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TABLE 1 <br /> Current Groundwater Monitoring&Analytical Data <br /> ARCO Service Station No. 6080 <br /> 85 E. Louise Avenue, Lathrop, CA <br /> TOC Depth to Measured Calc. <br /> SPH GW GRO B T E .X MTBE TBA DIPS ETRE TAME Ethanol 1,243CA D.O. <br /> Well No. Date Notes Elevation Water Thickness Elev. (pglL) (pglL) (pglL) (pglL) (NglL) (pglL) (pglL) (pglL) (pglL) (pglL) (pglL) (pglL) (mglL) Comments <br /> (K MSL) (feet) (feet) (ft-MSL) <br /> MW-1 09/06/07 14.48 12.35 0.00 2.13 <50 <0.50 <0.50 <0.50 <0.50 6.65 <20 <0.50 <0.50 <0.50 <300 <0.50 2.7 <br /> MW-2 09!06107 13.63 11.50 0.00_ 2.13 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <20 <0.50 <0.50 <0.50 <300 <0.50 3.0 <br /> MW-3 09tQ6107 14.OD 11.91 0.00 2.09 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <20 2.4 <0.50 <0.50 <300 <0.50 3.0 <br /> Notes: <br /> GRO=Gasoline range organics <br /> B=Benzene <br /> T=Toluene <br /> E=Ethylbenzene <br /> X=Total xylenes <br /> MTBE=Methyl tert-butyl ether <br /> TBA=Tert-butyl alcohol <br /> DIPE=Dksopropyl ether <br /> ETBE=Ethyl terl-butyl ether <br /> TAME=Tert-amyl methyl ether <br /> 1,2-DCA =1,2-Dichloroethane <br /> D.O.=ā¯‘issoived Oxygen;rounded to the nearest tenth <br /> SPH=Separate-phase hydrocarbons <br /> TOC=Top of casing(surveyed) <br /> Cala GW Elev.=Calculated groundwater elevation=TOC-Depth to Water+0.75"(Measured SPH Thickness);assuming a specific gravity of 0.75 for SPH <br /> ft-MSL=feet above mean sea level <br /> mglL=Milligrams per Aer <br /> pglL=Micrograms per liter <br /> <=Analyte was not detected above the specified method detection limit(MDL);except after 2006 Quarter 2 where reportinglimits are used. <br /> =Not measured or analyzed <br /> 6080 3007 Tables.xls Page 1 of 1 SECOR <br />