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www.energylab.com Helena, MT 877 - 472 -0711 • Billings, MT 800 -735 -4489 • Casper, WY 888- 235 -0515 <br />AadyEWEx shweMau I-W 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 Report Date: 05/06/13 <br />Project: Schwartz GW 4/11/13 S26889 Work Order: 013040486 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.7 Batch: R172580 <br />Sample ID: 013040435- 008CMSD 5 Sample Matrix Spike Duplicate Run: ICP4- C_130417A 04/17/13 15:04 <br />Potassium 461 mg /L 1.0 89 70 130 1.1 20 <br />Sodium 601 mg /L 2.1 90 70 130 0.0 20 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 9 of 21 <br />