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<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 (pglL) (pglL) (pg1L) (pg/L) Uig/L) (pg1L) (pg/L) (pglL) (pg/L) Comments
<br /> MW-4 12/20/2000 - <200 1,150[1](2) <20 <20 102 -- -- - No FP,No S
<br /> 3/16/2001 - <200 481 [2] <20 <20 378 -- - - No FP,No S
<br /> 6/21/2001 -- <500* 590 <10* <10* <10* -- -- - No FP,No S
<br /> 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 /> 3/1412002 w <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 /> 911212002 <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 /> 1 211 1/2 0 03 <10,000 <2,000 6,500 J <100 <100 <100 110 -- --
<br /> 03/10/2004 <20 000 0,000 6,900 J <200 <200 <200 <100 - --
<br /> 0 611 712 0 0 4 <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 <250 <250 <250 <120 <120 <200
<br /> 03/30/2005 <100 24 27 <1 0 <1 0 <1 0 <0 50 <0 50 --
<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 -- <50 <0 50 <0 50 <0 50 <0 50 -- -- - No FP,No S
<br /> 6/19/2002 - <50 <0 50 <0 50 <0 50 <0 50 <0 50 -- -- No FP,No S
<br /> 9/12/2002 <40 <5 <0 5 <0 5 <0 5 <0 5 <0 5 <0 5 - No FP,No S
<br /> 12/3/2002 -- <20 <0 5 <0 5 <0 5 <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 /> 0313012005 <100 <20 <0 50 <1 0 <1 0 <1 0 <0 50 <0 50 --
<br /> Report Date Aprd 25,2005 Page 4 of 9
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