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• Trust our Peo le.TrustourData. <br />p � Billings, MT 800.735.4489 Casper, NY 886.235.0515 <br />College Station, TX 888.690.2218 • Gillette, WY 866.686.7175 • Helena, MT 877.472.0711 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 04/16/15 <br />Project: Schwartz -GW 3/27/15 S28168,S28169 Work Order: C15030895 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qua[ <br />Method: E200.8 Analytical Run: ICPMS2-C_150402A <br />Lab ID: ICV 3 Initial Calibration Verification Standard 04/02/15 12:35 <br />Antimony <br />0.0496 <br />mg/L <br />0.0010 <br />99 <br />90 <br />110 <br />Copper <br />0.0496 <br />mg/L <br />0.0010 <br />99 <br />90 <br />110 <br />Thallium <br />0.0502 <br />mg/L <br />0.0010 <br />100 <br />90 <br />110 <br />Method: <br />E200.8 <br />Batch: R197840 <br />Run: ICPMS2-C_150402A <br />Lab ID: <br />LFB <br />3 <br />Laboratory Fortified Blank <br />100 <br />Antimony <br />102 <br />0.0517 mg/L <br />0.0010 <br />Copper <br />Run: ICPMS2-C_150402A <br />04/02/15 21:22 <br />0.0498 mg/L <br />0.0010 <br />Thallium <br />89 <br />70 130 <br />0.0512 mg/L <br />0.0010 <br />Lab ID: <br />C15040047-005AMS4 <br />3 <br />Sample Matrix Spike <br />04/02/15 21:35 <br />Antimony <br />70 130 2.0 <br />20 <br />0.0627 mg/L <br />0.0010 <br />Copper <br />96 <br />70 130 2.7 <br />0.0475 mg/L <br />0.0050 <br />Thallium <br />04/02/1513:51 <br />0.0468 mg/L <br />0.00050 <br />Lab ID: <br />015040047-005AMSD <br />3 <br />Sample Matrix Spike Duplicate <br />Antimony <br />0.0640 mg/L <br />0.0010 <br />Copper <br />0.0489 mg/L <br />0.0050 <br />Thallium <br />0.0480 mg/L <br />0.00050 <br />Lab ID: <br />LRB <br />3 <br />Method Blank <br />Antimony <br />ND mg/L <br />6E-05 <br />Copper <br />ND mg/L <br />0.0001 <br />Thallium <br />ND mg/L <br />9E-06 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 6 of 17 <br />Batch: R197840 <br />Run: ICPMS2-C_150402A <br />04/02/15 13:54 <br />103 <br />85 115 <br />100 <br />85 115 <br />102 <br />85 115 <br />Run: ICPMS2-C_150402A <br />04/02/15 21:22 <br />112 <br />70 130 <br />89 <br />70 130 <br />93 <br />70 130 <br />Run: ICPMS2-C_150402A <br />04/02/15 21:35 <br />115 <br />70 130 2.0 <br />20 <br />92 <br />70 130 3.0 <br />20 <br />96 <br />70 130 2.7 <br />20 <br />Run: ICPMS2-C 150402A <br />04/02/1513:51 <br />ND - Not detected at the reporting limit. <br />Page 6 of 17 <br />