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www.erwolab.com I Helena, MT 877- 472 -0711 • Billings, MT 600- 135 -4489 • Casper, WY 888- 235 -8515 <br />Ieay"ExahmSka IM J Gillette, WY 866 -686 -7175 • Rapid City, SO 886 -672 -1225 • College Station, TX 888 - 698 -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 SW 05/08/13 <br />S26872 <br />Work Order: <br />C13050363 <br />Analyte <br />Count Result Units <br />RL <br />° /.REC <br />Low Limit High Limit RPD <br />RPDLimit Qual <br />Method: E300.0 <br />Batch: R173471 <br />Sample ID: ICB- 051013 <br />2 Method Blank <br />Run: IC2- C_130510A <br />05/10/13 09:59 <br />Chloride <br />ND mg /L <br />0.03 <br />Sulfate <br />0.2 mg /L <br />0.07 <br />Sample ID: LFB- 051013 -01 <br />2 Laboratory Fortified Blank <br />Run: IC2- C_130510A <br />05/10/13 13:10 <br />Chloride <br />9.64 mg /L <br />1.0 <br />96 <br />90 110 <br />Sulfate <br />38.6 mg /L <br />1.0 <br />96 <br />90 110 <br />Sample ID: 013050359- 004AMS <br />2 Sample Matrix Spike <br />Run: IC2- C_130510A <br />05/10/13 21:08 <br />Chloride <br />78.4 mg /L <br />1.0 <br />104 <br />90 110 <br />Sulfate <br />829 mg /L <br />4.2 <br />102 <br />90 110 <br />Sample ID: C13050359- 004AMSD <br />2 Sample Matrix Spike Duplicate <br />Run: IC2- C_130510A <br />05/10/13 21:23 <br />Chloride <br />78.9 mg /L <br />1.0 <br />105 <br />90 110 0.6 <br />20 <br />Sulfate <br />830 mg /L <br />4.2 <br />102 <br />90 110 0.1 <br />20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 18 of 26 <br />