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WELL CONCENTRATIONS <br /> Shell branded Service Station <br /> 620 West Charter Way <br /> I Stockton, CA <br /> Wic #204-7524-4305 <br /> ll <br /> MTBE MTBE Depth to GW SPH DO <br /> Well ID Date TPPH B T E X 8020 8260 TOC Water Elevation Thickness Reading <br /> (ug/L u IL (ug/L (ug/L u IL (u/L (u/L MSL ft. MSL ft. m <br /> Notes: <br /> i = Field data sheets for this event misplaced; no field measurements available for this event. <br /> `* = MTBE confirmed; Benzene did not confirm by GC/MS. <br /> a=Analysis was run past recommended hold time. <br /> b= Result was generated out of hold time. <br /> c=TPPH and STEX analyzed by EPA Method 8260B. <br /> d= Insufficient water to record measurement. <br /> When separate-phase hydrocarbons are present,ground water elevation is adjusted using the relation: <br /> Corrected ground water elevation=Top-of-casing elevation-depth to water)+ (0.$x hydrocarbon thickness). <br /> i <br /> i <br /> i <br /> Page 20 <br />