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m Slim- www.ewdab.com Helena, MT 877- 472 -0711 • Billings, MT 800- 735 -4489 a Casper, WY 888- 235 -0515 <br />' s= IZ2 Gillette, WY 866 -686 -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 <br />Run: ICPMS4- C_130605A <br />Report Date: <br />06/11/13 <br />Project: Schwartz GW 05/18/13 S26985 & S26986 <br />Work Order: <br />C13050721 <br />Analyte <br />Count Result Units RL <br />%REC Low Limit High Limit RPD <br />RPDLimit Qual <br />Method: E200.8 <br />Zinc <br />Analytical Run: ICPMS4- C_130605A <br />Sample ID: ICV <br />2 Initial Calibration Verification Standard <br />Sample ID: LCS3 -37571 <br />06/05/13 11:24 <br />Arsenic <br />0.0507 mg /L 0.0010 <br />101 90 110 <br />Zinc <br />0.0525 mg /L 0.0010 <br />105 90 110 <br />Method: E200.8 <br />Run: ICPMS4- C_130605A <br />97 <br />85 115 <br />Sample ID: MB -37571 <br />2 <br />Method Blank <br />Run: ICPMS4- C_130605A <br />Arsenic <br />70 130 <br />0.0007 mg /L <br />0.0004 <br />Zinc <br />Run: ICPMS4- C_130605A <br />ND mg /L <br />0.0006 <br />Sample ID: LCS3 -37571 <br />2 <br />Laboratory Control Sample <br />Arsenic <br />0.485 mg /L <br />0.0010 <br />Zinc <br />0.505 mg /L <br />0.010 <br />Sample ID: C13050708- 002DMS3 <br />2 <br />Sample Matrix Spike <br />Arsenic <br />0.480 mg /L <br />0.0010 <br />Zinc <br />0.469 mg /L <br />0.010 <br />Sample ID: C13050708- 002DMSD <br />2 <br />Sample Matrix Spike Duplicate <br />Arsenic <br />0.484 mg /L <br />0.0010 <br />Zinc <br />0.468 mg /L <br />0.010 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Run: ICPMS4 -C 130605A <br />ND - Not detected at the reporting limit. <br />Batch: 37571 <br />06/06/13 00:31 <br />06/06/13 00:35 <br />06/06/13 00:52 <br />06/06/13 01:14 <br />0.9 20 <br />0.2 20 <br />Page 13 of 24 <br />Run: ICPMS4- C_130605A <br />97 <br />85 115 <br />101 <br />85 115 <br />Run: ICPMS4- C_130605A <br />95 <br />70 130 <br />94 <br />70 130 <br />Run: ICPMS4- C_130605A <br />96 <br />70 130 <br />94 <br />70 130 <br />ND - Not detected at the reporting limit. <br />Batch: 37571 <br />06/06/13 00:31 <br />06/06/13 00:35 <br />06/06/13 00:52 <br />06/06/13 01:14 <br />0.9 20 <br />0.2 20 <br />Page 13 of 24 <br />