Draft 2008 California 303(d)/305(b) Integrated Report

Supporting Information

Regional Board 4 - Los Angeles Region

Water Body Name: Coyote Creek
Water Body ID: CAR4051501019980917123914
Water Body Type: River & Stream
 
DECISION ID
4967
 
Pollutant: Zinc
Final Listing Decision: 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)(2006)
Revision Status Revised
Reason for Delisting: State determines water quality standard is being met
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is being considered for removal from the section 303(d) list under section 4.1 of the Listing Policy. Under section 4.1 a single line of evidence is necessary to assess listing status.

Three 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 for removing this water segment-pollutant combination from the section 303(d) list.

The USEPA final decision was to not delist this water body-pollutant combination from the section 303(d) list for 2006, based on the information contained in the lines of evidence.

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. Six of 76 samples exceeded the dissolved zinc CTR criterion continuous concentration for the dissolved fraction, one of 156 samples exceeded the dissolved zinc CTR criterion continuous concentration for the total fraction, and this does not exceed the allowable frequency listed in Table 4.1 of the Listing Policy for the dissolved fraction.
4. Pursuant to section 4.11 of the Listing Policy, no additional data and
information are available indicating that standards are not met.
 
RWQCB Board Decision / Staff Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be removed from the section 303(d) list because applicable water quality standards for the pollutant are not being exceeded.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 4967
 
LOE ID: 21360
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Preservation of Rare & Endangered Species | Wildlife Habitat
 
Number of Samples: 156
Number of Exceedances: 1
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: One of 156 samples exceeded the hardness dependant California Toxics Rule Criterion Cintinous Concentration and one of 156 samples exceeded Criterion Maximum Concentration for Zinc. Water quality samples were taken and analyzed for Zinc in accordance with the Long Beach Waste Water Reclamation Plant permit monitoring and testing parameters.
Data Reference: NPDES receiving water monitoring reports for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011).
  NPDES receiving water metals data for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011).
 
Water Quality Objective/Criterion: The California Toxics Rule lists Criterion Continuous Concentrations for Zinc to protect aquatic life in freshwater. The Zinc criterion in freshwater is hardness dependant for each sample and varies based on the on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependant formula for metals criteria.
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 Sanitation Districts of Los Angeles County conducted sampling in Coyote Creek in the following receiving water monitoring stations: receiving water station RA1 located upstream of discharge from Long Beach Water Reclamation Plant and receiving water station RA located downstream of discharge from Long Beach Water Reclamation Plant.
Temporal Representation: Grab samples were taken and analyzed on a yearly basis from August 1995 to July 2001 and on a monthly basis from July 2001 to February 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County (NPDES No. CA0054119) Monitoring and Reporting Program.
QAPP Information Reference(s): Long Beach Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0054119 (County Sanitation Districts of Los Angeles County)
 
LOE ID: 21359
 
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: 14
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Zero of 14 samples exceeded the hardness dependant California Toxics Rule Criterion Maximum Concentration for Zinc. Water quality samples were taken and analyzed for Zinc in accordance with the Municipal Separate Storm Sewer System (MS4) permit monitoring and testing parameters.
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: The California Toxics Rule lists Criterion Continuous Concentrations for Zinc to protect aquatic life in freshwater. The Zinc criterion in freshwater is hardness dependant for each sample and varies based on the on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependant formula for metals criteria.
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 Los Angeles County Department of Public Works conducted sampling at the mass emmission monitoring station S13 located below Spring Street in Coyote Creek (Lat: 33.8098610175, Long: -118.077061937).
Temporal Representation: Composite samples were taken approximately six per year (four wet-weather events and two dry-weather events), from March 2005 through April 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in County of Los Angeles MS4 Permit (NPDES No. CAS004001) Monitoring and Reporting Program.
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: 2427
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 62
Number of Exceedances: 6
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Numeric data generated from 62 samples with 6 samples exceeding the CTR dissolved zinc CCC (LACDPW, 2004C. LARWQCB, 2006) (USEPA, 2007).
Data Reference: Placeholder reference 2006 303(d)
 
Water Quality Objective/Criterion: The California Toxics Rule dissolved zinc criterion 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 CCC for dissolved zinc is the highest concentration to which aquatic life can be exposed for an extended period of time (four days) without deleterious effects. This criterion is for the protection of aquatic life Beneficial Uses.
Objective/Criterion Reference: Placeholder reference 2006 303(d)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The Coyote Creek Monitoring Station (S13) is located at the existing ACOE stream gauge station (Stream Gauge No. F354-R) below Spring Street in the lower San Gabriel River watershed. The site assists in determining mass loading for the San Gabriel River watershed. At this location, the upstream tributary area is 150 square miles (extending into Orange County). The sampling site was chosen to avoid backwater effects from the San Gabriel River. Coyote Creek, at the gauging station, is a concrete lined trapezoidal channel. The Coyote Creek sampling location has been an active stream gauging station since 1963.
Temporal Representation: Samples collected from 11/10/97 to 1/7/05.
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):
 
DECISION ID
5096
 
Pollutant: Diazinon
Final Listing Decision: Do Not Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (TMDL required list)(2006)
Revision Status Revised
Sources: Source Unknown
Expected TMDL Completion Date: 2019
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is being considered for removal from the section 303(d) list under section 4.1 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status.

Three lines of evidence are available in the administrative record to assess This pollutant.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the section 303(d) list.

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. Six of 69 samples exceeded the CDFG acute Hazard Assessment Criterion and seven of 47 samples exceed the CDFG chronic criterion for Diazinon and this exceeds the allowable frequency calculated from the equation in Table 4.1 of the Listing Policy.
4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
 
RWQCB Board Decision / Staff Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 5096
 
LOE ID: 2440
 
Pollutant: Diazinon
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 22
Number of Exceedances: 2
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Numeric data generated from 22 samples taken from 10/12/00 to 4/30/03 at one to two-week sampling interval. Two samples out 22 exceeded the acute DFG fresh water hazard assessment criteria for the protection of aquatic life (LACDPW, 2004c).
Data Reference: Placeholder reference 2006 303(d)
 
Water Quality Objective/Criterion: Basin Plan narrative WQO for Pesticides.
Objective/Criterion Reference: Placeholder reference 2006 303(d)
 
Evaluation Guideline: Numerical Diazinon guideline used to interpret Basin Plan narrative pesticide WQO. The numeric guidelines are 0.10 ug/l 4-day average and 0.16 ug/l 1-hour average generated by DFG as a fresh water hazard assessment criteria for the protection of aquatic life (Siepman & Finlayson, 2000; Finlayson, 2004).
Guideline Reference: Placeholder reference 2006 303(d)
 
Spatial Representation: One sample site sampled during the dry and wet season beginning from 10/12/00 through 4/30/03 at approximately one to two week intervals.
Temporal Representation: Twenty-one samples were taken during the wet season and one sample was taken during the dry season from 10/12/00 to 4/30/03 at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions: The Coyote Creek Monitoring Station (S13) is located at the existing ACOE stream gage station (Stream Gage No. F354-R) below Spring Street in the lower San Gabriel River watershed. The site assists in determining mass loading for the San Gabriel River watershed. At this location, the upstream tributary area is 150 square miles (extending into Orange County). The sampling site was chosen to avoid backwater effects from the San Gabriel River. Coyote Creek, at the gauging station, is a concrete lined trapezoidal channel. The Coyote Creek sampling location has been an active stream gauging station since 1963.
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: 25003
 
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: 24
Number of Exceedances: 3
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Three of 24 samples exceeded the CDFG chronic Hazard Assessment Criterion for Diazinon and one of 24 samples exceeded the CDFG acute Hazard Assessment Criterion. Water quality samples were taken and analyzed for Diazinon in accordance with the Sanitation Districts of Los Angeles County permit monitoring and testing parameters.
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: The Basin Plan states, "[n]o 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: The California Department of Fish and Game (CDFG) lists an acute and chronic Hazard Assessment Criterion of 0.16 ug/L and 0.10 ug/L for diazinon.
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: The Los Angeles County Department of Public Works conducted sampling at the mass emission monitoring station S13 located below Spring Street in Coyote Creek (Lat: 33.8098610175, Long: -118.077061937).
Temporal Representation: Composite samples were taken approximately six per year, four wet-weather events and two dry-weather events, from October 2003 through April 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in County of Los Angeles MS4 Permit (NPDES No. CAS004001) Monitoring and Reporting Program.
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: 21361
 
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: 23
Number of Exceedances: 4
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Four of 23 samples exceeded the CDFG chronic Hazard Assessment Criterion and three of 23 samples exceeded the CDFG acute Hazard Assessment Criterion for Diazinon. Water quality samples were taken and analyzed for Diazinon in accordance with the Sanitation Districts of Los Angeles County permit monitoring and testing parameters.
Data Reference: NPDES receiving water monitoring reports for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011).
 
