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I <br /> ®® STL Submission# 2004-02-0755 <br /> Gas/BTEX Feel Oxygenates by 8260B . <br /> TRC Alton Geosclence <br /> Attn Anlu Farlan <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 25 <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 #2004103105-2B 66 <br /> LCS 2004103105-2B 66-041 Extracted 03/05/2004 Analyzed 03/05/2004 17 41 <br /> LCSD 2004103105-213 66-005 Extracted 03/05/2004 Analyzed 03/05/2004 18 05 <br /> Compound Conc ug/L Exp Conc Recovery % RPD Ctri Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 223 226 25 892 904 1 3 65-165 20 <br /> Benzene 232 235 25 92 8 940 1 3 69-129 20 <br /> Toluene 21 5 22 7 25 86 0 908 54 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 532 519 500 1064 1038 76-114 <br /> Toluene-d8 1497 1516 1 500 994 1032 1 88-110 <br /> Severn Trent Laboratories, Inc 03108120041f 3-0 <br /> STL San Francisco*1220 Quarry Lane, Pleasanton,CA 94566 <br /> A part of Severn Trent PVc Tel 925 484 1919 Fax 925 484 1096*www stl-mc com*CA DHS FLAP#2496 Page 11 of 13 <br /> I <br />