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

Supporting Information

Regional Board 4 - Los Angeles Region

Water Body Name: Compton Creek
Water Body ID: CAR4051501019990202111430
Water Body Type: River & Stream
 
DECISION ID
36286
Region 4     
Compton Creek
 
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: 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.
2. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board 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 36286, Copper
Region 4     
Compton Creek
 
LOE ID: 2476
 
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 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 36286, Copper
Region 4     
Compton Creek
 
LOE ID: 83786
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 15
Number of Exceedances: 1
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: One of 15 samples tested for dissolved copper exceeded the numeric criteria promulgated to protect warm freshwater habitat.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 dissolved copper to protect aquatic life in freshwater. The copper 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 hardness of 100 mg/L was used. In addition, Los Angeles Water Board adopted site-specific objectives for copper based on water-effect ratios.
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: W1 was collected from Compton Creek which is approximately located at 108th and Main (as the creek day lights--generally north side of creek). W4 was collected from Compton Creek which is approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side). W6 was collected from Compton Creek which is approximately located at 710 Freeway on the Down stream side.
Temporal Representation: Samples were collected on 8/10/2006, 10/26/2006, 3/8/2007, 10/15/2008, and 10/13/2009.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 36286, Copper
Region 4     
Compton Creek
 
LOE ID: 83787
 
Pollutant: Copper
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality: None of the three samples exceeded the PEC for copper of 149 mg/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects.
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
34507
Region 4     
Compton Creek
 
Pollutant: Lead
Final Listing Decision: Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision: 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: 12/22/2005
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 4.1 of the Listing Policy. Under section 4.1 a single line of evidence are necessary to assess listing status.

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

1 of the 15 samples exceeded the CRITERIA.
0 of the 0 samples exceeded the CRITERIA.
0 of the 3 samples exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for removing this water segment-pollutant combination from the 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 15, 0 of 0 and 0 of 3 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 28 samples is needed to determine if a beneficial use is fully supported using table 4.1.
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 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 34507, Lead
Region 4     
Compton Creek
 
LOE ID: 83800
 
Pollutant: Lead
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 1
 
Data and Information Type: Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality: Lead concentrations found in sediment from station S3 exceeded the narrative objective of 128 mg/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: The consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects. The narrative objective for lead is 128 mg/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 (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions: There were no specific environmental conditions reported during sampling events.
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 34507, Lead
Region 4     
Compton Creek
 
LOE ID: 83799
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 15
Number of Exceedances: 1
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: One of 15 samples tested for dissolved lead exceeded the numeric criteria promulgated to protect warm freshwater habitat.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 for dissolved lead to protect aquatic life in freshwater. The lead 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 hardness of 100 mg/L was used..
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: W1 was collected from Compton Creek which is approximately located at 108th and Main (as the creek day lights--generally north side of creek). W4 was collected from Compton Creek which is approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side). W6 was collected from Compton Creek which is approximately located at 710 Freeway on the Down stream side.
Temporal Representation: Samples were collected on 8/10/2006, 10/26/2006, 3/8/2007, 10/15/2008, and 10/13/2009.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 34507, Lead
Region 4     
Compton Creek
 
LOE ID: 2477
 
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 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
32967
Region 4     
Compton Creek
 
Pollutant: pH
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 on the CWA section 303(d) List under sections 2.2 and 3.2 of the Listing Policy. Under SECTION 3.2 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. 9 of 39 samples exceeded the OBJECTIVE and these exceed the allowable frequency listed in Table 3.2of the Listing Policy.
4. The Los Angeles River Nitrogen was approved by USEPA on 03/18/2004.
5. 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 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 32967, pH
Region 4     
Compton Creek
 
LOE ID: 82654
 
Pollutant: pH
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 39
Number of Exceedances: 9
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Numeric data generated from 39 averages of pH had 9 exceedences.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 sites 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10.
Temporal Representation: Samples were collected approximately once a year from June 2005 to October 2009.
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):
 
Line of Evidence (LOE) for Decision ID 32967, pH
Region 4     
Compton Creek
 
LOE ID: 2472
 
Pollutant: pH
LOE Subgroup: Pollutant-Water
Matrix: Water
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
62053
Region 4     
Compton Creek
 
Pollutant: Aluminum
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.
7 of the 15 samples exceeded the aquatic life CRITERION.

Pursuant to Section 304(a) of the Clean Water Act, U.S. EPA is intending to release updated National Recommended Water Quality Criteria for Aluminum (Al) in spring 2017. Therefore, the Los Angeles Water Board is not recommending listing waterbodies for Al in the current listing cycle and is planning to use the updated criteria in the 2022 listing cycle.
 
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 62053, Aluminum
Region 4     
Compton Creek
 
LOE ID: 83820
 
Pollutant: Aluminum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 15
Number of Exceedances: 7
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Seven of 15 samples tested for total aluminum exceeded the evaluation guideline of 87 ug/L to protect warm freshwater habitat.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 are intended protect aquatic organisms from chronic exposures (expressed as 4-day average concentration) in freshwater. The evaluation guideline for alluminum is 87 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
 
Spatial Representation: W1 was collected from Compton Creek which is approximately located at 108th and Main (as the creek day lights--generally north side of creek). W4 was collected from Compton Creek which is approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side). W6 was collected from Compton Creek which is approximately located at 710 Freeway on the Down stream side.
Temporal Representation: Samples were collected on 8/10/2006, 10/26/2006, 3/8/2007, 10/15/2008, and 10/13/2009.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62051
Region 4     
Compton Creek
 
Pollutant: Ammonia
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board 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 30 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 30 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. 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 62051, Ammonia
Region 4     
Compton Creek
 
