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ENERGY <br />• 40R,41 TRI, <br />www.enerrriab.com <br />kallfalfoes= Nam 1852 <br />Client: Cotter Corporation <br />Project: Schwartz SW 4/14/11 S25710- S25712 <br />Method: E200.7 <br />Sample ID: MB- 110425A <br />Calcium <br />Magnesium <br />Potassium <br />Sodium <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />4 Method Blank <br />ND mg /L <br />ND mg /L <br />ND mg /L <br />ND mg /L <br />Helena, MT 877- 472 -0711 • Billings, MT 800 -735 -4409 • Casper, WY 888- 235 -0515 <br />Gillette, WY 866 -886 -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 />Report Date: 05/18/11 <br />Work Order: C11040527 <br />Analyte <br />Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />0.1 <br />0.05 <br />0.05 <br />0.2 <br />Run: ICP2 -C 110425A <br />Batch: R145139 <br />04/25/11 14:20 <br />Sample ID: LFB 110425A 4 Laboratory Fortified Blank . Run: ICP2 C_110425A 04/25/11 14:24 <br />Calcium 47.4 mg /L 0.50 95 85 115 <br />Magnesium 46.2 mg /L 0.50 92 85 115 <br />Potassium 48.9 mg /L 3.3 98 85 115 <br />Sodium 49.3 mg /L 0.50 99 85 115 <br />Sample ID: C11040507 007BMS2 4 Sample Matrix Spike Run: ICP2- C_110425A 04/25/11 20:34 <br />Calcium 95.2 mg /L 1.0 93 70 130 <br />Magnesium 95.9 mg /L 1.0 94 70 130 <br />Potassium 86.0 mg /L 1.0 84 70 130 <br />Sodium 106 mg /L 1.0 99 70 130 <br />Sample ID: C11040507 007BMSD 4 Sample Matrix Spike Duplicate Run: ICP2- C_110425A 04/25/11 20:39 <br />Calcium 95.5 mg /L 1.0 94 70 130 0.3 20 <br />Magnesium 96.7 mg /L 1.0 95 70 130 0.9 20 <br />Potassium 86.8 mg /L 1.0 85 70 130 0.9 20 <br />Sodium 105 mg /L 1.0 98 70 130 0.6 20 <br />ND - Not detected at the reporting limit. <br />Page 13 of 30 <br />