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6? _` %v.w.energylab.com i Helena, MT 877-472-0711 > Billings, MT 800-735-4489 v Casper, WY 888-235-0515 <br />_ .? dnaty WErc0onceSlaca 1951 . Gillette, WY 866-686-7175 o Rapid City, SD 886-672-1225 n College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 01/05/11 <br />Project: Schwartzwalder Mine Monitoring Program-Surface Wat Work Order: C10110787 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Quai <br />Method: E200.8 Batch: R140766 <br />Sample ID: LRB 8 Method Blank Run: ICPMS2- C_1012098 12/09/10 21:06 <br />Antimony ND mg/L 7E-05 <br />Arsenic 0.001 mg/L 6E-05 <br />Copper ND mg/L 7E-05 <br />Lead ND mg/L 3E-05 <br />Molybdenum ND mg/L 5E-05 <br />Thallium 3E-05 mg/L 1 E-05 <br />Uranium ND mg/L 1E-05 <br />Zinc 0.0006 mg/L 0.0003 <br />Sample ID: LFB 8 Laboratory Fort ified Blank Run: ICPMS2-C_.1012098 12/09/10 21:12 <br />Antimony 0.0515 mg/L 0.0010 103 85 115 <br />Arsenic 0.0534 mg/L 0.0010 104 85 115 <br />Copper 0.0520 mg/L 0.0010 104 85 115 <br />Lead 0.0522 mg/L 0.0010 104 85 115 <br />Molybdenum 0.0516 mg/L 0.0010 103 85 115 <br />Thallium 0.0515 mg/L 0.0010 103 85 115 <br />Uranium 0.0526 mg/L 0.00030 105 85 115 <br />Zinc 0.0544 mg/L 0.0010 108 85 115 <br />Sample ID: C10110827-001CMS4 8 Sample Matrix Spike Run: ICPMS2-C_1012098 12/10/10 05:58 <br />Antimony 0.0527 mg/L 0.050 105 70 130 <br />Arsenic 0.0542 mg/L 0.0010 107 70 130 <br />Copper 0.0552 mg/L 0.010 99 70 130 <br />Lead 0.0541 mg/L 01050 108 70 130 <br />Molybdenum 0.0550 mg/L 0.0010 105 70 130 <br />Thallium 0.0544 mg/L 0.0010 108 70 130 <br />Uranium 0.0617 mg/L 0.00030 120 70 130 <br />Zinc 0.0675 mg/L 0.010 85 70 130 <br />Sample ID: C1 0110827-001 CMSD 8 Sample Matrix Spike Duplicate Run: ICPMS2-C_101209B 12/10/10 06:05 <br />Antimony 0.0525 mg/L 0.050 104 70 130 0.4 20 <br />Arsenic 0.0542 mg/L 0.0010 108 70 130 0.0 20 <br />Copper 0.0538 mg1L 0.010 96 70 130 2.6 20 <br />Lead 0.0542 mg/L 0.050 108 70 130 0.2 20 <br />Molybdenum 0.0558 mg/L 0.0010 106 70 130 1.5 20 <br />Thallium 0.0547 mg/L 0.0010 109 70 130 0.7 20 <br />Uranium 0.0621 mg/L 0.00030 121 70 130 0.6 20 <br />Zinc 0.0672 mg/L 0.010 84 70 130 0.6 20 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 14 of 30