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ACZ ~ <br />ACZ Iaboratvrres, /nc. <br />2773 Downhill Drive <br />S(eamboar Springs, CO 80487 <br />(800J 334-5493 <br />Lab Sample ID: L28141-04 <br />Client Sample ID: Henson B <br />Client Project ID: <br />ACZ Report ID: RGI25620 <br />Midas Mining Co. Date Sampled: 07/06/2000 /1:30:00 AM <br />P.O. Box 772 Dale Received: 07/07/2000 <br />Philomatlt, OR 97370 Date Reported: 08/08/2000 <br />Wayne R. Giesy <br /> Sample Matrix: Surface Water <br />Metals Analysis <br />Aluminum, dissolved M200.71CP 0.13 B mg/L 0.03 0.2 7/272000 kr <br />Arsenic, total M206.2 GFAA 0.001 B mg/L 0.001 0.005 7/192000 jb <br />Boron, total M200.71CP U mg/L 0.01 0.05 7/132000 ct <br />Cadmium, potentially dissolved M213.2 GFAA 0.0007 B mg/L 0.0005 0.003 7282000 jb <br />Calcium, dissolved M200.71CP 18.1 mg/L 0.2 1 7272000 kr <br />Chromium, potentially dissolved M216.2 GFAA U mg/L 0.001 0.005 8/82000 jl <br />Copper, potentially dissolved M220.2 GFAA 0.009 mg/L 0.001 0.005 82/2000 jl <br />Iron, total recoverable M200.7 ICP 0.19 mg/L 0.01 0.05 7/182000 kr <br />Magnesium, dissolved M200.7 ICP 1.8 mg/L 0.2 I 7272000 kr <br />Manganese, dissolved M200.7 ICP 0.163 mg/L 0.005 0.03 7272000 kr <br />Mercury.lotal M245.1 CVAA U mg/L 0.0004 0.002 7/132000 gag <br />Nickel, potentially dissolved M200.71CP U mg/L 0.01 0.05 8/112000 jb <br />Selenium, total SM 3500-Se C, AA-Hydride U mg/L 0.003 0.02 7202000 gag <br />Silver, potentially dissolved M272.2 GFAA U mg/L 0.0005 0.003 7262000 jb <br />Zinc, potentially dissolved M200.7 ICP 0.07 mg/L 0.01 0.05 8/12000 jb <br />Metals Prep <br />Total Digestion M200.2 GFAA 7/I 12000 emr <br />Total Hot Plate Digestion M200.2 ICP 7/102000 tcg <br />Total Recoverable Digestion M200.21CP 7/102000 tcg <br />Wet Chemistry <br />Chloride M325.2-Colorimetric (RFA) U mg/L 1 5 7/142000 hl <br />Chromium, Nexavalent SM35000r-D U mg/L 0.005 0.03 7/72000 kec <br />Cyanide, WAD SM4500LNILolorimetric w/ U mg/L 0.01 0.05 7/132000 tcg <br /> distillation <br />Hardness as CaC03 SM2340B -Calculation 53 mg/L 1 7 8/82000 talc <br />Lab Filtration ••• 7/82000 tdr <br />Lab Filtration&Acidification ••• 7/82000 tdr <br />Leb Filtration for Potentially •'• 7/82000 Idr <br />Dissolved <br />Nitrate as N, dissolved Calculation: N03N02 minus N02 0.09 B mg/L 0.02 0.1 8/82000 talc <br />NivateMitrite as N, dissolved M353.2 -Automated Cadmium 0.09 B mg/L 0.02 0.1 7/72000 ejs <br /> Reduction <br />Nitrite as N, dissolved M353.2 -Automated Cadmium U mg/L 0.01 0.05 7/72000 ejs <br /> Reduction <br />Nitrogen, ammonia M350.1 -Automated Phonate U mg/L 0.05 0.3 7/152000 hl <br />U = Analyze was andyzed for but not detected az the indicted MDL <br />B = Analyze concentration detected a< a value between MDL and PQL S' I 1 <br />PQL =Practical Quantization Limit L~ <br />Ralph Poulson (VP) /Scott Habermehl (PM) <br />STEW-REPIN.01.99.01 Page 7 of 2 U ~ U <br />8 <br />