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www.vwg&b.com Helena, MT 877- 472 -0711 . Billings, UT 600 - 735 -4469 • Casper, WY 888- 235 -0515 <br />w ' AM IN2 Gillette, WY 866 -886 -7175 • Rapid City, SO 88B- 672 -1225 * College Station, TX 888 - 690 -2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Report Date: <br />07/05/13 <br />Project: Schwartz GW 06/07/13 S26942 & S26943 <br />Work Order: <br />C13060291 <br />Analyte Count Result Units <br />RL <br />° /6REC Low Limit High Limit RPD <br />RPDLimit Qual <br />Method: A2540 C <br />Batch: TDS 130612A <br />Sample ID: MB- 1_130612A <br />Method Blank <br />Run: BAL -19 130612A <br />06/12/13 10:44 <br />Solids, Total Dissolved TDS @ 180 C <br />ND mg /L <br />10 <br />Sample ID: LCS- 2_130612A <br />Laboratory Control Sample <br />Run: BAL- 19_130612A <br />06/12/13 10:44 <br />Solids, Total Dissolved TDS @ 180 C <br />2000 mg /L <br />20 <br />100 90 110 <br />Sample ID: C13060255 -005A DUP <br />Sample Duplicate <br />Run: BAL- 19_130612A <br />06/12/13 10:44 <br />Solids, Total Dissolved TDS @ 180 C <br />478 mg /L <br />10 <br />1.2 <br />5 <br />Sample ID: C13060255 -010A MS <br />Sample Matrix Spike <br />Run: BAL- 19_130612A <br />06/12/13 10:45 <br />Solids, Total Dissolved TDS @ 180 C <br />1400 mg /L <br />11 <br />100 90 110 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 8 of 24 <br />