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¦ www.energylab.min Helena, MT 871-414-0711 • Billings, W 688-135-4189 • Casper, WY 888-235-1515 <br />AaarytlcalEsabawnw au Gillette, WY 866-686-7115 • Rapid City, SD 888-672-1225 • College Station, TX 688-688-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 11 /17/10 <br />Project: Schwartzwalder Water Monitoring Program (S25247) Work Order: C10101008 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qua[ <br />Method: E300.0 Batch: R139588 <br />Sample ID: LCS 2 Laboratory Control Sample Run: IC2-C_101103A 11/03/10 18:41 <br />Chloride 9.42 mg/L 1.0 94 90 110 <br />Sulfate 37.8 mg/L 1.0 95 90 110 <br />Sample ID: MBLK 2 Method Blank Run: IC2-C_101103A 11/03/10 18:57 <br />Chloride ND mg/L 3.0 <br />Sulfate ND mg/L 5.0 <br />Sample ID: C10101008-001 BMS 2 Sample Matrix Spike Run: IC2-C_101103A 11/06/10 00:10 <br />Chloride 52.5 mg/L 1.0 104 80 120 <br />Sulfate 337 mg/L 1.6 92 80 120 <br />Sample ID: C10101008-001 BMSD 2 Sample Matrix Spike Duplicate Run: IC2-C_101103A 11 /06/10 00:27 <br />Chloride 52.9 mg/L 1.0 106 80 120 0.7 10 <br />Sulfate 340 mg/L 1.6 95 80 120 0.7 10 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 15 of 23