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e STL <br /> Submission#: 2003-11-0887 <br /> ='=- Gas/BTEX Fuel Oxygenates by 8260B <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: 11/25/2003 15:00 <br /> Conoco Phillips#11195 <br /> Site: 16500 South Interstate 5, Lathrop <br /> Batch QC:Report <br /> Prep(s): 50306 Test(s): 82606 <br /> LaboratoryControl Spike. Water QC Batch#2003/12105-1:A.64 <br /> CCS 2003112105-1A.64-041 Extracted: 12/05/2003 Analyzed: 12/05/2003 09:41 <br /> LGSD 2003112105-1A.64-004 Extracted: 12/05/2003 Analyzed: 12/05/200310:04 <br /> Compound Conc. ug/L Exp.Conc. Recovery% RPD Ctrl.Limits% Flags <br /> LGS LCSD LGS LCSD % Rec. RPD LGS LCSD <br /> Methyl ted-butyl ether(MTBE) 21.2 21.0 25 84.8 84.0 0.9 65-165 20 <br /> Benzene 20.6 21.8 25 82.4 87.2 5.7 69-129 20 <br /> Toluene 21.7 22.4 25 86.8 89.6 3.2 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichioroethane-d4 470 476 500 94.0 95.2 76-114 <br /> Toluene-d8 454 465 500 90.8 93.0 88-110 <br /> Severn Trent Laboratories, Inc. 12/11/2003 17:29 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> Apart of Sa am Trani Plc Tel 925 484 1919 Fax 925 484 1096'www.stl-inc.com'CA DHS ELAP*2496 Page 27 of 30 <br />