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Table 2 Groundwater Analytical Results-Oxygenate Compounds Tosco(Unocal)Service Station#5886 2701 West March Lane i Stockton,California W11LL 1b DATE ETHANOL TBA MTBE DIPS ET81✓ 'TAME 11,2-DCA EDB (ppb) (Ppb) (P b) (Ppb) (ppb) (ppb) (ppb) (ppb) I ND' ND' 20,000 ND' ND' ND' --�, -- MW-2 02128-29100 ND' --'i -- ND' ND' 15,400 ND' ND' (cont) 05110-11100 ND' ND' 08/03-04100 ND' ND' 15,600 ND 11/16-17/00 ND 1,200 1 19,000 ND ND 54 -- I ND' N D ' ND' ND' ND 02105-06101 ND' ND 1 6,300 -- -- -- - 04/30/01 -- --' 3,120 --E ND' ND' NDi ND' ND 2,900 05107-08101 ND' ND <50 <50 500 3,600 <50 <50 <50 II <25,000 <2 08120-21101 1 <25 <25 <z5 11119-20101 <12,000 <500 4,000 <25 <25 02111-12102 <12,000 <2,s4a a,60o <5a <50 <50 <50 <50 <500 <100 28 <2 0 <2 0 <2 0 <2 0 <2 0 os14z-Q3/oz <4 0 <4 0 <1,000 <200 ' 200 <4 0 <4 0 <4 0 Qs1a1-a21o2 <10 <IO <lo 11120-21102 <2,500 <500 290 <10 <10 02120-21/03 <50fl <100 28 <2 0 <2 0 <2 0 <2 0 <2 0 i it i MW-3 I2/01/97 ND' ND' i 2,200 ND' ND' ND' --II -- 03/25/98 ND' 6,100 8,500 ND' ND' ND' --1 06/17/98 ND 2,600 7,300 ND ND 20 09/01/98 ND ND 4,540 ND ND 99 --i 12/03/98 ND' ND' I 5,000 ND' ND' ND' -- -- 03/01199 ND° ND' 31,000 ND' ND' ND' -- 06101-02199 ND' ND' ' 36,000 ND' ND' ND' --I� -- 08/16-17/99 ND' ND' ' 17,000 ND' ND' ND' -- -- 11/29-30199 ND' ND' 21,000 ND' ND' ND' --I -- ' 42,000 ' 02128-29104 ND' ND ND NDI ND' I�05/10-11100 ND' 112,000 122,004 ND' ND ND -- -- 08143-04100 ND' ND' 20,900 ND' ND' ND' --i -� 11116-17100 ND' ND' 11,000 ND' ND' ND' -i -- 02/05-06101 ND' ND' 18,004 ND' ND' ND' ND' ND' II 04/30/01 -- -- 11,800 -- -- -. --I -- 05107-08101 ND' ND' 11,700 ND' ND' ND' ND' ' ND 11 08120-21101 <38,000 <3,800 5,200 <77 <77 <77 <77 <77 ji 2121103 5886 x*137 u ' I , p