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www.energylab.eom Helena, MT 677-472-0711 • Billings, 6R 000-735-4489 • Gasper, WY 868-235-0515 <br />1858 J Gillette, WY 866-686-7175 • Rapid City, SO 886-672-1225 • College Station, TX 888-690-2216 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 04/19/11 <br />Project: Schwartz GW 3/24/11 S25646 & S25647 Work Order: C11030817 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E300.0 Batch: R144276 <br />Sample ID: LCS 2 Laboratory Control Sample Run: IC2-C_110330A 03/30/11 12:09 <br />Chloride 9.95 mg/L 1.0 100 90 110 <br />Sulfate 40.2 mg/L 1.0 100 90 110 <br />Sample ID: MBLK 2 Method Blank Run: IC2-C_110330A 03/30/11 12:25 <br />Chloride ND mg/L 3.0 <br />Sulfate ND mg/L 5.0 <br />Sample ID: LFB 2 Laboratory Fortified Blank Run: IC2-C_110330A 03/30/11 12:56 <br />Chloride 12.4 mg/L 1.0 99 90 110 <br />Sulfate 50.6 mg/L 1.0 101 90 110 <br />Sample ID: C11030827-002CMS 2 Sample Matrix Spike Run: IC2-C_110330A 03/30/11 21:25 <br />Chloride 61.1 mg/L 1.0 103 80 120 <br />Sulfate 1140 mg/L 4.0 80 120 A <br />Sample ID: C11030827-002CMSD 2 Sample Matrix Spike Duplicate Run: IC2-C_110330A 03/30/11 21:40 <br />Chloride 60.8 mg/L 1.0 103 80 120 0.4 10 <br />Sulfate 1130 mg/L 4.0 80 120 0.9 10 A <br />Clualifiers: <br />RL - Analyte reporting limit. <br />ND - Not detected at the reporting limit. <br />A - The analyte level was greater than four times the spike level. In <br />accordance with the method % recovery is not calculated. <br />MDC - Minimum detectable concentration <br />Page 17 of 26