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www.erweab.com Helena, MT 877 - 472 -0711 - Billings, MT 800- 735 -4489 • Casper, WY 888 -235 -1515 <br />J <br />E=d% A-'JV Gillette, WY 866 -806 -7175 • Rapid City, SO 886 -672 -1225 • College Station, TX 868 - 690 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Report Date: <br />06/06/13 <br />Project: Schwartz GW 5/15/13 S26918 & S26919 <br />Work Order: <br />C13050708 <br />[Analyte Count Result Units <br />RL <br />%REC Low Limit High Limit RPD <br />RPDLimit Qual <br />Method: A2540 C <br />Batch. TDS130520B <br />Sample ID: MB- 1_130520B <br />Method Blank <br />Run: BAL -19 130520C <br />05/21/13 08:19 <br />Solids, Total Dissolved TDS @ 180 C <br />ND mg /L <br />10 <br />Sample ID: LCS- 2_130520B <br />Laboratory Control Sample <br />Run: BAL- 19_130520C <br />05/21/13 08:19 <br />Solids, Total Dissolved TDS @ 180 C <br />1910 mg /L <br />20 <br />95 90 110 <br />Sample ID: C13050703 -0078 MS <br />Sample Matrix Spike <br />Run: BAL- 19_130520C <br />05/21/13 08:25 <br />Solids, Total Dissolved TDS @ 180 C <br />1530 mg /L <br />11 <br />93 90 110 <br />Sample ID: C13050708 -001A DUP <br />Sample Duplicate <br />Run. BAL- 19_130520C <br />05/21/13 08:27 <br />Solids, Total Dissolved TDS @ 180 C <br />1320 mg /L <br />10 <br />0.5 <br />5 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 8 of 25 <br />