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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 EtBE TAME 1,2-DCA EDB Methanol <br /> Number Sampled (ug/L) (pg/L) (pg1L) (NgIL) (99/L) (pg/L) (pgll-) (P9/L) (P91L) Comments <br /> VW-2B 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 <1,000 <200 90 <10 <10 <10 55 — <br /> 12/11/2003 <500 <100 170 <50 <5 0 <50 41 — — <br /> 03/10/2QQ4 <100 <20 <0 50 <1 0 <1 0 <1 0 <0 50 -- <br /> 06/17/2004 <500 <100 210 <50 <50 <50 34 -- <100 <br /> 09/23/2004 <500 <100 79 <50 <50 <50 51 <2 5 <100 <br /> 12/21/2004 <21500 1 630 460 <25 <25 <25 21 <12 1 <100 J. <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 /> VW-313 11/20/1997 — <100 <2 0 <2 0 <20 <20 -- - — 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 <20 <20 — - — No FP,No S <br /> 9/21/1998 — 310 235 <2 0 <2 0 <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 /> 6/11/1999 — <200 548 <2 0 <2 0 <2 0 — -- — No FP,No S <br /> 9/10/1999 -- <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 /> 12/11/2401 <20 200 <2 0 <2 0 <2 0 — -- No FP,No S <br /> 3/14/2002 — <5 Q 26 <0 50 <0 50 1 <0 50 — No FP,No S <br /> Report Date January 18,2005 Page 7 of 9 <br />