Final California 2026 Integrated Report (303(d) List/305(b) Report)

Supporting Information

Regional Board 4 - Los Angeles Region

Water Body Name:	Edison Canal
Water Body ID:	CAR4100000020210319053913
Water Body Type:	River & Stream


DECISION ID	140642	Region 4
Edison Canal

Pollutant:	Aldrin
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:	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 lines of evidence are available in the administrative record to assess this pollutant. 0 of the 17 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. 0 of the 17 samples exceed 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 140642, Aldrin	Region 4
Edison Canal

LOE ID:

256439

Pollutant:

Aldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Aldrin.

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The aldrin criterion maximum concentration (expressed as a 1-day average) to protect aquatic life in saltwater is 0.65 ug/L. The criterion of 1.3 ug/L provided in the California Toxics Rule is an instantaneous maximum concentration and was divided by 2 in order to better represent a criterion maximum concentration (CMC) value as specified in footnote (g) of Table (b)(1) of the California Toxics Rule (2000).

Objective/Criterion Reference:

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: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-02 and 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140642, Aldrin	Region 4
Edison Canal

LOE ID:

256443

Pollutant:

Aldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for Aldrin.

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140642, Aldrin	Region 4
Edison Canal

LOE ID:

256402

Pollutant:

Aldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-08 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140642, Aldrin	Region 4
Edison Canal

LOE ID:

256387

Pollutant:

Aldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140642, Aldrin	Region 4
Edison Canal

LOE ID:

256420

Pollutant:

Aldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140642	Region 4
Edison Canal

Pollutant:	Aldrin
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:	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 lines of evidence are available in the administrative record to assess this pollutant. 0 of the 17 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. 0 of the 17 samples exceed 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 140642, Aldrin	Region 4
Edison Canal

LOE ID:

256439

Pollutant:

Aldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-02 and 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140642, Aldrin	Region 4
Edison Canal

LOE ID:

256443

Pollutant:

Aldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140642, Aldrin	Region 4
Edison Canal

LOE I


DECISION ID	150433	Region 4
Edison Canal

Pollutant:	Ammonia
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 150433, Ammonia	Region 4
Edison Canal

LOE ID:

257050

Pollutant:

Nitrogen, ammonia (Total Ammonia)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Ammonia as N.

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: For inland surface waters not characteristic of freshwater, the four-day average concentration of unionized ammonia shall not exceed 0.035 mg/L and the one-hour average concentration shall not exceed 0.233 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison CD:

256402

Pollutant:

Aldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-08 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140642, Aldrin	Region 4
Edison Canal

LOE ID:

256387

Pollutant:

Aldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140642, Aldrin	Region 4
Edison Canal

LOE ID:

256420

Pollutant:

Aldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

anal).

Temporal Representation:

The samples were collected between the dates of 2018-11-22 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 150433, Ammonia	Region 4
Edison Canal

LOE ID:

257076

Pollutant:

Nitrogen, ammonia (Total Ammonia)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-22 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 150433, Ammonia	Region 4
Edison Canal

LOE ID:

257243

Pollutant:

Nitrogen, ammonia (Total Ammonia)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N.

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-29 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 150433, Ammonia	Region 4
Edison Canal

LOE ID:

257094

Pollutant:

Nitrogen, ammonia (Total Ammonia)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-22 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 150433, Ammonia	Region 4
Edison Canal

LOE ID:

257198

Pollutant:

Nitrogen, ammonia (Total Ammonia)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-22 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	150433	Region 4
Edison Canal

Pollutant:	Ammonia
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 150433, Ammonia	Region 4
Edison Canal

LOE ID:

257050

Pollutant:

Nitrogen, ammonia (Total Ammonia)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-22 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 150433, Ammonia	Region 4
Edison Canal

LOE ID:

257076

Pollutant:

Nitrogen, ammonia (Total Ammonia)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-22 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 150433, Ammonia	Region 4
Edison Canal

LOE ID:

257243

Pollutant:

Nitrogen, ammonia (Total Ammonia)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data an


DECISION ID	140613	Region 4
Edison Canal

Pollutant:	Arsenic
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 140613, Arsenic	Region 4
Edison Canal

LOE ID:

257349

Pollutant:

Arsenic

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 36 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)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Referencd Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-29 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 150433, Ammonia	Region 4
Edison Canal

LOE ID:

257094

Pollutant:

Nitrogen, ammonia (Total Ammonia)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-22 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 150433, Ammonia	Region 4
Edison Canal

LOE ID:

257198

Pollutant:

Nitrogen, ammonia (Total Ammonia)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-22 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140613, Arsenic	Region 4
Edison Canal

LOE ID:

257589

Pollutant:

Arsenic

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140613, Arsenic	Region 4
Edison Canal

LOE ID:

257308

Pollutant:

Arsenic

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140613, Arsenic	Region 4
Edison Canal

LOE ID:

257412

Pollutant:

Arsenic

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140613, Arsenic	Region 4
Edison Canal

LOE ID:

257418

Pollutant:

Arsenic

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-08 and 2018-10-08

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140613	Region 4
Edison Canal

Pollutant:	Arsenic
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 140613, Arsenic	Region 4
Edison Canal

LOE ID:

257349

Pollutant:

Arsenic

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140613, Arsenic	Region 4
Edison Canal

LOE ID:

257589

Pollutant:

Arsenic

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140613, Arsenic	Region 4
Edison Canal

LOE ID:

257308

Pollutant:

Arsenic

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140613, Arsenic	Region 4
Edison Canal

LOE ID:

257412

Pollutant:

Arsenic

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140613, Arsenic	Region 4
Edison Canal

LOE ID:

257418

Pollutant:

Arsenic

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-08 and 2018-10-08

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140622	Region 4
Edison Canal

Pollutant:	Azinphos-methyl (Guthion)
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 140622, Azinphos-methyl (Guthion)	Region 4
Edison Canal

LOE ID:

257843

Pollutant:

Azinphos-methyl (Guthion)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Azinphos Methyl. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The National Recommended Water Quality Criteria for Azinphos Methyl (Guthion) expressed as a 4-day average for the protection of saltwater aquatic life is a maximum of 0.01 ug/l.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140622, Azinphos-methyl (Guthion)	Region 4
Edison Canal

LOE ID:

257812

Pollutant:

Azinphos-methyl (Guthion)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The National Recommended Water Quality Criteria for Azinphos Methyl (Guthion) expressed as a 4-day average for the protection of saltwater aquatic life is a maximum of 0.01 ug/l.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140622, Azinphos-methyl (Guthion)

Region 4


DECISION ID	140622	Region 4
Edison Canal

Pollutant:	Azinphos-methyl (Guthion)
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 140622, Azinphos-methyl (Guthion)	Region 4
Edison Canal

LOE ID:

257843

Pollutant:

Azinphos-methyl (Guthion)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The National Recommended Water Quality Criteri/tr>

Edison Canal

LOE ID:

257844

Pollutant:

Azinphos-methyl (Guthion)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The National Recommended Water Quality Criteria for Azinphos Methyl (Guthion) expressed as a 4-day average for the protection of saltwater aquatic life is a maximum of 0.01 ug/l.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140622, Azinphos-methyl (Guthion)	Region 4
Edison Canal

LOE ID:

257811

Pollutant:

Azinphos-methyl (Guthion)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Azinphos Methyl. Although a total of 4 samples were collected, 4 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The National Recommended Water Quality Criteria for Azinphos Methyl (Guthion) expressed as a 4-day average for the protection of saltwater aquatic life is a maximum of 0.01 ug/l.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-02 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140622, Azinphos-methyl (Guthion)	Region 4
Edison Canal

LOE ID:

257827

Pollutant:

Azinphos-methyl (Guthion)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The National Recommended Water Quality Criteria for Azinphos Methyl (Guthion) expressed as a 4-day average for the protection of saltwater aquatic life is a maximum of 0.01 ug/l.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

a for Azinphos Methyl (Guthion) expressed as a 4-day average for the protection of saltwater aquatic life is a maximum of 0.01 ug/l. Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. Spatial Representation: The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140622, Azinphos-methyl (Guthion)	Region 4
Edison Canal

LOE ID: 257812 Pollutant: Azinphos-methyl (Guthion) LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Azinphos Methyl. Although a total of 3 samples were collected, 3 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: Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan Evaluation Guideline: The National Recommended Water Quality Criteria for Azinphos Methyl (Guthion) expressed as a 4-day average for the protection of saltwater aquatic life is a maximum of 0.01 ug/l. Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. Spatial Representation: The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY <

Line of Evidence (LOE) for Decision ID 140622, Azinphos-methyl (Guthion)

Region 4


DECISION ID	140640	Region 4
Edison Canal

Pollutant:	Bifenthrin
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 this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Listing Extent:

Line of Evidence (LOE) for Decision ID 140640, Bifenthrin	Region 4
Edison Canal

LOE ID:

257704

Pollutant:

Bifenthrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the water quality threshold for Bifenthrin. Although a total of 2 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The genus mean acute value for a mysid (Mysidopsis bahia) is 0.00397 ug/L (DFG 00-6, 2000).

Guideline Reference:

Edison Canal

LOE ID: 257844 Pollutant: Azinphos-methyl (Guthion) LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Azinphos Methyl. Although a total of 3 samples were collected, 3 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: Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan Evaluation Guideline: The National Recommended Water Quality Criteria for Azinphos Methyl (Guthion) expressed as a 4-day average for the protection of saltwater aquatic life is a maximum of 0.01 ug/l. Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. Spatial Representation: The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-08 to 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140622, Azinphos-methyl (Guthion)	Region 4
Edison Canal

LOE ID: 257811 Pollutant: Azinphos-methyl (Guthion) LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Azinphos Methyl. Although a total of 4 samples were collected, 4 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: Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan Evaluation Guideline: The National Recommended Water Quality Criteria for Azinphos Methyl (Guthion) expressed as a 4-day average for the protection of saltwater aquatic life is a maximum of 0.01 ug/l. Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. Spatial Representation: The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-02 to 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140622, Azinphos-methyl (Guthion)	Region 4
Edison Canal

LOE ID: 257827 Pollutant: Azinphos-methyl (Guthion) LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Azinphos Methyl. Although a total of 3 samples were collected, 3 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: Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan Evaluation Guideline: The National Recommended Water Quality Criteria for Azinphos Methyl (Guthion) expressed as a 4-day average for the protection of saltwater aquatic life is a maximum of 0.01 ug/l. Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016. Spatial Representation: The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY waterboards.ca.gov/water_issues/programs/tmdl/records/state_board/2010/ref3734.pdf" >Aquatic Life Criteria for Pyrethroid Insecticides (DFG Administrative Report 00-6, 2000) Spatial Representation: The samples were collected at 1 monitoring site (Oxn_CI-05). Temporal Representation: Data for this waterbody was collected over the date range 2018-10-02 to 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140640	Region 4
Edison Canal

Pollutant:	Bifenthrin
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 this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Listing Extent:

Line of Evidence (LOE) for Decision ID 140640, Bifenthrin	Region 4
Edison Canal

LOE ID:

257704

Pollutant:

Bifenthrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The genus mean acute value for a mysid (Mysidopsis bahia) is 0.00397 ug/L (DFG 00-6, 2000).

