AgdaPkt 2016-02-22 Closed and Interview and Joint SA PFA

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APPENDICES City of Redwood City, Public Works Division Initial Study & Mitigated Negative Declaration 16 Blankinship & Associates, Inc. loss in adults. Juveniles were too small to evaluate scale loss. Physiological condition of fish fed invertebrates containing metals was compromised. Woodward et al. 1995 Rainbow trout (Oncorhynchus mykiss) and brown trout (Salmo trutta) were held in standard laboratory water or contained metal concentrations based on 50% the U.S. EPA’s water-quality criteria with concentrations of 1.1 μg/L Cd, 12 μg/L Cu, 3.2 μg/L Pb, and 50 μg/L Zn from hatching to 88 days of age. Three diets were provided that comprised of benthic invertebrates collected from three locations on the Clark Fork River, Montana. Fish received pelleted invertebrates containing 6.5 As, no Cd, 87 Cu, 6.9 Pb, and 616 Zn (all mg/g dry weight); 19 As, no Cd, 178 Cu, 15 Pb, and 650 Zn (all mg/g dry weight); or 19 As, 0.26 Cd, 174 Cu, 15 Pb, and 648 Zn (all mg/g dry weight). Survival was not affected for either species by any combination of water or diet. Growth of brown trout was reduced in the groups receiving the diets with higher metals concentration and by exposure to metal- containing water from day 26 onward in the test. In rainbow trout, no effects were seen on growth at day 18, but by day 53, growth was reduced in fish exposed to higher metal concentrations in diet or water. However, the rainbow trout exposed to diets with higher metals concentrations had similar growth patterns regardless of whether they were also exposed to metals-containing water. Also, the growth of the rainbow trout exposed to treated water and the diet with low metal concentrations recovered by day 88 and were no longer significantly different from fish in untreated water. Draves and Fox 1998 In a reach of the Montreal River in northern Ontario contaminated from gold mine tailings, water concentrations were significantly higher for Cu, Cd, and Pb, but not for Zn. Juvenile yellow perch (Perca flavescens), a benthic feeding species, had significantly less food in their stomachs in the contaminated reach than perch in an uncontaminated reach. However, body weights of juvenile perch did not differ between the contaminated and uncontaminated reaches. Within the contaminated reach, Cu body burdens were significantly negatively correlated with body weight. Concentrations of Cu in Chironomidae, Hemiptera, Cladocera, Odonata, and Amphipoda were compared between reaches. Concentrations in Chironomidae, Hemiptera, Cladocera, and Amphipoda were greater in the contaminated reach, but Cu concentrations were greater in Odonata in the uncontaminated reach. Sublethal Effects Folmar 1976 Rainbow trout (Oncorhynchus mykiss) fry showed strong avoidance to copper (CuSO4·5H2O) at concentrations of 0.0001 to 0.01 ppm in the laboratory. Folmar 1978 Mayfly nymphs (Ephemerella walkeri) showed strong avoidance to copper (CuSO4·5H2O) at a concentration of 0.1 ppm but not 0.001 or 0.01 ppm in the laboratory. 6.3.A. - Page 85