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Trust our People. Trustour Data. Billings. MT 800.735.4489 • Casper, WY 888.235.0515 <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: 03/31/15 <br />Project: Schwartz -GW 3/18/15 S27837,S27838 Work Order: C15030640 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qua[ <br />Method: E200.8 Analytical Run: SUB -6240412 <br />Lab ID: QCS 3 Initial Calibration Verification Standard 03/26/15 19:40 <br />Antimony <br />0.0517 <br />mg/L <br />0.050 <br />103 <br />90 <br />110 <br />Copper <br />0.0487 <br />mg/L <br />0.010 <br />97 <br />90 <br />110 <br />Thallium <br />0.0503 <br />mg/L <br />0.10 <br />101 <br />90 <br />110 <br />Method: <br />E200.8 <br />03/26/15 13:37 <br />98 <br />85 115 <br />Lab ID: <br />LRB <br />3 <br />Method Blank <br />100 <br />Antimony <br />0.0002 mg/L <br />1 E-05 <br />Copper <br />70 130 <br />ND mg/L <br />4E-05 <br />Thallium <br />101 <br />70 130 <br />ND mg/L <br />1 E-05 <br />Lab ID: <br />LFB <br />3 <br />Laboratory Fortified Blank <br />11 20 <br />Antimony <br />70 130 <br />12 20 <br />0.0491 mg/L <br />0.050 <br />Copper <br />0.0470 mg/L <br />0.010 <br />Thallium <br />0.0499 mg/L <br />0.10 <br />Lab ID: <br />B15031806-005BMS <br />3 <br />Sample Matrix Spike <br />Antimony <br />0.104 mg/L <br />0.0010 <br />Copper <br />0.0923 mg/L <br />0.0050 <br />Thallium <br />0.101 mg/L <br />0.00050 <br />Lab ID: <br />B15031806-005BMSD <br />3 <br />Sample Matrix Spike Duplicate <br />Antimony <br />0.0925 mg/L <br />0.0010 <br />Copper <br />0.0820 mg/L <br />0.0050 <br />Thallium <br />0.0900 mg/L <br />0.00050 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Batch: B R240412 <br />Run: SUB -13240412 03/26/15 13:31 <br />ND - Not detected at the reporting limit. <br />Page 7 of 16 <br />Run: SUB -6240412 <br />03/26/15 13:37 <br />98 <br />85 115 <br />94 <br />85 115 <br />100 <br />85 115 <br />Run: SUB -6240412 <br />03/26/15 23:06 <br />104 <br />70 130 <br />92 <br />70 130 <br />101 <br />70 130 <br />Run: SUB -6240412 <br />03/26/15 23:11 <br />93 <br />70 130 <br />11 20 <br />81 <br />70 130 <br />12 20 <br />90 <br />70 130 <br />12 20 <br />ND - Not detected at the reporting limit. <br />Page 7 of 16 <br />