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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 ELBE TAME 1,2-DCA EDB Methanol
<br /> Number Sampled (pg1L) (,vglL) (pglL) (pgll-) (pg1L) (ug1L) (9911L) (pg1L) (pg1L) Comments
<br /> MW-1 11/20/1997 -- <100 78 <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 39 <2 0 <2 0 <2 0 — -- -- No FP,No S
<br /> 9/21/1998 — <2000 138 <2 0 <2 0 <2 0 - — - No FP No S
<br /> 12/14/1998 -- <200 228 <2 0 <2 0 <2 0 -- -- -- No FP,No S
<br /> 12/14/1998 <200 314 <2 0 <2 0 <2 0 — - - [D],No FP, No S
<br /> 3/31/1999 -- <200 392 <2 0 <2 0 <2 0 -- -- No FP, No S
<br /> 6/11/1999 — <200 628 <2 0 <2 0 <2 0 — — No FP,No S
<br /> 9/10/1999 - <400 800 <4 0 <4 0 812 -- -- No FP,No S
<br /> 12/3/1999 — <400 984 <4 0 <4 0 892 — — No FP,No S
<br /> 4/3/2000 -- <200 281 <2 0 <2 0 246 -- -- -- No FP,No S
<br /> 6/22/2000 -- <200 114 <2 0 <2 0 <2 0 - -- -- No FP No S
<br /> 9/27/2000 — 355 4,500 <2 0 <2 0 338 — - No FP, No S
<br /> 12/20/2000 — <200 1,870[1] <2 0 <2 0 175 — - No FP, No S
<br /> 3/16/2001 - <200 2,190[1] <2 0 <2 0 246 -- - — No FP,No S
<br /> 6/21/2001 -- <14,000 28,000 <290* <290* <290* -- -- - No FP No S
<br /> 9/13/2001 — <2,500 4 500 <50 <50 <50 - - — No FP, No S
<br /> 12/11/2001 — 1 100 8 800 <2 0 <2 0 72 -- - -- No FP,No S
<br /> 3/14/2002 — <2,500* 4 700 <250* <250* <250* - -- No FP,No S
<br /> 6/19/2002 — <5 000 17,000 <500 <500 <500 <500 -- No FP No S
<br /> 9/12/2002 <000 <500 3,100 <50 <50 <50 85 <50 No FP No S
<br /> 12/3/2002 -- <2,000 3,100 <50 <50 <50 80 — No FP, No S
<br /> 03/11/2003 <10 000 <2,000 3,200 <50 <50 <50 <50 — -
<br /> 06/09/2003 <25 000 <5,000 10,000 <250 <250 <250 <120 --09/1712003 <10 000 <2,000 3,600 <100 <100 <100 <50
<br /> 1211112003 <5,000 <1,000 3,200 J <50 <50 <50 <25 --03/1012004 <25,000 <5 000 6,400 J <250 <250 1 <250 <120 -
<br /> 06/1712004 1 <10,000 <2,000 3,100 <100 <100 <100 <50 -- <400
<br /> MW-2 6/24/1998 -- <200 33 <20 <2 0 <20 -- -- -- No FP,No S
<br /> 9/21/1998 — <200 <2 0 <2 0 <2 0 <20 - — No FP,No S
<br /> 12/14/1998 -- <200 <2 0 <2 0 <2 0 <2 0 -- -- No FP, No S
<br /> 3/31/1999 — <200 <2 0 <2 0 <2 0 <20 — -- No FP, No S
<br /> 6/11/1999 -- <200 222 <2 0 <2 0 <20 -- -- -- No FP,No S
<br /> Report Date August 2,2004 Page 1 of 8
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