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._.. .......... ._._....... ..__ <br />Aww.energylabxo n ' Helena, MT 877-472-0711 - Billings, MT 800-735-4488 - Caspor, WY 888-235-0515 <br />a Mafytrra/&celfencsSlnce 1951 Gillette, WY 865-686-7175 « Rapid City, SD 888-672-1225 v College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartzwalder Mine Monitoring Program-Surface Wat <br />Analyte Count Result Units <br />Method: E200.8 <br />Sample ID: ICB 9 Method Blank <br />Aluminum 0.0003 mg/L <br />Antimony ND mg/L <br />Copper ND mg/L <br />Iron 0.0002 mg/L <br />Manganese ND mg/L <br />Molybdenum ND mg/L <br />Thallium ND mg/L <br />Uranium ND mg/L <br />Zinc ND mg/L <br />Sample ID: LFB 9 Laboratory Fort ified Blank <br />Aluminum 0.0487 mg/L <br />Antimony 0.0501 mg/L <br />Copper 0.0468 mg/L <br />Iron 4.90 mg/L <br />Manganese 0.0490 mg/L <br />Molybdenum 0.0501 mg/L <br />Thallium 0.0497 mg/L <br />Uranium 0.0507 mg/L <br />Zinc 0.0489 mg/L <br />Sample ID: H10110374-003BMS 9 Sample Matrix Spike <br />Aluminum 0.0933 mg/L <br />Antimony 0.0996 mg/L <br />Copper 0.0883 mg/L <br />Iron 9.22 mg/L <br />Manganese 0.0961 mg/L <br />Molybdenum 0.0993 mg/L <br />Thallium 0.0972 mg/L <br />Uranium 0.105 mg/L <br />Zinc 0.114 mg/L <br />Sample ID: H1 01 10374-003SMSD 9 Sample Matrix Spike Duplicate <br />Aluminum 0.0952 mg/L <br />Antimony 0.101 mg/L <br />Copper 0.0943 mg/L <br />Iron 9.85 mg/L <br />Manganese 0.0956 mg/L <br />Molybdenum 0.101 mg/L <br />Thallium 0.0975 mg/L <br />Uranium 0.107 rng/L <br />Zinc 0.123 mg/L <br />Report Date: 01/05/11 <br />Work Order: C10110787 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Balch: H _R67530 <br />Run: SUB-1-167530 11/30/10 16:37 <br />0.0002 <br />1 E-05 <br />3E-05 <br />0.0002 <br />2E-05 <br />2E-05 <br />2E-05 <br />1 E-05 <br />0.0006 <br /> Run: SUB-1-167530 11/30/10 16:41 <br />0.10 97 85 115 <br />0.050 100 85 115 <br />0.010 94 85 115 <br />0.030 98 85 115 <br />0.010 98 85 115 <br />0.0050 100 85 115 <br />0.10 99 85 115 <br />0.0010 101 85 115 <br />0.010 98 85 115 <br /> Run: SUB-1-167530 11/30/10 20:05 <br />0.010 92 70 130 <br />0.0050 100 70 130 <br />0.010 87 70 130 <br />0.030 92 70 130 <br />0.010 95 70 130 <br />0.0050 96 70 130 <br />0.0050 97 70 130 <br />0.0010 99 70 130 <br />0.010 90 70 130 <br /> Run: SUB-1-167530 11 /30/10 20:11 <br />0.010 94 70 130 2.0 20 <br />0.0050 101 70 130 0.9 20 <br />0.010 93 70 130 6.6 20 <br />0.030 98 70 130 6.6 20 <br />0.010 95 70 130 0.5 20 <br />0.0050 97 70 130 1.4 20 <br />0.0050 98 70 130 0.3 20 <br />0.0010 100 70 130 1.5 20 <br />0.010 99 70 130 7.8 20 <br />Qualifiers: <br />RL - Analyto reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 16 of 30