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ENERGY <br />Trust our People. Trust our Data. <br />Billings, MT 800.735.4489 • Casper, WY 888.235.0515 <br />College Station, TX 888.690.2218 • Gillette, WY 866.686.7175 • Helena. MT 871.472.0711 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 10/30/15 <br />Project: Schwartz - SW 10/7/15 S28471 - S28472 Work Order: C15100364 <br />Analyte <br />Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.8 Analytical Run ICPMS2-C_151020B <br />Lab ID: ICV 6 Initial Calibration Verification Standard 10/20/15 17 23 <br />Antimony 0 0488 mg/L 0 0010 98 90 110 <br />Arsenic 0 0468 mg/L 0.0010 94 90 110 <br />Chromium 0 0480 mg/L 0 0010 96 90 110 <br />Copper 0 0466 mg/L 0.0010 93 90 110 <br />Silver 0 0193 mg/L 0 0010 97 90 110 <br />Thallium 0.0487 mg/L 0 0010 97 90 110 <br />Method: E200.8 <br />Lab ID: MB -45961 6 Method Blank <br />Antimony ND mg/L 0.0002 <br />Arsenic ND mg/L 0 0004 <br />Chromium 0 0004 mg/L 6E-05 <br />Copper ND mg/L 2E-05 <br />Silver ND mg/L 9E-05 <br />Thallium ND mg/L 7E-06 <br />Run. ICPMS2-C_151020B <br />Batch: 45961 <br />10/20/15 18:28 <br />Lab ID: LCS3-45961 6 Laboratory Control Sample Run ICPMS2-C_151020B 10/20/15 18 31 <br />Antimony 0 529 mg/L 0 0010 106 85 115 <br />Arsenic 0 471 mg/L 0.0010 94 85 115 <br />Chromium 0.518 mg/L 0 0050 104 85 115 <br />Copper 0 436 mg/L 0.0050 87 85 115 <br />Silver 0.0450 mg/L 0.0010 90 85 115 <br />Thallium 0 459 mg/L 0.00050 92 85 115 <br />Lab ID: C15100409-002AMS3 6 Sample Matrix Spike Run. ICPMS2-C_151020B 10/20/15 19 05 <br />Antimony 0.533 mg/L 0 0010 107 70 130 <br />Arsenic 0 462 mg/L 0 0010 92 70 130 <br />Chromium 0 429 mg/L 0.0050 85 70 130 <br />Copper 0 446 mg/L 0 0050 89 70 130 <br />Silver 0 0431 mg/L 0.0010 86 70 130 <br />Thallium 0 451 mg/L 0 00050 90 70 130 <br />Lab ID: 015100409-002AMSD 6 Sample Matrix Spike Duplicate Run: ICPMS2-C_151020B 10/20/15 19:08 <br />Antimony 0 535 mg/L 0 0010 107 70 130 0.4 20 <br />Arsenic 0.451 mg/L 0.0010 90 70 130 2 5 20 <br />Chromium 0.413 mg/L 0 0050 82 70 130 3.8 20 <br />Copper 0.416 mg/L 0.0050 83 70 130 6.8 20 <br />Silver 0 0428 mg/L 0 0010 86 70 130 0.5 20 <br />Thallium 0 448 mg/L 0 00050 90 70 130 0.6 20 <br />Method: E200.8 Analytical Run. ICPMS2-C_151028A <br />Lab ID: ICV 2 Initial Calibration Verification Standard 10/28/15 11.01 <br />Arsenic 0.0471 mg/L 0.0010 94 90 110 <br />Chromium 0.0468 mg/L 0 0010 94 90 110 <br />Qualifiers: <br />RL - Analyte reporting limit <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 7 of 18 <br />