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

# Supporting Information

## Regional Board 3 - Central Coast Region

Water Body Name: | Pacific Ocean at Avila Beach (Avila Pier)
Water Body ID: | 3001
Water Body Type: | Coastal & Bay Shoreline

DECISION ID | 10440
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
Weight of Evidence: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. None 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. For both lines of evidence zero of 15 samples exceeded the evaluation guideline (Brodberg and Pollock 1999) as it applies to both Shellfish Harvesting and Commercial or Recreational Fishing as beneficial uses. This does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation: |
USEPA Decision: |

Lines of Evidence (LOEs) for Decision ID 10440

LOE ID: | 14854
Pollutant: | Chlorpyrifos
LOE Subgroup: | Pollutant-Tissue
Matrix: | Tissue
Fraction: | None
Beneficial Use: | Shellfish Harvesting
Number of Samples: | 15
Number of Exceedances: | 0
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Sand Crab Tissue Monitoring (SandCrabs) data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Chlorpyrifos.
Data Reference: | Final Data File used for assessment: SWAMP Sand Crab Tissue Data
Water Quality Objective/Criterion: | OEHHA Screening value for the protection of human health from the consumption of fish and shellfish. Brodberg and Pollock calculated "California Lakes Screening Values" for a 70 kg adult human and based on a fish consumption value of 21 g/day (1999)
Objective/Criterion Reference:
Evaluation Guideline: | OEHHA Screening Value in fish and shellfish tissue for Chlorpyrifos is 10000.0 ug/Kg
Guideline Reference: | Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach (Avila Pier) was collected at 14 monitoring sites [ SCS02OOAB001 - Avila Beach at pier, SCS02OOAB002 - Avila Beach at pier, SCS02OOAB003 - Avila Beach 30E of pier, SCS02OOAB004 - Avila Beach 30E of pier, SCS02OOAB005 - Avila Beach 100E of pier, SCS02OOAB006 - Avila Beach 100E of pier, SCS02OOAB007 - Avila Beach 530E of pier, SCS02OOAB008 - Avila Beach 530E of pier, SCS02OOAB009 - Avila Beach 10W of beach, SCS02OOAB010 - Avila Beach 10W of beach, SCS02OOAB011 - Avila Beach 100W of beach, SCS02OOAB012 - Avila Beach 100W of beach, SCS02OOAB013 - Avila Beach 250W of pier, SCS02OOAB014 - Avila Beach 250W of pier]
Temporal Representation: | Data was collected on a single day 8/26/2002.
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are not included in data submission.
QAPP Information Reference(s):
LOE ID: | 14853
Pollutant: | Chlorpyrifos
LOE Subgroup: | Pollutant-Tissue
Matrix: | Tissue
Fraction: | None
Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples: | 15
Number of Exceedances: | 0
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Sand Crab Tissue Monitoring (SandCrabs) data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Chlorpyrifos.
Data Reference: | Final Data File used for assessment: SWAMP Sand Crab Tissue Data
Water Quality Objective/Criterion: | A water segment shall be placed on the section 303(d) list if the tissue pollutant levels in organisms exceed a pollutant-specific evaluation guideline (OEHHA or EPA) using the binomial distribution as described in section 3.1 (Water Quality Control Policy, SWRCB 2004)
Objective/Criterion Reference: | Water Quality Control Plan Central Coast Region (R3) Basin Plan
Evaluation Guideline: | For the protection of human health from the consumption of fish and shellfish, the OEHHA screening value for Chlorpyrifos is 10,000 ug/Kg wet weight (Brodberg and Pollock 1999)
Guideline Reference: | Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach (Avila Pier) was collected at 14 monitoring sites [ SCS02OOAB001 - Avila Beach at pier, SCS02OOAB002 - Avila Beach at pier, SCS02OOAB003 - Avila Beach 30E of pier, SCS02OOAB004 - Avila Beach 30E of pier, SCS02OOAB005 - Avila Beach 100E of pier, SCS02OOAB006 - Avila Beach 100E of pier, SCS02OOAB007 - Avila Beach 530E of pier, SCS02OOAB008 - Avila Beach 530E of pier, SCS02OOAB009 - Avila Beach 10W of beach, SCS02OOAB010 - Avila Beach 10W of beach, SCS02OOAB011 - Avila Beach 100W of beach, SCS02OOAB012 - Avila Beach 100W of beach, SCS02OOAB013 - Avila Beach 250W of pier, SCS02OOAB014 - Avila Beach 250W of pier]
Temporal Representation: | Data was collected on a single day 8/26/2002.
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are not included in data submission.
QAPP Information Reference(s):

DECISION ID | 10442
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
Weight of Evidence: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. None 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. For both lines of evidence zero of 15 samples exceeded the evaluation guideline (Brodberg and Pollock 1999) as it applies to both Shellfish Harvesting and Commercial or Recreational Fishing as beneficial uses. This does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation: |
USEPA Decision: |

Lines of Evidence (LOEs) for Decision ID 10442

LOE ID: | 14874
Pollutant: | Diazinon
LOE Subgroup: | Pollutant-Tissue
Matrix: | Tissue
Fraction: | None
Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples: | 15
Number of Exceedances: | 0
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Sand Crab Tissue Monitoring (SandCrabs) data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Diazinon.
Data Reference: | Final Data File used for assessment: SWAMP Sand Crab Tissue Data
Water Quality Objective/Criterion: | A water segment shall be placed on the section 303(d) list if the tissue pollutant levels in organisms exceed a pollutant-specific evaluation guideline (OEHHA or EPA) using the binomial distribution as described in section 3.1 (Water Quality Control Policy, SWRCB 2004)
Objective/Criterion Reference: | Water Quality Control Plan Central Coast Region (R3) Basin Plan
Evaluation Guideline: | For the protection of human health from the consumption of fish and shellfish, the OEHHA screening value for Diazinon is 300 ug/Kg wet weight (Brodberg and Pollock 1999)
Guideline Reference: | Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach (Avila Pier) was collected at 14 monitoring sites [ SCS02OOAB001 - Avila Beach at pier, SCS02OOAB002 - Avila Beach at pier, SCS02OOAB003 - Avila Beach 30E of pier, SCS02OOAB004 - Avila Beach 30E of pier, SCS02OOAB005 - Avila Beach 100E of pier, SCS02OOAB006 - Avila Beach 100E of pier, SCS02OOAB007 - Avila Beach 530E of pier, SCS02OOAB008 - Avila Beach 530E of pier, SCS02OOAB009 - Avila Beach 10W of beach, SCS02OOAB010 - Avila Beach 10W of beach, SCS02OOAB011 - Avila Beach 100W of beach, SCS02OOAB012 - Avila Beach 100W of beach, SCS02OOAB013 - Avila Beach 250W of pier, SCS02OOAB014 - Avila Beach 250W of pier]
Temporal Representation: | Data was collected on a single day 8/26/2002.
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are not included in data submission.
QAPP Information Reference(s):
LOE ID: | 14875
Pollutant: | Diazinon
LOE Subgroup: | Pollutant-Tissue
Matrix: | Tissue
Fraction: | None
Beneficial Use: | Shellfish Harvesting
Number of Samples: | 15
Number of Exceedances: | 0
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Sand Crab Tissue Monitoring (SandCrabs) data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Diazinon.
Data Reference: | Final Data File used for assessment: SWAMP Sand Crab Tissue Data
Water Quality Objective/Criterion: | OEHHA Screening value for the protection of human health from the consumption of fish and shellfish. Brodberg and Pollock calculated "California Lakes Screening Values" for a 70 kg adult human and based on a fish consumption value of 21 g/day (1999)
Objective/Criterion Reference:
Evaluation Guideline: | OEHHA Screening Value in fish and shellfish tissue for Diazinon is 300.0 ug/Kg
Guideline Reference: | Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach (Avila Pier) was collected at 14 monitoring sites [ SCS02OOAB001 - Avila Beach at pier, SCS02OOAB002 - Avila Beach at pier, SCS02OOAB003 - Avila Beach 30E of pier, SCS02OOAB004 - Avila Beach 30E of pier, SCS02OOAB005 - Avila Beach 100E of pier, SCS02OOAB006 - Avila Beach 100E of pier, SCS02OOAB007 - Avila Beach 530E of pier, SCS02OOAB008 - Avila Beach 530E of pier, SCS02OOAB009 - Avila Beach 10W of beach, SCS02OOAB010 - Avila Beach 10W of beach, SCS02OOAB011 - Avila Beach 100W of beach, SCS02OOAB012 - Avila Beach 100W of beach, SCS02OOAB013 - Avila Beach 250W of pier, SCS02OOAB014 - Avila Beach 250W of pier]
Temporal Representation: | Data was collected on a single day 8/26/2002.
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are not included in data submission.
QAPP Information Reference(s):

DECISION ID | 10443
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
Weight of Evidence: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. None 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. For both lines of evidence zero of 15 samples exceeded the evaluation guideline (Brodberg and Pollock 1999) as it applies to both Shellfish Harvesting and Commercial or Recreational Fishing as beneficial uses. This does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation: |
USEPA Decision: |

Lines of Evidence (LOEs) for Decision ID 10443

LOE ID: | 14896
Pollutant: | Dieldrin
LOE Subgroup: | Pollutant-Tissue
Matrix: | Tissue
Fraction: | None
Beneficial Use: | Shellfish Harvesting
Number of Samples: | 15
Number of Exceedances: | 0
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Sand Crab Tissue Monitoring (SandCrabs) data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Dieldrin.
Data Reference: | Final Data File used for assessment: SWAMP Sand Crab Tissue Data
Water Quality Objective/Criterion: | OEHHA Screening value for the protection of human health from the consumption of fish and shellfish. Brodberg and Pollock calculated "California Lakes Screening Values" for a 70 kg adult human and based on a fish consumption value of 21 g/day (1999)
Objective/Criterion Reference:
Evaluation Guideline: | OEHHA Screening Value in fish and shellfish tissue for Dieldrin is 2.0 ug/Kg
Guideline Reference: | Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach (Avila Pier) was collected at 14 monitoring sites [ SCS02OOAB001 - Avila Beach at pier, SCS02OOAB002 - Avila Beach at pier, SCS02OOAB003 - Avila Beach 30E of pier, SCS02OOAB004 - Avila Beach 30E of pier, SCS02OOAB005 - Avila Beach 100E of pier, SCS02OOAB006 - Avila Beach 100E of pier, SCS02OOAB007 - Avila Beach 530E of pier, SCS02OOAB008 - Avila Beach 530E of pier, SCS02OOAB009 - Avila Beach 10W of beach, SCS02OOAB010 - Avila Beach 10W of beach, SCS02OOAB011 - Avila Beach 100W of beach, SCS02OOAB012 - Avila Beach 100W of beach, SCS02OOAB013 - Avila Beach 250W of pier, SCS02OOAB014 - Avila Beach 250W of pier]
Temporal Representation: | Data was collected on a single day 8/26/2002.
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are not included in data submission.
QAPP Information Reference(s):
LOE ID: | 14895
Pollutant: | Dieldrin
LOE Subgroup: | Pollutant-Tissue
Matrix: | Tissue
Fraction: | None
Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples: | 15
Number of Exceedances: | 0
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Sand Crab Tissue Monitoring (SandCrabs) data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Dieldrin.
Data Reference: | Final Data File used for assessment: SWAMP Sand Crab Tissue Data
Water Quality Objective/Criterion: | A water segment shall be placed on the section 303(d) list if the tissue pollutant levels in organisms exceed a pollutant-specific evaluation guideline (OEHHA or EPA) using the binomial distribution as described in section 3.1 (Water Quality Control Policy, SWRCB 2004)
Objective/Criterion Reference: | Water Quality Control Plan Central Coast Region (R3) Basin Plan
Evaluation Guideline: | For the protection of human health from the consumption of fish and shellfish, the OEHHA screening value for Dieldrin is 2.0 ug/Kg wet weight (Brodberg and Pollock 1999)
Guideline Reference: | Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach (Avila Pier) was collected at 14 monitoring sites [ SCS02OOAB001 - Avila Beach at pier, SCS02OOAB002 - Avila Beach at pier, SCS02OOAB003 - Avila Beach 30E of pier, SCS02OOAB004 - Avila Beach 30E of pier, SCS02OOAB005 - Avila Beach 100E of pier, SCS02OOAB006 - Avila Beach 100E of pier, SCS02OOAB007 - Avila Beach 530E of pier, SCS02OOAB008 - Avila Beach 530E of pier, SCS02OOAB009 - Avila Beach 10W of beach, SCS02OOAB010 - Avila Beach 10W of beach, SCS02OOAB011 - Avila Beach 100W of beach, SCS02OOAB012 - Avila Beach 100W of beach, SCS02OOAB013 - Avila Beach 250W of pier, SCS02OOAB014 - Avila Beach 250W of pier]
Temporal Representation: | Data was collected on a single day 8/26/2002.
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are not included in data submission.
QAPP Information Reference(s):

DECISION ID | 10444
Pollutant: | Endosulfan
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: | New Decision
Revision Status | Revised
Impairment from Pollutant or Pollution: | Pollutant
Weight of Evidence: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None 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 15 samples exceeded the evaluation guideline (Brodberg and Pollock 1999) as it applies to both Shellfish Harvesting and Commercial or Recreational Fishing as beneficial uses. This does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation: |
USEPA Decision: |

Lines of Evidence (LOEs) for Decision ID 10444

LOE ID: | 14916
Pollutant: | Endosulfan
LOE Subgroup: | Pollutant-Tissue
Matrix: | Tissue
Fraction: | None
Beneficial Use: | Shellfish Harvesting
Number of Samples: | 15
Number of Exceedances: | 0
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Sand Crab Tissue Monitoring (SandCrabs) data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Endosulfan I.
Data Reference: | Final Data File used for assessment: SWAMP Sand Crab Tissue Data
Water Quality Objective/Criterion: | OEHHA Screening value for the protection of human health from the consumption of fish and shellfish. Brodberg and Pollock calculated "California Lakes Screening Values" for a 70 kg adult human and based on a fish consumption value of 21 g/day (1999)
Objective/Criterion Reference:
Evaluation Guideline: | OEHHA Screening Value in fish and shellfish tissue for Endoculfan is 20000.0 ug/Kg
Guideline Reference: | Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach (Avila Pier) was collected at 14 monitoring sites [ SCS02OOAB001 - Avila Beach at pier, SCS02OOAB002 - Avila Beach at pier, SCS02OOAB003 - Avila Beach 30E of pier, SCS02OOAB004 - Avila Beach 30E of pier, SCS02OOAB005 - Avila Beach 100E of pier, SCS02OOAB006 - Avila Beach 100E of pier, SCS02OOAB007 - Avila Beach 530E of pier, SCS02OOAB008 - Avila Beach 530E of pier, SCS02OOAB009 - Avila Beach 10W of beach, SCS02OOAB010 - Avila Beach 10W of beach, SCS02OOAB011 - Avila Beach 100W of beach, SCS02OOAB012 - Avila Beach 100W of beach, SCS02OOAB013 - Avila Beach 250W of pier, SCS02OOAB014 - Avila Beach 250W of pier]
Temporal Representation: | Data was collected on a single day 8/26/2002.
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are not included in data submission.
QAPP Information Reference(s):

DECISION ID | 10445
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
Weight of Evidence: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. None 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. For both lines of evidence zero of 15 samples exceeded the evaluation guideline (Brodberg and Pollock 1999) as it applies to both Shellfish Harvesting and Commercial or Recreational Fishing as beneficial uses. This does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation: |
USEPA Decision: |

Lines of Evidence (LOEs) for Decision ID 10445

LOE ID: | 14935
Pollutant: | Endrin
LOE Subgroup: | Pollutant-Tissue
Matrix: | Tissue
Fraction: | None
Beneficial Use: | Shellfish Harvesting
Number of Samples: | 15
Number of Exceedances: | 0
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Sand Crab Tissue Monitoring (SandCrabs) data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Endrin.
Data Reference: | Final Data File used for assessment: SWAMP Sand Crab Tissue Data
Water Quality Objective/Criterion: | OEHHA Screening value for the protection of human health from the consumption of fish and shellfish. Brodberg and Pollock calculated "California Lakes Screening Values" for a 70 kg adult human and based on a fish consumption value of 21 g/day (1999)
Objective/Criterion Reference:
Evaluation Guideline: | OEHHA Screening Value in fish and shellfish tissue for Endrin is 1000.0 ug/Kg
Guideline Reference: | Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach (Avila Pier) was collected at 14 monitoring sites [ SCS02OOAB001 - Avila Beach at pier, SCS02OOAB002 - Avila Beach at pier, SCS02OOAB003 - Avila Beach 30E of pier, SCS02OOAB004 - Avila Beach 30E of pier, SCS02OOAB005 - Avila Beach 100E of pier, SCS02OOAB006 - Avila Beach 100E of pier, SCS02OOAB007 - Avila Beach 530E of pier, SCS02OOAB008 - Avila Beach 530E of pier, SCS02OOAB009 - Avila Beach 10W of beach, SCS02OOAB010 - Avila Beach 10W of beach, SCS02OOAB011 - Avila Beach 100W of beach, SCS02OOAB012 - Avila Beach 100W of beach, SCS02OOAB013 - Avila Beach 250W of pier, SCS02OOAB014 - Avila Beach 250W of pier]
Temporal Representation: | Data was collected on a single day 8/26/2002.
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are not included in data submission.
QAPP Information Reference(s):
LOE ID: | 14934
Pollutant: | Endrin
LOE Subgroup: | Pollutant-Tissue
Matrix: | Tissue
Fraction: | None
Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples: | 15
Number of Exceedances: | 0
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Sand Crab Tissue Monitoring (SandCrabs) data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Endrin.
Data Reference: | Final Data File used for assessment: SWAMP Sand Crab Tissue Data
Water Quality Objective/Criterion: | A water segment shall be placed on the section 303(d) list if the tissue pollutant levels in organisms exceed a pollutant-specific evaluation guideline (OEHHA or EPA) using the binomial distribution as described in section 3.1 (Water Quality Control Policy, SWRCB 2004)
Objective/Criterion Reference: | Water Quality Control Policy For Developing California's Clean Water Act Section 303(d) List. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency.
Evaluation Guideline: | For the protection of human health from the consumption of fish and shellfish, the OEHHA screening value for Endrin is 1,000 ug/Kg wet weight (Brodberg and Pollock 1999)
Guideline Reference: | Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach (Avila Pier) was collected at 14 monitoring sites [ SCS02OOAB001 - Avila Beach at pier, SCS02OOAB002 - Avila Beach at pier, SCS02OOAB003 - Avila Beach 30E of pier, SCS02OOAB004 - Avila Beach 30E of pier, SCS02OOAB005 - Avila Beach 100E of pier, SCS02OOAB006 - Avila Beach 100E of pier, SCS02OOAB007 - Avila Beach 530E of pier, SCS02OOAB008 - Avila Beach 530E of pier, SCS02OOAB009 - Avila Beach 10W of beach, SCS02OOAB010 - Avila Beach 10W of beach, SCS02OOAB011 - Avila Beach 100W of beach, SCS02OOAB012 - Avila Beach 100W of beach, SCS02OOAB013 - Avila Beach 250W of pier, SCS02OOAB014 - Avila Beach 250W of pier]
Temporal Representation: | Data was collected on a single day 8/26/2002.
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are not included in data submission.
QAPP Information Reference(s):

DECISION ID | 10439
Pollutant: | Fecal Coliform
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: | New Decision
Revision Status | Revised
Impairment from Pollutant or Pollution: | Pollutant
Weight of Evidence: | This water segment-pollutant combination is being considered for placement on the section 303(d) list under section 3.3 of the Listing Policy. Under section 3.3 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this water segment-pollutant combination. Water Board staff assessed one data set against two different evaluation criteria (i.e. single sample maximum, geomean, and total to fecal ratio.). Seven of 110 samples exceeded the single sample maximum criterion and zero of 24 geomean assessments exceeded the geomean criterion. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Seven of 110 samples exceeded the single sample maximum criterion and zero of 24 geomean assessments exceeded the geomean criterion and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation: |
USEPA Decision: |

Lines of Evidence (LOEs) for Decision ID 10439

LOE ID: | 19205
Pollutant: | Fecal Coliform
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 110
Number of Exceedances: | 7
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 7 of 110 samples exceed the criterion for Coliform, Fecal.
Data Reference: | AB 411 Data for 2004
| AB 411 Data for 2005
| AB 411 Data for 2006
Water Quality Objective/Criterion: | California Ocean Plan (SWRCB 2005) states that the single sample maximum for fecal coliform shall not exceed 400 MPN/100 mL.
Objective/Criterion Reference: | Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach was collected at one AB411 monitoring site (AB8)
Temporal Representation: | Data was collected over the time period 1/4/2005 - 12/27/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year.
Environmental Conditions: |
QAPP Information: | QA information not available
QAPP Information Reference(s):
LOE ID: | 19204
Pollutant: | Fecal Coliform
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 24
Number of Exceedances: | 0
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 0 of 24 samples exceed the criterion for Coliform, Fecal.
Data Reference: | AB 411 Data for 2004
| AB 411 Data for 2005
| AB 411 Data for 2006
Water Quality Objective/Criterion: | California Ocean Plan (SWRCB 2005) states that the 30-day geometric mean for fecal coliform shall not exceed 200 MPN/100 mL.
Objective/Criterion Reference: | Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach was collected at one AB411 monitoring site (AB8)
Temporal Representation: | Data was collected over the time period 1/4/2005 - 12/27/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year and also targets storm water events.
Environmental Conditions: |
QAPP Information: | QA information not available
QAPP Information Reference(s):

DECISION ID | 10446
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
Weight of Evidence: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. None 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. For both lines of evidence zero of 15 samples exceeded the evaluation guideline (Brodberg and Pollock 1999) as it applies to both Shellfish Harvesting and Commercial or Recreational Fishing beneficial uses. This does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation: |
USEPA Decision: |

Lines of Evidence (LOEs) for Decision ID 10446

LOE ID: | 14955
Pollutant: | Heptachlor epoxide
LOE Subgroup: | Pollutant-Tissue
Matrix: | Tissue
Fraction: | None
Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples: | 15
Number of Exceedances: | 0
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Sand Crab Tissue Monitoring (SandCrabs) data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Heptachlor epoxide.
Data Reference: | Final Data File used for assessment: SWAMP Sand Crab Tissue Data
Water Quality Objective/Criterion: | A water segment shall be placed on the section 303(d) list if the tissue pollutant levels in organisms exceed a pollutant-specific evaluation guideline (OEHHA or EPA) using the binomial distribution as described in section 3.1 (Water Quality Control Policy, SWRCB 2004)
Objective/Criterion Reference: | Water Quality Control Plan Central Coast Region (R3) Basin Plan
Evaluation Guideline: | For the protection of human health from the consumption of fish and shellfish, the OEHHA screening value for Total Heptachlor Epoxide is 4.0 ug/Kg wet weight (Brodberg and Pollock 1999)
Guideline Reference: | Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach (Avila Pier) was collected at 14 monitoring sites [ SCS02OOAB001 - Avila Beach at pier, SCS02OOAB002 - Avila Beach at pier, SCS02OOAB003 - Avila Beach 30E of pier, SCS02OOAB004 - Avila Beach 30E of pier, SCS02OOAB005 - Avila Beach 100E of pier, SCS02OOAB006 - Avila Beach 100E of pier, SCS02OOAB007 - Avila Beach 530E of pier, SCS02OOAB008 - Avila Beach 530E of pier, SCS02OOAB009 - Avila Beach 10W of beach, SCS02OOAB010 - Avila Beach 10W of beach, SCS02OOAB011 - Avila Beach 100W of beach, SCS02OOAB012 - Avila Beach 100W of beach, SCS02OOAB013 - Avila Beach 250W of pier, SCS02OOAB014 - Avila Beach 250W of pier]
Temporal Representation: | Data was collected on a single day 8/26/2002.
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are not included in data submission.
QAPP Information Reference(s):
LOE ID: | 14956
Pollutant: | Heptachlor epoxide
LOE Subgroup: | Pollutant-Tissue
Matrix: | Tissue
Fraction: | None
Beneficial Use: | Shellfish Harvesting
Number of Samples: | 15
Number of Exceedances: | 0
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Sand Crab Tissue Monitoring (SandCrabs) data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Heptachlor epoxide.
Data Reference: | Final Data File used for assessment: SWAMP Sand Crab Tissue Data
Water Quality Objective/Criterion: | OEHHA Screening value for the protection of human health from the consumption of fish and shellfish. Brodberg and Pollock calculated "California Lakes Screening Values" for a 70 kg adult human and based on a fish consumption value of 21 g/day (1999)
Objective/Criterion Reference:
Evaluation Guideline: | OEHHA Screening Value in fish and shellfish tissue for Heptachlor Epoxide is 4.0 ug/Kg
Guideline Reference: | Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach (Avila Pier) was collected at 14 monitoring sites [ SCS02OOAB001 - Avila Beach at pier, SCS02OOAB002 - Avila Beach at pier, SCS02OOAB003 - Avila Beach 30E of pier, SCS02OOAB004 - Avila Beach 30E of pier, SCS02OOAB005 - Avila Beach 100E of pier, SCS02OOAB006 - Avila Beach 100E of pier, SCS02OOAB007 - Avila Beach 530E of pier, SCS02OOAB008 - Avila Beach 530E of pier, SCS02OOAB009 - Avila Beach 10W of beach, SCS02OOAB010 - Avila Beach 10W of beach, SCS02OOAB011 - Avila Beach 100W of beach, SCS02OOAB012 - Avila Beach 100W of beach, SCS02OOAB013 - Avila Beach 250W of pier, SCS02OOAB014 - Avila Beach 250W of pier]
Temporal Representation: | Data was collected on a single day 8/26/2002.
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are not included in data submission.
QAPP Information Reference(s):

DECISION ID | 10447
Pollutant: | Hexachlorobenzene/ HCB
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: | New Decision
Revision Status | Revised
Impairment from Pollutant or Pollution: | Pollutant
Weight of Evidence: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. None 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. For both lines of evidence zero of 15 samples exceeded the evaluation guideline (Brodberg and Pollock 1999) as it applies to both Shellfish Harvesting and Commercial or Recreational Fishing as beneficial uses. This does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation: |
USEPA Decision: |

Lines of Evidence (LOEs) for Decision ID 10447

LOE ID: | 14975
Pollutant: | Hexachlorobenzene/ HCB
LOE Subgroup: | Pollutant-Tissue
Matrix: | Tissue
Fraction: | None
Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples: | 15
Number of Exceedances: | 0
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Sand Crab Tissue Monitoring (SandCrabs) data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Hexachlorobenzene.
Data Reference: | Final Data File used for assessment: SWAMP Sand Crab Tissue Data
Water Quality Objective/Criterion: | A water segment shall be placed on the section 303(d) list if the tissue pollutant levels in organisms exceed a pollutant-specific evaluation guideline (OEHHA or EPA) using the binomial distribution as described in section 3.1 (Water Quality Control Policy, SWRCB 2004)
Objective/Criterion Reference: | Water Quality Control Plan Central Coast Region (R3) Basin Plan
Evaluation Guideline: | For the protection of human health from the consumption of fish and shellfish, the OEHHA screening value for Total Hexachlorobenzene is 20 ug/Kg wet weight (Brodberg and Pollock 1999)
Guideline Reference: | Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach (Avila Pier) was collected at 14 monitoring sites [ SCS02OOAB001 - Avila Beach at pier, SCS02OOAB002 - Avila Beach at pier, SCS02OOAB003 - Avila Beach 30E of pier, SCS02OOAB004 - Avila Beach 30E of pier, SCS02OOAB005 - Avila Beach 100E of pier, SCS02OOAB006 - Avila Beach 100E of pier, SCS02OOAB007 - Avila Beach 530E of pier, SCS02OOAB008 - Avila Beach 530E of pier, SCS02OOAB009 - Avila Beach 10W of beach, SCS02OOAB010 - Avila Beach 10W of beach, SCS02OOAB011 - Avila Beach 100W of beach, SCS02OOAB012 - Avila Beach 100W of beach, SCS02OOAB013 - Avila Beach 250W of pier, SCS02OOAB014 - Avila Beach 250W of pier]
Temporal Representation: | Data was collected on a single day 8/26/2002.
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are not included in data submission.
QAPP Information Reference(s):
LOE ID: | 14976
Pollutant: | Hexachlorobenzene/ HCB
LOE Subgroup: | Pollutant-Tissue
Matrix: | Tissue
Fraction: | None
Beneficial Use: | Shellfish Harvesting
Number of Samples: | 15
Number of Exceedances: | 0
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Sand Crab Tissue Monitoring (SandCrabs) data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Hexachlorobenzene.
Data Reference: | Final Data File used for assessment: SWAMP Sand Crab Tissue Data
Water Quality Objective/Criterion: | OEHHA Screening value for the protection of human health from the consumption of fish and shellfish. Brodberg and Pollock calculated "California Lakes Screening Values" for a 70 kg adult human and based on a fish consumption value of 21 g/day (1999)
Objective/Criterion Reference:
Evaluation Guideline: | OEHHA Screening Value in fish and shellfish tissue for Hexachlorobenzene is 20.0 ug/Kg
Guideline Reference: | Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach (Avila Pier) was collected at 14 monitoring sites [ SCS02OOAB001 - Avila Beach at pier, SCS02OOAB002 - Avila Beach at pier, SCS02OOAB003 - Avila Beach 30E of pier, SCS02OOAB004 - Avila Beach 30E of pier, SCS02OOAB005 - Avila Beach 100E of pier, SCS02OOAB006 - Avila Beach 100E of pier, SCS02OOAB007 - Avila Beach 530E of pier, SCS02OOAB008 - Avila Beach 530E of pier, SCS02OOAB009 - Avila Beach 10W of beach, SCS02OOAB010 - Avila Beach 10W of beach, SCS02OOAB011 - Avila Beach 100W of beach, SCS02OOAB012 - Avila Beach 100W of beach, SCS02OOAB013 - Avila Beach 250W of pier, SCS02OOAB014 - Avila Beach 250W of pier]
Temporal Representation: | Data was collected on a single day 8/26/2002.
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are not included in data submission.
QAPP Information Reference(s):

DECISION ID | 10448
Pollutant: | Mirex
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: | New Decision
Revision Status | Revised
Impairment from Pollutant or Pollution: | Pollutant
Weight of Evidence: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the Evaluation Guideline, USEPA 2000. 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. For both lines of evidence zero of 15 samples exceeded the evaluation guideline (USEPA 2000) as it applies to both Shellfish Harvesting and Commercial or Recreational Fishing as beneficial uses. This does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation: |
USEPA Decision: |

Lines of Evidence (LOEs) for Decision ID 10448

LOE ID: | 14996
Pollutant: | Mirex
LOE Subgroup: | Pollutant-Tissue
Matrix: | Tissue
Fraction: | None
Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples: | 15
Number of Exceedances: | 0
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Sand Crab Tissue Monitoring (SandCrabs) data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Mirex.
Data Reference: | Final Data File used for assessment: SWAMP Sand Crab Tissue Data
Water Quality Objective/Criterion: | A water segment shall be placed on the section 303(d) list if the tissue pollutant levels in organisms exceed a pollutant-specific evaluation guideline (OEHHA or EPA) using the binomial distribution as described in section 3.1 (Water Quality Control Policy, SWRCB 2004)
Objective/Criterion Reference: | Water Quality Control Policy For Developing California's Clean Water Act Section 303(d) List. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency.
Evaluation Guideline: | For the protection of human health from the consumption of fish and shellfish, the EPA screening value for Mirex is 800 ug/Kg wet weight (USEPA 2000)
Guideline Reference: | Guidance for assessing chemical contaminant data for use in fish advisories. Vol. 1: Fish sampling and analysis. Third Edition. EPA823-B-00-007. Washington, D.C.: Office of Water, USEPA
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach (Avila Pier) was collected at 14 monitoring sites [ SCS02OOAB001 - Avila Beach at pier, SCS02OOAB002 - Avila Beach at pier, SCS02OOAB003 - Avila Beach 30E of pier, SCS02OOAB004 - Avila Beach 30E of pier, SCS02OOAB005 - Avila Beach 100E of pier, SCS02OOAB006 - Avila Beach 100E of pier, SCS02OOAB007 - Avila Beach 530E of pier, SCS02OOAB008 - Avila Beach 530E of pier, SCS02OOAB009 - Avila Beach 10W of beach, SCS02OOAB010 - Avila Beach 10W of beach, SCS02OOAB011 - Avila Beach 100W of beach, SCS02OOAB012 - Avila Beach 100W of beach, SCS02OOAB013 - Avila Beach 250W of pier, SCS02OOAB014 - Avila Beach 250W of pier]
Temporal Representation: | Data was collected on a single day 8/26/2002.
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are not included in data submission.
QAPP Information Reference(s):
LOE ID: | 15011
Pollutant: | Mirex
LOE Subgroup: | Pollutant-Tissue
Matrix: | Tissue
Fraction: | None
Beneficial Use: | Shellfish Harvesting
Number of Samples: | 15
Number of Exceedances: | 0
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Sand Crab Tissue Monitoring (SandCrabs) data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Mirex.
Data Reference: | Final Data File used for assessment: SWAMP Sand Crab Tissue Data
Water Quality Objective/Criterion: | USEPA Recommended Screening Values for target analytes - recreational fishers (Table 5-3 in USEPA 2000 (page 5-11)).
Objective/Criterion Reference:
Evaluation Guideline: | USEPA Screening Value in fish and shellfish tissue for Mirex is 800.0 ug/Kg
Guideline Reference: | Guidance for assessing chemical contaminant data for use in fish advisories. Vol. 1: Fish sampling and analysis. Third Edition. EPA823-B-00-007. Washington, D.C.: Office of Water, USEPA
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach (Avila Pier) was collected at 14 monitoring sites [ SCS02OOAB001 - Avila Beach at pier, SCS02OOAB002 - Avila Beach at pier, SCS02OOAB003 - Avila Beach 30E of pier, SCS02OOAB004 - Avila Beach 30E of pier, SCS02OOAB005 - Avila Beach 100E of pier, SCS02OOAB006 - Avila Beach 100E of pier, SCS02OOAB007 - Avila Beach 530E of pier, SCS02OOAB008 - Avila Beach 530E of pier, SCS02OOAB009 - Avila Beach 10W of beach, SCS02OOAB010 - Avila Beach 10W of beach, SCS02OOAB011 - Avila Beach 100W of beach, SCS02OOAB012 - Avila Beach 100W of beach, SCS02OOAB013 - Avila Beach 250W of pier, SCS02OOAB014 - Avila Beach 250W of pier]
Temporal Representation: | Data was collected on a single day 8/26/2002.
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are not included in data submission.
QAPP Information Reference(s):

DECISION ID | 10437
Pollutant: | Total Coliform
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: | New Decision
Revision Status | Revised
Impairment from Pollutant or Pollution: | Pollutant
Weight of Evidence: | This water segment-pollutant combination is being considered for placement on the section 303(d) list under section 3.3 of the Listing Policy. Under section 3.3 a single line of evidence is necessary to assess listing status. Three lines of evidence are available in the administrative record to assess this water segment-pollutant combination. Water Board staff assessed one data set against three different evaluation criteria (i.e. single sample maximum, geomean, and total to fecal ratio). Five of 110 samples exceeded the single sample maximum criterion, two of 23 geomean assessments exceeded the geomean criterion, and two of 110 sample ratios exceeded the total to fecal ratio criterion. 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. Five of 110 samples exceeded the single sample maximum criterion, two of 23 geomean assessments exceeded the geomean criterion, and two of 110 sample ratio exceeded the total to fecal ratio criterion and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation: |
USEPA Decision: |

Lines of Evidence (LOEs) for Decision ID 10437

LOE ID: | 19209
Pollutant: | Total Coliform
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 24
Number of Exceedances: | 2
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 2 of 24 samples exceed the criterion for Coliform, Total.
Data Reference: | AB 411 Data for 2004
| AB 411 Data for 2005
| AB 411 Data for 2006
Water Quality Objective/Criterion: | California Ocean Plan (2005) 30-day geometric mean standard for total coliform states that total coliform density shall not exceed 1,000 MPN/100 mL.
Objective/Criterion Reference: | Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach was collected at one monitoring site (AB8)
Temporal Representation: | Data was collected over the time period 1/4/2005 - 12/27/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year.
Environmental Conditions: |
QAPP Information: | QA information not available
QAPP Information Reference(s):
LOE ID: | 19208
Pollutant: | Total Coliform
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 110
Number of Exceedances: | 5
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 5 of 110 samples exceed the criterion for Coliform, Total.
Data Reference: | AB 411 Data for 2004
| AB 411 Data for 2005
| AB 411 Data for 2006
Water Quality Objective/Criterion: | California Ocean Plan (2005) single sample maximum states that total coliform density shall not exceed 10,000 MPN/100 mL.
Objective/Criterion Reference: | Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach was collected at one monitoring site (AB8)
Temporal Representation: | Data was collected over the time period 1/4/2005 - 12/27/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year.
Environmental Conditions: |
QAPP Information: | QA information not available
QAPP Information Reference(s):
LOE ID: | 19210
Pollutant: | Total Coliform
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 110
Number of Exceedances: | 2
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 2 of 110 samples exceed the criterion for Coliform, Total.
Data Reference: | AB 411 Data for 2004
| AB 411 Data for 2005
| AB 411 Data for 2006
Water Quality Objective/Criterion: | California Ocean Plan (2005) single sample maximum standard for total coliform states that total coliform density shall not exceed 1,000 MPN/100 mL when the fecal coliform/total coliform ratio exceeds 0.1.
Objective/Criterion Reference: | Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach was collected at one monitoring site (AB8)
Temporal Representation: | Data was collected over the time period 1/4/2005 - 12/27/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year.
Environmental Conditions: |
QAPP Information: | QA information not available
QAPP Information Reference(s):

DECISION ID | 10449
Pollutant: | Toxaphene
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: | New Decision
Revision Status | Revised
Impairment from Pollutant or Pollution: | Pollutant
Weight of Evidence: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. None 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. For both lines of evidence zero of 15 samples exceeded the evaluation guideline (Brodberg and Pollock 1999) as it applies to both Shellfish Harvesting and Commercial or Recreational Fishing as beneficial uses. This does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation: |
USEPA Decision: |

Lines of Evidence (LOEs) for Decision ID 10449

LOE ID: | 15782
Pollutant: | Toxaphene
LOE Subgroup: | Pollutant-Tissue
Matrix: | Tissue
Fraction: | None
Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples: | 15
Number of Exceedances: | 0
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Sand Crab Tissue Monitoring (SandCrabs) data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Toxaphene.
Data Reference: | Final Data File used for assessment: SWAMP Sand Crab Tissue Data
Water Quality Objective/Criterion: | A water segment shall be placed on the section 303(d) list if the tissue pollutant levels in organisms exceed a pollutant-specific evaluation guideline (OEHHA or EPA) using the binomial distribution as described in section 3.1 (Water Quality Control Policy, SWRCB 2004)
Objective/Criterion Reference:
Evaluation Guideline: | For the protection of human health from the consumption of fish and shellfish, the OEHHA screening value for total Toxaphene is 30 ug/Kg wet weight (Brodberg and Pollock 1999)
Guideline Reference: | Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach (Avila Pier) was collected at 14 monitoring sites [ SCS02OOAB001 - Avila Beach at pier, SCS02OOAB002 - Avila Beach at pier, SCS02OOAB003 - Avila Beach 30E of pier, SCS02OOAB004 - Avila Beach 30E of pier, SCS02OOAB005 - Avila Beach 100E of pier, SCS02OOAB006 - Avila Beach 100E of pier, SCS02OOAB007 - Avila Beach 530E of pier, SCS02OOAB008 - Avila Beach 530E of pier, SCS02OOAB009 - Avila Beach 10W of beach, SCS02OOAB010 - Avila Beach 10W of beach, SCS02OOAB011 - Avila Beach 100W of beach, SCS02OOAB012 - Avila Beach 100W of beach, SCS02OOAB013 - Avila Beach 250W of pier, SCS02OOAB014 - Avila Beach 250W of pier]
Temporal Representation: | Data was collected on a single day 8/26/2002.
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are not included in data submission.
QAPP Information Reference(s):
LOE ID: | 15795
Pollutant: | Toxaphene
LOE Subgroup: | Pollutant-Tissue
Matrix: | Tissue
Fraction: | None
Beneficial Use: | Shellfish Harvesting
Number of Samples: | 15
Number of Exceedances: | 0
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Sand Crab Tissue Monitoring (SandCrabs) data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Toxaphene.
Data Reference: | Final Data File used for assessment: SWAMP Sand Crab Tissue Data
Water Quality Objective/Criterion: | OEHHA Screening value for the protection of human health from the consumption of fish and shellfish. Brodberg and Pollock calculated "California Lakes Screening Values" for a 70 kg adult human and based on a fish consumption value of 21 g/day (1999)
Objective/Criterion Reference:
Evaluation Guideline: | OEHHA Screening Value in fish and shellfish tissue for Toxaphene is 30.0 ug/Kg
Guideline Reference: | Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach (Avila Pier) was collected at 14 monitoring sites [ SCS02OOAB001 - Avila Beach at pier, SCS02OOAB002 - Avila Beach at pier, SCS02OOAB003 - Avila Beach 30E of pier, SCS02OOAB004 - Avila Beach 30E of pier, SCS02OOAB005 - Avila Beach 100E of pier, SCS02OOAB006 - Avila Beach 100E of pier, SCS02OOAB007 - Avila Beach 530E of pier, SCS02OOAB008 - Avila Beach 530E of pier, SCS02OOAB009 - Avila Beach 10W of beach, SCS02OOAB010 - Avila Beach 10W of beach, SCS02OOAB011 - Avila Beach 100W of beach, SCS02OOAB012 - Avila Beach 100W of beach, SCS02OOAB013 - Avila Beach 250W of pier, SCS02OOAB014 - Avila Beach 250W of pier]
Temporal Representation: | Data was collected on a single day 8/26/2002.
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are not included in data submission.
QAPP Information Reference(s):

DECISION ID | 10438
Pollutant: | Enterococcus
Final Listing Decision: | List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: | New Decision
Revision Status | Revised
Sources: | Source Unknown
Expected TMDL Completion Date: | 2021
Impairment from Pollutant or Pollution: | Pollutant
Weight of Evidence: | This water segment-pollutant combination is being considered for placement on the section 303(d) list under sections 2.1 and 3.3 of the Listing Policy. Two lines of evidence are available in the administrative record to assess this water segment-pollutant combination. Based on section 3.3 of the Listing Policy, the site exceeded numeric objectives for Enterococus geomean. Using the binomial distribution, waters shall be placed on the section 303(d) list if the number of measured exceedances supports rejection of the null hypothesis as presented in Table 3.2. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on Water Board 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. Five of 24 samples exceed the geomean criteria. Therefore, number of exceedances for this line of evidence exceeds the allowable frequency as listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
SWRCB Board Decision / Staff Recommendation: |
USEPA Decision: |

Lines of Evidence (LOEs) for Decision ID 10438

LOE ID: | 19207
Pollutant: | Enterococcus
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 111
Number of Exceedances: | 10
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 10 of 111 samples exceed the criterion for Enterococci.
Data Reference: | AB 411 Data for 2004
| AB 411 Data for 2005
| AB 411 Data for 2006
Water Quality Objective/Criterion: | California Ocean Plan (SWRCB 2005) states that the single sample maximum for Enterococcus shall not exceed 104 MPN/100 mL.
Objective/Criterion Reference: | Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach was collected at one AB411 monitoring site (AB8)
Temporal Representation: | Data was collected over the time period 1/4/2005 - 12/27/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year.
Environmental Conditions: |
QAPP Information: | QA information not available
QAPP Information Reference(s):
LOE ID: | 19206
Pollutant: | Enterococcus
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 24
Number of Exceedances: | 5
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed data for Pacific Ocean at Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: 5 of 24 samples exceed the criterion for Enterococci.
Data Reference: | AB 411 Data for 2004
| AB 411 Data for 2005
| AB 411 Data for 2006
Water Quality Objective/Criterion: | California Ocean Plan (SWRCB 2005) states that the geometric mean for Enterococcus shall not exceed 35 MPN/100 mL.
Objective/Criterion Reference: | Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach was collected at one AB411 monitoring site (AB8)
Temporal Representation: | Data was collected over the time period 1/4/2005 - 12/27/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year.
Environmental Conditions: |
QAPP Information: | QA information not available
QAPP Information Reference(s):

DECISION ID | 15571
Pollutant: | PCBs (Polychlorinated biphenyls)
Final Listing Decision: | List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: | New Decision
Revision Status | Revised
Sources: | Petroleum Activities
Expected TMDL Completion Date: | 2021
Impairment from Pollutant or Pollution: | Pollutant
Weight of Evidence: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. Sand crab samples were collected from each of fourteen sites along Avila Beach on a single sample date. Monitoring sites were spread out over 550m of beach, and therefore three of these sites are independent of each other based on the definition in the Listing Policy. The sum of three anachlors was calculated for each site and was compared to the OEHHA evaluation guideline for total PCBs in fish and shellfish. All 14 of the samples exceed the Evaluation Guideline OEHHA Screening Value. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. However, there are an insufficient number of samples to make a "use rating" decision. Central Coast Water Board staff require a minimum of 16 samples to make a "use rating" decision of Fully Supporting. 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 14 of the samples exceed the Evaluation Guideline OEHHA Screening Value and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
SWRCB Board Decision / Staff Recommendation: |
USEPA Decision: |

Lines of Evidence (LOEs) for Decision ID 15571

LOE ID: | 14942
Pollutant: | PCBs (Polychlorinated biphenyls)
LOE Subgroup: | Pollutant-Tissue
Matrix: | Tissue
Fraction: | None
Beneficial Use: | Shellfish Harvesting
Number of Samples: | 14
Number of Exceedances: | 14
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Sand Crab Tissue Monitoring (SandCrabs) data From fourteen distinct sampling locations along Avila Beach (Avila Pier) to determine beneficial use support and results are as follows: all 14 samples exceed the criterion for total PCBs. In all cased, anachlor 1254 exceded the evaluation guideline and results for anachlors 1248 and 1260 were non-detects.
Data Reference: | Final Data File used for assessment: SWAMP Sand Crab Tissue Data
Water Quality Objective/Criterion: |
Objective/Criterion Reference:
Evaluation Guideline: | OEHHA Screening Value in fish and shellfish tissue for Total PCBs is 20.0 ppb (ug/Kg or ng/g).
Guideline Reference: | Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Avila Beach (Avila Pier) was collected at 14 monitoring sites [ SCS02OOAB001 - Avila Beach at pier, SCS02OOAB002 - Avila Beach at pier, SCS02OOAB003 - Avila Beach 30E of pier, SCS02OOAB004 - Avila Beach 30E of pier, SCS02OOAB005 - Avila Beach 100E of pier, SCS02OOAB006 - Avila Beach 100E of pier, SCS02OOAB007 - Avila Beach 530E of pier, SCS02OOAB008 - Avila Beach 530E of pier, SCS02OOAB009 - Avila Beach 10W of beach, SCS02OOAB010 - Avila Beach 10W of beach, SCS02OOAB011 - Avila Beach 100W of beach, SCS02OOAB012 - Avila Beach 100W of beach, SCS02OOAB013 - Avila Beach 250W of pier, SCS02OOAB014 - Avila Beach 250W of pier]. Three of these sites are considered independent per the policy, as they are more than 200m apart.
Temporal Representation: | Data was collected on a single day 8/26/2002.
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data.
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are not included in data submission.
QAPP Information Reference(s):