evidence is available in the administrative record to assess this pollutant.
0 of 42 samples exceeded the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 42 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 94264, Endosulfan
Region 4
Malibu Creek
LOE ID:
86424
Pollutant:
Endosulfan
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
21
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:
21 of the samples were below criteria: one other sample was below the reporting limit which was above criteria. (This occurred when the reporting limit changed from 0.05 ug/L to 0.1 ug/L.) (The samples were analyzed for Endosulfan I.)
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 94264, Endosulfan
Region 4
Malibu Creek
LOE ID:
86425
Pollutant:
Endosulfan
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
21
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:
All of the samples were below criteria. (The samples were analyzed for Endosulfan II.)
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
DECISION ID
94265
Region 4
Malibu Creek
Pollutant:
Endrin
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
1 line of evidence is available in the administrative record to assess this pollutant.
0 of 21 samples exceeded the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 21 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 94265, Endrin
Region 4
Malibu Creek
LOE ID:
86427
Pollutant:
Endrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
21
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:
None of the 21 samples exceeded the primary MCL of 0.036 ug/L.
The Region 4 Basin Plan objective is "No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses."
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
DECISION ID
94266
Region 4
Malibu Creek
Pollutant:
Heptachlor
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
1 line of evidence is available in the administrative record to assess this pollutant.
0 of 21 samples exceeded the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 21 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 94266, Heptachlor
Region 4
Malibu Creek
LOE ID:
86433
Pollutant:
Heptachlor
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
21
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
The Region 4 Basin Plan objective is "No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses."
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 94266, Heptachlor
Region 4
Malibu Creek
LOE ID:
86432
Pollutant:
Heptachlor
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:
All of the samples were below the reporting limit, which was greater than criteria.
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
DECISION ID
77355
Region 4
Malibu Creek
Pollutant:
Methoxychlor
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
1 line of evidence is available in the administrative record to assess this pollutant.
0 of 17 samples exceeded the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 17 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 77355, Methoxychlor
Region 4
Malibu Creek
LOE ID:
86282
Pollutant:
Methoxychlor
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
17
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:
17 of the samples were below criteria. The other samples were below the reporting limit, whcih was greater than criteria.
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
DECISION ID
94609
Region 4
Malibu Creek
Pollutant:
Nitrogen, ammonia (Total Ammonia)
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence are necessary to assess listing status.
3 lines of evidence are available in the administrative record to assess this pollutant.
0 of 2 samples exceeded the CRITERIA.
0 of 2 samples exceeded the CRITERIA.
0 of 2 samples exceeded the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 2, 0 of 2 and 0 of 2 samples exceeded the CRITERIA and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to SECTION 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 94609, Nitrogen, ammonia (Total Ammonia)
Region 4
Malibu Creek
LOE ID:
94421
Pollutant:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Ammonia as N, Total.
Aquatic Life Ambient Water Quality Criteria for Ammonia ? Freshwater (USEPA 2013): the 30-day rolling average concentration (criterion continuous concentration or CCC) of total ammonia nitrogen(in mg TAN/L) in freshwater are not to be exceeded more than once every three years on average. The CCC values are based on pH and temperature. The CCC formula is found on page 46 and the table of CCC values is on page 49.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 94609, Nitrogen, ammonia (Total Ammonia)
Region 4
Malibu Creek
LOE ID:
86289
Pollutant:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Fish Spawning
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
0 of 2 samples exceed the water USEPA Temperature and pH-Dependent values of the CCC (Chronic Criterion) for Fish Early Life Stages Present for ammonia. 1 of 2 data is reported as underneath the quantitation limit. This quantitation limit is less than or equal to the water quality standard, the value will be considered as meeting the water quality standard, objective, criterion, or evaluation guideline.
Water Quality Control Plan, Los Angeles Region (Basin Plain): In order to protect aquatic life, ammonia concentrations in inland surface waters characteristic of freshwater shall not exceed the values calculated for the appropriated instream conditions shown in Tables 3-1 to 3-3 (per U.S. EPAs most recent criteria guidance document, 1999 Update of Ambient Water Quality Criteria for Ammonia). The freshwater 30-day average objective is dependent on pH, temperature, and the presence of early life stages of fish.
Line of Evidence (LOE) for Decision ID 94609, Nitrogen, ammonia (Total Ammonia)
Region 4
Malibu Creek
LOE ID:
94420
Pollutant:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Ammonia as N, Total.
Aquatic Life Ambient Water Quality Criteria for Ammonia ? Freshwater (USEPA 2013): the 30-day rolling average concentration (criterion continuous concentration or CCC) of total ammonia nitrogen(in mg TAN/L) in freshwater are not to be exceeded more than once every three years on average. The CCC values are based on pH and temperature. The CCC formula is found on page 46 and the table of CCC values is on page 49.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence are necessary to assess listing status.
