| Water Body Name: | Dominguez Channel (lined portion above Vermont Ave) |
| Water Body ID: | CAR4051200019980918161017 |
| Water Body Type: | River & Stream |
Lines of Evidence (LOEs) for Decision ID 7180 |
| LOE ID: | 4099 |
| 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: | 0 |
| Number of Exceedances: | 0 |
| Data and Information Type: | Not Specified |
| Data Used to Assess Water Quality: | Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006. |
| Data Reference: | Placeholder reference pre-2006 303(d) |
| Water Quality Objective/Criterion: | Unspecified |
| Objective/Criterion Reference: | Placeholder reference pre-2006 303(d) |
| Evaluation Guideline: | Unspecified |
| Guideline Reference: | Placeholder reference pre-2006 303(d) |
| Spatial Representation: | Unspecified |
| Temporal Representation: | Unspecified |
| Environmental Conditions: | Unspecified |
| QAPP Information: | Unspecified |
| QAPP Information Reference(s): | |
Lines of Evidence (LOEs) for Decision ID 6851 |
| LOE ID: | 2315 |
| Pollutant: | Sediment Toxicity |
| LOE Subgroup: | Toxicity |
| Matrix: | Sediment |
| Fraction: | None |
| Beneficial Use: | Warm Freshwater Habitat |
| Number of Samples: | 27 |
| Number of Exceedances: | 19 |
| Data and Information Type: | Toxicity testing of sediments |
| Data Used to Assess Water Quality: | There were 27 sediment samples available and 19 of these show sediment toxicity (Heal the Bay, 2006). |
| Data Reference: | Placeholder reference 2006 303(d) |
| Water Quality Objective/Criterion: | From the Los Angeles RWQCB's Basin Plan: All waters should 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. Compliance with this objective will be determined by the use of indicator organisms, analyses of species diversity, population densities, growth anomalies, bioassays of appropriate duration or other appropriate methods as specified by the State or Regional Board. |
| Objective/Criterion Reference: | Placeholder reference 2006 303(d) |
| Evaluation Guideline: | |
| Guideline Reference: | |
| Spatial Representation: | Six sites throughout the Dominguez Channel were sampled: (R1) Anaheim Street, (R3) Alameda Street, (R4) Sepulveda Boulevard, (R5) 223rd Street/Willimington Avenue, (R6) Avalon Boulevard, and (R7) Main Street. |
| Temporal Representation: | Samples were taken between August 2000 and April 2004. |
| Environmental Conditions: | |
| QAPP Information: | Data collected for NPDES Permit No. CA003778 (Shell Oil Products US, Los Angeles Refinery). |
| QAPP Information Reference(s): | |
Lines of Evidence (LOEs) for Decision ID 5194 |
| LOE ID: | 2288 |
| Pollutant: | Copper |
| LOE Subgroup: | Pollutant-Water |
| Matrix: | Water |
| Fraction: | Dissolved |
| Beneficial Use: | Warm Freshwater Habitat |
| Number of Samples: | 6 |
| Number of Exceedances: | 4 |
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
| Data Used to Assess Water Quality: | Four out of 6 samples exceeded both the CCC and CMC (LACDWP, 2003a). |
| Data Reference: | Placeholder reference 2006 303(d) |
| Water Quality Objective/Criterion: | CTR dissolved copper criteria for continuous concentration (CCC) and maximum concentration (CMC) in water for the protection of aquatic life are expressed as a function of the total hardness of the water body. The aquatic life criteria will vary depending of total hardness reported at the sampling site. The CCC for dissolved copper is the highest concentration to which aquatic life can be exposed for an extended period of time (e.g., four days) without deleterious effects. The CMC for dissolved copper is the highest concentration to which aquatic life can be exposed for a short period of time (e.g., one hour) without deleterious effects. These criteria are linked and applicable for the protection of aquatic life beneficial uses. |
| Objective/Criterion Reference: | Placeholder reference 2006 303(d) |
| Evaluation Guideline: | |
| Guideline Reference: | |
| Spatial Representation: | Samples were taken at the Dominguez Channel Monitoring Station (S28) which is located at Dominguez Channel and Artesia Boulevard in the City of Torrance. At this location, which was chosen to avoid tidal influence, the upstream tributary area is 33 square miles. The portion of the river where the monitoring site is located is a concrete-lined rectangular channel. |
