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www.er*r#ab.com — ^ Helena, MT 877 -472 -0711 • Billings, MT 800- 735 -4489 • Casper, WY 888- 235 -0515 <br />Aa**xfEwab 'Rac'tM ) Gillette, WY 866 -666 -7175 • Rapid City, SD 88B -672 -1225 • College Station, TX 888 - 690 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />E200.7 <br />Report Date: <br />07/05/13 <br />Project: Schwartz GW 06/12/13 S27034 <br />MB -37915 <br />2 Method Blank <br />Work Order: <br />C13060505 <br />Analyte <br />Count Result Units <br />RL <br />° /diEC <br />Low Limit <br />High Limit RPD <br />RPDLimit Qual <br />Method: E200.7 <br />Zinc <br />0.004 mg /L <br />0.001 <br />Analytical Run: ICP4- C_130620A <br />Sample ID: ICV <br />2 Initial Calibration Verification Standard <br />Sample ID: <br />LCS3 -37915 <br />2 Laboratory Control Sample <br />06/20/13 11:22 <br />Iron <br />4.90 mg /L <br />0.030 <br />98 <br />95 <br />105 <br />0.030 <br />Zinc <br />0.949 mg /L <br />0.010 <br />95 <br />95 <br />105 <br />0.010 <br />Sample ID: ICSA <br />2 Interference Check Sample A <br />Sample ID: <br />C13060538 -001 DMS3 <br />2 Sample Matrix Spike <br />06/20/13 11:36 <br />Iron <br />178 mg /L <br />0.030 <br />89 <br />80 <br />120 <br />0.030 <br />Zinc <br />0.0150 mg /L <br />0.010 <br />Zinc <br />0.466 mg /L <br />0.010 <br />Sample ID: ICSAB <br />2 Interference Check Sample AB <br />Sample ID: <br />C13060538 -001 DMSD3 <br />2 Sample Matrix Spike Duplicate <br />06/20/13 11:40 <br />Iron <br />177 mg /L <br />0.030 <br />89 <br />80 <br />120 <br />0.030 <br />Zinc <br />0.833 mg /L <br />0.010 <br />83 <br />80 <br />120 <br />0.010 <br />Method: <br />E200.7 <br />Batch- 37915 <br />Sample ID: <br />MB -37915 <br />2 Method Blank <br />Run: ICP4- C_130620A <br />06/20/13 15:01 <br />Iron <br />ND mg /L <br />0.004 <br />Zinc <br />0.004 mg /L <br />0.001 <br />Sample ID: <br />LCS3 -37915 <br />2 Laboratory Control Sample <br />Run: ICP4- C_130620A <br />06/20/13 15:05 <br />Iron <br />2.54 mg /L <br />0.030 <br />101 <br />85 115 <br />Zinc <br />0.487 mg /L <br />0.010 <br />97 <br />85 115 <br />Sample ID: <br />C13060538 -001 DMS3 <br />2 Sample Matrix Spike <br />Run ICP4- C_130620A <br />06/20/13 15:42 <br />Iron <br />2.47 mg /L <br />0.030 <br />97 <br />70 130 <br />Zinc <br />0.466 mg /L <br />0.010 <br />92 <br />70 130 <br />Sample ID: <br />C13060538 -001 DMSD3 <br />2 Sample Matrix Spike Duplicate <br />Run: ICP4- C_130620A <br />06/20/13 15:46 <br />Iron <br />2.43 mg /L <br />0.030 <br />95 <br />70 130 1.9 <br />20 <br />Zinc <br />0.449 mg /L <br />0.010 <br />89 <br />70 130 3.7 <br />20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 7 of 21 <br />