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ww <br />ED w.energylati.cont Helena, MT 877-472-0711 * Billings, Mt 800-73$-4489 - Casper, WY 888-235-0515 <br />a, ' my • Anslyrrcal £xwlleaca Shea 195? <br />Gillette, YN 666-688.7175 - Rapid City, SO 888-672-1225 r College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 01/05/11 <br />Project: Schwartzwalder Mine Monitoring Program-Surface Wat Work Order: C10110690 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimil Qual <br />Method: E300.0 Batch: R140210 <br />Sample ID: LCS 2 Laboratory Control Sample Run: IC2-C_101122A 11/22/10 11:38 <br />Chloride 9.33 mg/L 1.0 93 90 110 <br />Sulfate 37.6 mg/L 1.0 94 90 110 <br />Sample ID: MBLK 2 Method Blank Run: IC2-C_101122A 11122110 11:53 <br />Chloride ND mg/L 0.06 <br />Sulfate ND mg/L 0.2 <br />Sample ID: 010110723-002AMS 2 Sample Matrix Spike Run: IC2-C_101122A 11/23110 00:28 <br />Chloride 122 mg/L 1.0 103 80 120 <br />Sulfate 444 mg/L 4.0 104 80 120 <br />Sample ID: C10110723-002AMSD 2 Sample Matrix Spike Duplicate Run: IC2-C.- 101 122A 11/23/10 00:43 <br />Chloride 122 mg/L 1.0 104 80 120 0.5 10 <br />Sulfate 446 mg/L 4.0 105 80 120 0.6 10 <br />Qualifiers: <br />RL - Analyle reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 23 of 39 <br />i