Final California 2024 Integrated Report (303(d) List/305(b) Report)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Unspecified

Objective/Criterion Reference:

Evaluation Guideline:

Unspecified

Guideline Reference:

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

Spatial Representation:

Unspecified

Temporal Representation:

Unspecified

Environmental Conditions:

Unspecified

QAPP Information:

Unspecified

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 138889, Chlordane	Region 4
Colorado Lagoon

LOE ID:

267548

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon 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 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The chlordane criterion for the protection of human health from consumption of organisms only is 0.00059 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: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138889, Chlordane	Region 4
Colorado Lagoon

LOE ID:

244707

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 2 samples exceeded the water quality threshold for Chlordane. Data were collected for 2 fish species (1 composite(s) of Mytilus each composed of 65 fish per composite, 1 composite(s) of M. galloprovincialis each composed of 84 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data from 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 3-29) states that: Toxic pollutants shall not be present at levels that will bioaccumulate in aquatic life to levels which are harmful to aquatic life or human health.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The modified OEHHA Fish Contaminant Goal for total chlordane in shellfish tissue is 6.0 ppb. This screening level assumes an average body weight of 70 kg and a consumption rate of 21 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. (Brodberg, R.K., and G.A. Pollock, 1999; Klasing, S., and R. Brodberg, 2008)

Guideline Reference:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M2 (Lagoon side of the Marine Stadium culvert).

Temporal Representation:

Data for this line of evidence were collected between 2018-02-13 and 2018-07-27. When composited fish were collected over multiple days, the first day of fish collection was used as the sample date in the LOE, both for LOE writing, and for averaging period purposes.

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138889, Chlordane	Region 4
Colorado Lagoon

LOE ID:

244602

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 1 of the 2 samples exceeded the water quality threshold for Chlordane. Data were collected for 2 fish species (1 composite(s) of Mytilus each composed of 47 fish per composite, 1 composite(s) of M. galloprovincialis each composed of 51 fish per composite). Of these, 1 species (Mytilus) exceeded the water quality threshold.

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M1 (Colorado Lagoon footbridge).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138889, Chlordane	Region 4
Colorado Lagoon

LOE ID:

244692

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M2 (Lagoon side of the Marine Stadium culvert).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138889, Chlordane	Region 4
Colorado Lagoon

LOE ID:

244745

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 6 samples exceeded the water quality threshold for Chlordane. Data were collected for 6 fish species (1 composite(s) of Top Smelt each composed of 35 fish per composite, 1 composite(s) of Top Smelt each composed of 28 fish per composite, 1 composite(s) of Top Smelt each composed of 26 fish per composite, 1 composite(s) of Top Smelt each composed of 25 fish per composite, 1 composite(s) of Top Smelt each composed of 32 fish per composite, 1 composite(s) of Top Smelt each composed of 39 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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 Academy of Science guidelines (NAS 1972) establish a maximum total Chlordane concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.

Guideline Reference:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F1 (Composite of 3 sub areas within the Western Arm, Central Arm and Northern Arm of Colorado Lagoon - f).

Temporal Representation:

Data for this line of evidence were collected between 2017-07-11 and 2020-02-18. When composited fish were collected over multiple days, the first day of fish collection was used as the sample date in the LOE, both for LOE writing, and for averaging period purposes.

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138889, Chlordane	Region 4
Colorado Lagoon

LOE ID:

244679

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 6 samples exceeded the water quality threshold for Chlordane. Data were collected for 6 fish species (1 composite(s) of Top Smelt each composed of 27 fish per composite, 1 composite(s) of Top Smelt each composed of 48 fish per composite, 1 composite(s) of Top Smelt each composed of 13 fish per composite, 1 composite(s) of Top Smelt each composed of 26 fish per composite, 1 composite(s) of Top Smelt each composed of 37 fish per composite, 1 composite(s) of Top Smelt each composed of 20 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F2 (Marine Stadium of Alamitos Bay adjacent to the outfall from Colorado Lagoon - fish).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138889, Chlordane	Region 4
Colorado Lagoon

LOE ID:

244733

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 4 of the 6 samples exceeded the water quality threshold for Chlordane. Data were collected for 6 fish species (1 composite(s) of Top Smelt each composed of 13 fish per composite, 1 composite(s) of Top Smelt each composed of 20 fish per composite, 1 composite(s) of Top Smelt each composed of 37 fish per composite, 1 composite(s) of Top Smelt each composed of 27 fish per composite, 1 composite(s) of Top Smelt each composed of 26 fish per composite, 1 composite(s) of Top Smelt each composed of 48 fish per composite). Of these, 1 species (Top Smelt) exceeded the water quality threshold.

Data Reference:

Field, Tissue, Toxicity, WQ data 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 modified OEHHA Fish Contaminant Goal for total chlordane in fish tissue is 3.9 ppb. This screening level assumes an average body weight of 70 kg and a consumption rate of 32 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. A cooking reduction factor of 1 is applied for skin-off fillets. (Klasing, S., and R. Brodberg, 2008)

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F2 (Marine Stadium of Alamitos Bay adjacent to the outfall from Colorado Lagoon - fish).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138889, Chlordane	Region 4
Colorado Lagoon

LOE ID:

244653

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 3 of the 6 samples exceeded the water quality threshold for Chlordane. Data were collected for 6 fish species (1 composite(s) of Top Smelt each composed of 32 fish per composite, 1 composite(s) of Top Smelt each composed of 28 fish per composite, 1 composite(s) of Top Smelt each composed of 35 fish per composite, 1 composite(s) of Top Smelt each composed of 25 fish per composite, 1 composite(s) of Top Smelt each composed of 39 fish per composite, 1 composite(s) of Top Smelt each composed of 26 fish per composite). Of these, 1 species (Top Smelt) exceeded the water quality threshold.

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F1 (Composite of 3 sub areas within the Western Arm, Central Arm and Northern Arm of Colorado Lagoon - f).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138889, Chlordane	Region 4
Colorado Lagoon

LOE ID:

252960

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon 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 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:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The chlordane criterion for the protection of human health from consumption of organisms only is 0.00059 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 138889, Chlordane	Region 4
Colorado Lagoon

LOE ID:

252962

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The chlordane criterion for the protection of human health from consumption of organisms only is 0.00059 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 138889, Chlordane	Region 4
Colorado Lagoon

LOE ID:

252963

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The chlordane criterion for the protection of human health from consumption of organisms only is 0.00059 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

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

Line of Evidence (LOE) for Decision ID 138889, Chlordane	Region 4
Colorado Lagoon

LOE ID:

267426

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The chlordane criterion for the protection of human health from consumption of organisms only is 0.00059 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138889, Chlordane	Region 4
Colorado Lagoon

LOE ID:

267527

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Tissue, Toxicity, WQ data from 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 for the protection of human health from consumption of organisms only is 0.00059 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138889, Chlordane	Region 4
Colorado Lagoon

LOE ID:

244693

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M1 (Colorado Lagoon footbridge).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches


DECISION ID	149515	Region 4
Colorado Lagoon

Pollutant:	DDT (Dichlorodiphenyltrichloroethane)
Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)(2018)
Revision Status	Revised
Sources:	A Source Unknown
TMDL Name:	Colorado Lagoon Pesticides, PAH's, PCB, Metals etc TMDL (82 & 83)
TMDL Project Code:	748
Date TMDL Approved by USEPA:	07/28/2011
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for removal on the CWA section 303(d) List under sections 2.2 and section 4.1 of the Listing Policy. Under section 4.1 of the Policy, a minimum of one line of evidence is needed to assess listing status. Six lines of evidence are available in the administrative record to assess this pollutant. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the CWA section 303(d) List. There is sufficient justification to place it in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 10 of 12 samples exceeded the guideline for DDT in fish tissue and these exceed the allowable frequency listed in Table 4.1 of the Listing Policy. 4. The Colorado Lagoon Pesticides, PAH's, PCB, Metals, Toxicity and other pollutants TMDL was approved by USEPA on 07/28/2011. 5. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 149515, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Colorado Lagoon

LOE ID:

252220

Pollutant:

DDT (Dichlorodiphenyltrichloroethane)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon 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:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The DDT(4,4') criterion for the protection of human health from consumption of organisms only is 0.00059 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-11-28 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 149515, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Colorado Lagoon

LOE ID:

252197

Pollutant:

DDT (Dichlorodiphenyltrichloroethane)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon 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 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The DDT(4,4') criterion for the protection of human health from consumption of organisms only is 0.00059 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 149515, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Colorado Lagoon

LOE ID:

252310

Pollutant:

DDT (Dichlorodiphenyltrichloroethane)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon 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 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The DDT(4,4') criterion for the protection of human health from consumption of organisms only is 0.00059 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 149515, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Colorado Lagoon

LOE ID:

4087

Pollutant:

DDT (tissue)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Not Recorded

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Unspecified

Objective/Criterion Reference:

Evaluation Guideline:

Unspecified

Guideline Reference:

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

Spatial Representation:

Unspecified

Temporal Representation:

Unspecified

Environmental Conditions:

Unspecified

QAPP Information:

Unspecified

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 149515, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Colorado Lagoon

LOE ID:

245138

Pollutant:

Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 5 of the 6 samples exceeded the water quality threshold for Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD). Data were collected for 6 fish species (1 composite(s) of Top Smelt each composed of 20 fish per composite, 1 composite(s) of Top Smelt each composed of 37 fish per composite, 1 composite(s) of Top Smelt each composed of 48 fish per composite, 1 composite(s) of Top Smelt each composed of 27 fish per composite, 1 composite(s) of Top Smelt each composed of 26 fish per composite, 1 composite(s) of Top Smelt each composed of 13 fish per composite). Of these, 1 species (Top Smelt) exceeded the water quality threshold.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The modified OEHHA Fish Contaminant Goal for total DDT in fish tissue is 15 ppb. This screening level assumes an average body weight of 70 kg and a consumption rate of 32 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. A cooking reduction factor of 1 is applied for skin-off fillets. (Klasing, S., and R. Brodberg, 2008)

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F2 (Marine Stadium of Alamitos Bay adjacent to the outfall from Colorado Lagoon - fish).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 149515, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Colorado Lagoon

LOE ID:

245139

Pollutant:

Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 5 of the 6 samples exceeded the water quality threshold for Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD). Data were collected for 6 fish species (1 composite(s) of Top Smelt each composed of 32 fish per composite, 1 composite(s) of Top Smelt each composed of 28 fish per composite, 1 composite(s) of Top Smelt each composed of 26 fish per composite, 1 composite(s) of Top Smelt each composed of 25 fish per composite, 1 composite(s) of Top Smelt each composed of 39 fish per composite, 1 composite(s) of Top Smelt each composed of 35 fish per composite). Of these, 1 species (Top Smelt) exceeded the water quality threshold.

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F1 (Composite of 3 sub areas within the Western Arm, Central Arm and Northern Arm of Colorado Lagoon - f).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 149515, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Colorado Lagoon

LOE ID:

245200

Pollutant:

Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 6 samples exceeded the water quality threshold for Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD). Data were collected for 6 fish species (1 composite(s) of Top Smelt each composed of 39 fish per composite, 1 composite(s) of Top Smelt each composed of 32 fish per composite, 1 composite(s) of Top Smelt each composed of 26 fish per composite, 1 composite(s) of Top Smelt each composed of 28 fish per composite, 1 composite(s) of Top Smelt each composed of 35 fish per composite, 1 composite(s) of Top Smelt each composed of 25 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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 Academy of Science guidelines (NAS 1972) establish a maximum total DDT concentration of 1000 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.

