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.......__ <br />www.energilab.tam f Helena, IdT 877-472-0711 Billings, MT 800-735-4489 - Casper, WY 808-235-0515 <br />n MaryrralfrcegBncvSfnca l9i2 Gillette, MY $66-686-7175 • Rapid City, SD $88-672-1225 • College Station, TX 888-690.2218 <br />OA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program - SW <br />Analyte Count Result Units <br />Method: E300.0 <br />Sample ID: LCS 2 Laboratory Control Sample <br />Chloride 9.23 mg/L <br />Sulfate 37.3 mg/L <br />Sample to: MBLK 2 Method Blank <br />Chloride ND mg/L <br />Sulfate ND mg/L <br />Sample ID: 010110470-002AMS 2 Sample Matrix Spike <br />Chloride 27.0 mg/L <br />Sulfate 218 mg/L <br />Sample ID: C10110470-002AMSD 2 Sample Matrix Spike Duplicate <br />Chloride 27.1 mg/L <br />Sulfate 216 mg/L <br />Report Date: 12/23/10 <br />Work Order: C10110479 <br />RL % REC Low Limit High Limit RPD RPDLimit Qual <br />Balch: R139886 <br />Run: IC2-C_101112A 11/12/10 20:53 <br />1.0 92 90 110 <br />1.0 93 90 110 <br />Run: IC2-C_101112A 11/12/10 21:09 <br />0.06 <br />0.2 <br />Run: IC2-C_.101112A <br />1.0 101 80 120 <br />1.6 100 80 120 <br />Run: IC2-C_101112A <br />1.0 101 80 120 <br />1.6 97 80 120 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />0.3 <br />0.9 <br />11/13/10 23:52 <br />11/14/10 00:08 <br />10 <br />10 <br />Page 24 of 40