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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 DIPS ELBE TAME 1,2-DCA EDB Methanol
<br /> Humber Sampled (pg/L) (pg/L) (pg/L) (pg1L) {1rgIL) WIL) WIL) (pg/L) (pgll-) Comments
<br /> MW-4 9/13/2001 - <5,000 7,600 <100 <100 <100 - - - No FP,No S
<br /> 12/11/2001 - <1,000 5,600 <100 <100 <100 - - - No FP,No S
<br /> 3/14/2002 - <100* 4 900 <10* <10* 33 -- -- -- No FP,No S
<br /> 6/19/2002 -- <500 2,900 <50 <50 <50 <50 - - No FP,No S
<br /> 9/12/2002 <40,000 <5,000 16,000 <500 <500 <500 <500 <500 -- No FP No S
<br /> 12/3/2002 - <20,000 6,600 <500 <500 <500 <500 - -- No FP,No S
<br /> 03/11/2003 <50,000 <10 000 4,200 <250 <250 <250 <250
<br /> 06/09/2003 <10,000 <2,000 3,200 <100 <100 <100 <50 -- --
<br /> 09/16/2003 <50,000 <10,000 6 500 <500 <500 <500 <250 - -
<br /> 12/11/2003 <10,000 <2 000 6,500 J <100 <100 <100 110 -- --
<br /> 03/10/2004 <20,000 <4,000 6,900 J <200 <200 <200 <100 - -
<br /> 06/17/2004 <50,000 <10,000 10,000 <500 <500 <500 <250 -- 590
<br /> 09/23/2004 <5,000 1,600 2,500 <50 <50 <50 47 <25 <150
<br /> 12121/2004 <25,000 <5,000 2,800 450 <250 <250 <120 <120 <200
<br /> MW-5 9/13/2001 - <100 <2 0 <2 0 <2 0 <2 0 - -- - No FP No S
<br /> 12/11/2001 -- <20 <2 0 <2 0 <2 0 <2 0 -- - No FP,No S
<br /> 3/14/2002 - <5 0 <0 50 <0 50 <0 50 <0 50 - - -- No FP,No S
<br /> 6/19/2002 -- <5 0 <0 50 <0 50 <0 50 <0 50 <0 50 -- -- No FP,No S
<br /> 9/12/2002 <40 <5 <0 5 <0 5 <05 <0 5 <0 5 <0 5 -- No FP,No S
<br /> 12/3/2002 -- <20 <0 5 <0 5 <G5 <0 5 <0 5 -- - No FP,No S
<br /> 03/11/2003 <100 <20 <0 50 <0 50 <0 50 <0 50 <0 50 - -
<br /> 06/09/2003 <100 <20 <0 50 <1 0 <1 0 <1 0 <0 50 - -
<br /> 09/17/2003 <100 <20 <0 50 <1 0 <1 0 <1 0 <0 50 - -
<br /> 12/11/2003 <100 <20 <0 50 <1 0 <1 0 <1 0 <0 50 -- --
<br /> 03/10/2004 <100 <20 <0 50 <1 0 <1 0 <1 0 <0 50 -- --
<br /> 06/17/2004 <100 <20 <0 50 <1 0 <1 0 <1 0 <0 50 - <100
<br /> 09/23/2004 <100 <20 <0 50 <1 0 <1 0 <1 0 <0 50 <0 50 <100
<br /> 12/21/2004 <100 <20 <0 50 <1 0 <1 0 <1 0 <0 50 <0 50 <100
<br /> MW-6 9/13/2001 -- <100 <2 0 <20 <2 0 <2 0 - -- -- No FP,No S
<br /> 12/11/2001 -- <20 <2 0 <20 <2 0 <2 0 - - -- No FP,No S
<br /> 3/14/2002 - <50 <0 50 <0 50 <0 50 <0 50 -- -- -- No FP,No S
<br /> 6/19/2002 -- <5 0 <0 50 <0 50 <0 50 <0 50 <0 50 - -- No FP,No S
<br /> 9/12/2002 <40 <5 <0 5 <05 <0 5 <0 5 <0 5 <0 5 - No FP,No S
<br /> Report Date January 18,2005 Page 4 of 9
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