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www.ewesb.com Helena, MT 877472 -0711 • Billings, W 888 - 7354489 • Casper, WY 888 - 235 -8515 <br />"*"Ewshm SAW# Im f Gillette, WY 866 -686 -7175 • Rapid City, SD 888 -672 -1225 • College Station, TX 888 -698 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 08/26/13 <br />Project: Schwartz GW 08/08/13 S27024 & S27025 Work Order: C13080364 <br />Analyte Count Result Units RL ° /diEC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.8 <br />E200.8 <br />Analytical Run: ICPMS4- C_130823A <br />Sample ID: ICV <br />8 Initial Calibration Verification <br />Standard <br />MB -38663 <br />6 Method Blank <br />08/23/13 11:06 <br />Antimony <br />0.0522 <br />mg /L <br />0.0010 <br />104 <br />90 <br />110 <br />Arsenic <br />0.0508 <br />mg /L <br />0.0010 <br />102 <br />90 <br />110 <br />Copper <br />0.0514 <br />mg /L <br />0.0010 <br />103 <br />90 <br />110 <br />Lead <br />0.0494 <br />mg /L <br />0.0010 <br />99 <br />90 <br />110 <br />Molybdenum <br />0.0480 <br />mg /L <br />0.0010 <br />96 <br />90 <br />110 <br />Silver <br />0.0215 <br />mg /L <br />0.0010 <br />107 <br />90 <br />110 <br />Thallium <br />0.0510 <br />mg /L <br />0.0010 <br />102 <br />90 <br />110 <br />Uranium <br />0.0499 <br />mg /L <br />0.00030 <br />100 <br />90 <br />110 <br />Method: <br />E200.8 <br />Batch: 38663 <br />Sample ID: <br />MB -38663 <br />6 Method Blank <br />Run: ICPMS4- C_130823A <br />08/23/13 23:19 <br />Antimony <br />0.0006 <br />mg /L <br />0.0002 <br />Arsenic <br />0.0008 <br />mg /L <br />0.0004 <br />Copper <br />0.0004 <br />mg /L <br />0.0002 <br />Lead <br />ND <br />mg /L <br />4E -05 <br />Silver <br />0.0002 <br />mg /L <br />0.0002 <br />Thallium <br />ND <br />mg /L <br />6E -05 <br />Sample ID: <br />LCS3 -38663 <br />6 Laboratory Control Sample <br />Run: ICPMS4- C_130823A <br />08/23/13 23:23 <br />Antimony <br />0.514 <br />mg /L <br />0.0010 <br />103 <br />85 115 <br />Arsenic <br />0.494 <br />mg /L <br />0.0010 <br />99 <br />85 115 <br />Copper <br />0.532 <br />mg /L <br />0.0050 <br />106 <br />85 115 <br />Lead <br />0.495 <br />mg /L <br />0.0010 <br />99 <br />85 115 <br />Silver <br />0.0531 <br />mg /L <br />0.0010 <br />106 <br />85 115 <br />Thallium <br />0.489 <br />mg /L <br />0.00050 <br />98 <br />85 115 <br />Sample ID: <br />C13080370 -001 AMS3 <br />6 Sample Matrix Spike <br />Run: ICPMS4- C_130823A <br />08/23/13 23:36 <br />Antimony <br />0.526 <br />mg /L <br />0.0012 <br />105 <br />70 130 <br />Arsenic <br />0.511 <br />mg /L <br />0.0010 <br />101 <br />70 130 <br />Copper <br />0.535 <br />mg /L <br />0.0050 <br />106 <br />70 130 <br />Lead <br />0.510 <br />mg /L <br />0.0010 <br />101 <br />70 130 <br />Silver <br />0.0488 <br />mg /L <br />0.0010 <br />98 <br />70 130 <br />Thallium <br />0.497 <br />mg /L <br />0.00050 <br />99 <br />70 130 <br />Sample ID: <br />C13080370- 001AMSD3 <br />6 Sample Matrix Spike Duplicate <br />Run. ICPMS4- C_130823A <br />08/23/13 23:40 <br />Antimony <br />0.528 <br />mg /L <br />0.0012 <br />106 <br />70 130 <br />0.3 <br />20 <br />Arsenic <br />0.507 <br />mg /L <br />0.0010 <br />100 <br />70 130 <br />0.9 <br />20 <br />Copper <br />0.530 <br />mg /L <br />0.0050 <br />105 <br />70 130 <br />0.9 <br />20 <br />Lead <br />0.516 <br />mg /L <br />0.0010 <br />103 <br />70 130 <br />1.1 <br />20 <br />Silver <br />0.0500 <br />mg /L <br />0.0010 <br />100 <br />70 130 <br />2.4 <br />20 <br />Thallium <br />0.504 <br />mg /L <br />0.00050 <br />101 <br />70 130 <br />1.5 <br />20 <br />Method: <br />E200.8 <br />Batch: R177526 <br />Sample ID: <br />LRB <br />5 Method Blank <br />Run. ICPMS4 -C 130823A <br />08/23/13 12:07 <br />Antimony <br />0.0005 <br />mg /L <br />0.0001 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 12 of 23 <br />