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www.energylab.com ( Helena, MT 877-472-0711 • Billings, MT 808-735 4489 Gasper WY 088-235-0515 <br />Ara"al ExcellaaceSlnca 1851 ! Gillette, WY 866-686-7175 • Rapid city SO BBB-672-1225 • College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Report Date: 01 /19/11 <br />Client: Cotter Corporation Work rder: 010120711 <br />Project: Schwartzwalder Mine _ rk - ---- C10 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: R141855 <br />Method: E200.8 <br />Run: ICPMS4-C_110114A 01/14/11 13:01 <br />Sample ID: LRB 7 Method Blank <br /> ND mg/L 4E-05 <br />Arsenic ND mg/L 7E-05 <br />Cadmium ND mg/L 6E-05 <br />Copper ND mg/L 5E-05 <br />Nickel 8E-05 mg/L 5E-05 <br />Selenium 0.0003 mg/L 8E-05 <br />Silver 2E-05 mg/L 8E-06 <br />Uranium <br /> 7 Laboratory Forti fied Blank Run: ICPMS4-C _110114A <br />Sample ID: LFB 0.0545 mg/L 0.0010 109 85 115 <br />Arsenic 0537 <br />0 mg/L 0.0010 107 85 115 <br />Cadmium . <br />0.0560 mg/L 0.0010 112 85 115 <br />Copper 0.0556 mg/L 0.0010 111 85 115 <br />Nickel <br />0.0542 <br />mg/L <br />0.0010 <br />108 <br />85 <br />115 <br />Selenium 0.0205 mg/L 0.0010 101 85 115 <br />Silver 0.0525 mg/L 0.00030 105 85 115 <br />Uranium <br />Sample ID: 010120711-001DMS4 7 Sample Matrix Spike Run: ICPMS4-C_1 101 14A <br /> 0.0540 mg/L 0.0010 108 70 130 <br />Arsenic 0503 <br />0 mg/L 0.010 101 70 130 <br />Cadmium . <br />0.0494 mg/L 0.010 97 70 130 <br />Copper 0506 <br />0 mg/L 0.0010 98 70 130 <br />Nickel . <br />0.0537 mg/L 0.0010 107 70 130 <br />Selenium 0.0248 mg/L 0.010 124 70 130 <br />Silver 0520 <br />0 mg/L 0.00030 104 70 130 <br />Uranium . <br />Sample ID: 010120711-OOIDMSD 7 Sample Matrix Spike Duplicate <br />Run: ICPMS4-C_110114A <br /> <br />9 <br /> 0.0536 mg/L 0.0010 107 70 130 0. <br />Arsenic 0517 <br />0 mg/L 0.010 103 70 130 2.7 <br />Cadmium . <br />0.0488 mg/L 0.010 96 70 130 1.2 <br />Copper 0493 <br />0 mg/L 0.0010 95 70 130 2.6 <br />Nickel . <br />0548 <br />0 mg/L 0.0010 109 70 130 2.1 <br />Selenium . <br />0.0205 mg/L 0.010 103 70 130 19 <br />Silver 0.0520 mg/L 0.00030 104 70 130 0.1 <br />Uranium <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />01/14/11 13:07 <br />01/15/11 05:39 <br />01/15/11 05:45 <br />20 <br />20 <br />20 <br />20 <br />20 <br />20 <br />20 <br />Page 13 of 23