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ti <br /> ST L Submission#: 2004-05-0855 <br /> GasBTEX 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: 05/24/2004 11:50 <br /> Conoco Phillips# 11195 <br /> Site: 16500 South Interstate 5 Lathrop <br /> Batch QC Report <br /> Prep(s): 5030B Test(s): 8260FAB <br /> Laboratory Control Spike Water QC Batch#2004106104-01.64 <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 Cone. ug/L Exp.Conc. Recovery% RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. I RPD LCS LCSD <br /> Benzene 24.1 24.1 25.0 96.4 96.4 0.0 69-129 20 <br /> = ai Toluene 26.5 25.9 25.0 106.0 103,6 2.3 70-130 20 <br /> Methyl Cert-butyl ether(MTBE) 25.7 26.8 25.0 102.8 107,2 4.2 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 476 467 500 95.2 93.4 72-128 <br /> Toluene-d8 520 511 500 1104.0 1102.2 1 1 80-113 <br /> Severn Trent Laboratories, Inc. 061071200413:05 <br /> STL San Francisco`1220 Quarry Lane,Pleasanton,CA 94566 <br /> A pal of Se ern Trent Pic Tel 925 484 1919 Fax 925 484 1096'www.stl-lnc.com'CA DHS ELAP#2496 Page 28 of 31 <br />