| Temporal Representation: | Samples were taken October through December 2002, and February through April 2003. The positive quantification limit (PQL) of the sample taken on 3/15/03 was higher than the CCC criteria, however sample concentration results was even greater. |
| Environmental Conditions: | According to the County of Los Angeles, Department of Public Works, Stormwater Monitoring Reports, 2002-2003 Monitoring Report samples were taken during storm events, the amount of rainfall was not noted. |
| QAPP Information: | Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works. |
| QAPP Information Reference(s): | |
| | |
| LOE ID: | 2287 |
| Pollutant: | Copper |
| LOE Subgroup: | Pollutant-Water |
| Matrix: | Water |
| Fraction: | Dissolved |
| Beneficial Use: | Warm Freshwater Habitat |
| Number of Samples: | 12 |
| Number of Exceedances: | 12 |
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
| Data Used to Assess Water Quality: | Twelve out of 12 samples exceed both the CCC and CMC (LACDWP, 2003a). |
| Data Reference: | Placeholder reference 2006 303(d) |
| Water Quality Objective/Criterion: | CTR dissolved copper criteria for continuous concentration (CCC) and maximum concentration (CMC) in water for the protection of aquatic life are expressed as a function of the total hardness of the water body. The aquatic life criteria will vary depending of total hardness reported at the sampling site. The CCC for dissolved copper is the highest concentration to which aquatic life can be exposed for an extended period of time (e.g., four days) without deleterious effects. The CMC for dissolved copper is the highest concentration to which aquatic life can be exposed for a short period of time (e.g., one hour) without deleterious effects. These criteria are linked and applicable for the protection of aquatic life beneficial uses. Calculation of the criteria is based on ambient hardness at the time of sampling. |
| Objective/Criterion Reference: | Placeholder reference 2006 303(d) |
| Evaluation Guideline: | |
| Guideline Reference: | |
| Spatial Representation: | Samples were taken at the Dominguez Channel Monitoring Station (S23) which is located within the Dominguez Channel/Los Angeles Harbor watershed in Lennox, near Los Angeles International Airport (LAX). The monitoring station is near the intersection of 116th Street and Isis Avenue. The overall watershed land use is predominantly transportation, and includes areas of LAX and Interstate 105. |
| Temporal Representation: | Samples were taken in October 2000, and in January through April 2001. |
| Environmental Conditions: | According to the County of Los Angeles, Department of Public Works, Stormwater Monitoring Reports, 2000-2001 Monitoring Report samples were taken during storm events, the amount of rainfall was not noted. |
| QAPP Information: | Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works. |
| QAPP Information Reference(s): | |
| | |
| LOE ID: | 28197 |
| Pollutant: | Copper |
| LOE Subgroup: | Pollutant-Water |
| Matrix: | Water |
| Fraction: | Dissolved |
| Beneficial Use: | Warm Freshwater Habitat |
| Aquatic Life Use: | Preservation of Rare & Endangered Species | Wildlife Habitat |
| Number of Samples: | 31 |
| Number of Exceedances: | 19 |
| Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) |
| Data Used to Assess Water Quality: | Nineteen of 31 samples exceeded the CCC, 16 of which also exceeded the CMC. Data provided by the County of Los Angeles, Department of Public Works, Stormwater Monitoring Reports, 2001-2002, 2002-2003, 2003-2004, 2004-2005, 2005-2006, and 2006-2007. |
| Data Reference: | Summary tables for monitoring station S28, County of Los Angeles, Department of Public Works, Stormwater Monitoring Reports for 2001-2002, 2002-2003, 2003-2004, 2004-2005, 2005-2006, and 2006-2007 (MS4 Data) |
| Water Quality Objective/Criterion: | CTR dissolved copper criteria for continuous concentration (CCC) and maximum concentration (CMC) in water for the protection of aquatic life are expressed as a function of the total hardness of the water body. The aquatic life criteria will vary depending on the total hardness reported at the sampling site.
