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STL <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 />Phone: (949) 341-7440 Fax: (949) 753-0111 <br />Project: 41050001 FA20 <br />Conoco Phillips # 01205 <br />11 to <br />Submission: 2005-04-0864 <br />0 <br />Received: 04/27/2005 16;10 <br />Site: 16470 Cambridge Street Lathrop <br />Severn Trent Laboratories, Inc. <br />STL San Francisco* 1220 Quarry Lane, Pleasanton, CA 94566 <br />APS of sever TM.t Pm Tel 925 484 1919 Fax 925 484 1096 * www.sti-inc.com * CA DHS ELAP# 2496 <br />0 <br />05/17/2005 16:07 <br />Page 29 of 42 <br />Cmmnncmd <br />I Conc. ug/L I Exp.Conc.1 <br />Recovery % JRPDJ Ctri.Limits % Flags <br />LCS <br />LCSD <br />LCS <br />LCSD % Rec. <br />RPD LCS <br />LCSD <br />Benzene <br />41.7 <br />50 <br />83.4 <br />69-129 <br />20 <br />Toluene <br />45.3 <br />50 <br />gu.a <br />70-1.;:. <br />2v <br />Methyl tart -butyl ether (MTBE) <br />44.3 <br />50 <br />88.6 <br />65-165 <br />20 <br />Surrogates(s) <br />1,2-Dichloroethane-d4 <br />375 <br />500 <br />75.0 <br />73-130 <br />Toluene -d8 <br />460 <br />500 <br />92.0 <br />81-114 <br />Severn Trent Laboratories, Inc. <br />STL San Francisco* 1220 Quarry Lane, Pleasanton, CA 94566 <br />APS of sever TM.t Pm Tel 925 484 1919 Fax 925 484 1096 * www.sti-inc.com * CA DHS ELAP# 2496 <br />0 <br />05/17/2005 16:07 <br />Page 29 of 42 <br />