Draft California 2014 Integrated Report (303(d) List/305(b) Report)

Supporting Information

Regional Board 4 - Los Angeles Region

Water Body Name: Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
Water Body ID: CAR4052100019990202090157
Water Body Type: River & Stream
 
DECISION ID
34632
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Lead
Final Listing Decision: Delist from 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (being addressed by USEPA approved TMDL)(2012)
Revision Status Revised
Reason for Delisting: Applicable WQS attained; due to restoration activities
TMDL Name: Los Angeles River Metals (13)
TMDL Project Code: 237
Date TMDL Approved by USEPA: 12/22/2005
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for removal from the CWA section 303(d) List under section 4.1 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status.

2 lines of evidence are available in the administrative record to assess this pollutant.
1 of the 93 samples exceeded the CRITERIA.
0 of the 0 samples exceeded the CRITERIA.

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 CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 1 of 93 and 0 of 0 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 4.1 of the Listing Policy.
4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision 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.
 
 
Line of Evidence (LOE) for Decision ID 34632, Lead
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 86010
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
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 the 93 samples exceeded the hardness adjusted criteria.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. If no hardness data were available, a value of 100 mg/L was used.
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The River was sampled between Figueroa St. and Riverside Dr.
Temporal Representation: One sample was collected in 2007, two samples was collected in 2008, three samples were collected in 2009, and one sample was collected in 2010.
Environmental Conditions: There was no special environmental condition reported.
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.los angeles river
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 34632, Lead
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 2511
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Unspecified--This LOE is a placeholder to support a listing decision made by USEPA for 2006.
Data Reference: Placeholder reference 2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion:
Objective/Criterion Reference:
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation:
Temporal Representation:
Environmental Conditions:
QAPP Information: QA Info Missing
QAPP Information Reference(s):
 
 
DECISION ID
32974
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Ammonia
Final Listing Decision: Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (being addressed by USEPA approved TMDL)(2012)
Revision Status Revised
Sources: Nonpoint Source | Point Source
TMDL Name: Los Angeles River Nitrogen (11)
TMDL Project Code: 229
Date TMDL Approved by USEPA: 03/18/2004
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for removal from the CWA 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.

2 lines of evidence are available in the administrative record to assess pollutant.
0 of 0 samples exceeded the CRITERIA.
33 of 111 samples exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 0 and 33 of 111 samples exceeded the CRITERIA and this exceeds the allowable frequency listed in Table 4.1 of the Listing Policy.
4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
 
 
Line of Evidence (LOE) for Decision ID 32974, Ammonia
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 86019
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 51
Number of Exceedances: 13
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: 13 out of 51 monthly averages exceeded the site specific basin plan objective for total ammonia as nitrogen. All exceedences occurred 2007 and prior.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: he Los Angeles Regional Water Quality Control Plan objective for ammonia is a function of pH, temperature, and the presence of early life stages. Site specific objectives for this waterbody are based upon the presence of early life stages and found in Table 3-4. "Site-Specific 30-day Average Objectives for Ammonia by Waterbody Reach." Site specific objectives are applied as if early life stages are absent (dates ranging October 1 to March 31).
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected in three locations: LAG R4, LAG R5, and LAG R7.
Temporal Representation: Samples were collected weekly from 07/2005 through 06/2010. Only samples collected from the months of October 1 to March 31 have been included.
Environmental Conditions:
QAPP Information: All samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 32974, Ammonia
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 2507
 
Pollutant: Ammonia
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Data Reference: Placeholder reference 2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion:
Objective/Criterion Reference:
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation:
Temporal Representation:
Environmental Conditions:
QAPP Information: QA Info Missing
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 32974, Ammonia
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85894
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 60
Number of Exceedances: 20
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: 20 out of 60 monthly averages exceeded the site specific basin plan objective for total ammonia as nitrogen. All the exceedences were 2007 and prior.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Los Angeles Regional Water Quality Control Plan objective for ammonia is a function of pH, temperature, and the presence of early life stages. Site specific objectives for this waterbody are based upon the presence of early life stages and found in Table 3-4. "Site-Specific 30-day Average Objectives for Ammonia by Waterbody Reach." Site specific objectives are applied as if early life stages are present (dates ranging April 1 to September 30).
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected in three locations: LAG R4, LAG R5, and LAG R7.
Temporal Representation: Samples were collected weekly from 07/2005 through 06/2010. Only samples collected from the months of April 1 to September 30 have been included.
Environmental Conditions:
QAPP Information: All samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.
QAPP Information Reference(s):
 
 
DECISION ID
33775
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Copper
Final Listing Decision: Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (being addressed by USEPA approved TMDL)(2012)
Revision Status Revised
Sources: Source Unknown
TMDL Name: Los Angeles River Metals (13)
TMDL Project Code: 237
Date TMDL Approved by USEPA: 10/29/2008
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for removal on the CWA section 303(d) List under sections 2.2 and 3.1 of the Listing Policy. Under SECTION 3.1 of the Policy, a minimum of one line of evidence is needed to assess listing status.

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

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

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 8 of 93 samples exceeded the CRITERIA and these exceed the allowable frequency listed in Table 3.1of the Listing Policy.
4. The Los Angeles Metals TMDL was approved by USEPA on 12/22/2005
5. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

There is sufficient justification to place this waterbody/pollutant in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by USEPA, and is expected to result in attainment of the standard.

This conclusion is based on the staff findings that:
1. The Los Angeles River Metals TMDL was approved by USEPA on 10/29/2008.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
 
 
Line of Evidence (LOE) for Decision ID 33775, Copper
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85997
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 93
Number of Exceedances: 8
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Eight of the 93 samples exceeded the hardness adjusted criteria.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. If no hardness data were available, a value of 100 mg/L was used.
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The River was sampled between Figueroa St. and Riverside Dr.
Temporal Representation: One sample was collected in 2007, two samples was collected in 2008, three samples were collected in 2009, and one sample was collected in 2010.
Environmental Conditions: There was no special environmental condition reported.
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.los angeles river
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 33775, Copper
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 2510
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Unspecified--This LOE is a placeholder to support a listing decision made by USEPA for 2006.
Data Reference: Placeholder reference 2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion:
Objective/Criterion Reference:
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation:
Temporal Representation:
Environmental Conditions:
QAPP Information: QA Info Missing
QAPP Information Reference(s):
 
 
DECISION ID
64357
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: 1,1,2-Trichloroethane
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence are necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 6 samples exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 6 samples exceeded the CRITERIA and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to SECTION 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
 
Line of Evidence (LOE) for Decision ID 64357, 1,1,2-Trichloroethane
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85990
 
Pollutant: 1,1,2-Trichloroethane
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 6
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: All of the samples were below criteria.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: The USEPA National Recomm. WQ criteria, chronic tox info, is 9,400 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
 
Spatial Representation: The River was sampled between Figueroa St. and Riverside Dr.
Temporal Representation: One sample was collected in 2007, two samples was collected in 2008, two samples were collected in 2009, and one sample was collected in 2010.
Environmental Conditions: There was no special environmental condition reported.
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.los angeles river
QAPP Information Reference(s):
 
 
DECISION ID
64358
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Acrolein
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence are necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 6 samples exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 6 samples exceeded the CRITERIA and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to SECTION 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
 
