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wwwtwalab.com � � J <br />Helena, MT 871-472 -0711 • Billings, MT 800 - 735.4489 • Casper, WY 888- 235 -0515 <br />1JV Gillette, WY 866 -606 -7175 • Rapid City, So 886 -672 -1225 • College Station, TX 888 -690 -2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />4 Laboratory Control Sample <br />Batch: 37487 <br />Sample ID: MB -37487 <br />4 Method Blank <br />Report Date: <br />06/06/13 <br />Project: Schwartz SW 05/08/13 S26872 <br />ND <br />mg /L <br />0.0005 <br />Chromium <br />0.0006 <br />Work Order: <br />013050363 <br />Analyte Count <br />Result <br />Units <br />RL <br />° /6REC <br />Low Limit <br />High Limit RPD <br />RPDLimit Qual <br />Method: E200.8 <br />85 115 <br />Zinc <br />0.519 mg /L <br />Analytical Run: ICPMS4- C_130515A <br />Sample ID: ICV 4 Initial <br />Calibration Verification Standard <br />Sample ID: C13050337- 001DMS3 <br />05/15/13 13:23 <br />Boron <br />0.0539 <br />mg /L <br />0.0010 <br />108 <br />90 <br />110 <br />0.050 <br />Chromium <br />0.0495 <br />mg /L <br />0.0010 <br />99 <br />90 <br />110 <br />103 <br />Iron <br />1.02 <br />mg /L <br />0.0010 <br />102 <br />90 <br />110 <br />70 130 <br />Zinc <br />0.0507 <br />mg /L <br />0.0010 <br />101 <br />90 <br />110 <br />Method: E200.8 <br />4 Laboratory Control Sample <br />Batch: 37487 <br />Sample ID: MB -37487 <br />4 Method Blank <br />05/16/13 06:39 <br />Run: ICPMS4 -C 130515A 05/16/13 06:34 <br />Boron <br />ND <br />mg /L <br />0.0005 <br />Chromium <br />0.0006 <br />mg /L <br />1 E -05 <br />Iron <br />0.002 <br />mg /L <br />0.0008 <br />Zinc <br />0.0004 <br />mg /L <br />0.0002 <br />Sample ID: LCS3 -37487 <br />4 Laboratory Control Sample <br />Run: ICPMS4- C_130515A <br />05/16/13 06:39 <br />Boron <br />0.497 mg /L <br />0.050 <br />99 <br />85 115 <br />Chromium <br />0.499 mg /L <br />0.0050 <br />100 <br />85 115 <br />Iron <br />2.50 mg /L <br />0.030 <br />100 <br />85 115 <br />Zinc <br />0.519 mg /L <br />0.010 <br />104 <br />85 115 <br />Sample ID: C13050337- 001DMS3 <br />4 Sample Matrix Spike <br />Run: ICPMS4- C_130515A <br />05/16/13 06:51 <br />Boron <br />0.504 mg /L <br />0.050 <br />92 <br />70 130 <br />Chromium <br />0.516 mg /L <br />0.0050 <br />103 <br />70 130 <br />Iron <br />2.41 mg /L <br />0.030 <br />95 <br />70 130 <br />Zinc <br />0.472 mg /L <br />0.010 <br />93 <br />70 130 <br />Sample ID: C13050337- 001DMSD3 <br />4 Sample Matrix Spike Duplicate <br />Run: ICPMS4- C_130515A <br />05/16/13 06:54 <br />Boron <br />0.492 mg /L <br />0.050 <br />90 <br />70 130 <br />2.4 <br />20 <br />Chromium <br />0.500 mg /L <br />0.0050 <br />100 <br />70 130 <br />3.2 <br />20 <br />Iron <br />2.43 mg /L <br />0.030 <br />95 <br />70 130 <br />0.9 <br />20 <br />Zinc <br />0.459 mg /L <br />0.010 <br />90 <br />70 130 <br />2.9 <br />20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 16 of 26 <br />