The CCC for dissolved copper is the highest concentration to which aquatic life can be exposed for an extended period of time (e.g., four days) without deleterious effects. The CMC for dissolved copper is the highest concentration to which aquatic life can be exposed for a short period of time without deleterious effects. These criteria are linked and applicable for the protection of aquatic life beneficial uses. |
| 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: | Samples were collected at the Dominguez Channel Monitoring Station (S28), which is located at Dominguez Channel and Artesia Boulevard in the City of Torrance (Lat 33.87260, Long -118.31114). At this location, which was chosen to avoid tidal influence, the upstream tributary area is 33 square miles. The portion of the river where the monitoring site is located is a concrete-lined rectangular channel. |
| Temporal Representation: | Dry and wet weather samples were collected during the months of January, February, March, April, October, November and December from 1/2002 through 4/2007 as part of the Los Angeles County Stormwater monitoring program. |
| Environmental Conditions: | |
| QAPP Information: | Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works. |
| QAPP Information Reference(s): | Monitoring and Reporting Program - CI 6948 for order no. 01-182 NPDES No. CAS004001 Municipal Storm Water and Urban Runoff Discharges within the County of Los Angeles, and the incorporated cities, except the City of Long Beach |
| | |
| LOE ID: | 2289 |
| Pollutant: | Copper |
| LOE Subgroup: | Pollutant-Water |
| Matrix: | Water |
| Fraction: | Dissolved |
| Beneficial Use: | Warm Freshwater Habitat |
| Number of Samples: | 1 |
| Number of Exceedances: | 1 |
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
| Data Used to Assess Water Quality: | The single sample taken exceeded both the CCC and CMC (LACDWP, 2003a). |
| Data Reference: | Placeholder reference 2006 303(d) |
| Water Quality Objective/Criterion: | CTR dissolved copper criteria for continuous concentration (CCC) and maximum concentration (CMC) in water for the protection of aquatic life are expressed as a function of the total hardness of the water body. The aquatic life criteria will vary depending of total hardness reported at the sampling site. The CCC for dissolved copper is the highest concentration to which aquatic life can be exposed for an extended period of time (e.g., four days) without deleterious effects. The CMC for dissolved copper is the highest concentration to which aquatic life can be exposed for a short period of time (e.g., one hour) without deleterious effects. These criteria are linked and applicable for the protection of aquatic life beneficial uses. |
| Objective/Criterion Reference: | Placeholder reference 2006 303(d) |
| Evaluation Guideline: | |
| Guideline Reference: | |
| Spatial Representation: | Samples were taken at the Dominguez Channel Monitoring Station (S28) which is located at Dominguez Channel and Artesia Boulevard in the City of Torrance. At this location, which was chosen to avoid tidal influence, the upstream tributary area is 33 square miles. The portion of the river where the monitoring site is located is a concrete-lined rectangular channel. |
| Temporal Representation: | The sample was taken in January 2002. |
| Environmental Conditions: | According to the County of Los Angeles, Department of Public Works, Stormwater Monitoring Reports, 2001-2002 Monitoring Report samples were taken during storm events, the amount of rainfall was not noted. |
| QAPP Information: | Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works. |
| QAPP Information Reference(s): | |
Lines of Evidence (LOEs) for Decision ID 5186 |
| LOE ID: | 2291 |
| Pollutant: | Lead |
| LOE Subgroup: | Pollutant-Water |
| Matrix: | Water |
| Fraction: | Dissolved |
| Beneficial Use: | Warm Freshwater Habitat |
| Number of Samples: | 0 |
| Number of Exceedances: | 0 |
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
| Data Used to Assess Water Quality: | The positive quantification limit (5 ug/L) was too high to be valid for determining compliance with the CCC in 6 out of 6 samples taken at S28 in October 2002 through April 2003. If the positive quantification limit is assumed to be equal to the concentration in the water, then, all samples would result in exceedances (LAC, 2003a). |
| Data Reference: | Placeholder reference 2006 303(d) |
| Water Quality Objective/Criterion: | CTR dissolved lead criterion for continuous concentration (CCC) in water for the protection of aquatic life is expressed as a function of the total hardness of the water body. The aquatic life criteria will vary depending of total hardness reported at the sampling site.
