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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 DIPE EtBE TAME 1,2-DCA EDB Methanol <br /> Number Sampled (pg/L) (pg/L) (ig/L) (pg/L) (pg/L) (pg1L) (pg/L) WL) WglL) Comments <br /> VW-3B 12/14/1998 - <200 432 <20 <2 0 511 -- - -- No FP,No S <br /> 3/31/1999 - <200 <2 0 <20 <2 0 <20 -- -- - No FP,No S <br /> 6/11/1999 - <200 548 <20 <2 0 <20 -- - - 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 /> 6/2212000 - <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 <2 0 <2 0 - - No FP,No S <br /> 3/14/2002 -- <5 0 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 <25 <2 5 29 <25 - No FP,No S <br /> 12/3/2002 - <200 69 <5 0 <50 <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 <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 - <br /> 03110/2004 <2,000 <400 240 J <20 <20 <20 <10 -06117/2004 <500 <100 180 <5 0 <5 0 <5 0 15 - <100 <br /> 09/23/2004 <100 23 45 <1 0 <1 0 <1 0 85 <0 50 <100 <br /> 12/21/2004 <2,500 <500 250 <25 <25 <25 <12 <12 <150 <br /> 03/30/2005 <100 <20 32 <1 4 <1 0 <1 0 077 <0 50 -- <br /> VW-4 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 /> �7 <br /> Report Date April 25,2005 Page 8 of 9 <br />