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:. . <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: M-1978-] 16 SM-18 Mine <br />Report Date: 04/07/05 <br />Work Order: 005030810 <br />Analyte Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: SW6020 Balch: 7589 <br />Sample ID: MB-7589 Method Bfank 03/31/05 17:13 <br />Aluminum 0.002 mg/L 0.0002 <br />Antimony ND mg/L 0.00004 <br />Arsenic ND mg/L 0.0001 <br />Barium 0.0005 mg/L 0.00008 <br />Beryllium ND mg/L 0.00008 <br />Cadmium ND mg/L 0.0002 <br />Chromium 0.0006 mg/L 0.0001 <br />Copper 0.0002 mg/L 0.00004 <br />Lead 0.00006 mg/L 0.00006 <br />Manganese 0.00007 mg/L 0.00004 <br />Mercury ND mg/L 0,00002 <br />Nickef ND mg/L 0.00006 <br />Selenium ND mg/L 0.0004 <br />Silver 0.0001 mg/L 0.00002 <br />Thallium ND mg/L 0.00005 <br />Uranium ND mg/L 0.00006 <br />Zinc 0.001 mg/L 0.0002 <br />Sample ID: C05030810.001AMS4 Post Digestion Spike 03/3110517:28 <br />Aluminum 0.744 mg/L 0.10 0 75 125 A <br />Antimony 0.0541 mg/L 0.050 106 75 125 <br />Arsenic 0.0662 mg/L 0.0010 102 75 125 <br />Barium 0.0748 mg/L 0.10 107 75 125 <br />Beryllium 0.0498 mg/L 0.010 99.6 75 125 <br />Cadmium 0.0526 mg/L 0.010 105 75 125 <br />Chromium 0.0513 mg/L 0.050 102 75 125 <br />Copper 0.0549 mg/L 0.010 108 75 125 <br />Lead 0.0531 mg/L 0.050 104 75 125 <br />Manganese 0.0545 mgrL 0.010 103 75 125 <br />Mercury 0.00523 mg/L 0.0010 104 75 125 <br />Nickel 0.0515 mg/L 0.050 102 75 125 <br />Selenium 0.135 mg/L 0.0010 97.7 75 125 <br />Silver 0.0171 mg/L 0.010 85.2 75 125 <br />Thallium 0.0516 mg/L 0.10 103 75 125 <br />Uranium 0.0556 mg/L 0.00030 107 75 125 <br />Zinc 0.0689 mg/L 0.010 111 75 125 <br />Sample ID: 005030810-001AMSD4 Post Digestion Spike Dup 03/31/05 17:35 <br />Aluminum 0.707 mg/L 0.10 0 75 125 5.0 20 A <br />Antimony 0.0557 mg/L 0.050 109 75 125 2.9 20 <br />Arsenic 0.0668 mg/L 0.0010 103 75 125 0.8 20 <br />Qualifiers: <br />RL - Anaiyte 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 detectetl at the reporting limit. <br />ENERGY LABORATOR/ES, /NC- • 2393 Sa/1 Creek Highway (82601) • P.O. Box 3258 • Caspei WY82602 <br />Toll Free88B2350515 • 3072350515 • Far 3022341839 • Casper@energylab.com • wwwenergy/ab.com <br />Trac K# 005030810 Page S <br />