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F7, www.energyiab.com <br />.."? - Anilydcal fxcalkace Shea 1952 <br />Helena, MT 877-472-0711 • Billings, MT 800-735-4489 + Casper, WY 888-235-0515 <br />Gillette, WY 666.686-7175 v Rapid City, SO 888-672-1225 a Coileae Station, A 888-690.2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 01/05/11 <br />Project: Schwartzwalder Mine Monitoring Program-Surface Wat Work Order: C10110787 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Dual <br />Method: E200.8 <br />Sample ID: ICS Method Blank Run: SUB-H67561 <br />Silver ND mg/L 2E-05 <br />Sample ID: LFB Laboratory Fortified Blank Run: SUB-H67561 <br />Silver 0.0181 mg/L 0.0050 91 85 115 <br />Sample ID: H10110332-002CMS Sample Matrix Spike Run: SUB-1-167561 <br />Silver 0.0178 mg/L 0.0050 89 70 130 <br />Sample ID: H10110332-002CMSD Sample Matrix Spike Duplicate Run: SUB-H67561 <br />Silver 0.0189 mg/L 0.0050 95 70 130 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Batch: H R67561 <br />12101/10 17:40 <br />12/01/10 17:45 <br />12/01/10 19:11 <br />12/01/10 19:15 <br />6.4 20 <br />Page 17 of 30 <br />