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• www.ewgylab.com Helena, w 677- 472 -0711 • Billings, MT 800 -735 -4489 • Casper, WY 888 - 235 -0515 <br />Rwa 1952 Gillette, WY 866 -686 -7175 • Rapid City, SD 888 - 672 -1225 • College Station, TX 888- 690 -2216 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartz GW 3/20/2013 S26877 <br />Analyte Count Result Units <br />Method: A2540 C <br />04/12/13 <br />Sample ID: MB- 1_130322A <br />Method Blank <br />Solids, Total Dissolved TDS @ 180 C <br />ND mg /L <br />Sample ID: LCS- 2_130322A <br />Laboratory Control Sample <br />Solids, Total Dissolved TDS @ 180 C <br />1970 mg /L <br />Sample ID: C13030776 -003A MS <br />Sample Matrix Spike <br />Solids, Total Dissolved TDS @ 180 C <br />80400 mg /L <br />Sample ID: C13030792 -001 B DUP <br />Sample Duplicate <br />Solids, Total Dissolved TDS @ 180 C <br />2040 mg /L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 6 of 21 <br />Report Date: <br />04/12/13 <br />Work Order: <br />C13030792 <br />RL <br />%REC Low Limit High Limit RPD <br />RPDLimit Qual <br />Batch: TDS 130322A <br />Run: BAL -19 130322B <br />03/22/13 14:32 <br />10 <br />Run: BAL -19 130322B <br />03/22/13 14:33 <br />20 <br />99 90 110 <br />Run: BAL -19 130322B <br />03/22/13 14:36 <br />500 <br />99 90 110 <br />Run: BAL-1 9130322B <br />03/22/13 14:38 <br />20 <br />0.8 <br />5 <br />ND - Not detected at the reporting limit. <br />Page 6 of 21 <br />