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wnrrffWgylabeam e n Mt 617=472-0711 - Billings, MT 600.735- 489 - Gaapm, WY M-235-0515 <br />AWeatE=ft" AN tAf1 66?T1 75 • Rap d City, SD 618-672-1225 - College Station, IX 680-690-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartz GW 02/25/11 S25622 <br />Analyte Count Result Units <br />Method: E300.0 <br />Sample ID: LCS 2 Laboratory Control Sample <br />Chloride 10.1 mg/L <br />Sulfate 40.9 mg/L <br />Sample ID: MBLK 2 Method Blank <br />Chloride ND mg/L <br />Sulfate 0.2 mg/L <br />Sample ID: LFB 2 Laboratory Fortified Blank <br />Chloride 12.3 mg/L <br />Sulfate 49.8 mg/L <br />Sample ID: C1 1020757-001 AMS 2 Sample Matrix Spike <br />Chloride 74.8 mg/L <br />Sulfate 1050 mg/L <br />Sample ID: C11020757-001AMSD 2 Sample Matrix Spike Duplicate <br />Chloride 75.9 mg/L <br />Sulfate 1050 mg/L <br />Report Date: 03/28/11 <br />Work Order: C11020751 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: R143337 <br />Run: IC2-C_110303A 03/03/11 13:10 <br />1.0 101 90 110 <br />1.0 102 90 110 <br />Run: IC2-C 110303A 03/03/11 13:26 <br />0.06 <br />0.2 <br /> Run: IC2-C_110303A 03/03/11 13:57 <br />1.0 98 90 110 <br />1.0 99 90 110 <br /> Run: IC2-C_110303A 03/04/11 09:59 <br />1.0 100 80 120 <br />4.0 80 120 A <br /> Run: IC2-C_110303A 03/04/11 10:15 <br />1.0 102 80 120 1.5 10 <br />4.0 80 120 0.4 10 A <br />Qualifiers: <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 12 of 20 <br />