| Water Body Name: | San Diego Creek |
| Water Body ID: | CAR3110005020020124134957 |
| Water Body Type: | River & Stream |
DECISION ID |
6835 |
Region 3 |
San Diego Creek |
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| Pollutant: | Toxaphene |
| Final Listing Decision: | Delist from 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | List on 303(d) list (TMDL required list)(2006) |
| Revision Status | Revised |
| Reason for Delisting: | Flaws in original listing |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | This pollutant is being considered for removal from the section 303(d) list under section 3.5 of the Listing Policy.
This waterbody is not located in the Central Coast Region and was assigned to Region 3 in Error. San Diego Creek will be addressed in Region 8 decisions. |
| Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be removed from the section 303(d) list because the waterbody is not in Region 3 and will be assessed by Region 8 staff. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of the available data and information, SWRCB 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. |
| USEPA Action (if applicable): | |
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| LOE ID: | 1917 | ||||
| Pollutant: | Toxaphene | ||||
| LOE Subgroup: | Pollutant-Tissue | ||||
| Matrix: | Tissue | ||||
| Fraction: | Total | ||||
| Beneficial Use: | Commercial or recreational collection of fish, shellfish, or organisms | ||||
| Number of Samples: | 25 | ||||
| Number of Exceedances: | 9 | ||||
| Data and Information Type: | Fish tissue analysis | ||||
| Data Used to Assess Water Quality: | Nine out of 25 samples exceeded (TSMP, 2002). A total of 25 whole fish composite samples were collected: 19 red shiner, 4 fathead minnow, and 2 California killifish. Red shiner were collected from 1992-2001. Fathead minnow were collected in 2001-02. California killifish were collected in 1993. The guideline was exceeded in red shiner from 1992 through 1997. Samples from 1998-2002 did not exceed the guideline. | ||||
| Data Reference: | Placeholder reference 2006 303(d) | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Santa Ana River Basin RWQCB Basin Plan: Toxic substances shall not be discharged at levels that will bioaccumulate in aquatic resources to levels which are harmful to human health. | ||||
| Objective/Criterion Reference: | Placeholder reference 2006 303(d) | ||||
| Evaluation Guideline: | 100 ng/g [NAS Guideline (whole fish)] (NAS, 1972). | ||||
| Guideline Reference: | Placeholder reference 2006 303(d) | ||||
| Spatial Representation: | Three stations were sampled: in the riffle 150 yards upstream from the confluence of San Diego Creek and Peters Canyon Creek (Barranca Parkway), upstream of Michelson Drive, and in small ponds adjacent to the Upper Newport Bay Ecological Reserve. | ||||
| Temporal Representation: | Samples were collected from 1992-2002. | ||||
| Environmental Conditions: | |||||
| QAPP Information: | Environmental Chemistry Quality Assurance and Data Report for the Toxic Substances Monitoring Program, 1996-2000. Department of Fish and Game. Environmental Chemistry Quality Assurance and Data Report for the Toxic Substances Monitoring Program, 2001-2002. Department of Fish and Game. | ||||
| QAPP Information Reference(s): | |||||