Guideline Reference:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F1 (Composite of 3 sub areas within the Western Arm, Central Arm and Northern Arm of Colorado Lagoon - f).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 149515, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Colorado Lagoon

LOE ID:

245146

Pollutant:

Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 6 samples exceeded the water quality threshold for Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD). Data were collected for 6 fish species (1 composite(s) of Top Smelt each composed of 13 fish per composite, 1 composite(s) of Top Smelt each composed of 37 fish per composite, 1 composite(s) of Top Smelt each composed of 27 fish per composite, 1 composite(s) of Top Smelt each composed of 20 fish per composite, 1 composite(s) of Top Smelt each composed of 48 fish per composite, 1 composite(s) of Top Smelt each composed of 26 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F2 (Marine Stadium of Alamitos Bay adjacent to the outfall from Colorado Lagoon - fish).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 149515, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Colorado Lagoon

LOE ID:

245187

Pollutant:

Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 2 samples exceeded the water quality threshold for Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD). Data were collected for 2 fish species (1 composite(s) of Mytilus each composed of 47 fish per composite, 1 composite(s) of M. galloprovincialis each composed of 51 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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 modified OEHHA Fish Contaminant Goal for total DDT in shellfish tissue is 23 ppb. This screening level assumes an average body weight of 70 kg and a consumption rate of 21 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. (Brodberg, R.K., and G.A. Pollock, 1999; Klasing, S., and R. Brodberg, 2008)

Guideline Reference:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M1 (Colorado Lagoon footbridge).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 149515, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Colorado Lagoon

LOE ID:

245186

Pollutant:

Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 2 samples exceeded the water quality threshold for Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD). Data were collected for 2 fish species (1 composite(s) of Mytilus each composed of 47 fish per composite, 1 composite(s) of M. galloprovincialis each composed of 51 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M1 (Colorado Lagoon footbridge).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 149515, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Colorado Lagoon

LOE ID:

245204

Pollutant:

Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 2 samples exceeded the water quality threshold for Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD). Data were collected for 2 fish species (1 composite(s) of Mytilus each composed of 65 fish per composite, 1 composite(s) of M. galloprovincialis each composed of 84 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M2 (Lagoon side of the Marine Stadium culvert).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 149515, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Colorado Lagoon

LOE ID:

245157

Pollutant:

Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 2 samples exceeded the water quality threshold for Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD). Data were collected for 2 fish species (1 composite(s) of Mytilus each composed of 65 fish per composite, 1 composite(s) of M. galloprovincialis each composed of 84 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M2 (Lagoon side of the Marine Stadium culvert).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 149515, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Colorado Lagoon

LOE ID:

259916

Pollutant:

DDT (Dichlorodiphenyltrichloroethane)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon 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 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from 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 for the protection of human health from consumption of organisms only is 0.00059 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 149515, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Colorado Lagoon

LOE ID:

259955

Pollutant:

DDT (Dichlorodiphenyltrichloroethane)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon 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 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from 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 for the protection of human health from consumption of organisms only is 0.00059 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 149515, DDT (Dichlorodiphenyltrichloroethane)	Region 4
Colorado Lagoon

LOE ID:

259845

Pollutant:

DDT (Dichlorodiphenyltrichloroethane)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon 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 5 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, Tissue, Toxicity, WQ data from 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 for the protection of human health from consumption of organisms only is 0.00059 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (WS2-SW).

Temporal Representation:

Data for this waterbody was collected over the date range 2017-11-28 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches


DECISION ID	138892	Region 4
Colorado Lagoon

Pollutant:	Dieldrin
Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)(2018)
Revision Status	Revised
Sources:	A Source Unknown
TMDL Name:	Colorado Lagoon Pesticides, PAH's, PCB, Metals etc TMDL (82 & 83)
TMDL Project Code:	748
Date TMDL Approved by USEPA:	07/28/2011
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for removal on the CWA section 303(d) List under section 2.2 and sections 4.1 and 4.5 of the Listing Policy. Under these sections of the Policy, a minimum of one line of evidence is needed to assess listing status. Six lines of evidence are available in the administrative record to assess this pollutant. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the CWA section 303(d) List. There is sufficient justification to place it in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 1 of 8, 0 of 9, 0 of 4, 0 of 4 and 0 of 0 samples exceed the guidelines and 0 of 0 samples exceeded the criteria and this is insufficient to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. A minimum of 28 samples is needed to determine if a beneficial use is fully supported using table 4.1. 4. The Colorado Lagoon Pesticides, PAH's, PCB, Metals, Toxicity and other pollutants TMDL was approved by USEPA on 07/28/2011. 5. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because there was a previous listing and there are not enough data to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy.

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.

Line of Evidence (LOE) for Decision ID 138892, Dieldrin	Region 4
Colorado Lagoon

LOE ID:

260529

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon 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 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from 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 for the protection of human health from consumption of organisms only is 0.00014 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138892, Dieldrin	Region 4
Colorado Lagoon

LOE ID:

260608

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon 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 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from 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 for the protection of human health from consumption of organisms only is 0.00014 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138892, Dieldrin	Region 4
Colorado Lagoon

LOE ID:

252225

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon 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 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:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dieldrin criterion for the protection of human health from consumption of organisms only is 0.00014 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 138892, Dieldrin	Region 4
Colorado Lagoon

LOE ID:

4088

Pollutant:

Dieldrin (tissue)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Not Recorded

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Unspecified

Objective/Criterion Reference:

Evaluation Guideline:

Unspecified

Guideline Reference:

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

Spatial Representation:

Unspecified

Temporal Representation:

Unspecified

Environmental Conditions:

Unspecified

QAPP Information:

Unspecified

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 138892, Dieldrin	Region 4
Colorado Lagoon

LOE ID:

244763

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 5 samples exceeded the water quality threshold for Dieldrin. Data were collected for 5 fish species (1 composite(s) of Top Smelt each composed of 32 fish per composite, 1 composite(s) of Top Smelt each composed of 28 fish per composite, 1 composite(s) of Top Smelt each composed of 25 fish per composite, 1 composite(s) of Top Smelt each composed of 35 fish per composite, 1 composite(s) of Top Smelt each composed of 39 fish per composite).

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

National Academy of Science guidelines (NAS 1972) establish a maximum Dieldrin concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.

Guideline Reference:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F1 (Composite of 3 sub areas within the Western Arm, Central Arm and Northern Arm of Colorado Lagoon - f).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138892, Dieldrin	Region 4
Colorado Lagoon

LOE ID:

244668

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F2 (Marine Stadium of Alamitos Bay adjacent to the outfall from Colorado Lagoon - fish).

Temporal Representation:

Data for this line of evidence were collected between 2018-02-12 and 2020-02-18. When composited fish were collected over multiple days, the first day of fish collection was used as the sample date in the LOE, both for LOE writing, and for averaging period purposes.

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138892, Dieldrin	Region 4
Colorado Lagoon

LOE ID:

244670

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 2 samples exceeded the water quality threshold for Dieldrin. Data were collected for 2 fish species (1 composite(s) of Mytilus each composed of 65 fish per composite, 1 composite(s) of M. galloprovincialis each composed of 84 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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 modified OEHHA Fish Contaminant Goal for dieldrin in shellfish tissue is 0.49 ppb. This screening level assumes an average body weight of 70 kg and a consumption rate of 21 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. (Brodberg, R.K., and G.A. Pollock, 1999; Klasing, S., and R. Brodberg, 2008)

Guideline Reference:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M2 (Lagoon side of the Marine Stadium culvert).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138892, Dieldrin	Region 4
Colorado Lagoon

LOE ID:

244682

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 4 samples exceeded the water quality threshold for Dieldrin. Data were collected for 5 fish species (1 composite(s) of Top Smelt each composed of 28 fish per composite, 1 composite(s) of Top Smelt each composed of 32 fish per composite, 1 composite(s) of Top Smelt each composed of 35 fish per composite, 1 composite(s) of Top Smelt each composed of 39 fish per composite, 1 composite(s) of Top Smelt each composed of 25 fish per composite). 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 objective 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, Tissue, Toxicity, WQ data 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 modified OEHHA Fish Contaminant Goal for dieldrin in fish tissue is 0.32 ppb. This screening level assumes an average body weight of 70 kg and a consumption rate of 32 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. A cooking reduction factor of 1 is applied for skin-off fillets. (Klasing, S., and R. Brodberg, 2008)

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F1 (Composite of 3 sub areas within the Western Arm, Central Arm and Northern Arm of Colorado Lagoon - f).

Temporal Representation:

Data for this line of evidence were collected between 2017-07-11 and 2019-02-27. When composited fish were collected over multiple days, the first day of fish collection was used as the sample date in the LOE, both for LOE writing, and for averaging period purposes.

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138892, Dieldrin	Region 4
Colorado Lagoon

LOE ID:

244629

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 1 of the 4 samples exceeded the water quality threshold for Dieldrin. Data were collected for 4 fish species (1 composite(s) of Top Smelt each composed of 20 fish per composite, 1 composite(s) of Top Smelt each composed of 26 fish per composite, 1 composite(s) of Top Smelt each composed of 37 fish per composite, 1 composite(s) of Top Smelt each composed of 13 fish per composite). Of these, 1 species (Top Smelt) exceeded the water quality threshold.

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F2 (Marine Stadium of Alamitos Bay adjacent to the outfall from Colorado Lagoon - fish).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138892, Dieldrin	Region 4
Colorado Lagoon

LOE ID:

252157

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon 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 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:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dieldrin criterion for the protection of human health from consumption of organisms only is 0.00014 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 138892, Dieldrin	Region 4
Colorado Lagoon

LOE ID:

252223

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon 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 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dieldrin criterion for the protection of human health from consumption of organisms only is 0.00014 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

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

Line of Evidence (LOE) for Decision ID 138892, Dieldrin	Region 4
Colorado Lagoon

LOE ID:

244654

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 2 samples exceeded the water quality threshold for Dieldrin. Data were collected for 2 fish species (1 composite(s) of Mytilus each composed of 47 fish per composite, 1 composite(s) of M. galloprovincialis each composed of 51 fish per composite).

Data Reference:

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:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M1 (Colorado Lagoon footbridge).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138892, Dieldrin	Region 4
Colorado Lagoon

LOE ID:

260387

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon 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 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from 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 for the protection of human health from consumption of organisms only is 0.00014 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138892, Dieldrin	Region 4
Colorado Lagoon

LOE ID:

244614

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 2 samples exceeded the water quality threshold for Dieldrin. Data were collected for 2 fish species (1 composite(s) of Mytilus each composed of 65 fish per composite, 1 composite(s) of M. galloprovincialis each composed of 84 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M2 (Lagoon side of the Marine Stadium culvert).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138892, Dieldrin	Region 4
Colorado Lagoon

LOE ID:

244723

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 2 samples exceeded the water quality threshold for Dieldrin. Data were collected for 2 fish species (1 composite(s) of Mytilus each composed of 47 fish per composite, 1 composite(s) of M. galloprovincialis each composed of 51 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M1 (Colorado Lagoon footbridge).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches


DECISION ID	149512	Region 4
Colorado Lagoon

Pollutant:	PAHs (Polycyclic Aromatic Hydrocarbons)
Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)(2018)
Revision Status	Revised
Sources:	A Source Unknown
TMDL Name:	Colorado Lagoon Pesticides, PAH's, PCB, Metals etc TMDL (82 & 83)
TMDL Project Code:	748
Date TMDL Approved by USEPA:	07/28/2011
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 4.5 of the Listing Policy. Under section 4.5 a single line of evidence is necessary to assess listing status. 303(d) listing decisions made prior to 2006 were not held in an assessment database. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for removing this water segment-pollutant combination from the Being Addressed portion of the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 2 samples exceeded the guideline and this is insufficient to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by 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. 5. The Colorado Lagoon Pesticides, PAH's, PCB, Metals, Toxicity and other pollutants TMDL was approved by USEPA on 07/28/2011.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 149512, PAHs (Polycyclic Aromatic Hydrocarbons)	Region 4
Colorado Lagoon

LOE ID:

245126

Pollutant:

PAHs (Polycyclic Aromatic Hydrocarbons)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality threshold for PAHs (Polycyclic Aromatic Hydrocarbons). Data were collected for 1 fish species (1 composite(s) of Top Smelt each composed of 25 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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 modified OEHHA Fish Contaminant Goal for polycyclic aromatic hydrocarbons in fish tissue is 0.7 ppb. This screening level assumes an average body weight of 70 kg and a consumption rate of 32 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. (Klasing, S., and R. Brodberg, 2008; USEPA, 2000)

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Guideline Reference:

Guidance for Assessing Chemical Contaminant Data for Use In Fish Advisories Volume 1: Fish Sampling and Analysis

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F1 (Composite of 3 sub areas within the Western Arm, Central Arm and Northern Arm of Colorado Lagoon - f).

