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www.ener&b.com � Helena, MT 871472 -0711 • Billings, MT 608- 735 -4489 • Casper, WY 888- 235 -0515 <br />SAC111e? Gillette, WY 866 -686 -7175 • 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: 06/18/13 <br />Project: Schwartz GW 5/15/2013 S26920 & S26921 Work Order: 013050697 <br />FAnalyte Count Result Units RL ° /.REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.8 Analytical Run: ICPMS4- C_130606A <br />Sample ID: ICV Initial Calibration Verification Standard 06/06/13 23:41 <br />Silver 0.0212 mg /L 0.0010 106 90 110 <br />Method: <br />E200.8 <br />Batch: 37569 <br />Sample ID: <br />MB -37569 <br />Method Blank <br />Run: ICPMS4- C_130606A <br />06/07/13 01:02 <br />Silver <br />ND mg /L <br />0.0002 <br />Sample ID: <br />LCS3 -37569 <br />Laboratory Control Sample <br />Run: ICPMS4- C_130606A <br />06/07/13 01:07 <br />Silver <br />0.0500 mg /L <br />0.0010 <br />100 85 115 <br />Sample ID: <br />C13050693 -001 CMS3 <br />Sample Matrix Spike <br />Run: ICPMS4- C_130606A <br />06/07/13 01:28 <br />Silver <br />0.0501 mg /L <br />0.0010 <br />100 70 130 <br />Sample ID: <br />C13050693- 001CMSD3 <br />Sample Matrix Spike Duplicate <br />Run: ICPMS4- C_130606A <br />06/07/13 01:31 <br />Silver <br />0.0494 mg /L <br />0.0010 <br />99 70 130 1.4 <br />20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 13 of 24 <br />