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www.energylab.com 1 Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 <br />AnifjtiMEneflaneeSimi 1152 Gillette, WY 866-686-7175 . Rapid City, SO 88B-672-1225 • College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Mine <br />Report Date: 09/27/10 <br />Work Order: C10080962 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.8 Batch: R136941 <br />Sample ID: C10081002-001CMS4 10 Sample Matrix Spike Run: ICPMS2-C_100907A 09/07/10 13:39 <br />Copper 0.050 mg/L 0.010 96 70 130 <br />Lead 0.051 mg/L 0.0010 101 70 130 <br />Molybdenum 0.049 mg/L 0.0010 94 70 130 <br />Silver 0.019 mg/L 0.010 95 70 130 <br />Thallium 0.051 mg/L 0.00040 101 70 130 <br />Uranium 0.054 mg/L 0.00030 104 70 130 <br />Zinc 0.065 mg/L 0.010 125 70 130 <br />Sample ID: C1 0081002-001 CMSD 10 Sample Matrix Spike Duplicate Run: ICPMS2-C_100907A 09/07/10 13:46 <br />Antimony 0.057 mg/L 0.0010 115 70 130 7.6 20 <br />Arsenic 0.057 mg/L 0.0010 109 70 130 5.2 20 <br />Chromium 0.053 mg/L 0.0010 104 70 130 7.5 20 <br />Copper 0.052 mg/L 0.010 101 70 130 4.9 20 <br />Lead 0.054 mg/L 0.0010 107 70 130 6 20 <br />Molybdenum 0.053 mg/L 0.0010 102 70 130 8.1 20 <br />Silver 0.020 mg/L 0.010 100 70 130 5.1 20 <br />Thallium 0.054 mg/L 0.00040 107 70 130 5.9 20 <br />Uranium 0.058 mg/L 0.00030 111 70 130 6.2 20 <br />Zinc 0.054 mg/L 0.010 104 70 130 17 20 <br />Method: E200.8 Batch: R136716A <br />Sample ID: C10081031-002CMS4 2 Sample Matrix Spike Run: ICPMS4-C_100831A 09/01/10 10:26 <br />Boron 0.116 mg/L 0.10 96 70 130 <br />Iron 1.25 mg/L 0.030 99 70 130 <br />Sample ID: C10081031-002CMSD 2 Sample Matrix Spike Duplicate Run: ICPMS4-C_100831A 09/01/10 10:33 <br />Boron 0.116 mg/L 0.10 96 70 130 0 20 <br />Iron 1.28 mg/L 0.030 102 70 130 2.3 20 <br />Sample ID: LRB 2 Method Blank Run: ICPMS4-C_100831A 08/31/10 12:50 <br />Boron 0.0004 mg/L <br />Iron ND mg/L 0.0001 <br />Sample ID: LFB 2 Laboratory Fortified Blank Run: ICPMS4-C_100831A 08/31/10 12:57 <br />Boron 0.0500 mg/L 0.0010 99 85 115 <br />Iron 1.28 mg/L 0.012 102 85 115 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 23 of 44