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STLSubmission#: 2003-11-0599 <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: 11/17/2003 17:15 <br /> Batch QC Report <br /> Prep(s): 3550/8081 Test(s):8081 <br /> Matrix Spike(MS/MSD) Soil QC Batch#2003/11/20-03.13 <br /> GMX-17-1.0 » MS Lab ID: 2003-11-0599-001 <br /> MS: 2003/11/20-03.13-004 Extracted: 11/20/2003 Analyzed: 11/22/2003 11:33 <br /> Dilution: 1.00 <br /> MSD: 2003/11/20-03.13-005 Extracted: 11/20/2003 Analyzed: 11/22/2003 12:05 <br /> Dilution: 1.00 <br /> Compound Conic. ug/Kg Spk.Level Recovery% Limits% Flags <br /> MS MSD Sample ug/Kg MS MSD RPD Rec. RPD MS MSD <br /> Aldrin 12.8 13.2 ND 16.7 76.6 79.0 3.1 37-136 35 <br /> Dieldrin 15.8 16.1 ND 16.7 94.6 96.4 1.9 58-135 35 <br /> Endrin 17.2 17.8 ND 16.7 103.0 106.6 3.4 58-134 35 <br /> Heptachlor 13.6 14.2 ND 16.7 81.4 85.0 4.3 40-136 35 <br /> 4,4'-DDT 53.4 54.5 40.6 16.7 76.6 83.2 8.3 55-132 35 <br /> gamma-BHC(Lindane) 13.1 13.5 ND 16.7 78.4 80.8 3.0 37-137 35 <br /> Surrogate(s) <br /> 2,4,5,6-Tetrachloro-m-xylen 48.1 48.7 50 96.1 97.4 50-125 0 <br /> Decachlorobiphenyl 37.9 37.6 50 1 75.7 1 75.2 46-142 0 <br /> Severn Trent Laboratories, Inc. 12/04/2003 12:15 <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 24 of 25 <br />