Temporal Representation:

Data for this line of evidence were collected between 2018-02-12 and 2018-02-12. When composited fish were collected over multiple days, the first day of fish collection was used as the sample date in the LOE, both for LOE writing, and for averaging period purposes.

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 149512, PAHs (Polycyclic Aromatic Hydrocarbons)	Region 4
Colorado Lagoon

LOE ID:

4090

Pollutant:

PAHs (Polycyclic Aromatic Hydrocarbons) (sediment)

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Not Recorded

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Unspecified

Objective/Criterion Reference:

Evaluation Guideline:

Unspecified

Guideline Reference:

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

Spatial Representation:

Unspecified

Temporal Representation:

Unspecified

Environmental Conditions:

Unspecified

QAPP Information:

Unspecified

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 149512, PAHs (Polycyclic Aromatic Hydrocarbons)	Region 4
Colorado Lagoon

LOE ID:

245133

Pollutant:

PAHs (Polycyclic Aromatic Hydrocarbons)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

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:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Guideline Reference:

Guidance for Assessing Chemical Contaminant Data for Use In Fish Advisories Volume 1: Fish Sampling and Analysis

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F2 (Marine Stadium of Alamitos Bay adjacent to the outfall from Colorado Lagoon - fish).

Temporal Representation:

Data for this line of evidence were collected between 2019-07-09 and 2019-07-09. When composited fish were collected over multiple days, the first day of fish collection was used as the sample date in the LOE, both for LOE writing, and for averaging period purposes.

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches


DECISION ID	138898	Region 4
Colorado Lagoon

Pollutant:	PCBs (Polychlorinated biphenyls)
Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)(2018)
Revision Status	Revised
Sources:	A Source Unknown
TMDL Name:	Colorado Lagoon Pesticides, PAH's, PCB, Metals etc TMDL (82 & 83)
TMDL Project Code:	748
Date TMDL Approved by USEPA:	07/28/2011
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for removal on the CWA section 303(d) List under sections 2.2 and SECTION of the Listing Policy. Under SECTION of the Policy, a minimum of one line of evidence is needed to assess listing status. NUMBER lines of evidence are available in the administrative record to assess this pollutant. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the CWA section 303(d) List. There is sufficient justification to place it in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 12 of 12, 4 of 4 and 4 of 4 samples exceeded the guidelines and these exceed the allowable frequency listed in Table 4.1 of the Listing Policy. 4. The Colorado Lagoon Pesticides, PAH's, PCB, Metals, Toxicity and other pollutants TMDL was approved by USEPA on 07/28/2011. 5. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 138898, PCBs (Polychlorinated biphenyls)	Region 4
Colorado Lagoon

LOE ID:

252905

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon 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 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:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The PCB criterion for the protection of human health from consumption of water and organisms is 0.00017 ug/L and is equal to the maximum of the sum of aroclors or congeners (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

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

Line of Evidence (LOE) for Decision ID 138898, PCBs (Polychlorinated biphenyls)	Region 4
Colorado Lagoon

LOE ID:

245163

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 2 of the 2 samples exceeded the water quality threshold for PCBs (Polychlorinated biphenyls). Data were collected for 2 fish species (1 composite(s) of Mytilus each composed of 47 fish per composite, 1 composite(s) of M. galloprovincialis each composed of 51 fish per composite). Of these, 2 species (Mytilus, M. galloprovincialis) exceeded the water quality threshold.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The modified OEHHA Fish Contaminant Goal for polychlorinated biphenyls in shellfish tissue is 3.9 ppb. This screening level assumes an average body weight of 70 kg and a consumption rate of 21 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. (Brodberg, R.K., and G.A. Pollock, 1999; Klasing, S., and R. Brodberg, 2008)

Guideline Reference:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M1 (Colorado Lagoon footbridge).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138898, PCBs (Polychlorinated biphenyls)	Region 4
Colorado Lagoon

LOE ID:

245195

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 2 of the 2 samples exceeded the water quality threshold for PCBs (Polychlorinated biphenyls). Data were collected for 2 fish species (1 composite(s) of Mytilus each composed of 65 fish per composite, 1 composite(s) of M. galloprovincialis each composed of 84 fish per composite). Of these, 2 species (Mytilus, M. galloprovincialis) exceeded the water quality threshold.

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M2 (Lagoon side of the Marine Stadium culvert).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138898, PCBs (Polychlorinated biphenyls)	Region 4
Colorado Lagoon

LOE ID:

245196

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 6 of the 6 samples exceeded the water quality threshold for PCBs (Polychlorinated biphenyls). Data were collected for 6 fish species (1 composite(s) of Top Smelt each composed of 37 fish per composite, 1 composite(s) of Top Smelt each composed of 13 fish per composite, 1 composite(s) of Top Smelt each composed of 48 fish per composite, 1 composite(s) of Top Smelt each composed of 26 fish per composite, 1 composite(s) of Top Smelt each composed of 20 fish per composite, 1 composite(s) of Top Smelt each composed of 27 fish per composite). Of these, 1 species (Top Smelt) exceeded the water quality threshold.

Data Reference:

Field, Tissue, Toxicity, WQ data 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 modified OEHHA Fish Contaminant Goal for polychlorinated biphenyls in fish tissue is 2.6 ppb. This screening level assumes an average body weight of 70 kg and a consumption rate of 32 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. A cooking reduction factor of 1 is applied for skin-off fillets. (Klasing, S., and R. Brodberg, 2008)

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F2 (Marine Stadium of Alamitos Bay adjacent to the outfall from Colorado Lagoon - fish).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138898, PCBs (Polychlorinated biphenyls)	Region 4
Colorado Lagoon

LOE ID:

245170

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 6 of the 6 samples exceeded the water quality threshold for PCBs (Polychlorinated biphenyls). Data were collected for 6 fish species (1 composite(s) of Top Smelt each composed of 35 fish per composite, 1 composite(s) of Top Smelt each composed of 26 fish per composite, 1 composite(s) of Top Smelt each composed of 25 fish per composite, 1 composite(s) of Top Smelt each composed of 39 fish per composite, 1 composite(s) of Top Smelt each composed of 32 fish per composite, 1 composite(s) of Top Smelt each composed of 28 fish per composite). Of these, 1 species (Top Smelt) exceeded the water quality threshold.

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F1 (Composite of 3 sub areas within the Western Arm, Central Arm and Northern Arm of Colorado Lagoon - f).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138898, PCBs (Polychlorinated biphenyls)	Region 4
Colorado Lagoon

LOE ID:

245094

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 2 of the 2 samples exceeded the water quality threshold for PCBs (Polychlorinated biphenyls). Data were collected for 2 fish species (1 composite(s) of Mytilus each composed of 65 fish per composite, 1 composite(s) of M. galloprovincialis each composed of 84 fish per composite). Of these, 2 species (Mytilus, M. galloprovincialis) exceeded the water quality threshold.

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M2 (Lagoon side of the Marine Stadium culvert).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138898, PCBs (Polychlorinated biphenyls)	Region 4
Colorado Lagoon

LOE ID:

245202

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M1 (Colorado Lagoon footbridge).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138898, PCBs (Polychlorinated biphenyls)	Region 4
Colorado Lagoon

LOE ID:

264423

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon 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 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data 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: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138898, PCBs (Polychlorinated biphenyls)	Region 4
Colorado Lagoon

LOE ID:

264422

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon 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 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data 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: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138898, PCBs (Polychlorinated biphenyls)	Region 4
Colorado Lagoon

LOE ID:

245176

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 6 samples exceeded the water quality threshold for PCBs (Polychlorinated biphenyls). Data were collected for 6 fish species (1 composite(s) of Top Smelt each composed of 13 fish per composite, 1 composite(s) of Top Smelt each composed of 27 fish per composite, 1 composite(s) of Top Smelt each composed of 48 fish per composite, 1 composite(s) of Top Smelt each composed of 20 fish per composite, 1 composite(s) of Top Smelt each composed of 37 fish per composite, 1 composite(s) of Top Smelt each composed of 26 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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 Academy of Science guidelines (NAS 1972) establish a maximum total PCB Arochlor concentration of 500 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.

Guideline Reference:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F2 (Marine Stadium of Alamitos Bay adjacent to the outfall from Colorado Lagoon - fish).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138898, PCBs (Polychlorinated biphenyls)	Region 4
Colorado Lagoon

LOE ID:

245203

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 6 samples exceeded the water quality threshold for PCBs (Polychlorinated biphenyls). Data were collected for 6 fish species (1 composite(s) of Top Smelt each composed of 32 fish per composite, 1 composite(s) of Top Smelt each composed of 25 fish per composite, 1 composite(s) of Top Smelt each composed of 28 fish per composite, 1 composite(s) of Top Smelt each composed of 39 fish per composite, 1 composite(s) of Top Smelt each composed of 35 fish per composite, 1 composite(s) of Top Smelt each composed of 26 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F1 (Composite of 3 sub areas within the Western Arm, Central Arm and Northern Arm of Colorado Lagoon - f).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138898, PCBs (Polychlorinated biphenyls)	Region 4
Colorado Lagoon

LOE ID:

252927

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon 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 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:

WQ data from the MS4 database 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: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 138898, PCBs (Polychlorinated biphenyls)	Region 4
Colorado Lagoon

LOE ID:

252952

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon 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 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:

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: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

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

Line of Evidence (LOE) for Decision ID 138898, PCBs (Polychlorinated biphenyls)	Region 4
Colorado Lagoon

LOE ID:

264476

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon 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 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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:

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: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138898, PCBs (Polychlorinated biphenyls)	Region 4
Colorado Lagoon

LOE ID:

264477

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon 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 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data 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: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138898, PCBs (Polychlorinated biphenyls)	Region 4
Colorado Lagoon

LOE ID:

264687

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon 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 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data 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: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138898, PCBs (Polychlorinated biphenyls)	Region 4
Colorado Lagoon

LOE ID:

252860

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon 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 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:

WQ data from the MS4 database 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: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 138898, PCBs (Polychlorinated biphenyls)	Region 4
Colorado Lagoon

LOE ID:

4091

Pollutant:

PCBs (Polychlorinated biphenyls) (tissue)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Not Recorded

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Unspecified

Objective/Criterion Reference:

Evaluation Guideline:

Unspecified

Guideline Reference:

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

Spatial Representation:

Unspecified

Temporal Representation:

Unspecified

Environmental Conditions:

Unspecified

QAPP Information:

Unspecified

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 138898, PCBs (Polychlorinated biphenyls)	Region 4
Colorado Lagoon

LOE ID:

264621

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon 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 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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:

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: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138898, PCBs (Polychlorinated biphenyls)	Region 4
Colorado Lagoon

LOE ID:

252882

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon 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 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:

WQ data from the MS4 database 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: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 138898, PCBs (Polychlorinated biphenyls)	Region 4
Colorado Lagoon

LOE ID:

252998

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon 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 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:

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: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

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


DECISION ID	138900	Region 4
Colorado Lagoon

Pollutant:	Toxicity
Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:	List on 303(d) list (being addressed by USEPA approved TMDL)(2018)
Revision Status	Revised
Sources:	A Source Unknown
TMDL Name:	Colorado Lagoon Pesticides, PAH's, PCB, Metals etc TMDL (82 & 83)
TMDL Project Code:	748
Date TMDL Approved by USEPA:	07/28/2011
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for removal on the CWA section 303(d) List under sections 2.2 and section 4.6 of the Listing Policy. Two lines of evidence are available in the administrative record to assess this pollutant. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification against removing this water segment-pollutant combination from the CWA section 303(d) List. There is sufficient justification to place it in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 0 and 0 of 18 samples exceeded the criteria and this is insufficient to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. A minimum of 28 samples is needed to determine if a beneficial use is fully supported using table 4.1. 4. The Colorado Lagoon Pesticides, PAH's, PCB, Metals, Toxicity and other pollutants TMDL was approved by USEPA on 07/28/2011. 5. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because there was a previous listing and there are not enough data to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy.

