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t <br /> STLSubmission M 2004-05-0855 <br /> Gas/BTEX Fuel Oxygenates by 8260B t <br /> TRC Alton Geoscience <br /> Attn.: Anju Farfan <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone: (949) 341-7440 Fax: (949) 753-0111 <br /> Project: 41050001 FA20 Received: 05/24/2004 11:50 <br /> Conoco Phillips# 11195 <br /> Site: 16500 South Interstate 5 Lathrop <br /> Batch QC Report <br /> Prep(s): 5030E Test(s): 8260FAB <br /> Laboratory Control Spike Water QC Batch#20041`06103-1A.66 <br /> LCS 2004106103-1A.66-001 Extracted: 06/03/2004 Analyzed: 06/03/2004 07:01 <br /> LCSD 2004106103-1A.66-025 Extracted: 06/03/2004 Analyzed: 06/03/2004 07:25 <br /> Compound Conc. ug/L Exp.Conc. Recovery% RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. I RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 25.7 25.5 25 102.8 102.0 0.8 65-165 20 <br /> Benzene 26.4 27.1 25 105.6 108.4 2.6 69-129 20 <br /> Toluene 27.1 26.5 25 108.4 106.0 2.2 70-130 20 `: =r <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 458 459 500 91.6 91.8 72-128 <br /> Toluene-d8 536 518 500 107.2 103.6 80-113 <br /> Severn Trent Laboratories, Inc. 06/071200413:06 <br /> STL San Francisco"1220 Quarry Lane,Pleasanton,CA 94566 <br /> Apan of Severn Trentptc Tel 925 484 1919 Fax 925 484 1096*www.sll-inc.com'CA DNS ELAP#2496 Page 27 of 31 <br />