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www.eneidab.com ( Helena, MT 877-472-0711 * Billings, AilT 800-735-4489 • Casper, WY 888-235-0515 <br />AnaWa!£rceAanrQ Since 1952 Gillette, WY 866-686-7175 • Rapid City, SO 888-572-1225 v College Station, TX 888-680-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 12/09/10 <br />Project: Schwartzwalder Water Sampling Program-Ground Water Work Order: C10110027 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDL[mit Qua[ <br />Method: E300.0 Batch: R139588 <br />Sample ID: LCS 2 Laboratory Control Sample Run: I02-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 0.06 <br />Sulfate ND mg/L 0.2 <br />Sample ID: C1 01 10027-002BMS 2 Sample Matrix Spike Run: IC2-C_101103A 11/06/10 20:25 <br />Chloride 50.3 mg/L 1.0 109 80 120 <br />Sulfate 211 mg/L 1.6 107 80 120 <br />Sample ID: 010110027-002BMSD 2 Sample Matrix Spike Duplicate Run: IC2-C_101103A 11/06/10 20:42 <br />Chloride 50.5 mg/L 1.0 110 80 120 0.5 10 <br />Sulfate 211 mg/L 1.6 107 80 120 0.2 10 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 16 of 26