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WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 2375 West Grant Line Road <br /> Tracy, CA <br /> MTBE Depth to GW <br /> Well ID Date TPPH B T B X 8260 TOC Water Elevation <br /> a <br /> ug/L)( (ug/L u IL ug/L)( (Ug/L u IL J MSL ft MSL <br /> 0 <br /> i <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by EPA Method 8260E <br /> a <br /> BTEX= Benzene,toluene, ethylbenzene,xylenes by EPA Method 82606 <br /> MTBE= Methyl-terhary-butylkether } _ <br /> TOC=Top of Casing Elevation <br /> GW =Groundwater s� <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 /> _ F <br /> a= Hydrocarbon does not match pattern of laboratory's standard <br /> Site surveyed March 7, 2003 by Mid Coast Engineers <br /> F <br /> i <br /> Pa e 2 • <br />