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www.ewdeb.com Helena, W $77472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 <br />AMOMWfxr aShm fi ff Gillette, WY 666-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-1218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program SW <br />LAnalyte Count Result Units <br />Method: E200.7 <br />Sample ID: MB-101110A 5 Method Blank <br />Calcium ND mg/L <br />Magnesium ND mg/L <br />Potassium ND mg/L <br />Sodium ND mg/L <br />Zinc ND mg/L <br />Sample ID: LFB-101110A 5 Laboratory Fortified Blank <br />Calcium 48.4 mg/L <br />Magnesium 48.2 mg/L <br />Potassium 43.6 mg/L <br />Sodium 48.7 mg/L <br />Zinc 0.946 mg/L <br />Sample ID: C1 0101 1 22-003CMS2 5 Sample Matrix Spike <br />Calcium 148 mg/L <br />Magnesium 106 mg/L <br />Potassium 89.1 mg/L <br />Sodium 118 mg/L <br />Zinc 1.94 mg/L <br />Sample ID: 010101122-003CMSD 5 Sample Matrix Spike Duplicate <br />Calcium 152 mg/L <br />Magnesium 110 mg/L <br />Potassium 90.0 mg/L <br />Sodium 121 mg/L <br />Zinc 2.01 mg/L <br />Report Date: 11 /29/10 <br />Work Order: 010101013 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: R139733 <br />Run: ICP2-C_101110A 11/10/10 12:46 <br />0.2 <br />0.05 <br />0.02 <br />0.3 <br />0.001 <br /> Run: ICP2-C_101110A 11/10/10 12:50 <br />0.50 97 85 115 <br />0.50 96 85 115 <br />0.50 87 85 115 <br />0.50 97 85 115 <br />0.010 95 85 115 <br /> Run: ICP2-C_101110A 11/10/10 14:47 <br />1.0 96 70 130 <br />1.0 94 70 130 <br />1.0 85 70 130 <br />1.0 96 70 130 <br />0.010 95 70 130 <br /> Run: ICP2-C_101110A 11/10/10 14:51 <br />1.0 100 70 130 3.0 20 <br />1.0 98 70 130 3.6 20 <br />1.0 86 70 130 1.0 20 <br />1.0 98 70 130 1.9 20 <br />0.010 98 70 130 3.5 20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 13 of 32