Water Quality Objective/Criterion: The Basin Plan states, "[n]o 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: The California Department of Fish and Game (CDFG) lists an acute and chronic Hazard Assessment Criterion of 0.16 ug/L and 0.10 ug/L for diazinon.
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: The Sanitation Districts of Los Angeles County conducted sampling in Coyote Creek in the following receiving water monitoring stations: receiving water station RA1 located upstream of discharge from Long Beach Water Reclamation Plant and receiving water station RA located downstream of discharge from Long Beach Water Reclamation Plant.
Temporal Representation: Grab samples taken and analyzed on a bimonthly and monthly basis from June 2004 to February 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County Permit (No. CA0054119) Monitoring and Reporting Program.
QAPP Information Reference(s): Long Beach Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0054119 (County Sanitation Districts of Los Angeles County)
 
DECISION ID
7120
 
Pollutant: Indicator Bacteria
Final Listing Decision: Do Not Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (TMDL required list)(2006)
Revision Status Revised
Sources: Source Unknown
Expected TMDL Completion Date: 2009
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is being considered for removal from the 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.

Three lines of evidence are available in the administrative record to assess this pollutant.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the section 303(d) list.

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. 220 of 339 samples exceeded the updated Basin Plan water quality objectives for indicator bacteria and this exceeds the allowable frequency calculated from the equation 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.
 
RWQCB Board Decision / Staff 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.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 7120
 
LOE ID: 25017
 
Pollutant: Indicator Bacteria
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 23
Number of Exceedances: 22
 
Data and Information Type: Other Agencies/Organizations provided monitoring data
Data Used to Assess Water Quality: 22 of 23 samples exceeded the Basin Plan single sample water quality objectives for indicator bacteria in fresh water. Five of five sample exceeded the geometric mean limit specified in the Basin Plan amendment. Water quality samples were taken and analyzed for indicator bacteria in accordance with the Municipal Separate Storm Sewer System (MS4) permit monitoring and testing parameters.
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: The Basin Plan bacteria objectives state that to protect water contact recreation in fresh waters individual samples shall not exceed the following limits: fecal coliform density shall not exceed 400/100 ml; and E. coli density shall not exceed 235/100 ml. The bacteria objectives also establish that the geometric means of individual samples shall not exceed the following limits: the fecal coliform density shall not exceed 200/100 ml; and the E. coli density shall not exceed 126/100 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
  Basin Plan Amendments to the Water Quality Control Plan Los Angeles Region R4 Basin Plan as of 02/02/2009
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The Los Angeles County Department of Public Works conducted sampling at the mass emission monitoring station S13 located below Spring Street in Coyote Creek (Lat: 33.8098610175, Long: -118.077061937).
Temporal Representation: Composite samples were taken approximately six per year, four wet-weather events and two dry-weather events, from October 2003 through April 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in County of Los Angeles MS4 Permit (NPDES No. CAS004001) Monitoring and Reporting Program.
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: 25214
 
Pollutant: Indicator Bacteria
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 269
Number of Exceedances: 198
 
Data and Information Type: Other Agencies/Organizations provided monitoring data
Data Used to Assess Water Quality: 198 of 269 samples exceeded the Basin Plan single sample water quality objectives for indicator bacteria in fresh water. 55 of 58 sample exceeded the geometric mean limit specified in the Basin Plan amendment. Water quality samples were taken and analyzed for indicator bacteria in accordance with the Sanitation Districts of Los Angeles County permit monitoring and testing parameters.
Data Reference: NPDES receiving water monitoring reports for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011).
 
Water Quality Objective/Criterion: The Basin Plan bacteria objectives state that to protect water contact recreation in fresh waters individual samples shall not exceed the following limits: fecal coliform density shall not exceed 400/100 ml; and E. coli density shall not exceed 235/100 ml. The bacteria objectives also establish that the geometric means of individual samples shall not exceed the following limits: the fecal coliform density shall not exceed 200/100 ml; and the E. coli density shall not exceed 126/100 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
  Basin Plan Amendments to the Water Quality Control Plan Los Angeles Region R4 Basin Plan as of 02/02/2009
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The Sanitation Districts of Los Angeles County conducted sampling in Coyote Creek in the following receiving water monitoring stations: receiving water station RA1 located upstream of discharge from Long Beach Water Reclamation Plant; receiving water station RA located downstream of discharge from Long Beach Water Reclamation Plant; and station R9 East located at the downstream end of the pavement lining (near Atherton Street) in the eastern low flow channel of San Gabriel River.
Temporal Representation: Grab samples were taken and analyzed on a bimonthly and monthly basis from June 2004 to February 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County Permit (No. CA0054119) Monitoring and Reporting Program.
QAPP Information Reference(s): Long Beach Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0054119 (County Sanitation Districts of Los Angeles County)
 
LOE ID: 4095
 
Pollutant: Coliform Bacteria
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
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):
 
DECISION ID
4548
 
Pollutant: pH
Final Listing Decision: Do Not Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (TMDL required list)(2006)
Revision Status Revised
Sources: Source Unknown
Expected TMDL Completion Date: 2019
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is being considered for removal from the section 303(d) list under section 4.2 of the Listing Policy. Under section 4.2 a single line of evidence is necessary to assess listing status.

Four lines of evidence are available in the administrative record to assess this pollutant.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the section 303(d) list 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. 203 of 536 samples exceeded the Basin Plan water quality objectives for pH 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.
 
RWQCB Board Decision / Staff 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.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 4548
 
LOE ID: 26260
 
Pollutant: pH
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: 16
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Zero of 16 samples exceeded the Basin Plan water quality objectives for pH in inland surface water bodies. Water quality samples were taken and analyzed for pH in accordance with the Municipal Separate Storm Sewer System (MS4) permit monitoring and testing parameters.
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: The Basin Plan states, "pH of inland surface waters shall not be depressed below 6.5 or raised above 8.5 as a result of wastes discharges."
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:
Guideline Reference:
 
Spatial Representation: The Los Angeles County Department of Public Works conducted sampling at the mass emmission monitoring station S13 located below Spring Street in Coyote Creek (Lat: 33.8098610175, Long: -118.077061937).
Temporal Representation: Composite samples were taken approximately six per year (four wet-weather events and two dry-weather events), from December 2004 through April 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in County of Los Angeles MS4 Permit (NPDES No. CAS004001) Monitoring and Reporting Program.
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: 2441
 
Pollutant: pH
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 15
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Numeric data generated from 15 samples taken from 10/12/00 to 1/28/02 at one to two-week sampling interval. One sample was below the 6.5 pH basin plan WQO for the protection of aquatic life beneficial uses (LACDPW, 2003a).
Data Reference: Placeholder reference 2006 303(d)
 
Water Quality Objective/Criterion: Basin Plan WQO for inland surface waters shall not be depressed below 6.5 or raised above 8.5 as a result of waster discharges to protect aquatic life BUs.
Objective/Criterion Reference: Placeholder reference 2006 303(d)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: One sample site sampled during the dry and wet season beginning from 10/12/00 through 1/28/02 at approximately one to two week intervals.
Temporal Representation: Fifteen samples where taken during the wet and dry season from 10/12/00 to 1/28/02 at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions: The Coyote Creek Monitoring Station (S13) is located at the existing ACOE stream gage station (Stream Gage No. F354-R) below Spring Street in the lower San Gabriel River watershed. The site assists in determining mass loading for the San Gabriel River watershed. At this location, the upstream tributary area is 150 square miles (extending into Orange County). The sampling site was chosen to avoid backwater effects from the San Gabriel River. Coyote Creek, at the gauging station, is a concrete lined trapezoidal channel. The Coyote Creek sampling location has been an active stream gauging station since 1963.
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: 2442
 
Pollutant: pH
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 229
Number of Exceedances: 97
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Ninety-seven samples out of 229 total samples exceed the pH objective.
Data Reference: Placeholder reference 2006 303(d)
 
Water Quality Objective/Criterion: Basin Plan: The pH of inland surface waters shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges. Ambient pH levels shall not be changed more than 0.5 units from natural conditions as a result of waste discharge.
Objective/Criterion Reference: Placeholder reference 2006 303(d)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Three stations.
Temporal Representation: Samples were collected weekly between June 2003 and November 2004.
Environmental Conditions:
QAPP Information: NPDES quality assurance.
QAPP Information Reference(s):
 
LOE ID: 25016
 
Pollutant: pH
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: 276
Number of Exceedances: 105
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: 105 of 276 samples exceeded the Basin Plan water quality objectives for pH in inland surface water bodies. Water quality samples were taken and analyzed for pH in accordance with the Sanitation Districts of Los Angeles County permit monitoring and testing parameters.
Data Reference: NPDES receiving water monitoring reports for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011).
 