LOE ID: 83807
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 30
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 30 samples exceed the water quality objective for ammonia.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Los Angeles Regional Water Quality Control Plan objective one-hour average objective for ammonia as nitrogen for freshwater is a function of pH.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected at W1, W2, W3, W4, W5, and W6.
Temporal Representation: Samples were collected five times between August 10, 2006 and October 13, 2010.
Environmental Conditions:
QAPP Information: Samples were collected by Heal the Bay through a grant from the California Coastal Conservancy in accordance with the Los Angeles/San Gabriel Rivers Watershed Council's Compton Creek Watershed Management Plan. Samples were then analyzed by a certified lab. A signed lab QAPP was included.
QAPP Information Reference(s):
 
 
DECISION ID
62025
Region 4     
Compton Creek
 
Pollutant: Anthracene
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board 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 3 samples exceeded 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 3 samples exceeded 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 62025, Anthracene
Region 4     
Compton Creek
 
LOE ID: 83821
 
Pollutant: Anthracene
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: Non-fixed station physical/chemical (conventional + toxicants)
Data Used to Assess Water Quality: None of the three samples exceeded the PEC for Anthracene of 845 ug/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects. The PEC for Anthracene is 845 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: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62044
Region 4     
Compton Creek
 
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 are necessary to assess listing status.

2 lines of evidence are available in the administrative record to assess this pollutant.
0 of 3 samples exceeded the CRITERIA.
0 of 15 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 3 and 0 of 15 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 62044, Arsenic
Region 4     
Compton Creek
 
LOE ID: 83828
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality: None of the three samples exceeded the PEC for arsenic of 33 mg/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects.
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 62044, Arsenic
Region 4     
Compton Creek
 
LOE ID: 83827
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 15
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: None of 15 samples tested for disolved arsenic exceeded the numeric criteria of 150 ug/L promulgated to protect warm freshwater habitat.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 lists criterion continuous concentrations (expresesed as a 4-day average) for dissolved arsenic to protect aquatic life in freshwater. The numeric criteria for arsenic is 150 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: W1 was collected from Compton Creek which is approximately located at 108th and Main (as the creek day lights--generally north side of creek). W4 was collected from Compton Creek which is approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side). W6 was collected from Compton Creek which is approximately located at 710 Freeway on the Down stream side.
Temporal Representation: Samples were collected on 8/10/2006, 10/26/2006, 3/8/2007, 10/15/2008, and 10/13/2009.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62026
Region 4     
Compton Creek
 
Pollutant: Benzo(a)anthracene
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board 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 3 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 3 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 62026, Benzo(a)anthracene
Region 4     
Compton Creek
 
LOE ID: 83830
 
Pollutant: Benzo(a)anthracene
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: Non-fixed station physical/chemical (conventional + toxicants)
Data Used to Assess Water Quality: None of the three samples exceeded the PEC for Benz[a]anthracene of 1,050 ug/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects. The PEC for Benz[a]anthracene is 1,050 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: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62027
Region 4     
Compton Creek
 
Pollutant: Benzo(a)pyrene (3,4-Benzopyrene -7-d)
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 3 samples exceeded 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 3 samples exceeded 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 62027, Benzo(a)pyrene (3,4-Benzopyrene -7-d)
Region 4     
Compton Creek
 
LOE ID: 83779
 
Pollutant: Benzo(a)pyrene (3,4-Benzopyrene -7-d)
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: Non-fixed station physical/chemical (conventional + toxicants)
Data Used to Assess Water Quality: None of the three samples exceeded the PEC for Benzo[a]pyrene of 1,450 ug/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects. The PEC for Benzo[a]pyrene is 1,450 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: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62028
Region 4     
Compton Creek
 
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 are necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 3 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 3 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 62028, Cadmium
Region 4     
Compton Creek
 
LOE ID: 83780
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
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 3 samples tested for dissolved cadmium exceeded the numeric criteria promulgated to protect warm freshwater habitat.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 for dissolved cadmium to protect aquatic life in freshwater. The cadmium 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.
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: W1 was collected from Compton Creek which is approximately located at 108th and Main (as the creek day lights--generally north side of creek). W4 was collected from Compton Creek which is approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side). W6 was collected from Compton Creek which is approximately located at 710 Freeway on the Down stream side.
Temporal Representation: Samples were collected on 8/10/2006, 10/26/2006, 3/8/2007, 10/15/2008, and 10/13/2009.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62029
Region 4     
Compton Creek
 
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 3.6 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.
1 of 3 samples exceeded 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. 1 of 3 samples exceeded 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 62029, Chlordane
Region 4     
Compton Creek
 
LOE ID: 83781
 
Pollutant: Chlordane
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 1
 
Data and Information Type: Non-fixed station physical/chemical (conventional + toxicants)
Data Used to Assess Water Quality: One of the three samples exceeded the PEC for total Chlordane of 17.6 ug/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects. The PEC for total Chlordane is 17.6 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: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62030
Region 4     
Compton Creek
 
Pollutant: Chlorpyrifos
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board 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 2 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 2 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 62030, Chlorpyrifos
Region 4     
Compton Creek
 
LOE ID: 83782
 
Pollutant: Chlorpyrifos
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the two samples exceeded the water quality evaluation guideline.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: 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 screening criteria is 0.014 ug/L, chronic 4-day average.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
 
Spatial Representation: W4 was collected from Compton Creek which is approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side). W6 was collected from Compton Creek which is approximately located at 710 Freeway on the Down stream side.
Temporal Representation: The samples were collected in 8/10/2006.
Environmental Conditions: There were no specific environmental conditions reported during sampling events.
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62031
Region 4     
Compton Creek
 
Pollutant: Chromium
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.