1 line of evidence is available in the administrative record to assess this pollutant.
0 of 0 sample exceeded the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 0 sample exceeded the CRITERIA and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to SECTION 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 94326, Toxaphene
Region 4
Malibu Creek
LOE ID:
86384
Pollutant:
Toxaphene
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:
All of the samples were below the reporting limit, which was above criteria.
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
DECISION ID
94145
Region 4
Malibu Creek
Pollutant:
Acrolein
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence are necessary to assess listing status.
1 lines of evidence is available in the administrative record to assess this pollutant.
0 of 1 sample exceeded the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 1 sample exceeded the CRITERIA and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to SECTION 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 94145, Acrolein
Region 4
Malibu Creek
LOE ID:
86310
Pollutant:
Acrolein
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
1
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:
One sample was below criteria, but of the others all were less than the reporting limit but greater than criteria.
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
DECISION ID
94952
Region 4
Malibu Creek
Pollutant:
Aldrin
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
1 line of evidence is available in the administrative record to assess this pollutant.
0 of 21 samples exceeded the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 21 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 94952, Aldrin
Region 4
Malibu Creek
LOE ID:
86311
Pollutant:
Aldrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
21
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
DECISION ID
77354
Region 4
Malibu Creek
Pollutant:
Chlordane
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence are necessary to assess listing status.
1 line of evidence is available in the administrative record to assess this pollutant.
0 of 0 sample exceeded the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 0 sample exceeded the CRITERIA and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to SECTION 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 77354, Chlordane
Region 4
Malibu Creek
LOE ID:
86381
Pollutant:
Chlordane
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:
The samples were below the reporting limit which was greater than criteria. The sample was tested for chlordane, not cis-chlordane.
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
DECISION ID
94257
Region 4
Malibu Creek
Pollutant:
DDT (Dichlorodiphenyltrichloroethane)
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence are necessary to assess listing status.
1 line of evidence is available in the administrative record to assess this pollutant.
0 of 0 sample exceeded the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 0 sample exceeded the CRITERIA and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to SECTION 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 94257, DDT (Dichlorodiphenyltrichloroethane)
Region 4
Malibu Creek
LOE ID:
86368
Pollutant:
Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:
All of the samples were less than the reporting limit, which was greater than criteria. The isomer tested for was 4,4-DDT. The 4,4' DDT criterion is applicable to Total DDT. Total DDT is the sum of 4,4- and 2,4-isomers of DDT, DDE, and DDD.
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
DECISION ID
68161
Region 4
Malibu Creek
Pollutant:
Diazinon
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
1 line of evidence is available in the administrative record to assess this pollutant. 1 of the 20 samples exceed the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.
This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 1 of 20 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 68161, Diazinon
Region 4
Malibu Creek
LOE ID:
86422
Pollutant:
Diazinon
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:
The samples were below the reporting limit, which was above criteria.
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 68161, Diazinon
Region 4
Malibu Creek
LOE ID:
2254
Pollutant:
Diazinon
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
20
Number of Exceedances:
1
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
Numeric data generated from 20 samples taken from 10/28/00 to 4/30/03 at one to two-week sampling interval. One (1) sample exceeded the DFG fresh water assessment criterion for Diazinon. (LACDPW, 2004c).
Numerical Diazinon guideline used to interpret Basin Plan narrative pesticide WQO. The numeric guideline used is 0.10 micro-grams per liter 4-day average generated by DFG as a fresh water assessment criterion for the protection of aquatic life (Siepman & Finlayson, 2000; Finlayson, 2004).
One sample site sampled during the dry and wet season beginning from 10/28/00 through 4/30/03 at approximately one to two week intervals.
Temporal Representation:
Twenty (20) samples where taken during the wet and dry season from 10/12/00 to 4/30/03 at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions:
The Malibu Creek monitoring station is located at the existing stream gage station (Stream Gage No. F130-9-R) near Malibu Canyon Road, south of Piuma Road. At this location, the tributary watershed to Malibu Creek is 104.9 square miles. The entire Malibu Creek Watershed is 109.9 square miles.
QAPP Information:
Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works.
QAPP Information Reference(s):
DECISION ID
94208
Region 4
Malibu Creek
Pollutant:
Dieldrin
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
1 line of evidence is available in the administrative record to assess this pollutant.
0 of 19 samples exceeded the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 19 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 94208, Dieldrin
Region 4
Malibu Creek
LOE ID:
86423
Pollutant:
Dieldrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
19
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:
19 of the samples were below criteria: the other samples were below the reporting limit which was above criteria. (This occurred when the reporting limit changed from 0.05 ug/L to 0.1 ug/L.)
