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Table 2 <br /> Fuel Oxygenates Analytical Data <br /> ARCO Service Station No 2186 <br /> 3212 N California, Stockton, CA <br /> Well Date Ethanol TBA MtBE DIPE EtBE TAME 1,2-DCA EDB PGE Methanol <br /> Number Sampled WL) (pg/L) WgIL) (pg/L) (pglL) (pgll-) (ug/L) (pglL) (Erg/L) (pg1L) Comments <br /> VW-3A 09/17/2003 -- -- -- — -- — — — — Well Dry <br /> 12/11/2003 -- — — — — -- -- — — — Not Sampled <br /> 03110/2004 -- -- -- — — -- — -- -- Not Sampled <br /> VW-313 11124/1997 -- <100 <2 0 <2 0 <2 0 <2 0 -- — - — No FP,No S <br /> 2/17/1998 -- NA NA NA NA NA — — — — No FP,No S <br /> 6/24/1998 - <200 <2 0 <2 0 <2 0 <2 0 -- -- — -- No FP,No S <br /> 9/21/1998 — 310 235 <2 0 <20 <2 0 — — — — No FP No S <br /> 12/14/1998 - <200 432 <2 0 <2 0 511 -- - -- -- No FP,No S <br /> 3/31/1999 <200 <2 0 <2 0 <2 0 <2 0 -- -- -- -- No FP,No S <br /> 6/1 i/1999 — <200 548 <2 0 <2 0 <2 0 -- -- -- No FP, No S <br /> 9110/1999 <1,000 1,500 <10 <10 123 -- -- -- -- No FP,No S <br /> 12/3/1999 - <200 262 <2 0 <2 0 208 -- -- -- -- No FP,No S <br /> 4/3/2000 - <200 252 <2 0 <2 0 <2 0 — — — — No FP No S <br /> 6/22/2000 -- <200 3,180 <2 0 <2 0 23 -- — — — No FP,No S <br /> 9/27/2000 -- NS NS NS NS NS - - - -- No FP,No S <br /> 12/20/2000 -- <200 592 <2 0 <2 0 <2 0 - — — — No FP No S <br /> 3/16/2001 — <200 912 <2 0 <2 0 <2 0 — -- — -- No FP,No S <br /> 6/21/2001 — <3,800` 5,000 <77' <77' <77' -- — -- — No FP,No S <br /> 12/11/2001 — <20 200 <2 0 <20 <2 0 — — — — No FP No S <br /> 3/14/2002 — <50 26 <0 50 <0 50 <0 50 -- - -- -- No FP,No S <br /> 6/19/2002 -- 21 1,500 <0 50 063 7 28 -- -- — No FP,No S <br /> 9/12/2002 <200 <25 140 <2 5 <2 5 <2 5 29 <2 5 - — No FP,No S <br /> 12/3/2002 — <200 69 <5 0 <5 0 <5 0 61 -- -- - No FP,No S <br /> 03/11/2003 <500 <100 370 <2 5 <2 5 <2 5 39 -- — -- <br /> 06/09/2003 <20,000 <4 000 6 900 <200 1 <200 <200 <100 -- -- -- <br /> 09/17/2003 <1,000 <200 210 <10 <10 <10 23 — — — <br /> 12/11/2003 <10,000 <2,000 3 500 <100 <100 <100 <50 -- --103/1012004 <2,000 <400 240 J <20 <20 1 <20 <10 I -- — -- <br /> TBA=Tert-butyl alcohol <br /> DIPS=Di-isopropyl ether <br /> ELBE=Ethyl tert-butyl ether <br /> MtBE=Methyl tert-butyl ether <br /> TAME=Tert-amyl methyl ether <br /> 1,2-DCA=1,2-Dichloroelhane <br /> EDB=1,2-Dibromoethane <br /> Report Date May 5,2004 Page 6 of 7 <br />