The CCC for dissolved lead is the highest concentration to which aquatic life can be exposed for an extended period of time (e.g., four days) without deleterious effects. These criteria are linked and applicable for the protection of aquatic life beneficial uses. Calculation of the criteria based on ambient hardness at the time of sampling resulted in CCCs ranging from 0.23 to 7.27 ug/l. |
| Objective/Criterion Reference: | Placeholder reference 2006 303(d) |
| Evaluation Guideline: | |
| Guideline Reference: | |
| Spatial Representation: | Samples were taken at the Dominguez Channel Monitoring Station (S28) which is located at Dominguez Channel and Artesia Boulevard in the City of Torrance. At this location, which was chosen to avoid tidal influence, the upstream tributary area is 33 square miles. The portion of the river where the monitoring site is located is a concrete-lined rectangular channel. |
| Temporal Representation: | Samples were taken October through December 2002, and February through April 2003. |
| Environmental Conditions: | According to the County of Los Angeles, Department of Public Works, Stormwater Monitoring Reports, 2002-2003 Monitoring Report samples were taken during storm events, the amount of rainfall was not noted. |
| QAPP Information: | Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works. |
| QAPP Information Reference(s): | |
| | |
| LOE ID: | 28202 |
| Pollutant: | Lead |
| LOE Subgroup: | Pollutant-Water |
| Matrix: | Water |
| Fraction: | Dissolved |
| Beneficial Use: | Warm Freshwater Habitat |
| Aquatic Life Use: | Preservation of Rare & Endangered Species | Wildlife Habitat |
| Number of Samples: | 31 |
| Number of Exceedances: | 23 |
| Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) |
| Data Used to Assess Water Quality: | The positive quantification limit (5 ug/L) was too high to be valid for determining compliance with the CCC in 23 out of 31 samples collected. If the positive quantification limit is assumed to be equal to the concentration in the water, then, all 23 samples would result in exceedances. Data provided by the County of Los Angeles, Department of Public Works, Stormwater Monitoring Reports, 2001-2002, 2002-2003, 2003-2004, 2004-2005, 2005-2006, and 2006-2007. |
| Data Reference: | Summary tables for monitoring station S28, County of Los Angeles, Department of Public Works, Stormwater Monitoring Reports for 2001-2002, 2002-2003, 2003-2004, 2004-2005, 2005-2006, and 2006-2007 (MS4 Data) |
| Water Quality Objective/Criterion: | CTR dissolved lead criteria for continuous concentration (CCC) and maximum concentration (CMC) in water for the protection of aquatic life are expressed as a function of the total hardness of the water body. The aquatic life criteria will vary depending on the total hardness reported at the sampling site.
The CCC for dissolved lead is the highest concentration to which aquatic life can be exposed for an extended period of time (e.g., four days) without deleterious effects. The CMC for dissolved lead is the highest concentration to which aquatic life can be exposed for a short period of time without deleterious effects. These criteria are linked and applicable for the protection of aquatic life beneficial uses. |
| 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: | Samples were collected at the Dominguez Channel Monitoring Station (S28), which is located at Dominguez Channel and Artesia Boulevard in the City of Torrance (Lat 33.87260, Long -118.31114). At this location, which was chosen to avoid tidal influence, the upstream tributary area is 33 square miles. The portion of the river where the monitoring site is located is a concrete-lined rectangular channel. |
| Temporal Representation: | Dry and wet weather samples were collected during the months of January, February, March, April, October, November and December from 1/2002 through 4/2007 as part of the Los Angeles County Stormwater monitoring program. |
| Environmental Conditions: | |
| QAPP Information: | Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works. |
| QAPP Information Reference(s): | Monitoring and Reporting Program - CI 6948 for order no. 01-182 NPDES No. CAS004001 Municipal Storm Water and Urban Runoff Discharges within the County of Los Angeles, and the incorporated cities, except the City of Long Beach |
| | |
| LOE ID: | 2290 |
| Pollutant: | Lead |
| LOE Subgroup: | Pollutant-Water |
| Matrix: | Water |
| Fraction: | Dissolved |
| Beneficial Use: | Warm Freshwater Habitat |
| Number of Samples: | 0 |
| Number of Exceedances: | 0 |
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
| Data Used to Assess Water Quality: | The detection limit (5 ug/L) was too high to be valid for determining compliance with the CCC in 11 out of 12 samples taken at S23 in October 2000, and January through April 2001. If the detection limit is assumed to be equal to the concentration in the water, then, 11 of 12 samples would result in exceedances (LAC, 2003a). |
| Data Reference: | Placeholder reference 2006 303(d) |
| Water Quality Objective/Criterion: | CTR dissolved lead criterion for continuous concentration (CCC) in water for the protection of aquatic life is expressed as a function of the total hardness of the water body. The aquatic life criteria will vary depending of total hardness reported at the sampling site.