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
DECISION ID
94264
Region 4
Malibu Creek
Pollutant:
Endosulfan
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
1 line of evidence is available in the administrative record to assess this pollutant.
0 of 42 samples exceeded the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 42 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 94264, Endosulfan
Region 4
Malibu Creek
LOE ID:
86424
Pollutant:
Endosulfan
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
21
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:
21 of the samples were below criteria: one other sample was below the reporting limit which was above criteria. (This occurred when the reporting limit changed from 0.05 ug/L to 0.1 ug/L.) (The samples were analyzed for Endosulfan I.)
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 94264, Endosulfan
Region 4
Malibu Creek
LOE ID:
86425
Pollutant:
Endosulfan
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
21
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:
All of the samples were below criteria. (The samples were analyzed for Endosulfan II.)
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
DECISION ID
94265
Region 4
Malibu Creek
Pollutant:
Endrin
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
1 line of evidence is available in the administrative record to assess this pollutant.
0 of 21 samples exceeded the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 21 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 94265, Endrin
Region 4
Malibu Creek
LOE ID:
86427
Pollutant:
Endrin
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
21
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:
None of the 21 samples exceeded the primary MCL of 0.036 ug/L.
The Region 4 Basin Plan objective is "No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses."
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
DECISION ID
94266
Region 4
Malibu Creek
Pollutant:
Heptachlor
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
1 line of evidence is available in the administrative record to assess this pollutant.
0 of 21 samples exceeded the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 21 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 94266, Heptachlor
Region 4
Malibu Creek
LOE ID:
86433
Pollutant:
Heptachlor
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
21
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
The Region 4 Basin Plan objective is "No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses."
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 94266, Heptachlor
Region 4
Malibu Creek
LOE ID:
86432
Pollutant:
Heptachlor
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:
All of the samples were below the reporting limit, which was greater than criteria.
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
DECISION ID
77355
Region 4
Malibu Creek
Pollutant:
Methoxychlor
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
1 line of evidence is available in the administrative record to assess this pollutant.
0 of 17 samples exceeded the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 17 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 77355, Methoxychlor
Region 4
Malibu Creek
LOE ID:
86282
Pollutant:
Methoxychlor
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
17
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:
17 of the samples were below criteria. The other samples were below the reporting limit, whcih was greater than criteria.
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
DECISION ID
94609
Region 4
Malibu Creek
Pollutant:
Nitrogen, ammonia (Total Ammonia)
Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence are necessary to assess listing status.
3 lines of evidence are available in the administrative record to assess this pollutant.
0 of 2 samples exceeded the CRITERIA.
0 of 2 samples exceeded the CRITERIA.
0 of 2 samples exceeded the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 2, 0 of 2 and 0 of 2 samples exceeded the CRITERIA and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to SECTION 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 94609, Nitrogen, ammonia (Total Ammonia)
Region 4
Malibu Creek
LOE ID:
94421
Pollutant:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Cold Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Ammonia as N, Total.
Aquatic Life Ambient Water Quality Criteria for Ammonia ? Freshwater (USEPA 2013): the 30-day rolling average concentration (criterion continuous concentration or CCC) of total ammonia nitrogen(in mg TAN/L) in freshwater are not to be exceeded more than once every three years on average. The CCC values are based on pH and temperature. The CCC formula is found on page 46 and the table of CCC values is on page 49.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Line of Evidence (LOE) for Decision ID 94609, Nitrogen, ammonia (Total Ammonia)
Region 4
Malibu Creek
LOE ID:
86289
Pollutant:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Fish Spawning
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
0 of 2 samples exceed the water USEPA Temperature and pH-Dependent values of the CCC (Chronic Criterion) for Fish Early Life Stages Present for ammonia. 1 of 2 data is reported as underneath the quantitation limit. This quantitation limit is less than or equal to the water quality standard, the value will be considered as meeting the water quality standard, objective, criterion, or evaluation guideline.
Water Quality Control Plan, Los Angeles Region (Basin Plain): In order to protect aquatic life, ammonia concentrations in inland surface waters characteristic of freshwater shall not exceed the values calculated for the appropriated instream conditions shown in Tables 3-1 to 3-3 (per U.S. EPAs most recent criteria guidance document, 1999 Update of Ambient Water Quality Criteria for Ammonia). The freshwater 30-day average objective is dependent on pH, temperature, and the presence of early life stages of fish.
Line of Evidence (LOE) for Decision ID 94609, Nitrogen, ammonia (Total Ammonia)
Region 4
Malibu Creek
LOE ID:
94420
Pollutant:
Nitrogen, ammonia (Total Ammonia)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
2
Number of Exceedances:
0
Data and Information Type:
PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:
State Water Board staff assessed SWAMP data for Malibu Creek to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Ammonia as N, Total.
