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wawwAstrgtlam.com <br />ANONIIN "Cal W OM ligi <br />7 4724711, + Billings, NT 801-735-4459 • Casper, wr 888-235-1513 <br />?i75"„ RapidCRy, S01l18-i72-1Y25 • Cdlega Station, TK 881.610-221a?J <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartzwalder Mine Monitoring Program-Discharge <br />Analyte Count Result Units <br />Method: E200.8 <br />Sample ID: MB-28315 7 Method Blank <br />Arsenic ND mg/L <br />Cadmium ND mg/L <br />Copper 0.0004 mg/L <br />Nickel 0.0002 mg/L <br />Selenium 6E-05 mg/L <br />Uranium ND mg/L <br />Zinc 0.004 mg/L <br />Sample ID: C10110835-001 EMS4 7 Sample Matrix Spike <br />Arsenic 0.0511 mg/L <br />Cadmium 0.0498 mg/L <br />Copper 0.0482 mg/L <br />Nickel 0.0471 mg/L <br />Selenium 0.0530 mg/L <br />Uranium 0.0514 mg/L <br />Zinc 0.0761 mg/L <br />Sample ID: C10110835-001EMSD 7 Sample Matrix Spike Duplicate <br />Arsenic 0.0513 mg/L <br />Cadmium 0.0509 mg/L <br />Copper 0.0490 mg/L <br />Nickel 0.0486 mg/L <br />Selenium 0.0534 mg/L <br />Uranium 0.0516 mg/L <br />Zinc 0.0756 mg/L <br />Report Date: 12/28/10 <br />Work Order: C10110835 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: 28315 <br />Run: ICPMS4-C_101213A 12/14/10 08:30 <br />4E-05 <br />7E-05 <br />6E-05 <br />5E-05 <br />5E-05 <br />8E-06 <br />0.0001 <br /> Run: ICPMS4-C_101213A 12/14/10 08:44 <br />0.0010 102 70 130 <br />0.010 99 70 130 <br />0.010 93 70 130 <br />0.0010 92 70 130 <br />0.0010 105 70 130 <br />0.00030 103 70 130 <br />0.010 98 70 130 <br /> Run: ICPMS4-C_101213A 12/14/10 09:18 <br />0.0010 102 70 130 0.4 20 <br />0.010 102 70 130 2.2 20 <br />0.010 95 70 130 1.6 20 <br />0.0010 95 70 130 3.2 20 <br />0.0010 106 70 130 0.7 20 <br />0.00030 103 70 130 0.4 20 <br />0.010 97 70 130 0.6 20 <br /> <br />Method: E200.8 tsaicn: 4oooo <br />Sample ID: MB-28386 5 Method Blank Run: ICPMS4-C_101213A 12/14/10 02:19 <br />Antimony ND mg/L 0.0003 <br />Arsenic 0.0005 mg/L 5E-05 <br />Boron 0.01 mg/L 0.003 <br />Thallium 0.0007 mg/L 0.0001 <br />Uranium 5E-05 mg/L 4E-05 <br />Sample ID: LCS3-28386 5 Laboratory Control Sample Run: ICPMS4-C_101213A 12/14/10 02:53 <br />Antimony 0.616 mg/L 0.050 123 85 115 S <br />Arsenic 0.548 mg/L 0.0010 109 85 115 <br />Boron 0.561 mg/L 0.10 110 85 115 <br />Thallium 0.536 mg/L 0.10 107 85 115 <br />Uranium 0.574 mg/L 0.00030 115 85 115 <br />onse is above standard QA limit. <br />- Res This could indicate a high bias for the sample results. S ince there were no detectable analyte responses, and the remainder of the <br />p <br />run QA is within acceptance range, this batch is approved. <br />Sample ID: C10110960-001AMS3 5 Sample Matrix Spike Run: ICPMS4-C_101213A 12/14/10 04:22 <br />Antimony 0.598 mg/L 0.050 119 70 130 <br />Arsenic 0.503 mg/L 0.0010 100 70 130 <br />Boron 0.796 mg/L 0.10 95 70 130 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />S - Spike recovery outside of advisory limits. <br />Page 13 of 23 <br />