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www.snt dabam <br />AaNytlprfixatYecsf6ocat8S? - <br />Me IC03, rd IQ I I-414-UI I oulinga, m1 vvv-ww++w - ..o?Yur ^• ??? <br />a wi 566- s ,4175 • Rapid City, SO 886-672-1225 • College Station, 7X 868-688-2216 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartz-GW 03/30/11 S25671 & S25672 <br />Analyte Count Result Units <br />Method: E200.7 <br />Sample ID: MB-110407A 4 Method Blank <br />Calcium ND mg/L <br />Magnesium ND mg/L <br />Potassium ND mg/L <br />Sodium ND mg/L <br />Sample ID: LFB-110407A 4 Laboratory Fortified Blank <br />Calcium 47.7 mg/L <br />Magnesium 47.8 mg/L <br />Potassium 43.3 mg/L <br />Sodium 48.5 mg/L <br />Sample ID: C11040002-003DMS2 4 Sample Matrix Spike <br />Calcium 211 mg/L <br />Magnesium 118 mg/L <br />Potassium 97.6 mg/L <br />Sodium 344 mg/L <br />Sample ID: C11040002-003DMSD 4 Sample Matrix Spike Duplicate <br />Calcium 211 mg/L <br />Magnesium 119 mg/L <br />Potassium 96.1 mg/L <br />Sodium 344 mg/L <br />Report Date: 04/25/11 <br />Work Order: C11030940 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: R144604 <br />Run: ICP2-C 110407A 04/07/11 17:50 <br />0.40 <br />0.10 <br />0.10 <br />0.60 <br /> Run: ICP2-C_110407A 04/07/11 17:55 <br />0.50 95 85 115 <br />0.50 96 85 115 <br />0.50 87 85 115 <br />0.50 97 85 115 <br /> Run: ICP2-C_110407A 04/07/11 22:14 <br />1.0 93 70 130 <br />1.0 97 70 130 <br />1.0 89 70 130 <br />1.0 95 70 130 <br /> Run: ICP2-C_110407A 04/07/11 22:18 <br />1.0 93 70 130 0.2 20 <br />1.0 97 70 130 0.7 20 <br />1.0 87 70 130 1.5 20 <br />1.0 94 70 130 0.1 20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 9 of 24