Aquatic Life Ambient Water Quality Criteria for Ammonia ? Freshwater (USEPA 2013): the 30-day rolling average concentration (criterion continuous concentration or CCC) of total ammonia nitrogen(in mg TAN/L) in freshwater are not to be exceeded more than once every three years on average. The CCC values are based on pH and temperature. The CCC formula is found on page 46 and the table of CCC values is on page 49.
Data for this line of evidence for Malibu Creek was collected at 2 monitoring sites [ Malibu Creek Site 11406 - 404S11406, Malibu Creek Random Site 104 - 404BA0104]
Temporal Representation:
Data was collected over the time period 6/18/2008-5/11/2009.
Environmental Conditions:
Staff is not aware of any special conditions that might affect interpretation of the data.
Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence are necessary to assess listing status.
1 line of evidence is available in the administrative record to assess this pollutant.
0 of 0 sample exceeded the CRITERIA.
Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 0 sample exceeded the CRITERIA and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to SECTION 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 94326, Toxaphene
Region 4
Malibu Creek
LOE ID:
86384
Pollutant:
Toxaphene
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Total
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality:
All of the samples were below the reporting limit, which was above criteria.
Sample site was Malibu Creek, sites R1, R2, and R13 combined.
Temporal Representation:
Samples were collected intermittently from January 2006 through January 2010.
Environmental Conditions:
QAPP Information:
No quality assurance was provided with the data. These samples were presumably collected as part of a permit from the nearby water reclaimation facility.
QAPP Information Reference(s):
DECISION ID
69985
Region 4
Malibu Creek
Pollutant:
Fish Barriers (Fish Passage)
Final Listing Decision:
List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:
List on 303(d) list (TMDL required list)(2016)
Revision Status
Original
Sources:
A Source Unknown
TMDL Priority:
Low
Impairment from Pollutant or Pollution:
Pollution
Regional Board Conclusion:
303(d) listing decisions made prior to 2006 were not held in an assessment database. The original Listing was flawed because fish barriers is not a pollutant but rather could fall under the definition of pollution. Because the original basis for the decision cannot be determined and no new information has become available this is being removed from the CWA section 303(d) List and placed into Category 4c until more data and information can be collected and assessed.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the impairment is due to a non-pollutant or pollution. This impairment therefore falls under Integrated Report Category 4c.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 69985, Fish Barriers (Fish Passage)
Region 4
Malibu Creek
LOE ID:
4324
Pollutant:
Fish Barriers (Fish Passage)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Not Specified
Data Used to Assess Water Quality:
Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
This pollutant is being considered for placement in Category 4c as impaired by pollution under section 3.10 of the Listing Policy. Under section 3.10, waters are listed when a declining trend in water quality is substantiated.
Three lines of evidence are available in the administrative record to assess this pollutant. Five of 7 sites showed an increase in density of mud snails over the three years of sampling (2006, 2007, 2008) and 8 out of 8 sites sampled showed medium or high densities of mud snail in 2008.
At high numbers, mud snails can completely cover a stream bed and damage local stream ecosystems. The colonies outcompete native aquatic invertebrates that the watershed¿s fish and amphibians rely on for food, disrupting the entire food web.
Benthic macroinvertebrates as measured by Southern California IBI (index of biological integrity) in Malibu Creek were poor or fair in 2005 indicating impairment of benthic community structure.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination in Category 4c as impaired by pollution.
This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. Data was collected over a three years time frame and a baseline condition of zero abundance of the invasive species was used.
3. Five of seven sites showed an increase in density of mud snails over a three years of sampling and eight of eight sites sampled showed medium or high densities of mud snail in 2008.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
Regional Board Decision Recommendation:
This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 76592, Invasive Species
Region 4
Malibu Creek
LOE ID:
30179
Pollutant:
Benthic-Macroinvertebrate Bioassessments
LOE Subgroup:
Population/Community Degradation
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Aquatic Life Use:
Fish Spawning | Preservation of Rare & Endangered Species | Wetland Habitat | Wildlife Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Benthic macroinvertebrate surveys
Data Used to Assess Water Quality:
The IBI scores at this site ranked in the ¿fair¿ range (33) in the spring and ¿poor¿ (17) in the fall.
The Basin Plan states that: "All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant or animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analysis of species diversity, population density, growth anomalies, bioassays of appropriate duration or other appropriate methods as specified by the State or Regional Board.¿
The IBI is a multi-metric assessment that employs biological metrics that respond to a habitat or water quality impairment. Each of the biological metrics measured at a site are converted to an IBI score then summed. These cumulative scores are then ranked as very good (80-100), good (60-79), fair (40-49), poor (20-39) and very poor (0-19) habitat conditions. Sites with scores below 39 are considered to have impaired conditions.
