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DECISION ID |
5533 |
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| Pollutant: |
Indicator Bacteria |
| Final Listing Decision: |
Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: |
Do Not List on 303(d) list (TMDL required list)(2006) |
| Revision Status |
Original |
| Impairment from Pollutant or Pollution: |
Pollutant |
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| Weight of Evidence: |
This pollutant 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 (one for enterococcus, one for fecal coliform and the other for total coliform) in the administrative record to assess this pollutant. Only one sample in each baterial indicator exceeded water quality standards.
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 may satisfy the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. Three of 21 samples taken in1999 exceeded the AB 411 bacterial indicator standards and this does not exceed the allowable frequency listed in Table 3.3 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: |
No new data were assessed for 2008. The decision has not changed. |
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| SWRCB Board Decision / Staff Recommendation: |
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| USEPA Decision: |
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| LOE ID: |
329 |
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| Pollutant: |
Indicator Bacteria |
| LOE Subgroup: |
Pollutant-Water |
| Matrix: |
Water |
| Fraction: |
None |
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| Beneficial Use: |
Water Contact Recreation |
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| Number of Samples: |
6 |
| Number of Exceedances: |
1 |
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| Data and Information Type: |
PATHOGEN MONITORING |
| Data Used to Assess Water Quality: |
Data were collected by the City of San Diego in 1999. There was not enough data to calculate geomeans for any of the bacterial indicators.
AB411 Standards: For enterococcus, 1 of 7 single sample concentrations was in exceedance. For fecal coliform, 1 of 8 single sample concentration was in exceedance. For total coliform, where the FC/TC ratio was below 0.1, there were no exceedances. Where the ratio was above 0.1, 1 of 6 samples was in exceedance.
Basin Plan standards: For fecal coliform, there was not enough data to calculate geomeans and only single sample concentrations were looked at. Basin Plan stds. for REC2 for fecal coliform deal with 30-day averages, which could not be calculated from this dataset. However, in looking at the dataset, the assessor can comment that 7 of 8 single sample concentrations were below 400 colonies/100 mL, with one concentration being 3000 colonies/100 mL. (City of San Diego, 2004). |
| Data Reference: |
Placeholder reference 2006 303(d) |
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| Water Quality Objective/Criterion: |
From the Basin Plan: For inland surface waters, enclosed bays and estuaries, coastal lagoons, and ground waters with a REC2 beneficial use, the WQO for Fecal Coliform is and average of 2,000 colonies/100mL for any 30-day period. No more than 10% of total samples during any 30-day period should exceed 4,000 colonies per 100 mL.
AB411 standards: for fecal coliform: 30-day avg is 200 colonies/100 mL, single sample standard is 400 colonies/100 mL. For total coliform: 30-day avg. is 1,000 colonies/100mL, single sample standard is 10,000 colonies/100 mL. If fecal/total ratio is greater than 0.1, the single sample maximum for total coliform is 1,000 colonies/100 mL.. The AB411 standard for enterococcus for the 30-day avg is 35 colonies/100mL, single sample maximum is 104 colonies/100 mL. |
| Objective/Criterion Reference: |
Placeholder reference 2006 303(d) |
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| Evaluation Guideline: |
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| Guideline Reference: |
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| Spatial Representation: |
Samples were collected at San Diego Bay, near Chollas Creek at a "middle" location. |
| Temporal Representation: |
Samples were collected from 02/22/1999 to 08/17/1999. |
| Environmental Conditions: |
Southern California has three distinct weather/hydrological conditions: summer dry weather, winter dry weather, and storm events. The data set used in this analysis includes summer and winter season data. Whether or not storm event samples are included in the data set are not known. For future water quality assessments, the RWQCB may classify bacteria samples as summer dry, winter dry, or storm event samples to ensure adequate representation of all three weather/hydrological conditions. |
| QAPP Information: |
QA Info Missing |
| QAPP Information Reference(s): |
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DECISION ID |
7464 |
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| Pollutant: |
Benthic Community Effects |
| Final Listing Decision: |
List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: |
List on 303(d) list (TMDL required list)(2006) |
| Revision Status |
Original |
| Sources: |
Source Unknown | Unknown Nonpoint Source | Unknown Point Source |
| Expected TMDL Completion Date: |
2010 |
| Impairment from Pollutant or Pollution: |
Pollution |
