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Table 2 Groundwater Analytical Results-Oxygenate Compounds Former Tosco(Unocal)Service Station#6981 ' 4707 Pacific Avenue Stockton,California WELL ID DATE METHANOL ETHANOL TBA MTBE DIPE ETBE TAME 1,2-DCA Dil m) (P �) 1pPb) (PP1 ) (ppb) (ppb) (ppb) (PP b) (PPb MW-9 09122-23100 <1 00 <500 <50 34 <2 0 <20 <2 0 92 <2 0 (cont) 12126-27100 -- <1,000 <100 235 <2 00 <2 00 <2 00 -- _- 03/07-08101 -- <1,000 <100 320 <2 00 <2 00 <2 00 364 <2 00 06126-27101 -- <1,000 <100 <2 0 <2 0 <2 0 <2 0 <20 <20 091I2-13101 -- <1,000 <100 <2 0 <20 <20 <2 0 <20 <2 0 12112-13101 -- <500 <20 <10 <10 <10 <10 <I0 <10 03120-21102 -- <500 <100 <2 0 <2 0 <2 0 <20 <2 0 <2 0 06/06-07102 -- <500 <100 <2 0 <2 0 <20 <2 0 �2 0 <2 0 MW-11 12/08/97 WELL PAVED OVER 03/05/98 -- -- -- 03/16/98 -- <2,500 <900 <10 <10 <10 <10 -- -- 05/27/98 <500 <100 17 <20 <2 0 <2 0 --07/21/98 -- <500 <100 <20 <2 0 <20 <2 0 -- -- 10114/98 -- <500 <100 <2 0 <2 0 <2 0 <2 0 -- -- 01125-26199 -- <500 <100 <2 0 <2 0 <2 0 <20 -- -- 04119/-20/99 -- <500 <100 <2 0 <2 0 <2 0 <2 0 -- -- 07/15-16199 -- -- <100 <2 0 <2 0 <2 0 <2 0 -- -- 10125-26/99 -- -- <100 <2 0 <2 0 <20 <2 0 -01/27-28/00 -- -- <100 40 <2 0 <2 0 <2 0 -- -- 06126-27100 -- -- <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 12/26-27100 -- <1,000 <100 <2 00 <2 00 <2 00 <2 00 -- -- 03/07-08/01 -- <1,000 <100 <2 00 <2 00 <2 00 <2 00 <2 00 <2 00 06/26-27101 -- <1,000 <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 <2 0 <2 0 12112-13101 -- <500 <20 <10 <1 0 <10 <1 0 <1 0 <1 0 03120-21/02 -- <500 <100 <2 0 <2 0 <2 0 <2 0 Q 0 <2 0 06106-07102 -- <500 <100 <2 0 <2 0 <2 0 <20 <20 <2 0 6981 x1138 . 107102