Water Quality Objective/Criterion: The Basin Plan states, "pH of inland surface waters shall not be depressed below 6.5 or raised above 8.5 as a result of wastes discharges."
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:
Guideline Reference:
 
Spatial Representation: The Sanitation Districts of Los Angeles County conducted sampling in Coyote Creek in the following receiving water monitoring stations: receiving water station RA1 located upstream of discharge from Long Beach Water Reclamation Plant; receiving water station RA located downstream of discharge from Long Beach Water Reclamation Plant; and station R9 East located at the downstream end of the pavement lining (near Atherton Street) in the eastern low flow channel of San Gabriel River.
Temporal Representation: Grab samples taken and analyzed on a bimonthly and monthly basis from December 2004 to February 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County Permit (No. CA0054119) Monitoring and Reporting Program.
QAPP Information Reference(s): Long Beach Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0054119 (County Sanitation Districts of Los Angeles County)
 
DECISION ID
7354
 
Pollutant: Ammonia
Final Listing Decision: Do Not Delist from 303(d) list (being addressed with action other than TMDL)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (being addressed by action other than TMDL)(2006)
Revision Status Revised
Sources: Point Source
Expected Attainment Date: 2019
Date TMDL Approved by USEPA: An alternative enforceable program is in place that will address ammonia water quality standards exceedances for this Reach. The Regional Board adopted Order No. R4-2007-047 for the Long Beach Water Reclamation Plant (WRP) on September 6, 2007, which contains effluent limits, receiving water limitations, and monitoring requirements for ammonia at the Long Beach WRP. In accordance with this permit, the Los Angeles County Sanitation Districts have added nitrification and denitrification facilities at the Long Beach WRP to comply with the ammonia objectives. The Long Beach WRP is in the process of upgrading the nitrification/denitrification process at the facility to improve its reliability. The improvements were to be completed by August 2007.
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is being considered for removal from the section 303(d) list under section 4.1 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status.

Three 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 in the Water Quality Limited Segments Being Addressed portion of the 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. 21 of 94 samples exceeded the ammonia water quality objective and this exceeds the allowable frequency listed in Table 4.1 of the Listing Policy. Subsequent data obtained under Order R4-2007-047 will be used to evaluate attainment of water quality standards in this waterbody in Coyote Creek.
4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
RWQCB Board Decision / Staff 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.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 7354
 
LOE ID: 27248
 
Pollutant: Ammonia
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Freshwater Replenishment | Preservation of Rare & Endangered Species | Wildlife Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Zero of 18 samples exceeded the one-hour objective for ammonia. Water quality samples were taken and analyzed for Ammonia in accordance with the Long Beach Waste Water Reclamation Plant permit monitoring and testing parameters.
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: The Basin Plan states, "In order to protect aquatic life, ammonia concentrations in inland surface waters characteristic of freshwater shall not exceed the values calculated for the appropriate instream conditions shown in Tables 3-1 to 3-3." The one-hour average objective is dependent on pH and the presence or absence of early life stages of fish (ELS) but not temperature. The 30-day average objective is dependent on pH, temperature and ELS in Tables 3-1 to 3-3. The ammonia objectives and the pH and temperature dependent formula are found in Attachment A of Regional Board Resolution No. 2002-011.
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:
Guideline Reference:
 
Spatial Representation: The Los Angeles County Department of Public Works conducted sampling at the mass emission monitoring station S13 located below Spring Street in Coyote Creek (Lat: 33.8098610175, Long: -118.077061937).
Temporal Representation: Composite samples were taken approximately six per year (four wet-weather events and two dry-weather events), from October 2003 through April 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in County of Los Angeles MS4 Permit (NPDES No. CAS004001) Monitoring and Reporting Program.
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: 2431
 
Pollutant: Ammonia
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 10
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Based on 30-day average concentrations of ammonia, 10 samples out of 18 total samples exceed the ammonia objective. Ambient measurements of pH and temperature (30-day averages) were used to calculate the water quality objective (LACSD, 2004a).
Data Reference: Placeholder reference 2006 303(d)
 
Water Quality Objective/Criterion: In order to protect aquatic life, ammonia concentrations in inland surface waters characteristic of freshwater shall not exceed the values calculated for the appropriate instream conditions [both pH and temperature] shown in Tables 3-1 to 3-3 [in the Basin Plan] (per U.S. EPA's most recent criteria guidance document, '1999 Update of Ambient Water Quality Criteria for Ammonia').
Objective/Criterion Reference: Placeholder reference 2006 303(d)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Three stations.
Temporal Representation: Samples were collected from June 2003 through November 2004. New management practices were begun at the beginning of this period and may have resulted in a change in water quality. Water quality measurements collected before the implementation of management measures were not considered representative of current conditions.
Environmental Conditions:
QAPP Information: NPDES quality assurance.
QAPP Information Reference(s):
 
LOE ID: 26860
 
Pollutant: Ammonia
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Freshwater Replenishment | Preservation of Rare & Endangered Species | Wildlife Habitat
 
Number of Samples: 76
Number of Exceedances: 11
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: 11 of 76 samples exceeded the 30-day average objective and 2 of 280 samples exceeded the one-hour objective for ammonia. Water quality samples were taken and analyzed for ammonia in accordance with the Long Beach Waste Water Reclamation Plant permit monitoring and testing parameters.
Data Reference: NPDES receiving water monitoring reports for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011).
 
Water Quality Objective/Criterion: The Basin Plan states, "In order to protect aquatic life, ammonia concentrations in inland surface waters characteristic of freshwater shall not exceed the values calculated for the appropriate instream conditions shown in Tables 3-1 to 3-3." The one-hour average objective is dependent on pH and the presence or absence of early life stages of fish (ELS) but not temperature. The 30-day average objective is dependent on pH, temperature and ELS in Tables 3-1 to 3-3. The ammonia objectives and the pH and temperature dependent formulas are found in Attachment A of Regional Board Resolution No. 2002-011.
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:
Guideline Reference:
 
Spatial Representation: The Sanitation Districts of Los Angeles County conducted sampling in Coyote Creek in the following receiving water monitoring stations: station RA1 located upstream of discharge from Long Beach Water Reclamation Plant; station RA located downstream of discharge from Long Beach Water Reclamation Plant; and station R9 East located at the downstream end of the pavement lining (near Atherton Street) in the eastern low flow channel of San Gabriel River.
Temporal Representation: Grab samples were taken and analyzed on a weekly basis from December 2004 to January 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County (NPDES No. CA0054119) Monitoring and Reporting Program.
QAPP Information Reference(s): Long Beach Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0054119 (County Sanitation Districts of Los Angeles County)
 
DECISION ID
11170
 
Pollutant: Chloride
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
 
Weight of Evidence: This pollutant is being considered for placement on the section 303(d) list under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.

Two lines of evidence are available in the administrative record to assess this pollutant.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the 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. One of 118 samples exceeded the California Code of Regulations' secondary MCL for Chloride in Coyote Creek and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
RWQCB Board Decision / Staff 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.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 11170
 
LOE ID: 25018
 
Pollutant: Chloride
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 94
Number of Exceedances: 1
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: One of 94 samples exceeded the California Code of Regulations secondary MCL for Chloride in Coyote Creek. Water quality samples were taken and analyzed for Chloride in accordance with the Sanitation Districts of Los Angeles County permit monitoring and testing parameters.
Data Reference: NPDES receiving water monitoring reports for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011).
 
