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• ,. www.enerdab.com Helena, MT 877 - 472 -0711 a Billings, MT 800- 735 -4480 a Casper, WY 888 - 235 -0515 <br />Gillette, WY 866- 686 -7175 a Rapid City, SD 888 -672 -1225 a College Station, Tx 888 -690 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 09/30/14 <br />Project: Schwartz -GW 9/16/14 S27663 Work Order: C14090659 <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 />Method: <br />E200.8 <br />ND mg /L <br />5E -05 <br />Sample Matrix Spike <br />Run: ICPMS4- C_140929A <br />Batch: 42677 <br />Lab ID: <br />MB -42677 <br />Method Blank <br />0.0603 mg /L <br />0.0010 <br />Run: ICPMS2 -C 140923A <br />09/23/14 17:29 <br />Arsenic <br />0.0010 <br />ND mg /L <br />0.0003 <br />0.0596 mg /L <br />0.0010 <br />Sample Matrix Spike Duplicate <br />Lab ID: <br />LCS3 -42677 <br />Laboratory Control Sample <br />Run: ICPMS2- C_140923A <br />09/23/14 17:32 <br />Arsenic <br />0.493 mg /L <br />0.0010 <br />99 <br />85 115 <br />Lab ID: <br />C14090691- 001AMS3 <br />Sample Matrix Spike <br />Run: ICPMS2- C_140923A <br />09/23/14 17:49 <br />Arsenic <br />0.494 mg /L <br />0.0010 <br />99 <br />70 130 <br />Lab ID: <br />C14090691- 001AMSD <br />Sample Matrix Spike Duplicate <br />Run: ICPMS2- C_140923A <br />09/23/14 17:52 <br />Arsenic <br />0.486 mg /L <br />0.0010 <br />97 <br />70 130 1.6 <br />20 <br />Method: <br />E200.8 <br />Analytical Run: ICPMS4- C_140929A <br />Lab ID: <br />ICV <br />Initial Calibration Verification Standard <br />09/29/14 12:44 <br />Arsenic <br />0.0521 mg /L <br />0.0010 <br />104 <br />90 110 <br />Method: E200.8 <br />Lab ID: LRB <br />Arsenic <br />Lab ID: C14090792- 003BMS <br />Arsenic <br />Lab ID: C14090792- 003BMSD <br />Arsenic <br />Lab ID: LFB <br />Arsenic <br />Lab ID: C14090624- 013AMS4 <br />Arsenic <br />Lab ID: C14090624- 013AMSD <br />Arsenic <br />Method Blank <br />Run: ICPMS4- C_140929A <br />ND mg /L <br />5E -05 <br />Sample Matrix Spike <br />Run: ICPMS4- C_140929A <br />0.0597 mg /L <br />0.0010 <br />Sample Matrix Spike Duplicate <br />Run: ICPMS4- C_140929A <br />0.0603 mg /L <br />0.0010 <br />Laboratory Fortified Blank <br />Run: ICPMS4- C_140929A <br />0.0526 mg /L <br />0.0010 <br />Sample Matrix Spike <br />Run: ICPMS4- C_140929A <br />0.0596 mg /L <br />0.0010 <br />Sample Matrix Spike Duplicate <br />0.0611 mg /L <br />0.0010 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Run: ICPMS4- C_140929A <br />ND - Not detected at the reporting limit. <br />Batch: R191677 <br />09/29/14 14:56 <br />09/29/14 17:59 <br />09/29/14 18:03 <br />0.9 20 <br />09/29/14 19:09 <br />2.6 <br />09/30/14 00:14 <br />09/30/14 00:18 <br />20 <br />Page 7 of 13 <br />Run: ICPMS4- C_140929A <br />115 <br />70 130 <br />Run: ICPMS4- C_140929A <br />116 <br />70 130 <br />Run: ICPMS4- C_140929A <br />105 <br />85 115 <br />Run: ICPMS4- C_140929A <br />107 <br />70 130 <br />Run: ICPMS4- C_140929A <br />110 <br />70 130 <br />ND - Not detected at the reporting limit. <br />Batch: R191677 <br />09/29/14 14:56 <br />09/29/14 17:59 <br />09/29/14 18:03 <br />0.9 20 <br />09/29/14 19:09 <br />2.6 <br />09/30/14 00:14 <br />09/30/14 00:18 <br />20 <br />Page 7 of 13 <br />