2 line of evidence is available in the administrative record to assess this pollutant.
0 of 3 samples exceeded the CRITERIA.
0 of 15 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 3 and 0 of 15 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 62031, Chromium
Region 4     
Compton Creek
 
LOE ID: 83784
 
Pollutant: Chromium, trivalent
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 15
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: None of 15 samples tested for dissolved chromium exceeded the numeric criteria promulgated to protect warm freshwater habitat.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 for dissolved trivalent chromium to protect aquatic life in freshwater. The trivalent chromium 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.
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: W1 was collected from Compton Creek which is approximately located at 108th and Main (as the creek day lights--generally north side of creek). W4 was collected from Compton Creek which is approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side). W6 was collected from Compton Creek which is approximately located at 710 Freeway on the Down stream side.
Temporal Representation: Samples were collected on 8/10/2006, 10/26/2006, 3/8/2007, 10/15/2008, and 10/13/2009.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 62031, Chromium
Region 4     
Compton Creek
 
LOE ID: 83783
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality: None of the three samples exceeded the PEC for chromium of 111 mg/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects.
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62047
Region 4     
Compton Creek
 
Pollutant: Chromium, trivalent
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 15 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 15 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 62047, Chromium, trivalent
Region 4     
Compton Creek
 
LOE ID: 83784
 
Pollutant: Chromium, trivalent
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 15
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: None of 15 samples tested for dissolved chromium exceeded the numeric criteria promulgated to protect warm freshwater habitat.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 for dissolved trivalent chromium to protect aquatic life in freshwater. The trivalent chromium 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.
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: W1 was collected from Compton Creek which is approximately located at 108th and Main (as the creek day lights--generally north side of creek). W4 was collected from Compton Creek which is approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side). W6 was collected from Compton Creek which is approximately located at 710 Freeway on the Down stream side.
Temporal Representation: Samples were collected on 8/10/2006, 10/26/2006, 3/8/2007, 10/15/2008, and 10/13/2009.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62032
Region 4     
Compton Creek
 
Pollutant: Chrysene (C1-C4)
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board 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 3 samples exceeded 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 3 samples exceeded 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 62032, Chrysene (C1-C4)
Region 4     
Compton Creek
 
LOE ID: 83785
 
Pollutant: Chrysene (C1-C4)
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: Non-fixed station physical/chemical (conventional + toxicants)
Data Used to Assess Water Quality: None of the three samples exceeded the PEC for Chrysene of 1,290 ug/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects. The PEC for Chrysene is 1,290 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: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
67347
Region 4     
Compton Creek
 
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 lines of evidence are available in the administrative record to assess this pollutant.

1 of 3 samples exceeded 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. 1 of 3 samples exceeded 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 67347, DDD (Dichlorodiphenyldichloroethane)
Region 4     
Compton Creek
 
LOE ID: 83788
 
Pollutant: DDD (Dichlorodiphenyldichloroethane)
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 1
 
Data and Information Type: Non-fixed station physical/chemical (conventional + toxicants)
Data Used to Assess Water Quality: One of the three samples exceeded the PEC for Sum of DDD of 28 ug/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects. The PEC for Sum of DDD is 28 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: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
67348
Region 4     
Compton Creek
 
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 lines of evidence are available in the administrative record to assess this pollutant.

1 of 3 samples exceeded 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. 1 of 3 samples exceeded 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 67348, DDE (Dichlorodiphenyldichloroethylene)
Region 4     
Compton Creek
 
LOE ID: 83789
 
Pollutant: DDE (Dichlorodiphenyldichloroethylene)
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 1
 
Data and Information Type: Non-fixed station physical/chemical (conventional + toxicants)
Data Used to Assess Water Quality: One of the three samples exceeded the PEC for Sum of DDE of 31.3 ug/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects.The PEC 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: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions: There were no specific environmental conditions reported during sampling events.
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62046
Region 4     
Compton Creek
 
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.

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

0 of 3 samples exceeded the GUIDELINE.
0 of 3 samples exceeded 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 3 and 0 of 3 samples exceeded 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 62046, DDT (Dichlorodiphenyltrichloroethane)
Region 4     
Compton Creek
 
LOE ID: 83790
 
Pollutant: DDT (Dichlorodiphenyltrichloroethane)
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: Non-fixed station physical/chemical (conventional + toxicants)
Data Used to Assess Water Quality: None of the three samples exceeded the PEC for sum of DDTs of 62.9 ug/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects. The PEC for sum of DDTs 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: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 62046, DDT (Dichlorodiphenyltrichloroethane)
Region 4     
Compton Creek
 
LOE ID: 83791
 
Pollutant: Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: Non-fixed station physical/chemical (conventional + toxicants)
Data Used to Assess Water Quality: None of the three samples exceeded the PEC for Total DDTs of 572 ug/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects. The PEC for Total DDTs is 572 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: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62033
Region 4     
Compton Creek
 
Pollutant: Demeton
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board 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 4 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 4 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 62033, Demeton
Region 4     
Compton Creek
 
LOE ID: 83792
 
Pollutant: Demeton
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 4 samples for Demeton o and Demeton s exceeded the water quality evaluation guideline.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: USEPA National Recommended Water Quality Criteria lists criterion continuous concentrations for Demeton to protect aquatic life in freshwater at 0.1 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
 
Spatial Representation: W4 was collected from Compton Creek which is approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side). W6 was collected from Compton Creek which is approximately located at 710 Freeway on the Down stream side.
Temporal Representation: The samples were collected in 8/10/2006.
Environmental Conditions: There were no specific environmental conditions reported during sampling events.
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62034
Region 4     
Compton Creek
 
Pollutant: Diazinon
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board 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 2 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 2 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 62034, Diazinon
Region 4     
Compton Creek
 
LOE ID: 83793
 
Pollutant: Diazinon
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the two samples exceeded the water quality evaluation guideline.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: 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 screening criteria is 0.05 ug/L, chronic 4-day average.
Guideline Reference: Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
 
