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www.emdab.com ( Helena, MT 877- 472 -0711 • Billings, MY 800 - 735 -4489 • Casper, WY 888 - 235 -0515 <br />1 J Gillette, wY 866-686 -7175 • Rapid City, SO 886 -672 -1225 • College Station, Tx 888 - 696 -2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 06/27/13 <br />Project: Schwartz SW 5/22/13 S26997 TH S26998 Work Order: C13050907 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.7 Analytical Run: ICP4- C_130611A <br />Sample ID: ICV Initial Calibration Verification Standard 06/11/13 12:10 <br />Potassium 47.3 mg /L 0.50 95 95 105 <br />Sample ID: ICSA Interference Check Sample A 06/11/13 12:24 <br />Potassium 0.0309 mg /L 0.50 <br />Sample ID: ICSAB Interference Check Sample AB 06/11/13 12:28 <br />Potassium 0.0426 mg /L 0.50 <br />Method: E200.7 <br />Batch: R174676 <br />Sample ID: MB- 130611A <br />Method Blank <br />Run: ICP4- C130611 A <br />06/11/1312:47 <br />Potassium <br />ND mg /L <br />0.04 <br />Sample ID: LF13- 130611A <br />Laboratory Fortified Blank <br />Run ICP4- C_130611A <br />06/11/13 12:50 <br />Potassium <br />45.6 mg /L <br />0.50 <br />91 85 115 <br />Sample ID: 013051013- 002BMS2 <br />Sample Matrix Spike <br />Run: ICP4- C_130611A <br />06/11/13 17:33 <br />Potassium <br />276 mg /L <br />1.0 <br />97 70 130 <br />Sample ID: C13051013- 002BMSD <br />Sample Matrix Spike Duplicate <br />Run: ICP4- C_130611A <br />06/11/13 17:36 <br />Potassium <br />278 mg /L <br />1.0 <br />97 70 130 <br />0.6 20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 14 of 29 <br />