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.

Line of Evidence (LOE) for Decision ID 138900, Toxicity	Region 4
Colorado Lagoon

LOE ID:

244454

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

0 of the 6 samples collected by Colorado Lagoon TMDL Compliance Monitoring for Colorado Lagoon exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Mytilus galloprovincialis for Normal Development, Eohaustorius estuarius for Survival, Mytilus galloprovincialis for Mortality/Normality.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is “Significant; Less Similarity,” which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated.

Guideline Reference:

Short-term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms. Fourth Edition. Office of Water, U.S. Environmental Protection Agency. Washington, D.C. EPA-821-R-02-013

Spatial Representation:

The samples were collected at monitoring site: WS2-SS ( Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - sed ).

Temporal Representation:

The samples were collected between the dates of 2017-07-06 and 2020-02-06.

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138900, Toxicity	Region 4
Colorado Lagoon

LOE ID:

244441

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

0 of the 6 samples collected by Colorado Lagoon TMDL Compliance Monitoring for Colorado Lagoon exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Mytilus galloprovincialis for Mortality/Normality, Mytilus galloprovincialis for Normal Development, Eohaustorius estuarius for Survival.

Data Reference:

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

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at monitoring site: WS1-SS ( Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - sed ).

Temporal Representation:

The samples were collected between the dates of 2017-07-06 and 2020-02-06.

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138900, Toxicity	Region 4
Colorado Lagoon

LOE ID:

4092

Pollutant:

Sediment Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

Not Recorded

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Unspecified

Temporal Representation:

Unspecified

Environmental Conditions:

Unspecified

QAPP Information:

Unspecified

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 138900, Toxicity	Region 4
Colorado Lagoon

LOE ID:

244455

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Sediment

Fraction:

None

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

0 of the 6 samples collected by Colorado Lagoon TMDL Compliance Monitoring for Colorado Lagoon exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Mytilus galloprovincialis for Mortality/Normality, Eohaustorius estuarius for Survival, Mytilus galloprovincialis for Normal Development.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at monitoring site: WS3-SS ( Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - sed ).

Temporal Representation:

The samples were collected between the dates of 2017-07-06 and 2020-02-06.

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches


DECISION ID	138884	Region 4
Colorado Lagoon

Pollutant:	Anthracene
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. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 0 of 37 samples exceed the criterion 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.

Line of Evidence (LOE) for Decision ID 138884, Anthracene	Region 4
Colorado Lagoon

LOE ID:

251939

Pollutant:

Anthracene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Anthracene.

Data Reference:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The anthracene criterion for the protection of human health from consumption of organisms only is 110,000 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

The samples were collected between the dates of 2017-07-13 and 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 138884, Anthracene	Region 4
Colorado Lagoon

LOE ID:

251956

Pollutant:

Anthracene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Anthracene.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The anthracene criterion for the protection of human health from consumption of organisms only is 110,000 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

The samples were collected between the dates of 2017-07-13 and 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

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

Line of Evidence (LOE) for Decision ID 138884, Anthracene	Region 4
Colorado Lagoon

LOE ID:

257188

Pollutant:

Anthracene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and results are as follows: 0 of 8 samples exceeded the water quality threshold for Anthracene.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The anthracene criterion for the protection of human health from consumption of organisms only is 110,000 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

The samples were collected between the dates of 2017-07-13 and 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138884, Anthracene	Region 4
Colorado Lagoon

LOE ID:

257205

Pollutant:

Anthracene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

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

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The anthracene criterion for the protection of human health from consumption of organisms only is 110,000 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

The samples were collected between the dates of 2017-07-13 and 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138884, Anthracene	Region 4
Colorado Lagoon

LOE ID:

257206

Pollutant:

Anthracene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

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

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The anthracene criterion for the protection of human health from consumption of organisms only is 110,000 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

The samples were collected between the dates of 2017-07-13 and 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138884, Anthracene	Region 4
Colorado Lagoon

LOE ID:

251936

Pollutant:

Anthracene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Anthracene.

Data Reference:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The anthracene criterion for the protection of human health from consumption of organisms only is 110,000 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

The samples were collected between the dates of 2017-07-13 and 2019-07-25

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

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


DECISION ID	138886	Region 4
Colorado Lagoon

Pollutant:	Benzo(a)anthracene
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.

Line of Evidence (LOE) for Decision ID 138886, Benzo(a)anthracene	Region 4
Colorado Lagoon

LOE ID:

257617

Pollutant:

Benzo(a)anthracene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benz(a)anthracene. Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(a)anthracene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138886, Benzo(a)anthracene	Region 4
Colorado Lagoon

LOE ID:

257619

Pollutant:

Benzo(a)anthracene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benz(a)anthracene. Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(a)anthracene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138886, Benzo(a)anthracene	Region 4
Colorado Lagoon

LOE ID:

257618

Pollutant:

Benzo(a)anthracene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benz(a)anthracene. Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(a)anthracene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138886, Benzo(a)anthracene	Region 4
Colorado Lagoon

LOE ID:

251918

Pollutant:

Benzo(a)anthracene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benz(a)anthracene. 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:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(a)anthracene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2019-07-25

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 138886, Benzo(a)anthracene	Region 4
Colorado Lagoon

LOE ID:

251917

Pollutant:

Benzo(a)anthracene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benz(a)anthracene. 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(a)anthracene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 138886, Benzo(a)anthracene	Region 4
Colorado Lagoon

LOE ID:

251916

Pollutant:

Benzo(a)anthracene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benz(a)anthracene. 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(a)anthracene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.


DECISION ID	138885	Region 4
Colorado Lagoon

Pollutant:	Benzo(a)pyrene
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.

Line of Evidence (LOE) for Decision ID 138885, Benzo(a)pyrene	Region 4
Colorado Lagoon

LOE ID:

251944

Pollutant:

Benzo(a)pyrene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benzo(a)pyrene. 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(a)pyrene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 138885, Benzo(a)pyrene	Region 4
Colorado Lagoon

LOE ID:

251961

Pollutant:

Benzo(a)pyrene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benzo(a)pyrene. 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(a)pyrene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

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

Line of Evidence (LOE) for Decision ID 138885, Benzo(a)pyrene	Region 4
Colorado Lagoon

LOE ID:

257648

Pollutant:

Benzo(a)pyrene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benzo(a)pyrene. Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(a)pyrene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138885, Benzo(a)pyrene	Region 4
Colorado Lagoon

LOE ID:

257651

Pollutant:

Benzo(a)pyrene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benzo(a)pyrene. Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(a)pyrene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138885, Benzo(a)pyrene	Region 4
Colorado Lagoon

LOE ID:

257650

Pollutant:

Benzo(a)pyrene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benzo(a)pyrene. Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(a)pyrene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138885, Benzo(a)pyrene	Region 4
Colorado Lagoon

LOE ID:

251941

Pollutant:

Benzo(a)pyrene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benzo(a)pyrene. 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:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(a)pyrene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

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


DECISION ID	138887	Region 4
Colorado Lagoon

Pollutant:	Benzo[b]fluoranthene
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.

Line of Evidence (LOE) for Decision ID 138887, Benzo[b]fluoranthene	Region 4
Colorado Lagoon

LOE ID:

257667

Pollutant:

Benzo[b]fluoranthene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benzo(b)fluoranthene. Although a total of 7 samples were collected, 7 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(b)flouranthene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2019-07-25

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138887, Benzo[b]fluoranthene	Region 4
Colorado Lagoon

LOE ID:

257665

Pollutant:

Benzo[b]fluoranthene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benzo(b)fluoranthene. Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(b)flouranthene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138887, Benzo[b]fluoranthene	Region 4
Colorado Lagoon

LOE ID:

257652

Pollutant:

Benzo[b]fluoranthene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benzo(b)fluoranthene. Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(b)flouranthene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138887, Benzo[b]fluoranthene	Region 4
Colorado Lagoon

LOE ID:

251985

Pollutant:

Benzo[b]fluoranthene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benzo(b)fluoranthene. 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:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(b)flouranthene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 138887, Benzo[b]fluoranthene	Region 4
Colorado Lagoon

LOE ID:

251983

Pollutant:

Benzo[b]fluoranthene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benzo(b)fluoranthene. 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(b)flouranthene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 138887, Benzo[b]fluoranthene	Region 4
Colorado Lagoon

LOE ID:

251984

Pollutant:

Benzo[b]fluoranthene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benzo(b)fluoranthene. 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(b)flouranthene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

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


DECISION ID	138888	Region 4
Colorado Lagoon

Pollutant:	Benzo[k]fluoranthene
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.

Line of Evidence (LOE) for Decision ID 138888, Benzo[k]fluoranthene	Region 4
Colorado Lagoon

LOE ID:

257684

Pollutant:

Benzo[k]fluoranthene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benzo(k)fluoranthene. Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(k)fluoranthene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138888, Benzo[k]fluoranthene	Region 4
Colorado Lagoon

LOE ID:

257685

Pollutant:

Benzo[k]fluoranthene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benzo(k)fluoranthene. Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(k)fluoranthene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138888, Benzo[k]fluoranthene	Region 4
Colorado Lagoon

LOE ID:

257681

Pollutant:

Benzo[k]fluoranthene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benzo(k)fluoranthene. Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(k)fluoranthene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138888, Benzo[k]fluoranthene	Region 4
Colorado Lagoon

LOE ID:

252007

Pollutant:

Benzo[k]fluoranthene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benzo(k)fluoranthene. 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:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(k)fluoranthene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 138888, Benzo[k]fluoranthene	Region 4
Colorado Lagoon

LOE ID:

252004

Pollutant:

Benzo[k]fluoranthene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benzo(k)fluoranthene. 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(k)fluoranthene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 138888, Benzo[k]fluoranthene	Region 4
Colorado Lagoon

LOE ID:

251986

Pollutant:

Benzo[k]fluoranthene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Benzo(k)fluoranthene. 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The benzo(k)fluoranthene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.


DECISION ID	138890	Region 4
Colorado Lagoon

Pollutant:	Chrysene (C1-C4)
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.