Spatial Representation: W4 was collected from Compton Creek which is approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side). W6 was collected from Compton Creek which is approximately located at 710 Freeway on the Down stream side.
Temporal Representation: The samples were collected in 8/10/2006.
Environmental Conditions: There were no specific environmental conditions reported during sampling events.
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62035
Region 4     
Compton Creek
 
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 3.6 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 3 samples exceeded 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 3 samples exceeded 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 62035, Dieldrin
Region 4     
Compton Creek
 
LOE ID: 83794
 
Pollutant: Dieldrin
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: Non-fixed station physical/chemical (conventional + toxicants)
Data Used to Assess Water Quality: None of the three samples exceeded the PEC for Dieldrin of 61.8 ug/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects. The PEC for Dieldrin is 61.8 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: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62036
Region 4     
Compton Creek
 
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 3.6 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 3 samples exceeded 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 3 samples exceeded 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 62036, Endrin
Region 4     
Compton Creek
 
LOE ID: 83795
 
Pollutant: Endrin
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: Non-fixed station physical/chemical (conventional + toxicants)
Data Used to Assess Water Quality: None of the three samples exceeded the PEC for Endrin of 207 ug/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects. The PEC for Endrin is 207 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: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62037
Region 4     
Compton Creek
 
Pollutant: Fluoranthene
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board 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 3 samples exceeded 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 3 samples exceeded 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 62037, Fluoranthene
Region 4     
Compton Creek
 
LOE ID: 83796
 
Pollutant: Fluoranthene
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: Non-fixed station physical/chemical (conventional + toxicants)
Data Used to Assess Water Quality: None of the three samples exceeded the PEC for Fluoranthene of 2,230 ug/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects. The PEC for Fluoranthene is 2,230 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: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62038
Region 4     
Compton Creek
 
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 3.6 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 3 samples exceeded 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 3 samples exceeded 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 62038, Heptachlor epoxide
Region 4     
Compton Creek
 
LOE ID: 83797
 
Pollutant: Heptachlor epoxide
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: Non-fixed station physical/chemical (conventional + toxicants)
Data Used to Assess Water Quality: None of the three samples exceeded the PEC for Heptachlor Epoxide of 16 ug/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects. The PEC for Heptachlor Epoxide is 16 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: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62048
Region 4     
Compton Creek
 
Pollutant: Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board 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 0 sample exceeded 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 0 sample exceeded 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 62048, Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
Region 4     
Compton Creek
 
LOE ID: 83801
 
Pollutant: Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Non-fixed station physical/chemical (conventional + toxicants)
Data Used to Assess Water Quality: Data were not of sufficient resolution to assess sediment quality. The reporting limits were lower than the PEC criteria of 4.99 ug/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects. The PEC criteria is 4.99 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: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62039
Region 4     
Compton Creek
 
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 3.6 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 3 samples exceeded 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 3 samples exceeded 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 62039, Mercury
Region 4     
Compton Creek
 
LOE ID: 83802
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality: None of the three samples exceeded the PEC for mercury of 1.06 mg/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects.
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62049
Region 4     
Compton Creek
 
Pollutant: Methyl Parathion
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 2 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 2 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 62049, Methyl Parathion
Region 4     
Compton Creek
 
LOE ID: 83803
 
Pollutant: Methyl Parathion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the two samples exceeded the water quality evaluation guideline.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: 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 Department of Fish and Game instantaneous criteria for Methyl parathion; parathion, methyl is 0.08 ug/L.
Guideline Reference: Hazard Assessment of the Insecticide Methyl to Aquatic Organisms in the Sacramento River System
 
Spatial Representation: W4 was collected from Compton Creek which is approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side). W6 was collected from Compton Creek which is approximately located at 710 Freeway on the Down stream side.
Temporal Representation: The samples were collected in 8/10/2006.
Environmental Conditions: There were no specific environmental conditions reported during sampling events.
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62040
Region 4     
Compton Creek
 
Pollutant: Naphthalene
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 3 samples exceeded 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 3 samples exceeded 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 62040, Naphthalene
Region 4     
Compton Creek
 
LOE ID: 83804
 
Pollutant: Naphthalene
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: Non-fixed station physical/chemical (conventional + toxicants)
Data Used to Assess Water Quality: None of the three samples exceeded the PEC for Naphthalene of 561 ug/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects. The PEC for Naphthalene is 561 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: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62045
Region 4     
Compton Creek
 
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 are necessary to assess listing status.

2 lines of evidence are available in the administrative record to assess this pollutant.
0 of 3 samples exceeded the CRITERIA.
0 of 15 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 3 and 0 of 15 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 62045, Nickel
Region 4     
Compton Creek
 
LOE ID: 83805
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 15
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 15 samples tested for dissolved nickel exceeded the numeric criteria promulgated to protect warm freshwater habitat.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 (expressed as a 4-day average concentration) for dissolved nickel to protect aquatic life in freshwater. The nickel 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 hardness of 100 mg/L was used.
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: W1 was collected from Compton Creek which is approximately located at 108th and Main (as the creek day lights--generally north side of creek). W4 was collected from Compton Creek which is approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side). W6 was collected from Compton Creek which is approximately located at 710 Freeway on the Down stream side.
Temporal Representation: Samples were collected on 8/10/2006, 10/26/2006, 3/8/2007, 10/15/2008, and 10/13/2009.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 62045, Nickel
Region 4     
Compton Creek
 
LOE ID: 83806
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality: None of the three samples exceeded the PEC for nickel of 48.6 mg/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects.
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62042
Region 4     
Compton Creek
 
Pollutant: PAHs (Polycyclic Aromatic Hydrocarbons)
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 3 samples exceeded 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 3 samples exceeded 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 62042, PAHs (Polycyclic Aromatic Hydrocarbons)
Region 4     
Compton Creek
 
