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WELL CONCENTRATIONS
<br /> Shell branded Service Station
<br /> 161131 Pacific'Avenue
<br /> Stockton, CA 1
<br /> T Depthto Depth to I SPH DO
<br /> Well ID Date TPPH B T E X 8020 8260 TOC Water SPH Elevation Thickness Reading
<br /> u /L -(ug/-L) u /L u /L I u IL (ug/L (ug/L MSL ftft MSL ft M
<br /> VEW-2 05/11/2001 130,000 9,900 14,000 2,0001 231,000 NA <500 NA 3173 i NA NA NA NA
<br /> VEW-2 08/3012001 100,000 2,600 3,900 2,00011 18,000 NA <25 NA 3461 NA NA NA NA
<br /> VEW-2 12/1012001 82,000 2,400 5,000 2,7001 161,000 NA , <25 1314 3373 1 NA 1-2059 NA NA
<br /> VEW-2 02/05/2002 170,000 9,200 14,000 2,2001 27,000 NA <2,500 1314 3161 NA 1-1847 NA NA
<br /> VEW-2 06/03/2002 90,000 2,300 3,000 2,6001 181,000 NA <500 1314 3255 i NA 1-1941 NA NA
<br /> VEW-2 09/03/2002 100,000 2,900 3,900 2,100[ 21000 NA <50 1314 3549 �' NA 1-2235 NA NA
<br /> VEW-2 11/07/2002 68,000 1 1,200 660 2,2001 14 000 NA <250 1314 3613 1 NA 1-2299 NA NA
<br /> VEW-2 1 02/21/2003 82,000 1,900 1,500 2,6001', 16;000 NA <250 1314 3505 NA 1-21 91 NA NA
<br /> VEW-2 1 03/14/2003 NA NA NA INA NA NA NA 1314 3470 NA 1-2156 NA NA
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<br /> Abbreviations I�
<br /> TPPH=Total petroleum hydrocarbons as gasoline by EPA Method 82608, prior to May 11, 2001,analyzed by EPA Method 8015
<br /> TEPH=Total petroleum hydrocarbons as diesel by modified EPA Method 8015
<br /> BTEX= Benzene,toluene, ethylbenzene,xylenes by EPA Method 8260B, prior to May 11,2001,analyzed by EPA Method 8020
<br /> MTBE=Methyl4ertiary-butyl ether
<br /> TOC=Top of Casing Elevation
<br /> SPH=Separate-Phase Hydrocarbons I
<br /> GW=Groundwater
<br /> DO= Dissolved Oxygen {{
<br /> ug/L= Parts per billion f'
<br /> ppm = Parts per million I k
<br /> MSL= Mean Sea Level I I }
<br /> ft=Feet I
<br /> <n= Below detection limit
<br /> NA= Not Applicable
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