The CCC for dissolved lead is the highest concentration to which aquatic life can be exposed for an extended period of time (e.g., four days) without deleterious effects. These criteria are linked and applicable for the protection of aquatic life beneficial uses. |
| Objective/Criterion Reference: | Placeholder reference 2006 303(d) |
| Evaluation Guideline: | |
| Guideline Reference: | |
| Spatial Representation: | Samples were taken at the Dominguez Channel Monitoring Station (S23) which is located within the Dominguez Channel/Los Angeles Harbor watershed in Lennox, near Los Angeles International Airport (LAX). The monitoring station is near the intersection of 116th Street and Isis Avenue. The overall watershed land use is predominantly transportation, and includes areas of LAX and Interstate 105. |
| Temporal Representation: | Sampling occurred in October 2000 and January through April 2001. |
| Environmental Conditions: | According to the County of Los Angeles, Department of Public Works, Stormwater Monitoring Reports, 2000-2001 Monitoring Report samples were taken during storm events, the amount of rainfall was not noted. |
| QAPP Information: | Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works. The detection limit was not sensitive enough to determine compliance with the criteria. |
| QAPP Information Reference(s): | |
Lines of Evidence (LOEs) for Decision ID 5217 |
| LOE ID: | 2296 |
| Pollutant: | Zinc |
| LOE Subgroup: | Pollutant-Water |
| Matrix: | Water |
| Fraction: | Dissolved |
| Beneficial Use: | Warm Freshwater Habitat |
| Number of Samples: | 12 |
| Number of Exceedances: | 12 |
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
| Data Used to Assess Water Quality: | Twelve out of 12 samples exceed both the CCC and CMC (LACDPW, 2003a). |
| Data Reference: | Placeholder reference 2006 303(d) |
| Water Quality Objective/Criterion: | CTR dissolved zinc criteria for continuous concentration (CCC) and maximum concentration (CMC) in water for the protection of aquatic life are expressed as a function of the total hardness of the water body. The aquatic life criteria will vary depending of total hardness reported at the sampling site.
The CCC for dissolved zinc is the highest concentration to which aquatic life can be exposed for an extended period of time (e.g., four days) without deleterious effects. The CMC for dissolved zinc is the highest concentration to which aquatic life can be exposed for a short period of time (e.g., one hour) without deleterious effects. These criteria are linked and applicable for the protection of aquatic life beneficial uses. |
| Objective/Criterion Reference: | Placeholder reference 2006 303(d) |
| Evaluation Guideline: | |
| Guideline Reference: | |
| Spatial Representation: | Samples were taken at the Dominguez Channel Monitoring Station (S23) which is located within the Dominguez Channel/Los Angeles Harbor watershed in Lennox, near Los Angeles International Airport (LAX). The monitoring station is near the intersection of 116th Street and Isis Avenue. The overall watershed land use is predominantly transportation, and includes areas of LAX and Interstate 105. |
| Temporal Representation: | Samples were taken in October 2000, and in January through April 2001. |
| Environmental Conditions: | According to the County of Los Angeles, Department of Public Works, Stormwater Monitoring Reports, 2000-2001 Monitoring Report samples were taken during storm events, the amount of rainfall was not noted. |
| QAPP Information: | Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works. |
| QAPP Information Reference(s): | |
| | |
| LOE ID: | 2297 |
| Pollutant: | Zinc |
| LOE Subgroup: | Pollutant-Water |
| Matrix: | Water |
| Fraction: | Dissolved |
| Beneficial Use: | Warm Freshwater Habitat |
| Number of Samples: | 6 |
| Number of Exceedances: | 2 |
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
| Data Used to Assess Water Quality: | Two out of 6 samples exceeded both the CCC and CMC. The positive quantification limit (PQL) of 50 ug/L was too high to determine compliance of the sample taken on 3/15/03. If the PQL is used to determine compliance, then the sample taken on 3/15/03 also exceeded the criteria (LACDPW, 2003a). |
| Data Reference: | Placeholder reference 2006 303(d) |
| Water Quality Objective/Criterion: | CTR dissolved zinc criteria for continuous concentration (CCC) and maximum concentration (CMC) in water for the protection of aquatic life are expressed as a function of the total hardness of the water body. The aquatic life criteria will vary depending of total hardness reported at the sampling site.
