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www.ererz4ab.com Helena, MT 877 -472 -0711 a Billings, MT 800 - 735 -4489 a Casper, WY 888- 235 -0515 <br />Q'Mw'tM Gillette, WY 866 -886 -1175 • Rapid City, SO 886- 672 -1225 • College Station, TX 888 - 690 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 08/20/13 <br />Project: Schwartz GW 7/23/13 S27081 Work Order: 013070939 <br />Analyte Count Result Units RL ° /.REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.8 Analytical Run: ICPMS2- C_130808C <br />Sample ID: ICV 2 Initial Calibration Verification Standard 08/08/13 14:05 <br />Arsenic 0.0520 mg /L 0.0010 104 90 110 <br />Uranium 0.0521 mg /L 0.00030 104 90 110 <br />Method: <br />E200.8 <br />Batch: 38461 <br />Sample ID: <br />MB -38461 <br />2 <br />Method Blank <br />Run: ICPMS2- C_130808C <br />08/09/13 03:58 <br />Arsenic <br />0.0008 mg /L <br />0.0003 <br />Uranium <br />ND mg /L <br />9E -06 <br />Sample ID: <br />LCS3 -38461 <br />2 <br />Laboratory Control Sample <br />Run: ICPMS2- C_130808C <br />08/09/13 04:01 <br />Arsenic <br />0.483 mg /L <br />0.0010 <br />97 <br />85 115 <br />Uranium <br />0.560 mg /L <br />0.00030 <br />112 <br />85 115 <br />Sample ID: <br />C13070930- 001BMS3 <br />2 <br />Sample Matrix Spike <br />Run: ICPMS2- C_130808C <br />08/09/13 04:20 <br />Arsenic <br />0.508 mg /L <br />0.0015 <br />101 <br />70 130 <br />Uranium <br />0.570 mg /L <br />0.00030 <br />113 <br />70 130 <br />Sample ID: <br />C13070930 -001 BMSD3 <br />2 <br />Sample Matrix Spike Duplicate <br />Run: ICPMS2- C_130808C <br />08/09/13 04:23 <br />Arsenic <br />0.511 mg /L <br />0.0015 <br />102 <br />70 130 0.5 <br />20 <br />Uranium <br />0.547 mg /L <br />0.00030 <br />108 <br />70 130 4.2 <br />20 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 6 of 12 <br />