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i <br /> WELL CONCENTRATIONS <br /> Former Shell Service Station <br /> 1313 East Charter Way <br /> Stockton, CA <br /> MTBE Depth to GW <br /> Well 1D Date TPPN B T E X 8260 TOC Water Elevation <br /> u IL u L u ML SL M <br /> Abbreviations <br /> TPPH =Total petroleum hydrocarbons as gasoline by EPA Method 8260B <br /> BTEX=Benzene,toluene,ethylbenzene,xylenes by EPA Method 82608 <br /> MTBE= Methyl-tertiary-butyl ether <br /> TOC=Top of Casing Elevation <br /> GW=Groundwater <br /> ug/L=Parts per billion <br /> MSL=Mean sea level <br /> ft= Feet <br /> <n=Below detection limit <br /> NA=Not applicable <br /> Notes <br /> a=Hydrocarbon does not match pattern of laboratory's standard <br /> b=Top of casing elevation altered during wellhead maintenance <br /> Site surveyed December 23, 2002,by Virgil Chavez Land Surveying of Vallejo, California <br /> PIs2 <br />