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WELL COANTRATIONS <br /> Shell-branded Service Station <br /> 2575 Country Club <br /> Stockton, CA <br /> Wic#204-7524-3505 <br /> MTBE MTBE Depth to GW SPH <br /> [_�!111D Date TPPH B T E X 8020 8260 TOC Water Elevation Thickness <br /> (ug/L (ug/L (u2/L) (Ug/L u IL (ug/L (ug/L MSL ft MSL ft <br /> Sannella Pier 04/2311998 NA NA NA NA NA NA NA 1390 1063 327 NA <br /> Sannella Pier 07129/1998 NA NA NA NA NA NA NA 1390 1063 327 NA <br /> Sannella Pier 10/06/1998 NA NA NA NA NA NA NA 1390 1085 305 NA <br /> Sannella Pier 01127/1999 NA NA NA NA NA NA NA 1390 1242 148 NA <br /> Sannella Pier 04/15/1999 NA NA NA NA NA NA NA 1390 1130 260 NA <br /> Sannella Pier 0712711999 NA NA NA NA NA NA NA 1390 1085 305 NA <br /> Sannella Pier 10/28/1999, NA NA NA NA NA NA NA 1390 1061 329 NA <br /> Sannella Pier 101/28/20001 NA I NA I NA I NA I NA NA NA 1390 1118 272 NA <br /> Abbreviations <br /> i <br /> TPPH =Total petroleum hydrocarbons as gasoline by modified EPA Method 82606, prior to July 27,2001,analyzed by EPA Method 8015 <br /> BTEX=Benzene,toluene,ethylbenzene,xylenes by EPA Method 82608,pnor to July 27,2001,analyzed by EPA Method 8020 <br /> MTBE=Methyl-tertiary-butyl ether <br /> TOC=Top of Casing Elevation <br /> SAH=Separate-Phase Hydrocarbons <br /> GW=Groundwater <br /> ug1L=parts per billion <br /> ms1=Mean sea level <br /> ft=Feet <br /> <n=Below detection limit <br /> D=Duplicate sample <br /> NA=Not applicable <br /> I <br /> Page 21 <br />