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s s a <br /> Table 2 <br /> Fuel Oxygenates Analytical Data <br /> ARCO Service Station No 2186 <br /> 3212 N California Street, Stockton, CA <br /> Well Date Ethanol TBA MtBE DIPE ELBE TAME 1,2-DCA EDB Methanol <br /> Number Sampled (pg/L) (pg/L) (pglL) (pg1L) (pg/L) (pg/L) (pg/L) (pg1L) (pglL) Comments <br /> VW-2A 09/23/2004 -- — — — — — — — — Not Sampled,Well Dry <br /> 12/21/2004 — — — - -- -- - — Insufficient Water,Not Sampled <br /> 03/30/2005 — -- — -- -- — <br /> j VW-2B 3/16/2001 — <200 573 <2 0 <20 <2 0 — — -- No FP,No S <br /> 6/21/2001 — <500* 780 <10* <10* <10* — — — No FP,No S <br /> 12/11/2001 — 34 450 <2 0 <20 25 -- -- — No FP,No S <br /> 3/14/2002 20 320 <0 50 <0 50 25 — -- -- No FP,No S <br /> 6/19/2002 — <100 370 <10 <10 <10 <10 — — No FP,No S <br /> 9/12/2002 <200 25 210 <2 5 <25 <2 5 79 <2 5 -- No FP,No S <br /> 12/3/2002 — <200 98 <5 0 <50 <50 <5 0 -- -- No FP,No S <br /> 03/11/2003 <2 000 <400 530 <10 <10 <10 <10 - — <br /> 06/09/2003 <2 000 <400 810 <20 <20 <20 <10 -- -- <br /> 09/17/2003 51,000 <200 90 <10 <10 <10 55 — — <br /> 12/11/2003 <500 <100 170 <5 0 <50 <50 41 —03110/2004 <100 <20 <0 50 <1 0 <1 0 <1 0 <0 50 - -- <br /> 06/17/2004 <500 <100 210 <50 <5 0 <50 34 — <100 <br /> 09/23/2004 <500 <100 79 <50 <5 0 <50 51 <2 5 <100 <br /> 12/21/2004 <2,500 630 460 <25 <25 <25 21 <12 <100 <br /> 03/30/2005 <200 <40 43 <2 0 <2 0 <2 0 <1 0 <1 0 -- <br /> VW-3A 03/11/2003 — -- -- -- — — — — — Not Sampled <br /> 06/09/2003 — — -- -- -- — — -- — Well Dry <br /> 09/17/2003 -- -- - - -- - -- -- — Well Dry <br /> 12/11/2003 -- — _ __ _ — _ -- — Not Sampled <br /> 03/10/2004 -- — — -- -- — - — -- Not Sampled <br /> 06/17/2004 -- -- -- — -- -- -- -- -- Not Sampled,Well Dry <br /> 09/23/2004 — — — — — — — — -- Not Sampled,Well Dry <br /> 12/21/2004 -- -- -- -- -- -- -- -- -- Insufficient Water,Not Sampled <br /> 03/30/2005 -- -- -- -- -- -- — — -- <br /> VW-3B 11/20/1997 — <100 <2 0 <2 0 <20 <2 0 -- - -- No FP,No S <br /> 2/17/1998 -- NA NA NA NA NA — — No FP,No S <br /> 6/24/1998 — <200 <20 <2 0 <20 <2 0 -- - — No FP,No S <br /> 9/21/1998 — 310 235 <2 0 <20 <2 0 — — — No FP,No S <br /> Report Date April 25,2005 Page 7 of 9 <br />