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WELL CONCENTRATIONS <br /> Shell branded Service Station <br /> 1071 North Main Street <br /> 1 Manteca, CA <br /> MTBE MTBE 1--Depth to GW Do <br /> Wel! !D Date TPPH B T 1 E X 8020 8260 TOC Water E evation Reading <br /> u L u IL ` u IL u IL u IL u IL u IL MSL ft MSL m <br /> Abbreviations _ <br /> TPPH=Total petroleum hydrocarbons asgasoline by EPA Method 8260B,1pnor to July 11,2001, analyzed by EPA Method 8015, except where noted - <br /> BTEX=Benzene,toluene, ethylbenzene,xylenes by EPA Method 8260B,, nor to July 11,2001, analyzed by EPA Method 8020, except where noted <br /> MTBE=Methyl,tertiary-butyl ether <br /> TOC=Top of Casing Elevation <br /> GW=Groundwater W <br /> ug/L=Parts per billion _ <br /> ppm=Parts per million ' <br /> MSL=Mean sea level <br /> ft=Feet s <br /> <n=Below detection limit w <br /> D=Duplicate sample <br /> Notes <br /> a=Sample re-analyzed past hold time,results should be considered estimates <br /> b= Hydrocarbon does not match pattern of laboratory's standard <br /> TPPH and BTEX analyzed by EPA Method 82608 on January 23,2001 M <br /> For the April 26,'2001,event, Sequoia's couner mistakenly took samples which were intended for Kiff Analytical <br /> Site surveyed May 7,2002,by Virgil Chavez Land Surveying of Vallejo,California i <br /> i <br /> k _ <br /> P 4 <br />