Line of Evidence (LOE) for Decision ID 138890, Chrysene (C1-C4)	Region 4
Colorado Lagoon

LOE ID:

251952

Pollutant:

Chrysene (C1-C4)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Chrysene. 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The chrysene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 138890, Chrysene (C1-C4)	Region 4
Colorado Lagoon

LOE ID:

251953

Pollutant:

Chrysene (C1-C4)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Chrysene. 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The chrysene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 138890, Chrysene (C1-C4)	Region 4
Colorado Lagoon

LOE ID:

251954

Pollutant:

Chrysene (C1-C4)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Chrysene. 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The chrysene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

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

Line of Evidence (LOE) for Decision ID 138890, Chrysene (C1-C4)	Region 4
Colorado Lagoon

LOE ID:

258837

Pollutant:

Chrysene (C1-C4)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Chrysene. Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The chrysene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138890, Chrysene (C1-C4)	Region 4
Colorado Lagoon

LOE ID:

258838

Pollutant:

Chrysene (C1-C4)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Chrysene. Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The chrysene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138890, Chrysene (C1-C4)	Region 4
Colorado Lagoon

LOE ID:

258839

Pollutant:

Chrysene (C1-C4)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Chrysene. Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The chrysene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches


DECISION ID	149513	Region 4
Colorado Lagoon

Pollutant:	DDD (Dichlorodiphenyldichloroethane)
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.

Line of Evidence (LOE) for Decision ID 149513, DDD (Dichlorodiphenyldichloroethane)	Region 4
Colorado Lagoon

LOE ID:

259656

Pollutant:

DDD (Dichlorodiphenyldichloroethane)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDD(p,p'). Although a total of 7 samples were collected, 7 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The 4,4'-DDD criterion for the protection of human health from consumption of organisms only is 0.00084 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 149513, DDD (Dichlorodiphenyldichloroethane)	Region 4
Colorado Lagoon

LOE ID:

259725

Pollutant:

DDD (Dichlorodiphenyldichloroethane)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDD(p,p'). Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The 4,4'-DDD criterion for the protection of human health from consumption of organisms only is 0.00084 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 149513, DDD (Dichlorodiphenyldichloroethane)	Region 4
Colorado Lagoon

LOE ID:

252102

Pollutant:

DDD (Dichlorodiphenyldichloroethane)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDD(p,p'). 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:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The 4,4'-DDD criterion for the protection of human health from consumption of organisms only is 0.00084 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 149513, DDD (Dichlorodiphenyldichloroethane)	Region 4
Colorado Lagoon

LOE ID:

252100

Pollutant:

DDD (Dichlorodiphenyldichloroethane)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDD(p,p'). 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The 4,4'-DDD criterion for the protection of human health from consumption of organisms only is 0.00084 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

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

Line of Evidence (LOE) for Decision ID 149513, DDD (Dichlorodiphenyldichloroethane)	Region 4
Colorado Lagoon

LOE ID:

259672

Pollutant:

DDD (Dichlorodiphenyldichloroethane)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDD(p,p'). Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The 4,4'-DDD criterion for the protection of human health from consumption of organisms only is 0.00084 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 149513, DDD (Dichlorodiphenyldichloroethane)	Region 4
Colorado Lagoon

LOE ID:

252080

Pollutant:

DDD (Dichlorodiphenyldichloroethane)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDD(p,p'). 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:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The 4,4'-DDD criterion for the protection of human health from consumption of organisms only is 0.00084 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

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


DECISION ID	149514	Region 4
Colorado Lagoon

Pollutant:	DDE (Dichlorodiphenyldichloroethylene)
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.

Line of Evidence (LOE) for Decision ID 149514, DDE (Dichlorodiphenyldichloroethylene)	Region 4
Colorado Lagoon

LOE ID:

259710

Pollutant:

DDE (Dichlorodiphenyldichloroethylene)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDE(p,p'). Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The 4,4'-DDE [DDE(p,p')] criterion to protect human health from the consumption of organisms only is 0.00059 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 149514, DDE (Dichlorodiphenyldichloroethylene)	Region 4
Colorado Lagoon

LOE ID:

252174

Pollutant:

DDE (Dichlorodiphenyldichloroethylene)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDE(p,p'). 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:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The 4,4'-DDE [DDE(p,p')] criterion to protect human health from the consumption of organisms only is 0.00059 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

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

Line of Evidence (LOE) for Decision ID 149514, DDE (Dichlorodiphenyldichloroethylene)	Region 4
Colorado Lagoon

LOE ID:

259677

Pollutant:

DDE (Dichlorodiphenyldichloroethylene)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDE(p,p'). Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The 4,4'-DDE [DDE(p,p')] criterion to protect human health from the consumption of organisms only is 0.00059 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 149514, DDE (Dichlorodiphenyldichloroethylene)	Region 4
Colorado Lagoon

LOE ID:

259894

Pollutant:

DDE (Dichlorodiphenyldichloroethylene)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDE(p,p'). Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The 4,4'-DDE [DDE(p,p')] criterion to protect human health from the consumption of organisms only is 0.00059 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 149514, DDE (Dichlorodiphenyldichloroethylene)	Region 4
Colorado Lagoon

LOE ID:

252152

Pollutant:

DDE (Dichlorodiphenyldichloroethylene)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDE(p,p'). 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:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The 4,4'-DDE [DDE(p,p')] criterion to protect human health from the consumption of organisms only is 0.00059 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 149514, DDE (Dichlorodiphenyldichloroethylene)	Region 4
Colorado Lagoon

LOE ID:

252153

Pollutant:

DDE (Dichlorodiphenyldichloroethylene)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDE(p,p'). 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The 4,4'-DDE [DDE(p,p')] criterion to protect human health from the consumption of organisms only is 0.00059 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.


DECISION ID	138891	Region 4
Colorado Lagoon

Pollutant:	Dibenz[a,h]anthracene
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.

Line of Evidence (LOE) for Decision ID 138891, Dibenz[a,h]anthracene	Region 4
Colorado Lagoon

LOE ID:

252358

Pollutant:

Dibenz[a,h]anthracene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Dibenz(a,h)anthracene. 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dibenzo(a, h)anthracene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 138891, Dibenz[a,h]anthracene	Region 4
Colorado Lagoon

LOE ID:

252357

Pollutant:

Dibenz[a,h]anthracene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Dibenz(a,h)anthracene. 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dibenzo(a, h)anthracene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

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

Line of Evidence (LOE) for Decision ID 138891, Dibenz[a,h]anthracene	Region 4
Colorado Lagoon

LOE ID:

260092

Pollutant:

Dibenz[a,h]anthracene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Dibenz(a,h)anthracene. Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dibenzo(a, h)anthracene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138891, Dibenz[a,h]anthracene	Region 4
Colorado Lagoon

LOE ID:

260093

Pollutant:

Dibenz[a,h]anthracene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Dibenz(a,h)anthracene. Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dibenzo(a, h)anthracene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138891, Dibenz[a,h]anthracene	Region 4
Colorado Lagoon

LOE ID:

260076

Pollutant:

Dibenz[a,h]anthracene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Dibenz(a,h)anthracene. Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dibenzo(a, h)anthracene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138891, Dibenz[a,h]anthracene	Region 4
Colorado Lagoon

LOE ID:

252380

Pollutant:

Dibenz[a,h]anthracene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Dibenz(a,h)anthracene. 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:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dibenzo(a, h)anthracene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.


DECISION ID	138893	Region 4
Colorado Lagoon

Pollutant:	Fluorene
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. 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 36 samples exceeded the criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 138893, Fluorene	Region 4
Colorado Lagoon

LOE ID:

252069

Pollutant:

Fluorene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Fluorene.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The fluorene criterion for the protection of human health from consumption of organisms only is 14,000 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

The samples were collected between the dates of 2017-07-13 and 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

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

Line of Evidence (LOE) for Decision ID 138893, Fluorene	Region 4
Colorado Lagoon

LOE ID:

261632

Pollutant:

Fluorene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The fluorene criterion for the protection of human health from consumption of organisms only is 14,000 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

The samples were collected between the dates of 2017-07-13 and 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138893, Fluorene	Region 4
Colorado Lagoon

LOE ID:

261635

Pollutant:

Fluorene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

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

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The fluorene criterion for the protection of human health from consumption of organisms only is 14,000 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

The samples were collected between the dates of 2017-07-13 and 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138893, Fluorene	Region 4
Colorado Lagoon

LOE ID:

261634

Pollutant:

Fluorene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

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

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The fluorene criterion for the protection of human health from consumption of organisms only is 14,000 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

The samples were collected between the dates of 2017-07-13 and 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138893, Fluorene	Region 4
Colorado Lagoon

LOE ID:

252043

Pollutant:

Fluorene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Fluorene.

Data Reference:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The fluorene criterion for the protection of human health from consumption of organisms only is 14,000 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

The samples were collected between the dates of 2017-07-13 and 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 138893, Fluorene	Region 4
Colorado Lagoon

LOE ID:

252042

Pollutant:

Fluorene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Fluorene.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The fluorene criterion for the protection of human health from consumption of organisms only is 14,000 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

The samples were collected between the dates of 2017-07-13 and 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.


DECISION ID	138894	Region 4
Colorado Lagoon

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.

Line of Evidence (LOE) for Decision ID 138894, Heptachlor	Region 4
Colorado Lagoon

LOE ID:

252186

Pollutant:

Heptachlor

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon 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 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor criterion to protect human health from the consumption of organisms only is 0.00021 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

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

Line of Evidence (LOE) for Decision ID 138894, Heptachlor	Region 4
Colorado Lagoon

LOE ID:

244676

Pollutant:

Heptachlor

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 5 samples exceeded the water quality threshold for Heptachlor. Data were collected for 5 fish species (1 composite(s) of Top Smelt each composed of 35 fish per composite, 1 composite(s) of Top Smelt each composed of 32 fish per composite, 1 composite(s) of Top Smelt each composed of 25 fish per composite, 1 composite(s) of Top Smelt each composed of 39 fish per composite, 1 composite(s) of Top Smelt each composed of 28 fish per composite).

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

National Academy of Science guidelines (NAS 1972) establish a maximum Heptachlor concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.

Guideline Reference:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F1 (Composite of 3 sub areas within the Western Arm, Central Arm and Northern Arm of Colorado Lagoon - f).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138894, Heptachlor	Region 4
Colorado Lagoon

LOE ID:

244677

Pollutant:

Heptachlor

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 5 samples exceeded the water quality threshold for Heptachlor. Data were collected for 5 fish species (1 composite(s) of Top Smelt each composed of 13 fish per composite, 1 composite(s) of Top Smelt each composed of 26 fish per composite, 1 composite(s) of Top Smelt each composed of 20 fish per composite, 1 composite(s) of Top Smelt each composed of 48 fish per composite, 1 composite(s) of Top Smelt each composed of 37 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F2 (Marine Stadium of Alamitos Bay adjacent to the outfall from Colorado Lagoon - fish).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138894, Heptachlor	Region 4
Colorado Lagoon

LOE ID:

252187

Pollutant:

Heptachlor

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon 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 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:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor criterion to protect human health from the consumption of organisms only is 0.00021 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

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

Line of Evidence (LOE) for Decision ID 138894, Heptachlor	Region 4
Colorado Lagoon

LOE ID:

262094

Pollutant:

Heptachlor

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon 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 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor criterion to protect human health from the consumption of organisms only is 0.00021 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138894, Heptachlor	Region 4
Colorado Lagoon

LOE ID:

262036

Pollutant:

Heptachlor

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon 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 7 samples were collected, 7 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from 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 to protect human health from the consumption of organisms only is 0.00021 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138894, Heptachlor	Region 4
Colorado Lagoon

LOE ID:

252229

Pollutant:

Heptachlor

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon 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 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:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor criterion to protect human health from the consumption of organisms only is 0.00021 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

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

Line of Evidence (LOE) for Decision ID 138894, Heptachlor	Region 4
Colorado Lagoon

LOE ID:

262226

Pollutant:

Heptachlor

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon 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 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor criterion to protect human health from the consumption of organisms only is 0.00021 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches


DECISION ID	138895	Region 4
Colorado Lagoon

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.

