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February 3, 2009

Placer County Water Agency Middle Fork American River Project AQ 11 – Water Quality Contingency Sampling Protocol (Contingency Study). February 3, 2009. 2007 and 2008 Sampling Locations. AQ 11 – TSP Study. 10 sport fish of edible size 5 each of two different species (if present)

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February 3, 2009

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  1. Placer County Water AgencyMiddle Fork American River ProjectAQ 11 – Water Quality Contingency Sampling Protocol(Contingency Study) February 3, 2009

  2. 2007 and 2008 Sampling Locations

  3. AQ 11 – TSP Study • 10 sport fish of edible size • 5 each of two different species (if present) • Species priority ranking: 1) Bass, 2) Pikeminnow, 3) Lake Trout, 4) Brown Trout, 5) Rainbow Trout AQ 11 – TSP Contingency Study • 9 - 12 of each target sport fish of edible size • PCWA to consult with Aquatic TWG if unable to collect target number of individuals

  4. 2008 Edible Size Limits for Target Species(Note: some fish sampled in 2007 smaller than 2008 min. size)

  5. Methylmercury Fish Sampling Locations and Target Number of Fish 1 Fish were analyzed as 1 composite in 2007. 2 Fish were analyzed in 2007, but were smaller than the 2008 legal and edible-size limit (see Table AQ 11-2).

  6. Fish and Crayfish Muscle Tissue Analysis Results 2007 and 2008

  7. EPA Guideline: 0.3 ppm OEHHA Screening Level: 0.08 ppm Fish and Crayfish Muscle Tissue Analysis Results 2007 and 2008 (zoom in)

  8. Average Methylmercury Concentrations (mg/kg-fish) and Number of Fish and Crayfish Individual fish analyses of 2008 edible size ONLY Bold values indicate screening value of 0.08 mg/Kg were exceeded (Cal EPA 2005; Klasing and Brodberg 2006).

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