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ENERGY <br />A'- O - Al <br />Qualifiers: <br />"Maenad ab wm <br />AsalyttatErcallatteSaca1852 <br />Client: Cotter Corporation <br />Project: Schwartz GW 4/20/11 S25759- S25760 <br />Helena, NT 877.472 -0711 • Billings, BIT B00 -735 -4488 • Casper, WY 888 -235 -0515 <br />Gillette, WY 866 -588 -7175 • Rapid City, SD 88B- 672 -1229 • College Station, TX 888 -690 -2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />F epoit Date: 05 /19/11 <br />Work Dicier: C11040679 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.8 <br />Sample ID: LRB 6 Method Blank Run: ICPMS2- C . _.110426A <br />Antimony ND mg /L 7E -05 <br />Copper ND mg /L 7E -05 <br />Manganese ND mg /L 5E -05 <br />Molybdenum ND mg /L 5E -05 <br />Thallium ND mg /L 1 E -05 <br />Uranium ND mg /L 1E-05 <br />Sample ID: LFB 6 Laboratory Fortified Blank Run: ICPMS2- C_110426A 04/26/11 10:19 <br />Antimony 0.0487 mg /L 0.0010 97 85 115 <br />Copper 0.0472 mg /L 0.0010 94 85 115 <br />Manganese 0.0492 mg /L 0.0010 98 85 115 <br />Molybdenum 0.0490 mg /L 0.0010 98 85 115 <br />Thallium 0.0495 mg /L 0.0010 99 85 115 <br />Uranium 0.0501 mg /L 0.00030 100 85 115 <br />Sample ID: C11040706- 003CMS4 6 Sample Matrix Spike Run: ICPMS2- C_110426A 04/26/11 20:07 <br />Antimony 0.0504 mg /L 0.050 101 70 130 <br />Copper 0.0478 mg /L 0.010 95 70 130 <br />Manganese 0.0489 mg /L 0.010 96 70 130 <br />Molybdenum 0.0498 mg /L 0.0010 97 70 130 <br />Thallium 0.0488 mg /L 0.0010 98 70 130 <br />Uranium 2.08 mg /L 0.00030 70 130 A <br />Sample ID: C11040706- 003CMSD 6 Sample Matrix Spike Duplicate Run: ICPMS2- C_110426A 04/26/11 20:14 <br />Antimony 0.0505 mg /L 0.050 101 70 130 0.2 20 <br />Copper 0.0476 mg /L 0.010 95 70 130 0.5 20 <br />Manganese 0.0488 mg /L 0.010 96 70 130 0.1 20 <br />Molybdenum 0.0494 mg /L 0.0010 96 70 130 0.7 20 <br />Thallium 0.0487 mg /L 0.0010 97 70 130 0.1 20 <br />Uranium 2.06 mg /L 0.00030 70 130 0.6 20 A <br />Batch: R145209 <br />04/26/11 10:12 <br />RL - Analyte reporting limit. A - The analyte level was greater than four times the spike level. In <br />accordance with the method % recovery is not calculated. <br />ND - Not detected at the reporting limit. MDC - Minimum detectable concentration <br />Page 9 of 23 <br />