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www.energylab.com Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 <br />Analyticet Excellence Since 195Y Gillette, WY 866-686-7175 + Rapid City, SD 888-672-1225 • College Station, TX 888-690-2216 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program <br />Report Date: 09/14/10 <br />Work Order: C10080305 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Cual 1 <br />Method: E200.8 Batch: R136197 <br />Sample ID: C10080305-001CMS4 8 Sample Matrix Spike Run: ICPMS4-C_100817A 08/18/10 21:19 <br />Selenium 0.0542 mg/L 0.0010 108 70 130 <br />Silver 0.0154 mg/L 0.010 77 70 130 <br />Uranium 0.0534 mg/L 0.00030 107 70 130 <br />Zinc 0.136 mg/L 0.010 101 70 130 <br />Sample ID: C10080305-001CMSD 8 Sample Matrix Spike Duplicate Run: ICPMS4-C_100817A 08/18/10 21:54 <br />Arsenic 0.0560 mg/L 0.0010 112 70 130 2.9 20 <br />Cadmium 0.0518 mg/L 0.010 103 70 130 1.1 20 <br />Copper 0.0543 mg/L 0.010 107 70 130 2.9 20 <br />Nickel 0.0582 mg/L 0.050 108 70 130 2.4 20 <br />Selenium 0.0557 mg/L 0.0010 111 70 130 2.7 20 <br />Silver 0.0172 mg/L 0.010 86 70 130 11 20 <br />Uranium 0.0544 mg/L 0.00030 109 70 130 2 20 <br />Zinc 0.140 mg/L 0.010 108 70 130 2.5 20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 12 of 21