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TSubmissionSL #: 2003-11-0887 <br /> . <br /> F. ' a Gas1BTEX Fuel Oxygenates by 8260B <br /> TFCC 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): 5030B Test(s): 8260B <br /> Laboratory Control Spike Water QC Batch#2003112103-01.68 <br /> LCS 2003112103-01.68-036 Extracted: 1210.312003 Analyzed: 12703/200314:36 <br /> LCSD 2003/12/03-01:68-054 Extracted: 12103/2003 Analyzed: 12/03/200314:54 <br /> Compound Conc. ug/L Exp.Conc.1 Recovery% RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Benzene 19.5 21.2 25.0 78.0 84.8 8.4 69-129 20 <br /> Er Toluene 20.2 21.4 25.0 80.8 85.6 5.8 70-130 20 <br /> _./ Methyl Cert-butyl ether(MTBE) 20.8 22.6 25.0 83.2 90.4 8.3 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 453 474 500 90.6 94.8 76-114 <br /> Toluene-d8 457 455 500 91.4 91,0 88-110 <br /> Severn Trent Laboratories, Inc. 12111/200317:29 <br /> STL San Francisco'1220 Quarry Lane, Pleasanton,CA 94566 <br /> A pap of Severn Trent Plc Tei 925 484 1919 Fax 925 484 1096'www.stl-inc.com*CA DHS ELAP#2496 Page 25 of 30 <br />