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i • � <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 DIPS EtBE TAME 1,2-DCA EDB Methanol <br /> Number Sampled (pglL) (pg/L) (pg1L) (pglL) W91) 4191L) WLy (pg1L) {pg1L) Comments <br /> VW-1 B 09/23/2004 <1,000 200 360 <10 <10 <10 18 <5 0 <200 <br /> 12/21/2004 <10,000 <2,000 2,000 <100 <100 <100 <50 <50 <250 <br /> 03/30/2005 <100 <20 15 <1 0 <1 0 <1 0 13 <0 50 0611312005 <100 <20 Is <0 50 <0 50 <0 50 3 2 <0 50 — <br /> VW-2A 03/11/2003 -- — -- — -- — -- — — Not Sampled <br /> 06/09/2003 — — -- -- — — — — Well Dry <br /> 09/17/2003 -- — — -- — — — — — Well Dry <br /> 12!1112003 — -- — -- — — — — 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 /> 106113120051 Insufriclent Water,Not Sampled <br /> VW-28 3/16/2001 — <200 573 <2 0 <20 <2 0 -- — — No FP,No S <br /> 6/29/2001 — <500* 780 <10* <10* <10* — — — No FP,No S <br /> 12/11/2001 -- 34 450 <2 0 <2 0 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 <2 5 <2 5 79 <2 5 -- No FP,No S <br /> 12/3/2002 — <200 98 <50 <5 0 <50 <50 — -- No FP,No S- <br /> 03/11/2003 <br /> 0311112003 <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 <5 0 41 -- - <br /> 03/10/2004 <100 <20 <0 50 <1 0 <1 0 <1 0 <0 50 — -- <br /> 06/17/2004 <500 <100 210 <50 <5 0 <5 0 34 — <100 <br /> 09/23/2004 <500 <100 79 <50 <5 0 <50 51 <25 <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 /> 0611312005 <100 <20 17 <0 50 <0 50 <0 50 091 <0 50 — <br /> VW-3A 103111r20031 — — — — — — — — — Not Sampled <br /> Report Date July 21,2005 Page 7 of 10 <br />