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www ab.com <br />Aiul hwallO SWUM <br />i241711 + Billings, Mr 801-735-4469• Casper, WY 88111-235-1515 <br />!'?apit c j, SO 888-672-1225 • Callege,Stati an. IX #11"I D-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 12/28/10 <br />Project: Schwartzwalder Mine Monitoring Program-Discharge Work Order: C10110835 <br />Analyte C ount Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.8 Batch: 28386 <br />Sample ID: 010110960-001AMS3 5 Sample Matrix Spike Run: ICPMS4-C_101213A 12/14/10 04:22 <br />Thallium 0.512 mg/L 0.10 102 70 130 <br />Uranium 0.577 mg/L 0.00030 114 70 130 <br />Sample ID: C10110960-OOIAMSD 5 Sample Matrix Spike Duplicate Run: ICPMS4-C_101213A 12/14/10 04:29 <br />Antimony 0.606 mg/L 0.050 121 70 130 1.3 20 <br />Arsenic 0.507 mg/L 0.0010 100 70 130 0.8 20 <br />Boron 0.791 mg/L 0.10 94 70 130 0.7 20 <br />Thallium 0.523 mg/L 0.10 105 70 130 2.3 20 <br />Uranium 0.597 mg/L 0.00030 118 70 130 3.4 20 <br />Method: E200.8 <br />Sample ID: C1 01 10870-002BMS4 <br />Chromium <br />Sample ID: C1 01 10870-002BMSD <br />Chromium <br />Sample ID: LRB <br />Chromium <br />Sample ID: LFB <br />Chromium <br />Sample Matrix Spike <br />0.289 mg/L <br />Sample Matrix Spike Duplicate <br />0.300 mg/L <br />Method Blank <br />ND mg/L <br />Laboratory Fortified Blank <br />0.0520 mg/L <br /> Batch: R141190A <br /> Run: ICPMS4-C_101221A 12/22/1013:06 <br />0.050 114 70 130 <br /> Run: ICPMS4-C_101221A 12/22/1013:13 <br />0.050 118 70 130 3.7 20 <br /> Run: ICPMS4-C 101221A 12/21/1017:14 <br />5E-05 <br /> Run: ICPMS4-C_101221A 12/21/1017:21 <br />0.0010 104 85 115 <br />Oualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 14 of 23