| Pollutant: |
Mercury |
| 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)(2010) |
| Revision Status |
Original |
| Sources: |
Source Unknown |
| Expected TMDL Completion Date: |
2013 |
| Impairment from Pollutant or Pollution: |
Pollutant |
| |
| Regional Board Conclusion: |
Region 2 data was not included in the 2012 Integrated Report so all decisions are carried over from the 2010 listing cycle. |
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| Regional Board Decision Recommendation: |
No new data were assessed for 2012. The decision has not changed. |
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| State Board Staff Review of Regional Board Conclusion and Recommendation: |
|
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| State Board Decision Recommendation: |
After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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Line of Evidence (LOE) for Decision ID 19170, Mercury
|
Region 2 |
Nicasio Reservoir |
|
| |
| LOE ID: |
670 |
| |
| Pollutant: |
Mercury |
| LOE Subgroup: |
Pollutant-Tissue |
| Matrix: |
Tissue |
| Fraction: |
Total |
| |
| Beneficial Use: |
Commercial or recreational collection of fish, shellfish, or organisms |
| |
| Number of Samples: |
9 |
| Number of Exceedances: |
2 |
| |
| Data and Information Type: |
Fish tissue analysis |
| Data Used to Assess Water Quality: |
Two out of 9 samples exceeded. A total of 9 composite samples were collected and analyzed from Nicasio Reservoir: 3 bluegill, 3 carp, and 3 largemouth bass. Two largemouth bass samples exceeded guideline (TSMP, 2002). |
| Data Reference: |
Placeholder reference 2006 303(d) |
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| SWAMP Data: |
Non-SWAMP |
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| Water Quality Objective/Criterion: |
San Francisco Bay RWQCB Basin Plan: Many pollutants can accumulate on particles, in sediment, or bioaccumulate in fish and other aquatic organisms. Controllable water quality factors shall not cause a detrimental increase in concentrations of toxic substances found in bottom sediments or aquatic life. Effects on aquatic organisms, wildlife, and human health will be considered. |
| Objective/Criterion Reference: |
Placeholder reference 2006 303(d) |
| |
| Evaluation Guideline: |
OEHHA Screening Value of 0.3 ug/g for mercury (Brodberg & Pollock, 1999). |
| Guideline Reference: |
Placeholder reference 2006 303(d) |
| |
| Spatial Representation: |
One station. |
| Temporal Representation: |
All samples were collected on 9/19/2001. |
| Environmental Conditions: |
|
| QAPP Information: |
Environmental Chemistry Quality Assurance and Data Report for the Toxic Substances Monitoring Program, 2001-2002. Department of Fish and Game. |
| QAPP Information Reference(s): |
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