The Basin Plan states that: "All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant or animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analysis of species diversity, population density, growth anomalies, bioassays of appropriate duration or other appropriate methods as specified by the State or Regional Board.¿
The IBI is a multi-metric assessment that employs biological metrics that respond to a habitat or water quality impairment. Each of the biological metrics measured at a site are converted to an IBI score then summed. These cumulative scores are then ranked as very good (80-100), good (60-79), fair (40-49), poor (20-39) and very poor (0-19) habitat conditions. Sites with scores below 39 are considered to have impaired conditions.
Two sites in Malibu Creek were sampled, MC1 and MC12
Temporal Representation:
Sites were sampled in winter of 2005.
Environmental Conditions:
Benthic macroinvertebrate populations and IBI scores may also be affected by a wide range of anthropogenic stressors.
QAPP Information:
Data was collected in compliance with California Stream Bioassessment Procedure. Collection procedures were audited by California Department of Fish and Game in 2006.
Line of Evidence (LOE) for Decision ID 76592, Invasive Species
Region 4
Malibu Creek
LOE ID:
28702
Pollutant:
Invasive Species
LOE Subgroup:
Population/Community Degradation
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Aquatic Life Use:
Fish Spawning | Preservation of Rare & Endangered Species | Wetland Habitat | Wildlife Habitat
Number of Samples:
7
Number of Exceedances:
5
Data and Information Type:
Benthic macroinvertebrate surveys
Data Used to Assess Water Quality:
A total of five of seven sites showed an increase in density of mud snails over the three years of sampling (2006, 2007, 2008) and eight of eight sites sampled showed medium or high densities of mud snail in 2008
The Basin Plan states that: "All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant or animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analysis of species diversity, population density, growth anomalies, bioassays of appropriate duration or other appropriate methods as specified by the State or Regional Board.¿
Presence of high densities and increasing densities. While quantitative and predictive research continues, due to its ability to attain extremely high densities, the impacts of the mudsnails on aquatic ecosystems where it occurs in the western U.S. are large and include: decreased densities of native macroinvertebrates and reduced food resources; decreased whole-stream algal production; poor food source in that mudsnails are much more difficult to digest, with their hard shells and operculum than are the thin-shelled, native pulmonate snails that do not have opercula or than soft-bodied, aquatic insect larvae.
Eight sites were sampled in the following locations in Malibu Creek: Lookout Trail, Logan¿s Run culvert U.S. Century Lake; MCSP D.S. of Rock Pool; Texas Crossing MCSP; Salvation Army Camp Bridge; the grated drain of Tapia Park U.S.; Malibu Canyon Rd. U.S. LA County Stream Gauge; the trail at end of Palm Cyn Rd in Serra Retreat; and Cross Creek Rd. U.S. in the middle of Arizona Crossing.
Temporal Representation:
Salvation Army Camp Bridge was sampled in July of 2007 and October of 2008. The other seven sites were sampled in July of 2006, July of 2007, and October of 2008.
Environmental Conditions:
QAPP Information:
Data was collected as detailed in the Santa Monica Bay Restoration Commission and Santa Monica Baykeeper New Zealand Mudsnail Surveys.
303(d) listing decisions made prior to 2006 were not held in an assessment database. The original Listing was flawed because fish barriers is not a pollutant but rather could fall under the definition of pollution. Because the original basis for the decision cannot be determined and no new information has become available this is being removed from the CWA section 303(d) List and placed into Category 4c until more data and information can be collected and assessed.
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the impairment is due to a non-pollutant or pollution. This impairment therefore falls under Integrated Report Category 4c.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 69985, Fish Barriers (Fish Passage)
Region 4
Malibu Creek
LOE ID:
4324
Pollutant:
Fish Barriers (Fish Passage)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Not Specified
Data Used to Assess Water Quality:
Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
This pollutant is being considered for placement in Category 4c as impaired by pollution under section 3.10 of the Listing Policy. Under section 3.10, waters are listed when a declining trend in water quality is substantiated.
Three lines of evidence are available in the administrative record to assess this pollutant. Five of 7 sites showed an increase in density of mud snails over the three years of sampling (2006, 2007, 2008) and 8 out of 8 sites sampled showed medium or high densities of mud snail in 2008.
At high numbers, mud snails can completely cover a stream bed and damage local stream ecosystems. The colonies outcompete native aquatic invertebrates that the watershed¿s fish and amphibians rely on for food, disrupting the entire food web.
Benthic macroinvertebrates as measured by Southern California IBI (index of biological integrity) in Malibu Creek were poor or fair in 2005 indicating impairment of benthic community structure.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination in Category 4c as impaired by pollution.
This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. Data was collected over a three years time frame and a baseline condition of zero abundance of the invasive species was used.
