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D <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No 6080 <br /> 85 E Louise Avenue, Lathrop, CA <br /> TPHg=Total petroleum hydrocarbons as gasoline(reported as gasoline range organics(GRO)in the analytical report) <br /> TPHd=Total petroleum hydrocarbons as diesel(reported as diesel range organics(DRO)in the analytical report) <br /> MtBE=Methyi tert-butyl ether <br /> DO=Dissolved oxygen(post purge value) <br /> bgs=below ground surface <br /> msl=mean sea level <br /> pglL=micrograms per liter <br /> mg/L=milligrams per liter <br /> P/NP=purged/not purged <br /> <=below given laboratory detection limits <br /> —=not measured or analyzed <br /> Beginning 3/14/2003-TPHg and BTEX analyzed by EPA Method 8260B <br /> [1]=Chromatogram Pattern Weathered Gasoline C6-C12+Unidentified Hydrocarbons C6-C12 <br /> [2]=Chromatogram Pattern Unidentified Hydrocarbons C6-C12 <br /> Data Qualifier Definitions <br /> U=The analyte was analyzed for,but was not detected above the sample reporting limit <br /> J=The analyte was positively identified,the associated numerical value is the approximate concentration of the analyte in the sample <br /> N=The analysis indicates the presence of an analyte for which there is presumptive evidence to make a tentative Identification <br /> NJ=The analysis indicates the presence of an analyte that has been tentatively identified and the associated numerical value represents its approximate concentration <br /> UJ=The analyte was not detected above the reported sample reporting limit However,the reported reporting limit is approximate and mayor may not represent the actual limit of quantitation <br /> necessary to accurately and precisely measure the analyte in the sample <br /> R=The sample results are rejected due to identification or other analytical issues <br /> ND=Not detected above reported detection limit' <br /> Report Date July 23,2004 Page 303 <br />