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• wvrn.energylab.com i~ Helena, MT 877-472-0711 *Billings, MT 800-735-4489 -Casper, WY 888-235-0515 <br />AnatyticolLrealleoceSince 1951 Gillette, WY OSS-686-7175 -Rapid City, SO 888-672-1225 + College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 12/10/10 <br />Project: Schwartzwalder Water Monitoring Program - SW Work Order: C10110203 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qua[ <br />Method: E200.7 Batch: R140483 <br />Sample ID: C10110203-001CMSD 4 Sample Matrix Spike Duplicate Run: ICP2-C_101201A 12/01/1014:00 <br />Calcium 133 mg/L 1.0 97 70 130 1.1 20 <br />Magnesium 105 mg/L 1.0 94 70 130 0.2 20 <br />Potassium 88.8 mg/L 1.0 85 70 130 1.2 20 <br />Sodium 109 mg/L 1.0 93 70 130 1.3 20 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 21 of 43