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TaW . <br /> Groundwater Analytical R -Oxygenate Compounds <br /> Tosco(Unocal)Service Station#5886 <br /> 2701 West March Lane <br /> Stockton,California <br /> WELL 1:0 DATE ETHANOL TBA MTBE RIPE ETRE TAME 1,2-DCA EDB <br /> (ppb) (ppb) (pph) (pph) (00) ON <br /> MW-1 12/01197 ND ND 66 ND ND ND - -- <br /> 01/25/98 ND ND 69 ND ND ND - <br /> 06/17/98 ND ND ND ND ND ND -- <br /> 09/01/98 ND ND ND ND ND ND -- -- <br /> 12/03/98 ND ND 110 ND ND ND - -- <br /> 03/01/99 ND ND 530 ND' ND' ND' -- -- <br /> 06/01-02199 ND' ND' 290 ND' ND' ND' -- -- <br /> 08116-17199 ND ND 80 ND ND ND -- -- <br /> 11129-30/99 ND ND 45 ND ND ND - <br /> 02/28-29100 ND' ND' 760 ND' ND' ND' -- -- <br /> 05/10-11/00 ND' ND' 171 ND' ND' ND' -- -- <br /> 08/03-04100 ND' ND' 1910 ND' ND' ND' -- -- <br /> 11/16-17/00 ND ND 1,700 ND ND 28 -- -- <br /> 02/05-06/01 ND' ND' 3,700 ND' ND' ND' ND' ND' 1 <br /> 04/30/01 -- __ 2,710 -- -- -- -- -' <br /> 05107-08101 ND' ND' 3,310 ND' ND' ND' ND' ND' <br /> 08/20-21101 <6,200 <620 1,100 <12 <12 <12 <12 <12 <br /> 11/19-20/01 <7,100 <290 2,500 <14 <14 <14 <14 <14 <br /> 02/11-12/02 03,000 <6,700 6,300 <130 <130 <130 <110 <130 <br /> 05102-03/02 <1,200 <250 300 <5 0 <5 0 <5 0 <5 0 <5 0 <br /> 08/01.-02/02 <50,000 <10,000 3,400 <200 <200 <200 <200 <200 <br /> MW-2 03/25/98 <br /> ND' ND' ND' ND' ND' ND' -- -- <br /> 06/17/98 ND ND 2,100 ND ND 67 -- <br /> 09101/98 ND ND 2,900 ND ND 51 -- -- <br /> 12/03/98 ND' ND' 4,800 ND' ND' ND' -- <br /> 03/01/99 ND' ND' 3,700 ND' ND' ND' - <br /> 06/01-02/99 ND' ND' 2 900 ND' ND' ND' -- - <br /> 08/16-17199 ND' ND' 13,000 ND' ND' ND' - -- <br /> 11/29-30199 ND' ND' 32,000 ND' _ ND' ND' "- -- <br /> 02/28-29/00 ND' ND' 20,000 ND' ND' ND' -- -- <br /> 5886 xfs//i1 SDf 37 <br /> 21 As of 08/02/02 <br />