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• - www.erserdab.com Helena, W 877 - 472 -0711 • Billings, MT 800 - 7354489 • Casper, WY 888- 235 -0515 <br />} A'"M 'SaB'r932 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 />Client: Cotter Corporation <br />Report Date: <br />09/30/14 <br />Project: Schwartz -GW 9/16/14 S27663 <br />Work Order: <br />C14090659 <br />Analyte Count Result Units <br />RL <br />%REC Low Limit High Limit RPD <br />RPDLimit Qual <br />Method: A2540 C <br />Batch: TDS140919A <br />Lab ID: MB-1140919A <br />Method Blank <br />Run: BAL -19 140919B <br />09/19/14 09:27 <br />Solids, Total Dissolved TDS @ 180 C <br />ND mg /L <br />7 <br />Lab ID: LCS- 2_140919A <br />Laboratory Control Sample <br />Run: BAL- 19_140919B <br />09/19/14 09:27 <br />Solids, Total Dissolved TDS @ 180 C <br />1110 mg /L <br />11 <br />100 90 110 <br />Lab ID: 014090659 -001A MS <br />Sample Matrix Spike <br />Run: BAL- 19_140919B <br />09/19/14 09:28 <br />Solids, Total Dissolved TDS @ 180 C <br />4690 mg /L <br />20 <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 3 of 13 <br />