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ENERGY <br />A'-SORATORIFS <br />www.lab.com <br />hilt tlal huh= free 1852 <br />Client: Cotter Corporation <br />Project: Schwartz GW 6/23/11 S25850 <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 -872 -1225 • Collage Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Report Date: 07/22/11 <br />Work Order: C11061003 <br />Analyte <br />Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />E245.1 <br />Method: <br />Sample ID: MB -30283 <br />Mercury <br />Sample ID: LCS -30283 <br />Mercury <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Method Blank <br />6E -05 mg /L <br />Laboratory Control Sample <br />0.00480 mg /L <br />Sample ID: C11061003 -001 DMS Sample Matrix Spike <br />Mercury 0.00497 mg /L <br />1 E -06 <br />Run: CVAA_C203_110628A <br />Run: CVAA_C203_110628A <br />0.00010 95 90 110 <br />Run: CVAA_C203_110628A <br />0.00010 98 85 115 <br />Batch: 30283 <br />06/28/11 13:29 <br />06/28/11 13:30 <br />06/28/11 13:33 <br />Sample ID: C11061003- 001DMSD Sample Matrix Spike Duplicate Run: CVAA_C203_110628A 06/28/11 13:34 <br />Mercury 0.00450 mg /L 0.00010 89 85 115 9.8 10 <br />ND - Not detected at the reporting limit. <br />Page 12 of 21 <br />