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• www.ene 681).can Helena, MT 671472-0711 • Billings, MT 600-7354469 • Casper, WY 868-235-6515 <br />AuIyWftvftm Am Gillette, WY 866-686-7175 • Rapid City, SD 866-672-1225 • College Station, TX 866-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 11/05/10 <br />Project: Schwartzwalder Water Monitoring Program Discharge Work Order: 010100100 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E300.0 Batch: R138664 <br />Sample ID: LCS 2 Laboratory Control Sample Run: IC2-C_101013A 10/13/10 22:22 <br />Chloride 9.45 mg/L 1.0 95 90 110 <br />Sulfate 37.7 mg/L 1.0 94 90 110 <br />Sample ID: MBLK 2 Method Blank Run: IC2-C_101013A 10/13/10 22:39 <br />Chloride ND mg/L 0.06 <br />Sulfate ND mg/L 0.2 <br />Sample ID: C10100103-002AMS 2 Sample Matrix Spike <br />Chloride 14.8 mg/L <br />Sulfate 98.6 mg/L <br />Sample ID: C1 01001 03-002AMSD 2 Sample Matrix Spike Duplicate <br />Chloride 15.0 mg/L <br />Sulfate 99.2 mg/L <br /> Run: IC2-C_101013A 10/15/10 00:06 <br />1.0 103 80 120 <br />1.0 103 80 120 <br /> Run: IC2-C_101013A 10/15/10 00:22 <br />1.0 104 80 120 1.3 20 <br />1.0 104 80 120 0.6 20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 15 of 22