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........... _ ... - <br />w w.energyiab.com f Helena MT B77-472-0711 • eiiiings MT 800-735-4489 4 Casper, WY 888-235-0515 <br />,. M analytical trceboceSince 1952 Gillette, WY 866-686-7175 • Rapid City, SO 888-672-1225 • CDUege Station, T% 888-680-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 01/21/11 <br />Project: Schwartzwalder Water Sampling Program-Ground Water Work Order: C10120819 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Clual <br />Method: E300.0 <br />Sample ID: LCS 2 Laboratory Control Sample Run: IC2-C_101230A <br />Chloride 10.0 mg/L 1.0 100 90 110 <br />Sulfate 40.6 mg/L 1.0 101 90 110 <br />Sample ID: MBLK 2 Method Blank Run: IC2-C_101230A <br />Chloride ND mg/L 0.06 <br />Sulfate 0.2 mg/L 0.2 <br />Sample ID: C10120815-003AMS 2 Sample Matrix Spike Run: IC2-C._101230A <br />Chloride 14.8 mg/L 1.0 103 80 120 <br />Sulfate 47.5 mg/L 1.0 99 80 120 <br />Sample ID: C1 01 20815-003AMSD 2 Sample Matrix Spike Duplicate Run: IC2-C_101230A <br />Chloride 15.0 mg/L 1.0 106 80 120 <br />Sulfate 48.6 mg/L 1.0 102 80 120 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum delectable concentration <br />Batch: R141412 <br />12/30/10 12:53 <br />12/30/10 13:08 <br />12/31/10 01:59 <br />12/31/10 02:15 <br />1.9 10 <br />2.3 10 <br />Page 16 of 25