3. Five of seven sites showed an increase in density of mud snails over a three years of sampling and eight of eight sites sampled showed medium or high densities of mud snail in 2008.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
Regional Board Decision Recommendation:
This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 76592, Invasive Species
Region 4
Malibu Creek
LOE ID:
30179
Pollutant:
Benthic-Macroinvertebrate Bioassessments
LOE Subgroup:
Population/Community Degradation
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Aquatic Life Use:
Fish Spawning | Preservation of Rare & Endangered Species | Wetland Habitat | Wildlife Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Benthic macroinvertebrate surveys
Data Used to Assess Water Quality:
The IBI scores at this site ranked in the ¿fair¿ range (33) in the spring and ¿poor¿ (17) in the fall.
The Basin Plan states that: "All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant or animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analysis of species diversity, population density, growth anomalies, bioassays of appropriate duration or other appropriate methods as specified by the State or Regional Board.¿
The IBI is a multi-metric assessment that employs biological metrics that respond to a habitat or water quality impairment. Each of the biological metrics measured at a site are converted to an IBI score then summed. These cumulative scores are then ranked as very good (80-100), good (60-79), fair (40-49), poor (20-39) and very poor (0-19) habitat conditions. Sites with scores below 39 are considered to have impaired conditions.
The Basin Plan states that: "All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant or animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analysis of species diversity, population density, growth anomalies, bioassays of appropriate duration or other appropriate methods as specified by the State or Regional Board.¿
The IBI is a multi-metric assessment that employs biological metrics that respond to a habitat or water quality impairment. Each of the biological metrics measured at a site are converted to an IBI score then summed. These cumulative scores are then ranked as very good (80-100), good (60-79), fair (40-49), poor (20-39) and very poor (0-19) habitat conditions. Sites with scores below 39 are considered to have impaired conditions.
Two sites in Malibu Creek were sampled, MC1 and MC12
Temporal Representation:
Sites were sampled in winter of 2005.
Environmental Conditions:
Benthic macroinvertebrate populations and IBI scores may also be affected by a wide range of anthropogenic stressors.
QAPP Information:
Data was collected in compliance with California Stream Bioassessment Procedure. Collection procedures were audited by California Department of Fish and Game in 2006.
Line of Evidence (LOE) for Decision ID 76592, Invasive Species
Region 4
Malibu Creek
LOE ID:
28702
Pollutant:
Invasive Species
LOE Subgroup:
Population/Community Degradation
Matrix:
Water
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Aquatic Life Use:
Fish Spawning | Preservation of Rare & Endangered Species | Wetland Habitat | Wildlife Habitat
Number of Samples:
7
Number of Exceedances:
5
Data and Information Type:
Benthic macroinvertebrate surveys
Data Used to Assess Water Quality:
A total of five of seven sites showed an increase in density of mud snails over the three years of sampling (2006, 2007, 2008) and eight of eight sites sampled showed medium or high densities of mud snail in 2008
The Basin Plan states that: "All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant or animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analysis of species diversity, population density, growth anomalies, bioassays of appropriate duration or other appropriate methods as specified by the State or Regional Board.¿
Presence of high densities and increasing densities. While quantitative and predictive research continues, due to its ability to attain extremely high densities, the impacts of the mudsnails on aquatic ecosystems where it occurs in the western U.S. are large and include: decreased densities of native macroinvertebrates and reduced food resources; decreased whole-stream algal production; poor food source in that mudsnails are much more difficult to digest, with their hard shells and operculum than are the thin-shelled, native pulmonate snails that do not have opercula or than soft-bodied, aquatic insect larvae.
Eight sites were sampled in the following locations in Malibu Creek: Lookout Trail, Logan¿s Run culvert U.S. Century Lake; MCSP D.S. of Rock Pool; Texas Crossing MCSP; Salvation Army Camp Bridge; the grated drain of Tapia Park U.S.; Malibu Canyon Rd. U.S. LA County Stream Gauge; the trail at end of Palm Cyn Rd in Serra Retreat; and Cross Creek Rd. U.S. in the middle of Arizona Crossing.
Temporal Representation:
Salvation Army Camp Bridge was sampled in July of 2007 and October of 2008. The other seven sites were sampled in July of 2006, July of 2007, and October of 2008.
Environmental Conditions:
QAPP Information:
Data was collected as detailed in the Santa Monica Bay Restoration Commission and Santa Monica Baykeeper New Zealand Mudsnail Surveys.