Line of Evidence (LOE) for Decision ID 64358, Acrolein
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85991
 
Pollutant: Acrolein
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 7
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: All of the samples were below criteria.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: The USEPA National Recomm. WQ criteria, 4-day avg. is 3 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The River was sampled between Figueroa St. and Riverside Dr.
Temporal Representation: One sample was collected in 2007, two samples was collected in 2008, three samples were collected in 2009, and one sample was collected in 2010.
Environmental Conditions: There was no special environmental condition reported.
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.los angeles river
QAPP Information Reference(s):
 
 
DECISION ID
64366
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Aldrin
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 24 samples exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 24 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
 
Line of Evidence (LOE) for Decision ID 64366, Aldrin
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85992
 
Pollutant: Aldrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: All of the samples were below criteria.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: The California Toxics Rule, instantaneous max. is 1.5 ug/L.
Guideline 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
 
Spatial Representation: The River was sampled between Figueroa St. and Riverside Dr.
Temporal Representation: One sample was collected in 2007, two samples was collected in 2008, three samples were collected in 2009, and one sample was collected in 2010.
Environmental Conditions: There was no special environmental condition reported.
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.los angeles river
QAPP Information Reference(s):
 
 
DECISION ID
64367
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Arsenic
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 24 samples exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 24 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
 
Line of Evidence (LOE) for Decision ID 64367, Arsenic
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85993
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 46
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: None of the 46 samples exceeded the CTR.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The CTR for arsenic is 150 ug/L.
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The River was sampled between Figueroa St. and Riverside Dr.
Temporal Representation: One sample was collected in 2007, two samples was collected in 2008, three samples were collected in 2009, and one sample was collected in 2010.
Environmental Conditions: There was no special environmental condition reported.
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.los angeles river
QAPP Information Reference(s):
 
 
DECISION ID
66229
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Benthic Community Effects
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: Benthic Community Effects is being considered for placement on the CWA section 303(d) List under sections 3.9 of the Listing Policy.

Under section 3.9, additional lines of evidence associating the Benthic Community Effects with a water or sediment concentration of pollutants and there are multiple lines of evidence for other impairments.

Three samples were collected from the Los Angeles River Reach 3 over three years. Four of the four samples collected had an IBI score below 40. However, this section of the Los Angeles River Reach 3 is entirely lined in concrete and benthic community condition scores have not been specifically calibrated for concrete-lined channels.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing Benthic Community Effects in this water segment on the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. Three samples were collected from Los Angeles River Reach 3over two years. Four of the four samples collected had an IBI score below 40. However, benthic community condition scores have not been specifically calibrated for concrete-lined channels.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

The CSCI is applicable statewide, accounts for a much wider range of natural variability, and provides equivalent scoring thresholds in all regions of the state. The CSCI will be used in the future for water quality assessment purposes statewide over the regional indices of biologic integrity (IBIs).
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
 
Line of Evidence (LOE) for Decision ID 66229, Benthic Community Effects
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85994
 
Pollutant: Benthic-Macroinvertebrate Bioassessments
LOE Subgroup: Population/Community Degradation
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 4
 
Data and Information Type: Benthic macroinvertebrate surveys
Data Used to Assess Water Quality: Four samples were collected from two sites on the Los Angeles River over two years. Four of the four samples collected had IBI scores below 40. The scores were 7 and 0 (2006) and 17 and 0 (2007).
Data Reference: Bioassessment Monitoring Report in Los Angeles County, 2006-2008.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant or animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analysis of species diversity, population density, growth anomalies, bioassays of appropriate duration or other appropriate methods as specified by the State or Regional Board.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: The IBI is a multi-metric assessment that employs biological metrics that respond to a habitat or water quality impairment. Each of the biological metrics measured at a site are converted to an IBI score then summed. These cumulative scores are then ranked. For the Southern California IBI, sites with scores below 40 are considered to have impaired conditions.
Guideline Reference: Development of a Benthic Index of Biotic Integrity (B-IBI) for Wadeable Streams in Northern Coastal California and its Application to Regional 305(b) Assessment
 
Spatial Representation: The samples were collected from Los Angeles River near confluence with Arroyo Seco Channel, station 12 and Los Angeles River at Victory Blvd, station 11.
Temporal Representation: The samples were collected in 2006 and 2007.
Environmental Conditions:
QAPP Information: Qaulity assurance is good. Los Angeles County Department of Public Works (LACDPW) contracted Weston Solutions, Inc. to perform biological assessments. Sampling and analysis followed the protocols described in the California Stream Bioassessment Procedure (CSBP) (Harrington, 2003), and also incorporated the Southern California Index of Biotic Integrity (IBI) (Ode et al., 2005).
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 66229, Benthic Community Effects
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85894
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 60
Number of Exceedances: 20
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: 20 out of 60 monthly averages exceeded the site specific basin plan objective for total ammonia as nitrogen. All the exceedences were 2007 and prior.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Los Angeles Regional Water Quality Control Plan objective for ammonia is a function of pH, temperature, and the presence of early life stages. Site specific objectives for this waterbody are based upon the presence of early life stages and found in Table 3-4. "Site-Specific 30-day Average Objectives for Ammonia by Waterbody Reach." Site specific objectives are applied as if early life stages are present (dates ranging April 1 to September 30).
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected in three locations: LAG R4, LAG R5, and LAG R7.
Temporal Representation: Samples were collected weekly from 07/2005 through 06/2010. Only samples collected from the months of April 1 to September 30 have been included.
Environmental Conditions:
QAPP Information: All samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 66229, Benthic Community Effects
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85936
 
Pollutant: Toxicity
LOE Subgroup: Toxicity
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 75
Number of Exceedances: 29
 
Data and Information Type: TOXICITY TESTING
Data Used to Assess Water Quality: Seventy-five samples were collected to evaluate water toxicity. Twenty-nine of the 75 samples exhibited significant toxicity. The toxicity tests included acute toxicity using Atherinops affinis and chronic toxicity using Ceriodaphnia dubia, Selenastrum capricornutum and Pimephales promelas.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. The t-test is used to determine if there is a statistically significant decrease in organism response in the sample as compared to the control.
Guideline Reference: Short-term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms. Fourth Edition. Office of Water, U.S. Environmental Protection Agency. Washington, D.C. EPA-821-R-02-013
 
Spatial Representation: The samples were collected at Los Angeles River R4, R5 and R7.
Temporal Representation: The samples were collected every three months from November 2005 to May 2010.
Environmental Conditions:
QAPP Information: The quality assurance manual for the Environmental Monitoring Division Bureau of Sanitation, Department of Public Works, City of Los Angeles was provided. Toxicity testing methods and requirements are in the NPDES permit CA0053953.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 66229, Benthic Community Effects
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 86010
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
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 the 93 samples exceeded the hardness adjusted criteria.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. If no hardness data were available, a value of 100 mg/L was used.
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The River was sampled between Figueroa St. and Riverside Dr.
Temporal Representation: One sample was collected in 2007, two samples was collected in 2008, three samples were collected in 2009, and one sample was collected in 2010.
Environmental Conditions: There was no special environmental condition reported.
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.los angeles river
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 66229, Benthic Community Effects
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85997
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 93
Number of Exceedances: 8
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Eight of the 93 samples exceeded the hardness adjusted criteria.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. If no hardness data were available, a value of 100 mg/L was used.
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The River was sampled between Figueroa St. and Riverside Dr.
Temporal Representation: One sample was collected in 2007, two samples was collected in 2008, three samples were collected in 2009, and one sample was collected in 2010.
Environmental Conditions: There was no special environmental condition reported.
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.los angeles river
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 66229, Benthic Community Effects
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 28079
 
