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WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 1071 North Main Street <br /> Manteca, CA <br /> Wic#204-4728-0502 <br /> MTBE Depth to < GW D O <br /> Well ID Date TPPH B T E X 8020 MTBE 8260 TOC Water Elevation Reading <br /> (ug/L) (ug/L) (ug/L) (ug/L) ug/L) (ug/L) (ug/L) (MSL) (ft) (MSL) (mg/L) <br /> MW-3 07/22/1999 <50 0 <0 500 <0 500 1<0 500 1 <0 500 449 343 3534 1791 1 1743 13 <br /> ��MW IOIz1311999 k' 0 0� � 0500 �<0 50� <"0 500` �0 500 2 50 -CON,in 35 '4 T6_ <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by modified EPA Method 8015 <br /> BTEX= benzene,toluene,ethylbenzene,xylenes by EPA Method 8020 <br /> MTBE=methyl4ertiary-butyl ether <br /> TOC=Top of Casing Elevation <br /> GW=Groundwater <br /> ug/L= parts per billion <br /> msl=Mean sea level <br /> ft= Feet <br /> <n=Below detection limit <br /> D= Duplicate sample <br /> Notes <br /> a=Sample re-analyzed past hold time, results should be considered estimates <br /> Page 2 <br /> y <br />