The CCC for dissolved zinc is the highest concentration to which aquatic life can be exposed for an extended period of time (e.g., four days) without deleterious effects. The CMC for dissolved zinc is the highest concentration to which aquatic life can be exposed for a short period of time (e.g., one hour) without deleterious effects. These criteria are linked and applicable for the protection of aquatic life beneficial uses. |
| Objective/Criterion Reference: | Placeholder reference 2006 303(d) |
| Evaluation Guideline: | |
| Guideline Reference: | |
| Spatial Representation: | Samples were taken at the Dominguez Channel Monitoring Station (S28) which is located at Dominguez Channel and Artesia Boulevard in the City of Torrance. At this location, which was chosen to avoid tidal influence, the upstream tributary area is 33 square miles. The portion of the river where the monitoring site is located is a concrete-lined rectangular channel. |
| Temporal Representation: | |
| Environmental Conditions: | According to the County of Los Angeles, Department of Public Works, Stormwater Monitoring Reports, 2002-2003 Monitoring Report samples were taken during storm events, the amount of rainfall was not noted. |
| QAPP Information: | Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works. |
| QAPP Information Reference(s): | |
| | |
| LOE ID: | 28203 |
| Pollutant: | Zinc |
| LOE Subgroup: | Pollutant-Water |
| Matrix: | Water |
| Fraction: | Dissolved |
| Beneficial Use: | Warm Freshwater Habitat |
| Aquatic Life Use: | Preservation of Rare & Endangered Species | Wildlife Habitat |
| Number of Samples: | 30 |
| Number of Exceedances: | 13 |
| Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) |
| Data Used to Assess Water Quality: | Thirteen of 30 samples exceeded both the CCC and CMC. Data provided by the County of Los Angeles, Department of Public Works, Stormwater Monitoring Reports, 2001-2002, 2002-2003, 2003-2004, 2004-2005, 2005-2006, and 2006-2007. |
| Data Reference: | Summary tables for monitoring station S28, County of Los Angeles, Department of Public Works, Stormwater Monitoring Reports for 2001-2002, 2002-2003, 2003-2004, 2004-2005, 2005-2006, and 2006-2007 (MS4 Data) |
| Water Quality Objective/Criterion: | CTR dissolved zinc criteria for continuous concentration (CCC) and maximum concentration (CMC) in water for the protection of aquatic life are expressed as a function of the total hardness of the water body. The aquatic life criteria will vary depending on the total hardness reported at the sampling site.
