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TRC Alton Geoscience- Irvine <br />Attn.: Anju Farfan <br />Gas/BTEX Fuel Oxygenates by 8260B <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 />Received: 04/27/2005 16:10 <br />Site: 16470 Cambridge Street Lathrop <br />Compound <br />Conc. <br />RL <br />Unit <br />Dilution <br />Analyzed <br />Flag <br />GRO (C6 -C12) <br />74 <br />50 <br />ug/L <br />1.00 <br />05/11/2005 16:06 <br />Benzene <br />ND <br />0.50 <br />ug/L <br />1.00 <br />05/111200516:06 <br />Toluene <br />ND <br />0.50 <br />ug/L <br />1.00 <br />051111200516:06 <br />Ethylbenzene <br />3.7 <br />0.50 <br />ug/L <br />1.00 <br />051111200516:06 <br />Total xylenes <br />9.5 <br />1.0 <br />ug/L <br />1.00 <br />05/11/2005 16:06 <br />tert-Butyl alcohol (TBA) <br />ND <br />5.0 <br />ug/L <br />1.00 <br />05/11/2005 16:06 <br />Methyl tert-butyl ether (MTBE) <br />52 <br />0.50 <br />ug/L <br />1.00 <br />05/11/2005 16:06 <br />Di -isopropyl Ether (DIPS) <br />ND <br />0.50 <br />ug/L <br />1A0 <br />05/11/2005 16:06 <br />Ethyl tert-butyl ether (ETBE) <br />ND <br />0.50 <br />ug/L <br />1.00 <br />05/11/2005 16:06 <br />tert-Amyl methyl ether (TAME) <br />ND <br />0.50 <br />ug/L <br />1.00 <br />05/11/2005 16:06 <br />1,2 -DCA <br />ND <br />0.50 <br />ug/L <br />1.00 <br />05/111200516:06 <br />EDB <br />ND <br />0.50 <br />ug/L <br />1.00 <br />05/11/200516:06 <br />Ethanol <br />ND <br />50 <br />ug/L <br />1.00 <br />05/11/200516:06 <br />surrogate(s) <br />1,2-Dichloroethane-d4 <br />102.9 <br />73-130 <br />% <br />1.00 <br />05/11/200516:06 <br />Toluene -d8 <br />99.6 <br />81-114 <br />% <br />1.00 <br />051111200516:06 <br />A pert of Severn hent Plc <br />Severn Trent Laboratories, Inc. <br />STL San Francisco * 1220 Quarry Lane, Pleasanton, CA 94566 <br />Tel 925 484 1919 Fax 925 484 1096 * www.stl-inc.com * CA OHS ELAP# 2496 <br />05/17/2005 16:07 <br />Page 16 of 42 <br />