Pollutant: Trash
LOE Subgroup: Narrative Description Data
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: A TMDL has been approved for this water segment-pollutant combination. The Trash TMDL for the Los Angeles River Watershed was adopted by the Los Angeles RWQCB on August 09, 2007 and subsequently approved by USEPA. The TMDL was been integrated into the Basin Plan as Attachment A of Regional Board Resolution No. 2007-012.
Data Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
SWAMP Data: Non-SWAMP
 
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):
 
Line of Evidence (LOE) for Decision ID 66229, Benthic Community Effects
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 86019
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 51
Number of Exceedances: 13
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: 13 out of 51 monthly averages exceeded the site specific basin plan objective for total ammonia as nitrogen. All exceedences occurred 2007 and prior.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: he Los Angeles Regional Water Quality Control Plan objective for ammonia is a function of pH, temperature, and the presence of early life stages. Site specific objectives for this waterbody are based upon the presence of early life stages and found in Table 3-4. "Site-Specific 30-day Average Objectives for Ammonia by Waterbody Reach." Site specific objectives are applied as if early life stages are absent (dates ranging October 1 to March 31).
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected in three locations: LAG R4, LAG R5, and LAG R7.
Temporal Representation: Samples were collected weekly from 07/2005 through 06/2010. Only samples collected from the months of October 1 to March 31 have been included.
Environmental Conditions:
QAPP Information: All samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 66229, Benthic Community Effects
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 2511
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Unspecified--This LOE is a placeholder to support a listing decision made by USEPA for 2006.
Data Reference: Placeholder reference 2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion:
Objective/Criterion Reference:
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation:
Temporal Representation:
Environmental Conditions:
QAPP Information: QA Info Missing
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 66229, Benthic Community Effects
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 2504
 
Pollutant: Nutrients (Algae)
LOE Subgroup: Pollutant-Water
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Data Reference: Placeholder reference 2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion:
Objective/Criterion Reference:
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation:
Temporal Representation:
Environmental Conditions:
QAPP Information: QA Info Missing
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 66229, Benthic Community Effects
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 2507
 
Pollutant: Ammonia
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Data Reference: Placeholder reference 2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion:
Objective/Criterion Reference:
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation:
Temporal Representation:
Environmental Conditions:
QAPP Information: QA Info Missing
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 66229, Benthic Community Effects
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 2508
 
Pollutant: Trash
LOE Subgroup: Narrative Description Data
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: The Los Angeles River Trash TMDL was completed by the Regional Board on September 19, 2001 (USEPA, 2002) to address impairments caused by trash. However, on July 19, 2006 the State Board rescinded approval of this TMDL and remanded it back to the Regional Board based on court ruling City of Arcadia v. State Water Resources Control Board (D043877).
Data Reference: Placeholder reference 2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion:
Objective/Criterion Reference:
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation:
Temporal Representation:
Environmental Conditions:
QAPP Information: QA Info Missing
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 66229, Benthic Community Effects
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 2510
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Unspecified--This LOE is a placeholder to support a listing decision made by USEPA for 2006.
Data Reference: Placeholder reference 2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion:
Objective/Criterion Reference:
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation:
Temporal Representation:
Environmental Conditions:
QAPP Information: QA Info Missing
QAPP Information Reference(s):
 
 
DECISION ID
64368
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Cadmium
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 95 samples exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 95 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
 
Line of Evidence (LOE) for Decision ID 64368, Cadmium
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85995
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 95
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: All of the samples were below criteria. (Total recoverable cadmium was analyzed for.)
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: The California Toxics Rule (USEPA), 4-day avg., dissolved, is 2.2 ug/L.
Guideline Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Spatial Representation: The River was sampled between Figueroa St. and Riverside Dr.
Temporal Representation: One sample was collected in 2007, two samples was collected in 2008, three samples were collected in 2009, and one sample was collected in 2010.
Environmental Conditions: There was no special environmental condition reported.
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.los angeles river
QAPP Information Reference(s):
 
 
DECISION ID
64359
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Chlordane
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence are necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 0 sample exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 0 sample exceeded the CRITERIA and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to SECTION 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
 
Line of Evidence (LOE) for Decision ID 64359, Chlordane
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85996
 
Pollutant: Chlordane
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: All of the samples were below the reporting limit, which was above criteria. Therefore, non of the samples can be used with confidence.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: The CTR CCC for Chlordane is 0.0043 ug/L.
Guideline Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Spatial Representation: The River was sampled between Figueroa St. and Riverside Dr.
Temporal Representation: One sample was collected in 2007, two samples was collected in 2008, three samples were collected in 2009, and one sample was collected in 2010.
Environmental Conditions: There was no special environmental condition reported.
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.los angeles river
QAPP Information Reference(s):
 
 
DECISION ID
64369
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Cyanide
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
1 of 95 samples exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 1 of 95 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
 
Line of Evidence (LOE) for Decision ID 64369, Cyanide
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85998
 
Pollutant: Cyanide
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 95
Number of Exceedances: 1
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: One of the ninty-five samples exceeded the evaluation guideline.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) for cyanide of 5.2 ug/L to protect aquatic life in freshwater.
Guideline Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Spatial Representation: The River was sampled between Figueroa St. and Riverside Dr.
Temporal Representation: One sample was collected in 2007, two samples was collected in 2008, three samples were collected in 2009, and one sample was collected in 2010.
Environmental Conditions: There was no special environmental condition reported.
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.los angeles river
QAPP Information Reference(s):
 
 
DECISION ID
64372
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: DDD (Dichlorodiphenyldichloroethane)
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 23 samples exceed the GUIDELINE.

Based on the readily available data and information, the weight of evidence indicates that there is INSUFFICIENT justification FOR placing this water segment-pollutant combination on the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 23 samples exceed the GUIDELINE and this sample size is INSUFFICIENT to determine beneficial use support, with the power and confidence of the Listing Policy. There is not an associated sediment toxicity data as required by Section 3.6 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
 
Line of Evidence (LOE) for Decision ID 64372, DDD (Dichlorodiphenyldichloroethane)
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85999
 
Pollutant: DDD (Dichlorodiphenyldichloroethane)
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 23
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: None of the twenty three samples exceeded the evaluation guideline.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for sum of DDD is 28.0 ug/Kg dry weight.
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: Sediment samples were collected at station LA River R4, LA River R5 and LA River R7.
Temporal Representation: Samples were collected in 2006 on February 7 and August 2, and in 2007 on February 7.
Environmental Conditions:
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.
QAPP Information Reference(s):
 
 
DECISION ID
64373
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: DDE (Dichlorodiphenyldichloroethylene)
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 23 samples exceed the GUIDELINE.

