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Helena Mi B77-472-0711 • Biliin93, MT 800-735 4489 • Caspar WY 888 235-051 <br />www.energylab.com <br />' ,? 4nlrticalExeeuease Slrrcr 1952 Gillette, WY 866-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Report Date: 01 /19/11 <br />Client: Cotter Corporation Work Order: 010120711 <br />Project: Schwartzwalder Mine <br />Count Result Units RL %,REC Low Limit High Limit RPD RPDLimit Qual <br />Analyte Batch: 28618 <br />Method: E200.8 12/29/1013:12 <br />Run: ICP MS2-C_101228A <br />Sample ID: MB-28618 4 Method Blank <br /> ND mg/L 0.0003 <br />Antimony ND mg/L 0.0008 <br />Arsenic <br />ND mg/L <br />0.0004 <br />Thallium ND mg/L 6E-05 <br />Uranium <br />1 01 228A <br />Run: ICPMS2-C <br />12/29/10 13:19 <br />Sample ID: LCS3-28618 4 Laboratory Control Sample _ <br />85 115 <br /> 0.55 mg/L 0.0010 111 <br />Antimony <br />0.47 mg/L <br />0.0010 <br />94 115 <br />85 <br />Arsenic <br />0.48 mg/L <br />0.00040 <br />97 115 <br />85 <br />Thallium 0.54 mg/L 0.00030 108 85 115 <br />Uranium <br />101228A <br />Run:ICPMS2-C <br />12/29/1014:40 <br />Sample ID: C10120700-001CMS3 4 Sample Matrix Spike _ <br />130 <br /> 0.59 mg/L 0.0010 117 70 <br />Antimony 0.51 mg/L 0.0010 103 70 130 <br />Arsenic 0.53 mg/L 0.00040 105 70 130 <br />Thallium <br />0.58 mg/L <br />0.00030 <br />116 <br />70 130 <br />Uranium 101228A <br />RUn:ICPMS2-C 12/29/1014:47 <br />Sample ID: C10120700-001CMSD 4 Sample Matrix Spike Duplicate _ <br />9 <br />130 5 <br />20 <br />Antimony 0.55 mg/L 0.0010 110 <br />97 . <br />70 <br />70 130 6.2 20 <br />Arsenic 0.48 mg/L <br />49 mg/L <br />0 0.0010 <br />0.00040 <br />98 <br />70 130 7.1 <br />20 <br />Thallium . <br />0.53 mg/L <br />0.00030 <br />107 <br />70 130 8.0 20 <br />Uranium <br />Qualifiers: <br />ND Not detected at the reporting limit. <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Page 12 of 23