Guideline Reference:

Aquatic Life Criteria for Pyrethroid Insecticides (DFG Administrative Report 00-6, 2000)

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-05).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-02 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140614	Region 4
Edison Canal

Pollutant:	Cadmium
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 140614, Cadmium	Region 4
Edison Canal

LOE ID:

258071

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 9.3 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring s


DECISION ID	140614	Region 4
Edison Canal

Pollutant:	Cadmium
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 140614, Cadmium	Region 4
Edison Canal

LOE ID:

258071

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 9.3 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140614, Cadmium	Region 4
Edison Canal

LOE ID:

258188

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 9.3 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140614, Cadmium	Region 4
Edison Canal

LOE ID:

258189

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140614, Cadmium	Region 4
Edison Canal

LOE ID:

258188

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 9.3 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140614, Cadmium	Region 4
Edison Canal

LOE ID:

258189

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 9.3 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140614, Cadmium	Region 4
Edison Canal

LOE ID:

257891

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 9.3 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-08 and 2018-10-08

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140614, Cadmium	Region 4
Edison Canal

LOE ID:

258039

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 9.3 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

align="left" valign="top" width="33%">Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 9.3 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140614, Cadmium	Region 4
Edison Canal

LOE ID:

257891

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 9.3 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-08 and 2018-10-08

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140614, Cadmium	Region 4
Edison Canal

LOE ID:

258039

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved cadmium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 9.3 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140615	Region 4
Edison Canal

Pollutant:	Chlordane
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 140615, Chlordane	Region 4
Edison Canal

LOE ID:

267469

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Total Chlordane. Although a total of 5 samples were collected, 5 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The chlordane criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.004 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

DECISION ID

140615

Region 4

Edison Canal

Pollutant:	Chlordane
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 140615, Chlordane	Region 4
Edison Canal

LOE ID:

267469

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Total Chlordane. Although a total of 5 samples were collected, 5 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The chlordane criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.004 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-02 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140615, Chlordane	Region 4
Edison Canal

LOE ID:

267505

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Total Chlordane. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The chlordane criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.004 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140615, Chlordane	Region 4
Edison Canal

LOE ID:

267609

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Water

Matrtd>

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-02 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140615, Chlordane	Region 4
Edison Canal

LOE ID:

267505

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Total Chlordane. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The chlordane criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.004 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140615, Chlordane	Region 4
Edison Canal

LOE ID:

267609

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Total Chlordane. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The chlordane criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.004 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140615, Chlordane	Region 4
Edison Canal

LOE ID:

267628

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Total Chlordane. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The chlordane criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.004 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140615, Chlordane	Region 4
Edison Canal

LOE ID:

267450

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Total Chlordane. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The chlordane criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.004 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

ix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Total Chlordane. Although a total of 3 samples were collected, 3 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The chlordane criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.004 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-29 (Oxn_CI-29_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140615, Chlordane	Region 4
Edison Canal

LOE ID: 267628 Pollutant: Chlordane LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Total Chlordane. Although a total of 3 samples were collected, 3 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The chlordane criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.004 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-30 (Oxn_CI-30_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140615, Chlordane	Region 4
Edison Canal

LOE ID: 267450 Pollutant: Chlordane LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Total Chlordane. Although a total of 3 samples were collected, 3 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The chlordane criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.004 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-28 (Oxn_CI-28_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140616	Region 4
Edison Canal

Pollutant:	Chlorpyrifos
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 140616, Chlorpyrifos	Region 4
Edison Canal

LOE ID:

258427

Pollutant:

Chlorpyrifos

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Chlorpyrifos. Although a total of 4 samples were collected, 4 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The saltwater criterion continuous concentration to protect aquatic organisms is 0.009 u


DECISION ID	140616	Region 4
Edison Canal

Pollutant:	Chlorpyrifos
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 140616, Chlorpyrifos	Region 4
Edison Canal

LOE ID:

258427

Pollutant:

Chlorpyrifos

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Chlorpyrifos. Although a total of 4 samples were collected, 4 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The saltwater criterion continuous concentration to protect aquatic organisms is 0.009 ug/L (Siepmann and Finlayson 2000).

Guideline Reference:

Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-02 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140616, Chlorpyrifos	Region 4
Edison Canal

LOE ID:

258329

Pollutant:

Chlorpyrifos

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Chlorpyrifos. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The saltwater criterion continuous concentration to protect aquatic organisms is 0.009 ug/L (Siepmann and Finlayson 2000).

Guideline Reference:

Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140616, Chlorpyrifos

Region 4

Guideline Reference:

Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-02 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140616, Chlorpyrifos	Region 4
Edison Canal

LOE ID:

258329

Pollutant:

Chlorpyrifos

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Chlorpyrifos. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The saltwater criterion continuous concentration to protect aquatic organisms is 0.009 ug/L (Siepmann and Finlayson 2000).

Guideline Reference:

Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140616, Chlorpyrifos	Region 4
Edison Canal

LOE ID:

258389

Pollutant:

Chlorpyrifos

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Chlorpyrifos. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The saltwater criterion continuous concentration to protect aquatic organisms is 0.009 ug/L (Siepmann and Finlayson 2000).

Guideline Reference:

Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140616, Chlorpyrifos	Region 4
Edison Canal

LOE ID:

258387

Pollutant:

Chlorpyrifos

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Chlorpyrifos. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The saltwater criterion continuous concentration to protect aquatic organisms is 0.009 ug/L (Siepmann and Finlayson 2000).

Guideline Reference:

Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140616, Chlorpyrifos	Region 4
Edison Canal

LOE ID:

258346

Pollutant:

Chlorpyrifos

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Chlorpyrifos. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The saltwater criterion continuous concentration to protect aquatic organisms is 0.009 ug/L (Siepmann and Finlayson 2000).

Guideline Reference:

Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

%; PADDING-LEFT: 0%; FONT-WEIGHT: bold; PADDING-BOTTOM: 3px; WIDTH: 100%; text-align: left; PADDING-TOP: 3px; font-smooth: always">Edison Canal

LOE ID:

258389

Pollutant:

Chlorpyrifos

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Chlorpyrifos. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The saltwater criterion continuous concentration to protect aquatic organisms is 0.009 ug/L (Siepmann and Finlayson 2000).

Guideline Reference:

Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140616, Chlorpyrifos	Region 4
Edison Canal

LOE ID:

258387

Pollutant:

Chlorpyrifos

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Chlorpyrifos. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The saltwater criterion continuous concentration to protect aquatic organisms is 0.009 ug/L (Siepmann and Finlayson 2000).

Guideline Reference:

Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140616, Chlorpyrifos	Region 4
Edison Canal

LOE ID:

258346

Pollutant:

Chlorpyrifos

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Chlorpyrifos. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The saltwater criterion continuous concentration to protect aquatic organisms is 0.009 ug/L (Siepmann and Finlayson 2000).

Guideline Reference:

Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140617	Region 4
Edison Canal

Pollutant:	Copper
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 140617, Copper	Region 4
Edison Canal

LOE ID:

259324

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 3.1 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

DECISION ID

140617

Region 4

Edison Canal

Pollutant:	Copper
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 140617, Copper	Region 4
Edison Canal

LOE ID:

259324

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 3.1 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-10-08

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140617, Copper	Region 4
Edison Canal

LOE ID:

259192

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 3.1 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140617, Copper	Region 4
Edison Canal

LOE ID:

258870

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-10-08

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140617, Copper	Region 4
Edison Canal

LOE ID:

259192

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 3.1 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140617, Copper	Region 4
Edison Canal

LOE ID:

258870

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 3.1 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140617, Copper	Region 4
Edison Canal

LOE ID:

258914

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 3.1 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140617, Copper	Region 4
Edison Canal

LOE ID:

258916

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 3.1 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

eft" valign="top" width="67%">Water Fraction: Dissolved Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 3.1 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-28 (Oxn_CI-28_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-09 to 2018-10-09 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140617, Copper	Region 4
Edison Canal

LOE ID: 258914 Pollutant: Copper LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Dissolved Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 3.1 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-05 (Oxn_CI-05_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-09 to 2018-10-09 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140617, Copper	Region 4
Edison Canal

LOE ID: 258916 Pollutant: Copper LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Dissolved Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 3.1 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-29 (Oxn_CI-29_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-09 to 2018-10-09 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140641	Region 4
Edison Canal

Pollutant:	Cypermethrin
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 140641, Cypermethrin	Region 4
Edison Canal

LOE ID:

259721

Pollutant:

Cypermethrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal 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.

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The genus mean acute value for a grass shrimp (Palaemonetes pugio) of 0.016 ug/L (DFG 00-6, 2000).

Guideline Reference:

Aquatic Life Criteria for Pyrethroid Insecticides (DFG Administrative Report 00-6, 2000)

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-11-22 to 2018-11-22

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140641	Region 4
Edison Canal

Pollutant:	Cypermethrin
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 140641, Cypermethrin	Region 4
Edison Canal

LOE ID:

259721

Pollutant:

Cypermethrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal 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.

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The genus mean acute value for a grass shrimp (Palaemonetes pugio) of 0.016 ug/L (DFG 00-6, 2000).

Guideline Reference:

Aquatic Life Criteria for Pyrethroid Insecticides (DFG Administrative Report 00-6, 2000)

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-11-22 to 2018-11-22

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	149385	Region 4
Edison Canal

Pollutant:	DDT (Dichlorodiphenyltrichloroethane)
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 149385, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Edison Canal

LOE ID:

259848

Pollutant:

DDT (Dichlorodiphenyltrichloroethane)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDT(p,p'). Although a total of 2 samples were collected, 2 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The DDT(4,4') criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.001 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:


DECISION ID	149385	Region 4
Edison Canal

Pollutant:	DDT (Dichlorodiphenyltrichloroethane)
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 149385, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Edison Canal

LOE ID:

259848

Pollutant:

DDT (Dichlorodiphenyltrichloroethane)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDT(p,p'). Although a total of 2 samples were collected, 2 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The DDT(4,4') criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.001 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-11-22

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149385, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Edison Canal

LOE ID:

259796

Pollutant:

DDT (Dichlorodiphenyltrichloroethane)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDT(p,p'). Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The DDT(4,4') criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.001 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149385, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Edison Canal

LOE ID:

259953

Pollutant:

DDT (Dichlorodiphenyltrichloroethane)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-11-22

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149385, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Edison Canal

LOE ID:

259796

Pollutant:

DDT (Dichlorodiphenyltrichloroethane)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDT(p,p'). Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The DDT(4,4') criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.001 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149385, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Edison Canal

LOE ID:

259953

Pollutant:

DDT (Dichlorodiphenyltrichloroethane)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the water quality threshold for DDT(p,p'). Although a total of 4 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The DDT(4,4') criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.001 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-05).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-02 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149385, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Edison Canal

LOE ID:

260004

Pollutant:

DDT (Dichlorodiphenyltrichloroethane)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDT(p,p'). Although a total of 2 samples were collected, 2 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The DDT(4,4') criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.001 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-22

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149385, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Edison Canal

LOE ID:

259941

Pollutant:

DDT (Dichlorodiphenyltrichloroethane)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDT(p,p'). Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The DDT(4,4') criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.001 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the water quality threshold for DDT(p,p'). Although a total of 4 samples were collected, 3 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The DDT(4,4') criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.001 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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 (Oxn_CI-05). Temporal Representation: Data for this waterbody was collected over the date range 2018-10-02 to 2019-12-04 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149385, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Edison Canal

LOE ID: 260004 Pollutant: DDT (Dichlorodiphenyltrichloroethane) LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDT(p,p'). Although a total of 2 samples were collected, 2 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The DDT(4,4') criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.001 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-29 (Oxn_CI-29_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-22 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149385, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Edison Canal

LOE ID: 259941 Pollutant: DDT (Dichlorodiphenyltrichloroethane) LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDT(p,p'). Although a total of 3 samples were collected, 3 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The DDT(4,4') criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.001 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-30 (Oxn_CI-30_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140643	Region 4
Edison Canal

Pollutant:	Demeton
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 this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Listing Extent:

Line of Evidence (LOE) for Decision ID 140643, Demeton	Region 4
Edison Canal

LOE ID:

260217

Pollutant:

Demeton

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Demeton, Total. Although a total of 5 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

USEPA National Recommended Water Quality Criteria lists criterion continuous concentrations for Demeton to protect aquatic life in freshwater and saltwater is 0.1 ug/L.

