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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 /> {ug/L.) {ug/L {ug/L} ug/L uglL) (ug/L) (uglL) ug/L (MSL) (ft } ft (MSL {ft) {ppm} <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbonsias gasoline by modified EPA Method 8015 <br /> TEPH=Total petroleum hydrocarbonsias 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 /> i <br /> msi=Mean sea level <br /> ft= Feet <br /> <n=Below detection limit <br /> *MTBE by EPA Method18260 omitted due to lab error <br /> Analysis run out of recommended hold time due to lab error <br /> i <br /> Page 2 <br />