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ENERGY <br />_A-OPAIOPIL.S <br />Client: Cotter Corporation <br />Qualifiers: <br />ti www.energylab.com <br />AaeryttalErcalana Slaw 7852 <br />Helena, MT 877472 -0711 • Billings, MT 800- 735 -4489 • Casper, WY 888- 235 -0515 <br />Gillette, WY 866 -686 -7175 • Rapid City, SD 888 -672 -1225 • College Station, TX 868 -690 -2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Report Date: 06/20/11 <br />Project: Schwartz SW 5/10/11 S25777- S25784 Work Order: C11050423 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: R145900A <br />05/17/11 13:47 <br />Method: E200.8 <br />Sample ID: C11050331- 002CMS4 14 Sample Matrix Spike Run: ICPMS4- C_110516A <br />Zinc 0.0814 mg /L 0.010 109 70 130 <br />Sample ID: C11050331- 002CMSD 14 Sample Matrix Spike Duplicate Run: ICPMS4- C_110516A 05/17/11 14:28 <br />Aluminum 1.16 mg /L 0.10 70 130 0.4 20 A <br />Antimony 0.0574 mg /L 0.050 115 70 130 7.6 20 <br />Arsenic 0.0585 mg /L 0.0010 114 70 130 2.7 20 <br />Boron 0.0790 mg /L 0.0027 100 70 130 1.5 20 <br />Chromium 0.0524 mg /L 0.050 105 70 130 1.9 20 <br />Copper 0.0748 mg /L 0.010 101 70 130 0.3 20 <br />Iron 2.25 mg /L 0.030 99 70 130 1.5 20 <br />Lead 0.0595 mg /L 0.050 102 70 130 2.1 20 <br />Manganese 0.578 mg /L 0.010 70 130 16 20 A <br />Molybdenum 0.0529 mg /L 0.0010 104 70 130 1.6 20 <br />Silver 0.0196 mg /L 0.010 98 70 130 3.2 20 <br />Thallium 0.0509 mg /L 0.0010 102 70 130 1.6 20 <br />Uranium 0.0510 mg /L 0.00030 99 70 130 2.6 20 <br />Zinc 0.0831 mg /L 0.010 112 70 130 2.1 20 <br />RL - Analyte reporting limit. A - The analyte level was greater than four times the spike level. In <br />accordance with the method % recovery is not calculated. <br />ND - Not detected at the reporting limit. MDC - Minimum detectable concentration <br />Page 25 of 44 <br />