Guideline Referen


DECISION ID	140643	Region 4
Edison Canal

Pollutant:	Demeton
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 this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Listing Extent:

Line of Evidence (LOE) for Decision ID 140643, Demeton	Region 4
Edison Canal

LOE ID:

260217

Pollutant:

Demeton

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

USEPA National Recommended Water Quality Criteria lists criterion continuous concentrations for Demeton to protect aquatic life in freshwater and saltwater is 0.1 ug/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-29).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140643, Demeton	Region 4
Edison Canal

LOE ID:

260216

Pollutant:

Demeton

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

USEPA National Recommended Water Quality Criteria lists criterion continuous concentrations for Demeton to protect aquatic life in freshwater and saltwater is 0.1 ug/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-30).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140643, Demeton	Region 4
Edison Canal

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-29).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140643, Demeton	Region 4
Edison Canal

LOE ID:

260216

Pollutant:

Demeton

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

USEPA National Recommended Water Quality Criteria lists criterion continuous concentrations for Demeton to protect aquatic life in freshwater and saltwater is 0.1 ug/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-30).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140643, Demeton	Region 4
Edison Canal

LOE ID:

260141

Pollutant:

Demeton

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Demeton, Total. Although a total of 6 samples were collected, 4 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

USEPA National Recommended Water Quality Criteria lists criterion continuous concentrations for Demeton to protect aquatic life in freshwater and saltwater is 0.1 ug/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-05).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-02 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140643, Demeton	Region 4
Edison Canal

LOE ID:

260123

Pollutant:

Demeton

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

USEPA National Recommended Water Quality Criteria lists criterion continuous concentrations for Demeton to protect aquatic life in freshwater and saltwater is 0.1 ug/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-28).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140643, Demeton	Region 4
Edison Canal

LOE ID:

260218

Pollutant:

Demeton

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

USEPA National Recommended Water Quality Criteria lists criterion continuous concentrations for Demeton to protect aquatic life in freshwater and saltwater is 0.1 ug/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-04).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-08 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

valign="top" width="33%">LOE ID:

260141

Pollutant:

Demeton

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Demeton, Total. Although a total of 6 samples were collected, 4 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

USEPA National Recommended Water Quality Criteria lists criterion continuous concentrations for Demeton to protect aquatic life in freshwater and saltwater is 0.1 ug/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-05).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-02 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140643, Demeton	Region 4
Edison Canal

LOE ID:

260123

Pollutant:

Demeton

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

USEPA National Recommended Water Quality Criteria lists criterion continuous concentrations for Demeton to protect aquatic life in freshwater and saltwater is 0.1 ug/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-28).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140643, Demeton	Region 4
Edison Canal

LOE ID:

260218

Pollutant:

Demeton

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

USEPA National Recommended Water Quality Criteria lists criterion continuous concentrations for Demeton to protect aquatic life in freshwater and saltwater is 0.1 ug/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-04).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-08 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140619	Region 4
Edison Canal

Pollutant:	Diazinon
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:	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 the 16 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. 0 of the 16 samples exceed 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 140619, Diazinon	Region 4
Edison Canal

LOE ID:

260149

Pollutant:

Diazinon

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los


DECISION ID	140619	Region 4
Edison Canal

Pollutant:	Diazinon
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:	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 the 16 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. 0 of the 16 samples exceed 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 140619, Diazinon	Region 4
Edison Canal

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The chronic criterion for diazinon to protect saltwater aquatic organisms is 0.82 ug/L (EPA-822-R-05-006).

Guideline Reference:

Aquatic Life Ambient Water Quality Criteria for Diazinon

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140619, Diazinon	Region 4
Edison Canal

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The chronic criterion for diazinon to protect saltwater aquatic organisms is 0.82 ug/L (EPA-822-R-05-006).

Guideline Reference:

Aquatic Life Ambient Water Quality Criteria for Diazinon

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-08 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140619, Diazinon	Region 4
Edison Canal

LOE ID:

260264

Evaluation Guideline:

The chronic criterion for diazinon to protect saltwater aquatic organisms is 0.82 ug/L (EPA-822-R-05-006).

Guideline Reference:

Aquatic Life Ambient Water Quality Criteria for Diazinon

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140619, Diazinon	Region 4
Edison Canal

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The chronic criterion for diazinon to protect saltwater aquatic organisms is 0.82 ug/L (EPA-822-R-05-006).

Guideline Reference:

Aquatic Life Ambient Water Quality Criteria for Diazinon

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-08 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140619, Diazinon	Region 4
Edison Canal

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Diazinon.

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The chronic criterion for diazinon to protect saltwater aquatic organisms is 0.82 ug/L (EPA-822-R-05-006).

Guideline Reference:

Aquatic Life Ambient Water Quality Criteria for Diazinon

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-02 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140619, Diazinon	Region 4
Edison Canal

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The chronic criterion for diazinon to protect saltwater aquatic organisms is 0.82 ug/L (EPA-822-R-05-006).

Guideline Reference:

Aquatic Life Ambient Water Quality Criteria for Diazinon

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140619, Diazinon	Region 4
Edison Canal

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The chronic criterion for diazinon to protect saltwater aquatic organisms is 0.82 ug/L (EPA-822-R-05-006).

Guideline Reference:

Aquatic Life Ambient Water Quality Criteria for Diazinon

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

" valign="top" width="33%">Pollutant:

Diazinon

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The chronic criterion for diazinon to protect saltwater aquatic organisms is 0.82 ug/L (EPA-822-R-05-006).

Guideline Reference:

Aquatic Life Ambient Water Quality Criteria for Diazinon

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-02 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140619, Diazinon	Region 4
Edison Canal

LOE ID:

260299

Pollutant:

Diazinon

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The chronic criterion for diazinon to protect saltwater aquatic organisms is 0.82 ug/L (EPA-822-R-05-006).

Guideline Reference:

Aquatic Life Ambient Water Quality Criteria for Diazinon

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140619, Diazinon	Region 4
Edison Canal

LOE ID:

260109

Pollutant:

Diazinon

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The chronic criterion for diazinon to protect saltwater aquatic organisms is 0.82 ug/L (EPA-822-R-05-006).

Guideline Reference:

Aquatic Life Ambient Water Quality Criteria for Diazinon

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140620	Region 4
Edison Canal

Pollutant:	Dieldrin
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 140620, Dieldrin	Region 4
Edison Canal

LOE ID:

260367

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Dieldrin. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dieldrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0019 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

DECISION ID

140620

Region 4

Edison Canal

Pollutant:	Dieldrin
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 140620, Dieldrin	Region 4
Edison Canal

LOE ID:

260367

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Dieldrin. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dieldrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0019 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140620, Dieldrin	Region 4
Edison Canal

LOE ID:

260547

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Dieldrin. Although a total of 5 samples were collected, 5 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dieldrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0019 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-02 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140620, Dieldrin	Region 4
Edison Canal

LOE ID:

260629

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140620, Dieldrin	Region 4
Edison Canal

LOE ID:

260547

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Dieldrin. Although a total of 5 samples were collected, 5 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dieldrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0019 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-02 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140620, Dieldrin	Region 4
Edison Canal

LOE ID:

260629

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Dieldrin. Although a total of 2 samples were collected, 2 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dieldrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0019 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-11-22 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140620, Dieldrin	Region 4
Edison Canal

LOE ID:

260626

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Dieldrin. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dieldrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0019 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140620, Dieldrin	Region 4
Edison Canal

LOE ID:

260627

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Dieldrin. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dieldrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0019 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

eft" valign="top" width="67%">Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Dieldrin. Although a total of 2 samples were collected, 2 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The dieldrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0019 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-29 (Oxn_CI-29_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-11-22 to 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140620, Dieldrin	Region 4
Edison Canal

LOE ID: 260626 Pollutant: Dieldrin LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Dieldrin. Although a total of 3 samples were collected, 3 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The dieldrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0019 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-30 (Oxn_CI-30_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140620, Dieldrin	Region 4
Edison Canal

LOE ID: 260627 Pollutant: Dieldrin LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Dieldrin. Although a total of 3 samples were collected, 3 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The dieldrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0019 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-28 (Oxn_CI-28_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140621	Region 4
Edison Canal

Pollutant:	Endrin
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 140621, Endrin	Region 4
Edison Canal

LOE ID:

261323

Pollutant:

Endrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Endrin. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The endrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0023 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

DECISION ID

140621

Region 4

Edison Canal

Pollutant:	Endrin
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 140621, Endrin	Region 4
Edison Canal

LOE ID:

261323

Pollutant:

Endrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Endrin. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The endrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0023 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140621, Endrin	Region 4
Edison Canal

LOE ID:

261300

Pollutant:

Endrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Endrin. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The endrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0023 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140621, Endrin	Region 4
Edison Canal

LOE ID:

261283

Pollutant:

Endrin

LOE Subgroup:

Pollutant-Water

Matrix:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140621, Endrin	Region 4
Edison Canal

LOE ID:

261300

Pollutant:

Endrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Endrin. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The endrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0023 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140621, Endrin	Region 4
Edison Canal

LOE ID:

261283

Pollutant:

Endrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Endrin. Although a total of 5 samples were collected, 5 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The endrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0023 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-02 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140621, Endrin	Region 4
Edison Canal

LOE ID:

261080

Pollutant:

Endrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Endrin. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The endrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0023 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140621, Endrin	Region 4
Edison Canal

LOE ID:

261059

Pollutant:

Endrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Endrin. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The endrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0023 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

h="67%">Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Endrin. Although a total of 5 samples were collected, 5 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The endrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0023 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-05 (Oxn_CI-05_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-02 to 2019-12-04 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140621, Endrin	Region 4
Edison Canal

LOE ID: 261080 Pollutant: Endrin LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Endrin. Although a total of 3 samples were collected, 3 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The endrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0023 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-30 (Oxn_CI-30_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140621, Endrin	Region 4
Edison Canal

LOE ID: 261059 Pollutant: Endrin LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Endrin. Although a total of 3 samples were collected, 3 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The endrin criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0023 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-29 (Oxn_CI-29_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140623	Region 4
Edison Canal

Pollutant:	Heptachlor
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 140623, Heptachlor	Region 4
Edison Canal

LOE ID:

262097

Pollutant:

Heptachlor

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0036 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140623, Heptachlor	Region 4
Edison Canal

