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DECISION ID |
4775 |
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| Pollutant: |
Eutrophic |
| Final Listing Decision: |
Do Not Delist from 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: |
Do Not Delist from 303(d) list (TMDL required list)(2006) |
| Revision Status |
Original |
| Sources: |
Nonpoint Source | Point Source |
| Expected TMDL Completion Date: |
2019 |
| Impairment from Pollutant or Pollution: |
Pollutant |
| |
| Weight of Evidence: |
>>One line of evidence is available in the administrative record. Information is not backed with data. Based on the information presented, the water body-pollutant should not be placed on the section 303(d) list because it cannot be determined if the pollutant contribute to or cause a toxicological effect (section 2 of the Listing Policy). |
| |
| RWQCB Board Decision / Staff Recommendation: |
No new data were assessed for 2008. The Regional Board will update this decision when new data and information become available and are assessed. |
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| SWRCB Board Decision / Staff Recommendation: |
After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if water quality standards have been exceeded. |
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| USEPA Decision: |
|
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| |
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| LOE ID: |
320 |
| |
| Pollutant: |
Eutrophic |
| LOE Subgroup: |
Testimonial Evidence |
| Matrix: |
Not Specified |
| Fraction: |
None |
| |
| Beneficial Use: |
Estuarine Habitat |
| |
| Number of Samples: |
0 |
| Number of Exceedances: |
0 |
| |
| Data and Information Type: |
Not Specified |
| Data Used to Assess Water Quality: |
From the letter written by the San Diego Baykeeper on 06/14/2004: We recommend continued listing of Mission Bay for eutrophication, lead, and bacterial indicators.
No raw data or other specifics were given. |
| 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, the WQO for Biostimulatory substances states that inland surface waters, bays and estuaries, and coastal lagoon waters shall not contain biostimulatory substances in concentrations that promote aquatic growth to the extent that such growths cause nuisance or adversely affect beneficial uses. Concentrations of nitrogen and phosphorus, by themselves or in combination with other nutrients, shall be maintained at levels below those which stimulate algae and emergent plant growth. |
| Objective/Criterion Reference: |
Placeholder reference 2006 303(d) |
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| Evaluation Guideline: |
|
| Guideline Reference: |
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| Spatial Representation: |
The area is described as Mission Bay. Exact location was not given. |
| Temporal Representation: |
The letter regarding possible impairment was written on 06/14/2004. Dates of studies or sampling events were not given. |
| Environmental Conditions: |
|
| QAPP Information: |
QA Info Missing |
| QAPP Information Reference(s): |
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DECISION ID |
4713 |
| |
| Pollutant: |
Lead |
| Final Listing Decision: |
Do Not Delist from 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: |
Do Not Delist from 303(d) list (TMDL required list)(2006) |
| Revision Status |
Original |
| Sources: |
Nonpoint Source | Point Source |
| Expected TMDL Completion Date: |
2019 |
| Impairment from Pollutant or Pollution: |
Pollutant |
| |
| Weight of Evidence: |
>>One line of evidence is available in the administrative record. Information is not backed with numerical data. Based on the information presented, the water body-pollutant should not be placed on the section 303(d) list because it cannot be determined if the pollutant contribute to or cause a toxicological effect (section 2 of the Listing Policy). |
| |
| RWQCB Board Decision / Staff Recommendation: |
No new data were assessed for 2008. The Regional Board will update this decision when new data and information become available and are assessed. |
| |
| SWRCB Board Decision / Staff Recommendation: |
|
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| USEPA Decision: |
|
| |
| |
Lines of Evidence (LOEs) for Decision ID 4713 |
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| LOE ID: |
321 |
| |
| Pollutant: |
Lead |
| LOE Subgroup: |
Testimonial Evidence |
| Matrix: |
Not Specified |
| Fraction: |
None |
| |
| Beneficial Use: |
Industrial Service Supply |
| |
| Number of Samples: |
0 |
| Number of Exceedances: |
0 |
| |
| Data and Information Type: |
Not Specified |
| Data Used to Assess Water Quality: |
From the letter written by the San Diego Baykeeper on 06/14/2004: We recommend continued listing of Mission Bay for eutrophication, lead, and bacterial indicators (San Diego Baykeeper, 2004) . |
| Data Reference: |
Placeholder reference 2006 303(d) |
| |
| Water Quality Objective/Criterion: |
The CTR, saltwater acute standard is 210 ppb and the saltwater chronic standard is 8.1 ppb. The probable effects level for marine and estuary sediment is 112.18 ppm. The Ocean Plan objective for the protection of marine aquatic life 6-month median is 2ppb, the daily maximum is 8 ppb and the instantaneous maximum is 20 ppb. |
| Objective/Criterion Reference: |
Placeholder reference 2006 303(d) |
| |
| Evaluation Guideline: |
|
| Guideline Reference: |
| |
| Spatial Representation: |
The area is described as Mission Bay. Exact location was not given. |
| Temporal Representation: |
The letter regarding possible impairment was written on 06/14/2004. Exact dates of studies or sampling events were not given. |
| Environmental Conditions: |
|
| QAPP Information: |
QA Info Missing |
| QAPP Information Reference(s): |