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i <br /> WELL CONC TRATIONS <br /> Shell-branded Service Station <br /> 4315 Waterloo <br /> Stockton, California <br /> MTBE MTBE Depth to Depth to GW SPH DO <br /> Well ID Date TPPHEEPH B T E X 8020 8260 TOC Water SPH Elevation Thickness Reading <br /> (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (MSL) (ft ) (ft ) (MSL) (ft ) (ppm) <br /> MW-1 10127/1999 758 NA <0 500 <0 500 <0 500 <0 500 221 211 NA 5937 NA NA NA NA <br /> MW-1 01/06/2000 <50 0 NA <0 500 <0 500 <0 500 <0 500 168 172 NA 5811 NA NA NA NA <br /> 'fuIW=1" '04i�1'6�Wd' (I � ,�a� P 0:„ E St J 1,�Cf: l? " eta Off' M15 1 16,8 a t 3 `' [V�1 NA NA NA <br /> Abbreviations <br /> TPPH =Total petroleum hydrocarbons as gasoline by modified EPA Method 8015 <br /> TEPH =Total petroleum hydrocarbons as diesel by modified EPA Method 8015 <br /> BTEX= benzene, toluene, ethylbenzene, xylenes by EPA Method 8020 <br /> MTBE= methyl-tertiary-butyl ether <br /> TOC=Top of Casing Elevation <br /> SPH =Separate-Phase Hydrocarbons <br /> GW=Groundwater <br /> DO= Dissolved Oxygen <br /> ug/L= parts per billion <br /> ppm= parts per million <br /> msl = Mean sea level <br /> ft= Feet <br /> <n= Below detection limit <br /> NA=Not applicable <br /> Page 1 <br />