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• WWWA a dabam Helena, MT 877-472-0711 • Billings, MT 800-735-4488 • Casper, WY 888-235-0515 <br />AearytlplF w IM Gillette, WY 866-686-7175 • Rapid City, S6 886-672-1225 • College Station, TX 868-680-2218 <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 Quai <br />Method: A2540 C Batch: 110329_1_SLDS-TDS-W <br />Sample ID: MBLK1_110329 Method Blank Run: BAL-1 _110329B 03/29/11 15:31 <br />Solids, Total Dissolved TDS @ 180 C ND mg/L 10 <br />Sample ID: LCS1_110329 Laboratory Control Sample Run: BAL-1 _110329B 03/29/11 15:31 <br />Solids, Total Dissolved TDS @ 180 C 997 mg/L 10 100 90 110 <br />Sample ID: C1 1030828-001 BDUP Sample Duplicate Run: BAL-1 _110329B 03/29/11 15:34 <br />Solids, Total Dissolved TDS @ 180 C 204 mg/L 10 0.4 10 <br />Sample ID: 011030834-003BMS Sample Matrix Spike Run: BAL-1 _110329B 03/29/11 15:35 <br />Solids, Total Dissolved TDS @ 180 C 2230 mg/L 10 100 90 110 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 8 of 26