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www.enefdob.com Helena, 14T 877-472-0711 • Billings, tai 800-735-4489 < Casper, WY 888-235-0515 <br />,. M Aalytl I&ce9anca Since 1932 Gillette, WY 866-686-7175 a Rapid City, SD 868.672-1225 a 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 Wal <br />Analyte Count Result Units <br />Method: E200.8 <br />Sample ID: 010110730-005BMS4 9 Sample Matrix Spike <br />Aluminum 0.0469 mg/L <br />Antimony 0.0556 mg/L <br />Copper 0.0487 mg/L <br />Iron 1.53 mg/L <br />Manganese 1.12 mg/L <br />Molybdenum 0.0509 mg/L <br />Thallium 0.0528 mg/L <br />Uranium 0.0832 mg/L <br />Zinc 0.0445 mg/L <br />Sample ID: C10110730-005BMSD 9 Sample Matrix Spike Duplicate <br />Aluminum 0.0457 mg/L <br />Antimony 0.0553 mg/L <br />Copper 0.0474 mg/L <br />Iron 1.63 mg/L <br />Manganese 1.11 mg/L <br />Molybdenum 0.0537 mg/L <br />Thallium 0.0519 mg/L <br />Uranium 0.0823 mg/L <br />Zinc 0.0426 mg/L <br />Sample ID: LRB 9 Method Blank <br />Aluminum 0.004 mg/L <br />Antimony 0.0005 mg/L <br />Copper ND mg/L <br />Iron 0.0002 mg/L <br />Manganese ND mg/L <br />Molybdenum ND mg/L <br />Thallium ND mg/L <br />Uranium ND mg1L <br />Zinc 0.005 mg/L <br />Sample ID. LFB 9 Laboratory Forti fied Blank <br />Aluminum 0.0524 mg/L <br />Antimony 0.0506 mg/L <br />Copper 0.0523 mg/L <br />Iron 1.30 mg/L <br />Manganese 0.0525 mg/L <br />Molybdenum 0.0502 mg/L <br />Thallium 0.0525 mg/L <br />Uranium 0.0520 mg/L <br />Zinc 0.0543 mg/L <br /> <br /> <br />RL %REC Low Limit Report Date: 01/05/11 <br />Work Order: C10110690 <br />High Limit RPD RPDLimit Qua] <br /> Balch: R140353A <br /> Run: ICPMS4-C,.,.101129B 11/30/10 05.41 <br />0.0010 94 70 130 <br />0.050 111 70 130 <br />0.010 97 70 130 <br />0.030 98 70 130 <br />0.010 70 130 A <br />0.0010 99 70 130 <br />0.0010 105 70 130 <br />0.00030 109 70 130 <br />0.010 87 70 130 <br /> Run: ICPMS4-C_„1011298 11/30110 05:48 <br />0.0010 91 70 130 2.6 20 <br />0.050 111 70 130 0.5 20 <br />0.010 95 70 130 2.6 20 <br />0.030 106 70 130 6.3 20 <br />0.010 70 130 1.3 20 A <br />0.0010 105 70 130 5.4 20 <br />0.0010 104 70 130 1.6 20 <br />0.00030 107 70 130 1.1 20 <br />0.010 83 70 130 4,3 20 <br /> Run: ICPMS 4-C-._1011298 11/29/10 19:01 <br />8E-05 <br />0.0002 <br />6E-05 <br />0.0001 <br />2E-05 <br />8E-05 <br />2E-05 <br />8E-06 <br />0.0001 <br /> Run: ICPMS4-C_101129B 11/2911019:08 <br />0.0010 97 85 115 <br />0.0010 100 85 115 <br />0.0010 105 85 115 <br />0.012 104 85 115 <br />0.001 D 105 85 115 <br />0.0010 100 85 115 <br />0.0010 105 85 115 <br />0.00030 104 85 115 <br />0.0010 98 85 115 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />ND - Not detected at the reporting limit. <br />A - The analyle level was greater than lour times the spike level. In <br />accordance with the method % recovery is not calculated. <br />MDC - Minimum detectable concentration <br />Page 19 of 39