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PCB Impairment Assessment/ Conceptual Model

This report provides an assessment of impairment indicators for PCBs, including predicted changes in mass over time. It explores trends and predictions for PCB decline, highlighting the importance of load reductions in accelerating recovery. The report also examines various sources of PCB contamination, such as nonurban runoff, effluents, and contaminated sites. Feedback is encouraged to enhance the draft report.

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PCB Impairment Assessment/ Conceptual Model

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  1. PCB Impairment Assessment/Conceptual Model Jay Davis SFEI CEP-funded IA/CM report just beginning, but we already have… • Draft PCB TMDL Project Report • RMP mass budget work • Food web modeling providing linkage The following are preliminary thoughts on content of the IA/CM report Illustrations by Steve Curtis

  2. IMPAIRMENT INDICATORS FOR PCBS

  3. Predicted change in mass over time We are here 40 kg 20 kg We want to be here 0 kg 0 10 20 30 40 50 60 70 80 90 100 Year TRENDS AND PREDICTIONS FOR PCBS 50% decline in the past 20 years Load reductions are predicted to accelerate recovery significantly

  4. Delta Outflow

  5. Nonurban runoff

  6. Dredging

  7. Effluents

  8. Contaminated Sites

  9. Buried Sediment

  10. Urban Runoff

  11. Your feedback is encouraged Draft report in July jay@sfei.org

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