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! ! <br /> WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 1267 Country Club <br /> Stockton, CA <br /> Wic #204-7524-0204 <br /> MTBE MTBE Depth to GW SPH <br /> Well ID Date TPPH TEPH B T E X 8020 8260 TOC Water Elevation Thickness <br /> (ug/L) (ug/L) (u IL) (u IL) ug/L) (u IL) (u IL) (ug/L) (MSL) (ft (MSL) (ft ) <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 /> ug/L= parts per billion <br /> msl= Mean sea level <br /> ft= Feet <br /> <n= Below detection limit <br /> (D)= Duplicate sample <br /> NA= Not applicable <br /> ND= Not detected at or above the minimum quantitation limits <br /> Notes <br /> * MTBE by EPA method 8260 was run out of recommended hold time, value should be considered an estimate <br /> Page 3 <br />