List on 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:
List on 303(d) list (being addressed by USEPA approved TMDL)(2016)
Revision Status
Original
Sources:
Agriculture-animal | Atmospheric Deposition | Golf course activities | Groundwater Loadings | Irrigated Crop Production | Major Municipal Point Source-dry and/or wet weather discharge | Nonpoint Source | Onsite Wastewater Systems (Septic Tanks) | Urban Runoff/Storm Sewers
TMDL Name:
Malibu Creek Nutrients (50)
TMDL Project Code:
239
Date TMDL Approved by USEPA:
03/21/2003
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for removal on the section 303(d) list under sections 2.2 of the Listing Policy. Under 2.2 of the Policy, a minimum of one line of evidence is needed to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the section 303(d) list. There is sufficient justification to place it in the Being Addressed portion of the 303(d) list because a TMDL has been established by USEPA, and is expected to result in attainment of the standard.
Regional Board Decision Recommendation:
This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 76173, Nutrients (Algae)
Region 4
Malibu Creek
LOE ID:
4325
Pollutant:
Nutrients (Algae)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Not Specified
Data Used to Assess Water Quality:
Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Line of Evidence (LOE) for Decision ID 76173, Nutrients (Algae)
Region 4
Malibu Creek
LOE ID:
28617
Pollutant:
Nutrients (Algae)
LOE Subgroup:
Narrative Description Data
Matrix:
Not Specified
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Not Specified
Data Used to Assess Water Quality:
A TMDL has been established for this water segment-pollutant combination. The Malibu Creek Watershed Nutrient TMDL was established by USEPA on March 21, 2003.
List on 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:
List on 303(d) list (being addressed by USEPA approved TMDL)(2016)
Revision Status
Original
Sources:
Agriculture-animal | Atmospheric Deposition | Golf course activities | Groundwater Loadings | Irrigated Crop Production | Major Municipal Point Source-dry and/or wet weather discharge | Onsite Wastewater Systems (Septic Tanks) | Urban Runoff/Storm Sewers
TMDL Name:
Malibu Creek Nutrients (50)
TMDL Project Code:
239
Date TMDL Approved by USEPA:
03/21/2003
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for removal on the section 303(d) list under sections 2.2 of the Listing Policy. Under 2.2 of the Policy, a minimum of one line of evidence is needed to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the section 303(d) list. There is sufficient justification to place it in the Being Addressed portion of the 303(d) list because a TMDL has been established by USEPA, and is expected to result in attainment of the standard.
Regional Board Decision Recommendation:
This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 72507, Scum/Foam-unnatural
Region 4
Malibu Creek
LOE ID:
28618
Pollutant:
Scum/Foam-unnatural
LOE Subgroup:
Narrative Description Data
Matrix:
Not Specified
Fraction:
None
Beneficial Use:
Non-Contact Recreation
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Not Specified
Data Used to Assess Water Quality:
A TMDL has been established for this water segment-pollutant combination. The Malibu Creek Watershed Nutrient TMDL was established by USEPA on March 21, 2003.
List on 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:
List on 303(d) list (being addressed by USEPA approved TMDL)(2016)
Revision Status
Original
Sources:
A Source Unknown
TMDL Name:
Malibu Lagoon Benthic Comm. Effects (71)
TMDL Project Code:
409
Date TMDL Approved by USEPA:
07/02/2013
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
303(d) listing decisions made prior to 2006 were not held in an assessment database.
There is sufficient justification to place this waterbody/pollutant in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by USEPA, and is expected to result in attainment of the standard.
This conclusion is based on the staff findings that:
1. The Malibu Creek Nutrients, sedimentation and IBI TMDL was approved by USEPA on 07/02/2013
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 69986, Sedimentation/Siltation
Region 4
Malibu Creek
LOE ID:
4327
Pollutant:
Sedimentation/Siltation
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Not Specified
Data Used to Assess Water Quality:
Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
List on 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:
List on 303(d) list (being addressed by USEPA approved TMDL)(2016)
Revision Status
Original
Sources:
Nonpoint Source
TMDL Name:
Malibu Creek Watershed Trash (63)
TMDL Project Code:
719
Date TMDL Approved by USEPA:
07/07/2009
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
303(d) listing decisions made prior to 2006 were not held in an assessment database. The Regional Boards will update this decision when new data and information become available and are assessed.
Regional Board Decision Recommendation:
This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 78692, Trash
Region 4
Malibu Creek
LOE ID:
4328
Pollutant:
Trash
LOE Subgroup:
Visual
Matrix:
Not Specified
Fraction:
Not Recorded
Beneficial Use:
Non-Contact Recreation
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Not Specified
Data Used to Assess Water Quality:
Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
List on 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:
List on 303(d) list (being addressed by USEPA approved TMDL)(2016)
Revision Status
Original
Sources:
Agriculture-animal | Atmospheric Deposition | Golf course activities | Groundwater Loadings | Irrigated Crop Production | Major Municipal Point Source-dry and/or wet weather discharge | Nonpoint Source | Onsite Wastewater Systems (Septic Tanks) | Urban Runoff/Storm Sewers
TMDL Name:
Malibu Creek Nutrients (50)
TMDL Project Code:
239
Date TMDL Approved by USEPA:
03/21/2003
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for removal on the section 303(d) list under sections 2.2 of the Listing Policy. Under 2.2 of the Policy, a minimum of one line of evidence is needed to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the section 303(d) list. There is sufficient justification to place it in the Being Addressed portion of the 303(d) list because a TMDL has been established by USEPA, and is expected to result in attainment of the standard.