Water Quality Objective/Criterion: The California Code of Regulations' Table 64449-B lists a recommended maximum contamination level (secondary MCL) of 250mg/L for Chloride to protect drinking water sources.
Objective/Criterion Reference: California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring. http://www.cdph.ca.gov/certlic/drinkingwater/Pages/Lawbook.aspx
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The Sanitation Districts of Los Angeles County conducted sampling in Coyote Creek in the following receiving water monitoring stations: receiving water station RA1 located upstream of discharge from Long Beach Water Reclamation Plant; receiving water station RA located downstream of discharge from Long Beach Water Reclamation Plant; and station R9 East located at the downstream end of the pavement lining (near Atherton Street) in the eastern low flow channel of San Gabriel River.
Temporal Representation: Grab samples were taken and analyzed on a monthly basis from June 2004 to February 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County Permit (No. CA0054119) Monitoring and Reporting Program.
QAPP Information Reference(s): Long Beach Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0054119 (County Sanitation Districts of Los Angeles County)
 
LOE ID: 25019
 
Pollutant: Chloride
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Zero of 24 samples exceeded the California Code of Regulations secondary MCL for Chloride in Coyote Creek. Water quality samples were taken and analyzed for Chloride in accordance with the Municipal Separate Storm Sewer System (MS4) permit monitoring and testing parameters.
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: The California Code of Regulations' Table 64449-B lists a recommended maximum contamination level (secondary MCL) of 250mg/L for Chloride to protect drinking water sources.
Objective/Criterion Reference: California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring. http://www.cdph.ca.gov/certlic/drinkingwater/Pages/Lawbook.aspx
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The Los Angeles County Department of Public Works conducted sampling at the mass emission monitoring station S13 located below Spring Street in Coyote Creek (Lat: 33.8098610175, Long: -118.077061937).
Temporal Representation: Grab samples taken and analyzed on a monthly basis from October 2003 to April 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in County of Los Angeles MS4 Permit (NPDES No. CAS004001) Monitoring and Reporting Program.
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
 
DECISION ID
4407
 
Pollutant: Cyanide
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2006)
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is being considered for placement on the 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.

Three lines of evidence are available in the administrative record to assess this pollutant.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the 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. Seven of 162 samples exceeded the Cyanide CTR Criteria Continuous Concentration 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.
 
RWQCB Board Decision / Staff 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.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 4407
 
LOE ID: 2433
 
Pollutant: Cyanide
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 9
Number of Exceedances: 4
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Numeric data generated from 9 samples taken from 11/24/01 to 4/30/03 at one to two-week sampling interval. Four (4) samples exceeded the Cyanide Continuous Criterion Concentration, which equals the highest concentration of a pollutant to which aquatic life can be exposed for an extended period of time (4 days) without deleterious effects (LACDPW, 2004c).
Data Reference: Placeholder reference 2006 303(d)
 
Water Quality Objective/Criterion: CTR Criteria Continuous Concentration of 0.0052 mg/l is the highest concentration of cyanide to which aquatic life can be exposed for an extended period of time (four days) without deleterious effects applicable to protect aquatic life beneficial uses.
Objective/Criterion Reference: Placeholder reference 2006 303(d)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: One sample site sampled during the dry and wet season beginning from 11/24/01 through 4/30/03 at approximately one to two week intervals.
Temporal Representation: Nine samples where taken during the wet and dry season from 11/24/01 to 4/30/03 at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions: The Coyote Creek Monitoring Station (S13) is located at the existing ACOE stream gauge station (Stream Gauge No. F354-R) below Spring Street in the lower San Gabriel River watershed. The site assists in determining mass loading for the San Gabriel River watershed. At this location, the upstream tributary area is 150 square miles (extending into Orange County). The sampling site was chosen to avoid backwater effects from the San Gabriel River. Coyote Creek, at the gauging station, is a concrete lined trapezoidal channel. The Coyote Creek sampling location has been an active stream gauging station since 1963.
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: 2434
 
Pollutant: Cyanide
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 78
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: One of 78 samples exceed the evaluation criteria (LACSD, 2006).
Data Reference: Placeholder reference 2006 303(d)
 
Water Quality Objective/Criterion: CTR Criteria Continuous Concentration of 0.0052 mg/l is the highest concentration of Cyanide to which aquatic life can be exposed for an extended period of time (four days) without deleterious effects applicable to protect aquatic life beneficial uses.
Objective/Criterion Reference: Placeholder reference 2006 303(d)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Three sampling locations: receiving water stations R9E, RA, RA1.
Temporal Representation: Samples collected from July 2001 to July 2005.
Environmental Conditions:
QAPP Information: QA Info Missing
QAPP Information Reference(s):
 
LOE ID: 25093
 
Pollutant: Cyanide
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: 75
Number of Exceedances: 2
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Two of 75 samples exceeded the California Toxics Rule Criterion Continuous Concentration for Cyanide and zero of 75 samples exceeded the Criterion Maximum Concentration. Water quality samples were taken and analyzed for Cyanide in accordance with the Long Beach Waste Water Reclamation Plant permit monitoring and testing parameters.
Data Reference: NPDES receiving water monitoring reports for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011).
 
Water Quality Objective/Criterion: The California Toxics Rule lists a Criterion Continuous Concentration of 5.2 ug/L and a Criterion Maximum Concentration of 22 ug/L for Cyanide to protect aquatic life in freshwater.
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 Sanitation Districts of Los Angeles County conducted sampling in Coyote Creek in the following receiving water monitoring stations: station RA1 located upstream of discharge from Long Beach Water Reclamation Plant; station RA located downstream of discharge from Long Beach Water Reclamation Plant; and station R9 East located at the downstream end of the pavement lining (near Atherton Street) in the eastern low flow channel of San Gabriel River.
Temporal Representation: Grab samples were taken and analyzed on an approximately and monthly basis from August 2004 to February 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County Permit (No. CA0054119) Monitoring and Reporting Program.
QAPP Information Reference(s): Long Beach Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0054119 (County Sanitation Districts of Los Angeles County)
 
DECISION ID
11285
 
Pollutant: Fluoride
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
 
Weight of Evidence: This pollutant is being considered for placement on the section 303(d) list under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.

One line of evidence is available in the administrative record to assess this pollutant. One of the samples exceed the water quality objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the 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. One of 93 samples exceeded the maximum contamination level listed in the California Code of Regulations and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
RWQCB Board Decision / Staff 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.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 11285
 
LOE ID: 25101
 
Pollutant: Fluoride
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 93
Number of Exceedances: 1
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: One of 93 samples exceeded the primary MCL for Fluoride in Coyote Creek. Water quality samples were taken and analyzed for Fluoride in accordance with the Sanitation Districts of Los Angeles County permit monitoring and testing parameters.
Data Reference: NPDES receiving water monitoring reports for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011).
 
Water Quality Objective/Criterion: The California Code of Regulations' Table 64432-A lists a maximum contamination level (primary MCL) of 2.0 mg/L for Fluoride to the protect drinking water sources.
Objective/Criterion Reference: California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring. http://www.cdph.ca.gov/certlic/drinkingwater/Pages/Lawbook.aspx
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The Sanitation Districts of Los Angeles County conducted sampling in Coyote Creek in the following receiving water monitoring stations: receiving water station RA1 located upstream of discharge from Long Beach Water Reclamation Plant; receiving water station RA located downstream of discharge from Long Beach Water Reclamation Plant; and station R9 East located at the downstream end of the pavement lining (near Atherton Street) in the eastern low flow channel of San Gabriel River.
Temporal Representation: Grab samples taken and analyzed on a bimonthly and monthly basis from June 2004 to February 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County Permit (No. CA0054119) Monitoring and Reporting Program.
QAPP Information Reference(s): Long Beach Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0054119 (County Sanitation Districts of Los Angeles County)
 
DECISION ID
11298
 
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
 
Weight of Evidence: This pollutant is being considered for placement on the 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.

One line of evidence is available in the administrative record to assess this pollutant.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the 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. Two of 75 samples exceeded the water and organism consumption criteria for Lindane in Coyote Creek 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.
 
