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WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 341 East Main Street <br /> Ripon, CA <br /> MTBE MTBE Depth to Depth GW SPH DO <br /> Well ID Date TPPHLTEPH B T E X 8020 8260 TOC Wateryto SPH Elevation Thickness Reading <br /> u 1L u IL u IL u IL u IL u /L u IL MSL ft. it ft. MSL ft. m <br /> i <br /> EW.2 01/07/2002 55 NA <0.50 <0.50 <0.50 <0.50 NA 1 <0.50 1 63.14 31.54II NA 31.60 NA 1 6.3 <br /> EW-2 04/15/2002 <50 NA <0.50 <0.50 <0.50 <0.50 NA <0.50 63.14 31.1211 1 NA 32.02 NA 2.9 <br /> EW-2 07/23/2002 <50 NA <0.50 <0.50 <0.50 <0.50 NA <0.50 67.80 32.1911 1 NA 35.61 NA 2.8 <br /> Abbreviations; <br /> TPPH=Total petroleum hydrocarbons as gasoline by EPA Method 82608; prior to July 10,2001,analyzed by EPA Method 8015. <br /> TEPH=Total petroleum hydrocarbons as diesel by modified EPA Method 8015. <br /> BTEX=Benzene,toluene,ethylbenzene,xylenes by EPA Method 8260B; prior to July 10, 2001, analyzed 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 /> i <br /> DO=Dissolved Oxygen <br /> ug1L=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 /> I <br /> i <br /> P 0 <br />