2007-12-19_REVISION - M1988112 (17)

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Table 1 - Calculated Benchmarks for Four Metals Against Seven Bird Species for San Luis Mine Test Species Analyte NOAEL (m Ih /d) Test Species Body Weight' (kg) Receptor Species Body Weight (k) Receptor NOAEL2 (mgA id) Water Ingestion Rate Ud) Benchmark mg/I-) Barium 208 0 121 1 31 73 0.059 538 Boron 288 1 1 28 80 0.059 488 Mallard Duck Fluoride 7.8 0.181 1 10.98 0.059 186 Manganese 977 0072 1 1,653.59 0059 28.027 Barium 208 0 121 0 815 30,46 0.051 483 Lesser Boron 28.8 1 0 615 27.65 0.051 438 Scaup Fluoride 7.8 0 181 0 815 1054 0.051 167 Manganese 977 0.072 0 815 1.58730 0.051 25,147 Barium 20.8 0121 1.056 32.08 0.061 554 Red Tailed Boron 28.8 1 1 056 29 12 0.061 502 Hawk Fluoride 7.8 0.181 1.056 11.10 0061 192 Manganese 9T7 0-072 1.056 1,671.55 0061 28,641 Banum 20.8 0.121 0.043 16 91 0.007 101 Sand Piper Boron 28.8 1 0.043 15.35 0.007 92 (Spotted) F luonde 7.8 0 181 0.043 5 85 0.007 35 Manganese 977 0.072 0 043 879 24 0,007 5.256 Barium 208 0 121 0 01 12,63 0.003 47 Wren Boron 288 1 0.01 11.47 0 003 43 (Marsh) Fluoride 7.8 0 181 0 01 4 37 0 003 16 Manganese 977 0.072 0.01 658 31 0.003 2,441 Barium 20.8 0 121 0 077 19 00 0.011 138 American Boron 28.8 1 0 077 17 25 0.011 125 Robin Fluoride 7.8 0.181 0 077 6 57 0 011 48 Manganese 977 0.072 0 077 990 98 0.011 7,216 Barium 20.8 0.121 0.18 22.52 0.019 217 Gambel's 28.8 1 0.18 2044 . 0.019 197 Quail LI 7 8 0181 _ 0_18 7 79 0.019 75 _ .e 977 0072 1 01 8 117350 0.019 11,295 Notes ' Test NOAELs and weights obtained from Sample et al 1996 : Body weights obtained as follows. Mallard Duck - Sample et at 19% Lesser Scaup - USEPA 1993, as mean male and female, location USA Red Tailed Hawk - USEPA 1993, as mean adult male and female, location sw Idaho Sand Piper (Spotted) - USEPA 1993, as mean adult male and female Wren (Marsh) - USEPA 1993, as mean adult mate and female. location Georgia Amercan Robin - USEPA 1993, as adult bird all seasons Gambel's Quail - Brown. 1998, as mean 160 - 200g ' Alornetric conversion was preformed by equation recommended by Sample and Arenal 1999 ' Ingestion Rates (Uday) calculated by allometnc equation (IFS ,K = 0 059'Wt06') as per USEPA 1993 References Sample, B E , D M Opresko, and G W Suter 1996 Toxicological Benchmarks for Wildlife 1996 Revision. Oak Ridge National Laboratory ES/ER/TM-861R3 June 1996 USEPA 1993 Wildlife Exposure Factors Handbook Office of Research and Development Washington D-C EPA/600/R-93/187a December 1993 Brown, 0, J Hagelin, M Taylor, J Galloway. 1998 Gambers Quail 'Callipepia gambelhi' The Birds of North America, 321. 1-24 as cited in Univ of Michigan Animal Diversity Web http1/animatdiverslty ummz umich.edu/site/accounts/information/Callipepla_gaml>elii html Sample. B. and l :',renal Ig44 A11001e11c'00delS 6m Inicrspceies Uxtiapuiauon of Wildlite l o\udy Uaia NuH Uri man (bnranr /10AIL01 , 61 653 663 Confidential Settlement Discussions Subject to F R E 408