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i Table Z Groundwater Analytical Results-Oxygenate COmpounds Former Tosco(Unocal)Service Station#6981 i 4707 Pacific Avenue I I Stockton,California I I'll If) DATE MET"ANOL. E'THANOI, 3TBA MTBE DIM $TAE TAME 1.2-OCA 1;0� (p h) (!'Ph) (P h) ( h) (Ppb) ( h) (ppb) ( h) (PPnr) MW-1 12/08/97 WELL PAVED OVER -- <2 0 <2 0 I - -- 01/05/98 <500 <;00 20 <2 0 <2 0 <500 <1 nn 05/27/98 -- - 30 <2 n <2 n<2 n <2 n I -- -- 07/21/99 -- / 500 <100 27 <2 n -- <500 <100 20 <2 0 <2 0 <2 0 10/14199 - -- -- <2 n <z n <2 n 01125-26199 -- <500 <100 51 <2 0 <2 0 <2 0 I -- nan9/-20199 -- <5nn <1nn za -- <1 nn <2 n <2 0 <z 0 <2 0 07115-I(1199 -- <2 0 <z 0 <2 n -- -- In/25-26/99 -- <Inn R -- nl/27-28/00 -- -- -- -- 06/26-27/00 -- -- <1nn 2°� <2 0n <z 00 <2 00 2 n <2 n <z n <z n <2 n 09122-21I00 <2 00 <2 00 <2 00 <1,0n0 <I00 <2 00 -u 2126-27/00 -- Q nn 4(lb <2 DO 01107-08/01 -- <1,000 <100 <2 00 <2 00 <2 00 o <2n <20 i <20 <2n 06/26-27/01 <1 000 <100 <2 n <2 n i, <l,n0n <101) <2 0 <2 0 <2 0 <2 n <2 0 <2 6 09/12-I1/0I -- <1 n 12112-11/01 -- <5nn <20 <1 0 01/20-21/02 -- <500 <Inn <2n <20 <2n <2n ' <20 <2n <5nn <I0n <2 0 <2 0 <2 0 <2 n <2 0 <2 0 06106-07/02 -- 09/10/02 - <500 <100 <2 n <2 0 <2 n <2 n I <z a <2 n 12130-31102 <5nn <100 <2 0 <2 n <2 0 <2 0 <2 <2 0 -- 0 <2 0 <500 <1 nn <2 0 <2 0 <2 0 <2 n <2 0 na/29-an/n� -- + MW-2 12/08/97 20 <1,700 <110 390 <6 7 <6 7 <6 7 - - � -- 01/n519R -- <10 nnn <2 006 100 <40 <40 <40 -- 05/27/98 -- <10 000 <2 0011 270 <40 <40 <40 I -- -- 07/21/98 -- <500 <Inn ]so <2 0 <2 0 <2 0 -- -- 10/14/99 -- <2 500 <5nn 190 <1n <1n <10 01125-26199 -- <500 <100 170 <2 n <2 0 <2 0 - -- <40 <40 041- <100 1 R0 <2 0 <2 0 <2 0 /1920199 -- <1 000 <200 180 <40 "-,j -- 0 /19-2 199 -- -- � -- 10125-26199 -- - <500 200 <In <10 <10 -- -- � *1/30/61 6981xIon 178