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wwwxoeroob.com Hcler3, MT 877-472-0711 • Billings, W 800-735-4489 • Casper, WY $80-235-0515 <br />AWryEreatEivshm Xvc.Im J,' i G uAtte, wy 866.686-7175 • Rapid City, SD 886-672-1225 • College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartz-GW 03/30/11 S25671 & S25672 <br />Analyte Count Result Units <br />Method: E200.8 <br />Sample ID: LFB 12 Laboratory Fortified Blank <br />Molybdenum 0.0510 mg/L <br />Silver 0.0214 mg/L <br />Thallium 0.0517 mg/L <br />Uranium 0.0524 mg/L <br />Zinc 0.0563 mg/L <br /> Report Date: 04/25/11 <br /> Work Order: C11030940 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br /> Batch: R144419A <br /> Run: ICPMS4-C_110404A 04/04/1112:35 <br />0.0010 102 85 115 <br />0.0010 107 85 115 <br />0.0010 103 85 115 <br />0.00030 105 85 115 <br />0.0010 111 85 115 <br />Method: E200.8 <br />Sample ID: MB-29448 2 Method Blank <br />Silver 7.52E-05 mg/L <br />Zinc ND mg/L <br />Sample ID: LCS3-29448 2 Laboratory Control Sample <br />Silver 0.0513 mg/L <br />Zinc 0.561 mg/L <br />Sample ID: C11030944-001CMS3 2 Sample Matrix Spike <br />Silver 0.0514 mg/L <br />Zinc 0.502 mg/L <br />Sample ID: C11030944-001CMSD 2 Sample Matrix Spike Duplicate <br />Silver 0.0490 mg/L <br />Zinc 0.477 mg/L <br /> Batch: 29448 <br /> Run: ICPMS4-C 110406A 04/06/11 13:39 <br />5.0E-05 <br />0.0050 <br /> Run: ICPMS4-C_110406A 04/06/1113:46 <br />0.010 102 85 115 <br />0.010 112 85 115 <br /> Run: ICPMS4-C_110406A 04/06/1115:36 <br />0.010 103 70 130 <br />0.010 100 70 130 <br /> Run: ICPMS4-C_110406A 04/06/1115:43 <br />0.010 98 70 130 4.7 20 <br />0.010 95 70 130 5.2 20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 13 of 24