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STLSubmission #: 2003-11-0639 <br /> Organochlorine Pesticides Analysis <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): 3550/8081 Test(s): 8081 <br /> Laboratory Control Spike Soil QC Batch #2003/11/20-02.13 <br /> LCS 2003/11/20-02.13-002 Extracted: 11/20/2003 Analyzed: 11/25/200316:16 <br /> LCSD 2003/11/20-02.13-003 Extracted: 11/20/2003 Analyzed: 11/26/200316:47 <br /> Compound Conc. ug/Kg Exp.Conc. Recovery% RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Aldrin 10.3 11.8 16.5 62.4 71.1 13.0 37-136 35 <br /> Dieldrin 10.8 11.8 16.5 65.5 71.1 8.2 58-135 35 <br /> Endrin 9.32 10.3 16.5 56.5 62.0 9.3 58-134 35 or <br /> Heptachlor 9.84 12.0 16.5 59.6 72.3 19.3 40-136 35 <br /> 4,4'-DDT 9.97 12.0 16.5 60.4 72.3 17.9 55-132 35 <br /> gamma-BHC(Lindane) 9.51 10.3 16.5 57.6 62.0 7.4 37-137 35 <br /> Surrogates(s) <br /> 2,4,5,6-Tetrachloro-m-xylene 39.2 40.8 50 78.4 81.5 50-125 0 <br /> Decachlorobiphenyl 40.2 43.1 50 80.4 86.1 46-142 0 <br /> Severn Trent Laboratories, Inc. 12/09/2003 08:59 <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 13 of 15 <br />