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i <br /> WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 7910 Lower Sacramento Road <br /> Stockton, CA <br /> MTBE MTBE Depth to GW SPH <br /> Well ID Date TPPH B T E X 8020 8260 TOC Water Elevation Thickness <br /> u IL u IL (UQ/L (u/L (u/L (u/L (u/L MSL ft MSL ft <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 MW-1 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 Surveying of Vallejo, California Previous elevations referenced to site datum <br /> = Laboratory(NET, Inc) reported persistent toluene and xylene in laboratory supplied trip blanks and nnse water Equipment blank <br /> and laboratory method blank contained toluene (0 0007 and 0 00034, respectively)and xylenes (BDL and 0 00048, respectively) <br /> Site surveyed January 14, 2002, by Virgil Chavez Land Surveying of Vallejo, California <br /> I <br /> i <br /> P 8 . <br />