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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 />0 W <br />Submission: 2005-04-0864 <br />Received: 04/27/2005 16:10 <br />Site: 16470 Cambridge Street Lathrop <br />• <br />Severn Treat Laboratories, Inc. <br />STL San Francisco * 1220 Quarry Lane, Pleasanton, CA 94566 <br />A pert of Severn T—t PIc Tel 925 484 1919 Fax 925 484 1096 * www.stl-inc.com * CA DHS ELAP4 2496 <br />05/17/2005 16:07 <br />Page 17 of 42 <br />Compound <br />Conc. <br />RL <br />Unit Dilution Analyzed Flag <br />GRO (C6 -C12) <br />2100 <br />50 <br />ug/L 1.00 05/11/2005 16:32 <br />Benzene <br />14 <br />0.50 <br />ug/L i .00 051-1 'i 12005 16:32 <br />Toluene <br />39 <br />0.50 <br />ug/L 1.00 051111200516:32 <br />Ethylbenzene <br />170 <br />0.50 <br />ug/L 1.00 051111200516:32 <br />Total xylenes <br />560 <br />2.0 <br />ug/L 2.00 05/11/2005 22:32 <br />:cert -Butyl alcohol -(.TBA) <br />:ND <br />5.0 <br />ug&L 1.Q -Q_05/11/2005 -16:3Z <br />Methyl tert-butyl ether (MTBE) <br />ND <br />0.50 <br />ug/L 1.00 05/11/2005 16:32 <br />Zi-isopropyl=Ether=(DIPS) <br />=ND <br />0:50 <br />ug/L— 1.00= ,05/1.112005 16:32- <br />Ethyl tert-butyl ether (ETBE) <br />ND <br />0.50 <br />ug/L 1.00 05/11/2005 16:32 <br />- <br />tert-Amyl methyl ether (TAME) "- ' " <br />-ND – <br />0:50' - <br />ug/L- - 1:00 05/11/200516:32 <br />1,2 -DCA <br />ND <br />0.50 <br />ug/L 1.00 05/11/200516:32 <br />EDB <br />ND <br />0.50 <br />ug/L 1.00 05/11/200516:32 <br />Ethanol <br />ND <br />50 <br />ug/L 1.00 05/111200516:32 <br />Surrogate(s) <br />1,2-Dichioroethane-d4 <br />91.3 <br />73-130 <br />% 2.00 05/11/2005 22:32 <br />1,2-Dichloroethane-d4 <br />100.9 <br />73-130 <br />% 1.00 05/11/200516:32 <br />Toluene -d8 <br />94.1 <br />81-114 <br />% 2.00 05/11/2005 22:32 <br />Toluene -d8 <br />94.6 <br />81-114 <br />% 1.00 051111200516:32 <br />Severn Treat Laboratories, Inc. <br />STL San Francisco * 1220 Quarry Lane, Pleasanton, CA 94566 <br />A pert of Severn T—t PIc Tel 925 484 1919 Fax 925 484 1096 * www.stl-inc.com * CA DHS ELAP4 2496 <br />05/17/2005 16:07 <br />Page 17 of 42 <br />