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WELL CONCENTRATIONS <br /> Shell branded Service Station <br /> 1071 North Main Street <br /> Manteca, CA <br /> MTBE MTBE Depth to GW D.O <br /> Well ID Date TPPH B T E X 8020 8260 TOC Water Elevation Reading <br /> (ug/L (ug/L u IL ', u IL u IL ,, IL u L MSL ft MSL m <br /> i <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by EPA Method 8260B,prior to July 11,2001, analyzed by EPA Method 8015, except where noted <br /> BTEX=Benzene,toluene, ethylbenzene, xylenes by EPA Method 8260B, prior to July 11,2001, analyzed,by EPA Method 8020, except where noted <br /> MTBE=Meth*terbary-butyl ether <br /> TOC=Top of Casing Elevation <br /> GW =Groundwater <br /> ug/L=Parts per billion ! <br /> ppm=Paris per million - <br /> MSL=Mean sea level <br /> ft=Feet _ <br /> <n=Below detection limit - <br /> D=Duplicate sample <br /> f � <br /> Notes <br /> a=Sample re-analyzed past hold time, results should be considered estimates <br /> TPPH and BTEX analyzed by EPA Method 82608 on January 23,2001. w <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, Caldomia <br /> F <br /> } <br /> PO 4 • <br /> 01, <br /> 11 <br />