Based on the readily available data and information, the weight of evidence indicates that there is INSUFFICIENT justification FOR placing this water segment-pollutant combination on the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 23 samples exceed the GUIDELINE and this sample size is INSUFFICIENT to determine beneficial use support, with the power and confidence of the Listing Policy. There is not an associated sediment toxicity data as required by Section 3.6 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
 
Line of Evidence (LOE) for Decision ID 64373, DDE (Dichlorodiphenyldichloroethylene)
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 86000
 
Pollutant: DDE (Dichlorodiphenyldichloroethylene)
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 23
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: None of the twenty three samples exceeded the evaluation guideline.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for sum of DDE is 31.3 ug/Kg dry weight.
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: Sediment samples were collected at station LA River R4, LA River R5 and LA River R7.
Temporal Representation: Samples were collected in 2006 on February 7 and August 2, and in 2007 on February 7.
Environmental Conditions:
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.
QAPP Information Reference(s):
 
 
DECISION ID
64381
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: DDT (Dichlorodiphenyltrichloroethane)
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 23 samples exceed the GUIDELINE.

Based on the readily available data and information, the weight of evidence indicates that there is INSUFFICIENT justification FOR placing this water segment-pollutant combination on the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 23 samples exceed the GUIDELINE and this sample size is INSUFFICIENT to determine beneficial use support, with the power and confidence of the Listing Policy. There is not an associated sediment toxicity data as required by Section 3.6 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
 
Line of Evidence (LOE) for Decision ID 64381, DDT (Dichlorodiphenyltrichloroethane)
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 86001
 
Pollutant: DDT (Dichlorodiphenyltrichloroethane)
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 23
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: None of the twenty three samples exceeded the evaluation guideline.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for sum of DDT is 62.9 ug/Kg dry weight.
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: Sediment samples were collected at station LA River R4, LA River R5 and LA River R7.
Temporal Representation: Samples were collected in 2006 on February 7 and August 2, and in 2007 on February 7.
Environmental Conditions:
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.
QAPP Information Reference(s):
 
 
DECISION ID
64378
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Dieldrin
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 24 samples exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 24 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
 
Line of Evidence (LOE) for Decision ID 64378, Dieldrin
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 86002
 
Pollutant: Dieldrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: All of the samples were below criteria.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: The California Toxics Rule (USEPA), 4-day avg., is 0.056 ug/L.
Guideline 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
 
Spatial Representation: The River was sampled between Figueroa St. and Riverside Dr.
Temporal Representation: One sample was collected in 2007, two samples was collected in 2008, three samples were collected in 2009, and one sample was collected in 2010.
Environmental Conditions: There was no special environmental condition reported.
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.los angeles river
QAPP Information Reference(s):
 
 
DECISION ID
64374
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Endosulfan
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 23 samples exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 23 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
 
Line of Evidence (LOE) for Decision ID 64374, Endosulfan
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 86003
 
Pollutant: Endosulfan
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 23
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 23 samples exceeded the water quality criteria/objective.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: Toxic Rule criteria fresh aquatic life protection continuous concentration (4-day average)is 0.056 ug/L.
Guideline Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Spatial Representation: A total of 23 samples were collected at sampling locations, LA RIVER R-4 (9 samples), LA River R-5 (5 samples) and LA River R-7 (9 samples).
Temporal Representation: 23 samples from 2006 - 2010 were collected. At LA RIVER R-4, two samples in 2006, two samples in 2007, two samples in 2008, two samples in 2009, and one sample in 2010 were collected. At LA River R-5, two samples in 2006, two samples in 2007, and one sample in 2008 were collected. LA River R-7 two samples in 2007, two samples in 2008, two samples in 2009, and one sample in 2010 were collected.
Environmental Conditions: There was no special environmental conditions reported.
QAPP Information: ENVIRONMENTAL MONITORING DIVISION (EMD) BUREAU OF ENVIRONMENTAL MONITORING DIVISION (EMD) BUREAU OF SANITATION DEPARTMENT OF PUBLIC WORKS CITY OF LOS ANGELES submitted QUALITY ASSURANCE MANUAL (QA) dated December 2009. The Quality Assurance Manual documents the QA Program
QAPP Information Reference(s):
 
 
DECISION ID
64375
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Endrin
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 23 samples exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 23 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
 
Line of Evidence (LOE) for Decision ID 64375, Endrin
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 86004
 
Pollutant: Endrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 23
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 23 samples exceeded the water quality criteria/objective.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: California Toxic Rule criteria fresh aquatic life protection continuous concentration (4-day average)is 0.036 ug/L.
Guideline Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Spatial Representation: A total of 23 samples were collected at sampling locations, LA RIVER R-4 (9 samples), LA River R-5 (5 samples) and LA River R-7 (9 samples).
Temporal Representation: 23 samples from 2006 - 2010 were collected. At LA RIVER R-4, two samples in 2006, two samples in 2007, two samples in 2008, two samples in 2009, and one sample in 2010 were collected. At LA River R-5, two samples in 2006, two samples in 2007, and one sample in 2008 were collected. LA River R-7 two samples in 2007, two samples in 2008, two samples in 2009, and one sample in 2010 were collected.
Environmental Conditions: There was no special environmental conditions reported.
QAPP Information: ENVIRONMENTAL MONITORING DIVISION (EMD) BUREAU OF ENVIRONMENTAL MONITORING DIVISION (EMD) BUREAU OF SANITATION DEPARTMENT OF PUBLIC WORKS CITY OF LOS ANGELES submitted QUALITY ASSURANCE MANUAL (QA) dated December 2009. The Quality Assurance Manual documents the QA Program
QAPP Information Reference(s):
 
 
DECISION ID
64363
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Heptachlor
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence are necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 0 sample exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 0 sample exceeded the CRITERIA and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to SECTION 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
 
Line of Evidence (LOE) for Decision ID 64363, Heptachlor
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 86007
 
Pollutant: Heptachlor
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: The reporting limit for the non-detect sample was 0.01 ug/L which is equal to the water quality objective, therefore these data are not of sufficient resolution to determine if water quality standards are being achieved.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Region 4 Basin Plan objective is "No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses."
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: California Toxic Rule criteria fresh aquatic life protection continuous concentration (4-day average)is 0.0038 ug/L.
Guideline Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Spatial Representation: A total of 23 samples were collected at sampling locations, LA RIVER R-4 (9 samples), LA River R-5 (5 samples) and LA River R-7 (9 samples).
Temporal Representation: 23 samples from 2006 - 2010 were collected. At LA RIVER R-4, two samples in 2006, two samples in 2007, two samples in 2008, two samples in 2009, and one sample in 2010 were collected. At LA River R-5, two samples in 2006, two samples in 2007, and one sample in 2008 were collected. LA River R-7 two samples in 2007, two samples in 2008, two samples in 2009, and one sample in 2010 were collected.
Environmental Conditions: There was no special environmental conditions reported.
QAPP Information: ENVIRONMENTAL MONITORING DIVISION (EMD) BUREAU OF ENVIRONMENTAL MONITORING DIVISION (EMD) BUREAU OF SANITATION DEPARTMENT OF PUBLIC WORKS CITY OF LOS ANGELES submitted QUALITY ASSURANCE MANUAL (QA) dated December 2009. The Quality Assurance Manual documents the QA Program
QAPP Information Reference(s):
 
 
DECISION ID
64361
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Heptachlor epoxide
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence are necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 0 sample exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 0 sample exceeded the CRITERIA and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to SECTION 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
 
Line of Evidence (LOE) for Decision ID 64361, Heptachlor epoxide
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 86009
 
