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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 /> Matrix Spike ( MS/MSD ) Soil QC Batch #2003/11/20-02.13 <br /> GMX-3-1.0 >> MS Lab ID: 2003-11-0639 - 007 <br /> MS: 2003/11/20-02.13-004 Extracted: 11/20/2003 Analyzed: 11/25/200317:18 <br /> Dilution: 1.00 <br /> MSD: 2003/11/20-02.13-005 Extracted: 11/20/2003 Analyzed: 11/25/200317:49 <br /> Dilution: 1.00 <br /> Compound Conc. ug/Kg Spk.Level Recovery% Limits% Flags <br /> MS MSD Sample ug/Kg MS MSD RPD Rec. RPD MS MSD <br /> Aldrin 11.1 9.95 ND 16.7 66.5 60.3 9.8 37-136 35 <br /> Dieldrin 11.7 10.1 ND 16.7 70.1 61.2 13.6 58-135 35 <br /> Endrin 11.5 9.72 ND 16.7 68.9 58.9 15.6 58-134 35 <br /> Heptachlor 11.1 10.2 ND 16.7 66.5 61.8 7.3 40-136 35 <br /> 4,4'-DDT 11.4 10.1 ND 16.7 68.3 61.2 11.0 55-132 35 <br /> gamma-BHC(Lindane) 10.4 9.16 ND 16.7 62.3 55.5 11.5 37-137 35 <br /> Surrogate(s) <br /> 2,4,5,6-Tetrachloro-m-xylen 40.1 37.6 50 80.3 75.2 50-125 0 <br /> Decachlorobiphenyl 140.8 142.4 1 1 50 181.6 184.8 1 146-142 1 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 14 of 15 <br />