| Pollutant: |
Dieldrin |
| 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: |
2021 |
| 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: |
After review of the available data and information, RWQCB 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. |
| |
| 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 28957, Dieldrin
|
Region 3 |
Pacific Ocean (Point Ano Nuevo to Soquel Point) |
|
| |
| LOE ID: |
30099 |
| |
| Pollutant: |
Dieldrin |
| LOE Subgroup: |
Pollutant-Tissue |
| Matrix: |
Tissue |
| Fraction: |
None |
| |
| Beneficial Use: |
Shellfish Harvesting |
| |
| Number of Samples: |
34 |
| Number of Exceedances: |
12 |
| |
| Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
| Data Used to Assess Water Quality: |
Resident mussles (composites (40-50 individuals) of resident Mytilus californianus) were collected by CCLEAN staff twice a year in 2002, 2003, 2004, 2005 and 2006 at two sample locations. Twelve of the 34 composite samples exceeded the OEHHA screening value for shellfish. |
| Data Reference: |
Final Data CCLEAN Mussel Tissue and Solid Phase Extraction data |
| |
| SWAMP Data: |
Non-SWAMP |
| |
| Water Quality Objective/Criterion: |
OEHHA Screening value for the protection of human health from the consumption of fish and shellfish. Brodberg and Pollock calculated "California Lakes Screening Values" for a 70 kg adult human and based on a fish consumption value of 21 g/day (1999). OEHHA Screening Value in fish and shellfish tissue for Dieldrin is 2.0 ug/Kg. |
| Objective/Criterion Reference: |
Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment |
| |
| Evaluation Guideline: |
|
| Guideline Reference: |
| |
| Spatial Representation: |
Mussles were collected from three coastal locations: rock crop adjacent to Scott Creek Mouth, rock outcrop adjacent to Laguna Creek mouth and rock outcrop at the Hook (end of 41st street in Santa Cruz) |
| Temporal Representation: |
Samples were collected twice a year at the Scott Creek site in 2002, 2003, 2004, 2005 and 2006. Samples were collected twice a year at the Hook site in 2004, 2005 and 2006 and once a year in 2002 and 2003. Samples were collected twice a year at the Laguna Creek site in 2003, and 2006 and once in 2002, 2004 and 2005. |
| Environmental Conditions: |
|
| QAPP Information: |
CCLEAN has an approved QAPP |
| QAPP Information Reference(s): |
| |