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DECISION ID |
10781 |
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Pollutant: |
Total Coliform |
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: |
2013 |
Impairment from Pollutant or Pollution: |
Pollutant |
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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 water quality objective set to protect for Water Contact Recreation (i.e. single sample maximum, geomean, and total to fecal ratio). Nine of 150 samples exceeded the single sample maximum Objective for Water Contact Recreation, two of 32 geomean assessments exceeded the geomean Objective for Water Contact Recreation, and zero of 149 sample ratio exceeded the total to fecal ratio Objective for Water Contact Recreation.
However, Water Board staff also assessed this same data compared to the Ocean Plan Objective for Shellfish Harvesting and 48 of 150 samples exceeded this water quality objective.
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 due to exceedances of the Ocean Plan Objective for Shellfish Harvesting.
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. Forty-eight of 150 samples exceeded the Ocean Plan Objective for Shellfish Harvesting and this exceeds the allowable frequency listed in Table 3.2 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
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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. |
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SWRCB Board Decision / Staff Recommendation: |
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USEPA Decision: |
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LOE ID: |
25356 |
|
Pollutant: |
Total Coliform |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
None |
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Beneficial Use: |
Commercial or recreational collection of fish, shellfish, or organisms |
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Number of Samples: |
150 |
Number of Exceedances: |
48 |
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Data and Information Type: |
Not Specified |
Data Used to Assess Water Quality: |
Data for this line of evidence was collected at Pacific Ocean at Hammonds Beach (Santa Barbara County) at one AB 411 site (Hammonds Beach) weekly between January 2004 and December 2006. Forty-eight of 150 samples exceed the Ocean Plan Objective for Shellfish Harvesting. |
Data Reference: |
AB 411 Data for 2004 |
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AB 411 Data for 2005 |
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AB 411 Data for 2006 |
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Water Quality Objective/Criterion: |
California Ocean Plan (SWRCB 2005) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 ml. |
Objective/Criterion Reference: |
Water Quality Control Plan Central Coast Region (R3) Basin Plan |
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Evaluation Guideline: |
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Guideline Reference: |
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Spatial Representation: |
Data for this line of evidence was collected at Pacific Ocean at Hammonds Beach (Santa Barbara County) at one AB 411 site (Hammonds Beach) |
Temporal Representation: |
Data was collected over the time period 1/5/2004 - 12/27/2006 |
Environmental Conditions: |
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QAPP Information: |
No QA information available |
QAPP Information Reference(s): |
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LOE ID: |
19250 |
|
Pollutant: |
Total Coliform |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
None |
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Beneficial Use: |
Water Contact Recreation |
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Number of Samples: |
150 |
Number of Exceedances: |
9 |
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Data and Information Type: |
PATHOGEN MONITORING |
Data Used to Assess Water Quality: |
Central Coast Regional Board Staff assessed data for Pacific Ocean at Hammonds Beach (Santa Barbara County) to determine beneficial use support and results are as follows: 9 of 150 samples exceed the criterion for Coliform, Total. |
Data Reference: |
AB 411 Data for 2004 |
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AB 411 Data for 2005 |
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AB 411 Data for 2006 |
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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 |
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Evaluation Guideline: |
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Guideline Reference: |
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Spatial Representation: |
Data for this line of evidence for Pacific Ocean at Hammonds Beach (Santa Barbara County) was collected at one monitoring site (Hammonds) |
Temporal Representation: |
Data was collected over the time period 1/5/2004 - 12/27/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year. |
Environmental Conditions: |
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QAPP Information: |
QA information not available |
QAPP Information Reference(s): |
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LOE ID: |
19311 |
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Pollutant: |
Total Coliform |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
None |
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Beneficial Use: |
Water Contact Recreation |
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Number of Samples: |
32 |
Number of Exceedances: |
2 |
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Data and Information Type: |
PATHOGEN MONITORING |
Data Used to Assess Water Quality: |
Central Coast Regional Board Staff assessed data for Pacific Ocean at Hammonds Beach (Santa Barbara County) to determine beneficial use support and results are as follows: 2 of 32 samples exceed the criterion for Coliform, Total. |
Data Reference: |
AB 411 Data for 2004 |
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AB 411 Data for 2005 |
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AB 411 Data for 2006 |
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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 |
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Evaluation Guideline: |
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Guideline Reference: |
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Spatial Representation: |
Data for this line of evidence for Pacific Ocean at Hammonds Beach (Santa Barbara County) was collected at one monitoring site (Hammonds) |
Temporal Representation: |
Data was collected over the time period 1/5/2004 - 12/27/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year. |
Environmental Conditions: |
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QAPP Information: |
QA information not available |
QAPP Information Reference(s): |
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LOE ID: |
19312 |
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Pollutant: |
Total Coliform |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
None |
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Beneficial Use: |
Water Contact Recreation |
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Number of Samples: |
149 |
Number of Exceedances: |
0 |
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Data and Information Type: |
PATHOGEN MONITORING |
Data Used to Assess Water Quality: |
Central Coast Regional Board Staff assessed data for Pacific Ocean at Hammonds Beach (Santa Barbara County) to determine beneficial use support and results are as follows: 0 of 149 samples exceed the criterion for Coliform, Total. |
Data Reference: |
AB 411 Data for 2004 |
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AB 411 Data for 2005 |
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AB 411 Data for 2006 |
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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 |
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Evaluation Guideline: |
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Guideline Reference: |
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Spatial Representation: |
Data for this line of evidence for Pacific Ocean at Hammonds Beach (Santa Barbara County) was collected at one monitoring site (Hammonds) |
Temporal Representation: |
Data was collected over the time period 1/5/2004 - 12/27/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year. |
Environmental Conditions: |
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QAPP Information: |
QA information not available |
QAPP Information Reference(s): |