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WELL CONCENTRATIONS <br /> Former-Shell Service Station <br /> 1071 North Main Street <br /> Manteca, CA <br /> MTBE MTBE Depth to GW DO <br /> Well ID DateIT:PPPH B T E k 8020 8260 DIPE ETRE TAME TBA 1,2-DCA EDB Methanol Ethanol To Water Elevation Reading <br /> u L u L u !L u /L u IL u IL u L u L u 1L u IL u !L u L u IL u L MSL ft MSL ( m <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by EPA Method 82608,pnor to July 11,2001,analyzed by EPA Method 8015,except where noted <br /> BTEX=Benzene,toluene,ethyibenzene,xylenes by EPA Method 82608,Prior to July 11,2001,analyzed by EPA Method 8020,except where noted <br /> MTBE=Methyl tertiary butyl ether <br /> RIPE=Di-Isopropyl ether by EPA Method 82608 <br /> ETBE= Ethyl tertiary butyl ether by EPA Method 82608 <br /> TAME=Tertrary amyl methyl ether by EPA Method 82608 <br /> TBA=Tertiary butyl alcohol or Tertiary butanol by EPA Method 8260E <br /> 1,2-DCA=1,2-drehloroethane by EPA Method 8010 or 82608 <br /> EDB=Ethylene dibromlde or1,2-drbromaelhane by EPA Method 8010 or 62608 <br /> TOC=Top of Casing Elevation <br /> DO=Dissolved Oxygen <br /> GW=Groundwater <br /> ug/L=Parts per ballon <br /> ppm=Paris per million <br /> MSL=Mean sea level <br /> ft =Feet <br /> cn=Below detection limit <br /> (D)=Duplicate sample <br /> `- <br /> a=Sample reanalyzed past hold time,results should be considered estimatest <br /> b=Hydrocarbon does not match pattern of laboratory's standard iL qty ; �rA�1 <br /> Ethanol and Methanol analyzed by EPA Method$2600 <br /> TPPH and STEX analyzed by EPA Method 82608 an January 23,2001 <br /> For the April 28,2G01 event,Sequoia's couner mistakenly took samples which were intended for Kiff Analytical"r <br /> Site surveyed May 7,2002 by Virgil Chavez Land Surveying of Vallejo,CA _ r, <br /> fid X}- - <br /> Page 4 <br /> r <br />