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www.energylab.com Helena, MT 877-472-0711 * Billings, MT 800.735-4489 * Casper, WY 888-235-0515 <br />n Anr/yNmlfxcat/eace&we 199 ? Gillette, WY 866-686-1175 * Rapid City, SD 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 />Analyte Count Result Units <br />Method: E300.0 <br />Sample ID: LCS 2 Laboratory Control Sample <br />Chloride 9.44 mg/L <br />Sulfate 37.8 mg/L <br />Sample ID: MBLK 2 Method Blank <br />Chloride ND mg/L <br />Sulfate ND mg/L <br />Sample ID: C10080823-004AMS 2 Sample Matrix Spike <br />Chloride 14.3 mg/L <br />Sulfate 48.1 mg/L <br />Sample ID: C10080823-004AMSD 2 Sample Matrix Spike Duplicate <br />Chloride 14.4 mg/L <br />Sulfate 48.5 mg/L <br />Report Date: 09/09/10 <br />Work Order: C10080639 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: R136577 <br />Run: IC2-C_100826A 08/26/10 23:08 <br />1.0 94 90 110 <br />1.0 94 90 110 <br />Run: IC2-C_100826A <br />0.2 <br />0.04 <br /> Run: IC2-C_100826A <br />1.0 105 80 120 <br />1.0 102 80 120 <br /> Run: IC2-C_100826A <br />1.0 107 80 120 <br />1.0 103 80 120 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />08/26/10 23:22 <br />08/27/10 10:26 <br />08/27/10 10:40 <br />1 20 <br />0.8 20 <br />Page 14 of 21