Pollutant: Heptachlor epoxide
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: The reporting limit for the non-detect sample was 0.01 ug/L which is equal to the water quality objective, therefore these data are not of sufficient resolution to determine if water quality standards are being achieved.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Region 4 Basin Plan objective is "No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: California Toxic Rule criteria fresh aquatic life protection continuous concentration (4-day average)is 0.0038 ug/L.
Guideline Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Spatial Representation: A total of 23 samples were collected at sampling locations, LA RIVER R-4 (9 samples), LA River R-5 (5 samples) and LA River R-7 (9 samples).
Temporal Representation: 23 samples from 2006 - 2010 were collected. At LA RIVER R-4, two samples in 2006, two samples in 2007, two samples in 2008, two samples in 2009, and one sample in 2010 were collected. At LA River R-5, two samples in 2006, two samples in 2007, and one sample in 2008 were collected. LA River R-7 two samples in 2007, two samples in 2008, two samples in 2009, and one sample in 2010 were collected.
Environmental Conditions: There was no special environmental conditions reported.
QAPP Information: ENVIRONMENTAL MONITORING DIVISION (EMD) BUREAU OF ENVIRONMENTAL MONITORING DIVISION (EMD) BUREAU OF SANITATION DEPARTMENT OF PUBLIC WORKS CITY OF LOS ANGELES submitted QUALITY ASSURANCE MANUAL (QA) dated December 2009. The Quality Assurance Manual documents the QA Program
QAPP Information Reference(s):
 
 
DECISION ID
64370
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Mercury
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 95 samples exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 95 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
 
Line of Evidence (LOE) for Decision ID 64370, Mercury
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 86011
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 95
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: None of the 95 samples exceeded the evaluation guideline.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to elemental mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
 
Spatial Representation: The River was sampled between Figueroa St. and Riverside Dr.
Temporal Representation: One sample was collected in 2007, two samples was collected in 2008, three samples were collected in 2009, and one sample was collected in 2010.
Environmental Conditions: There was no special environmental condition reported.
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.los angeles river
QAPP Information Reference(s):
 
 
DECISION ID
64376
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Methoxychlor
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 23 samples exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 23 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
 
Line of Evidence (LOE) for Decision ID 64376, Methoxychlor
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 86012
 
Pollutant: Methoxychlor
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 23
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 23 samples exceeded the water quality criteria/objective.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Los Angeles Region Basin Plan states "No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses"
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: The USEPA Nationally Recommended Criteria for fresh aquatic life protection continuous concentration (4-day average)is 0.03 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
 
Spatial Representation: A total of 23 samples were collected at sampling locations, LA RIVER R-4 (9 samples), LA River R-5 (5 samples) and LA River R-7 (9 samples).
Temporal Representation: 23 samples from 2006 - 2010 were collected. At LA RIVER R-4, two samples in 2006, two samples in 2007, two samples in 2008, two samples in 2009, and one sample in 2010 were collected. At LA River R-5, two samples in 2006, two samples in 2007, and one sample in 2008 were collected. LA River R-7 two samples in 2007, two samples in 2008, two samples in 2009, and one sample in 2010 were collected.
Environmental Conditions: There was no special environmental conditions reported.
QAPP Information: ENVIRONMENTAL MONITORING DIVISION (EMD) BUREAU OF ENVIRONMENTAL MONITORING DIVISION (EMD) BUREAU OF SANITATION DEPARTMENT OF PUBLIC WORKS CITY OF LOS ANGELES submitted QUALITY ASSURANCE MANUAL (QA) dated December 2009. The Quality Assurance Manual documents the QA Program
QAPP Information Reference(s):
 
 
DECISION ID
64377
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Mirex
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 23 samples exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 23 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
 
Line of Evidence (LOE) for Decision ID 64377, Mirex
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 86016
 
Pollutant: Mirex
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 23
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 23 samples exceeded the water quality criteria/objective.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: California Toxic Rule criteria fresh aquatic life protection maximum concentration (instantaneous) is 0.001 ug/L.
Guideline Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Spatial Representation: A total of 23 samples were collected at sampling locations, LA RIVER R-4 (9 samples), LA River R-5 (5 samples) and LA River R-7 (9 samples).
Temporal Representation: 23 samples from 2006 - 2010 were collected. At LA RIVER R-4, two samples in 2006, two samples in 2007, two samples in 2008, two samples in 2009, and one sample in 2010 were collected. At LA River R-5, two samples in 2006, two samples in 2007, and one sample in 2008 were collected. LA River R-7 two samples in 2007, two samples in 2008, two samples in 2009, and one sample in 2010 were collected.
Environmental Conditions: There was no special environmental conditions reported.
QAPP Information: ENVIRONMENTAL MONITORING DIVISION (EMD) BUREAU OF ENVIRONMENTAL MONITORING DIVISION (EMD) BUREAU OF SANITATION DEPARTMENT OF PUBLIC WORKS CITY OF LOS ANGELES submitted QUALITY ASSURANCE MANUAL (QA) dated December 2009. The Quality Assurance Manual documents the QA Program
QAPP Information Reference(s):
 
 
DECISION ID
64379
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Nickel
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 46 samples exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 46 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
 
Line of Evidence (LOE) for Decision ID 64379, Nickel
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 86017
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 46
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: None of the 46 samples exceeded the hardness adjusted criteria.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. If no hardness data were available, a value of 100 mg/L was used.
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The River was sampled between Figueroa St. and Riverside Dr.
Temporal Representation: One sample was collected in 2007, two samples was collected in 2008, three samples were collected in 2009, and one sample was collected in 2010.
Environmental Conditions: There was no special environmental condition reported.
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.los angeles river
QAPP Information Reference(s):
 
 
DECISION ID
64380
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 398 samples exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 398 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
 
Line of Evidence (LOE) for Decision ID 64380, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 86018
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 398
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: 0 of the 398 samples exceeded the objective for nitrate + nitrite. Sampling data for nitrate and nitrite were summed to determine whether sampling data met the water quality objectives.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Water Quality Control Plan for the Los Angeles Region site specific objective for Nitrogen (Nitrate + Nitrite as N) in the Los Angeles River Reach 3 is 8 mg/L. From table 3-8 titled "Water Quality Objectives for Selected Constituents in Inland Surface Waters".
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected in three locations: LAG R4, LAG R5, and LAG R7.
Temporal Representation: Samples were collected weekly from 07/2005 through 06/2010.
Environmental Conditions:
QAPP Information: All samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.
QAPP Information Reference(s):
 
 
DECISION ID
64385
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Oxygen, Dissolved
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
3 of 542 samples exceeded the OBJECTIVE.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 3 of 542 samples exceeded the OBJECTIVE and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
 
Line of Evidence (LOE) for Decision ID 64385, Oxygen, Dissolved
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85895
 
Pollutant: Oxygen, Dissolved
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 542
Number of Exceedances: 3
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Numeric data generated from 542 averages of Dissolved Oxygen concentration had 3 exceedences.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Dissolved Oxygen Water Quality Objective of all surface waters designated as Warm Fresh Water Aquatic Habitat shall not be depressed below 5mg/l.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected from the R-4, R-5, and R-7 monitoring locations.
Temporal Representation: Samples were collected approximately once a week from July 2005 to June 2010.
Environmental Conditions:
QAPP Information: The quality assurance manual for the Environmental Monitoring Division Bureau of Sanitation, Department of Public Works, City of Los Angeles was provided. Toxicity testing methods and requirements are in the NPDES permit CA0056227.
QAPP Information Reference(s):
 
