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Trustour People. Trust our 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: <br />Cotter Corporation <br />Report Date: <br />05/07/15 <br />Project: <br />Schwartz - GW 4/14/15 <br />S27854, S27857 <br />Work Order: <br />C15040486 <br />Analyte <br />Count <br />Result Units <br />RL <br />%REC <br />Low Limit <br />High Limit RPD <br />RPDLimit Qual <br />Method: <br />E200.8 <br />Analytical Run: ICPMS2-C_150420B <br />Lab ID: <br />ICV <br />2 <br />Initial Calibration Verification Standard <br />04/20/15 19:49 <br />Lead <br />0.0479 mg/L <br />0.0010 <br />96 <br />90 <br />110 <br />Thallium <br />0.0487 mg/L <br />0.0010 <br />97 <br />90 <br />110 <br />Lab ID: <br />ICV <br />2 <br />Initial Calibration Verification Standard <br />04/20/15 22:51 <br />Lead <br />0.0492 mg/L <br />0.0010 <br />98 <br />90 <br />110 <br />Thallium <br />0.0493 mg/L <br />0.0010 <br />99 <br />90 <br />110 <br />Lab ID: <br />ICV <br />2 <br />Initial Calibration Verification Standard <br />04/21/15 02:17 <br />Lead <br />0.0480 mg/L <br />0.0010 <br />96 <br />90 <br />110 <br />Thallium <br />0.0487 mg/L <br />0.0010 <br />97 <br />90 <br />110 <br />Method: <br />E200.8 <br />Batch: 44432 <br />Lab ID: <br />MB -44432 <br />6 <br />Method Blank <br />Run: ICPMS2-C 150420B <br />04/20/15 21:00 <br />Antimony <br />ND mg/L <br />0.0002 <br />Arsenic <br />0.0003 mg/L <br />0.0003 <br />Copper <br />ND mg/L <br />0.0004 <br />Lead <br />5E-05 mg/L <br />3E-05 <br />Silver <br />0.0001 mg/L <br />2E-05 <br />Thallium <br />ND mg/L <br />0.0001 <br />Lab ID: <br />LCS3-44432 <br />6 <br />Laboratory Control Sample <br />Run: ICPMS2-C_150420B <br />04/20/15 21:03 <br />Antimony <br />0.478 mg/L <br />0.0010 <br />96 <br />85 <br />115 <br />Arsenic <br />0.474 mg/L <br />0.0010 <br />95 <br />85 <br />115 <br />Copper <br />0.471 mg/L <br />0.0050 <br />94 <br />85 <br />115 <br />Lead <br />0.479 mg/L <br />0.0010 <br />96 <br />85 <br />115 <br />Silver <br />0.0640 mg/L <br />0.0010 <br />128 <br />85 <br />115 <br />S <br />Thallium <br />0.479 mg/L <br />0.00050 <br />96 <br />85 <br />115 <br />Lab ID: <br />015040482-001CMS3 <br />6 <br />Sample Matrix Spike <br />Run: ICPMS2-C_150420B <br />04/20/15 21:27 <br />Antimony <br />0.49 mg/L <br />0.0010 <br />98 <br />70 <br />130 <br />Arsenic <br />0.49 mg/L <br />0.0010 <br />97 <br />70 <br />130 <br />Copper <br />0.59 mg/L <br />0.010 <br />94 <br />70 <br />130 <br />Lead <br />0.49 mg/L <br />0.0010 <br />99 <br />70 <br />130 <br />Silver <br />0.065 mg/L <br />0.010 <br />130 <br />70 <br />130 <br />Thallium <br />0.48 mg/L <br />0.00040 <br />96 <br />70 <br />130 <br />Lab ID: <br />C15040482-001CMSD <br />6 <br />Sample Matrix Spike Duplicate <br />Run: ICPMS2-C_150420B <br />04/20/15 21:30 <br />Antimony <br />0.49 mg/L <br />0.0010 <br />98 <br />70 <br />130 0.2 <br />20 <br />Arsenic <br />0.49 mg/L <br />0.0010 <br />98 <br />70 <br />130 0.6 <br />20 <br />Copper <br />0.60 mg/L <br />0.010 <br />96 <br />70 <br />130 1.4 <br />20 <br />Lead <br />0.49 mg/L <br />0.0010 <br />98 <br />70 <br />130 0.6 <br />20 <br />Silver <br />0.065 mg/L <br />0.010 <br />131 <br />70 <br />130 0.6 <br />20 S <br />Thallium <br />0.48 mg/L <br />0.00040 <br />97 <br />70 <br />130 0.3 <br />20 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration S - Spike recovery outside of advisory limits. <br />Page 13 of 30 <br />