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www.ewm4ab.com ( Helena, MT 877- 472 -0711 - Billings, W 800 - 735 -4489 - Casper, WY 888 - 235 -8515 <br />Aw#flWEwab=Sk' IJ32 ) Gillette, WY 886 - 686 -7175 - Rapid City, SD 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 />Project: Schwartz SW 5/22/13 S26996 <br />LCS3 -37652 <br />6 Laboratory Control Sample <br />Batch: 37652 <br />Sample ID: MB -37652 <br />6 Method Blank <br />Report Date: <br />Work Order: <br />06/21/13 <br />C13050909 <br />Analyte Count <br />Result <br />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 />Silver <br />ND <br />Analytical Run: ICPMS4- C_130611A <br />Sample ID: ICV 6 Initial Calibration Verification <br />Standard <br />ND <br />mg /L <br />6E -05 <br />06/11/13 19:01 <br />Antimony <br />0.0532 <br />mg /L <br />0.0010 <br />106 <br />90 <br />110 <br />104 <br />Copper <br />0.0519 <br />mg /L <br />0.0010 <br />104 <br />90 <br />110 <br />98 <br />Lead <br />0.0486 <br />mg /L <br />0.0010 <br />97 <br />90 <br />110 <br />106 <br />Silver <br />0.0212 <br />mg /L <br />0.0010 <br />106 <br />90 <br />110 <br />Thallium <br />0.0485 <br />mg /L <br />0.0010 <br />97 <br />90 <br />110 <br />106 <br />Uranium <br />0.0477 <br />mg /L <br />0.00030 <br />95 <br />90 <br />110 <br />94 <br />Method: E200.8 <br />LCS3 -37652 <br />6 Laboratory Control Sample <br />Batch: 37652 <br />Sample ID: MB -37652 <br />6 Method Blank <br />Run: ICPMS4 -C 130611A 06/12/13 00:50 <br />Antimony <br />ND <br />mg /L <br />0.0002 <br />Copper <br />0.0002 <br />mg /L <br />0.0002 <br />Lead <br />ND <br />mg /L <br />4E -05 <br />Silver <br />ND <br />mg /L <br />0.0002 <br />Thallium <br />ND <br />mg /L <br />6E -05 <br />Uranium <br />6E -05 <br />mg /L <br />4E -05 <br />Sample ID: <br />LCS3 -37652 <br />6 Laboratory Control Sample <br />Run: ICPMS4- C_130611A <br />06/12/13 00:54 <br />Antimony <br />0.547 mg /L <br />0.0010 <br />109 <br />85 115 <br />Copper <br />0.483 mg /L <br />0.0050 <br />96 <br />85 115 <br />Lead <br />0.505 mg /L <br />0.0010 <br />101 <br />85 115 <br />Silver <br />0.0521 mg /L <br />0.0010 <br />104 <br />85 115 <br />Thallium <br />0.488 mg /L <br />0.00050 <br />98 <br />85 115 <br />Uranium <br />0.531 mg /L <br />0.00030 <br />106 <br />85 115 <br />Sample ID: <br />C13050907 -001 DMS3 <br />6 Sample Matrix Spike <br />Run: ICPMS4- C_130611 A <br />06/12/13 01:06 <br />Antimony <br />0.529 mg /L <br />0.0010 <br />106 <br />70 130 <br />Copper <br />0.472 mg /L <br />0.0050 <br />94 <br />70 130 <br />Lead <br />0.505 mg /L <br />0.0010 <br />101 <br />70 130 <br />Silver <br />00517 mg /L <br />0.0010 <br />102 <br />70 130 <br />Thallium <br />0.492 mg /L <br />0.00050 <br />98 <br />70 130 <br />Uranium <br />0.583 mg /L <br />0.00030 <br />108 <br />70 130 <br />Sample ID: <br />C13050907 -001 DMSD3 <br />6 Sample Matrix Spike Duplicate <br />Run: ICPMS4- C_130611 A <br />06/12/13 01:26 <br />Antimony <br />0.545 mg /L <br />0.0010 <br />109 <br />70 130 <br />2.8 <br />20 <br />Copper <br />0.494 mg /L <br />0.0050 <br />98 <br />70 130 <br />4.5 <br />20 <br />Lead <br />0.523 mg /L <br />0.0010 <br />105 <br />70 130 <br />3.6 <br />20 <br />Silver <br />0.0534 mg /L <br />0.0010 <br />106 <br />70 130 <br />3.3 <br />20 <br />Thallium <br />0.510 mg /L <br />0.00050 <br />102 <br />70 130 <br />3.6 <br />20 <br />Uranium <br />0.597 mg /L <br />0.00030 <br />111 <br />70 130 <br />2.3 <br />20 <br />Method: <br />E200.8 <br />Batch: R174698 <br />Sample ID: <br />LRB <br />Method Blank <br />Run: ICPMS4- C_130611A <br />06/11/13 18:02 <br />Silver <br />ND mg /L <br />6E -05 <br />Sample ID: <br />LFB <br />Laboratory Fortified Blank <br />Run: ICPMS4- C_130611A <br />06/11/13 18:07 <br />Silver <br />0.0204 mg /L <br />0.0010 <br />102 <br />85 115 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 15 of 26 <br />