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WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 341 East Main Street <br /> Ripon, CA <br /> Wic #204-6522-0307 <br /> MTBE MTBEDepth to Depth GW SPH DO <br /> Well ID Date TPPH TEPH B T E X 8020 8260 TOC Water to SPH Elevation Thickness Reading <br /> u /L u /Lu /L u IL u IL u /L u IL u /L MSL ft. ft. MSL ft. m <br /> EW-2 04117/2003 <50.0 NA <0.500 <0.500 <0.500 <0.500 2,060 2,100 64.10 27.07 NA 37.03 NA 2.5 <br /> EW-2 0712112003 <50.0 NA <0.500 <0.500 <0.500 <0.500 <2.50 <1.00 64.10 29.37 NA 34.73 NA 3.7 <br /> EW-2 101201200) <50.0 NA <0.500 <0.500 <0.500 <0.500 <2.50 <0.50 63.14 29.52 NA 33.62 NA 3.2 <br /> EW-2 01/03/2001 <50.0 NA <0.500 <0.500 <0.500 <0.500 <2.50 0.94 63.14 28.55 NA 34.59 NA 3.5 <br /> EW-2 04106/2001 <50.0 NA <0.500 <0.500 <0.500 <0.500 NA <0.500 63.14 30.41 NA 32.73 NA 6.5 <br /> EW-2 07/10/2001 <50 NA <0.50 0.57J<0.50 <0.50 NA 0.72 63.14 32.30 NA 30.14 NA 6.4 <br /> EW-2 10/25/2001 <50 NA <0.50 <0.50.50 <0.50 NA <0.50 63.14 32.35 NA 30.84 NA 5.8 <br /> EW-2 011071200`.1 55 NA <0.50 <0.50.50 i <0.50 NA <0.50 63.14 31.54 NA 31.$0 NA 6.3 <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-3utyl ether <br /> TOC=Top of Casing Elevation <br /> SPH=Separate-Phase Hydrocarbons <br /> GW=Groundwater <br /> DO=Dissolved Oxygen <br /> ug/t_=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 9 <br /> i <br />