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MCI <br />Gas/BTEX Fuel Oxygenates by 8260B <br />TRC Alton Geoscience- Irvine <br />Attn.: Anju Farfan <br />21 Technology Drive <br />Irvine—,CA-9271 8 <br />Phone: (949) 341-7440 Fax: (949) 753-0111 <br />Project: 41050001 FA20 <br />Conoco Phillips # 01205 <br />0. l.r <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 IL <br />Spk.Level Recovery % <br />Limits % <br />Flags <br />MS <br />MSD <br />Sample <br />U91 MS MSD <br />RPD <br />Rea <br />RPD <br />MS <br />MSD <br />Methyl tert-butyl ether <br />118 <br />115 <br />84.5 <br />25 134.0 122.0 <br />9A <br />65-165 <br />20 <br />J3 <br />=Benzene <br />:95:9= <br />:96:4= <br />=7.3.6= <br />=25— :89:2— :91-.2— <br />:2.2— <br />_69_129= <br />=20= <br />Toluene <br />24.1 <br />25.2 <br />1.21 <br />25 91,6 96.0 <br />4.7 <br />70-130 <br />20 <br />-Surrogates) <br />1,2-DichEoroetharse-d4 <br />420 <br />413 <br />500 84.0 82.6 <br />73-130 <br />Toluene -d8 - = <br />473 -_ - <br />494 <br />- 500 94:6= 98.8,- <br />-- _-= <br />81-114 - <br />Severn Trent Laboratories, Inc. <br />STL San Francisco" 1220 Quarry Lane, Pleasanton, CA 94566 <br />A pert of 5e"m Trenl Plc Tel 925 484 1919 Fax 9254841096"www.sti-ine.com' CA DHS ELAP# 2496 <br />0 <br />05/17/2005 16:07 <br />Page 37 of 42 <br />