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el ' www.energylab.com itr Helena, MT 877-472-0711 - Billings, W 800-735-4489 - Casper, WY 888-235-0515 <br />- t ? Ansty MEXcerlaereSince 1951 ! Gillette, WY 868-686-T175 • Rapid City, SD BOB-672-1225 • College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Mine <br />Analyte Count Result Units <br />Method: E300.0 <br />Sample ID: LCS 2 Laboratory Control Sample <br />Chloride 9.67 mg/L <br />Sulfate 38.7 mg/L <br />Sample ID: MBLK 2 Method Blank <br />Chloride ND mg/L <br />Sulfate ND mg/L <br />Sample ID: C10080889-005AMS 2 Sample Matrix Spike <br />Chloride 84.7 mg/L <br />Sulfate 177 mg/L <br />Sample ID: C10080889-005AMSD 2 Sample Matrix Spike Duplicate <br />Chloride 85.5 mg/L <br />Sulfate 179 mg/L <br />Sample ID: C10080978-001AMS 2 Sample Matrix Spike <br />Chloride 25.2 mg/L <br />Sulfate 174 mg/L <br />Sample ID: C1 0080978-001 AMSD 2 Sample Matrix Spike Duplicate <br />Chloride 25.8 mg/L <br />Sulfate 174 mg/L <br />Report Date: 09/27/10 <br />Work Order: C10080962 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: R136884 <br />Run: IC2-C100902A 09/02/10 20:51 <br />1.0 97 90 110 <br />1.0 97 90 110 <br />Run: IC2-C 100902A 09/02/10 21:05 <br />0.2 <br />0.04 <br /> Run: IC2-C_100902A 09/03/10 19:26 <br />1.0 96 80 120 <br />1.6 106 80 120 <br /> Run: IC2-C100902A 09/03/10 19:41 <br />1.0 101 80 120 1 20 <br />1.6 109 80 120 1 20 <br /> Run: IC2-C100902A 09/03/10 23:17 <br />1.0 104 80 120 <br />1.6 105 80 120 <br /> Run: IC2-C100902A 09/03/10 23:32 <br />1.0 107 80 120 2 20 <br />1.6 105 80 120 0 20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 28 of 44