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STLSubmission #: 2003-11-0639 <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: 11/18/2003 17:50 <br /> Tracy Gravel Pits <br /> Site: 26805 South MacArthur Dr,Tracy,CA,9557E <br /> Batch QC Report <br /> Prep(s): 6020 Test(s): 6020 <br /> Matrix Spike ( MS/MSD ) Soil QC Batch #2003/11/19-10.15 <br /> GMX-20-1.0 >> MS Lab ID: 2003-11-0639-001 <br /> MS: 2003/11/19-10.15-004 Extracted: 11/19/2003 Analyzed: 12/02/2003 20:05 <br /> Dilution: 1.00 <br /> MSD: 2003/11/19-10.15-005 Extracted: 11/19/2003 Analyzed: 12/01/2003 20:09 <br /> Dilution: 1.00 <br /> Compound Conc. mg/Kg Spk.Level Recovery% Limits% Flags <br /> MS MSD Sample mg/Kg MS MSD RPD Rec. RPD MS MSD <br /> Antimony 7.20 8.70 ND 100 7.2 8.7 156. 75-125 20 mso mso <br /> Arsenic 84.0 84.0 3.34 100 80.7 80.7 0.0 75-125 20 <br /> Barium 242 248 151 100 91.0 97.0 6.4 75-125 20 <br /> Beryllium 95.0 95.0 0.634 100 94.4 94.4 0.0 75-125 20 <br /> Cadmium 85.0 86.0 ND 100 85.0 86.0 1.2 75-125 20 <br /> Chromium 118 118 27.6 100 90.4 90.4 0.0 75-125 20 <br /> Cobalt 98.0 98.0 9.19 100 88.8 88.8 0.0 75-125 20 <br /> Copper 113 114 30.3 100 82.7 83.7 1.2 75-125 20 <br /> Lead 90.0 89.0 6.77 100 83.2 82.2 1.2 75-125 20 <br /> Molybdenum 62.0 60.0 ND 100 62.0 60.0 3.3 75-125 20 mso mso <br /> Nickel 120 121 33.2 100 86.8 87.8 1.1 75-125 20 <br /> Selenium 79.0 78.0 ND 100 79.0 78.0 1.3 75-125 20 <br /> Silver 83.0 83.0 ND 100 83.0 83.0 0.0 75-125 20 <br /> Thallium 83.0 83.0 ND 100 83.0 83.0 0.0 75-125 20 <br /> Vanadium 117 114 29.0 100 88.0 85.0 3.5 75-125 20 <br /> Zinc 123 122 40.2 100 82.8 81.8 1.2 75-125 20 <br /> Severn Trent Laboratories, Inc. 12/10/200316:55 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> A Part of Severn Trent Pc Tel 925 484 1919 Fax 925 484 1096'www.stl-inc.com`CA DHS ELAP#2496 Page 27 of 28 <br />