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Pa e2of2 <br /> Tab <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 DO <br /> Number Sampled (feet,MSL) (feet TOC) (feet MSL) (feet,MSL) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) mg/L <br /> MW-5 06/19/00 P 12.03 12.98 -0.95 -- <50 2.75 <0.500 <0.500 <0.500 <2.50 2.09 <br /> MW-6 06/19/00 P 13.26 13.81 -0.55 -- <50 1.87 <0.500 0.523 2.34 171 1.83 <br /> MW-7 06/19/00 P 11.07 31.87 -0.80 -- <50 <0.500 <0.500 <0.500 <0.500 <2.50 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,DIPS,EtBE,TAME,and 1,2-DCA by EPA Method by 8260. All oxygenates were reported non-detect. <br /> b =Samples were analyzed forTBA,DIPS,EtBE,TAME,and 1,2-DCA by EPA Method by 8260. All oxygenates except MtBE were reported non-detect. <br /> ND =Sample reported as non-detect. <br /> I <br /> I <br /> 077.41819.0021G W Tables <br />