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Y'l www.energylab.wm ; Helena, IdT 877-472-0711 • Billings, tdT B00-735-4489 n Casper, WY 888-235-0515 <br />anatyncatEiceuexoSraCe 195? Gillette, MY 866-686-7175 a Rapid City, SO 888-672-1225 *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 /> <br />RL %REC Low Limit Report Date: 01/05/11 <br />Work Order: C10110690 <br />High Limit RPD RPDLimit Dual <br />Method: E200.8 Batch. R141005A <br />Sample ID: C10110928-002BMS4 3 Sample Matrix Spike Run: ICPMS4-C._101216A 12/17/10 03:50 <br />Antimony 0.0588 mg/L D.050 118 70 130 <br />Arsenic 0.0526 mg/L 0.0010 105 70 130 <br />Silver 0.0112 mg/L 0.010 56 70 130 S <br />Sample ID: C1 01 10928-0028MSD 3 Sample Matrix Spike Duplicate Run: ICPMS4-C_101216A 12117/10 03:57 <br />Antimony 0.0584 mg/L 0.050 117 70 130 0.6 20 <br />Arsenic 0.0520 mg/L 0.0010 103 70 130 1.2 20 <br />Silver 0.0112 mg/L 0.010 56 70 130 0.2 20 S <br />Sample ID: LAB 3 Method Blank Run: ICPMS4-C_101216A 12/16110 16:35 <br />Antimony ND mg/L 0.0002 <br />Arsenic ND mg/L 4E-05 <br />Silver ND mg/L 8E-05 <br />Sample ID: LFB 3 Laboratory Fortified Blank Run: ICPMS4-C_101216A 12/16110 16:43 <br />Antimony 0.0528 mg/L 0.0010 106 85 115 <br />Arsenic 0.0534 mg/L 0.0010 107 85 115 <br />Sliver 0.0225 mg/L 0.0010 112 85 115 <br />Qualifiers: <br />RL - Analyte reporting limit, ND - Not detected at the reporting limit. <br />MDC - Minimum delectable concentration S - Spike recovery outside of advisory limits. <br />Page 20 of 39