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STLSubmission#: 2004-05-0855 <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience <br /> Attn.:Anju Fartan <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): 50308 Test(s): 8260FAB <br /> Laboratory Control Spike Water QC Batch#2004106/04-01.64 <br /> LCS 2004106104-01.64-005 Extracted: 06/04/2004 Analyzed: 06/04/2004 07:05 <br /> LCSD 2004106104-01.64-028 Extracted: 06/04/2004 Analyzed: 06/04/2004 07:28 <br /> Compound Conc. ug/L Exp.Conc. Recovery% RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Benzene 24.1 24.1 25.0 96,4 96.4 0.0 69-129 20 <br /> Toluene 26.5 25.9 25.0 106.0 103.6 2.3 70-130 20 <br /> Methyl tert-butyl ether(MTBE) 25.7 26.8 25.0 102.8 107.2 4.2 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dich[oroethane-d4 476 467 500 95.2 93.4 72-128 <br /> Toluene-d8 520 511 500 104.0 1022 1 80-113 <br /> Severn Trent Laboratories, Inc. 06!07!200413:05 <br /> STL San Francisco*1220 Quarry Lane,Pleasanton,CA 94566 <br /> A P-11-1 nevem Tient Plc Tel 925 484 1919 Fax 925 484 1096*www.stl-inc.com*CA[]HS ELAP#2496 Page 28 of 31 <br />