 
DECISION ID
64427
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: PCBs (Polychlorinated biphenyls)
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

2 lines of evidence are available in the administrative record to assess this pollutant.
0 of 23 samples exceeded the CRITERIA.
0 of 23 samples exceeded the CRITERIA.
0 of 0 samples exceeded the CRITERIA.
0 of 0 samples exceeded the CRITERIA.
0 of 23 samples exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 23, 0 of 23, 0 of 0, 0 of 0 and 0 of 23 samples exceeded the CRITERIA and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to SECTION 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
 
Line of Evidence (LOE) for Decision ID 64427, PCBs (Polychlorinated biphenyls)
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85912
 
Pollutant: PCBs (Polychlorinated biphenyls)
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 23
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: None of the twenty three samples exceeded the evaluation guideline.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for total PCBs is 676 ug/Kg dry weight.
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: Sediment samples were collected at station LA River R4, LA River R5 and LA River R7.
Temporal Representation: Samples were collected in 2006 on February 7 and August 2, and in 2007 on February 7.
Environmental Conditions:
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 64427, PCBs (Polychlorinated biphenyls)
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85911
 
Pollutant: PCB (Polychlorinated biphenyl)-1260
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: The reporting limits for all 23 of the non-detect samples were greater than the criteria, therefore were not used in this assessment.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: The CTR for freshwater habitat, continuous concentration, is 0.014 ug/L for total PCBs.
Guideline Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Spatial Representation: The River was sampled between Figueroa St. and Riverside Dr.
Temporal Representation: One sample was collected in 2007, two samples was collected in 2008, three samples were collected in 2009, and one sample was collected in 2010.
Environmental Conditions: There was no special environmental condition reported.
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.los angeles river
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 64427, PCBs (Polychlorinated biphenyls)
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85898
 
Pollutant: PCB (Polychlorinated biphenyl)-1254
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: The reporting limits for all 23 of the non-detect samples were greater than the criteria, therefore were not used in this assessment.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: The CTR for freshwater habitat, continuous concentration, is 0.014 ug/L for total PCBs.
Guideline Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Spatial Representation: The River was sampled between Figueroa St. and Riverside Dr.
Temporal Representation: One sample was collected in 2007, two samples was collected in 2008, three samples were collected in 2009, and one sample was collected in 2010.
Environmental Conditions: There was no special environmental condition reported.
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.los angeles river
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 64427, PCBs (Polychlorinated biphenyls)
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85896
 
Pollutant: PCB (Polychlorinated biphenyl)-1242
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 23
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: The reporting limits for all 23 of the non-detect samples were greater than the criteria, therefore were not used in this assessment.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: The CTR for freshwater habitat, continuous concentration, is 0.014 ug/L for total PCBs.
Guideline Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Spatial Representation: The River was sampled between Figueroa St. and Riverside Dr.
Temporal Representation: One sample was collected in 2007, two samples was collected in 2008, three samples were collected in 2009, and one sample was collected in 2010.
Environmental Conditions: There was no special environmental condition reported.
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.los angeles river
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 64427, PCBs (Polychlorinated biphenyls)
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85897
 
Pollutant: PCB (Polychlorinated biphenyl)-1248
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 23
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: The reporting limits for all 23 of the non-detect samples were greater than the criteria, therefore were not used in this assessment.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: The CTR for freshwater habitat, continuous concentration, is 0.014 ug/L for total PCBs.
Guideline Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Spatial Representation: The River was sampled between Figueroa St. and Riverside Dr.
Temporal Representation: One sample was collected in 2007, two samples was collected in 2008, three samples were collected in 2009, and one sample was collected in 2010.
Environmental Conditions: There was no special environmental condition reported.
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.los angeles river
QAPP Information Reference(s):
 
 
DECISION ID
64360
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Pentachlorophenol (PCP)
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence are necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 0 sample exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 0 sample exceeded the CRITERIA and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to SECTION 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
 
Line of Evidence (LOE) for Decision ID 64360, Pentachlorophenol (PCP)
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85913
 
Pollutant: Pentachlorophenol (PCP)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: The reporting limits for all 23 of the non-detect samples were greater than the criteria, therefore were not used in this assessment.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Surface waters shall not contain concentrations of chemical constituents in amounts that adversely affect any designated beneficial use.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: The California Toxic Rule, 4-day avg. at pH 6.5 is 4 ug/L.
Guideline Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Spatial Representation: The River was sampled between Figueroa St. and Riverside Dr.
Temporal Representation: One sample was collected in 2007, two samples was collected in 2008, three samples were collected in 2009, and one sample was collected in 2010.
Environmental Conditions: There was no special environmental condition reported.
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.los angeles river
QAPP Information Reference(s):
 
 
DECISION ID
64382
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Selenium
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 31 samples exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 31 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
 
Line of Evidence (LOE) for Decision ID 64382, Selenium
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85915
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 31
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: None of the 31 samples exceeded the criteria.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The CTR for selenium is 5.0 ug/L.
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The River was sampled between Figueroa St. and Riverside Dr.
Temporal Representation: One sample was collected in 2007, two samples was collected in 2008, three samples were collected in 2009, and one sample was collected in 2010.
Environmental Conditions: There was no special environmental condition reported.
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.los angeles river
QAPP Information Reference(s):
 
 
DECISION ID
64383
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Silver
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 31 samples exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 31 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
 
Line of Evidence (LOE) for Decision ID 64383, Silver
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85932
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 31
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: None of the 31 samples exceeded the hardness adjusted criteria.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations for silver to protect aquatic life in freshwater (1-hour average). The silver criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. If no hardness data were available, a value of 100 mg/L was used.
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The River was sampled between Figueroa St. and Riverside Dr.
Temporal Representation: One sample was collected in 2007, two samples was collected in 2008, three samples were collected in 2009, and one sample was collected in 2010.
Environmental Conditions: There was no special environmental condition reported.
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.los angeles river
QAPP Information Reference(s):
 
 
DECISION ID
64386
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Temperature, water
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 235 samples exceeded the OBJECTIVE.

Based on the readily available data and information, the weight of evidence indicates that there is not sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 235 samples exceeded the OBJECTIVE and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
 
Line of Evidence (LOE) for Decision ID 64386, Temperature, water
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85933
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 235
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: 0 of the 235 samples exceeded the evaluation guideline for water temperature.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: For waters designated as WARM, water temperature shall not be altered more than 5 degrees F above the natural temperature. At no time shall these WARM designated waters be raised above 80 degrees F as a result of waste discharges.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: At no time shall these WARM designated waters be raised above 80 degrees F
Guideline Reference: Fish introductions in CA: History and impact on native fishes. Davis, CA: University of CA, Davis
 
Spatial Representation: Samples were collected at three locations in Reach 3 of the Los Angeles River: Site 1: Lat. 34.1377167 Lon. -118.2753667, Site 2: Lat. 34.1348333 Lon. -118.2745333, Site 3: Lat. 34.1228333 Lon. -118.2704500
Temporal Representation: Samples collected between July 2005 and June 2010.
Environmental Conditions:
QAPP Information: QUALITY ASSURANCE MANUAL Prepared for The Analysts, Supervisors, and Managers of the Environmental Monitoring Division ENVIRONMENTAL MONITORING DIVISION BUREAU OF SANITATION DEPARTMENT OF PUBLIC WORKS CITY OF LOS ANGELES, December 2009
QAPP Information Reference(s):
 
