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Y <br /> Submission 2004-11-0824 <br /> IM t7M STL <br /> GasIBTEX Fuel oxygenates by 82608 <br /> TRC Alton Geoscience- Irvine <br /> Attn Anju Far€an <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone (949) 341-7440 Fax (949) 753-0111 <br /> Project 41050001 FA20 Received 11/29/2004 10 55 <br /> Conoco Phillips#11192 <br /> Site 1403 Country Club Blvd , Stockton <br /> Batch QC Report <br /> Prep(s) 5030E Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch#2004/12/06-IA 64 <br /> LCS 2004112106-1A 64-001 Extracted 12/06/2004 Analyzed 12/06/2004 07 01 <br /> LCSD <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Methyl tent-butyl ether(MTBE) 233 25 932 65-165 20 <br /> Benzene 223 25 892 69-129 20 <br /> Toluene 230 25 920 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 474 500 948 73-130 <br /> Toluene-d8 457 500 914 81-114 <br /> Severn Trent Laboratories, Inc 12/08/2004 18 40 <br /> STL San Francisco'1220 Quarry Lane Pleasanton CA 94566 <br /> A part of Severn Trern Pie Tel 925 484 1919 Fax 925 464 1096"www stl-inc eom•CA DHS FLAP#2496 Page 21 of 25 <br />