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Table 2 Groundwater Analytical.Results-Oxygenate Compounds Former Tosco(Unocal)Service Station#6981 �k ` 4707 Pacific Avenue Stockton,California i WELL ID DATE METHANOL ETHANOL TBA MTB9 DIPS E'TBE 'TAME 1,2-DCA EDB (APM) bj (ppb) WN bJ (ppb) (ppb) b) b) h R� MW-9 06126-27101 -- <1,000 <100 <2 0 <2 0 <2 0 <2 0 �DM, <2 0 (cont) 09/12-13/01 -- <1,000 <100 <2 0 <2 0 <2 0 <2 0 I<2 0 <2 0 12/12-13101 -- <500 <20 <1 0 <1 0 <1 0 <1 01 0�� <1 0 03120-21/02 -- <500 <100 <2 0 <2 0 <2 0 <2 0 I<2 01 <2 0 06106-07/02 -- <500 <100 <2 0 <2 0 <2 0 <2 0 I<2 O�� <2 0 09/30/02 <500 <100 <2 0 <2 0 <2 0 <2 0 I<2 0� <2 0 i 12130-31/02 -- -- -- -- -- __ 03/29-30/03 -- <500 <100 <2 0 <2 0 <2 0 <2 0 12 0 <2 0 <20 <20 <20 <20; <20 <100 <100 <2 0 <Z 0 <2 0 < 06125-26103 -- <500 <100 <20 <Z 0 09/24-21103 — 2 0 I.2 0' I MW-11 12/08/97 WELL PAVED OVER — -- -- i- -- 03/05/98 -- -- -- -- -- -- -- — -- 03/16/98 -- <2,500 <500 <10 <10 <10 <10 -- -- 05/27/98 -- <500 <100 17 <2 0 <2 0 <2 0 I 07/21/98 -- <500 <100 <2 0 <2 0 <2 0 <2 0 -- -- 10/14/98 -- <500 '<100 <2 0 <2 0 <2 0 <2 0 -- 01/25-26/99 -- <500 <100 <2 0 <2 0 <2 0 <2 0 -- -- 04119/-20199 -- <500 <100 <2 0 <2 0 <2 0 <2 0 -- 07/15-16199 -- -- <100 <2 0 <2 0 <2 0 <2 0 -- 10/25-26/99 -- -- <100 <2 0 <2 0 <2 0 <2 0 -- F 01/27-28/00 -- -- <100 40 <2 0 <2 0 <2 0 -- 06/26-27100 -- -- <100 <2 00 <2 00 <2 00 <2 00 -- 09/22-23/00 <1 00 <500 <50 <2 0 <2 0 <2 0 <2 0 <2 0! <2 0 12126-27/00 -- <1,000 <100 <2 00 <2 00 <2 00 <2 00 -- JI -- 03/07-08/01 -- <1,000 <100 <2 00 <2 00 <2 00 <2 00 <2 00 <2 00 06/26-27101 -- <t,000 <100 <2 0 <2 0 <2 0 <2 0 <2 0' <2 0 09/12-13101 -- <1,000 <100 <2 0 <2 0 <2 0 <2 0 I<2 0 <2 0 12112-13101 -- <500 1 <20 <10 <10 <10 <10 I<10� <10 03/20-21/02 -- <500 1<100 <2 0 <2 0 <2 0 <2 0 <2 0 <2 0 06/06-07102 -- <500 <100 <2 0 <2 0 <2 0 <2 0 <2 0i1 <2 0 09/30/02 -- <500 1<100 <2 0 <2 0 <2 0 <2 0 I<2 O; <2 0 6981 x1 138 � � � Al&/25/03