RWQCB Board Decision / Staff 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.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 11298
 
LOE ID: 25111
 
Pollutant: Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 75
Number of Exceedances: 2
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Two of 75 samples exceeded the water and organism consumption criteria for Lindane in Coyote Creek. Water quality samples were taken and analyzed for Lindane in accordance with the Sanitation Districts of Los Angeles County permit monitoring and testing parameters.
Data Reference: NPDES receiving water monitoring reports for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011).
 
Water Quality Objective/Criterion: Lindane is listed as gamma benzene hexachloride (BHC) in CTR. The California Toxics Rule lists water and organism consumption criteria of 0.019 ug/L for Lindane to protect human health.
Objective/Criterion Reference: California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring. http://www.cdph.ca.gov/certlic/drinkingwater/Pages/Lawbook.aspx
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The Sanitation Districts of Los Angeles County conducted sampling in Coyote Creek at receiving water station RA1 located upstream of discharge from Long Beach Water Reclamation Plant and receiving water station RA located downstream of discharge from Long Beach Water Reclamation Plant.
Temporal Representation: Grab samples taken and analyzed on a bimonthly and monthly basis from June 2004 to February 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County Permit (No. CA0054119) Monitoring and Reporting Program.
QAPP Information Reference(s): Long Beach Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0054119 (County Sanitation Districts of Los Angeles County)
 
DECISION ID
4408
 
Pollutant: Nitrogen, Nitrite
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Delist from 303(d) list (TMDL required list)(2006)
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is being considered for placement on the 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.

Four lines lines of evidence are available in the administrative record to assess this pollutant.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the 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. Three of 533 samples exceeded the Basin Plan water quality objective for nitrite-nitrogen (NO2-N) 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.
 
RWQCB Board Decision / Staff 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.
 
SWRCB Board Decision / Staff Recommendation: .
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 4408
 
LOE ID: 2436
 
Pollutant: Nitrogen, Nitrite
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 319
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Out of 319 samples, none exceed the Basin Plan Objective (Green, 2006).
Data Reference: Placeholder reference 2006 303(d)
 
Water Quality Objective/Criterion: The Basin Plan Water Quality Objective for Nitrite-Nitrogen of 1 mg/L.
Objective/Criterion Reference: Placeholder reference 2006 303(d)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Three sites on Coyote Creek
Temporal Representation: Samples were collected June 2003 through August 2005.
Environmental Conditions:
QAPP Information: County Sanitation Districts of Los Angeles County.
QAPP Information Reference(s):
 
LOE ID: 2435
 
Pollutant: Nitrogen, Nitrite
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 21
Number of Exceedances: 2
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Numeric data generated from 21 samples taken from 10/30/00 to 4/30/03 at one to two-week sampling interval. Two samples exceeded the Basin Plan WQO for Nitrite-Nitrogen (LACPWD, 2004c).
Data Reference: Placeholder reference 2006 303(d)
 
Water Quality Objective/Criterion: The Basin Plan Water Quality Objective for Nitrite-Nitrogen of 1 mg/L.
Objective/Criterion Reference: Placeholder reference 2006 303(d)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: One sample site sampled during the dry and wet season beginning from 10/12/00 through 4/30/03 at approximately one to two week intervals.
Temporal Representation: Twenty-one samples where taken during the wet and dry season from 10/12/00 to 4/30/03 at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions: The Coyote Creek Monitoring Station (S13) is located at the existing ACOE stream gage station (Stream Gage No. F354-R) below Spring Street in the lower San Gabriel River watershed. The site assists in determining mass loading for the San Gabriel River watershed. At this location, the upstream tributary area is 150 square miles (extending into Orange County). The sampling site was chosen to avoid backwater effects from the San Gabriel River. Coyote Creek, at the gauging station, is a concrete lined trapezoidal channel. The Coyote Creek sampling location has been an active stream gauging station since 1963.
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: 25117
 
Pollutant: Nitrogen, Nitrite
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Freshwater Replenishment | Preservation of Rare & Endangered Species | Wildlife Habitat
 
Number of Samples: 169
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Zero of 169 samples exceeded the Basin Plan water qualithy objective for nitrite-nitrogen in Coyote Creek. Water quality samples were taken and analyzed for nitrite-nitrogen in accordance with the Sanitation Districts of Los Angeles County permit monitoring and testing parameters.
Data Reference: NPDES receiving water monitoring reports for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011).
 
Water Quality Objective/Criterion: The Basin Plan lists a water quality objective of 1.0 mg/L for nitrite-nitrogen (NO2-N).
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:
Guideline Reference:
 
Spatial Representation: The Sanitation Districts of Los Angeles County conducted sampling in Coyote Creek in the following receiving water monitoring stations: receiving water station RA1 located upstream of discharge from Long Beach Water Reclamation Plant and receiving water station RA located downstream of discharge from Long Beach Water Reclamation Plant.
Temporal Representation: Composite samples were taken approximately six per year (four wet-weather events and two dry-weather events), from September 2005 through February 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County Permit (No. CA0054119) Monitoring and Reporting Program.
QAPP Information Reference(s): Long Beach Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0054119 (County Sanitation Districts of Los Angeles County)
 
LOE ID: 25118
 
Pollutant: Nitrogen, Nitrite
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Freshwater Replenishment | Preservation of Rare & Endangered Species | Wildlife Habitat
 
Number of Samples: 24
Number of Exceedances: 1
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: One of 24 samples exceeded the Basin Plan water quality objective for nitrite-nitrogen in Coyote Creek. Water quality samples were taken and analyzed for nitrite-nitrogen in accordance with the Municipal Separate Storm Sewer System (MS4) permit monitoring and testing parameters.
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: The Basin Plan lists a water quality objective of 1.0 mg/L for nitrite-nitrogen (NO2-N).
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:
Guideline Reference:
 
Spatial Representation: The Los Angeles County Department of Public Works conducted sampling at the mass emission monitoring station S13 located below Spring Street in Coyote Creek (Lat: 33.8098610175, Long: -118.077061937).
Temporal Representation: Composite samples, approximately six per year (four wet-weather events and two dry-weather events), from October 2003 through April 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in County of Los Angeles MS4 Permit (NPDES No. CAS004001) Monitoring and Reporting Program.
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
 
DECISION ID
11281
 
Pollutant: Oxygen, Dissolved
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is being considered for placement on the section 303(d) list under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.

Two lines of evidence are available in the administrative record to assess this pollutant.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the 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. One of 377 samples exceeded the Basin Plan dissolved Oxygen water quality objective for warm water habitat and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
RWQCB Board Decision / Staff 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.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 11281
 
LOE ID: 25099
 
Pollutant: Oxygen, Dissolved
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: 22
Number of Exceedances: 1
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: One of 22 samples exceeded the Basin Plan water quality objectives for dissolved Oxygen in inland surface water bodies. Water quality samples were taken and analyzed for Dissolved Oxygen in accordance with the Sanitation Districts of Los Angeles County permit monitoring and testing parameters.
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: The Basin Plan states, "[t]he dissolved oxygen content of all surface waters designated as WARM shall not be depressed below 5 mg/L as a result of watste discharges."
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:
Guideline Reference:
 
Spatial Representation: The Los Angeles County Department of Public Works conducted sampling at the mass emmission monitoring station S13 located below Spring Street in Coyote Creek (Lat: 33.8098610175, Long: -118.077061937).
Temporal Representation: Composite samples were taken approximately six per year, four wet-weather events and two dry-weather events, from October 2003 through April 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in County of Los Angeles MS4 Permit (NPDES No. CAS004001) Monitoring and Reporting Program.
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: 25100
 
Pollutant: Oxygen, Dissolved
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: 355
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Zero of 22 samples exceeded the Basin Plan water quality objectives for dissolved Oxygen in inland surface water bodies. Water quality samples were taken and analyzed for Dissolved Oxygen in accordance with the Sanitation Districts of Los Angeles County permit monitoring and testing parameters.
Data Reference: NPDES receiving water monitoring reports for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011).
 
