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• www.ewdab.com Helena, MT 877- 472 -0711 • Billings, MT 800 - 735 -4409 • Casper, WY 888 - 235 -9515 <br />Aw"aE= dW= Siam 1931 Gillette, WY 866 -686 -7175 • Rapid City, SD 888 -672 -1225 • College Station, TX 888 -680 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartz -GW 09/04/14 S27679 <br />Analyte Count Result Units <br />Method: E200.8 <br />Report Date: 09/30/14 <br />Work Order: 014090400 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Analytical Run: ICPMS4- C_140917A <br />Lab ID: ICV 4 Initial Calibration Verification Standard 09/17/14 16:04 <br />Antimony <br />0.0497 <br />mg /L <br />0.0010 <br />99 <br />90 <br />110 <br />Arsenic <br />0.0510 <br />mg /L <br />0.0010 <br />102 <br />90 <br />110 <br />Lead <br />0.0499 <br />mg /L <br />0.0010 <br />100 <br />90 <br />110 <br />Thallium <br />0.0496 <br />mg /L <br />0.0010 <br />99 <br />90 <br />110 <br />Method: <br />E200.8 <br />Lab ID: <br />MB -42613 <br />4 <br />Method Blank <br />Antimony <br />09/18/14 08:04 <br />0.0002 <br />ND mg /L <br />Arsenic <br />ND mg /L <br />Lead <br />ND mg /L <br />Thallium <br />ND mg /L <br />Lab ID: <br />LCS3 -42613 <br />4 <br />Laboratory Control Sample <br />Antimony <br />0.547 mg /L <br />Arsenic <br />09/18/14 08:08 <br />0.503 mg /L <br />Lead <br />85 115 <br />0.527 mg /L <br />Thallium <br />101 <br />85 115 <br />0.433 mg /L <br />Lab ID: <br />014090427- 005AMS3 <br />4 <br />Sample Matrix Spike <br />Antimony <br />0.00050 <br />0.581 mg /L <br />Arsenic <br />0.574 mg /L <br />Lead <br />Run: ICPMS4 -C 140917A <br />0.609 mg /L <br />Thallium <br />116 <br />70 130 <br />0.513 mg /L <br />Lab ID: <br />C14090427- 005AMSD <br />4 <br />Sample Matrix Spike Duplicate <br />Antimony <br />0.0010 <br />0.576 mg /L <br />Arsenic <br />0.539 mg /L <br />Lead <br />70 130 <br />0.567 mg /L <br />Thallium <br />Run: ICPMS4 -C 140917A <br />0.481 mg /L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 11 of 21 <br />Batch: 42613 <br />Run: ICPMS4 -C 140917A <br />09/18/14 08:04 <br />0.0002 <br />0.0004 <br />4E -05 <br />6E -05 <br />Run: ICPMS4 -C 140917A <br />09/18/14 08:08 <br />0.0010 <br />109 <br />85 115 <br />0.0010 <br />101 <br />85 115 <br />0.0010 <br />105 <br />85 115 <br />0.00050 <br />87 <br />85 115 <br />Run: ICPMS4 -C 140917A <br />09/18/14 09:23 <br />0.0010 <br />116 <br />70 130 <br />0.0010 <br />115 <br />70 130 <br />0.0010 <br />122 <br />70 130 <br />0.00050 <br />103 <br />70 130 <br />Run: ICPMS4 -C 140917A <br />09/18/14 09:26 <br />0.0010 <br />115 <br />70 130 <br />0.9 <br />20 <br />0.0010 <br />107 <br />70 130 <br />6.4 <br />20 <br />0.0010 <br />113 <br />70 130 <br />7.2 <br />20 <br />0.00050 <br />96 <br />70 130 <br />6.6 <br />20 <br />ND - Not detected at the reporting limit. <br />Page 11 of 21 <br />