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I' I <br /> I <br /> WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> - 11143'15 Waterloo Road <br /> Stockton, California <br /> 1 MTBE MTBE Depth to Depth to GW SPH DO <br /> Well ID Date TPPH TEPH B T E X 8020 8260 TOC Water SPM Elevation Thickness Reading <br /> u IL u IL u IL Ug/L)() (uIL) <br /> rF (ug/L (u2/L) u IL MSL ftftMSL ftm <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by EPA Metho 826�OB, pnor to July 23,2001,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 Method82608, pnor to July 23,2001,analyzed by EPA Method 8020 <br /> MTBE=methyl-tertiary-butyl ether �g <br /> TOC=Top of Casing Elevation <br /> I <br /> SPM W Separate-Phase Hydrocarbons ! j <br /> GW=Groundwater <br /> DO=Dissolved Oxygen <br /> ug/L=parts per billion <br /> 1 <br /> ppm=parts per million t <br /> msl=Mean sea level <br /> ft=Feet <br /> <n=Below detection limit I } <br /> 1 - <br /> NA=Not applicable N <br /> i <br /> Notes <br /> Site surveyed December 20,2001 by Virgil Chavez Land Surveying of Vallejo,California <br /> vi ti ♦1 <br /> �N - <br /> -I <br /> P 2 <br /> s � I� � s <br />