| Pollutant: |
Mercury |
| Final Listing Decision: |
Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) |
| Last Listing Cycle's Final Listing Decision: |
Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)(2010) |
| Revision Status |
Original |
| Sources: |
Source Unknown |
| TMDL Name: |
Clear Creek and Hernandez Reservoir Mercury |
| TMDL Project Code: |
123 |
| Date TMDL Approved by USEPA: |
06/03/2004 |
| Impairment from Pollutant or Pollution: |
Pollutant |
| |
| Regional Board Conclusion: |
Region 3 data was not included in the 2012 Integrated Report so all decisions are carried over from the 2010 listing cycle. |
| |
| Regional Board Decision Recommendation: |
No new data were assessed for 2012. The Regional Board will update this decision when new data and information become available and are assessed. |
| |
| State Board Staff 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. |
| |
| |
Line of Evidence (LOE) for Decision ID 19535, Mercury
|
Region 3 |
Hernandez Reservoir |
|
| |
| LOE ID: |
696 |
| |
| Pollutant: |
Mercury |
| LOE Subgroup: |
Pollutant-Tissue |
| Matrix: |
Tissue |
| Fraction: |
Total |
| |
| Beneficial Use: |
Commercial or recreational collection of fish, shellfish, or organisms |
| |
| Number of Samples: |
4 |
| Number of Exceedances: |
3 |
| |
| Data and Information Type: |
Fish tissue analysis |
| Data Used to Assess Water Quality: |
Three out of 4 samples exceeded. Four filet composite samples were collected: 2 largemouth bass, 1 channel catfish, and 1 bullhead. Bass were collected in 1995 and 2002, channel catfish in 1995, and bullhead in 2002. Only the bullhead sample did not exceed the guideline (TSMP, 2002). |
| Data Reference: |
Placeholder reference 2006 303(d) |
| |
| SWAMP Data: |
Non-SWAMP |
| |
| Water Quality Objective/Criterion: |
Central Coast RWQCB Basin Plan: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or produce detrimental physiological responses in human, plant, animal, or aquatic life. |
| Objective/Criterion Reference: |
Placeholder reference 2006 303(d) |
| |
| Evaluation Guideline: |
0.3 ug/g (OEHHA Screening Value). |
| Guideline Reference: |
Placeholder reference 2006 303(d) |
| |
| Spatial Representation: |
One station located in Lake Hernandez on the San Benito River. |
| Temporal Representation: |
Samples were collected 11/30/95 and 11/7/02. |
| Environmental Conditions: |
|
| QAPP Information: |
Toxic Substances Monitoring Program 1994-95 Data Report.
Environmental Chemistry Quality Assurance and Data Report for the Toxic Substances Monitoring Program, 2001-2002. Department of Fish and Game |
| QAPP Information Reference(s): |
| |
Line of Evidence (LOE) for Decision ID 19535, Mercury
|
Region 3 |
Hernandez Reservoir |
|
| |
| LOE ID: |
695 |
| |
| Pollutant: |
Mercury |
| 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 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): |
| |