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Oil!S L n <br /> ®® Submission 2004-11-0843 <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience- Irvine <br /> Attn Anju Farl'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 18 20 <br /> Conoco Phillips#08671 <br /> Site 8606 Thornton Road, Stockton <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch#2004/12/06-1C 64 <br /> LCS 2004/12/06-IC 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 tert-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 94 8 73-130 <br /> Toluene-d8 457 500 914 81-114 <br /> Severn Trent Laboratories, Inc 12110/2004 17 2110 <br /> STL San Francisco'1220 Quarry Lane Pleasanton,CA 94566 <br /> A part of Se—Fn Trent Pk Tel 925 484 1919 Fax 925 484 1096 1 www sli-inc com'CA DHS ELAP*2496 Page 19 of 24 <br />