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• <br />• <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 />Picone: (949) 341-7440 Fax: (949) 753-0111 <br />Project: 41050001 FA20 <br />Conoco Phillips # 01205 <br />Submission: 2005-04-0864 <br />Received: 04/27/2005 16:10 <br />Site: 16470 Cambridge Street Lathrop <br />Compound <br />Conc. u /L Spk.Level Recove % <br />Limits % <br />Fla s <br />M5 <br />MSD Sample u /L MS MSD <br />RPD <br />Rec. <br />RPD <br />MS I MSD <br />Methyl tart -butyl ether <br />36.1 <br />33.6 11.5 25 98.4 88.4 <br />10.7 <br />65-155 <br />20 <br />Benzene <br />25.3 <br />25.2 NO 25 101.2 100.8 <br />0.4 <br />69-129 <br />20 <br />Toluene <br />25.3 <br />24.1 NO 25 101.2 96.4 <br />4.9 <br />70-130 <br />20 <br />Surrogate(s) <br />1,2-Dichloroethane-d4 <br />404 <br />404 500 80.8 80.8 <br />73-130 <br />Toluene d8 <br />486 <br />474 500 97.2 94.8 <br />1 181-114 <br />Severn Trent Laboratories, Inc. <br />STL San Francisco * 1220 Quarry Lane, Pleasanton, CA 94566 <br />npnorsem.Tm,„ Mt Tel 925 484 1919 Fax 925 484 1096 * www.sti-inc.com * CA DHS ELAP# 2496 <br />05/17/2005 16:07 <br />Page 40 of 42 <br />