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L I Table 2 Groundwater Analytical Results-Oxygenate Compounds G Former Tosco(Unocal)Service Station#6981 q 4707 Pacific Avenue Stockton,California 9� WELL ID DATE METHANOL ETHANOL TBA MTBE DIPE ETBE TAME 1,2-DCA 190B (Lm) b) (Ppb) b) b) (ppb) (PP b) (PP b) (Ppb) I I + l MW-1 12/08/97 WELL PAVED OVER -- -- _ -- <100 20 <20 <2 0 <2 0 - -- D3/05/98 -- <500 <100 _ II 05/27/98 -- <500 <100 30 <2 0 <2 0 <210 ! -- 07/21/98 -- 1,500 <100 27 <2 0 <2 0 <2,0 II 10/14/98 <500 <100 20 <2 0 <2 0 <2 0 01/25-26199 -- <500 <100 53 <2 0 <2 0 <2 0 -- I� -- 04/19/-20199 -- <500 loo 24 <2 0 <2 0 <2 0 -- 07/15-16199 -- -- <100 <2 0 <2 0 <2 0 <2 0 -- 10/25-26/99 -- <100 38 <2 0 <2 0 <2 0 -- 01127-28100 -- -- <100 3 0 <2 0 <2 0 <2 o -- -- i 06/26-27100 -- -- k <100 <2 00 <2 00 <2 00 <z 00 -- -- 09/22-23/00 <100 <500 <50 <2 0 <2 0 <2 0 <2I 0 <201 <2 0 12126-27100 -- <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 od <2 00 06/26-27101 -- <1,000 <100 <2 0 <2 0 <2 0 <2 0 <2 0 � <2 0 09112-13101 -- <1,000 <100 <2 0 <2 0 <2 0 <l 0 �2 0 S <2 0 I 12112-13101 -- <500 -20 <10 <10 <10 <10 <10, <10 03120-21102 -- <500 <100 <2 0 <2 0 <2 0 <2 0 <2 0 <2 0 06/06-07/02 -- <500 <l00 <2 0 <2 D <2 0 <2 0 1 20#' <2 0 09130ro2 -- <soo <100 <2 0 <z a <2 0 <2 0 <2 0„ <2 0 12/30-31102 -- <500 <100 <2 0 <2 0 <2 0 <2 0 <2 0 <2 0 03129-30103 -- <500 <100 <2 0 <2 0 <2 0 <2 0 i<2 01 <2 0 06125-26/03 -- <500 <100 <2 0 <2 0 <2 0 <2 0 <2 Off <2 0 09124-25/03 -- <500 <100 <2 0 <2 0 <2 0 <2 0 1<2 0 <2 0 ' � I MW-2 12/08/97 20 <1,700 <330 390 <6 7 <6 7 <6 7 -- 03/05/98 <10,000 X2,000 300 <40 <40 <40 -- -- 05/27/98 -- <10,000 <2,000 270 <40 <40 <40 -- I 07/21/98 -- <500 <100 180 <2 0 <2 0 <2 0 -- -- 10/14/98 -- <2,500 <500 190 <10 <10 <lo 01/25-26/99 <500 <100 170 <2 0 <2 0 t2 0 -- � -- 04/19/-20199 -- <1,000 <200 180 <4 0 <4 0 <4 0 6981 XI38 i I� I {� As025/03Y $