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WWWO a &sb.COM Helena, MT 877472 -0711 • Billings, MT 800- 7354489 • Casper, WY 888 - 235 -0515 <br />EtZM 1M Gillette, WY 866- 686 -7175 • Rapid City, SD 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 />5 Laboratory Control Sample <br />Batch: 37569 <br />Sample ID: MB -37569 <br />Report Date: <br />06/18/13 <br />Project: Schwartz GW 5/15/2013 S26920 & S26921 <br />Antimony <br />0.0007 <br />mg /L <br />Work Order: <br />C13050697 <br />Analyte <br />Count Result Units <br />RL <br />%REC <br />Low Limit <br />High Limit RPD <br />RPDLimit Qual <br />Method: E200.8 <br />ND <br />mg /L <br />4E -05 <br />Thallium <br />Analytical Run: ICPMS4- C_130605A <br />Sample ID: ICV <br />5 Initial Calibration Verification Standard <br />Lead <br />0.510 mg /L <br />0.0010 <br />06/05/13 23:01 <br />Antimony <br />0.0535 mg /L <br />0.0010 <br />107 <br />90 <br />110 <br />99 <br />Arsenic <br />0.0503 mg /L <br />0.0010 <br />101 <br />90 <br />110 <br />Copper <br />0.0505 mg /L <br />0.0010 <br />101 <br />90 <br />110 <br />108 <br />Lead <br />0.0492 mg /L <br />0.0010 <br />99 <br />90 <br />110 <br />99 <br />Thallium <br />0.0500 mg /L <br />0.0010 <br />100 <br />90 <br />110 <br />95 <br />Method: E200.8 <br />5 Laboratory Control Sample <br />Batch: 37569 <br />Sample ID: MB -37569 <br />5 Method Blank <br />06/05/13 23:32 <br />Run: ICPMS4- C_130605A 06/05/13 23:27 <br />Antimony <br />0.0007 <br />mg /L <br />0.0002 <br />Arsenic <br />0.0007 <br />mg /L <br />0.0004 <br />Copper <br />ND <br />mg /L <br />0.0002 <br />Lead <br />ND <br />mg /L <br />4E -05 <br />Thallium <br />ND <br />mg /L <br />6E -05 <br />Sample ID: LCS3 -37569 <br />5 Laboratory Control Sample <br />Run: ICPMS4- C_130605A <br />06/05/13 23:32 <br />Antimony <br />0.545 mg /L <br />0.0010 <br />109 <br />85 115 <br />Arsenic <br />0.502 mg /L <br />0.0010 <br />100 <br />85 115 <br />Copper <br />0.508 mg /L <br />0.0050 <br />102 <br />85 115 <br />Lead <br />0.510 mg /L <br />0.0010 <br />102 <br />85 115 <br />Thallium <br />0.494 mg /L <br />0.00050 <br />99 <br />85 115 <br />Sample ID: C13050693- 001CMS3 <br />5 Sample Matrix Spike <br />Run: ICPMS4- C_130605A <br />06/05/13 23:44 <br />Antimony <br />0.542 mg /L <br />0.0010 <br />108 <br />70 130 <br />Arsenic <br />0.497 mg /L <br />0.0010 <br />99 <br />70 130 <br />Copper <br />0.671 mg /L <br />0.0050 <br />95 <br />70 130 <br />Lead <br />0.527 mg /L <br />0.0010 <br />103 <br />70 130 <br />Thallium <br />0.503 mg /L <br />0.00050 <br />101 <br />70 130 <br />Sample ID: C13050693- 001CMSD3 <br />5 Sample Matrix Spike Duplicate <br />Run: ICPMS4- C_130605A <br />06/05/13 23:48 <br />Antimony <br />0.543 mg /L <br />0.0010 <br />108 <br />70 130 <br />0.2 <br />20 <br />Arsenic <br />0.500 mg /L <br />0.0010 <br />99 <br />70 130 <br />0.7 <br />20 <br />Copper <br />0.676 mg /L <br />0.0050 <br />96 <br />70 130 <br />0.8 <br />20 <br />Lead <br />0.522 mg /L <br />0.0010 <br />102 <br />70 130 <br />1.0 <br />20 <br />Thallium <br />0.495 mg /L <br />0.00050 <br />99 <br />70 130 <br />1.7 <br />20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 12 of 24 <br />