Line of Evidence (LOE) for Decision ID 138895, Heptachlor epoxide	Region 4
Colorado Lagoon

LOE ID:

252273

Pollutant:

Heptachlor epoxide

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon 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 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:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor epoxide criterion for the protection of human health from consumption of organisms only is 0.00011 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

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

Line of Evidence (LOE) for Decision ID 138895, Heptachlor epoxide	Region 4
Colorado Lagoon

LOE ID:

244744

Pollutant:

Heptachlor epoxide

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 5 samples exceeded the water quality threshold for Heptachlor Epoxide. Data were collected for 5 fish species (1 composite(s) of Top Smelt each composed of 26 fish per composite, 1 composite(s) of Top Smelt each composed of 13 fish per composite, 1 composite(s) of Top Smelt each composed of 48 fish per composite, 1 composite(s) of Top Smelt each composed of 20 fish per composite, 1 composite(s) of Top Smelt each composed of 37 fish per composite).

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

The modified OEHHA Fish Contaminant Goal for heptachlor epoxide in fish tissue is 0.93 ppb. This screening level assumes an average body weight of 70 kg and a consumption rate of 32 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. A cooking reduction factor of 1 is applied for skin-off fillets. (Klasing, S., and R. Brodberg, 2008; OEHHA, 1999)

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Guideline Reference:

Public Health Goal for Heptachlor and Heptachlor Epoxide in Drinking Water

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F2 (Marine Stadium of Alamitos Bay adjacent to the outfall from Colorado Lagoon - fish).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138895, Heptachlor epoxide	Region 4
Colorado Lagoon

LOE ID:

244731

Pollutant:

Heptachlor epoxide

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 5 samples exceeded the water quality threshold for Heptachlor Epoxide. Data were collected for 5 fish species (1 composite(s) of Top Smelt each composed of 28 fish per composite, 1 composite(s) of Top Smelt each composed of 35 fish per composite, 1 composite(s) of Top Smelt each composed of 39 fish per composite, 1 composite(s) of Top Smelt each composed of 32 fish per composite, 1 composite(s) of Top Smelt each composed of 25 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Guideline Reference:

Public Health Goal for Heptachlor and Heptachlor Epoxide in Drinking Water

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F1 (Composite of 3 sub areas within the Western Arm, Central Arm and Northern Arm of Colorado Lagoon - f).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138895, Heptachlor epoxide	Region 4
Colorado Lagoon

LOE ID:

244801

Pollutant:

Heptachlor epoxide

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 2 samples exceeded the water quality threshold for Heptachlor Epoxide. Data were collected for 2 fish species (1 composite(s) of Mytilus each composed of 65 fish per composite, 1 composite(s) of M. galloprovincialis each composed of 84 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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 modified OEHHA Fish Contaminant Goal for heptachlor epoxide in shellfish tissue is 1.4 ppb. This screening level assumes an average body weight of 70 kg and a consumption rate of 21 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. (Brodberg, R.K., and G.A. Pollock, 1999; Klasing, S., and R. Brodberg, 2008; OEHHA, 1999)

Guideline Reference:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Guideline Reference:

Public Health Goal for Heptachlor and Heptachlor Epoxide in Drinking Water

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M2 (Lagoon side of the Marine Stadium culvert).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138895, Heptachlor epoxide	Region 4
Colorado Lagoon

LOE ID:

244743

Pollutant:

Heptachlor epoxide

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 2 samples exceeded the water quality threshold for Heptachlor Epoxide. Data were collected for 2 fish species (1 composite(s) of Mytilus each composed of 47 fish per composite, 1 composite(s) of M. galloprovincialis each composed of 51 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Guideline Reference:

Public Health Goal for Heptachlor and Heptachlor Epoxide in Drinking Water

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M1 (Colorado Lagoon footbridge).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138895, Heptachlor epoxide	Region 4
Colorado Lagoon

LOE ID:

244824

Pollutant:

Heptachlor epoxide

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 2 samples exceeded the water quality threshold for Heptachlor Epoxide. Data were collected for 2 fish species (1 composite(s) of Mytilus each composed of 65 fish per composite, 1 composite(s) of M. galloprovincialis each composed of 84 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Guideline Reference:

Public Health Goal for Heptachlor and Heptachlor Epoxide in Drinking Water

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M2 (Lagoon side of the Marine Stadium culvert).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138895, Heptachlor epoxide	Region 4
Colorado Lagoon

LOE ID:

244823

Pollutant:

Heptachlor epoxide

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 2 samples exceeded the water quality threshold for Heptachlor Epoxide. Data were collected for 2 fish species (1 composite(s) of Mytilus each composed of 47 fish per composite, 1 composite(s) of M. galloprovincialis each composed of 51 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Guideline Reference:

Public Health Goal for Heptachlor and Heptachlor Epoxide in Drinking Water

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M1 (Colorado Lagoon footbridge).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138895, Heptachlor epoxide	Region 4
Colorado Lagoon

LOE ID:

244600

Pollutant:

Heptachlor epoxide

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 5 samples exceeded the water quality threshold for Heptachlor Epoxide. Data were collected for 5 fish species (1 composite(s) of Top Smelt each composed of 26 fish per composite, 1 composite(s) of Top Smelt each composed of 37 fish per composite, 1 composite(s) of Top Smelt each composed of 20 fish per composite, 1 composite(s) of Top Smelt each composed of 13 fish per composite, 1 composite(s) of Top Smelt each composed of 48 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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 Academy of Science guidelines (NAS 1972) establish a maximum Heptachlor Epoxide concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.

Guideline Reference:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F2 (Marine Stadium of Alamitos Bay adjacent to the outfall from Colorado Lagoon - fish).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138895, Heptachlor epoxide	Region 4
Colorado Lagoon

LOE ID:

244584

Pollutant:

Heptachlor epoxide

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 5 samples exceeded the water quality threshold for Heptachlor Epoxide. Data were collected for 5 fish species (1 composite(s) of Top Smelt each composed of 35 fish per composite, 1 composite(s) of Top Smelt each composed of 28 fish per composite, 1 composite(s) of Top Smelt each composed of 39 fish per composite, 1 composite(s) of Top Smelt each composed of 25 fish per composite, 1 composite(s) of Top Smelt each composed of 32 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F1 (Composite of 3 sub areas within the Western Arm, Central Arm and Northern Arm of Colorado Lagoon - f).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138895, Heptachlor epoxide	Region 4
Colorado Lagoon

LOE ID:

262252

Pollutant:

Heptachlor epoxide

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon 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 7 samples were collected, 7 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from 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 for the protection of human health from consumption of organisms only is 0.00011 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138895, Heptachlor epoxide	Region 4
Colorado Lagoon

LOE ID:

262511

Pollutant:

Heptachlor epoxide

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon 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 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from 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 for the protection of human health from consumption of organisms only is 0.00011 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138895, Heptachlor epoxide	Region 4
Colorado Lagoon

LOE ID:

262421

Pollutant:

Heptachlor epoxide

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon 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 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from 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 for the protection of human health from consumption of organisms only is 0.00011 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138895, Heptachlor epoxide	Region 4
Colorado Lagoon

LOE ID:

252299

Pollutant:

Heptachlor epoxide

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon 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 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:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor epoxide criterion for the protection of human health from consumption of organisms only is 0.00011 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 138895, Heptachlor epoxide	Region 4
Colorado Lagoon

LOE ID:

252275

Pollutant:

Heptachlor epoxide

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon 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 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The heptachlor epoxide criterion for the protection of human health from consumption of organisms only is 0.00011 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.


DECISION ID	138896	Region 4
Colorado Lagoon

Pollutant:	Indeno[1,2,3-cd]pyrene
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.

Line of Evidence (LOE) for Decision ID 138896, Indeno[1,2,3-cd]pyrene	Region 4
Colorado Lagoon

LOE ID:

252322

Pollutant:

Indeno[1,2,3-cd]pyrene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Indeno(1,2,3-c,d)pyrene. 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The indeno(1, 2, 3-c,d)pyrene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

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

Line of Evidence (LOE) for Decision ID 138896, Indeno[1,2,3-cd]pyrene	Region 4
Colorado Lagoon

LOE ID:

262371

Pollutant:

Indeno[1,2,3-cd]pyrene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Indeno(1,2,3-c,d)pyrene. Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The indeno(1, 2, 3-c,d)pyrene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138896, Indeno[1,2,3-cd]pyrene	Region 4
Colorado Lagoon

LOE ID:

262369

Pollutant:

Indeno[1,2,3-cd]pyrene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Indeno(1,2,3-c,d)pyrene. Although a total of 8 samples were collected, 8 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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, Tissue, Toxicity, WQ data from the California Environmental Data Exchange Network assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The indeno(1, 2, 3-c,d)pyrene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138896, Indeno[1,2,3-cd]pyrene	Region 4
Colorado Lagoon

LOE ID:

252324

Pollutant:

Indeno[1,2,3-cd]pyrene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Indeno(1,2,3-c,d)pyrene. 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:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The indeno(1, 2, 3-c,d)pyrene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 138896, Indeno[1,2,3-cd]pyrene	Region 4
Colorado Lagoon

LOE ID:

252345

Pollutant:

Indeno[1,2,3-cd]pyrene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Indeno(1,2,3-c,d)pyrene. 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The indeno(1, 2, 3-c,d)pyrene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

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

Line of Evidence (LOE) for Decision ID 138896, Indeno[1,2,3-cd]pyrene	Region 4
Colorado Lagoon

LOE ID:

262368

Pollutant:

Indeno[1,2,3-cd]pyrene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Indeno(1,2,3-c,d)pyrene. Although a total of 7 samples were collected, 7 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the water quality 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:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The indeno(1, 2, 3-c,d)pyrene criterion for the protection of human health from consumption of organisms only is 0.049 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

Data for this waterbody were collected over the date range 2017-07-13 to 2019-07-25

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches


DECISION ID	138897	Region 4
Colorado Lagoon

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 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.

Line of Evidence (LOE) for Decision ID 138897, Lindane/gamma Hexachlorocyclohexane (gamma-HCH)	Region 4
Colorado Lagoon

LOE ID:

244728

Pollutant:

Lindane/gamma Hexachlorocyclohexane (gamma-HCH)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 5 samples exceeded the water quality threshold for HCH, gamma-. Data were collected for 5 fish species (1 composite(s) of Top Smelt each composed of 39 fish per composite, 1 composite(s) of Top Smelt each composed of 32 fish per composite, 1 composite(s) of Top Smelt each composed of 28 fish per composite, 1 composite(s) of Top Smelt each composed of 35 fish per composite, 1 composite(s) of Top Smelt each composed of 25 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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 Academy of Science guidelines (NAS 1972) establish a maximum Lindane concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.

Guideline Reference:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F1 (Composite of 3 sub areas within the Western Arm, Central Arm and Northern Arm of Colorado Lagoon - f).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138897, Lindane/gamma Hexachlorocyclohexane (gamma-HCH)	Region 4
Colorado Lagoon

LOE ID:

244755

Pollutant:

Lindane/gamma Hexachlorocyclohexane (gamma-HCH)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 5 samples exceeded the water quality threshold for HCH, gamma-. Data were collected for 5 fish species (1 composite(s) of Top Smelt each composed of 26 fish per composite, 1 composite(s) of Top Smelt each composed of 37 fish per composite, 1 composite(s) of Top Smelt each composed of 48 fish per composite, 1 composite(s) of Top Smelt each composed of 13 fish per composite, 1 composite(s) of Top Smelt each composed of 20 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F2 (Marine Stadium of Alamitos Bay adjacent to the outfall from Colorado Lagoon - fish).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138897, Lindane/gamma Hexachlorocyclohexane (gamma-HCH)	Region 4
Colorado Lagoon

LOE ID:

262007

Pollutant:

Lindane/gamma Hexachlorocyclohexane (gamma-HCH)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for HCH, gamma-.

