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ENERGY <br />A- K31A1OW - s <br />www.enefgylab.com <br />Aerbticalfrathent rswa 1952 <br />Client: Cotter Corporation <br />Project: Schwartz GW 5/12/2011 S25787 <br />Helena, MT 877 - 472 -0711 • Billings, MT 800- 735 -4489 • Casper, WY 888- 235 -0515 <br />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 />Analyte <br />Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E245.1 <br />Sample ID: MB -29883 <br />Mercury <br />Method Blank <br />ND mg /L <br />Laboratory Control Sample <br />0.00010 <br />Run: CVAA_C203_110518A <br />Run: CVAA_C203_110518A <br />0.00450 mg /L 0.00010 90 90 110 <br />Run: CVAA_C203_110518A <br />Sample ID: LCS - 29883 <br />Mercury <br />Sample ID: C11040905 003CMS Sample Matrix Spike <br />0.00479 mg /L 0.00010 96 85 115 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Report Date: 06/15/11 <br />Work Order: C11050500 <br />Batch: 29883 <br />05/18/11 10:14 <br />05/18/11 10:15 <br />05/18/11 10:39 <br />Mercury <br />Sample ID: C11040905 003CMSD Sample Matrix Spike Duplicate Run: CVAA_C203_110518A 05/18/11 10:40 <br />Mercury 0.00492 mg /L 0.00010 98 85 115 2.9 10 <br />Page 11 of 20 <br />