Water Quality Objective/Criterion: The Basin Plan states, "[t]he dissolved oxygen content of all surface waters designated as WARM shall not be depressed below 5 mg/L as a result of watste discharges."
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:
Guideline Reference:
 
Spatial Representation: The Sanitation Districts of Los Angeles County conducted sampling in Coyote Creek in the following receiving water monitoring stations: receiving water station RA1 located upstream of discharge from Long Beach Water Reclamation Plant and receiving water station RA located downstream of discharge from Long Beach Water Reclamation Plant.
Temporal Representation: Grab samples were taken and analyzed on a weekly basis from June 2004 to January 2007
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County (NPDES No. CA0054119) Monitoring and Reporting Program.
QAPP Information Reference(s): Long Beach Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0054119 (County Sanitation Districts of Los Angeles County)
 
DECISION ID
11383
 
Pollutant: Pentachlorophenol (PCP)
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is being considered for placement on the 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.

One line of evidence is available in the administrative record to assess this pollutant.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the 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. One of two samples exceeded the maximum contamination level listed in the California Code of Regulations 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.
 
RWQCB Board Decision / Staff 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.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 11383
 
LOE ID: 25141
 
Pollutant: Pentachlorophenol (PCP)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 1
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: One of two samples exceeded the primary MCL for Pentachlorophenol in Coyote Creek. Water quality samples were taken and analyzed for Pentachlorophenol in accordance with the Sanitation Districts of Los Angeles County permit monitoring and testing parameters.
Data Reference: NPDES receiving water monitoring reports for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011).
 
Water Quality Objective/Criterion: The California Code of Regulations' Table 64444-A lists a maximum contamination level (primary MCL) of 0.001 mg/L for Pentachlorophenol to the protect drinking water sources.
Objective/Criterion Reference: California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring. http://www.cdph.ca.gov/certlic/drinkingwater/Pages/Lawbook.aspx
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The Sanitation Districts of Los Angeles County conducted sampling in Coyote Creek in the following receiving water monitoring stations: receiving water station RA1 located upstream of discharge from Long Beach Water Reclamation Plant; receiving water station RA located downstream of discharge from Long Beach Water Reclamation Plant; and station R9 East located at the downstream end of the pavement lining (near Atherton Street) in the eastern low flow channel of San Gabriel River.
Temporal Representation: Grab samples taken and analyzed on a bimonthly and monthly basis from June 2004 to February 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County Permit (No. CA0054119) Monitoring and Reporting Program.
QAPP Information Reference(s): Long Beach Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0054119 (County Sanitation Districts of Los Angeles County)
 
DECISION ID
4339
 
Pollutant: Selenium
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Delist from 303(d) list (TMDL required list)(2006)
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is being considered for placement on the 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.

Four lines of evidence are available in the administrative record to assess this pollutant.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the 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. 12 of 149 samples exceeded the California Toxics Rule Criterion Continuous Concentration for Selenium 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.
 
RWQCB Board Decision / Staff 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.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 4339
 
LOE ID: 25164
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Preservation of Rare & Endangered Species | Wildlife Habitat
 
Number of Samples: 19
Number of Exceedances: 6
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Six of 19 samples exceeded the California Toxics Rule Criterion Continuous Concentration for Selenium. Water quality samples were taken and analyzed for Selenium in accordance with the Municipal Separate Storm Sewer System (MS4) permit monitoring and testing parameters.
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: The California Toxics Rule lists a Criterion Continuous Concentration of 5.0 ug/L for Selenium to protect aquatic life in freshwater.
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 Los Angeles County Department of Public Works conducted sampling at the mass emission monitoring station S13 located below Spring Street in Coyote Creek (Lat: 33.8098610175, Long: -118.077061937).
Temporal Representation: Composite samples, approximately six per year (four wet-weather events and two dry-weather events), from October October 2004 through April 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in County of Los Angeles MS4 Permit (NPDES No. CAS004001) Monitoring and Reporting Program.
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: 2426
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 38
Number of Exceedances: 1
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Numeric data generated from a total of 38 samples taken at three different Los Angeles County Sanitation District sampling stations (sampling stations RA1, RA, R9E) between 8/3/95 and 5/11/04 at different sampling intervals. One sample in station RA1 taken 7/14/03 exceeded the total selenium continuous criterion concentration, which equals the highest concentration of a pollutant to which aquatic life can be exposed for an extended period of time (4days) without deleterious effects (LACSD, 2004b).
Data Reference: Placeholder reference 2006 303(d)
 
Water Quality Objective/Criterion: CTR Selenium Criterion for Continuous Concentration in water for the protection of aquatic life is 5 ug/l, expressed in the total recoverable form. The criterion is 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: Three (3) sample sites sampled between 8/3/95 and 5/11/04 at different sampling intervals.
Temporal Representation: Thirty-eight samples were taken at three sampling stations primarily during the dry season between 8/3/95 to 5/11/04.
Environmental Conditions: Results are from samples taken from 1995 to 2004 by the LA County Sanitation Districts. Data primarily reflects dry weather conditions.
QAPP Information: Quality Assurance Document Of The County Sanitation Districts Of Los Angeles County. July 2003.
QAPP Information Reference(s):
 
LOE ID: 2425
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 64
Number of Exceedances: 4
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Numeric data generated from 64 samples taken from 11/10/97 to 1/13/04 at one to two-week sampling interval. Four samples exceeded the total selenium continuous criterion concentration, which equals the highest concentration of a pollutant to which aquatic life can be exposed for an extended period of time without deleterious effects (LACDPW, 2004c).
Data Reference: Placeholder reference 2006 303(d)
 
Water Quality Objective/Criterion: CTR Selenium Criterion for Continuous Concentration in water for the protection of aquatic life is 5 ug/l, expressed in the total recoverable form. The criterion is 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 collected at one sampling site from during primarily the wet season beginning from 11/10/97 through 1/13/04 at approximately one to two week intervals.
Temporal Representation: Sixty-four samples taken during primarily the wet season from 11/10/97 to 1/13/04 at approximately one to two week intervals.
Environmental Conditions: Results are from samples taken from 1997 to 2004 by the LADPW. Sampling was carried out at Spring Street station (S13) on Coyote Creek during primarily wet season 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):
 
LOE ID: 25162
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Preservation of Rare & Endangered Species | Wildlife Habitat
 
Number of Samples: 28
Number of Exceedances: 1
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: One of 28 samples exceeded the California Toxics Rule Criterion Continuous Concentration for Selenium. Water quality samples were taken and analyzed for Selenium in accordance with the Sanitation Districts of Los Angeles County permit monitoring and testing parameters.
Data Reference: NPDES receiving water monitoring reports for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011).
 
Water Quality Objective/Criterion: The California Toxics Rule lists a Criterion Continuous Concentration of 5.0 ug/L for Selenium to protect aquatic life in freshwater.
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 Sanitation Districts of Los Angeles County conducted sampling in Coyote Creek in the following receiving water monitoring stations: station RA1 located upstream of discharge from Long Beach Water Reclamation Plant; station RA located downstream of discharge from Long Beach Water Reclamation Plant; and station R9 East located at the downstream end of the pavement lining (near Atherton Street) in the eastern low flow channel of San Gabriel River.
Temporal Representation: Grab samples were taken and analyzed on an approximately monthly basis from August 2004 to February 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County Permit (No. CA0054119) Monitoring and Reporting Program.
QAPP Information Reference(s): Long Beach Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0054119 (County Sanitation Districts of Los Angeles County)
 
DECISION ID
11394
 
Pollutant: Sulfates
Final Listing Decision: List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Sources: Minor Municipal Point Source-dry and/or wet weather discharge | Wastewater
Expected TMDL Completion Date: 2021
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is being considered for placement on the section 303(d) list under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.

Two lines of evidence are available in the administrative record to assess this pollutant.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the 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. 61 of 118 samples exceed the California Code of Regulations secondary MCL for sulfate in Coyote Creek and this exceeds the allowable frequency listed in Table 3.2 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
 
RWQCB Board Decision / Staff Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 11394
 
LOE ID: 25144
 
Pollutant: Sulfates
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 24
Number of Exceedances: 8
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Eight of 24 samples exceeded the California Code of Regulations secondary MCL for sulfate in Coyote Creek. Water quality samples were taken and analyzed for Sulfate in accordance with the Municipal Separate Storm Sewer System (MS4) permit monitoring and testing parameters.
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: The California Code of Regulations' Table 64449-B lists a recommended maximum contamination level (secondary MCL) of 250 mg/L for Sulfate to protect drinking water sources.
Objective/Criterion Reference: California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring. http://www.cdph.ca.gov/certlic/drinkingwater/Pages/Lawbook.aspx
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The Los Angeles County Department of Public Works conducted sampling at the mass emission monitoring station S13 located below Spring Street in Coyote Creek (Lat: 33.8098610175, Long: -118.077061937).
Temporal Representation: Composite samples were taken approximately six per year (four wet-weather events and two dry-weather events), from October 2003 through April 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in County of Los Angeles MS4 Permit (NPDES No. CAS004001) Monitoring and Reporting Program.
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: 25142
 
Pollutant: Sulfates
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 94
Number of Exceedances: 53
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: 53 of 94 samples exceeded the Basin Plan California Code of Regulations secondary MCL for Sulfate in Coyote Creek. Water quality samples were taken and analyzed for Sulfate in accordance with the Sanitation Districts of Los Angeles County permit monitoring and testing parameters.
Data Reference: NPDES receiving water monitoring reports for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011).
 