Data Reference:

Field, Tissue, Toxicity, WQ data from 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, gamma-HCH) criterion for the protection of human health from the consumption of organisms only is 0.063 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

The samples were collected between the dates of 2019-07-25 and 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138897, Lindane/gamma Hexachlorocyclohexane (gamma-HCH)	Region 4
Colorado Lagoon

LOE ID:

244608

Pollutant:

Lindane/gamma Hexachlorocyclohexane (gamma-HCH)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality threshold for HCH, gamma-. Data were collected for 1 fish species (1 composite(s) of Mytilus each composed of 65 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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 modified OEHHA Fish Contaminant Goal for lindane in shellfish tissue is 7.1 ppb. This screening level assumes an average body weight of 70 kg and a consumption rate of 21 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. (Brodberg, R.K., and G.A. Pollock, 1999; Klasing, S., and R. Brodberg, 2008; OEHHA, 2005)

Guideline Reference:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Guideline Reference:

Air Toxics Hotspots Program Risk Assessment Guidelines. Part ll Technical Support Document for Describing Available Cancer Potency Values.

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M2 (Lagoon side of the Marine Stadium culvert).

Temporal Representation:

Data for this line of evidence were collected between 2018-07-27 and 2018-07-27. When composited fish were collected over multiple days, the first day of fish collection was used as the sample date in the LOE, both for LOE writing, and for averaging period purposes.

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138897, Lindane/gamma Hexachlorocyclohexane (gamma-HCH)	Region 4
Colorado Lagoon

LOE ID:

244580

Pollutant:

Lindane/gamma Hexachlorocyclohexane (gamma-HCH)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Shellfish Harvesting

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 2 samples exceeded the water quality threshold for HCH, gamma-. Data were collected for 2 fish species (1 composite(s) of Mytilus each composed of 47 fish per composite, 1 composite(s) of M. galloprovincialis each composed of 51 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Guideline Reference:

Air Toxics Hotspots Program Risk Assessment Guidelines. Part ll Technical Support Document for Describing Available Cancer Potency Values.

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M1 (Colorado Lagoon footbridge).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138897, Lindane/gamma Hexachlorocyclohexane (gamma-HCH)	Region 4
Colorado Lagoon

LOE ID:

244595

Pollutant:

Lindane/gamma Hexachlorocyclohexane (gamma-HCH)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 5 samples exceeded the water quality threshold for HCH, gamma-. Data were collected for 5 fish species (1 composite(s) of Top Smelt each composed of 20 fish per composite, 1 composite(s) of Top Smelt each composed of 13 fish per composite, 1 composite(s) of Top Smelt each composed of 26 fish per composite, 1 composite(s) of Top Smelt each composed of 48 fish per composite, 1 composite(s) of Top Smelt each composed of 37 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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 modified OEHHA Fish Contaminant Goal for lindane in fish tissue is 4.6 ppb. This screening level assumes an average body weight of 70 kg and a consumption rate of 32 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. A cooking reduction factor of 1 is applied for skin-off fillets. (Klasing, S., and R. Brodberg, 2008; OEHHA, 2005)

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Guideline Reference:

Air Toxics Hotspots Program Risk Assessment Guidelines. Part ll Technical Support Document for Describing Available Cancer Potency Values.

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F2 (Marine Stadium of Alamitos Bay adjacent to the outfall from Colorado Lagoon - fish).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138897, Lindane/gamma Hexachlorocyclohexane (gamma-HCH)	Region 4
Colorado Lagoon

LOE ID:

244739

Pollutant:

Lindane/gamma Hexachlorocyclohexane (gamma-HCH)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 5 samples exceeded the water quality threshold for HCH, gamma-. Data were collected for 5 fish species (1 composite(s) of Top Smelt each composed of 39 fish per composite, 1 composite(s) of Top Smelt each composed of 35 fish per composite, 1 composite(s) of Top Smelt each composed of 25 fish per composite, 1 composite(s) of Top Smelt each composed of 32 fish per composite, 1 composite(s) of Top Smelt each composed of 28 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Guideline Reference:

Air Toxics Hotspots Program Risk Assessment Guidelines. Part ll Technical Support Document for Describing Available Cancer Potency Values.

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): F1 (Composite of 3 sub areas within the Western Arm, Central Arm and Northern Arm of Colorado Lagoon - f).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138897, Lindane/gamma Hexachlorocyclohexane (gamma-HCH)	Region 4
Colorado Lagoon

LOE ID:

244767

Pollutant:

Lindane/gamma Hexachlorocyclohexane (gamma-HCH)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 2 samples exceeded the water quality threshold for HCH, gamma-. Data were collected for 2 fish species (1 composite(s) of Mytilus each composed of 47 fish per composite, 1 composite(s) of M. galloprovincialis each composed of 51 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Guideline Reference:

Air Toxics Hotspots Program Risk Assessment Guidelines. Part ll Technical Support Document for Describing Available Cancer Potency Values.

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M1 (Colorado Lagoon footbridge).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138897, Lindane/gamma Hexachlorocyclohexane (gamma-HCH)	Region 4
Colorado Lagoon

LOE ID:

244741

Pollutant:

Lindane/gamma Hexachlorocyclohexane (gamma-HCH)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Shellfish

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality threshold for HCH, gamma-. Data were collected for 1 fish species (1 composite(s) of Mytilus each composed of 65 fish per composite).

Data Reference:

Field, Tissue, Toxicity, WQ data 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:

Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Guideline Reference:

Air Toxics Hotspots Program Risk Assessment Guidelines. Part ll Technical Support Document for Describing Available Cancer Potency Values.

Spatial Representation:

Data were collected from 1 station(s). Station Code(s): M2 (Lagoon side of the Marine Stadium culvert).

Temporal Representation:

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138897, Lindane/gamma Hexachlorocyclohexane (gamma-HCH)	Region 4
Colorado Lagoon

LOE ID:

262032

Pollutant:

Lindane/gamma Hexachlorocyclohexane (gamma-HCH)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Colorado Lagoon TMDL Compliance Monitoring data for Colorado Lagoon to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for HCH, gamma-.

Data Reference:

Field, Tissue, Toxicity, WQ data from 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, gamma-HCH) criterion for the protection of human health from the consumption of organisms only is 0.063 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

The samples were collected between the dates of 2020-02-04 and 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138897, Lindane/gamma Hexachlorocyclohexane (gamma-HCH)	Region 4
Colorado Lagoon

LOE ID:

261947

Pollutant:

Lindane/gamma Hexachlorocyclohexane (gamma-HCH)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Tissue, Toxicity, WQ data from 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, gamma-HCH) criterion for the protection of human health from the consumption of organisms only is 0.063 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

The samples were collected between the dates of 2019-07-25 and 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches


DECISION ID	138899	Region 4
Colorado Lagoon

Pollutant:	Pyrene
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. 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 37 samples exceeded the criterion 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.

Line of Evidence (LOE) for Decision ID 138899, Pyrene	Region 4
Colorado Lagoon

LOE ID:

252799

Pollutant:

Pyrene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Pyrene.

Data Reference:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The pyrene criterion for the protection of human health from consumption of organisms only is 11,000 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

The samples were collected between the dates of 2017-07-13 and 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

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

Line of Evidence (LOE) for Decision ID 138899, Pyrene	Region 4
Colorado Lagoon

LOE ID:

265536

Pollutant:

Pyrene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The pyrene criterion for the protection of human health from consumption of organisms only is 11,000 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

The samples were collected between the dates of 2017-07-13 and 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138899, Pyrene	Region 4
Colorado Lagoon

LOE ID:

265550

Pollutant:

Pyrene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

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

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The pyrene criterion for the protection of human health from consumption of organisms only is 11,000 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

The samples were collected between the dates of 2017-07-13 and 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138899, Pyrene	Region 4
Colorado Lagoon

LOE ID:

265552

Pollutant:

Pyrene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

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

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The pyrene criterion for the protection of human health from consumption of organisms only is 11,000 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS1-SW (Western Arm of Colorado Lagoon adjacent to outfall of sub-basin A - water).

Temporal Representation:

The samples were collected between the dates of 2017-07-13 and 2020-02-04

Environmental Conditions:

QAPP Information:

Kinnetic Laboratories, Inc.. 2016. City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches.

QAPP Information Reference(s):

City of Long Beach Integrated Monitoring Program Lower Long Beach Bays Estuaries and Coastal San Pedro Bay Beaches

Line of Evidence (LOE) for Decision ID 138899, Pyrene	Region 4
Colorado Lagoon

LOE ID:

252802

Pollutant:

Pyrene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Pyrene.

Data Reference:

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The pyrene criterion for the protection of human health from consumption of organisms only is 11,000 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS2-SW (Northern Arm of Colorado Lagoon adjacent to outfall of sub-basin B - water).

Temporal Representation:

The samples were collected between the dates of 2017-07-13 and 2019-07-25

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

WQ data from the MS4 database assembled for the 2024 Integrated Report in Region 4.

Line of Evidence (LOE) for Decision ID 138899, Pyrene	Region 4
Colorado Lagoon

LOE ID:

252797

Pollutant:

Pyrene

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed LA County MS4 data for Colorado Lagoon to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality threshold for Pyrene.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The pyrene criterion for the protection of human health from consumption of organisms only is 11,000 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: WS3-SW (Central Arm of Colorado Lagoon adjacent to outfall of sub-basin C - water).

Temporal Representation:

The samples were collected between the dates of 2017-07-13 and 2018-05-03

Environmental Conditions:

QAPP Information:

Municipal Separate Storm Sewer System (MS4)

QAPP Information Reference(s):

The City of Long Beach Health Department Bacteria Monitoring Data for Colorado Lagoon.


DECISION ID	78682	Region 4
Colorado Lagoon

Pollutant:	Indicator Bacteria
Final Listing Decision:	Do Not Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not Delist from 303(d) list (TMDL required list)(2016)
Revision Status	Original
Sources:	A Source Unknown
Expected TMDL Completion Date:	2019
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for removal from the CWA section 303(d) List under section 4.3 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status. 10 lines of evidence are available in the administrative record to assess this pollutant. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the 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. 98 of 218, 55 of 231, 49 of 218, 44 of 231, 170 of 170, 37 of 71, 31 of 70, 24 of 71 and 128 of 218 samples exceeded the OBJECTIVE and this exceeds the allowable frequency listed in Table 4.2 of the Listing Policy. 4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 78682, Indicator Bacteria	Region 4
Colorado Lagoon

LOE ID:

27752

Pollutant:

Indicator Bacteria

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

Other Agencies/Organizations provided monitoring data

Data Used to Assess Water Quality:

24 out of 71 samples exceeded the Basin Plan geometric mean water quality objectives for indicator bacteria in marine water and 64 out 324 of samples exceeded the Basin Plan single sample water quality objectives. Water quality samples were taken and analyzed for indicator bacteria consistent with California Code of Regulations Title 17, sections 7958-7961 and related guidance issued by California Department of Public Health .

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Basin Plan bacteria objectives state that to protect water contact recreation in marine waters individual samples shall not exceed the following limits: the total coliform density shall not exceed 10000/100 ml; the fecal coliform density shall not exceed 400/100 ml; the enterococcus density shall not exceed 104/100 ml; and the total coliform density shall not exceed 1,000/100 ml, if the ratio of fecal-to-total coliform exceeds 0.1 as single samples. The bacteria objectives also establish that the geometric means of individual samples shall not exceed the following limits: the total coliform density shall not exceed 1000/100 ml, the fecal coliform density shall not exceed 200/100 ml, and the enterococcus density shall not exceed 35/100 ml, as a geometric mean. The bacteria objectives are found in Attachment A of Regional Board Resolution No. 2001-018.

