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TABLE 1 <br /> Current Groundwater Monitoring and Analytical Data <br /> 2900 East Harding Way,Stockton,California <br /> [analytical results in micrograms per liter(ug/L)l <br /> Wellhead GW m m c° I m C <br /> Date Well ID DTW TPHg TPHd 0 m m m TBA 1,2-DCA EDB <br /> Elevation Elevation m o �, LL 0) <br /> K X <br /> W O <br /> 02/04/11 MW1 22.88 51.50 -28.62 130- 1,100 1.1 <0.5 <0.5 <1.0 <0.5 <5.0 2.6 <0.5 <br /> MW2 23.29 51.96 -28.67 <50 <50 <0.5 <0.5 <0.5 <1.0 - 1.3' <5.0 34 <0.5 <br /> MW3 22.65 51.29 -28.64 <50 <50 <0.5 <0.5 <0.5 <1.0 - <0.5 <5.0 <0.5 <0.5 <br /> MW4 22.60 51.23 -28.63 <50 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <5.0 <0.5 <0.5 <br /> MW5 23.46 52.14 -28.68 <50 <50 <0.5 <0.5 <0.5 0.0 <0.5 <5.0 <0.5 <0.5 <br /> Notes: <br /> DTW =Measured depth to groundwater in well(feet) <br /> GW Elev =Groundwater Elevation-Calculated groundwater elevation in well(feet MSL) <br /> TPHg =Total Petroleum Hydrocarbons as Gasoline <br /> TPHd =Total Petroleum Hydrocarbons as Diesel <br /> Fuel Oxygenates =methyl ted-butyl ether,dFsopropyl ether,ethyl tent-butyl ether,and fent-amyl methyl ether <br /> TBA =t-Butanol <br /> 1,2-DCA =1,2-Dichloroethane <br /> EDB =1,2-Dibromoethane <br /> • =methyl tert-butyl ether only(not detected above 50 ug/L) <br /> - =Not analyzed <br /> < =Less then method detection limit(not detected) <br /> =methyl tert-butyl ether <br /> Wellhead elevations after the 6/11/09 event use resurveyed data by Epic Lard Surveytng,Inc. <br />