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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No. 5450 <br /> 1617 W. Fremont Street, Stockton, CA <br /> TPHg=Total petroleum hydrocarbons as gasoline(reported as gasoline range organics(GRO)(C4-C12 as of 41112004)in the analytical report) <br /> TPHd=Total petroleum hydrocarbons as diesel(reported as diesel range organics(DRO)(C10-C36 as of 41112004)in the analytical report) <br /> MIRE=Methyl tert-butyl ether <br /> TOC=Top of Casing <br /> DO=Dissolved oxygen(post purge value) <br /> bgs=below ground surface <br /> msl=mean sea level <br /> pg/L=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 /> =analyzed using EPA Method 82608 <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 may or 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.March 28,2005 Page 3 of 3 <br />