LOE ID: 83808
 
Pollutant: PAHs (Polycyclic Aromatic Hydrocarbons)
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: Non-fixed station physical/chemical (conventional + toxicants)
Data Used to Assess Water Quality: None of the three samples exceeded the PEC for Total PAHs of 22,800 ug/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects. The PEC for Total PAHs is 22,800 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: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62041
Region 4     
Compton Creek
 
Pollutant: Phenanthrene
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 3 samples exceeded 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 3 samples exceeded 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 62041, Phenanthrene
Region 4     
Compton Creek
 
LOE ID: 83809
 
Pollutant: Phenanthrene
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: Non-fixed station physical/chemical (conventional + toxicants)
Data Used to Assess Water Quality: None of the three samples exceeded the PEC for Phenanthrene of 1,170 ug/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects. The PEC for Phenanthrene is 1,170 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: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62043
Region 4     
Compton Creek
 
Pollutant: Pyrene
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board 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 3 samples exceeded 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 3 samples exceeded 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 62043, Pyrene
Region 4     
Compton Creek
 
LOE ID: 83810
 
Pollutant: Pyrene
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: Non-fixed station physical/chemical (conventional + toxicants)
Data Used to Assess Water Quality: None of the three samples exceeded the PEC for Pyrene of 1,520 ug/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects. The PEC for Pyrene is 1,520 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: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62050
Region 4     
Compton Creek
 
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 are necessary to assess listing status.

1 line of evidence is available in the administrative record to assess this pollutant.
0 of 14 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 14 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 62050, Selenium
Region 4     
Compton Creek
 
LOE ID: 83811
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: None of the 14 samples tested for total selenium exceeded the recommended criteria of 5 ug/L.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 are intended protect freshwater aquatic organisms from chronic exposures and are expressed as 4-day average concentrations. The recommended criteria for selenium is 5 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
 
Spatial Representation: W1 was collected from Compton Creek which is approximately located at 108th and Main (as the creek day lights--generally north side of creek). W4 was collected from Compton Creek which is approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side). W6 was collected from Compton Creek which is approximately located at 710 Freeway on the Down stream side.
Temporal Representation: Samples were collected on 8/10/2006, 10/26/2006, 3/8/2007, 10/15/2008, and 10/13/2009.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
62052
Region 4     
Compton Creek
 
Pollutant: Iron
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 3.1 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.
2 of 15 samples exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 2 of 15 samples exceeded the CRITERIA and this exceeds the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board 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 62052, Iron
Region 4     
Compton Creek
 
LOE ID: 83798
 
Pollutant: Iron
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 15
Number of Exceedances: 2
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Two of the 15 samples tested for total iron exceeded the recommended numeric criteria of 1,000 ug/L to protect warm freshwater habitat.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 are intended protect freshwater aquatic organisms from chronic exposures and are expressed as 4-day average concentrations. The recommended numeric criteria for iron is 1,000 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
 
Spatial Representation: W1 was collected from Compton Creek which is approximately located at 108th and Main (as the creek day lights--generally north side of creek). W4 was collected from Compton Creek which is approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side). W6 was collected from Compton Creek which is approximately located at 710 Freeway on the Down stream side.
Temporal Representation: Samples were collected on 8/10/2006, 10/26/2006, 3/8/2007, 10/15/2008, and 10/13/2009.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River. Dissolved concentrations do not exceed the narrative objective.
QAPP Information Reference(s):
 
 
DECISION ID
62054
Region 4     
Compton Creek
 
Pollutant: Zinc
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 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 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.
2 of 15 samples exceeded the CRITERIA.
0 of 3 samples exceeded the CRITERIA.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. 2 of 15 samples exceeded the CRITERIA and this exceeds the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.


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.
2. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board 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 62054, Zinc
Region 4     
Compton Creek
 
LOE ID: 83813
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality: None of the three samples exceeded the PEC for zinc of 459 mg/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: The consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects. The PEC for zinc is 459 mg/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 (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions: There were no specific environmental conditions reported during sampling events.
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 62054, Zinc
Region 4     
Compton Creek
 
LOE ID: 83812
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 15
Number of Exceedances: 2
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Two of 15 samples tested for dissolved zinc exceeded the numeric criteria promulgated to protect warm freshwater habitat.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 (expressed as a 4-day average concentration) for dissolved zinc to protect aquatic life in freshwater. The zinc 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 hardness of 100 mg/L was used.
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: W1 was collected from Compton Creek which is approximately located at 108th and Main (as the creek day lights--generally north side of creek). W4 was collected from Compton Creek which is approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side). W6 was collected from Compton Creek which is approximately located at 710 Freeway on the Down stream side.
Temporal Representation: Samples were collected on 8/10/2006, 10/26/2006, 3/8/2007, 10/15/2008, and 10/13/2009.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
 
DECISION ID
44498
Region 4     
Compton Creek
 
Pollutant: Benthic Community Effects
Final Listing Decision: Do Not Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (TMDL required list)(2012)
Revision Status Original
Sources: Source Unknown
Expected TMDL Completion Date: 2021
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 4.9 of the Listing Policy. All three of the more recent bioassessment surveys in this water body showed the benthic community to be likely impacted or in poor condition. Additionally, this water body is impaired due to several pollutants.


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. All three of the more recent bioassessment surveys in this water body showed the benthic community to be likely impacted or in poor condition. Additionally, this water body is impaired due to several pollutants.
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 44498, Benthic Community Effects
Region 4     
Compton Creek
 
LOE ID: 30224
 
Pollutant: Benthic-Macroinvertebrate Bioassessments
LOE Subgroup: Population/Community Degradation
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Cold Freshwater Habitat | Preservation of Rare & Endangered Species | Wetland Habitat | Wildlife Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Benthic macroinvertebrate surveys
Data Used to Assess Water Quality: The IBI scores at this site ranked in the ?very poor? range (1 in 2003 and 3 in 2004).
Data Reference: Los Angeles County 1994-2005 Integrated Receiving Water Impacts Report. Section 5, Los Angeles River Watershed Management Area, pp5.1 - 5.40
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Los Angeles RWQCB Basin Plan Objectives for Toxicity which states ?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, analyses of species diversity, population density, growth anomalies, bioassays of appropriate duration or other appropraite 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 according to very good (80-56), good (41-55), fair (27-40), poor (14-26) and very poor (0-13) habitat conditions. Sites with scores below 26 are considered to have impaired conditions.
Guideline Reference: A Quantitative Tool for Assessing the Integrity of Southern Coastal California Streams. Appendix 7-B Environmental Management Vol. 35, No. 4, pp. 493-504.
  Los Angeles County 1994-2005 Integrated Receiving Water Impacts Report. Section 3, Methods, pp3.1 - 3.28
  Los Angeles County 1994-2005 Integrated Receiving Water Impacts Report. Section 5, Los Angeles River Watershed Management Area, pp5.1 - 5.40
 
Spatial Representation: One site in Compton Creek was sampled, upstream
of the confluence with the Los Angeles River, at N 33 50.784? W 118 12.528.
Temporal Representation: Sites were sampled in October of 2003 and October of 2004.
Environmental Conditions: Benthic macroinvertebrate populations and IBI scores may also be affected by a wide range of anthropogenic stressors.
QAPP Information: Data was collected in compliance with California Stream Bioassessment Procedure.
QAPP Information Reference(s): California Stream Bioassessment Procedure (Protocol Brief for Biological and Physical/Habitat Assessment in Wadeable Streams) California Department of Fish and Game Water Pollution Control Laboratory Aquatic Bioassessment Laboratory Revision Date - December, 2003
  Los Angeles County 1994-2005 Integrated Receiving Water Impacts Report. Section 3, Methods, pp3.1 - 3.28
 
Line of Evidence (LOE) for Decision ID 44498, Benthic Community Effects
Region 4     
Compton Creek
 
LOE ID: 30162
 
Pollutant: Trash
LOE Subgroup: Narrative Description Data
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Non-Contact Recreation
 
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 44498, Benthic Community Effects
Region 4     
Compton Creek
 
LOE ID: 83812
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 15
Number of Exceedances: 2
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Two of 15 samples tested for dissolved zinc exceeded the numeric criteria promulgated to protect warm freshwater habitat.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 (expressed as a 4-day average concentration) for dissolved zinc to protect aquatic life in freshwater. The zinc 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 hardness of 100 mg/L was used.
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: W1 was collected from Compton Creek which is approximately located at 108th and Main (as the creek day lights--generally north side of creek). W4 was collected from Compton Creek which is approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side). W6 was collected from Compton Creek which is approximately located at 710 Freeway on the Down stream side.
Temporal Representation: Samples were collected on 8/10/2006, 10/26/2006, 3/8/2007, 10/15/2008, and 10/13/2009.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 44498, Benthic Community Effects
Region 4     
Compton Creek
 
LOE ID: 83820
 
Pollutant: Aluminum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 15
Number of Exceedances: 7
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Seven of 15 samples tested for total aluminum exceeded the evaluation guideline of 87 ug/L to protect warm freshwater habitat.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 are intended protect aquatic organisms from chronic exposures (expressed as 4-day average concentration) in freshwater. The evaluation guideline for alluminum is 87 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
 
Spatial Representation: W1 was collected from Compton Creek which is approximately located at 108th and Main (as the creek day lights--generally north side of creek). W4 was collected from Compton Creek which is approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side). W6 was collected from Compton Creek which is approximately located at 710 Freeway on the Down stream side.
Temporal Representation: Samples were collected on 8/10/2006, 10/26/2006, 3/8/2007, 10/15/2008, and 10/13/2009.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 44498, Benthic Community Effects
Region 4     
Compton Creek
 
LOE ID: 83829
 
Pollutant: Benthic-Macroinvertebrate Bioassessments
LOE Subgroup: Population/Community Degradation
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 3
 
Data and Information Type: Benthic macroinvertebrate surveys
Data Used to Assess Water Quality: Three samples were collected from Compton Creek over three years. Two of the two samples collected had IBI scores below 40. The scores were 6 (2006), 6 (2007) and 3 (2008).
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 Compton Creek upstream of the confluence with the Los Angeles River, station 8.
Temporal Representation: The samples were collected in 2006, 2007 and 2008.
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 44498, Benthic Community Effects
Region 4     
Compton Creek
 
LOE ID: 83786
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 15
Number of Exceedances: 1
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: One of 15 samples tested for dissolved copper exceeded the numeric criteria promulgated to protect warm freshwater habitat.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 dissolved copper to protect aquatic life in freshwater. The copper 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 hardness of 100 mg/L was used. In addition, Los Angeles Water Board adopted site-specific objectives for copper based on water-effect ratios.
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: W1 was collected from Compton Creek which is approximately located at 108th and Main (as the creek day lights--generally north side of creek). W4 was collected from Compton Creek which is approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side). W6 was collected from Compton Creek which is approximately located at 710 Freeway on the Down stream side.
Temporal Representation: Samples were collected on 8/10/2006, 10/26/2006, 3/8/2007, 10/15/2008, and 10/13/2009.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 44498, Benthic Community Effects
Region 4     
Compton Creek
 
LOE ID: 83787
 
Pollutant: Copper
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality: None of the three samples exceeded the PEC for copper of 149 mg/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects.
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: All spatially dependent samples (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 44498, Benthic Community Effects
Region 4     
Compton Creek
 
LOE ID: 4094
 
Pollutant: Coliform Bacteria
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Data Reference: Placeholder reference pre-2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Unspecified
Objective/Criterion Reference: Placeholder reference pre-2006 303(d)
 
Evaluation Guideline: Unspecified
Guideline Reference: Placeholder reference pre-2006 303(d)
 
Spatial Representation: Unspecified
Temporal Representation: Unspecified
Environmental Conditions: Unspecified
QAPP Information: Unspecified
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 44498, Benthic Community Effects
Region 4     
Compton Creek
 
LOE ID: 2476
 
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 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 44498, Benthic Community Effects
Region 4     
Compton Creek
 
LOE ID: 2475
 
Pollutant: Trash
LOE Subgroup: Pollutant-Nuisance
Matrix: -N/A
Fraction: None
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Volunteers removed 26.5 tons of trash from Compton Creek on Coastal Clean Up Days and Earth Days between 2002 and 2005 (Heal the Bay, 2006).
Data Reference: Placeholder reference 2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: From the Los Angeles RWQCB Basin Plan: Waters shall not contain floating materials, including solids, liquids, foams, and scum, in concentrations that cause nuisance or adversely affect beneficial uses.
Objective/Criterion Reference: Placeholder reference 2006 303(d)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Compton Creek.
Temporal Representation: Coastal Clean Up Day (September 21, 2002; September 20, 2003; September 18, 2004; September 17, 2005) and Earth Day (April 1, 2003; April 17, 2004; April 30, 2005).
Environmental Conditions:
QAPP Information: Heal the Bay.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 44498, Benthic Community Effects
Region 4     
Compton Creek
 
LOE ID: 2473
 
Pollutant: Trash
LOE Subgroup: Visual
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: QUALITATIVE (EVALUATED) ASSESSMENT - UNSPECIFIED
Data Used to Assess Water Quality: Photos showing large amounts of trash throughout Compton Creek. Heal the Bay states that they have been the Los Angeles County Coordinator for Coastal Clean-Up Day and Earth Day at 15 over 60 locations over the last 15 years. According to Heal the Bay, none of these other locations has ever come close to being as polluted with trash as Compton Creek.
Data Reference: Placeholder reference 2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: From the Los Angeles RWQCB Basin Plan: Waters shall not contain floating materials, including solids, liquids, foams, and scum, in concentrations that cause nuisance or adversely affect beneficial uses.
Objective/Criterion Reference: Placeholder reference 2006 303(d)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Various locations throughout Compton Creek.
Temporal Representation: Photos taken between 2002 and 2005.
Environmental Conditions:
QAPP Information: QA Info Missing
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 44498, Benthic Community Effects
Region 4     
Compton Creek
 
LOE ID: 83813
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical monitoring (conventional pollutants only)
Data Used to Assess Water Quality: None of the three samples exceeded the PEC for zinc of 459 mg/kg dry weight.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in, human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: The consensus based probable effect concentrations (PEC) were used to screen sediment concentrations for potential toxic effects. The PEC for zinc is 459 mg/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 (S1, S3, & S5) were collected from sediments within Compton Creek. S1 was approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side); S3 was approximately located at the down stream side of 91 Freeway; and S5 was approximately located at a day-lighted sub-tributary adjacent to County bike path (access is off of Santa Fe through rail spur).
Temporal Representation: Samples were collected on 10/26/2006.
Environmental Conditions: There were no specific environmental conditions reported during sampling events.
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 44498, Benthic Community Effects
Region 4     
Compton Creek
 
LOE ID: 83798
 
Pollutant: Iron
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 15
Number of Exceedances: 2
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Two of the 15 samples tested for total iron exceeded the recommended numeric criteria of 1,000 ug/L to protect warm freshwater habitat.
Data Reference: Data for various pollutants in Compton Creek, Oct. 2006-Dec. 2009.
 
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 are intended protect freshwater aquatic organisms from chronic exposures and are expressed as 4-day average concentrations. The recommended numeric criteria for iron is 1,000 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
 
Spatial Representation: W1 was collected from Compton Creek which is approximately located at 108th and Main (as the creek day lights--generally north side of creek). W4 was collected from Compton Creek which is approximately located at Crystal Park Casino (sample collected in the earth-bottom portion of the creek at first palm tree on Casino side). W6 was collected from Compton Creek which is approximately located at 710 Freeway on the Down stream side.
Temporal Representation: Samples were collected on 8/10/2006, 10/26/2006, 3/8/2007, 10/15/2008, and 10/13/2009.
Environmental Conditions:
QAPP Information: Heal the Bays, "Compton Creek Monitoring Program" description provided with data submitted. This monitoring program is part of the Citys Total Maximum Daily Load ambient monitoring efforts to monitor inputs to the Los Angeles River. Dissolved concentrations do not exceed the narrative objective.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 44498, Benthic Community Effects
Region 4     
Compton Creek
 
LOE ID: 2474
 
Pollutant: Trash
LOE Subgroup: Pollutant-Water
Matrix: -N/A
Fraction: Dissolved
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Los Angeles County Department of Public Works removed 135.18 tons of trash from Compton Creek between July of 2002 and October of 2005 (Heal the Bay, 2006).
Data Reference: Placeholder reference 2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: From the Los Angeles RWQCB Basin Plan: Waters shall not contain floating materials, including solids, liquids, foams, and scum, in concentrations that cause nuisance or adversely affect beneficial uses.
Objective/Criterion Reference: Placeholder reference 2006 303(d)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Compton Creek.
Temporal Representation: Trash removed between July of 2002 and October of 2005.
Environmental Conditions:
QAPP Information: Los Angeles County Department of Public Works.
QAPP Information Reference(s):
 
 
DECISION ID
42688
Region 4     
Compton Creek
 
Pollutant: Toxicity
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2012)
Revision Status Original
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: This pollutant is being considered for placement on the section 303(d) list under section 3.6 of the Listing Policy. Under section 3.6 a one line of evidence is necessary to assess listing status.

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

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. Zero of one samples exhibited significant toxicity to Pimephales promelas and Ceriodaphnia dubia and this sample size is insufficient to determine with the power and confidence of the Listing Policy if standards are not met. A minimum of two samples is needed for application of 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: 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. The decision has not changed.
 
 
Line of Evidence (LOE) for Decision ID 42688, Toxicity
Region 4     
Compton Creek
 
LOE ID: 28251
 
Pollutant: Toxicity
LOE Subgroup: Toxicity
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Wildlife Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: TOXICITY TESTING
Data Used to Assess Water Quality: Zero out of one samples exhibited significant acute and chronic toxicity to Pimephales promelas and Ceriodaphnia dubia. Water quality samples for toxicity were taken in compliance with the Surface Water Ambient Monitoring Program's monitoring and testing parameters.
Data Reference: Surface Water Ambient Monitoring Program data for all watersheds in the Los Angeles Region 2001-2005.
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The Basin Plan states at there shall be no acute or chronic toxicity in ambient waters outside mixing zones.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
 
Evaluation Guideline: Toxicity was defined as a statistically significant effect in the sample exposure compared to the control using EPA recommended hypothesis testing (parametric Dunnett's Test or non-parametric Fisher's Exact Test).
Guideline Reference: Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms, Fourth Edition. EPA 600/4-90/27.
 
Spatial Representation: Water toxicity monitoring was conducted in Compton Creek at station 412LARCMP (Lat: 33.84644, Long: -118.20883).
Temporal Representation: A grab sample was taken on 06/30/2005.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in the Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program.
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
 
DECISION ID
40596
Region 4     
Compton Creek
 
Pollutant: Indicator Bacteria
Final Listing Decision: List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (TMDL required list)(2012)
Revision Status Original
Sources: Source Unknown
Expected TMDL Completion Date: 2009
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Staff Conclusion: 303(d) listing decisions made prior to 2006 were not held in an assessment database. The Regional Boards will update this decision when new data and information become available and are assessed.
 
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. The decision has not changed.
 
 
Line of Evidence (LOE) for Decision ID 40596, Indicator Bacteria
Region 4     
Compton Creek
 
LOE ID: 4094
 
Pollutant: Coliform Bacteria
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Data Reference: Placeholder reference pre-2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Unspecified
Objective/Criterion Reference: Placeholder reference pre-2006 303(d)
 
Evaluation Guideline: Unspecified
Guideline Reference: Placeholder reference pre-2006 303(d)
 
Spatial Representation: Unspecified
Temporal Representation: Unspecified
Environmental Conditions: Unspecified
QAPP Information: Unspecified
QAPP Information Reference(s):
 
 
DECISION ID
35164
Region 4     
Compton Creek
 
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
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.

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

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the section 303(d) list. 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. The decision has not changed.
 
 
Line of Evidence (LOE) for Decision ID 35164, Trash
Region 4     
Compton Creek
 
LOE ID: 2475
 
Pollutant: Trash
LOE Subgroup: Pollutant-Nuisance
Matrix: -N/A
Fraction: None
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Volunteers removed 26.5 tons of trash from Compton Creek on Coastal Clean Up Days and Earth Days between 2002 and 2005 (Heal the Bay, 2006).
Data Reference: Placeholder reference 2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: From the Los Angeles RWQCB Basin Plan: Waters shall not contain floating materials, including solids, liquids, foams, and scum, in concentrations that cause nuisance or adversely affect beneficial uses.
Objective/Criterion Reference: Placeholder reference 2006 303(d)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Compton Creek.
Temporal Representation: Coastal Clean Up Day (September 21, 2002; September 20, 2003; September 18, 2004; September 17, 2005) and Earth Day (April 1, 2003; April 17, 2004; April 30, 2005).
Environmental Conditions:
QAPP Information: Heal the Bay.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 35164, Trash
Region 4     
Compton Creek
 
LOE ID: 2473
 
Pollutant: Trash
LOE Subgroup: Visual
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: QUALITATIVE (EVALUATED) ASSESSMENT - UNSPECIFIED
Data Used to Assess Water Quality: Photos showing large amounts of trash throughout Compton Creek. Heal the Bay states that they have been the Los Angeles County Coordinator for Coastal Clean-Up Day and Earth Day at 15 over 60 locations over the last 15 years. According to Heal the Bay, none of these other locations has ever come close to being as polluted with trash as Compton Creek.
Data Reference: Placeholder reference 2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: From the Los Angeles RWQCB Basin Plan: Waters shall not contain floating materials, including solids, liquids, foams, and scum, in concentrations that cause nuisance or adversely affect beneficial uses.
Objective/Criterion Reference: Placeholder reference 2006 303(d)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Various locations throughout Compton Creek.
Temporal Representation: Photos taken between 2002 and 2005.
Environmental Conditions:
QAPP Information: QA Info Missing
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 35164, Trash
Region 4     
Compton Creek
 
LOE ID: 2474
 
Pollutant: Trash
LOE Subgroup: Pollutant-Water
Matrix: -N/A
Fraction: Dissolved
 
Beneficial Use: Non-Contact Recreation
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Los Angeles County Department of Public Works removed 135.18 tons of trash from Compton Creek between July of 2002 and October of 2005 (Heal the Bay, 2006).
Data Reference: Placeholder reference 2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: From the Los Angeles RWQCB Basin Plan: Waters shall not contain floating materials, including solids, liquids, foams, and scum, in concentrations that cause nuisance or adversely affect beneficial uses.
Objective/Criterion Reference: Placeholder reference 2006 303(d)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Compton Creek.
Temporal Representation: Trash removed between July of 2002 and October of 2005.
Environmental Conditions:
QAPP Information: Los Angeles County Department of Public Works.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 35164, Trash
Region 4     
Compton Creek
 
LOE ID: 30162
 
Pollutant: Trash
LOE Subgroup: Narrative Description Data
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Non-Contact Recreation
 
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.
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