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r wwwzwgoab.com i Helena, MT 877 - 472 -0711 • Billings, MT 600 -735 -4489 • Casper, WY 888- 235 -8515 <br />Gillette, NAY 866 -686 -7175 • Rapid City, SD 8BB- 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: 06/04/13 <br />Project: Schwartz SW 05/10/13 S26874 & S26875 & S26926 -S269 Work Order: C13050437 <br />Analyte Count Result Units RL ° /.,REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.7 Batch: R174170 <br />Sample ID: C13050521- 003BMSD2 5 Sample Matrix Spike Duplicate Run: ICP4- C_130529A 05/29/13 23:29 <br />Potassium 243 mg /L 1.0 91 70 130 3.9 20 <br />Sodium 453 mg /L 1.0 87 70 130 2.7 20 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 19 of 40 <br />