The CCC for dissolved zinc is the highest concentration to which aquatic life can be exposed for an extended period of time (e.g., four days) without deleterious effects. The CMC for dissolved zinc is the highest concentration to which aquatic life can be exposed for a short period of time without deleterious effects. These criteria are linked and applicable for the protection of aquatic life beneficial uses. |
| 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: | Samples were collected at the Dominguez Channel Monitoring Station (S28), which is located at Dominguez Channel and Artesia Boulevard in the City of Torrance (Lat 33.87260, Long -118.31114). At this location, which was chosen to avoid tidal influence, the upstream tributary area is 33 square miles. The portion of the river where the monitoring site is located is a concrete-lined rectangular channel. |
| Temporal Representation: | Dry and wet weather samples were collected during the months of January, February, March, April, October, November and December from 1/2002 through 4/2007 as part of the Los Angeles County Stormwater monitoring program. |
| Environmental Conditions: | |
| QAPP Information: | Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works. |
| QAPP Information Reference(s): | Monitoring and Reporting Program - CI 6948 for order no. 01-182 NPDES No. CAS004001 Municipal Storm Water and Urban Runoff Discharges within the County of Los Angeles, and the incorporated cities, except the City of Long Beach |
| | |
| LOE ID: | 2298 |
| Pollutant: | Zinc |
| LOE Subgroup: | Pollutant-Water |
| Matrix: | Water |
| Fraction: | Dissolved |
| Beneficial Use: | Warm Freshwater Habitat |
| Number of Samples: | 1 |
| Number of Exceedances: | 1 |
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
| Data Used to Assess Water Quality: | The single sample exceeded both the CCC and CMC (LACDPW, 2003a). |
| Data Reference: | Placeholder reference 2006 303(d) |
| Water Quality Objective/Criterion: | CTR dissolved zinc criteria for continuous concentration (CCC) and maximum concentration (CMC) in water for the protection of aquatic life are expressed as a function of the total hardness of the water body. The aquatic life criteria will vary depending of total hardness reported at the sampling site. The CCC for dissolved zinc is the highest concentration to which aquatic life can be exposed for an extended period of time (e.g., four days) without deleterious effects. The CMC for dissolved zinc is the highest concentration to which aquatic life can be exposed for a short period of time (e.g., one hour) without deleterious effects. These criteria are linked and applicable for the protection of aquatic life beneficial uses. |
| Objective/Criterion Reference: | Placeholder reference 2006 303(d) |
| Evaluation Guideline: | |
| Guideline Reference: | |
| Spatial Representation: | Samples were taken at the Dominguez Channel Monitoring Station (S28) which is located at Dominguez Channel and Artesia Boulevard in the City of Torrance. At this location, which was chosen to avoid tidal influence, the upstream tributary area is 33 square miles. The portion of the river where the monitoring site is located is a concrete-lined rectangular channel. |
| Temporal Representation: | The single sample was taken on 1/28/02. |
| Environmental Conditions: | According to the County of Los Angeles, Department of Public Works, Stormwater Monitoring Reports, 2001-2002 Monitoring Report samples were taken during storm events, the amount of rainfall was not noted. |
| QAPP Information: | Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works. |
| QAPP Information Reference(s): | |
Lines of Evidence (LOEs) for Decision ID 16294 |
| LOE ID: | 27974 |
| Pollutant: | Diazinon |
| LOE Subgroup: | Pollutant-Water |
| Matrix: | Water |
| Fraction: | None |
| Beneficial Use: | Warm Freshwater Habitat |
| Aquatic Life Use: | Preservation of Rare & Endangered Species | Wildlife Habitat |
| Number of Samples: | 31 |
| Number of Exceedances: | 5 |
| Data and Information Type: | Fixed station physical/chemical (conventional plus toxic pollutants) |
| Data Used to Assess Water Quality: | Five of 31 samples collected as part of the Los Angeles County Stormwater monitoring program exceeded the chronic DFG fresh water hazard assessment criteria (three of which also exceeded the acute criteria) for the protection of aquatic life. |
| Data Reference: | Monitoring Report (MS4 Data) - CI 6948 for order no. 01-182 NPDES No. CAS004001 Municipal Storm Water and Urban Runoff Discharges within the County of Los Angeles, and the Incorporated Cities therein, Except the City of Long Beach |
| Water Quality Objective/Criterion: | From the Los Angeles RWQCBs Basin Plan: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. |
| Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan |
| Basin Plan Amendments to the Water Quality Control Plan Los Angeles Region R4 Basin Plan as of 02/02/2009 | |
| Evaluation Guideline: | Numerical Diazinon guideline used to interpret Basin Plan narrative pesticide WQO: The numeric guidelines are
