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P - <br /> Tabl� a&f 2 <br /> Groundwater Elevation and Analytical Data <br /> Former ARCO Service Station#4493 <br /> 205 North Center Street <br /> Stockton,California <br /> Well Depth Groundwater Change in TPH as Ethyl- <br /> Well Date Elevation to Water Elevation Groundwater Gasoline Benzene Toluene benzene Xylenes MtBE MtBE(8260 TBA DO <br /> Number Sampled (feet,MSL (feet,TOC feet,MSL} feet,MSL b) (Ppb) b} b b) b b (ppb) m !L <br /> MW-5 06119100 P 12.03 12.98 -0.95 -- <br /> <50 2.75 <0.500 <0.500 <0.500 <2.50 <2.0 <200` 2.09 <br /> MW-6 06/19/40 P 13.26 13.81 -0.55 <50 1.87 <0.500 0.523 2.34 171 1 <2 1.83 <br /> MW-7 06119100 P 11.07 11.87 -0.80 <50 <0.500 <0.500 <0.500 <0.500 <2.50 <2.0 <200` 1.78 <br /> TOC =Top of casing <br /> MSL =Mean Sea Level <br /> TPH =Total petroleum hydrocarbons <br /> ppb =Parts per billion <br /> P =Well purged prior to sample collection <br /> NP =Well not purged prior to sample collection <br /> < =below detection limit <br /> a =Samples were analyzed for TBA, DIPE, ELBE,TAME,and 1,2-DCA by EPA Method by 8260 All oxygenates were reported non-detect. <br /> b = Samples were analyzed for TBA, DIPE, EtBE,TAME,and 1,2-OCA by EPA Method by 8260 All oxygenates except MtBE were reported non-detect <br /> c =Samples were analyzed for DIPE, ELBE,TAME,1,2-DCA, EDB,and Ethanol by EPA Method by 8260. All oagenates were reported non-detect. <br /> it <br /> I <br /> i <br /> I <br /> I <br />