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MMIIMM� STL <br /> Submission# 2004-02-0733 <br /> Gas/BTEX Fuel Oxygenates by 8260B • <br /> TRC Alton Geoscience <br /> Attn Antu FarFan <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone (949) 341-7440 Fax (949) 753-0111 <br /> Project 41050001 FA20 Received 02/24/2004 16 50 <br /> Conoco Phillips#11192 <br /> Site 1403 Country Club Blvd <br /> Batch QC Report . ._„ <br /> Prep(s) 5030B Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch#2004/03103-2113 64 <br /> LCS 2004103103-26 64-020 Extracted 03/03/2004 Analyzed 03/03/2004 17 20 <br /> LCSD 2004103103-213 64-042 Extracted 03/0312004 Analyzed 03/03/2004 17 42 <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 241 214 25 964 856 11 9 65-165 20 <br /> Benzene 23 5 22 8 25 940 912 3 0 69-129 20 • <br /> Toluene 258 246 25 1032 984 4 8 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 400 395 500 800 790 76-114 <br /> Toluene-d8 492 489 500 1984 11978 88-110 <br /> Severn Trent Laboratories, Inc 03/08/2004 13 460 <br /> STL San Francisco*1220 Quarry Lane,Pleasanton CA 94566 <br /> A part of Severn Trent Pe Tel 925 484 1919 Fax 925 484 1 096*www stl-inc corn*CA DMS FLAP#2496 Page 13 of 15 <br />