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Inter•(llountain Laboratories, Inc. <br />Quality Control Report <br />Duplicate Analysis <br />Client: The Silver Wing Company, Inc. <br />Project: Pride Mill <br />Sample ID: MP-3 <br />Lab ID: 0103W74903 <br />Matrix: Water <br />Condition: Cool/Intact <br />7633 Terra Avenue <br />Sheridan, WY 82801 <br />Report Date: 10/13/03 <br />Receipt Date: 09/25/03 <br />Sample Date: 09/22/03 <br />Time Sampled: 0950 <br />Original Duplicate Relative <br />Parameter Conc. Conc. % Diff. POL Units <br />General Parameters <br />Lab pH 7.7 7.6 1 0.1 s.u. <br />Lab Conductivity ~ 25°C 390 397 2 5 pmhos/cm <br />Total Dissolved Solids @ 180°C 210 210 0 10 mg/L <br />Total Hardness as CaC03 150 149 1 1.0 mg/L <br />WAD Cyanide <0.005 <0.005 NC' 0.005 mg/L <br />Sulfate <10 <10 NC' 10 mg/L <br />Dissolved Metals <br />Arsenic <0.005 <D.005 NC' 0.005 mg/L <br />Cadmium <0.001 <0.001 NC' 0.001 mg/L <br />Copper <0.005 <0.005 NC' 0.005 mg/L <br />Iron 0.06 0.00 0.00" 0.02 mg/L <br />Lead <0.005 <0.005 NG' 0.005 mg/L <br />Manganese 5.94 5.92 0 0.01 mg/L <br />Zinc 0.03 0.04 0.01" 0.01 mg/L <br />'NC -Non-Calculable RPD due to value(s) less than DL " -Difference used for results < 5 X Detection Limit <br />These results only apply to the samples tested. <br />Reference: U.S.E. P.A 600/4->9-020, "Methods for Chemical Analysis of Water and Wastes", 1983. <br />"Stantlard Methotls For The Examination of Water and Wastewater", 19th ed., 1995. <br />EPA 600/R93/I00, "",(M~eth.,ods/for the Determination of Inorganic Substances in Environmental Samples", Aug. 1993. <br />Reviewed By: ~(.tlW/ICJI~-~- <br />Karen Barten, Project Manager <br />