Objective/Criterion Reference:

Water Quality Control Plan Los Angeles Region R4 Basin Plan

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The City of Long Beach conducted sampling in Colorado Lagoon at sampling location B-26 located in the center of the lagoon.

Temporal Representation:

Grab samples were taken and analyzed on a weekly basis from April 2001 to February 2007.

Environmental Conditions:

QAPP Information:

Data was collected in compliance with the sampling and testing procedures detailed in the California Department of Public Health related guidance.

QAPP Information Reference(s):

California Code of Regulations Title 17, sections 7958-7960.

QAPP Information Reference(s):

Draft Guidance for Salt Water Beaches. Last Update: April 10, 2006. Initial Draft: November 1997. Division of Drinking Water and Environmental Management, California Department of Health Services

Line of Evidence (LOE) for Decision ID 78682, Indicator Bacteria	Region 4
Colorado Lagoon

LOE ID:

27736

Pollutant:

Indicator Bacteria

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

Other Agencies/Organizations provided monitoring data

Data Used to Assess Water Quality:

31 out of 70 samples exceeded the Basin Plan geometric mean water quality objectives for indicator bacteria in marine water and 72 out 325 of samples exceeded the Basin Plan single sample water quality objectives. Water quality samples were taken and analyzed for indicator bacteria consistent with California Code of Regulations Title 17, sections 7958-7961 and related guidance issued by California Department of Public Health .

Data Reference:

The City of Long Beach Health Department Bacteria Monitoring Data for Colorado Lagoon.

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 City of Long Beach conducted sampling in Colorado Lagoon at sampling location B-24 located in the south end of the lagoon.

Temporal Representation:

Grab samples were taken and analyzed on a weekly basis from April 2001 to January 2007.

Environmental Conditions:

QAPP Information:

Data was collected in compliance with the sampling and testing procedures detailed in the California Department of Public Health related guidance.

QAPP Information Reference(s):

Draft Guidance for Salt Water Beaches. Last Update: April 10, 2006. Initial Draft: November 1997. Division of Drinking Water and Environmental Management, California Department of Health Services

QAPP Information Reference(s):

California Code of Regulations Title 17, sections 7958-7960.

Line of Evidence (LOE) for Decision ID 78682, Indicator Bacteria	Region 4
Colorado Lagoon

LOE ID:

27749

Pollutant:

Indicator Bacteria

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

Other Agencies/Organizations provided monitoring data

Data Used to Assess Water Quality:

37 out of 71 samples exceeded the Basin Plan geometric mean water quality objectives for indicator bacteria in marine water and 87 out 337 of samples exceeded the Basin Plan single sample water quality objectives. Water quality samples were taken and analyzed for indicator bacteria consistent with California Code of Regulations Title 17, sections 7958-7961 and related guidance issued by California Department of Public Health .

Data Reference:

The City of Long Beach Health Department Bacteria Monitoring Data for Colorado Lagoon.

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 City of Long Beach conducted sampling in Colorado Lagoon at sampling location B-25 located in the north end of the lagoon.

Temporal Representation:

Grab samples were taken and analyzed on a weekly basis from April 2001 to February 2007.

Environmental Conditions:

QAPP Information:

Data was collected in compliance with the sampling and testing procedures detailed in the California Department of Public Health related guidance.

QAPP Information Reference(s):

Draft Guidance for Salt Water Beaches. Last Update: April 10, 2006. Initial Draft: November 1997. Division of Drinking Water and Environmental Management, California Department of Health Services

QAPP Information Reference(s):

California Code of Regulations Title 17, sections 7958-7960.

Line of Evidence (LOE) for Decision ID 78682, Indicator Bacteria	Region 4
Colorado Lagoon

LOE ID:

3426

Pollutant:

Indicator Bacteria

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Water Contact Recreation

Number of Samples:

170

Number of Exceedances:

170

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Available data indicate sufficient exceedances of bacterial indicator objectives. There were 170 exceedances of the geomean for total coliform, 42 exceedances of the geomean for fecal coliform, and 52 exceedances of the geomean for enterococci (USEPA, 2007).

Data Reference:

Placeholder reference 2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Title 17 C.C.R. Section 7958 states that based on a single sample, the density of bacteria in water from each sampling station at a public beach or public water contact sports area shall not exceed:
(A) 1,000 total coliform bacteria per 100 milliliters, if the ratio of fecal/total coliform bacteria exceeds 0.1; or
(B) 10,000 total coliform bacteria per 100 milliliters; or
(C) 400 fecal coliform bacteria per 100 milliliters; or
(D) 104 enterococcus bacteria per 100 milliliters.

Based on the mean of the logarithms of the results of at least five weekly samples during any 30-day sampling period, the density of bacteria in water from any sampling station at a public beach or public water contact sports area, shall not exceed:
(A) 1,000 total coliform bacteria per 100 milliliters; or
(B) 200 fecal coliform bacteria per 100 milliliters; or
(C) 35 enterococcus bacteria per 100 milliliters (DHS, 1999).

Objective/Criterion Reference:

Placeholder reference 2006 303(d)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Three segments of the lagoon: south (Station ID# B24) north (Station ID# B25), center (Station ID# B26).

Temporal Representation:

04/02/2007-10/31/2005

Environmental Conditions:

QAPP Information:

Data record: 2001-2005, Los Angeles County Health Dept.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 78682, Indicator Bacteria	Region 4
Colorado Lagoon

LOE ID:

83846

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

231

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed BeachWatch data for Colorado Lagoon to determine beneficial use support and results are as follows: 37 of 231 samples exceed the criterion for Coliform, Total.

Data Reference:

California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (2009) single sample maximum states that total coliform density shall not exceed 10,000 per 100 mL

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Colorado Lagoon was collected at 2 monitoring sites [ Colorado Lagoon-Center, Colorado Lagoon-North]

Temporal Representation:

Data was collected over the time period 3/6/2007-8/30/2010.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

The samples were collected for the Beach Watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 78682, Indicator Bacteria	Region 4
Colorado Lagoon

LOE ID:

83845

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

218

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Forty-nine of the 218 geomeans exceeded the objective.

Data Reference:

California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The geometric mean standard for fecal coliform states that the coliform density shall not exceed 1000 per 100 mL. Water Quality Control Plan for Ocean Waters 2009.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from Colorado Lagoon-Center, Colorado Lagoon-North, and Colorado Lagoon-South. These sites are located within 200 meters and reults collected on the same day were averaged.

Temporal Representation:

Samples were collected approximately once a week from 2007 to 2010.

Environmental Conditions:

QAPP Information:

The samples were collected for the Beach Watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 78682, Indicator Bacteria	Region 4
Colorado Lagoon

LOE ID:

83842

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

231

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed BeachWatch data for Colorado Lagoon to determine beneficial use support and results are as follows: 55 of 231 samples exceed the criterion for Enterococci.

Data Reference:

California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2009) single sample maximum states that enterococcus density shall not exceed 104 per 100 mL.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Colorado Lagoon was collected at 1 monitoring site [ Colorado Lagoon-North]

Temporal Representation:

Data was collected over the time period 3/6/2007-8/30/2010.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

The samples were collected for the Beach Watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 78682, Indicator Bacteria	Region 4
Colorado Lagoon

LOE ID:

83843

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

218

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Ninety-eight of the 218 geomeans exceeded the objective.

Data Reference:

California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The geometric mean standard for entercoccus states that the enterococcus density shall not exceed 1000 per 100 mL. Water Quality Control Plan for Ocean Waters 2009.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from Colorado Lagoon-Center, Colorado Lagoon-North, and Colorado Lagoon-South. These sites are located within 200 meters and reults collected on the same day were averaged.

Temporal Representation:

Samples were collected approximately once a week from 2007 to 2010.

Environmental Conditions:

QAPP Information:

The samples were collected for the Beach Watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 78682, Indicator Bacteria	Region 4
Colorado Lagoon

LOE ID:

83847

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

218

Number of Exceedances:

128

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

One hundred twenty-eight of the 218 geomeans exceeded the objective.

Data Reference:

California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The geometric mean standard for total coliform states that the coliform density shall not exceed 1000 per 100 mL. Water Quality Control Plan for Ocean Waters 2009.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from Colorado Lagoon-Center, Colorado Lagoon-North, and Colorado Lagoon-South. These sites are located within 200 meters and reults collected on the same day were averaged.

Temporal Representation:

Samples were collected approximately once a week from 2007 to 2010.

Environmental Conditions:

QAPP Information:

The samples were collected for the Beach Watch program.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 78682, Indicator Bacteria	Region 4
Colorado Lagoon

LOE ID:

83844

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

231

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed BeachWatch data for Colorado Lagoon to determine beneficial use support and results are as follows: 44 of 231 samples exceed the criterion for Coliform, Fecal.

Data Reference:

California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2009) single sample maximum states that fecal coliform density shall not exceed 400 per 100ml

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Colorado Lagoon was collected at 1 monitoring site [ Colorado Lagoon-Center]

Temporal Representation:

Data was collected over the time period 3/6/2007-8/30/2010.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

The samples were collected for the Beach Watch program.

QAPP Information Reference(s):


DECISION ID	98804	Region 4
Colorado Lagoon

Pollutant:	Lead
Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)(2016)
Revision Status	Original
Sources:	A Source Unknown
TMDL Name:	Colorado Lagoon Pesticides, PAH's, PCB, Metals etc TMDL (82 & 83)
TMDL Project Code:	748
Date TMDL Approved by USEPA:	07/28/2011
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	303(d) listing decisions made prior to 2006 were not held in an assessment database. There is sufficient justification to place this waterbody/pollutant in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by USEPA, and is expected to result in attainment of the standard. This conclusion is based on the staff findings that: 1. The Colorado Lagoon Pesticides, PAH's, PCB, Metals, Toxicity and other pollutants TMDL was approved by USEPA on 07/28/2011. 2. 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 removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 98804, Lead	Region 4
Colorado Lagoon

LOE ID:

4089

Pollutant:

Lead (sediment)

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Not Recorded

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Unspecified

Objective/Criterion Reference:

Evaluation Guideline:

Unspecified

Guideline Reference:

Spatial Representation:

Unspecified

Temporal Representation:

Unspecified

Environmental Conditions:

Unspecified

QAPP Information:

Unspecified

QAPP Information Reference(s):


DECISION ID	70915	Region 4
Colorado Lagoon

Pollutant:	Zinc
Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)(2016)
Revision Status	Original
Sources:	A Source Unknown
TMDL Name:	Colorado Lagoon Pesticides, PAH's, PCB, Metals etc TMDL (82 & 83)
TMDL Project Code:	748
Date TMDL Approved by USEPA:	07/28/2011
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	303(d) listing decisions made prior to 2006 were not held in an assessment database. There is sufficient justification to place this waterbody/pollutant in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by USEPA, and is expected to result in attainment of the standard. This conclusion is based on the staff findings that: 1. The Colorado Lagoon Pesticides, PAH's, PCB, Metals, Toxicity and other pollutants TMDL was approved by USEPA on 07/28/2011. 2. 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 removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 70915, Zinc	Region 4
Colorado Lagoon

LOE ID:

4093

Pollutant:

Zinc (sediment)

LOE Subgroup:

Pollutant-Sediment

Matrix:

Sediment

Fraction:

Not Recorded

Beneficial Use:

Estuarine Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Unspecified

Objective/Criterion Reference:

Evaluation Guideline:

Unspecified

Guideline Reference: