Water Body Name: | Topanga Beach |
Water Body ID: | CAX4041300019990924081553 |
Water Body Type: | Coastal & Bay Shoreline |
DECISION ID |
32578 |
Region 4 |
Topanga Beach |
||
Pollutant: | Indicator Bacteria |
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 |
TMDL Name: | Santa Monica Bay Beach Closures/Coliform/Bacteria Indicators (48) |
TMDL Project Code: | 392 |
Date TMDL Approved by USEPA: | 06/19/2003 |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for removal from the CWA section 303(d) List under section 4.3 of the Listing Policy. Under section 4.3 a single line of evidence is necessary to assess listing status.
7 lines of evidence are available in the administrative record to assess this pollutant. 0 of 0 samples exceeded the OBJECTIVE. 284 of 1177 samples exceeded the OBJECTIVE. 513 of 1163 samples exceeded the OBJECTIVE. 193 of 1178 samples exceeded the OBJECTIVE. 245 of 1164 samples exceeded the OBJECTIVE. 77 of 1178 samples exceeded the OBJECTIVE. 316 of 1164 samples exceeded the OBJECTIVE. 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. 284 of 1177, 513 of 1163, 245 of 1164 and 316 of 1164 samples exceeded the OBJECTIVEs and this exceeds the allowable frequency listed in Table 4.2 of the Listing Policy. 4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met. |
Regional Board 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. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 3535 | ||||
Pollutant: | Coliform Bacteria | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Not Specified | ||||
Fraction: | None | ||||
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 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): | |||||
|
|||||
LOE ID: | 89063 | ||||
Pollutant: | Fecal Coliform | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 1178 | ||||
Number of Exceedances: | 193 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed BW data for Topanga Beach to determine beneficial use support and results are as follows: 193 of 1178 samples exceed the criterion for Coliform, Fecal. | ||||
Data Reference: | Data for Region 4 Beach Watch. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | California Ocean Plan (SWRCB 2009) single sample maximum states that fecal coliform density shall not exceed 400 per 100ml | ||||
Objective/Criterion Reference: | California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009 | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Topanga Beach was collected at 1 monitoring site [ Topanga Beach] | ||||
Temporal Representation: | Data was collected over the time period 1/1/2005-8/28/2010. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | The samples were collected for the Beach Watch program. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 89081 | ||||
Pollutant: | Total Coliform | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 1164 | ||||
Number of Exceedances: | 316 | ||||
Data and Information Type: | Not Specified | ||||
Data Used to Assess Water Quality: | Three hundred sixteen of the 1164 geomeans exceeded the total coliform objective. | ||||
Data Reference: | Data for Region 4 Beach Watch. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The geometric mean standard for total coliform states that the fecal coliform density shall not exceed 1000 per 100 mL. Water Quality Control Plan for Ocean Waters 2009. | ||||
Objective/Criterion Reference: | California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009 | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Samples were collected from Topanga Beach. | ||||
Temporal Representation: | Samples were collected approximately once a day from 2005 to 2010. | ||||
Environmental Conditions: | |||||
QAPP Information: | The samples were collected for the Beach Watch program. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 89080 | ||||
Pollutant: | Total Coliform | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 1178 | ||||
Number of Exceedances: | 77 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed BW data for Topanga Beach to determine beneficial use support and results are as follows: 77 of 1178 samples exceed the criterion for Coliform, Total. | ||||
Data Reference: | Data for Region 4 Beach Watch. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | California Ocean Plan (2009) single sample maximum states that total coliform density shall not exceed 10,000 per 100 mL | ||||
Objective/Criterion Reference: | California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009 | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Topanga Beach was collected at 1 monitoring site [ Topanga Beach] | ||||
Temporal Representation: | Data was collected over the time period 1/1/2005-8/28/2010. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | The samples were collected for the Beach Watch program. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 89062 | ||||
Pollutant: | Enterococcus | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 1163 | ||||
Number of Exceedances: | 513 | ||||
Data and Information Type: | Not Specified | ||||
Data Used to Assess Water Quality: | Five hundred thirteen of the 1163 geomeans exceeded the entercoccus objective. | ||||
Data Reference: | Data for Region 4 Beach Watch. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The geometric mean standard for entercoccus states that the fecal coliform density shall not exceed 35 per 100 mL. Water Quality Control Plan for Ocean Waters 2009. | ||||
Objective/Criterion Reference: | California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009 | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Samples were collected from Topanga Beach. | ||||
Temporal Representation: | Samples were collected approximately once a day from 2005 to 2010. | ||||
Environmental Conditions: | |||||
QAPP Information: | The samples were collected for the Beach Watch program. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 89061 | ||||
Pollutant: | Enterococcus | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 1177 | ||||
Number of Exceedances: | 284 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff assessed BW data for Topanga Beach to determine beneficial use support and results are as follows: 284 of 1177 samples exceed the criterion for Enterococci. | ||||
