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TLSubmission: 2004-08-0759 ' <br /> Gas/BTEX Fuel Oxygenates by 8260B = <br /> i <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: 410500011FA20 Received: 08/27/2004 18:30 <br /> Conoco Phillips#11195 <br /> Site: 16500 South 1-5 Lathrop <br /> Batch QC Report € <br /> Prep(s): 50308 Test(s): 8260FAB € <br /> f <br /> Laboratory Control Spike Water QC Batch#2004109109-2A.64 <br /> LCS 2004109109-2A.64-033 Extracted: 09/09/2004 Analyzed: 091091200418:33 <br /> LCSD 2004109109-2A.64-055 Extracted: 09/09/2004 Analyzed: 09109/200418:55 <br /> Compound Conc. uglL Exp.Conc. Recovery% RPD Ctrl,Limits% Flags k <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Methyl tent-butyl ether(MTBE) 21.6 23.2 25 86.4 92.8 7,1 65-165 20 <br /> Benzene 23.0 24.3 25 92.0 97.2 5.5 69-129 20 <br /> Toluene 25.1 25.4 25 100.4 101.6 1.2 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichioroethane-d4 509 492 500 101.8 98.4 72-128 <br /> Toluene-d8 544 518 500 108.8 903.6 80-113 <br /> t <br /> t <br /> k <br /> l Y <br /> J <br /> Severn Trent Laboratories, Inc. 09/10/200416:56 <br /> STL San Francisco*1220 Quarry Lane,Pleasanton,CA 94566 <br /> Apars of 3—m Trent Plc Tel 925 484 1919 Fax 925 484 1096'www.stl-inc.com*CA DHS ELAP#2496 Page 27 of 28 i; <br />