LOE ID:

262034

Pollutant:

Heptachlor

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0036 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140623, Heptachlor	Region 4
Edison Canal

LOE ID:

261976

Pollutant:

Heptachlor

LOE Subgroup:

Pollutant-Water

Mat


DECISION ID	140623	Region 4
Edison Canal

Pollutant:	Heptachlor
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 140623, Heptachlor	Region 4
Edison Canal

LOE ID:

262097

Pollutant:

Heptachlor

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0036 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0036 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140623, Heptachlor	Region 4
Edison Canal

LOE ID:

261959

Pollutant:

Heptachlor

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor. Although a total of 5 samples were collected, 5 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0036 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-02 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140623, Heptachlor	Region 4
Edison Canal

LOE ID:

261911

Pollutant:

Heptachlor

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0036 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

td>

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140623, Heptachlor	Region 4
Edison Canal

LOE ID:

262034

Pollutant:

Heptachlor

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0036 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140623, Heptachlor	Region 4
Edison Canal

LOE ID:

261976

Pollutant:

Heptachlor

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0036 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140623, Heptachlor	Region 4
Edison Canal

LOE ID:

261959

Pollutant:

Heptachlor

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor. Although a total of 5 samples were collected, 5 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0036 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-02 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140623, Heptachlor	Region 4
Edison Canal

LOE ID:

261911

Pollutant:

Heptachlor

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0036 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140624	Region 4
Edison Canal

Pollutant:	Heptachlor epoxide
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 140624, Heptachlor epoxide	Region 4
Edison Canal

LOE ID:

262456

Pollutant:

Heptachlor epoxide

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor Epoxide. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor epoxide criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0036 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140624, Heptachlor epoxide	Region 4
Edison Canal

LOE ID:

262455

Pollutant:

Heptachlor epoxide

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor Epoxide. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor epoxide criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0036 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140624, Heptachlor epoxide	Region 4
Edison Canal

LOE ID:

262359

Pollutant:

Heptachlor epoxide

LOE Subgroup:

DECISION ID

140624

Region 4

Edison Canal

Pollutant:	Heptachlor epoxide
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 140624, Heptachlor epoxide	Region 4
Edison Canal

LOE ID:

262456

Pollutant:

Heptachlor epoxide

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor Epoxide. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor epoxide criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0036 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor Epoxide. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor epoxide criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0036 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140624, Heptachlor epoxide	Region 4
Edison Canal

LOE ID:

261923

Pollutant:

Heptachlor epoxide

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor Epoxide. Although a total of 5 samples were collected, 5 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor epoxide criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0036 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-02 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140624, Heptachlor epoxide	Region 4
Edison Canal

LOE ID:

262490

Pollutant:

Heptachlor epoxide

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor Epoxide. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor epoxide criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0036 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

" width="33%">Evaluation Guideline: Guideline Reference: Spatial Representation: The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-08 to 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140624, Heptachlor epoxide	Region 4
Edison Canal

LOE ID: 262455 Pollutant: Heptachlor epoxide LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor Epoxide. Although a total of 3 samples were collected, 3 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The heptachlor epoxide criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0036 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-30 (Oxn_CI-30_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140624, Heptachlor epoxide	Region 4
Edison Canal

LOE ID: 262359 Pollutant: Heptachlor epoxide LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor Epoxide. Although a total of 3 samples were collected, 3 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The heptachlor epoxide criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0036 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-29 (Oxn_CI-29_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140624, Heptachlor epoxide	Region 4
Edison Canal

LOE ID: 261923 Pollutant: Heptachlor epoxide LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor Epoxide. Although a total of 5 samples were collected, 5 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The heptachlor epoxide criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0036 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-05 (Oxn_CI-05_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-02 to 2019-12-04 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140624, Heptachlor epoxide	Region 4
Edison Canal

LOE ID: 262490 Pollutant: Heptachlor epoxide LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor Epoxide. Although a total of 3 samples were collected, 3 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The heptachlor epoxide criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0036 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-28 (Oxn_CI-28_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140625	Region 4
Edison Canal

Pollutant:	Lead
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 140625, Lead	Region 4
Edison Canal

LOE ID:

263139

Pollutant:

Lead

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 8.1 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140625, Lead	Region 4
Edison Canal

LOE ID:

263072

Pollutant:

Lead

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 8.1 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140625, Lead	Region 4
Edison Canal

LOE ID:

262991

Pollutant:

Lead

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

DECISION ID

140625

Region 4

Edison Canal

Pollutant:	Lead
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 140625, Lead	Region 4
Edison Canal

LOE ID:

263139

Pollutant:

Lead

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 8.1 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 "33%">Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 8.1 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-08 and 2018-10-08

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140625, Lead	Region 4
Edison Canal

LOE ID:

263007

Pollutant:

Lead

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 8.1 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140625, Lead	Region 4
Edison Canal

LOE ID:

263033

Pollutant:

Lead

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 8.1 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

(Oxn_CI-28_Edison Canal). Temporal Representation: The samples were collected between the dates of 2018-10-09 and 2018-10-09 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140625, Lead	Region 4
Edison Canal

LOE ID: 263072 Pollutant: Lead LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Dissolved Beneficial Use: Marine Habitat Number of Samples: 1 Number of Exceedances: 0 Data and Information Type: PHYSICAL/CHEMICAL MONITORING Data Used to Assess Water Quality: Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead. Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 8.1 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-05 (Oxn_CI-05_Edison Canal). Temporal Representation: The samples were collected between the dates of 2018-10-09 and 2018-10-09 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140625, Lead	Region 4
Edison Canal

LOE ID: 262991 Pollutant: Lead LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Dissolved Beneficial Use: Marine Habitat Number of Samples: 1 Number of Exceedances: 0

DECISION ID

140626

Region 4

Edison Canal

Pollutant:	Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
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 this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Listing Extent:

Line of Evidence (LOE) for Decision ID 140626, Lindane/gamma Hexachlorocyclohexane (gamma-HCH)	Region 4
Edison Canal

LOE ID:

262029

Pollutant:

Lindane/gamma Hexachlorocyclohexane (gamma-HCH)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 4 samples exceeded the water quality threshold for HCH, gamma-. Although a total of 5 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The gamma-BHC (Lindane) criterion maximum concentration (expressed as a 1-day average) to protect aquatic life in saltwater is 0.08 ug/L. The criterion of 0.16 ug/L provided in the California Toxics Rule is an instantaneous maximum concentration and was divided by 2 in order to better represent a criterion maximum concentration (CMC) value as specified in footnote (g) of Table (b)(1) of the California Toxics Rule (2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-05).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-02 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

"33%">Data and Information Type: PHYSICAL/CHEMICAL MONITORING Data Used to Assess Water Quality: Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead. Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 8.1 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-04 (Oxn_CI-04_Edison Canal). Temporal Representation: The samples were collected between the dates of 2018-10-08 and 2018-10-08 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140625, Lead	Region 4
Edison Canal

LOE ID: 263007 Pollutant: Lead LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Dissolved Beneficial Use: Marine Habitat Number of Samples: 1 Number of Exceedances: 0 Data and Information Type: PHYSICAL/CHEMICAL MONITORING Data Used to Assess Water Quality: Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead. Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 8.1 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-29 (Oxn_CI-29_Edison Canal). Temporal Representation: The samples were collected between the dates of 2018-10-09 and 2018-10-09 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140625, Lead	Region 4
Edison Canal

LOE ID: 263033 Pollutant: Lead LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Dissolved Beneficial Use: Marine Habitat Number of Samples: 1 Number of Exceedances: 0 Data and Information Type: PHYSICAL/CHEMICAL MONITORING Data Used to Assess Water Quality: Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Lead. Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The dissolved lead criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 8.1 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-30 (Oxn_CI-30_Edison Canal). Temporal Representation: The samples were collected between the dates of 2018-10-09 and 2018-10-09 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140626	Region 4
Edison Canal

Pollutant:	Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
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 this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Listing Extent:

Line of Evidence (LOE) for Decision ID 140626, Lindane/gamma Hexachlorocyclohexane (gamma-HCH)	Region 4
Edison Canal

LOE ID:

262029

Pollutant:

Lindane/gamma Hexachlorocyclohexane (gamma-HCH)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-05).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-02 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	149386	Region 4
Edison Canal

Pollutant:	Mercury
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 149386, Mercury	Region 4
Edison Canal

LOE ID:

263180

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

National Recommended Water Quality Criteria Continuous Concentration (4-day average concentrations) for saltwater aquatic organisms exposure to total mercury is 0.94 ug/L.

Guideline Reference:

National Recom


DECISION ID	149386	Region 4
Edison Canal

Pollutant:	Mercury
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 149386, Mercury	Region 4
Edison Canal

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149386, Mercury	Region 4
Edison Canal

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149386, Mercury	Region 4
Edison Canal

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149386, Mercury	Region 4
Edison Canal

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149386, Mercury	Region 4
Edison Canal

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-08 and 2018-10-08

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149386, Mercury	Region 4
Edison Canal

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149386, Mercury	Region 4
Edison Canal

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

ft" valign="top" width="67%">Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

National Recommended Water Quality Criteria Continuous Concentration (4-day average concentrations) for saltwater aquatic organisms exposure to total mercury is 0.94 ug/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-08 and 2018-10-08

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149386, Mercury	Region 4
Edison Canal

LOE ID:

263238

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

National Recommended Water Quality Criteria Continuous Concentration (4-day average concentrations) for saltwater aquatic organisms exposure to total mercury is 0.94 ug/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149386, Mercury	Region 4
Edison Canal

LOE ID:

263228

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

National Recommended Water Quality Criteria Continuous Concentration (4-day average concentrations) for saltwater aquatic organisms exposure to total mercury is 0.94 ug/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140628	Region 4
Edison Canal

Pollutant:	Methoxychlor
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 this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Listing Extent:

Line of Evidence (LOE) for Decision ID 140628, Methoxychlor	Region 4
Edison Canal

LOE ID:

263649

Pollutant:

Methoxychlor

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 4 samples exceeded the water quality threshold for Methoxychlor. Although a total of 5 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The USEPA national ambient water quality criterion for saltwater aquatic life Criterion Continuous Concentration (CCC) expressed as a 4-day average for methoxychlor is 0.03 ug/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-05).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-02 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140628	Region 4
Edison Canal

Pollutant:	Methoxychlor
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 this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Listing Extent:

Line of Evidence (LOE) for Decision ID 140628, Methoxychlor	Region 4
Edison Canal

LOE ID:

263649

Pollutant:

Methoxychlor

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 4 samples exceeded the water quality threshold for Methoxychlor. Although a total of 5 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The USEPA national ambient water quality criterion for saltwater aquatic life Criterion Continuous Concentration (CCC) expressed as a 4-day average for methoxychlor is 0.03 ug/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-05).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-02 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140629	Region 4
Edison Canal

Pollutant:	Mirex
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 140629, Mirex	Region 4
Edison Canal

LOE ID:

263499

Pollutant:

Mirex

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Mirex. Although a total of 5 samples were collected, 5 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The USEPA national recommended criterion continuous concentration for mirex for the protection of saltwater aquatic life is 0.001 µg/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-02 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140629, Mirex	Region 4
Edison Canal

LOE ID:

263520

Pollutant:

Mirex

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Mirex. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The USEPA national recommended criterion continuous concentration for mirex for the protection of saltwater aquatic life is 0.001 µg/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140629, Mirex

Region 4

Edison Canal<


DECISION ID	140629	Region 4
Edison Canal

Pollutant:	Mirex
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 140629, Mirex	Region 4
Edison Canal

LOE ID:

263499

Pollutant:

Mirex

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Mirex. Although a total of 5 samples were collected, 5 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The USEPA national recommended criterion continuous concentration for mirex for the protection of saltwater aquatic life is 0.001 µg/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-02 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140629, Mirex	Region 4
Edison Canal

LOE ID:

263520

Pollutant:

Mirex

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Mirex. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The USEPA national recommended criterion continuous concentration for mirex for the protection of saltwater aquatic life is 0.001 µg/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140629, Mirex	Region 4
Edison Canal

LOE ID:

263570

Pollutant:

Mirex

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Mirex. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The USEPA national recommended criterion continuous concentration for mirex for the protection of saltwater aquatic life is 0.001 µg/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140629, Mirex	Region 4
Edison Canal

LOE ID:

263662

Pollutant:

Mirex

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Mirex. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

LOE ID:

263570

Pollutant:

Mirex

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Mirex. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The USEPA national recommended criterion continuous concentration for mirex for the protection of saltwater aquatic life is 0.001 µg/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140629, Mirex	Region 4
Edison Canal

LOE ID:

263662

Pollutant:

Mirex

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Mirex. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The USEPA national recommended criterion continuous concentration for mirex for the protection of saltwater aquatic life is 0.001 µg/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140629, Mirex	Region 4
Edison Canal

LOE ID:

263480

Pollutant:

Mirex

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Mirex. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The USEPA national recommended criterion continuous concentration for mirex for the protection of saltwater aquatic life is 0.001 µg/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

td>

SWAMP Data:

Non-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.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The USEPA national recommended criterion continuous concentration for mirex for the protection of saltwater aquatic life is 0.001 µg/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140629, Mirex	Region 4
Edison Canal

LOE ID:

263480

Pollutant:

Mirex

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Mirex. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The USEPA national recommended criterion continuous concentration for mirex for the protection of saltwater aquatic life is 0.001 µg/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140630	Region 4
Edison Canal

Pollutant:	Nickel
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 this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Listing Extent:

Line of Evidence (LOE) for Decision ID 140630, Nickel	Region 4
Edison Canal

LOE ID:

264051

Pollutant:

Nickel

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 8.2 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

DECISION ID

140630

Region 4

Edison Canal

Pollutant:	Nickel
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 this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Listing Extent:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Line of Evidence (LOE) for Decision ID 140630, Nickel	Region 4
Edison Canal

LOE ID:

264051

Pollutant:

Nickel

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 8.2 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140630, Nickel	Region 4
Edison Canal

LOE ID:

263786

Pollutant:

Nickel

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 8.2 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140630, Nickel	Region 4
Edison Canal

LOE ID:

263986

Pollutant:

Nickel

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140630, Nickel	Region 4
Edison Canal

LOE ID:

263786

Pollutant:

Nickel

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 8.2 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140630, Nickel	Region 4
Edison Canal

LOE ID:

263986

Pollutant:

Nickel

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 8.2 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140630, Nickel	Region 4
Edison Canal

LOE ID:

264095

Pollutant:

Nickel

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 8.2 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140630, Nickel	Region 4
Edison Canal

LOE ID:

264096

Pollutant:

Nickel

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 8.2 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-08 and 2018-10-08

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

tr> Data Used to Assess Water Quality: Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel. Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 8.2 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-29 (Oxn_CI-29_Edison Canal). Temporal Representation: The samples were collected between the dates of 2018-10-09 and 2018-10-09 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140630, Nickel	Region 4
Edison Canal

LOE ID: 264095 Pollutant: Nickel LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Dissolved Beneficial Use: Marine Habitat Number of Samples: 1 Number of Exceedances: 0 Data and Information Type: PHYSICAL/CHEMICAL MONITORING Data Used to Assess Water Quality: Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel. Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 8.2 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-30 (Oxn_CI-30_Edison Canal). Temporal Representation: The samples were collected between the dates of 2018-10-09 and 2018-10-09 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140630, Nickel	Region 4
Edison Canal

LOE ID: 264096 Pollutant: Nickel LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Dissolved Beneficial Use: Marine Habitat Number of Samples: 1 Number of Exceedances: 0 Data and Information Type: PHYSICAL/CHEMICAL MONITORING Data Used to Assess Water Quality: Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Nickel. Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The dissolved nickel criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 8.2 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-04 (Oxn_CI-04_Edison Canal). Temporal Representation: The samples were collected between the dates of 2018-10-08 and 2018-10-08 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	149387	Region 4
Edison Canal

Pollutant:	Nitrogen, Nitrate
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 149387, Nitrogen, Nitrate	Region 4
Edison Canal

LOE ID:

302315

Pollutant:

Nitrogen, Nitrate

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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 (page 3-34) states that: Waters shall not exceed 10 mg/L as nitrate-nitrogen (NO3-N).

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

DECISION ID

149387

Region 4

Edison Canal

Pollutant:	Nitrogen, Nitrate
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 149387, Nitrogen, Nitrate	Region 4
Edison Canal

LOE ID:

302315

Pollutant:

Nitrogen, Nitrate

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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 (page 3-34) states that: Waters shall not exceed 10 mg/L as nitrate-nitrogen (NO3-N).

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149387, Nitrogen, Nitrate	Region 4
Edison Canal

LOE ID:

302380

Pollutant:

Nitrogen, Nitrate

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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 (page 3-34) states that: Waters shall not exceed 10 mg/L as nitrate-nitrogen (NO3-N).

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-08 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149387, Nitrogen, Nitrate	Region 4
Edison Canal

LOE ID:

302248

Pollutant:

Nitrogen, Nitrate

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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 (page 3-34) states that: Waters shall not exceed 10 mg/L as nitrate-nitrogen (NO3-N).

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149387, Nitrogen, Nitrate	Region 4
Edison Canal

LOE ID:

302320

Pollutant:

Nitrogen, Nitrate

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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 (page 3-34) states that: Waters shall not exceed 10 mg/L as nitrate-nitrogen (NO3-N).

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149387, Nitrogen, Nitrate	Region 4
Edison Canal

LOE ID:

302446

Pollutant:

Nitrogen, Nitrate

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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 (page 3-34) states that: Waters shall not exceed 10 mg/L as nitrate-nitrogen (NO3-N).

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

">The samples were collected between the dates of 2018-10-09 and 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149387, Nitrogen, Nitrate	Region 4
Edison Canal

LOE ID: 302380 Pollutant: Nitrogen, Nitrate LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Nitrate as N. Data Reference: Field, WQ data from the California Environmental Data Exchange Network 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 (page 3-34) states that: Waters shall not exceed 10 mg/L as nitrate-nitrogen (NO3-N). Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan Evaluation Guideline: Guideline Reference: Spatial Representation: The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal). Temporal Representation: The samples were collected between the dates of 2018-10-08 and 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149387, Nitrogen, Nitrate	Region 4
Edison Canal

LOE ID: 302248 Pollutant: Nitrogen, Nitrate LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Nitrate as N. Data Reference: Field, WQ data from the California Environmental Data Exchange Network 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 (page 3-34) states that: Waters shall not exceed 10 mg/L as nitrate-nitrogen (NO3-N). Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan Evaluation Guideline: Guideline Reference: Spatial Representation: The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal). Temporal Representation: The samples were collected between the dates of 2018-10-09 and 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149387, Nitrogen, Nitrate	Region 4
Edison Canal

LOE ID: 302320 Pollutant: Nitrogen, Nitrate LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Nitrate as N. Data Reference: Field, WQ data from the California Environmental Data Exchange Network 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 (page 3-34) states that: Waters shall not exceed 10 mg/L as nitrate-nitrogen (NO3-N). Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan Evaluation Guideline: Guideline Reference: Spatial Representation: The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal). Temporal Representation: The samples were collected between the dates of 2018-10-09 and 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 149387, Nitrogen, Nitrate	Region 4
Edison Canal

LOE ID: 302446 Pollutant: Nitrogen, Nitrate LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Nitrate as N. Data Reference: Field, WQ data from the California Environmental Data Exchange Network 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 (page 3-34) states that: Waters shall not exceed 10 mg/L as nitrate-nitrogen (NO3-N). Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan Evaluation Guideline: Guideline Reference: Spatial Representation: The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal). Temporal Representation: The samples were collected between the dates of 2018-10-09 and 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	151955	Region 4
Edison Canal

Pollutant:	Oxygen, Dissolved
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:	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. Ten 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. 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. 4 of 54 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 151955, Oxygen, Dissolved	Region 4
Edison Canal

LOE ID:

307789

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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 (page 3-39) states that: At a minimum (see specifics below), the mean annual dissolved oxygen concentration of all waters shall be greater than 7 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-29 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 151955, Oxygen, Dissolved	Region 4
Edison Canal

LOE ID:

308512

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-29 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 151955, Oxygen, Dissolved	Region 4
Edison Canal

LOE ID:

308391

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Ha


DECISION ID	151955	Region 4
Edison Canal

Pollutant:	Oxygen, Dissolved
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:	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. Ten 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. 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. 4 of 54 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 151955, Oxygen, Dissolved	Region 4
Edison Canal

LOE ID:

307789

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 2 of 37 samples exceeded the water quality threshold for Oxygen, Dissolved.

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: At a minimum... no single determination shall be less than 5.0 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-06-23 and 2019-04-15

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 151955, Oxygen, Dissolved	Region 4
Edison Canal

LOE ID:

308172

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: At a minimum... no single determination shall be less than 5.0 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-22 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 151955, Oxygen, Dissolved	Region 4
Edison Canal

LOE ID:

307790

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: At a minimum... no single determination shall be less than 5.0 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-22 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 151955, Oxygen, Dissolved	Region 4
Edison Canal

LOE ID:

308379

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: At a minimum... no single determination shall be less than 5.0 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-06-23 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 151955, Oxygen, Dissolved	Region 4
Edison Canal

LOE ID:

307793

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: At a minimum... no single determination shall be less than 5.0 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-22 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 151955, Oxygen, Dissolved	Region 4
Edison Canal

LOE ID:

307788

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-29 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 151955, Oxygen, Dissolved	Region 4
Edison Canal

LOE ID:

308512

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-29 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 151955, Oxygen, Dissolved	Region 4
Edison Canal

LOE ID:

308391

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Han="top" width="33%">Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-29 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 151955, Oxygen, Dissolved	Region 4
Edison Canal

LOE ID:

308265

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-29 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 151955, Oxygen, Dissolved	Region 4
Edison Canal

LOE ID:

307965

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-12-03 and 2019-04-15

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

bitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: At a minimum... no single determination shall be less than 5.0 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-06-23 and 2019-04-15

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 151955, Oxygen, Dissolved	Region 4
Edison Canal

LOE ID:

308172

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: At a minimum... no single determination shall be less than 5.0 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-22 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 151955, Oxygen, Dissolved	Region 4
Edison Canal

LOE ID:

307790

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: At a minimum... no single determination shall be less than 5.0 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-22 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 151955, Oxygen, Dissolved	Region 4
Edison Canal

LOE ID:

308379

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

DECISION ID

140635

Region 4

Edison Canal

Pollutant:	PCBs (Polychlorinated biphenyls)
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 140635, PCBs (Polychlorinated biphenyls)	Region 4
Edison Canal

LOE ID:

264459

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for PCBs (Polychlorinated biphenyls). 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The PCB, total aroclors criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.03 ug/L. This value corresponds to the sum of aroclors 1242, 1254, 1221, 1232, 1248, 1260, and 1016 (California Toxics Rule, 2000).

