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\ www.vw&43b.com I Helena, MT 877- 472 -0711 • Billings, MT 806 -735 -4489 • Casper, WY 888 -235 -0515 <br />"rytlatEwMwaSdw iD3Y J 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 />06/18/13 <br />Project: Schwartz GW 5/15/2013 S26920 & S26921 <br />Work Order: <br />C13050697 <br />Analyte <br />Count Result Units <br />RL <br />%REC <br />Low Limit High Limit RPD <br />RPDLimit Dual <br />Method: E300.0 <br />Batch: R173807 <br />Sample ID: ICB- 052013 <br />2 Method Blank <br />Run: IC2 -C 130520A <br />05/20/13 13:53 <br />Chloride <br />ND mg /L <br />0.03 <br />Sulfate <br />009 mg /L <br />0.07 <br />Sample ID: LFB- 052013 -01 <br />2 Laboratory Fortified Blank <br />Run: IC2- C_130520A <br />05/20/13 14:09 <br />Chloride <br />9.92 mg /L <br />1.0 <br />99 <br />90 110 <br />Sulfate <br />39.4 mg /L <br />1.0 <br />98 <br />90 110 <br />Sample ID: 013050697- 001BMS <br />2 Sample Matrix Spike <br />Run: IC2- C_130520A <br />05120/13 14:55 <br />Chloride <br />20.1 mg /L <br />1.0 <br />99 <br />90 110 <br />Sulfate <br />121 mg /L <br />1.0 <br />98 <br />90 110 <br />Sample ID: 013050697 -001 BMSD <br />2 Sample Matrix Spike Duplicate <br />Run: IC2- C_130520A <br />05/20/13 15:10 <br />Chloride <br />20.2 mg /L <br />1.0 <br />100 <br />90 110 0.4 <br />20 <br />Sulfate <br />121 mg /L <br />1.0 <br />99 <br />90 110 0.3 <br />20 <br />Qualifiers: <br />RL - Analyte reporting limit ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 15 of 24 <br />