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\ www.mdab.com Helena, MT 877 -472 -0711 • Billings, MT 800- 735 -4489 • Casper, WY 888- 235 -0513 <br />°e° tit Gillette, WY 866 -686 -1175 • Rapid City, SO 888- 672 -1225 • College station, TIt 888- 690 -2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 06/11/13 <br />Project: Schwartz GW 05/18/13 S26985 & S26986 Work Order: C13050721 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.7 <br />Batch: R174382 <br />Sample ID: MB- 130604A <br />5 Method Blank <br />Run: ICP4- C_130604A <br />06/04/13 14:08 <br />Calcium <br />ND <br />mg /L <br />0.02 <br />Iron <br />ND <br />mg /L <br />0 002 <br />Magnesium <br />0.07 <br />mg /L <br />0.01 <br />Potassium <br />ND <br />mg /L <br />0.04 <br />Sodium <br />ND <br />mg /L <br />0.2 <br />Sample ID: LFB- 130604A <br />5 Laboratory Fortified Blank <br />Run: ICP4- C_130604A <br />06/04/13 14:11 <br />Calcium <br />47.3 <br />mg /L <br />0.50 <br />95 85 <br />115 <br />Iron <br />0.965 <br />mg /L <br />0.030 <br />96 85 <br />115 <br />Magnesium <br />47.3 <br />mg /L <br />050 <br />94 85 <br />115 <br />Potassium <br />47.3 <br />mg /L <br />0.50 <br />95 85 <br />115 <br />Sodium <br />47.7 <br />mg /L <br />0.50 <br />95 85 <br />115 <br />Sample ID: C13050737- 003BMS2 <br />5 Sample Matrix <br />Spike <br />Run: ICP4- C_130604A <br />06/04/13 17:54 <br />Calcium <br />154 <br />mg /L <br />1.0 <br />95 70 <br />130 <br />Iron <br />1.97 <br />mg /L <br />0.030 <br />97 70 <br />130 <br />Magnesium <br />110 <br />mg /L <br />1.0 <br />97 70 <br />130 <br />Potassium <br />106 <br />mg /L <br />1.0 <br />98 70 <br />130 <br />Sodium <br />119 <br />mg /L <br />1.0 <br />97 70 <br />130 <br />Sample ID: C13050737- 003BMSD <br />5 Sample Matrix <br />Spike Duplicate <br />Run: ICP4- C_130604A <br />06/04/13 17:58 <br />Calcium <br />156 <br />mg /L <br />1.0 <br />96 70 <br />130 0.8 <br />20 <br />Iron <br />1.97 <br />mg /L <br />0.030 <br />97 70 <br />130 0.1 <br />20 <br />Magnesium <br />110 <br />mg /L <br />1.0 <br />97 70 <br />130 0.3 <br />20 <br />Potassium <br />106 <br />mg /L <br />1.0 <br />98 70 <br />130 0.2 <br />20 <br />Sodium <br />120 <br />mg /L <br />1.0 <br />98 70 <br />130 0.3 <br />20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 10 of 24 <br />