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Int � <br /> TLSubmission: 2005-07-0597 <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience- Irvine <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: 07/21/2005 14:20 <br /> Conoco Phillips #01205 <br /> Site: 16470 Cambridge Dr. Lathrop <br /> 'Batch:QC.Report <br /> Preps) 50308 Y <br /> n <br /> _ Test(s) 826pB <br /> Laboratory Control Spike Water 1QC Batch#2005108102-1A.651 <br /> LCS 2005108/02 1A 65-051- act6d <br /> 08/02/2005 Analyzed: 08/02/2005 07:54 <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) 23°1 25 92.4 65-165 20 <br /> Benzene 25.0 25 100.0 69-129 20 <br /> Toluene 25.7 25 102.8 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 517 500 103.4 73-130 <br /> Toluene-d8 1490 1 500 98.0 81-114 <br /> Severn Trent Laboratories, Inc. 08/03/2005 14:42 <br /> STL San Francisco-1220 Quarry Lane, Pleasanton,CA 94566 <br /> A pan ersevem hem Pk Tel 925 484 1919 Fax 925 484 1 096 www.stl-inc.com*CA QHS ELAP#2496 Page 28 of 33 <br />