Water Quality Objective/Criterion: The California Code of Regulations' Table 64449-B lists a recommended maximum contamination level (secondary MCL) of 250 mg/L for Sulfate to protect drinking water sources.
Objective/Criterion Reference: California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring. http://www.cdph.ca.gov/certlic/drinkingwater/Pages/Lawbook.aspx
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The Sanitation Districts of Los Angeles County conducted sampling in Coyote Creek in the following receiving water monitoring stations: receiving water station RA1 located upstream of discharge from Long Beach Water Reclamation Plant; receiving water station RA located downstream of discharge from Long Beach Water Reclamation Plant; and station R9 East located at the downstream end of the pavement lining (near Atherton Street) in the eastern low flow channel of San Gabriel River.
Temporal Representation: Grab samples taken and analyzed on a bimonthly and monthly basis from June 2004 to February 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County Permit (No. CA0054119) Monitoring and Reporting Program.
QAPP Information Reference(s): Long Beach Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0054119 (County Sanitation Districts of Los Angeles County)
 
DECISION ID
11459
 
Pollutant: Total Dissolved Solids
Final Listing Decision: List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Sources: Source Unknown
Expected TMDL Completion Date: 2021
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is being considered for placement on the section 303(d) list under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.

Two lines of evidence are available in the administrative record to assess this pollutant.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the 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. 104 of 118 samples exceeded the Basin Plan site specific water quality objective for total dissolved solids and this exceeds the allowable frequency listed in Table 3.2 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
 
RWQCB Board Decision / Staff Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 11459
 
LOE ID: 25172
 
Pollutant: Total Dissolved Solids
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: 94
Number of Exceedances: 93
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: 93 of 94 samples exceeded the California Code of Regulations' secondary MCL for Total Dissolved Solids in Coyote Creek. Water quality samples were taken and analyzed for Total Dissolved Solids in accordance with the Sanitation Districts of Los Angeles County permit monitoring and testing parameters.
Data Reference: NPDES receiving water monitoring reports for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011).
 
Water Quality Objective/Criterion: The California Code of Regulations' Table 64449-B lists a recommended maximum contamination level (secondary MCL) of 500 mg/L for Total Dissolved Solids to protect drinking water sources.
Objective/Criterion Reference: California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring. http://www.cdph.ca.gov/certlic/drinkingwater/Pages/Lawbook.aspx
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The Sanitation Districts of Los Angeles County conducted sampling in Coyote Creek in the following receiving water monitoring stations: receiving water station RA1 located upstream of discharge from Long Beach Water Reclamation Plant; receiving water station RA located downstream of discharge from Long Beach Water Reclamation Plant; and station R9 East located at the downstream end of the pavement lining (near Atherton Street) in the eastern low flow channel of San Gabriel River.
Temporal Representation: Grab samples taken and analyzed on a bimonthly and monthly basis from June 2004 to February 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County Permit (No. CA0054119) Monitoring and Reporting Program.
QAPP Information Reference(s): Long Beach Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0054119 (County Sanitation Districts of Los Angeles County)
 
LOE ID: 25173
 
Pollutant: Total Dissolved Solids
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: 24
Number of Exceedances: 11
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: 11 of 24 samples exceeded the California Code of Regulations' secondary MCL for Total Dissolved Solids in Coyote Creek. Water quality samples were taken and analyzed for Total Dissolved Solids in accordance with the Municipal Separate Storm Sewer System (MS4) permit monitoring and testing parameters.
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: The California Code of Regulations' Table 64449-B lists a recommended maximum contamination level (secondary MCL) of 500 mg/L for Total Dissolved Solids to protect drinking water sources.
Objective/Criterion Reference: California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring. http://www.cdph.ca.gov/certlic/drinkingwater/Pages/Lawbook.aspx
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The Los Angeles County Department of Public Works conducted sampling at the mass emission monitoring station S13 located below Spring Street in Coyote Creek (Lat: 33.8098610175, Long: -118.077061937).
Temporal Representation: Composite samples, approximately six per year (four wet-weather events and two dry-weather events), from October 2003 through April 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in County of Los Angeles MS4 Permit (NPDES No. CAS004001) Monitoring and Reporting Program.
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
 
DECISION ID
4549
 
Pollutant: Copper, Dissolved
Final Listing Decision: List on 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision: Do Not Delist from 303(d) list (TMDL required list)(2006)
Revision Status Revised
Sources: Source Unknown
TMDL Name: San Gabriel River Metals (39)
TMDL Project Code: 385
Date TMDL Approved by USEPA: 03/27/2007
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is being considered for removal from the section 303(d) list under section 2.2 and 4.1 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status.

Five lines of evidence are available in the administrative record to assess this pollutant.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the section 303(d) list. There is sufficient justification to place it in the Being Addressed portion of the 303(d) list because a TMDL has been completed and established by 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. 24 of 76 samples exceeded the lead CTR Criterion Continuous Concentration for the dissolved fraction, four of 178 samples exceeded the lead CTR Criterion Continuous Concentration for the total fraction, and this exceeds the allowable frequency listed in Table 4.1 of the Listing Policy for the dissolved fraction.
4.The San Gabriel River Metals TMDL has been established by USEPA on 03/26/2007.
5. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
 
RWQCB Board Decision / Staff Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the Water Quality Limited Segments Being Addressed category of the section 303(d) list because a TMDL has been established by USEPA, and applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 4549
 
LOE ID: 2429
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 62
Number of Exceedances: 19
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Numeric data generated from 62 samples taken from 11/10/97 to 1/7/05 at one to two-week sampling interval. Nineteen samples exceeded the dissolved copper continuous criterion concentration (CCC) (LARWQCB, 2006).
Data Reference: Placeholder reference 2006 303(d)
 
Water Quality Objective/Criterion: CTR Dissolved Copper 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 copper is the highest concentration to which aquatic life can be exposed for an extended period of time (four days) without deleterious effects. This criterion is 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: Station S13 on Coyote Creek.
Temporal Representation: Samples collected between 11/10/97 and 1/7/05.
Environmental Conditions:
QAPP Information: San Gabriel River metals TMDL monitoring.
QAPP Information Reference(s):
 
LOE ID: 2432
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 21
Number of Exceedances:
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Numeric data generated from 21 samples taken from 10/30/00 to 4/30/03 at one to two-week sampling interval. It was not possible to determine any exceedances of total copper concentration in this water body because there is not guideline applicable to assess total copper (LACDPW, 2004).
Data Reference: Placeholder reference 2006 303(d)
 
Water Quality Objective/Criterion: There is no guideline for total copper.
Objective/Criterion Reference: Placeholder reference 2006 303(d)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: One sample site sampled during the dry and wet season beginning from 10/12/00 through 4/30/03 at approximately one to two week intervals.
Temporal Representation: Twenty-one samples where taken during the wet and dry season from 10/12/00 to 4/30/03 at approximately one to two week intervals as part of the Los Angeles County Storm water monitoring program prepared by the Los Angeles County Department of Public Works.
Environmental Conditions: The Coyote Creek Monitoring Station (S13) is located at the existing ACOE stream gauge station (Stream Gauge No. F354-R) below Spring Street in the lower San Gabriel River watershed. The site assists in determining mass loading for the San Gabriel River watershed. At this location, the upstream tributary area is 150 square miles (extending into Orange County). The sampling site was chosen to avoid backwater effects from the San Gabriel River. Coyote Creek, at the gauging station, is a concrete lined trapezoidal channel. The Coyote Creek sampling location has been an active stream gauging station since 1963.
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: 25036
 
