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www.erw&b.com � Helena, MT 077- 472 -0711 - Billings, W 800- 735 -4489 - Casper, WY 888- 235 -0515 <br />Aea"WE=m6mSkw 1W '� Gillette, WY 866 -686 -7175 - Rapid City, SO 886 -872 -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 Fortified Blank <br />Batch: R175264 <br />Sample ID: LRB <br />5 Method Blank <br />Report Date: <br />07/08/13 <br />Project: Schwartz GW 6/6/2013 S26941 <br />0.0004 <br />mg /L <br />0.0001 <br />Copper <br />ND <br />Work Order: <br />C13060270 <br />FAnalyte Count <br />Result <br />Units <br />RL <br />%REC <br />Low Limit <br />High Limit RPD <br />RPDLimit Qual <br />Method: E200.8 <br />8E -05 <br />mg /L <br />9E -06 <br />Thallium <br />0.0532 mg /L <br />Analytical Run: ICPMS4- C_130626A <br />Sample ID: ICV 5 Initial <br />Calibration Verification <br />Standard <br />Uranium <br />0.0532 mg /L <br />06/25/13 16:34 <br />Antimony <br />0.0504 <br />mg /L <br />0.0010 <br />101 <br />90 <br />110 <br />Copper <br />0.0484 <br />mg /L <br />0.0010 <br />97 <br />90 <br />110 <br />70 130 <br />Molybdenum <br />0.0470 <br />mg /L <br />0.0010 <br />94 <br />90 <br />110 <br />Thallium <br />0.0508 <br />mg /L <br />0.0010 <br />102 <br />90 <br />110 <br />Uranium <br />0.0501 <br />mg /L <br />0.00030 <br />100 <br />90 <br />110 <br />Uranium <br />Method: E200.8 <br />5 Laboratory Fortified Blank <br />Batch: R175264 <br />Sample ID: LRB <br />5 Method Blank <br />06/25/13 15:27 <br />Run: ICPMS4 -C 130626A 06/25/13 15:22 <br />Antimony <br />0.0004 <br />mg /L <br />0.0001 <br />Copper <br />ND <br />mg /L <br />3E -05 <br />Molybdenum <br />7E -05 <br />mg /L <br />3E -05 <br />Thallium <br />ND <br />mg /L <br />6E -05 <br />Uranium <br />8E -05 <br />mg /L <br />9E -06 <br />Sample ID: LFB <br />5 Laboratory Fortified Blank <br />Run: ICPMS4- C_130626A <br />06/25/13 15:27 <br />Antimony <br />0.0504 mg /L <br />0.0010 <br />100 <br />85 115 <br />Copper <br />0.0507 mg /L <br />0.0010 <br />101 <br />85 115 <br />Molybdenum <br />0.0503 mg /L <br />0.0010 <br />101 <br />85 115 <br />Thallium <br />0.0532 mg /L <br />0.0010 <br />106 <br />85 115 <br />Uranium <br />0.0532 mg /L <br />0.00030 <br />106 <br />85 115 <br />Sample ID: C13060270- 001CMS4 <br />5 Sample Matrix Spike <br />Run: ICPMS4- C_130626A <br />06/25/13 18:20 <br />Antimony <br />0.0565 mg /L <br />0.0010 <br />113 <br />70 130 <br />Copper <br />0.0512 mg /L <br />0.0050 <br />90 <br />70 130 <br />Molybdenum <br />0.0713 mg /L <br />0.0010 <br />96 <br />70 130 <br />Thallium <br />0.0571 mg /L <br />0.00050 <br />114 <br />70 130 <br />Uranium <br />3.55 mg /L <br />0.00030 <br />70 130 <br />A <br />Sample ID: C13060270 -001 CMSD4 <br />5 Sample Matrix Spike Duplicate <br />Run: ICPMS4- C_130626A <br />06/25/13 18:24 <br />Antimony <br />0.0576 mg /L <br />0.0010 <br />115 <br />70 130 <br />2.0 <br />20 <br />Copper <br />0.0508 mg /L <br />0.0050 <br />90 <br />70 130 <br />0.6 <br />20 <br />Molybdenum <br />0.0726 mg /L <br />0.0010 <br />98 <br />70 130 <br />1.8 <br />20 <br />Thallium <br />0.0574 mg /L <br />0.00050 <br />115 <br />70 130 <br />0.5 <br />20 <br />Uranium <br />3.57 mg /L <br />0.00030 <br />70 130 <br />0.6 <br />20 A <br />Qualifiers: <br />RL - Analyte reporting limit. <br />ND - Not detected at the reporting limit. <br />A -The analyte level was greater than four times the spike level. In <br />accordance with the method % recovery is not calculated. <br />MDC - Minimum detectable concentration <br />Page 11 of 21 <br />