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' R www.aw&ab.com <br />Laboratory Control Sample <br />Helena, MT 877472 -0711 • Billings, MT 800 - 7354469 a Casper, WY 888 -235 -6515 <br />Sample ID: MB -38662 <br />8 Method Blank <br />Gillette, WY 866 -686 -7175 • Rapid City, So 886- 672 -1225 • College Station, TX 888 - 690 -2218 <br />Run: ICPMS4 -C 130814A 08/14/13 23:32 <br />QA /QC <br />Summary Report <br />mg /L <br />0.0002 <br />Arsenic <br />0.0004 <br />Prepared by Casper, WY Branch <br />0.0004 <br />Chromium <br />00004 <br />mg /L <br />0.0003 <br />Copper <br />ND <br />Revised Date: 09/12/13 <br />Client: Cotter Corporation <br />Lead <br />ND <br />mg /L <br />4E -05 <br />Report Date: 09/05/13 <br />Project: Schwartz -SW 8/7/13 S27022 <br />mg /L <br />00002 <br />Thallium <br />ND <br />Work Order: 013080331 <br />Analyte Count <br />Result <br />Units <br />RL ° /.REC Low Limit <br />High Limit RPD RPDLimit Qual <br />Method: E200.8 <br />Thallium <br />0.514 mg /L <br />0.00050 <br />Analytical Run: ICPMS4- C_130814A <br />Sample ID: ICV 8 Initial <br />Calibration Verification Standard <br />Uranium <br />08/14/13 23:06 <br />Antimony <br />0.0528 <br />mg /L <br />0.0010 106 <br />90 <br />110 <br />Arsenic <br />0.0507 <br />mg /L <br />0.0010 101 <br />90 <br />110 <br />Chromium <br />0.0498 <br />mg /L <br />0.0010 100 <br />90 <br />110 <br />Copper <br />0.0515 <br />mg /L <br />0.0010 103 <br />90 <br />110 <br />Lead <br />0.0497 <br />mg /L <br />0.0010 99 <br />90 <br />110 <br />Silver <br />0.0203 <br />mg /L <br />0.0010 101 <br />90 <br />110 <br />Thallium <br />0.0515 <br />mg /L <br />0.0010 103 <br />90 <br />110 <br />Uranium <br />0.0502 <br />mg /L <br />0.00030 100 <br />90 <br />110 <br />Method: E200.8 <br />Laboratory Control Sample <br />Batch: 38662 <br />Sample ID: MB -38662 <br />8 Method Blank <br />Antimony <br />Run: ICPMS4 -C 130814A 08/14/13 23:32 <br />Antimony <br />0.0004 <br />mg /L <br />0.0002 <br />Arsenic <br />0.0004 <br />mg /L <br />0.0004 <br />Chromium <br />00004 <br />mg /L <br />0.0003 <br />Copper <br />ND <br />mg /L <br />0.0002 <br />Lead <br />ND <br />mg /L <br />4E -05 <br />Silver <br />ND <br />mg /L <br />00002 <br />Thallium <br />ND <br />mg /L <br />6E -05 <br />Uranium <br />ND <br />mg /L <br />4E -05 <br />Sample ID: LCS3 -38662 8 <br />Laboratory Control Sample <br />Run: ICPMS4- C_130814A <br />08/14/13 23:37 <br />Antimony <br />0.580 mg /L <br />0.0010 <br />116 <br />85 115 <br />S <br />Arsenic <br />0.512 mg /L <br />0.0010 <br />102 <br />85 115 <br />Chromium <br />0.546 mg /L <br />0.0050 <br />109 <br />85 115 <br />Copper <br />0.558 mg /L <br />0.0050 <br />112 <br />85 115 <br />Lead <br />0.531 mg /L <br />0.0010 <br />106 <br />85 115 <br />Silver <br />0.0512 mg /L <br />0.0010 <br />102 <br />85 115 <br />Thallium <br />0.514 mg /L <br />0.00050 <br />103 <br />85 115 <br />Uranium <br />0.509 mg /L <br />0.00030 <br />102 <br />85 115 <br />- Antimony response is above standard QA limit <br />This could indicate a high bias for the sample <br />results. <br />Since there were no detectable analyte responses, <br />and the <br />remainder of the run QA is within acceptance range, this batch is approved <br />Sample ID: 013080324 -001 BMS3 8 <br />Sample Matrix Spike <br />Run: ICPMS4- C_130814A <br />08/14/13 23:49 <br />Antimony <br />0.582 mg /L <br />0.0010 <br />116 <br />70 130 <br />Arsenic <br />0.510 mg /L <br />0.0010 <br />101 <br />70 130 <br />Chromium <br />0.571 mg /L <br />0.0050 <br />113 <br />70 130 <br />Copper <br />0 683 mg /L <br />0.0050 <br />111 <br />70 130 <br />Lead <br />0.563 mg /L <br />0.0010 <br />112 <br />70 130 <br />Silver <br />0.0491 mg /L <br />0.0010 <br />98 <br />70 130 <br />Thallium <br />0.541 mg /L <br />0.00050 <br />108 <br />70 130 <br />Uranium <br />0.612 mg /L <br />0.00030 <br />122 <br />70 130 <br />Sample ID: C13080324 -001 BMSD3 8 <br />Sample Matrix Spike Duplicate <br />Run ICPMS4- C_130814A <br />08/14/13 23:53 <br />Antimony <br />0.578 mg /L <br />0.0010 <br />115 <br />70 130 0.7 <br />20 <br />Arsenic <br />0.510 mg /L <br />0.0010 <br />101 <br />70 130 0.0 <br />20 <br />Chromium <br />0.569 mg /L <br />0.0050 <br />113 <br />70 130 0.2 <br />20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />ND - <br />Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />S - Spike recovery outside of advisory limits. <br />Page 14 of 26 <br />