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i <br /> WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 341 East Main Street <br /> Ripon, California <br /> Wic #204-6522-0307 <br /> MTBE MTBE Depth to Depth to GW SPH DO <br /> Well ID Date TPPH TEPH B T E X 8020 8260 TOC Water SPH Elevation Thickness Reading <br /> u IL uglL (uglL uglLuglL u IL u IL u IL MSL (ft '(ft) (MSL) ' (ft) ( m) <br /> EW-2 1 03/11/1999 1 <bO 0 1 NA I<U bUU I <0 5001 <0 5001 <0 5001 <2 00 1 2 91 1 NA 1 26 42 1 , <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-ternary-butyl ether <br /> TOC=Top of Casing Elevation <br /> SPH=Separate-Phase Hydrocarbons <br /> GW= Groundwater <br /> DO=Dissolved Oxygen <br /> i <br /> ug/L= parts per billion <br /> msl= Mean sea level <br /> ft=Feet <br /> <n= Below detection limit <br /> I <br /> *MTBE by EPA Method 8260 omitted due to lab error ' <br /> Analysis run out of recommended hold time due to lab error <br /> i <br /> i <br /> Page 2 <br /> i <br /> 4 i i <br /> j <br />