Objective/Criterion Reference:

Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federawidth="33%">SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Water Quality Control Plan for the Los Angeles Region states that: At a minimum... no single determination shall be less than 5.0 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-06-23 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 151955, Oxygen, Dissolved	Region 4
Edison Canal

LOE ID:

307793

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network 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: At a minimum... no single determination shall be less than 5.0 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-22 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 151955, Oxygen, Dissolved	Region 4
Edison Canal

LOE ID:

307788

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140635, PCBs (Polychlorinated biphenyls)	Region 4
Edison Canal

LOE ID:

264541

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for PCBs (Polychlorinated biphenyls). 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140635, PCBs (Polychlorinated biphenyls)	Region 4
Edison Canal

LOE ID:

264463

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for PCBs (Polychlorinated biphenyls). 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-10-08

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140635, PCBs (Polychlorinated biphenyls)	Region 4
Edison Canal

LOE ID:

264576

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for PCBs (Polychlorinated biphenyls). Although a total of 2 samples were collected, 2 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-02 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

n="top" width="33%">Pollutant: Oxygen, Dissolved LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine Habitat Number of Samples: 1 Number of Exceedances: 0 Data and Information Type: PHYSICAL/CHEMICAL MONITORING Data Used to Assess Water Quality: Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved. Data Reference: Field, WQ data from the California Environmental Data Exchange Network 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 (page 3-39) states that: At a minimum (see specifics below), the mean annual dissolved oxygen concentration of all waters shall be greater than 7 mg/L. Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan Evaluation Guideline: Guideline Reference: Spatial Representation: The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal). Temporal Representation: The samples were collected between the dates of 2018-11-29 and 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 151955, Oxygen, Dissolved	Region 4
Edison Canal

LOE ID: 308265 Pollutant: Oxygen, Dissolved LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved. Data Reference: Field, WQ data from the California Environmental Data Exchange Network 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 (page 3-39) states that: At a minimum (see specifics below), the mean annual dissolved oxygen concentration of all waters shall be greater than 7 mg/L. Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan Evaluation Guideline: Guideline Reference: Spatial Representation: The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal). Temporal Representation: The samples were collected between the dates of 2018-11-29 and 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 151955, Oxygen, Dissolved	Region 4
Edison Canal

LOE ID: 307965 Pollutant: Oxygen, Dissolved LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Oxygen, Dissolved. Data Reference: Field, WQ data from the California Environmental Data Exchange Network 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 (page 3-39) states that: At a minimum (see specifics below), the mean annual dissolved oxygen concentration of all waters shall be greater than 7 mg/L. Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan Evaluation Guideline: Guideline Reference: Spatial Representation: The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal). Temporal Representation: The samples were collected between the dates of 2018-12-03 and 2019-04-15 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140633	Region 4
Edison Canal

Pollutant:	Pentachlorophenol (PCP)
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 140633, Pentachlorophenol (PCP)	Region 4
Edison Canal

LOE ID:

264646

Pollutant:

Pentachlorophenol (PCP)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pentachlorophenol. 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The pentachlorophenol criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 7.9 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2019-12-04 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140635	Region 4
Edison Canal

Pollutant:	PCBs (Polychlorinated biphenyls)
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 140635, PCBs (Polychlorinated biphenyls)	Region 4
Edison Canal

LOE ID:

264459

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for PCBs (Polychlorinated biphenyls). 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federa


DECISION ID	140636	Region 4
Edison Canal

Pollutant:	Selenium
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 this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Listing Extent:

Line of Evidence (LOE) for Decision ID 140636, Selenium	Region 4
Edison Canal

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 71 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140635, PCBs (Polychlorinated biphenyls)	Region 4
Edison Canal

LOE ID:

264541

Pollutant:

PCBs (Polychlorinated biphenyls)

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for PCBs (Polychlorinated biphenyls). 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140635, PCBs (Polychlorinated biphenyls)	Region 4
Edison Canal

LOE ID:

264463

Pollutant:

PCBs (Polychlorinated biphenyls)

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for PCBs (Polychlorinated biphenyls). 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-10-08

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140635, PCBs (Polychlorinated biphenyls)	Region 4
Edison Canal

LOE ID:

264576

Pollutant:

PCBs (Polychlorinated biphenyls)

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for PCBs (Polychlorinated biphenyls). Although a total of 2 samples were collected, 2 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-02 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140633	Region 4
Edison Canal

Pollutant:	Pentachlorophenol (PCP)
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 140633, Pentachlorophenol (PCP)	Region 4
Edison Canal

LOE ID:

264646

Pollutant:

Pentachlorophenol (PCP)

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Pentachlorophenol. 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The pentachlorophenol criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 7.9 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2019-12-04 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

t" valign="top" width="67%">The samples were collected between the dates of 2018-10-08 and 2018-10-08

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140636, Selenium	Region 4
Edison Canal

LOE ID:

266326

Pollutant:

Selenium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 71 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140636, Selenium	Region 4
Edison Canal

LOE ID:

266184

Pollutant:

Selenium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 71 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140636, Selenium	Region 4
Edison Canal

LOE ID:

266345

Pollutant:

Selenium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 71 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140636, Selenium	Region 4
Edison Canal

LOE ID:

265852

Pollutant:

Selenium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 71 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140636	Region 4
Edison Canal

Pollutant:	Selenium
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 this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Listing Extent:

Line of Evidence (LOE) for Decision ID 140636, Selenium	Region 4
Edison Canal

LOE ID:

265987

Pollutant:

Selenium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 71 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-08 and 2018-10-08

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140636, Selenium	Region 4
Edison Canal

LOE ID:

266326

Pollutant:

Selenium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 71 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140636, Selenium	Region 4
Edison Canal

LOE ID:

266184

Pollutant:

Selenium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING


DECISION ID	140637	Region 4
Edison Canal

Pollutant:	Silver
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 140637, Silver	Region 4
Edison Canal

LOE ID:

266518

Pollutant:

Silver

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved silver criterion maximum concentration (CMC) to protect aquatic life in saltwater is 1.9 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.

Objective/Criterion Reference:

&nbs

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 71 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140636, Selenium	Region 4
Edison Canal

LOE ID:

266345

Pollutant:

Selenium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 71 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140636, Selenium	Region 4
Edison Canal

LOE ID:

265852

Pollutant:

Selenium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 71 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

p; Evaluation Guideline: Guideline Reference: Spatial Representation: The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-08 to 2018-10-08 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140637, Silver	Region 4
Edison Canal

LOE ID: 266474 Pollutant: Silver LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Dissolved Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The dissolved silver criterion maximum concentration (CMC) to protect aquatic life in saltwater is 1.9 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. Objective/Criterion Reference: 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: Oxn_CI-28 (Oxn_CI-28_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-09 to 2018-10-09 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140637, Silver	Region 4
Edison Canal

LOE ID: 266511 Pollutant: Silver LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Dissolved Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The dissolved silver criterion maximum concentration (CMC) to protect aquatic life in saltwater is 1.9 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. Objective/Criterion Reference: 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: Oxn_CI-05 (Oxn_CI-05_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-09 to 2018-10-09 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140637, Silver	Region 4
Edison Canal

LOE ID: 266412 Pollutant: Silver LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Dissolved Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The dissolved silver criterion maximum concentration (CMC) to protect aquatic life in saltwater is 1.9 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. Objective/Criterion Reference: 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: Oxn_CI-30 (Oxn_CI-30_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-09 to 2018-10-09 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140637, Silver	Region 4
Edison Canal

LOE ID: 266393 Pollutant: Silver LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Dissolved Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The dissolved silver criterion maximum concentration (CMC) to protect aquatic life in saltwater is 1.9 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. Objective/Criterion Reference: 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: Oxn_CI-29 (Oxn_CI-29_Edison Canal). Temporal Representation: Data for this waterbody were collected over the date range 2018-10-09 to 2018-10-09 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140637	Region 4
Edison Canal

Pollutant:	Silver
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 140637, Silver	Region 4
Edison Canal

LOE ID:

266518

Pollutant:

Silver

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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DECISION ID	140638	Region 4
Edison Canal

Pollutant:	Toxaphene
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:

LOE Subgroup:

Line of Evidence (LOE) for Decision ID 140638, Toxaphene	Region 4
Edison Canal

LOE ID:

267787

Pollutant:

Toxaphene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Toxaphene. Although a total of 4 samples were collected, 4 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The toxaphene criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0002 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-10-08

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140637, Silver	Region 4
Edison Canal

LOE ID:

266474

Pollutant:

Silver

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140637, Silver	Region 4
Edison Canal

LOE ID:

266511

Pollutant:

Silver

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-02 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140638, Toxaphene	Region 4
Edison Canal

LOE ID:

267686

Pollutant:

Toxaphene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Toxaphene. Although a total of 2 samples were collected, 2 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The toxaphene criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0002 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-11-22

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140638, Toxaphene	Region 4
Edison Canal

LOE ID:

267861

Pollutant:

Toxaphene

LOE Subgroup:

Pollutant-Water

Matrix:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140637, Silver	Region 4
Edison Canal

LOE ID:

266412

Pollutant:

Silver

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140637, Silver	Region 4
Edison Canal

LOE ID:

266393

Pollutant:

Silver

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

td align="left" valign="top" width="67%">Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Toxaphene. Although a total of 2 samples were collected, 2 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The toxaphene criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0002 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-22

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140638, Toxaphene	Region 4
Edison Canal

LOE ID:

267674

Pollutant:

Toxaphene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Toxaphene. 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The toxaphene criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0002 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140638, Toxaphene	Region 4
Edison Canal

LOE ID:

267839

Pollutant:

Toxaphene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Toxaphene. Although a total of 2 samples were collected, 2 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The toxaphene criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0002 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-22

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140638	Region 4
Edison Canal

Pollutant:	Toxaphene
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 140638, Toxaphene	Region 4
Edison Canal

LOE ID:

267787

Pollutant:

Toxaphene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Toxaphene. Although a total of 4 samples were collected, 4 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The toxaphene criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0002 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-02 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140638, Toxaphene	Region 4
Edison Canal

LOE ID:

267686

Pollutant:

Toxaphene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Toxaphene. Although a total of 2 samples were collected, 2 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The toxaphene criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0002 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-11-22

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140638, Toxaphene	Region 4
Edison Canal

LOE ID:

267861

Pollutant:

Toxaphene

LOE Subgroup:

Pollutant-Water

Matrix:


DECISION ID	140639	Region 4
Edison Canal

Pollutant:	Zinc
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 this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Listing Extent:

Line of Evidence (LOE) for Decision ID 140639, Zinc	Region 4
Edison Canal

LOE ID:

268351

Pollutant:

Zinc

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 81 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Toxaphene. Although a total of 2 samples were collected, 2 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The toxaphene criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0002 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-22