0.10 ug/L 4-day average (chronic) and 0.16 ug/L 1-hour average (acute) generated by DFG as a fresh water hazard assessment criteria for the protection of aquatic life (Siepmann and Finlayson, 2000; Finlayson, 2004). |
| Guideline Reference: | Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game |
| Water quality for diazinon. Memorandum to J. Karkoski, Central Valley RWQCB. Rancho Cordova, CA: Pesticide Investigation Unit, CA Department of Fish and Game | |
| Spatial Representation: | Samples were collected at the Dominguez Channel Monitoring Station (S28), which is located at Dominguez Channel and Artesia Boulevard in the City of Torrance (Lat 33.8726039252, Long -118.311137807). At this location, which was chosen to avoid tidal influence, the upstream tributary area is 33 square miles. The portion of the river where the monitoring site is located is a concrete-lined rectangular channel. |
| Temporal Representation: | Dry and wet weather samples were collected during the months of January, February, March, April, October, November and December from 1/2002 through 4/2007 as part of the Los Angeles County Stormwater monitoring program. |
| Environmental Conditions: | |
| QAPP Information: | Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works. |
| QAPP Information Reference(s): | Monitoring and Reporting Program - CI 6948 for order no. 01-182 NPDES No. CAS004001 Municipal Storm Water and Urban Runoff Discharges within the County of Los Angeles, and the incorporated cities, except the City of Long Beach |
Lines of Evidence (LOEs) for Decision ID 16354 |
| LOE ID: | 28138 |
| Pollutant: | Toxicity |
| LOE Subgroup: | Pollutant-Water |
| Matrix: | Water |
| Fraction: | None |
| Beneficial Use: | Warm Freshwater Habitat |
| Aquatic Life Use: | Preservation of Rare & Endangered Species |
| Number of Samples: | 20 |
| Number of Exceedances: | 10 |
| Data and Information Type: | TOXICITY TESTING |
| Data Used to Assess Water Quality: | 10 of 20 samples exhibited significant chronic toxicity to Sea Urchin, four of 20 samples exhibited significant acute toxicity to Ceriodaphnia dubia, and three of 21 samples exhibited significant chronic toxicity to Ceriodaphnia dubia. |
| Data Reference: | Summary of MS4 toxicity results for the years 2001-2002, 2003-2004, 2005-2006, and 2006-2007. |
| Water Quality Objective/Criterion: | The Basin Plan states that there shall be no acute or chronic toxicity in ambient waters outside mixing zones. |
| Objective/Criterion Reference: | Water Quality Control Plan Los Angeles Region R4 Basin Plan |
| Basin Plan Amendments to the Water Quality Control Plan Los Angeles Region R4 Basin Plan as of 02/02/2009 | |
| Evaluation Guideline: | Toxicity was defined as a reduction of the NOEC below 100% and was considered significant if the effect on the sample exposure was greater than 25%. Chronic toxicity is further expressed as toxic units (TUc), where TUc = 100/NOEC
The No Observable Effect Concentration (NOEC) is expressed as the maximum percent of receiving water that causes no observable effect on a test organism, as determined by the result of a critical life stage toxicity test. The NOEC is defined, in (USEPA, 2002) as the The lowest concentration of toxicant to which organisms are exposed in a life-cycle or partial life-cycle (short-term) test, which causes adverse effects on the test organisms (i.e., where the values for the observed responses are statistically significantly different from the controls). |
| Guideline Reference: | U.S. EPA, 2002. Short-term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms. Fourth Edition, October 2002. |
| FINAL Calleguas Creek Watershed Toxicity, Chlorpyrifos and Diazinon TMDL Technical Report. 2005. Submitted to Los Angeles Regional Water Quality Control Board. Prepared by Larry Walker Associates on behalf of the Calleguas Creek Watershed Management Plan. June 21, 2005. | |
| Spatial Representation: | Samples were collected at the Dominguez Channel Monitoring Station (S28), which is located at Dominguez Channel and Artesia Boulevard in the City of Torrance (Lat 33.87260, Long -118.31114). At this location, which was chosen to avoid tidal influence, the upstream tributary area is 33 square miles. The portion of the river where the monitoring site is located is a concrete-lined rectangular channel. |
| Temporal Representation: | Dry and wet weather samples were collected during the months of January, February, March, April, June, July, October, November, and December from 3/2002 through 4/2007 as part of the Los Angeles County Stormwater monitoring program. |
| Environmental Conditions: | |
| QAPP Information: | Evaluation of Analytes and QA/QC Specifications for Monitoring Program (Woodward-Clyde, 1996) Los Angeles County Department of Public Works. |
| QAPP Information Reference(s): | Monitoring and Reporting Program - CI 6948 for order no. 01-182 NPDES No. CAS004001 Municipal Storm Water and Urban Runoff Discharges within the County of Los Angeles, and the incorporated cities, except the City of Long Beach |