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i <br /> WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 7910 Lower Sacramento Road <br /> Stockton, ICA <br /> MTBE MTBE Depth to GW SPH <br /> Wel! ID Date TPPH B T E X 8020 8260 TOC Water Elevation Thickness <br /> ug/L)( (ug/L (Ug/L u /L u IL ug/L)( (ug/L MSL ft MSL ft <br /> I <br /> i <br /> Notes <br /> a=Change in elevation of MW-2 on August 26, 1993,due to well head repairs <br /> b=Change in elevation of MWA on February 2,2000,due to well head repairs <br /> c=Concentration reported is an estimate value above the linear quantitation <br /> d=This sample analyzed outside of EPA recommended hold time <br /> e=Site wells surveyed to mean sea level on January 14,2002, by Virgil Chavez Land Sury J yang of Vallejo, California Previous elevations referenced to site datum <br /> *=Laboratory(NET, Inc)reported persistent toluene and xylene in laboratory supplied tnp (blanks and rinse water Equipment blank <br /> and laboratory method blank contained toluene(0 0007 and 0 00034, respectively)and xylehes(BDL and 0 00048, respectively) <br /> Site surveyed January 14,2002, by Vngd Chavez Land Surveying of Vallejo,California <br /> I <br /> Page 8 <br /> 0 <br />