Regional Board Decision Recommendation:
This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 76173, Nutrients (Algae)
Region 4
Malibu Creek
LOE ID:
4325
Pollutant:
Nutrients (Algae)
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Not Specified
Data Used to Assess Water Quality:
Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Line of Evidence (LOE) for Decision ID 76173, Nutrients (Algae)
Region 4
Malibu Creek
LOE ID:
28617
Pollutant:
Nutrients (Algae)
LOE Subgroup:
Narrative Description Data
Matrix:
Not Specified
Fraction:
None
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Not Specified
Data Used to Assess Water Quality:
A TMDL has been established for this water segment-pollutant combination. The Malibu Creek Watershed Nutrient TMDL was established by USEPA on March 21, 2003.
List on 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:
List on 303(d) list (being addressed by USEPA approved TMDL)(2016)
Revision Status
Original
Sources:
Agriculture-animal | Atmospheric Deposition | Golf course activities | Groundwater Loadings | Irrigated Crop Production | Major Municipal Point Source-dry and/or wet weather discharge | Onsite Wastewater Systems (Septic Tanks) | Urban Runoff/Storm Sewers
TMDL Name:
Malibu Creek Nutrients (50)
TMDL Project Code:
239
Date TMDL Approved by USEPA:
03/21/2003
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
This pollutant is being considered for removal on the section 303(d) list under sections 2.2 of the Listing Policy. Under 2.2 of the Policy, a minimum of one line of evidence is needed to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the section 303(d) list. There is sufficient justification to place it in the Being Addressed portion of the 303(d) list because a TMDL has been established by USEPA, and is expected to result in attainment of the standard.
Regional Board Decision Recommendation:
This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 72507, Scum/Foam-unnatural
Region 4
Malibu Creek
LOE ID:
28618
Pollutant:
Scum/Foam-unnatural
LOE Subgroup:
Narrative Description Data
Matrix:
Not Specified
Fraction:
None
Beneficial Use:
Non-Contact Recreation
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Not Specified
Data Used to Assess Water Quality:
A TMDL has been established for this water segment-pollutant combination. The Malibu Creek Watershed Nutrient TMDL was established by USEPA on March 21, 2003.
List on 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:
List on 303(d) list (being addressed by USEPA approved TMDL)(2016)
Revision Status
Original
Sources:
A Source Unknown
TMDL Name:
Malibu Lagoon Benthic Comm. Effects (71)
TMDL Project Code:
409
Date TMDL Approved by USEPA:
07/02/2013
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
303(d) listing decisions made prior to 2006 were not held in an assessment database.
There is sufficient justification to place this waterbody/pollutant in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by USEPA, and is expected to result in attainment of the standard.
This conclusion is based on the staff findings that:
1. The Malibu Creek Nutrients, sedimentation and IBI TMDL was approved by USEPA on 07/02/2013
Regional Board Decision Recommendation:
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 69986, Sedimentation/Siltation
Region 4
Malibu Creek
LOE ID:
4327
Pollutant:
Sedimentation/Siltation
LOE Subgroup:
Pollutant-Water
Matrix:
Water
Fraction:
Not Recorded
Beneficial Use:
Warm Freshwater Habitat
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Not Specified
Data Used to Assess Water Quality:
Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
List on 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:
List on 303(d) list (being addressed by USEPA approved TMDL)(2016)
Revision Status
Original
Sources:
Nonpoint Source
TMDL Name:
Malibu Creek Watershed Trash (63)
TMDL Project Code:
719
Date TMDL Approved by USEPA:
07/07/2009
Impairment from Pollutant or Pollution:
Pollutant
Regional Board Conclusion:
303(d) listing decisions made prior to 2006 were not held in an assessment database. The Regional Boards will update this decision when new data and information become available and are assessed.
Regional Board Decision Recommendation:
This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:
Line of Evidence (LOE) for Decision ID 78692, Trash
Region 4
Malibu Creek
LOE ID:
4328
Pollutant:
Trash
LOE Subgroup:
Visual
Matrix:
Not Specified
Fraction:
Not Recorded
Beneficial Use:
Non-Contact Recreation
Number of Samples:
0
Number of Exceedances:
0
Data and Information Type:
Not Specified
Data Used to Assess Water Quality:
Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.