 
DECISION ID
64362
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Toxaphene
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence are necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 0 sample exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 0 sample exceeded the CRITERIA and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to SECTION 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
 
Line of Evidence (LOE) for Decision ID 64362, Toxaphene
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85935
 
Pollutant: Toxaphene
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Since the criteria is smaller than the reporting limit and method detection limit, none of samples can be counted.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Los Angeles Region Basin Plan objective is "No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses."
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: Criteria Continuous Concentration (4-day Average) is 0.0002 ug/L
Guideline Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Spatial Representation: A total of 23 samples were collected at sampling locations, LA RIVER R-4 (9 samples), LA River R-5 (5 samples) and LA River R-7 (9 samples).
Temporal Representation: 23 samples from 2006 - 2010 were collected. At LA RIVER R-4, two samples in 2006, two samples in 2007, two samples in 2008, two samples in 2009, and one sample in 2010 were collected. At LA River R-5, two samples in 2006, two samples in 2007, and one sample in 2008 were collected. LA River R-7 two samples in 2007, two samples in 2008, two samples in 2009, and one sample in 2010 were collected.
Environmental Conditions: There was no special environmental conditions reported.
QAPP Information: ENVIRONMENTAL MONITORING DIVISION (EMD) BUREAU OF ENVIRONMENTAL MONITORING DIVISION (EMD) BUREAU OF SANITATION DEPARTMENT OF PUBLIC WORKS CITY OF LOS ANGELES submitted QUALITY ASSURANCE MANUAL (QA) dated December 2009. The Quality Assurance Manual documents the QA Program
QAPP Information Reference(s):
 
 
DECISION ID
64371
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Zinc
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 93 samples exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 0 of 93 samples exceeded the CRITERIA and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
 
Line of Evidence (LOE) for Decision ID 64371, Zinc
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85953
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 93
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: None of the 93 samples exceeded the hardness adjusted criteria.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. If no hardness data were available, a value of 100 mg/L was used.
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The River was sampled between Figueroa St. and Riverside Dr.
Temporal Representation: One sample was collected in 2007, two samples was collected in 2008, three samples were collected in 2009, and one sample was collected in 2010.
Environmental Conditions: There was no special environmental condition reported.
QAPP Information: The samples were collected by the Environmental Monitoring Division of the City of Los Angeles using a quality assurance program for all laboratory analysis. These laboratories are individually certified by the Environmental Laboratory Accreditation Program (ELAP) of the California Department of Health Services.los angeles river
QAPP Information Reference(s):
 
 
DECISION ID
64384
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: pH
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
7 of 542 samples exceeded the OBJECTIVE.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 7 of 542 samples exceeded the OBJECTIVE and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
 
Line of Evidence (LOE) for Decision ID 64384, pH
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85914
 
Pollutant: pH
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 542
Number of Exceedances: 7
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Seven of the 542 samples exceeded the objective.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The pH of all inland surface waters shall not be depressed below 6.5 or raised above 8.5 as a result of waste discharges.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected from the R-4, R-5, and R-7 monitoring locations.
Temporal Representation: Samples were collected approximately once a week from July 2005 to June 2010.
Environmental Conditions:
QAPP Information: The quality assurance manual for the Environmental Monitoring Division Bureau of Sanitation, Department of Public Works, City of Los Angeles was provided. Toxicity testing methods and requirements are in the NPDES permit CA0056227.
QAPP Information Reference(s):
 
 
DECISION ID
64389
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Toxicity
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: 2027
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 a single line of evidence is necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
29 of 75 samples exceeded the GUIDELINE.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 29 of 75 samples exceeded the GUIDELINE and this exceeds the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
 
 
Line of Evidence (LOE) for Decision ID 64389, Toxicity
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 85936
 
Pollutant: Toxicity
LOE Subgroup: Toxicity
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 75
Number of Exceedances: 29
 
Data and Information Type: TOXICITY TESTING
Data Used to Assess Water Quality: Seventy-five samples were collected to evaluate water toxicity. Twenty-nine of the 75 samples exhibited significant toxicity. The toxicity tests included acute toxicity using Atherinops affinis and chronic toxicity using Ceriodaphnia dubia, Selenastrum capricornutum and Pimephales promelas.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. The t-test is used to determine if there is a statistically significant decrease in organism response in the sample as compared to the control.
Guideline Reference: Short-term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms. Fourth Edition. Office of Water, U.S. Environmental Protection Agency. Washington, D.C. EPA-821-R-02-013
 
Spatial Representation: The samples were collected at Los Angeles River R4, R5 and R7.
Temporal Representation: The samples were collected every three months from November 2005 to May 2010.
Environmental Conditions:
QAPP Information: The quality assurance manual for the Environmental Monitoring Division Bureau of Sanitation, Department of Public Works, City of Los Angeles was provided. Toxicity testing methods and requirements are in the NPDES permit CA0053953.
QAPP Information Reference(s):
 
 
DECISION ID
65099
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Indicator Bacteria
Final Listing Decision: List on 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Sources: Source Unknown
TMDL Name: Los Angeles River Pathogens (15)
TMDL Project Code: 238
Date TMDL Approved by USEPA: 03/23/2012
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.3 of the Listing Policy. Under section 3.3 a single line of evidence is necessary to assess listing status.

2 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 CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 237 of 247 and 202 of 330 samples exceeded the OBJECTIVE and this exceeds the allowable frequency listed in Table 3.2 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

There is sufficient justification to place this waterbody/pollutant in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by USEPA, and is expected to result in attainment of the standard.

This conclusion is based on the staff findings that:
1. The Los Angeles River Bacteria TMDL was approved by USEPA on 03/23/2012.
 
Regional Board Staff Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
 
 
Line of Evidence (LOE) for Decision ID 65099, Indicator Bacteria
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 86005
 
Pollutant: Escherichia coli (E. coli)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 330
Number of Exceedances: 202
 
Data and Information Type: TOXICITY TESTING
Data Used to Assess Water Quality: Two hundred and two of the the 330 samples exceeded the E. coli objective.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The E. coli density shall not exceed 235/100 ml. (Water Quality Control Plan for the Los Angeles Region).
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline:
Guideline Reference: Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002
 
Spatial Representation: The samples were collected at Los Angeles River R4, R5 and R7.
Temporal Representation: The samples were collected once a week from 2006 to May 2010.
Environmental Conditions:
QAPP Information: The quality assurance manual for the Environmental Monitoring Division Bureau of Sanitation, Department of Public Works, City of Los Angeles was provided. Los Angeles-Glendale Water Reclamation Plant NPDES permit no. CA0053953
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 65099, Indicator Bacteria
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 86006
 
Pollutant: Escherichia coli (E. coli)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 247
Number of Exceedances: 237
 
Data and Information Type: TOXICITY TESTING
Data Used to Assess Water Quality: Two hundred and thirty-seven of the the 247 geometric means exceeded the E. coli objective.
Data Reference: Data from Los Angeles-Glendale Water Reclamation Plant NPDES Permit no. CA0053953, Jul. 2005-Jun. 2010
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The E. coli density shall not exceed 126/100 ml. (Water Quality Control Plan for the Los Angeles Region).
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline:
Guideline Reference: Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002
 
Spatial Representation: The samples were collected at Los Angeles River R4, R5 and R7.
Temporal Representation: The samples were collected once a week from 2006 to May 2010.
Environmental Conditions:
QAPP Information: The quality assurance manual for the Environmental Monitoring Division Bureau of Sanitation, Department of Public Works, City of Los Angeles was provided. Los Angeles-Glendale Water Reclamation Plant NPDES permit no. CA0053953
QAPP Information Reference(s):
 
 
DECISION ID
37361
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Scum/Foam-unnatural
Final Listing Decision: Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Delist from 303(d) list (TMDL required list)(2012)
Revision Status Original
Reason for Delisting: Other
Impairment from Pollutant or Pollution: Pollution
 
Regional Board Staff Conclusion: This pollutant is being considered for removal from the section 303(d) list under section 4 of the Listing Policy. Under this section of the Policy, a minimum of one line of evidence is needed to assess listing status.

