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ENERGY <br />www.energylab.cem <br />Aistyficat Eg$ilanca Ma 7952 <br />Client: Cotter Corporation <br />Project: Schwartz GW 5/12/2011 S25787 <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 />Batch: 29893 <br />05/19/11 19:16 <br />Method: E200.8 <br />Sample ID: MB -29893 <br />Antimony <br />Arsenic <br />Copper <br />Lead <br />Silver <br />Thallium <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />6 Method Blank <br />ND mg /L 0.0010 <br />ND mg /L 0.0010 <br />0.00109 mg /L 0.0010 <br />ND mg /L 0.0050 <br />ND mg /L 0.00020 <br />ND mg /L 0.00020 <br />Helena, MT 877 - 472 - 0711 • Billings, MT 800 - 735 - 4489 • Casper, WY 888 - 235 - 0515 <br />Gillette, WY 866 686 - 7175 • Rapid City, SD 888 - 672 - 1225 • College Station, TX 888 -690 - 2218 <br />Run: ICPMS2- C_110518A <br />Report Date: 06/15/11 <br />Work Order: C11050500 <br />Sample ID: LCS3 -29893 6 Laboratory Control Sample Run: ICPMS2- C_110518A 05/19/11 19:22 <br />Antimony 0.536 mg /L 0.050 107 85 115 <br />Arsenic 0.519 mg /L 0.0010 104 85 115 <br />Copper ' 0.522 mg /L 0.010 104 85 115 <br />Lead 0.528 mg /L 0.050 106 85 115 <br />Silver 0.0522 mg /L 0.010 104 85 115 <br />Thallium 0.522 mg /L 0.10 104 85 115 <br />Sample ID: 011050586- 001CMS3 6 Sample Matrix Spike Run: ICPMS2- C_110518A 05/19/11 20:44 <br />Antimony 0.515 mg /L 0.050 103 70 130 <br />Arsenic 0.510 mg /L 0.0010 101 70 130 <br />Copper 0.509 mg /L 0.010 100 70 130 <br />Lead 0.529 mg /L 0.050 105 70 130 <br />Silver 0.0504 mg /L 0.010 100 70 130 <br />Thallium 0.518 mg /L 0.10 104 70 130 <br />Sample ID: C11050586- 001CMSD 6 Sample Matrix Spike Duplicate Run: ICPMS2- C_110518A 05/19/11 20:50 <br />Antimony 0.506 mg /L 0.050 101 70 130 1.8 20 <br />Arsenic 0.493 mg /L 0.0010 98 70 130 3.3 20 <br />Copper 0.490 mg /L 0.010 96 70 130 3.9 20 <br />Lead 0.519 mg /L 0.050 103 70 130 1.9 20 <br />Silver 0.0485 mg /L 0.010 97 70 130 3.8 20 <br />Thallium 0.511 mg /L 0.10 102 70 130 1.4 20 <br />Method: E200.8 <br />Sample ID: LRB 8 Method Blank Run: ICPMS2- C_110518A <br />Aluminum ND mg /L 0.20 <br />Antimony ND mg /L 0.0010 <br />Copper ND mg /L 0.0010 <br />Manganese ND mg /L 0.0050 <br />Molybdenum ND mg /L 0.0050 <br />Thallium ND mg /L 0.00020 <br />Uranium ND mg /L 0.00020 <br />Zinc ND mg /L 0.0050 <br />Sample ID: LFB 8 Laboratory Fortified Blank Run: ICPMS2- C_110518A <br />Aluminum 0.0508 mg /L 0.0010 96 85 115 <br />Antimony 0.0524 mg /L 0.0010 105 85 115 <br />Copper 0.0489 mg /L 0.0010 98 85 115 <br />ND - Not detected at the reporting limit. <br />Batch: R146012 <br />05/18/11 12:42 <br />Page 9 of 20 <br />05/18/11 12:48 <br />