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WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> ,2320 North Eldorado <br /> Stockton, CA <br /> MTBE Depth to GW <br /> Well ID Date TPPH B JIT E X 8260 TOC Water Elevation <br /> u 1L u IL (ug/L u 1Lu IL (ug/L MSL ft MSL <br /> Abbreviations <br /> TPPH =Total petroleum hydrocarbons as gasoline by EPA Method 82608 <br /> STEX= Benzene,toluene,ethylbenzene,xylenes by EPA Method 82608 <br /> MTBE= Methyl-tertiary-butyl ether '+ <br /> TOC=Top of Casing Elevation <br /> GW=Groundwater T <br /> u L=Parts per billion <br /> MSL=Mean sea level <br /> ft=Feet - - <br /> <n= Below detection limit <br /> F _ ] <br /> NA=Not applicable <br /> Notes - V <br /> a=Hydrocarbons reported as TPH as gasoline do not exhibit a typical gasoline chromatographic pattem/Hydrocarbon does not match <br /> pattern of laboratorys standard <br /> b= Hydrocarbons reported as TPPH do not exhibit a typical Gasoline chromatographic pattern for sample MW-2 Two compounds ` <br /> not normally associated withigasoline,Tetrachloroethene and Trichloroethene, are present in the TPPH spectrum for sample MW4 <br /> Site surveyed March 7, 2003, by Mid Coast Engineers <br /> Pa e 2 <br />