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WELL CO I NTRATIONS <br /> Shell-branded Service Station - <br /> 26Y Country Club <br /> Stockton, CA <br /> Wic ##204-7524-0204 <br /> MTBE MTBE Depth to GW Thicknes <br /> Well ED Date TPPH TEPH B T E X 8020 8260 TOC Water Elevation s <br /> (ug/L u L (u/L (u/L (u/L (u/L (u/L u IL MSL ft. MSL ft. <br /> Abbreviations: <br /> TPPH=Total petroleum hydrocarbons as gasoline by modified EPA Method 8260B;prior to January 29,2001,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 January 29,2001,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 /> 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 /> a=This sample was analyzed outside of EPA recommended hold time. <br /> Page 5 <br />