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WELL CONCENTRATIONS <br /> Former Texaco Service Station <br /> 440 W.Charter Way _ <br /> Stockton,CA ■ <br /> MTBE MTBE Depth to GW SPH 00 <br /> Well ID Date TPPH TEPH B T £ x 8020 8260 DIPS ETRE TAME TBA 1,2-DCA EDB Ethanol Methanol TOC Water Elevation Thickness Reading <br /> u 1L u L u L u 1L Lug/L) u IL u u 1L u IL u L u u !L (ug/L u (ug/L (ug/L MSL ft MSL ft m <br /> VEW-3 05/16/2000 <50 0 NA 1 489 1 119 106M 233 1 632 986 <2 00 1 <200 1 <2 DO <100 c2 00 <2 00 NA NA NA 1913 NA NA NA <br /> VEW 3 081301200D X50 0 162 <0 SW <0 SW <0 5W <05W 855 961 <2 00 1 <2 00 1 <2 00 <100 <2 00 <2 00 NA NA NA 2027 NA NA NA <br /> VEW3D 02120!2002 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA 935 NA NA NA NA <br /> VEW-3S 0212012002 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA 928 NA NA NA NA <br /> VEW-4 05118120W 347 NA 886 290 <05W 184 206 008 <2 00 <2 OD <2 W 156 Q W <2 W NA NA NA 1927 NA NA NA <br /> vEW-4 68/3012000 291 1 720 4 43a 3 21 a <0 50Da 0 910a <2 Me 1 142 <2 00 <2 00 <2 00 121 <2 W <2 OD NA NA NA 2048 NA NA NA <br /> VEWAD 02M OMIX12 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA 942 NA NA NA NA <br /> VEW-4S 0212012002 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA 941 NA NA NA NA <br /> Abbrnvlations <br /> TPPH a Total petroleum hydrocarbons as gasoline by EPA Method 82608,prior to May 17 2001 analyzed by EPA Method 8015 <br /> TEPH a Total petroleum hydrocarbons as diesel by modified EPA Method 8015 <br /> BTEX=Benzene,toluene ethylbenzone,xylenes by EPA Method 82608 prior to May 17 2001 analyzed by EPA Method 8020 <br /> MTBE=Methyl tertiary butyl other <br /> DIPE¢Dl,lsppropyt ether <br /> ETBE=Ethyt tertlary butyl ether <br /> TAME=Tertiary amyl methyl ether <br /> TBA=Tertiary butyl alcohol <br /> 1,2-OCA=1,2-Dkhloroethane <br /> EDB-1,2-Dlbromoethane <br /> TOG a Top of Casing Elevation <br /> SPH a Separate-Phase Hydrocarbons <br /> GW a Groundwater <br /> DO a Dissolved Oxygen <br /> ppm A Parts per million <br /> ug/L=Parte per billion <br /> MSL=Mean sea level <br /> It a Feet <br /> <n=Below detection limit <br /> NA=Not applicable <br /> ND=Not detailed at or above the minimum quantltatlon limit. <br /> Page 25 <br />