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TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3708,2705 COUNTRY CLUB BOULEVARD, STOCKTON, CA <br /> Reference Depth to Groundwater Ethyl- Total TPH as Other Oxygenates Dissolved <br /> Monitoring Elevation Groundwater Elevation Benzene Toluene benzene Xylenes gasoline MTBE and Additives Lead <br /> Well - _ Date (feet) (feet) (feet) (pg/L) (pg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µglL) (pg/L) <br /> I=Sample analyzed outside EPA recommended holding time <br /> m=tert-Amyl methyl ether <br /> n=Ternary butyl alcohol <br /> o=Grab groundwater sample collected from well <br /> p=Samples collected 3 March 2004 did not arrive at laboratory on time site resampled 22 March 2004 <br /> I <br /> TPH=Total Petroleum Hydrocarbons by EPA Method 8015 <br /> MTBE=Methyl tertiary butyl ether by EPA Method 8020 Modified,except as noted <br /> Other oxygenate and additives may include ethanol,tert-butyl alcohol,dnsopropyl ether,ethyl tertiary butyl ether,tertiary amyl methyl ether 1,2-dibromocthane,and l,2-dichloroethane by <br /> EPA Method 8260 All analytes were reported below the laboratory detection limit,except as noted <br /> NA=Not analyzed <br /> NC=Not calculated <br /> ND=Not detected <br /> NM=Not measured <br /> NS=Not sampled <br /> }iglt=Micrograms per liter <br /> Note TPH-g results beginning March 2002 include MTBE <br /> g 1projectsl737081master5wp'q l20413708gw xis Page 23 of 23 <br />