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www.erog0ab.com r Helena, MT 677 -472 -0711 + Billings, W 800- 735 -4489 • Casper, WY 888 -235 -0515 <br />Gillette, WY 866 -686 -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: 07/08/13 <br />Project: Schwartz GW 6/6/2013 S26941 Work Order: C13060270 <br />Analyte Count Result Units RL ° /.REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E245.1 Analytical Run: CVAA_C203_130612A <br />Sample ID: ICV Initial Calibration Verification Standard 06/12/13 14.07 <br />Mercury 0.00529 mg /L 0.00010 106 90 110 <br />Method: <br />Sample ID: <br />Mercury <br />E245.1 <br />IPC <br />Instrument Performance Check Sample <br />0.00520 mg /L 0.00010 <br />104 <br />Run: CVAA_C203_130612A <br />95 105 <br />Batch: 130612A <br />06/12/13 14:14 <br />Method: <br />E245.1 <br />Batch: 37871 <br />Sample ID: <br />MB -37871 <br />Method Blank <br />Run: CVAA C203_130612A <br />06/12/13 14:33 <br />Mercury <br />ND mg /L <br />7E -05 <br />Sample ID: <br />LCS -37871 <br />Laboratory Control Sample <br />Run: CVAA_C203_130612A <br />06/12/13 14:35 <br />Mercury <br />000557 mg /L <br />0.00010 <br />111 <br />85 115 <br />Sample ID: <br />C13060291- 001DMS <br />Sample Matrix Spike <br />Run: CVAA_C203_130612A <br />06/12/13 14:59 <br />Mercury <br />0.00539 mg /L <br />0.00010 <br />108 <br />70 130 <br />Sample ID: <br />013060291- 001DMSD <br />Sample Matrix Spike Duplicate <br />Run: CVAA_C203_130612A <br />06/12/13 15:01 <br />Mercury <br />0.00532 mg /L <br />0.00010 <br />106 <br />70 130 14 <br />10 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 13 of 21 <br />