One line of evidence is available in the administrative record to assess this water body condition. A nitrogen TMDL has been developed and approved by USEPA and an approved implementation plan is expected to result in attainment of the nitrogen standard. Qualitative information on scum/foam-unnatural alone is not sufficient to support placement on the section 303(d) list (Listing Policy section 3.7). It is expected that this TMDL will address the pollutant(s) contributing to or causing these conditions. The Los Angeles River Nitrogen TMDL was approved by RWQCB on August 19, 2003 and subsequently approved by USEPA on March 18, 2004. This TMDL will address this water body condition.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of removing this water segment-pollutant combination from the section 303(d) list.
 
Regional Board Staff Decision Recommendation: This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed.
 
 
Line of Evidence (LOE) for Decision ID 37361, Scum/Foam-unnatural
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 2506
 
Pollutant: Scum/Foam-unnatural
LOE Subgroup: Narrative Description Data
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: A TMDL and implementation plan has been approved for this water segment-pollutant combination. The Los Angeles River Nitrogen TMDL was approved by RWQCB on August 19, 2003 and subsequently approved by USEPA on March 18, 2004. This TMDL will address this water body condition.
Data Reference: Placeholder reference 2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion:
Objective/Criterion Reference:
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation:
Temporal Representation:
Environmental Conditions:
QAPP Information: QA Info Missing
QAPP Information Reference(s):
 
 
DECISION ID
34556
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Taste and odor
Final Listing Decision: Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Delist from 303(d) list (TMDL required list)(2012)
Revision Status Original
Reason for Delisting: Flaws in original listing
Impairment from Pollutant or Pollution: Pollution
 
Regional Board Staff Conclusion: This pollutant is being considered for removal from the section 303(d) list under section 4 of the Listing Policy. Under this section of the Policy, a minimum of one line of evidence is needed to assess listing status.

One line of evidence is available in the administrative record to assess this water body condition. A nitrogen TMDL has been developed and approved by USEPA and an approved implementation plan is expected to result in attainment of the nitrogen standard. Qualitative information on taste and odor alone is not sufficient to support placement on the section 303(d) list (Listing Policy section 3.7). It is expected that this TMDL will address the pollutant(s) contributing to or causing this condition.

The Los Angeles River Nitrogen TMDL was approved by RWQCB on August 19, 2003 and subsequently approved by USEPA on March 18, 2004.
 
Regional Board Staff Decision Recommendation: This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed.
 
 
Line of Evidence (LOE) for Decision ID 34556, Taste and odor
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 2505
 
Pollutant: Taste and odor
LOE Subgroup: Pollutant-Water
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
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 2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion:
Objective/Criterion Reference:
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation:
Temporal Representation:
Environmental Conditions:
QAPP Information: QA Info Missing
QAPP Information Reference(s):
 
 
DECISION ID
34204
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Nutrients (Algae)
Final Listing Decision: List on 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (being addressed by USEPA approved TMDL)(2012)
Revision Status Original
Sources: Nonpoint Source | Point Source
TMDL Name: Los Angeles River Nitrogen (11)
TMDL Project Code: 229
Date TMDL Approved by USEPA: 03/18/2004
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for listing under section 2.2 of the Listing Policy. Under this section of the Policy, a minimum of one line of evidence is needed to assess listing status.

One line of evidence is available in the administrative record to assess this pollutant. A TMDL has been developed and approved by USEPA and an approved implementation plan is expected to result in attainment of the standard. The Los Angeles River Nitrogen TMDL was approved by RWQCB on August 19, 2003 and subsequently approved by USEPA on March 18, 2004. This TMDL will address this water body condition.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination in the Water Quality Limited Segments Being Addressed portion of the section 303(d) list.
 
Regional Board Staff Decision Recommendation: This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed.
 
 
Line of Evidence (LOE) for Decision ID 34204, Nutrients (Algae)
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 2504
 
Pollutant: Nutrients (Algae)
LOE Subgroup: Pollutant-Water
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Data Reference: Placeholder reference 2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion:
Objective/Criterion Reference:
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation:
Temporal Representation:
Environmental Conditions:
QAPP Information: QA Info Missing
QAPP Information Reference(s):
 
 
DECISION ID
32466
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
Pollutant: Trash
Final Listing Decision: List on 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (being addressed by USEPA approved TMDL)(2012)
Revision Status Original
Sources: Nonpoint Source | Surface Runoff | Urban Runoff/Storm Sewers
TMDL Name: Los Angeles River Trash (12)
TMDL Project Code: 365
Date TMDL Approved by USEPA: 07/24/2008
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for removal on the section 303(d) list under sections 2.2 of the Listing Policy. Under 2.2 of the Policy, a minimum of one line of evidence is needed to assess listing status.

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

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the section 303(d) list. There is sufficient justification to place it in the Being Addressed portion of the 303(d) list because a TMDL has been completed and adopted by the Los Angeles RWQCB and approved by USEPA, and is expected to result in attainment of the standard.
 
Regional Board Staff Decision Recommendation: This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed.
 
 
Line of Evidence (LOE) for Decision ID 32466, Trash
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 2508
 
Pollutant: Trash
LOE Subgroup: Narrative Description Data
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: The Los Angeles River Trash TMDL was completed by the Regional Board on September 19, 2001 (USEPA, 2002) to address impairments caused by trash. However, on July 19, 2006 the State Board rescinded approval of this TMDL and remanded it back to the Regional Board based on court ruling City of Arcadia v. State Water Resources Control Board (D043877).
Data Reference: Placeholder reference 2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion:
Objective/Criterion Reference:
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation:
Temporal Representation:
Environmental Conditions:
QAPP Information: QA Info Missing
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 32466, Trash
Region 4     
Los Angeles River Reach 3 (Figueroa St. to Riverside Dr.)
 
LOE ID: 28079
 
Pollutant: Trash
LOE Subgroup: Narrative Description Data
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: A TMDL has been approved for this water segment-pollutant combination. The Trash TMDL for the Los Angeles River Watershed was adopted by the Los Angeles RWQCB on August 09, 2007 and subsequently approved by USEPA. The TMDL was been integrated into the Basin Plan as Attachment A of Regional Board Resolution No. 2007-012.
Data Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
SWAMP Data: Non-SWAMP
 
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):