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\ ' www.energylaG.caa i Helena, MT 877 -472 -0711 a Billings, MT 800- 735 -4469 a Casper, WY 888- 235 -6515 <br />AethtleilEre,J4aoasmcr 1152 J' Gillette, WY 866- 686 -7175 a Rapid City, SO 886 -672 -1225 a College Station, TX 888 - 698 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />E300.0 <br />Report Date: <br />07/16/13 <br />Project: Schwartz GW 6/20/1 S27008 & S2009 <br />Work Order: <br />C13060813 <br />FAnalyte <br />Count Result Units RL ° /aREC Low Limit <br />High Limit RPD <br />RPDLimit Qual <br />Method: E300.0 <br />Sulfate <br />Analytical Run: IC2- C_130624A <br />Sample ID: CCV- 062413 -02 <br />2 Continuing Calibration Verification Standard <br />Sample ID: <br />06/24/13 19:11 <br />Chloride <br />9.93 mg /L 1.0 99 90 <br />110 <br />Sulfate <br />38.5 mg /L 1.0 96 90 <br />110 <br />1.0 <br />Method: <br />E300.0 <br />Sample ID: <br />ICB- 062413 <br />2 <br />Method Blank <br />Chloride <br />06/24/1314:49 <br />0.03 <br />ND mg /L <br />Sulfate <br />0.2 mg /L <br />Sample ID: <br />LFB- 062413 -01 <br />2 <br />Laboratory Fortified Blank <br />Chloride <br />Run: IC2- C_130624A <br />9.66 mg /L <br />Sulfate <br />1.0 <br />97 <br />386 mg /L <br />Sample ID: <br />LFBD - 062413 -02 <br />2 <br />Laboratory Fortified Blank Duplicate <br />Chloride <br />9.75 mg /L <br />Sulfate <br />Run: IC2- C_130624A <br />38.9 mg /L <br />Sample ID: <br />C13060813 -001 BMS <br />2 <br />Sample Matrix Spike <br />Chloride <br />1.0 <br />97 <br />780 mg /L <br />Sulfate <br />20 <br />891 mg /L <br />Sample ID: <br />C13060813 -001 BMSD <br />2 <br />Sample Matrix Spike Duplicate <br />Chloride <br />90 110 <br />78.4 mg /L <br />Sulfate <br />101 <br />90 110 <br />891 mg /L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 15 of 23 <br />Batch: R175218 <br />Run: IC2 -C 130624A <br />06/24/1314:49 <br />0.03 <br />0.07 <br />Run: IC2- C_130624A <br />06/24/13 15.19 <br />1.0 <br />97 <br />90 110 <br />1.0 <br />96 <br />90 110 <br />Run: IC2- C_130624A <br />06/24/13 15:35 <br />1.0 <br />98 <br />90 110 <br />0.9 <br />20 <br />1.0 <br />97 <br />90 110 <br />0.8 <br />20 <br />Run: IC2- C_130624A <br />06/24/13 21:14 <br />1.0 <br />102 <br />90 110 <br />4.2 <br />101 <br />90 110 <br />Run: IC2- C_130624A <br />06/24/13 21:30 <br />1.0 <br />103 <br />90 110 <br />0.6 <br />20 <br />4.2 <br />101 <br />90 110 <br />0.0 <br />20 <br />ND - Not detected at the reporting limit. <br />Page 15 of 23 <br />