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| Weight of Evidence: |
303(d) listing decisions made prior to 2006 were not held in an assessment database. The Regional Boards will update this decision when new data and information become available and are assessed. |
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| RWQCB Board Decision / Staff Recommendation: |
No new data were assessed for 2008. The decision has not changed. |
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| SWRCB Board Decision / Staff Recommendation: |
N/A |
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| USEPA Decision: |
|
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Lines of Evidence (LOEs) for Decision ID 7464 |
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| LOE ID: |
4703 |
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| Pollutant: |
Benthic Community Effects |
| LOE Subgroup: |
Population/Community Degradation |
| Matrix: |
Sediment |
| Fraction: |
Not Recorded |
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| Beneficial Use: |
Marine Habitat |
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| Number of Samples: |
0 |
| Number of Exceedances: |
0 |
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| 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) |
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| Water Quality Objective/Criterion: |
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| Objective/Criterion Reference: |
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| Evaluation Guideline: |
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| Guideline Reference: |
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| Spatial Representation: |
Unspecified |
| Temporal Representation: |
Unspecified |
| Environmental Conditions: |
Unspecified |
| QAPP Information: |
Unspecified |
| QAPP Information Reference(s): |
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DECISION ID |
7466 |
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| Pollutant: |
Sediment Toxicity |
| Final Listing Decision: |
List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: |
List on 303(d) list (TMDL required list)(2006) |
| Revision Status |
Original |
| Sources: |
Source Unknown | Unknown Nonpoint Source | Unknown Point Source |
| Expected TMDL Completion Date: |
2010 |
| Impairment from Pollutant or Pollution: |
Pollutant |
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| Weight of Evidence: |
303(d) listing decisions made prior to 2006 were not held in an assessment database. The Regional Boards will update this decision when new data and information become available and are assessed. |
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| RWQCB Board Decision / Staff Recommendation: |
No new data were assessed for 2008. The decision has not changed. |
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| SWRCB Board Decision / Staff Recommendation: |
N/A |
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| USEPA Decision: |
|
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Lines of Evidence (LOEs) for Decision ID 7466 |
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| LOE ID: |
4704 |
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| Pollutant: |
Sediment Toxicity |
| LOE Subgroup: |
Toxicity |
| Matrix: |
Sediment |
| Fraction: |
Not Recorded |
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| Beneficial Use: |
Marine Habitat |
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| Number of Samples: |
0 |
| Number of Exceedances: |
0 |
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| 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) |
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| Water Quality Objective/Criterion: |
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| Objective/Criterion Reference: |
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| Evaluation Guideline: |
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| Guideline Reference: |
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| Spatial Representation: |
Unspecified |
| Temporal Representation: |
Unspecified |
| Environmental Conditions: |
Unspecified |
| QAPP Information: |
Unspecified |
| QAPP Information Reference(s): |
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| LOE ID: |
4703 |
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| Pollutant: |
Benthic Community Effects |
| LOE Subgroup: |
Population/Community Degradation |
| Matrix: |
Sediment |
| Fraction: |
Not Recorded |
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| Beneficial Use: |
Marine Habitat |
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| Number of Samples: |
0 |
| Number of Exceedances: |
0 |
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| 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) |
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| Water Quality Objective/Criterion: |
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| Objective/Criterion Reference: |
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| Evaluation Guideline: |
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| Guideline Reference: |
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| Spatial Representation: |
Unspecified |
| Temporal Representation: |
Unspecified |
| Environmental Conditions: |
Unspecified |
| QAPP Information: |
Unspecified |
| QAPP Information Reference(s): |