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www.energylah.com Helena MT 877-472-0711 * Billings, MT 800-735.4489 * Casper, WY 868-235-0515 <br />anWtytteat FxcelencWSkee test J Gillette, WY 866-686.7175 * Rapid City, SO 888-672-1225 * College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program <br />Report Date: 09/09/10 <br />Work Order: C10080639 <br />A <br />l C <br />t R <br />lt U <br />it RL %REC L <br />Li <br />it Hi <br />h Li <br />i l <br />RPD RPDLi <br />i <br />Q <br />na <br />yte oun <br />esu n <br />s ow <br />m <br />g <br />m <br />t ua <br />m <br />t <br />I <br />Method: E200.7 Batch: R136424 <br />Sample ID: MB-100824A 3 Method Blank Run: ICP2-C_100824A 08/24/10 12:36 <br />Chromium ND mg/L 0.002 <br />Iron ND mg/L 0.002 <br />Manganese ND mg/L 0.0004 <br />Sample ID: LFB-100824A 3 Laboratory Fortified Blank Run: ICP2-C_100824A 08/24/10 12:40 <br />Chromium 0.964 mg/L 0.050 96 85 115 <br />Iron 0.986 mg/L 0.030 99 85 115 <br />Manganese 0.961 mg/L 0.010 96 85 115 <br />Sample ID: C10080651-001BMS2 3 Sample Matrix Spike Run: ICP2-C_100824A 08/24/10 16:00 <br />Chromium 1.98 mg/L 0.050 97 70 130 <br />Iron 2.01 mg/L 0.030 98 70 130 <br />Manganese 2.03 mg/L 0.010 95 70 130 <br />Sample ID: C10080651-001BMSD 3 Sample Matrix Spike Duplicate Run: ICP2-C_100824A 08/24/10 16:04 <br />Chromium 1.99 mg/L 0.050 98 70 130 0.5 20 <br />Iron 2.01 mg/L 0.030 97 70 130 0.1 20 <br />Manganese 2.03 mg/L 0.010 95 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 10 of 21