Data Reference: | Data for Region 4 Beach Watch. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | California Ocean Plan (SWRCB 2009) single sample maximum states that enterococcus density shall not exceed 104 per 100 mL. | ||||
Objective/Criterion Reference: | California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009 | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for Topanga Beach was collected at 1 monitoring site [ Topanga Beach] | ||||
Temporal Representation: | Data was collected over the time period 1/1/2005-8/28/2010. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | The samples were collected for the Beach Watch program. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 89064 | ||||
Pollutant: | Fecal Coliform | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 1164 | ||||
Number of Exceedances: | 245 | ||||
Data and Information Type: | Not Specified | ||||
Data Used to Assess Water Quality: | Two hundred fifty four of the 1164 geomeans exceeded the fecal coliform objective. | ||||
Data Reference: | Data for Region 4 Beach Watch. | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The geometric mean standard for fecal coliform states that the fecal coliform density shall not exceed 200 per 100 mL. Water Quality Control Plan for Ocean Waters 2009. | ||||
Objective/Criterion Reference: | California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009 | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Samples were collected from Topanga Beach. | ||||
Temporal Representation: | Samples were collected approximately once a day from 2005 to 2010. | ||||
Environmental Conditions: | |||||
QAPP Information: | The samples were collected for the Beach Watch program. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
36309 |
Region 4 |
Topanga Beach |
||
Pollutant: | DDT (Dichlorodiphenyltrichloroethane) |
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 (TMDL required list)(2012) |
Revision Status | Revised |
Sources: | Source Unknown |
TMDL Name: | Santa Monica Bay Historic Pesticides (58) |
TMDL Project Code: | 397 |
Date TMDL Approved by USEPA: | 03/26/2012 |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | 303(d) listing decisions made prior to 2006 were not held in an assessment database.
There is sufficient justification to place 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 Santa Monica Bay DDT and PCB TMDL was approved by USEPA on 03/26/2012. |
Regional Board 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. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 4171 | ||||
Pollutant: | DDT (Dichlorodiphenyltrichloroethane) | ||||
LOE Subgroup: | Pollutant-Tissue | ||||
Matrix: | Tissue | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Not Specified | ||||
Data Used to Assess Water Quality: | Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006. | ||||
Data Reference: | Placeholder reference pre-2006 303(d) | ||||
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 |
34157 |
Region 4 |
Topanga Beach |
||
Pollutant: | PCBs (Polychlorinated biphenyls) |
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 (TMDL required list)(2012) |
Revision Status | Revised |
Sources: | Source Unknown |
TMDL Name: | Santa Monica Bay Historic Pesticides (58) |
TMDL Project Code: | 397 |
Date TMDL Approved by USEPA: | 03/26/2012 |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | 303(d) listing decisions made prior to 2006 were not held in an assessment database.
There is sufficient justification to place 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 Santa Monica Bay DDT and PCB TMDL was approved by USEPA on 03/26/2012. |
Regional Board 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. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 4172 | ||||
Pollutant: | PCBs (Polychlorinated biphenyls) | ||||
LOE Subgroup: | Pollutant-Tissue | ||||
Matrix: | Tissue | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Not Specified | ||||
Data Used to Assess Water Quality: | Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006. | ||||
Data Reference: | Placeholder reference pre-2006 303(d) | ||||
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 |
34301 |
Region 4 |
Topanga Beach |
||
Pollutant: | Beach Closures |
Final Listing Decision: | Delist from 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Delist from 303(d) list (TMDL required list)(2012) |
Revision Status | Original |
Reason for Delisting: | Flaws in original listing |
Impairment from Pollutant or Pollution: | Pollution |
Regional Board Conclusion: | This pollutant is being considered for removal from the section 303(d) list under section 4 of the Listing Policy. Under this section of the Policy, a minimum of one line of evidence is needed to assess listing status.
The original line of evidence supporting the listing does not identify a pollutant but rather, a condition caused by a pollutant(s) (beach closures). The dry weather TMDL was approved by the RWQCB on 1/24/02, and the wet weather TMDL was approved on 12/12/04, and subsequently approved by USEPA on 6/19/03. These TMDLs are expected to address this water body condition. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of removing these listing from the 303(d) list because beach closures are not pollutants. Beach closure information should not be placed on the section 303(d) list because it is not a pollutant or toxicity (section 2 of the Listing Policy). |
Regional Board Decision Recommendation: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 3534 | ||||
Pollutant: | Beach Closures | ||||
LOE Subgroup: | Narrative Description Data | ||||
Matrix: | Not Specified | ||||
Fraction: | None | ||||
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: | A TMDL and implementation plan has been approved for this water segment-pollutant combination. The Santa Monica Bay Bacteria Dry Weather TMDL was approved by RWQCB on January 24, 2002 and subsequently approved by USEPA. The Santa Monica Bay Bacteria Wet Weather TMDL was approved by RWQCB on December 12, 2002 and approved by USEPA on June 19, 2003. | ||||
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): | |||||