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S'I'L <br />Gas/BTEX Fuel Oxygenates by 82608 <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: 41050001 FA20 <br />Conoco Phillips # 01205 <br />Submission: 2005-04-0864 <br />0 <br />Received: 04/27/2005 16:10 <br />Site: 16470 Cambridge Street Lathrop <br />Compound <br />Conc. u 1L <br />Spk.Level <br />Reoove % Limits % <br />Flags <br />MS <br />MSD <br />Sample <br />u IL <br />MS MSD RPD Rec. RPD <br />MS <br />MSD <br />Methyl_tert-butyl ether <br />4Benzene - <br />30,2_ <br />_28.8_ <br />_ND <br />_25� <br />120.8 115.2 4.7 65-165 20 <br />23.9 <br />22.3 <br />NO <br />25 <br />95.6 89.2 6.9 69-129 20 <br />Toluene <br />30.6 <br />29.0 <br />NO <br />25 <br />122.4 116.0 5.4 70-130 20 <br />Surrogate(s) <br />1,2-Dichloroethane-d4 <br />.438 <br />453- _ <br />-- <br />500 - <br />87.7_ 90.6 _ _ _ _ 73-130 _ <br />Toluene -d8 <br />482 <br />508 <br />500 <br />96.3 101.6 81-114 <br />Severn Trent Laboratories, Inc. <br />STL San Francisco' 1220 Quarry Lane, Pleasanton, CA 94566 <br />A pert t8e— Trent Plc Tel 925 484 1919 Fax 925 484 1096 " www.sti-ine.com ' CA DHS ELAP# 2496 <br />.I <br />05117/2006 1&07 <br />Page 35 of 42 <br />