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ENERGY <br />'_A'3C NAI CNIF_'i <br />Qualifiers: <br />Client: Cotter Corporation <br />Project: Schwartz GW 5/26/11 S25771 <br />E200.8 <br />Method: <br />Sample ID: LRB <br />Antimony <br />Copper <br />Thallium <br />Uranium <br />www.eriereyiab.cem Helena, MT 877 - 472 -0711 • Billings, MT 800- 735 -4488 • Casper, WY 888 - 235 -0515 <br />4I blicsi Wee= Sta s test Gillette, WY 866 -686 -7175 • Rapid City, SD 888 - 672 -1225 • College Station, 1X 888 -680 -2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />4 Method Blank <br />ND mg /L <br />ND mg /L <br />ND mg /L <br />ND mg /L <br />0.0010 <br />0.0010 <br />0.00020 <br />0.00020 <br />Run: ICPMS2 -C 110531A <br />Sample ID: LFB 4 Laboratory Fortified Blank Run: ICPMS2- C_110531A <br />Antimony 0.0534 mg /L 0.0010 107 85 115 <br />Copper 0.0541 mg /L 0.0010 108 85 115 <br />Thallium 0.0530 mg /L 0.0010 106 85 115 <br />Uranium 0.0501 mg /L 0.00030 100 85 115 <br />Report Date: 07/11/11 <br />Work Order: C11050928 <br />Batch: R146437 <br />05/31/11 12:58 <br />05/31/11 13:01 <br />Sample ID: C11050969- 010CMS4 4 Sample Matrix Spike Run: ICPMS2- C_110531A 05/31/11 18:13 <br />Antimony 0.0448 mg /L 0.0010 89 70 130 <br />Copper 0.0460 mg /L 0.010 76 70 130 <br />Thallium 0.0472 mg /L 0.0010 94 70 130 <br />Uranium 26.1 mg /L 0.00030 70 130 A <br />Sample ID: 011050969- 010CMSD 4 Sample Matrix Spike Duplicate Run: ICPMS2- C_110531A 05/31/11 18:16 <br />Antimony 0.0518 mg /L 0.0010 103 70 130 14 20 <br />Copper 0.0498 mg /L 0.010 83 70 130 7.9 20 <br />Thallium 0.0517 mg /L 0.0010 103 70 130 9.1 20 <br />Uranium 28.0 mg /L 0.00030 70 130 7.1 20 A <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 20 <br />