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www.emdab.com ( Helena, MT 877- 472 -0711 • Billings, MT 000- 7354489 • Casper, WY 888- 235 -0515 <br />AU"k*&CNft= Sk° ts32 J Gillette, WY 866 -666 -7175 • Rapid City, SO 888- 672 -1225 • College Station, TX 888 -690 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 09/24/14 <br />Project: Schwartz -GW 9/4/14 S27662 Work Order: 014090228 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.8 Analytical Run: ICPMS2- C_140923A <br />Lab ID: ICV Initial Calibration Verification Standard 09/23/14 13:47 <br />Arsenic 0.0508 mg /L 0.0010 101 90 110 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Batch: R191474 <br />09/23/14 14:36 <br />09/23/14 14:39 <br />09/24/14 06:12 <br />09/24/14 06:15 <br />20 <br />Page 7 of 14 <br />Method: <br />E200.8 <br />Lab ID: <br />LRB <br />Method Blank <br />Run: ICPMS2 -C 140923A <br />Arsenic <br />ND mg /L <br />0.00010 <br />Lab ID: <br />LFB - filtered <br />Laboratory Fortified Blank <br />Run: ICPMS2- C_140923A <br />Arsenic <br />0.0527 mg /L <br />0.0010 <br />105 85 115 <br />Lab ID: <br />014090144- 001CMS3 <br />Sample Matrix Spike <br />Run: ICPMS2- C_140923A <br />Arsenic <br />0.0517 mg /L <br />0.0010 <br />103 70 130 <br />Lab ID: <br />C14090144- 001CMSD <br />Sample Matrix Spike Duplicate <br />Run: ICPMS2- C_140923A <br />Arsenic <br />0.0527 mg /L <br />0.0010 <br />105 70 130 1.9 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Batch: R191474 <br />09/23/14 14:36 <br />09/23/14 14:39 <br />09/24/14 06:12 <br />09/24/14 06:15 <br />20 <br />Page 7 of 14 <br />