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140638, Toxaphene	Region 4
Edison Canal

LOE ID:

267674

Pollutant:

Toxaphene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Toxaphene. 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The toxaphene criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0002 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140638, Toxaphene	Region 4
Edison Canal

LOE ID:

267839

Pollutant:

Toxaphene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Toxaphene. Although a total of 2 samples were collected, 2 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The toxaphene criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 0.0002 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-22

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

width="67%">The samples were collected between the dates of 2018-10-09 and 2018-10-09 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140639, Zinc	Region 4
Edison Canal

LOE ID: 268303 Pollutant: Zinc LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Dissolved Beneficial Use: Marine Habitat Number of Samples: 1 Number of Exceedances: 0 Data and Information Type: PHYSICAL/CHEMICAL MONITORING Data Used to Assess Water Quality: Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Zinc. Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 81 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-29 (Oxn_CI-29_Edison Canal). Temporal Representation: The samples were collected between the dates of 2018-10-09 and 2018-10-09 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140639, Zinc	Region 4
Edison Canal

LOE ID: 268347 Pollutant: Zinc LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Dissolved Beneficial Use: Marine Habitat Number of Samples: 1 Number of Exceedances: 0 Data and Information Type: PHYSICAL/CHEMICAL MONITORING Data Used to Assess Water Quality: Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Zinc. Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 81 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-05 (Oxn_CI-05_Edison Canal). Temporal Representation: The samples were collected between the dates of 2018-10-09 and 2018-10-09 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140639, Zinc	Region 4
Edison Canal

LOE ID: 268336 Pollutant: Zinc LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Dissolved Beneficial Use: Marine Habitat Number of Samples: 1 Number of Exceedances: 0 Data and Information Type: PHYSICAL/CHEMICAL MONITORING Data Used to Assess Water Quality: Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Zinc. Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 81 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-30 (Oxn_CI-30_Edison Canal). Temporal Representation: The samples were collected between the dates of 2018-10-09 and 2018-10-09 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140639, Zinc	Region 4
Edison Canal

LOE ID: 268333 Pollutant: Zinc LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Dissolved Beneficial Use: Marine Habitat Number of Samples: 1 Number of Exceedances: 0 Data and Information Type: PHYSICAL/CHEMICAL MONITORING Data Used to Assess Water Quality: Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Zinc. Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 81 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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: Oxn_CI-04 (Oxn_CI-04_Edison Canal). Temporal Representation: The samples were collected between the dates of 2018-10-08 and 2018-10-08 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140639	Region 4
Edison Canal

Pollutant:	Zinc
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 this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Listing Extent:

Line of Evidence (LOE) for Decision ID 140639, Zinc	Region 4
Edison Canal

LOE ID:

268351

Pollutant:

Zinc

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 81 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140639, Zinc	Region 4
Edison Canal

LOE ID:

268303

Pollutant:

Zinc

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 81 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140639, Zinc	Region 4
Edison Canal

LOE ID:

268347

Pollutant:

Zinc

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

DECISION ID

140618

Region 4

Edison Canal

Pollutant:	alpha-Endosulfan (Endosulfan 1)
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 this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Listing Extent:

Data Used to Assess Water Quality:

Line of Evidence (LOE) for Decision ID 140618, alpha-Endosulfan (Endosulfan 1)	Region 4
Edison Canal

LOE ID:

260875

Pollutant:

alpha-Endosulfan (Endosulfan 1)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Endosulfan I. Although a total of 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The endosulfan I (alpha-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0087 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 81 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140639, Zinc	Region 4
Edison Canal

LOE ID:

268336

Pollutant:

Zinc

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 81 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-09 and 2018-10-09

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140639, Zinc	Region 4
Edison Canal

LOE ID:

268333

Pollutant:

Zinc

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved zinc criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saline water is 81 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-10-08 and 2018-10-08

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

r> Guideline Reference: Spatial Representation: The samples were collected at 1 monitoring site (Oxn_CI-28). Temporal Representation: Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140618, alpha-Endosulfan (Endosulfan 1)	Region 4
Edison Canal

LOE ID: 260831 Pollutant: alpha-Endosulfan (Endosulfan 1) LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Endosulfan I. Although a total of 3 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The endosulfan I (alpha-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0087 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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 (Oxn_CI-30). Temporal Representation: Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140618, alpha-Endosulfan (Endosulfan 1)	Region 4
Edison Canal

LOE ID: 260830 Pollutant: alpha-Endosulfan (Endosulfan 1) LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Endosulfan I. Although a total of 3 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The endosulfan I (alpha-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0087 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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 (Oxn_CI-29). Temporal Representation: Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140618, alpha-Endosulfan (Endosulfan 1)	Region 4
Edison Canal

LOE ID: 260717 Pollutant: alpha-Endosulfan (Endosulfan 1) LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine 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 Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Endosulfan I. Although a total of 3 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The endosulfan I (alpha-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0087 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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 (Oxn_CI-04). Temporal Representation: Data for this waterbody was collected over the date range 2018-10-08 to 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140618, alpha-Endosulfan (Endosulfan 1)	Region 4
Edison Canal

LOE ID: 260920 Pollutant: alpha-Endosulfan (Endosulfan 1) LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Total Beneficial Use: Marine Habitat Number of Samples: 3 Number of Exceedances: 0 Data and Information Type: PHYSICAL/CHEMICAL MONITORING Data Used to Assess Water Quality: Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 3 samples exceeded the water quality threshold for Endosulfan I. Although a total of 5 samples were collected, 2 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: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: The endosulfan I (alpha-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0087 ug/L (California Toxics Rule, 2000). Objective/Criterion Reference: 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 (Oxn_CI-05). Temporal Representation: Data for this waterbody was collected over the date range 2018-10-02 to 2019-12-04 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140618	Region 4
Edison Canal

Pollutant:	alpha-Endosulfan (Endosulfan 1)
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 this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Listing Extent:

Line of Evidence (LOE) for Decision ID 140618, alpha-Endosulfan (Endosulfan 1)	Region 4
Edison Canal

LOE ID:

260875

Pollutant:

alpha-Endosulfan (Endosulfan 1)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Endosulfan I. Although a total of 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The endosulfan I (alpha-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0087 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-28).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140618, alpha-Endosulfan (Endosulfan 1)	Region 4
Edison Canal

LOE ID:

260831

Pollutant:

alpha-Endosulfan (Endosulfan 1)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Endosulfan I. Although a total of 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The endosulfan I (alpha-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0087 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-30).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140618, alpha-Endosulfan (Endosulfan 1)	Region 4
Edison Canal

LOE ID:

260830

Pollutant:

alpha-Endosulfan (Endosulfan 1)

LOE Subgroup:

Pollutant-Water

Matrix:


DECISION ID	140632	Region 4
Edison Canal

Pollutant:	beta-Endosulfan (Endosulfan 2)
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 this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Listing Extent:

Line of Evidence (LOE) for Decision ID 140632, beta-Endosulfan (Endosulfan 2)	Region 4
Edison Canal

LOE ID:

260838

Pollutant:

beta-Endosulfan (Endosulfan 2)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Endosulfan II. Although a total of 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The endosulfan II (beta-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0087 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Endosulfan I. Although a total of 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The endosulfan I (alpha-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0087 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-29).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140618, alpha-Endosulfan (Endosulfan 1)	Region 4
Edison Canal

LOE ID:

260717

Pollutant:

alpha-Endosulfan (Endosulfan 1)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Endosulfan I. Although a total of 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The endosulfan I (alpha-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0087 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-04).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-08 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140618, alpha-Endosulfan (Endosulfan 1)	Region 4
Edison Canal

LOE ID:

260920

Pollutant:

alpha-Endosulfan (Endosulfan 1)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 3 samples exceeded the water quality threshold for Endosulfan I. Although a total of 5 samples were collected, 2 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The endosulfan I (alpha-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0087 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-05).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-02 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-28).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140632, beta-Endosulfan (Endosulfan 2)	Region 4
Edison Canal

LOE ID:

260745

Pollutant:

beta-Endosulfan (Endosulfan 2)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 3 samples exceeded the water quality threshold for Endosulfan II. Although a total of 5 samples were collected, 2 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The endosulfan II (beta-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0087 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-05).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-02 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140632, beta-Endosulfan (Endosulfan 2)	Region 4
Edison Canal

LOE ID:

260772

Pollutant:

beta-Endosulfan (Endosulfan 2)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Endosulfan II. Although a total of 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The endosulfan II (beta-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0087 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-30).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140632, beta-Endosulfan (Endosulfan 2)	Region 4
Edison Canal

LOE ID:

260771

Pollutant:

beta-Endosulfan (Endosulfan 2)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Endosulfan II. Although a total of 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The endosulfan II (beta-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0087 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-04).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-08 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140632, beta-Endosulfan (Endosulfan 2)	Region 4
Edison Canal

LOE ID:

260768

Pollutant:

beta-Endosulfan (Endosulfan 2)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Endosulfan II. Although a total of 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The endosulfan II (beta-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0087 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-29).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140632	Region 4
Edison Canal

Pollutant:	beta-Endosulfan (Endosulfan 2)
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 this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Listing Extent:

Line of Evidence (LOE) for Decision ID 140632, beta-Endosulfan (Endosulfan 2)	Region 4
Edison Canal

LOE ID:

260838

Pollutant:

beta-Endosulfan (Endosulfan 2)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Endosulfan II. Although a total of 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The endosulfan II (beta-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0087 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-28).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140632, beta-Endosulfan (Endosulfan 2)	Region 4
Edison Canal

LOE ID:

260745

Pollutant:

beta-Endosulfan (Endosulfan 2)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 3 samples exceeded the water quality threshold for Endosulfan II. Although a total of 5 samples were collected, 2 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The endosulfan II (beta-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0087 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-05).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-02 to 2019-12-04

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140632, beta-Endosulfan (Endosulfan 2)	Region 4
Edison Canal

LOE ID:

260772

Pollutant:

beta-Endosulfan (Endosulfan 2)

LOE Subgroup:

Pollutant-Water

Matrix:


DECISION ID	140634	Region 4
Edison Canal

Pollutant:	pH
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 this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Listing Extent:

Line of Evidence (LOE) for Decision ID 140634, pH	Region 4
Edison Canal

LOE ID:

265396

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-29 and 2018-11-29

Environmental Condition

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Endosulfan II. Although a total of 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The endosulfan II (beta-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0087 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-30).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140632, beta-Endosulfan (Endosulfan 2)	Region 4
Edison Canal

LOE ID:

260771

Pollutant:

beta-Endosulfan (Endosulfan 2)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Endosulfan II. Although a total of 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The endosulfan II (beta-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0087 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-04).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-08 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140632, beta-Endosulfan (Endosulfan 2)	Region 4
Edison Canal

LOE ID:

260768

Pollutant:

beta-Endosulfan (Endosulfan 2)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Endosulfan II. Although a total of 3 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:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The endosulfan II (beta-endosulfan) criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in saltwater is 0.0087 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-29).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

s: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140634, pH	Region 4
Edison Canal

LOE ID: 265252 Pollutant: pH LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None Beneficial Use: Marine Habitat Number of Samples: 15 Number of Exceedances: 0 Data and Information Type: PHYSICAL/CHEMICAL MONITORING Data Used to Assess Water Quality: Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 15 samples exceeded the water quality threshold for pH. Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: 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. Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan Evaluation Guideline: Guideline Reference: Spatial Representation: The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal). Temporal Representation: The samples were collected between the dates of 2018-06-29 and 2019-01-10 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140634, pH	Region 4
Edison Canal

