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TABID • <br /> WELL CONCENTRATIONS <br /> Shell Oil Products Company <br /> 2575 Country CIub Boulevard <br /> Stockton, California <br /> WIC #204-7524-3505 <br /> Sample I Measured Corrected SP TPPH B T E X MTBE Comments <br /> GW Depth GW Elev <br /> Date (ft) (ft) (ft) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> RW-1A(DU P) <br /> 30-Jul-96 NA NA NA 140000 23000 28000 <500 14000 820000 MTBE by EPA Method 8260 890000 ppb <br /> 02-Apr-97 NA NA NA 130000 15000 24000 3400 19000 450000 E <br /> Abbreviations, <br /> NA=Not analyzed or not available <br /> (DUP)=Duplicate sample <br /> <x=Not detected at detection limit of x <br /> TPPH=Total Purgeable Petroleum Hydrocarbons carbon range C6 to C12 by EPA Method 8015(Modified) <br /> (previously Total Petroleum Hydrocarbons as Gasoline) <br /> BTEX=benzene,toluene,ethylbenzene, and xylenes by EPA Method 8020 <br /> MTBE=methyl-tertiary-butyl ether by EPA Method 8020 <br /> SP=Separate Phase hydrocarbon <br /> Notes <br /> a=Depth to groundwater measurement and reference elevation datum is top of boot(adapted for vapor extraction)at well head <br /> b= Depth to groundwater measurement and reference elevation datum is notched/marked on top north side of well casing <br /> Elevation referenced to mean sea level if measurable product was noted,elevation corrected using hydrocarbon specific gravity of 0 8 <br /> I <br /> 97371 5 <br />