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ENERGY <br />LABORATORIES <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />www.energylab.com <br />Analytical Excellence S/nce 1032 J <br />Client: Cotter Corporation <br />Project: Schwartz GW 8/31/2012 S26629 <br />Analyte Count Result Units <br />Helena, MT 877 - 472 - 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 888 - 690 - 2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Method: E200.8 <br />Sample ID: MB -34925 2 Method Blank <br />Arsenic 0.0008 mg /L 0.0002 <br />Silver 0.0004 mg /L 4E -05 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.8 Analytical Run: ICPMS2- C_120921A <br />Sample ID: ICV 2 Initial Calibration Verification Standard 09/21/12 14:39 <br />Arsenic 0.0499 mg /L 0.0010 100 90 110 <br />Silver 0.0219 mg /L 0.0010 110 90 110 <br />Run: ICPMS2-C_120921A <br />Sample ID: LCS3 - 34925 2 Laboratory Control Sample Run: ICPMS2- C_120921A <br />Arsenic 0.504 mg /L 0.0010 101 85 115 <br />Silver 0.0525 mg /L 0.0010 104 85 115 <br />Sample ID: C12090028 -001BMS3 2 Sample Matrix Spike Run: ICPMS2- C_120921A <br />Arsenic 0.509 mg /L 0.0011 101 70 130 <br />Silver 0.0512 mg /L 0.0010 102 70 130 <br />Revised Date: 11/01/12 <br />Report Date: 10/05/12 <br />Work Order: C12090026 <br />Batch: 34925 <br />09/21/12 16:55 <br />09/21/12 16:57 <br />09/21/12 17:07 <br />Sample ID: C12090028 -001BMSD 2 Sample Matrix Spike Duplicate Run: ICPMS2- C_120921A 09/21/12 17 10 <br />Arsenic 0.515 mg /L 0.0011 103 70 130 1.2 20 <br />Silver 0.0523 mg /L 0.0010 105 70 130 2.2 20 <br />ND - Not detected at the reporting limit. <br />Page 9 of 20 <br />