LOE ID: 265243 Pollutant: pH LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None Beneficial Use: Marine Habitat Number of Samples: 1 Number of Exceedances: 0 Data and Information Type: PHYSICAL/CHEMICAL MONITORING Data Used to Assess Water Quality: Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH. Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: 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. Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan Evaluation Guideline: Guideline Reference: Spatial Representation: The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal). Temporal Representation: The samples were collected between the dates of 2018-11-29 and 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140634, pH	Region 4
Edison Canal

LOE ID: 265084 Pollutant: pH LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None Beneficial Use: Marine Habitat Number of Samples: 1 Number of Exceedances: 0 Data and Information Type: PHYSICAL/CHEMICAL MONITORING Data Used to Assess Water Quality: Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH. Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: 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. Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan Evaluation Guideline: Guideline Reference: Spatial Representation: The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal). Temporal Representation: The samples were collected between the dates of 2018-11-29 and 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140634, pH	Region 4
Edison Canal

LOE ID: 265143 Pollutant: pH LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None Beneficial Use: Marine Habitat Number of Samples: 1 Number of Exceedances: 0 Data and Information Type: PHYSICAL/CHEMICAL MONITORING Data Used to Assess Water Quality: Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for pH. Data Reference: Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4. SWAMP Data: Non-SWAMP Water Quality Objective/Criterion: 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. Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan Evaluation Guideline: Guideline Reference: Spatial Representation: The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal). Temporal Representation: The samples were collected between the dates of 2018-11-29 and 2018-11-29 Environmental Conditions: QAPP Information: Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY. QAPP Information Reference(s): CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140634	Region 4
Edison Canal

Pollutant:	pH
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 this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Listing Extent:

Line of Evidence (LOE) for Decision ID 140634, pH	Region 4
Edison Canal

LOE ID:

265396

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-29 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140634, pH	Region 4
Edison Canal

LOE ID:

265252

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and results are as follows: 0 of 15 samples exceeded the water quality threshold for pH.

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-06-29 and 2019-01-10

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140634, pH	Region 4
Edison Canal

LOE ID:

265243

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-05 (Oxn_CI-05_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-29 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140634, pH	Region 4
Edison Canal

LOE ID:

265084

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-29 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140634, pH	Region 4
Edison Canal

LOE ID:

265143

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

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.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

The samples were collected between the dates of 2018-11-29 and 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140627	Region 4
Edison Canal

Pollutant:	Malathion
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
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. 1 lines of evidence are available in the administrative record to assess this pollutant. 2 of the 2samples exceed the 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. 2 of the 2samples exceed 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 140627, Malathion	Region 4
Edison Canal

LOE ID:

262872

Pollutant:

Malathion

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Malathion. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The USEPA national ambient water quality criteria for saltwater aquatic life instantaneous maximum for malathion is 0.1 µg/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140627, Malathion	Region 4
Edison Canal

LOE ID:

263001

Pollutant:

Malathion

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the water quality threshold for Malathion. Although a total of 3 samples were collected, 2 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The USEPA national ambient water quality criteria for saltwater aquatic life instantaneous maximum for malathion is 0.1 µg/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-28).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140627, Malathion	Region 4
Edison Canal

LOE ID:

263110

Pollutant:

Malathion

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Malathion. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The USEPA national ambient water quality criteria for saltwater aquatic life instantaneous maximum for malathion is 0.1 µg/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140627, Malathion	Region 4
Edison Canal

LOE ID:

263127

Pollutant:

Malathion

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Malathion. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The USEPA national ambient water quality criteria for saltwater aquatic life instantaneous maximum for malathion is 0.1 µg/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140627, Malathion	Region 4
Edison Canal

LOE ID:

263067

Pollutant:

Malathion

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the water quality threshold for Malathion. Although a total of 4 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The USEPA national ambient water quality criteria for saltwater aquatic life instantaneous maximum for malathion is 0.1 µg/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-05).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-02 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140644	Region 4
Edison Canal

Pollutant:	Permethrin
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
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. 1 lines of evidence are available in the administrative record to assess this pollutant. 4 of 4 samples exceed the 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. 4 of 4 samples exceed 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 140644, Permethrin	Region 4
Edison Canal

LOE ID:

264708

Pollutant:

Permethrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the water quality threshold for Permethrin. Although a total of 3 samples were collected, 2 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The interim criteria maximum concentration to protect aquatic life in saline water is 0.001 ug/L (DFG 00-6, 2000).

Guideline Reference:

Aquatic Life Criteria for Pyrethroid Insecticides (DFG Administrative Report 00-6, 2000)

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-04).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-08 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140644, Permethrin	Region 4
Edison Canal

LOE ID:

264915

Pollutant:

Permethrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal 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 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The interim criteria maximum concentration to protect aquatic life in saline water is 0.001 ug/L (DFG 00-6, 2000).

Guideline Reference:

Aquatic Life Criteria for Pyrethroid Insecticides (DFG Administrative Report 00-6, 2000)

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140644, Permethrin	Region 4
Edison Canal

LOE ID:

264746

Pollutant:

Permethrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the water quality threshold for Permethrin. Although a total of 3 samples were collected, 2 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The interim criteria maximum concentration to protect aquatic life in saline water is 0.001 ug/L (DFG 00-6, 2000).

Guideline Reference:

Aquatic Life Criteria for Pyrethroid Insecticides (DFG Administrative Report 00-6, 2000)

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-05).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-02 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140644, Permethrin	Region 4
Edison Canal

LOE ID:

264879

Pollutant:

Permethrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the water quality threshold for Permethrin. Although a total of 3 samples were collected, 2 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The interim criteria maximum concentration to protect aquatic life in saline water is 0.001 ug/L (DFG 00-6, 2000).

Guideline Reference:

Aquatic Life Criteria for Pyrethroid Insecticides (DFG Administrative Report 00-6, 2000)

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-30).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140644, Permethrin	Region 4
Edison Canal

LOE ID:

264762

Pollutant:

Permethrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the water quality threshold for Permethrin. Although a total of 2 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The interim criteria maximum concentration to protect aquatic life in saline water is 0.001 ug/L (DFG 00-6, 2000).

Guideline Reference:

Aquatic Life Criteria for Pyrethroid Insecticides (DFG Administrative Report 00-6, 2000)

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-29).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140627	Region 4
Edison Canal

Pollutant:	Malathion
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
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. 1 lines of evidence are available in the administrative record to assess this pollutant. 2 of the 2samples exceed the 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. 2 of the 2samples exceed 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 140627, Malathion	Region 4
Edison Canal

LOE ID:

262872

Pollutant:

Malathion

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Malathion. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The USEPA national ambient water quality criteria for saltwater aquatic life instantaneous maximum for malathion is 0.1 µg/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-30 (Oxn_CI-30_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140627, Malathion	Region 4
Edison Canal

LOE ID:

263001

Pollutant:

Malathion

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the water quality threshold for Malathion. Although a total of 3 samples were collected, 2 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The USEPA national ambient water quality criteria for saltwater aquatic life instantaneous maximum for malathion is 0.1 µg/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-28).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140627, Malathion	Region 4
Edison Canal

LOE ID:

263110

Pollutant:

Malathion

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Malathion. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The USEPA national ambient water quality criteria for saltwater aquatic life instantaneous maximum for malathion is 0.1 µg/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-29 (Oxn_CI-29_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140627, Malathion	Region 4
Edison Canal

LOE ID:

263127

Pollutant:

Malathion

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Malathion. Although a total of 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The USEPA national ambient water quality criteria for saltwater aquatic life instantaneous maximum for malathion is 0.1 µg/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-04 (Oxn_CI-04_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-08 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140627, Malathion	Region 4
Edison Canal

LOE ID:

263067

Pollutant:

Malathion

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the water quality threshold for Malathion. Although a total of 4 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The USEPA national ambient water quality criteria for saltwater aquatic life instantaneous maximum for malathion is 0.1 µg/L.

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-05).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-02 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY


DECISION ID	140644	Region 4
Edison Canal

Pollutant:	Permethrin
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
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. 1 lines of evidence are available in the administrative record to assess this pollutant. 4 of 4 samples exceed the 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. 4 of 4 samples exceed 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 140644, Permethrin	Region 4
Edison Canal

LOE ID:

264708

Pollutant:

Permethrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the water quality threshold for Permethrin. Although a total of 3 samples were collected, 2 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The interim criteria maximum concentration to protect aquatic life in saline water is 0.001 ug/L (DFG 00-6, 2000).

Guideline Reference:

Aquatic Life Criteria for Pyrethroid Insecticides (DFG Administrative Report 00-6, 2000)

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-04).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-08 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140644, Permethrin	Region 4
Edison Canal

LOE ID:

264915

Pollutant:

Permethrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal 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 3 samples were collected, 3 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The interim criteria maximum concentration to protect aquatic life in saline water is 0.001 ug/L (DFG 00-6, 2000).

Guideline Reference:

Aquatic Life Criteria for Pyrethroid Insecticides (DFG Administrative Report 00-6, 2000)

Spatial Representation:

The samples were collected at 1 monitoring site: Oxn_CI-28 (Oxn_CI-28_Edison Canal).

Temporal Representation:

Data for this waterbody were collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140644, Permethrin	Region 4
Edison Canal

LOE ID:

264746

Pollutant:

Permethrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the water quality threshold for Permethrin. Although a total of 3 samples were collected, 2 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The interim criteria maximum concentration to protect aquatic life in saline water is 0.001 ug/L (DFG 00-6, 2000).

Guideline Reference:

Aquatic Life Criteria for Pyrethroid Insecticides (DFG Administrative Report 00-6, 2000)

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-05).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-02 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140644, Permethrin	Region 4
Edison Canal

LOE ID:

264879

Pollutant:

Permethrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the water quality threshold for Permethrin. Although a total of 3 samples were collected, 2 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The interim criteria maximum concentration to protect aquatic life in saline water is 0.001 ug/L (DFG 00-6, 2000).

Guideline Reference:

Aquatic Life Criteria for Pyrethroid Insecticides (DFG Administrative Report 00-6, 2000)

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-30).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY

Line of Evidence (LOE) for Decision ID 140644, Permethrin	Region 4
Edison Canal

LOE ID:

264762

Pollutant:

Permethrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Marine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Channel Island Harbor Nutrient Study data for Edison Canal to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the water quality threshold for Permethrin. Although a total of 2 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:

Field, WQ data from the California Environmental Data Exchange Network 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: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The interim criteria maximum concentration to protect aquatic life in saline water is 0.001 ug/L (DFG 00-6, 2000).

Guideline Reference:

Aquatic Life Criteria for Pyrethroid Insecticides (DFG Administrative Report 00-6, 2000)

Spatial Representation:

The samples were collected at 1 monitoring site (Oxn_CI-29).

Temporal Representation:

Data for this waterbody was collected over the date range 2018-10-09 to 2018-11-29

Environmental Conditions:

QAPP Information:

Aquatic Bioassay & Consulting. 2020. CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY.

QAPP Information Reference(s):

CHANNEL ISLANDS HARBOR NUTRIENT SOURCES & SINKS STUDY