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: 14
Number of Exceedances: 5
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Five of 14 samples exceeded the hardness dependent California Toxics Rule Criterion Continuous Concentration for copper and two of 14 samples exceeded the hardness dependent California Toxics Rule Criterion Maximum Concentration. Water quality samples were taken and analyzed for Copper in accordance with the Municipal Separate Storm Sewer System (MS4) permit monitoring and testing parameters.
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: The California Toxics Rule lists Criterion Continuous Concentrations for copper to protect aquatic life in freshwater. The copper criterion in freshwater is hardness dependent for each sample and varies based on the on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for metals criterion.
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 Los Angeles County Department of Public Works conducted sampling at the mass emission monitoring station S13 located below Spring Street in Coyote Creek (Lat: 33.8098610175, Long: -118.077061937).
Temporal Representation: Composite samples were taken approximately six per year (four wet-weather events and two dry-weather events), from March 2005 through April 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in County of Los Angeles MS4 Permit (NPDES No. CAS004001) Monitoring and Reporting Program.
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: 25038
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Preservation of Rare & Endangered Species | Wildlife Habitat
 
Number of Samples: 157
Number of Exceedances: 4
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Four of 157 samples exceeded the California Toxics Rule Criterion Continuous Concentration for Copper and three of 157 samples exceeded the Criterion Maximum Concentration. Water quality samples were taken and analyzed for Copper in accordance with the Long Beach Waste Water Reclamation Plant permit monitoring and testing parameters.
Data Reference: NPDES receiving water monitoring reports for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011).
 
Water Quality Objective/Criterion: The California Toxics Rule lists Criterion Maximum Concentrations and Criterion Continuous Concentrations for Copper to protect aquatic life in freshwater. The Copper criteria in freshwater is hardness dependent for each sample and varies based on the on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for metals criteria.
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 Sanitation Districts of Los Angeles County conducted sampling in Coyote Creek in the following receiving water monitoring stations: station RA1 located upstream of discharge from Long Beach Water Reclamation Plant; station RA located downstream of discharge from Long Beach Water Reclamation Plant; and station R9 East located at the downstream end of the pavement lining (near Atherton Street) in the eastern low flow channel of San Gabriel River.
Temporal Representation: Grab samples were taken and analyzed on an approximately and monthly basis from August 2004 to February 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County (NPDES No. CA0054119) Monitoring and Reporting Program.
QAPP Information Reference(s): Long Beach Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0054119 (County Sanitation Districts of Los Angeles County)
 
LOE ID: 28699
 
Pollutant: Copper
LOE Subgroup: Narrative Description Data
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Preservation of Rare & Endangered Species | Wildlife Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: A TMDL has been established for this water segment-pollutant combination. The San Gabriel River MetalsTMDL was established by USEPA on March 26, 2007.
Data Reference: Staff report, appendix, and letter to SWRCB and Los Angeles RWQCB establishing a TMDL for Metals in the San Gabriel River Watershed.
 
Water Quality Objective/Criterion:
Objective/Criterion Reference:
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation:
Temporal Representation:
Environmental Conditions:
QAPP Information: QA information unavailable.
QAPP Information Reference(s):
 
DECISION ID
4518
 
Pollutant: Lead
Final Listing Decision: List on 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision: Do Not Delist from 303(d) list (TMDL required list)(2006)
Revision Status Revised
Sources: Major Municipal Point Source-wet weather discharge
TMDL Name: San Gabriel River Metals (39)
TMDL Project Code: 385
Date TMDL Approved by USEPA: 03/27/2007
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is being considered for removal on the section 303(d) list under sections 2.2 and 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.

Three lines of evidence are available in the administrative record to assess this pollutant. Data from lines of evidence 2428 and 2438 will not be considered and will be disassociated in this decision due to lines of evidence 21346 and 21353 including all the data listed in lines of evidence 2428 and 2438 along with newer data.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the section 303(d) list. There is sufficient justification to place it in the Being Addressed portion of the 303(d) list because a TMDL has been completed and established by USEPA, and is expected to result in attainment of the standard.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the
Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. Seven of 45 samples exceeded the lead CTR Criterion Continuous Concentration for the dissolved fraction, zero out of 75 samples exceeded the lead CTR Criterion Continuous Concentration for the total fraction, and this exceeds the allowable frequency listed in Table 4.1 of the Listing Policy for the dissolved fraction.
4.The San Gabriel River Metals TMDL has been established by USEPA on 03/26/2007.
5. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
 
RWQCB Board Decision / Staff Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the Water Quality Limited Segments Being Addressed category of the section 303(d) list because a TMDL has been established by USEPA, and applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 4518
 
LOE ID: 21353
 
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: 45
Number of Exceedances: 7
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Seven of 45 samples exceeded the hardness dependent California Toxics Rule Criterion Continuous Concentration for lead and zero of 100 samples exceeded the hardness dependent Criterion Maximum Concentration. Water quality samples were taken and analyzed for lead in accordance with the Municipal Separate Storm Sewer System (MS4) permit monitoring and testing parameters.
Data Reference: Lead Monitoring Data (MS4 Data) for Coyote Creek. 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: The California Toxics Rule lists Criterion Continuous Concentrations for Lead to protect aquatic life in freshwater. The Lead criterion in freshwater is hardness dependent for each sample and varies based on the on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for metals criteria.
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 Los Angeles County Department of Public Works conducted sampling at the mass emission monitoring station S13 located below Spring Street in Coyote Creek (Lat: 33.8098610175, Long: -118.077061937).
Temporal Representation: Composite samples, sampled periodically throughout the year from June 1995 through April 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in County of Los Angeles MS4 Permit (NPDES No. CAS004001) Monitoring and Reporting Program.
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: 28716
 
Pollutant: Lead
LOE Subgroup: Narrative Description Data
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Preservation of Rare & Endangered Species | Wildlife Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: A TMDL has been established for this water segment-pollutant combination. The San Gabriel River MetalsTMDL was established by USEPA on March 26, 2007.
Data Reference: Staff report, appendix, and letter to SWRCB and Los Angeles RWQCB establishing a TMDL for Metals in the San Gabriel River Watershed.
 
Water Quality Objective/Criterion:
Objective/Criterion Reference:
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation:
Temporal Representation:
Environmental Conditions:
QAPP Information: QA information unavailable.
QAPP Information Reference(s):
 
LOE ID: 21346
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Preservation of Rare & Endangered Species | Wildlife Habitat
 
Number of Samples: 75
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Zero of 75 samples exceeded the hardness dependent California Toxics Rule Criterion Maximum Concentration for Lead and zero of 75 samples exceeded the hardness dependent California Toxics Rule Criterion Continuous Concentration for Lead. Water quality samples were taken and analyzed for Lead in accordance with the Sanitation Districts of Los Angeles County permit monitoring and testing parameters.
Data Reference: NPDES receiving water monitoring reports for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011).
  NPDES receiving water metals data for Long Beach Water Reclamation Plant (NPDES No. CA0054119), Los Coyotes Water Reclamation Plant (NPDES No. CA0053716), Pomona Water Reclamation Plant (NPDES No. CA0053911), San Jose Creek Water Reclamation Plant (NPDES No. CA0053619), and Whittier Narrows Creek Water Reclamation Plant (NPDES No. CA0054011).
 
Water Quality Objective/Criterion: The California Toxics Rule lists Criterion Continuous Concentrations for Lead to protect aquatic life in freshwater. The Lead criterion in freshwater is hardness dependent for each sample and varies based on the on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for metals criteria.
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 Sanitation Districts of Los Angeles County conducted sampling in Coyote Creek in the following receiving water monitoring stations: station RA1 located upstream of discharge from Long Beach Water Reclamation Plant; station RA located downstream of discharge from Long Beach Water Reclamation Plant; and station R9 East located at the downstream end of the pavement lining (near Atherton Street) in the eastern low flow channel of San Gabriel River.
Temporal Representation: Grab samples were taken and analyzed on a yearly basis from August 1995 to July 2001 and on a bimonthly and monthly basis from July 2001 to February 2007
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County Permit (No. CA0054119) Monitoring and Reporting Program.
QAPP Information Reference(s): Long Beach Water Reclamation Plant Monitoring and Reporting Program for NPDES No. CA0054119 (County Sanitation Districts of Los Angeles County)