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STLSubmission#: 2003-11-0599 <br /> CAM 17 Metals <br /> Geomatrix Consultants <br /> Attn.: Robert Cheung <br /> 2101 Webster Street, 12th Floor <br /> Oakland, CA 94612 <br /> Phone: (510)663-4299 Fax: (510)663-4141 <br /> Project: 7066.001 Received: 11/17/2003 17:15 <br /> Batch QC Report <br /> Prep(s): 3050B Test(s): 6010B <br /> Laboratory Control Spike Soil QC Batch#2003/11/18-03.15 <br /> LCS 2003/11/18-03.15-050 Extracted: 11/18/2003 Analyzed: 11/19/200311:04 <br /> LCSD 2003/11/18-03.15-051 Extracted: 11/18/2003 Analyzed: 11/19/200311:08 <br /> Compound Conic. mg/Kg Exp.Conc. Recovery% RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Antimony 95.4 97.6 100.0 95.4 97.6 2.3 80-120 20 <br /> Arsenic 98.0 99.4 100.0 98.0 99.4 1.4 80-120 20 <br /> Barium 102 103 100.0 102.0 103.0 1.0 80-120 20 <br /> Beryllium 102 104 100.0 102.0 104.0 1.9 80-120 20 <br /> Cadmium 99.3 101 100.0 99.3 101.0 1.7 80-120 20 <br /> Chromium 96.7 98.0 100.0 96.7 98.0 1.3 80-120 20 <br /> Cobalt 102 104 100.0 102.0 104.0 1.9 80-120 20 <br /> Copper 107 109 100.0 107.0 109.0 1.9 80-120 20 <br /> Lead 97.7 99.0 100.0 97.7 99.0 1.3 80-120 20 <br /> Molybdenum 97.0 98.5 100.0 97.0 98.5 1.5 80-120 20 <br /> Nickel 103 105 100.0 103.0 105.0 1.9 80-120 20 <br /> Selenium 91.0 93.2 100.0 91.0 93.2 2.4 80-120 20 <br /> Silver 105 106 100.0 105.0 106.0 0.9 80-120 20 <br /> Thallium 92.5 94.3 100.0 92.5 94.3 1.9 80-120 20 <br /> Vanadium 106 108 100.0 106.0 108.0 1.9 80-120 20 <br /> Zinc 95.2 96.2 100.0 95.2 96.2 1.0 80-120 20 <br /> Severn Trent Laboratories, Inc. 11/25/2003 13:54 <br /> STL San Francisco*1220 Quarry Lane,Pleasanton,CA 94566 <br /> A part of Severn Trent Plc Tel 925 484 1919 Fax 925 484 1096*www.stl-inc.com*CA DHS ELAP#2496 Page 28 of 36 <br />