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www.erwmflab.corn i Helena, MT 877 -472 -0711 • Billings, W 800- 735 -4489 • Casper, WY 888- 235 -0515 <br />LI ' AQ'View IM ; Gillette, wY 866- 686 -7175 • Rapid City, SO 886 -672 -1225 • College Station, TX 888 -690 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 07/08/13 <br />Project: Schwartz GW 6/6/2013 S26941 Work Order: C13060270 <br />[Analyte Count Result Units RL ° /.REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E300.0 Analytical Run: IC2- C_130610A <br />Sample ID: CCV- 061013 -02 2 Continuing Calibration Verification Standard 06/10/13 17:15 <br />Chloride 9.98 mg /L 1.0 100 90 110 <br />Sulfate 39.7 mg /L 1.0 99 90 110 <br />Method: <br />E300.0 <br />Batch: R174604 <br />Sample ID: <br />ICB- 061013 <br />2 <br />Method Blank <br />Chloride <br />ND mg /L <br />Sulfate <br />ND mg /L <br />Sample ID: <br />LFB- 061013 <br />2 <br />Laboratory Fortified Blank <br />Chloride <br />97 <br />90 110 <br />9.74 mg /L <br />Sulfate <br />98 <br />90 110 <br />39.2 mg /L <br />Sample ID: <br />C13060255- 014AMS <br />2 <br />Sample Matrix Spike <br />Chloride <br />97 <br />90 110 <br />26.5 mg /L <br />Sulfate <br />95 <br />90 110 <br />102 mg /L <br />Sample ID: <br />C13060255- 014AMSD <br />2 <br />Sample Matrix Spike Duplicate <br />Chloride <br />98 <br />90 110 0.4 <br />26.6 mg /L <br />Sulfate <br />95 <br />90 110 0.1 <br />102 mg /L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 14 of 21 <br />Batch: R174604 <br />Run: IC2- C_13061 CA <br />06/10/13 13:24 <br />0.03 <br />0.07 <br />Run: IC2- C_130610A <br />06/10/13 13:39 <br />1.0 <br />97 <br />90 110 <br />1.0 <br />98 <br />90 110 <br />Run: IC2- C_130610A <br />06/10/13 18:02 <br />1.0 <br />97 <br />90 110 <br />1.7 <br />95 <br />90 110 <br />Run: IC2- C_130610A <br />06/10/13 18:17 <br />1.0 <br />98 <br />90 110 0.4 <br />20 <br />1.7 <br />95 <br />90 110 0.1 <br />20 <br />ND - Not detected at the reporting limit. <br />Page 14 of 21 <br />