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• www.energylab.com WHelena, MT 877-472-0711 • Billings, MT 800-735-4489 + Casper, WY 888-235-0515 <br />_ r AnslnicsMfrcetkomSincr 1952 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 Report Date: 09/27/10 <br />Project: Schwartzwalder Mine Work Order: C10080962 <br /> <br />Analyte C ount Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.8 Batch: 27276 <br />Sample ID: MB-27276 3 Method Blank Run: ICPMS2-C_100907A 09/08/10 03:35 <br />Antimony ND mg/L 0.0002 <br />Molybdenum ND mg/L 0.0001 <br />Silver 0.0003 mg/L 0.0002 <br />Sample ID: LCS3-27276 3 Laboratory Con trol Sample Run: ICPMS2-C_100907A 09/08/10 03:42 <br />Antimony 0.573 mg/L 0.050 115 85 115 <br />Molybdenum 0.557 mg/L 0.10 111 85 115 <br />Silver 0.0563 mg/L 0.010 112 85 115 <br />Sample ID: C10081083-002CMS3 3 Sample Matrix Spike Run: ICPMS2-C-100907A 09/08/10 04:16 <br />Antimony 0.552 mg/L 0.050 110 70 130 <br />Molybdenum 0.548 mg/L 0.10 109 70 130 <br />Silver 0.0517 mg/L 0.010 103 70 130 <br />Sample ID: 010081083-002CMSD 3 Sample Matrix Spike Duplicate Run: ICPMS2-C_100907A 09/08/10 04:49 <br />Antimony 0.578 mg/L 0.050 116 70 130 4.5 20 <br />Molybdenum 0.581 mg/L 0.10 116 70 130 5.9 20 <br />Silver 0.0540 mg/L 0.010 108 70 130 4.4 20 <br />Method: E200.8 Batch: R136941 <br />Sample ID: LRB 10 Method Blank Run: ICPMS2-C_100907A 09/07/10 11:58 <br />Antimony 0.0001 mg/L 7E-05 <br />Arsenic ND mg/l- 6E-05 <br />Chromium ND mg/L 4E-05 <br />Copper ND mg/L 7E-05 <br />Lead ND mg/L 3E-05 <br />Molybdenum 8E-05 mg/L 5E-05 <br />Silver 5E-05 mg/L 3E-05 <br />Thallium ND mg/L 1 E-05 <br />Uranium ND mg/L 1E-05 <br />Zinc 0.001 mg/L 0.0003 <br />Sample ID: LFB 10 Laboratory Forti fied Blank Run: ICPMS2-C_100907A 09/07/10 12:05 <br />Antimony 0.0527 mg/L 0.0010 105 85 115 <br />Arsenic 0.0530 mg/L 0.0010 106 85 115 <br />Chromium 0.0512 mg/L 0.0010 102 85 115 <br />Copper 0.0504 mg/L 0.0010 101 85 115 <br />Lead 0.0524 mg/L 0.0010 105 85 115 <br />Molybdenum 0.0518 mg/L 0.0010 103 85 115 <br />Silver 0.0177 mg/L 0.0010 88 85 115 <br />Thallium 0.0522 mg/L 0.0010 104 85 115 <br />Uranium 0.0536 mg/L 0.00030 107 85 115 <br />Zinc 0.0527 mg/L 0.0010 103 85 115 <br />Sample ID: C10081002-001CMS4 10 Sample Matrix Spike Run: ICPMS2-C_100907A 09/07/10 13:39 <br />Antimony 0.053 mg/L 0.0010 107 70 130 <br />Arsenic 0.054 mg/L 0.0010 103 70 130 <br />Chromium 0.050 mg/L 0.0010 96 70 130 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 22 of 44