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---- --- ----- <br />wnw.energylab.com Helena, MT 877-472-0711 • Billings, 1AT 800-735-4489 . Casper, WY 888-235-0515 <br />. > * Ana/rffcal &caUeacs Vacs 1852 Gillette, WY 865-686.7175 Rapid City, SD 888-672-1225 College Station, TX 888-690-2218 <br /> QA/QC Summary Report <br /> Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 01105/11 <br />Project: Schwartzwalder Mine Monitoring Program-Surface Wat Work Order: C10110690 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E245.1 Balch: 28291 <br />Sample ID: MB-28291 Method Blank Run: CVAA_C203_101123A 11/23/10 12:02 <br />Mercury ND mg/L 8E-06 <br />Sample ID: LCS-28291 Laboratory Control Sample Run: CVAA_C203_.101123A 11/23/10 12:03 <br />Mercury 0.00532 mg/L 0.0010 106 85 115 <br />Sample ID: C1 01 1 0690-007DMS Sample Matrix Spike Run: CVAA_C203_101123A 11/23/10 12:23 <br />Mercury 0.00508 mg/L 0.00010 101 85 115 <br />Sample ID: 010110690-007DMSD Sample Matrix Spike Duplicate Run: CVAA_C203_.101123A 11/23/10 12:24 <br />Mercury 0.00540 mg/L 0.00010 108 85 115 6.1 10 <br />Qualifiers: <br />RL - Analyle reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 22 of 39