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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 (erg/L) (pglL) (mg/L) (P9tL) (pg/L) WIL) (uglL) (PgIL) WIL) Comments
<br /> MW-1 11/20/1997 — <100 78 <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 39 <20 <20 <2 0 -- -- -- No FP,No S
<br /> 9/21/1998 — <2000 138 <20 <20 <2 0 — — No FP,No S
<br /> 12/14/1998 — <200 228 <20 <20 <2 0 -- — — No FP,No S
<br /> 12/14/1998 <200 314 <20 <20 <2 0 1 -- — — [D],No FP,No S
<br /> 3/31/1999 -- <200 392 <20 <20 <2 0 — -- -- No FP,No S
<br /> 6/11/1999 — <200 628 <2 0 <20 <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 2190[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 <4,000 <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 — --
<br /> 09/17/2003 <10,000 <2,000 3,600 <100 <100 <100 <50 --12/1112003 <5 000 <1,000 3,200 J <50 <50 <50 <25 -- --
<br /> 03/10/2004 <25,000 <5,000 6,400 J <250 <250 <250 <120 -- —
<br /> 06/17/2004 <10,000 <2,000 3,100 <100 <100 <100 <50 -- <400
<br /> 09/23/2004 5500 <100 80 <5 0 <5 0 <50 1 <2 5 <25 T 000
<br /> MW-2 6/24/1998 -- <200 33 <20 <2 0 <2 0 -- — — No FP No S
<br /> 9/21/1998 - <200 <2 0 <2 0 <2 0 <2 0 — -- -- No FP,No S
<br /> 12/14/1998 — <200 <2 0 <2 0 <2 0 <2 0 — — — No FP,No S
<br /> i
<br /> 3/31/1999 - <200 <2 0 <2 0 <2 0 <20 — — -- No FP,No S
<br /> Report Date October 25,2004 Page 1 of 8
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