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Trust our 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 877.411.0711 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 05/26/15 <br />Project: Schwartz - GW 5/1/15 S27887 Work Order: C15050075 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.8 Analytical Run: ICPMS4-C_150511A <br />Lab ID: ICV Initial Calibration Verification Standard 05/11/15 18:34 <br />Arsenic 0.0512 mg/L 0.0010 102 90 110 <br />Method: <br />E200.8 <br />Lab ID: MB -44740 <br />Method Blank <br />Batch: R199230 <br />Lab ID: <br />LRB <br />Method Blank <br />0.0002 <br />Run: ICPMS4-C_150511A <br />05/11/15 19:34 <br />Arsenic <br />Run: ICPMS4-C_150522A <br />ND mg/L <br />5E-05 <br />0.0010 <br />103 85 115 <br />Lab ID: C15050537-005CMS3 <br />Lab ID: <br />LFB <br />Laboratory Fortified Blank <br />Molybdenum <br />0.510 mg/L <br />Run: ICPMS4-C_150511A <br />05/11/15 19:39 <br />Arsenic <br />Sample Matrix Spike Duplicate <br />0.0569 mg/L <br />0.0010 <br />114 <br />85 115 <br />0.0010 <br />Lab ID: <br />C15050245-001DMS4 <br />Sample Matrix Spike <br />Run: ICPMS4-C_150511A <br />05/11/15 22:58 <br />Arsenic <br />0.0537 mg/L <br />0.0010 <br />106 <br />70 130 <br />Lab ID: <br />C15050245-00lDMSD <br />Sample Matrix Spike Duplicate <br />Run: ICPMS4-C_150511A <br />05/11/15 23:03 <br />Arsenic <br />0.0551 mg/L <br />0.0010 <br />108 <br />70 130 2.5 <br />20 <br />Method: <br />E200.8 <br />Analytical Run: ICPMS4-C_150522A <br />Lab ID: <br />ICV <br />Initial Calibration Verification Standard <br />05/22/15 15:05 <br />Molybdenum <br />0.0480 mg/L <br />0.0010 <br />96 <br />90 110 <br />Method: E200.8 <br />Lab ID: MB -44740 <br />Method Blank <br />Run: ICPMS4-C_150522A <br />Molybdenum <br />ND mg/L <br />0.0002 <br />Lab ID: LCS3-44740 <br />Laboratory Control Sample <br />Run: ICPMS4-C_150522A <br />Molybdenum <br />0.513 mg/L <br />0.0010 <br />103 85 115 <br />Lab ID: C15050537-005CMS3 <br />Sample Matrix Spike <br />Run: ICPMS4-C_150522A <br />Molybdenum <br />0.510 mg/L <br />0.0010 <br />102 70 130 <br />Lab ID: C15050537-005CMSD <br />Sample Matrix Spike Duplicate <br />Run: ICPMS4-C_150522A <br />Molybdenum <br />0.510 mg/L <br />0.0010 <br />102 70 130 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Batch: 44740 <br />05/22/15 16:51 <br />05/22/15 17:12 <br />05/22/15 17:44 <br />05/22/15 17:48 <br />0.1 20 <br />Page 7 of 13 <br />