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WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 141 North EI Dorado <br /> Stockton, CA <br /> Wic #204-7524-1509 <br /> MTBE MTBEDepth to GW SPH <br /> Well ID Date TPPH B T E X 8020 8260 TOC Water Elevation Thickness DO Reading <br /> u L u IL u IL u IL u IL u IL u IL MSL ft MSL ft m <br /> Abbreviations Notes <br /> TPPH=Total petroleum hydrocarbons as gasoline by modified EPA Method 8015 "= MTBE could not be determined due to coelution with t-1,2-DCE <br /> BTEX=benzene,toluene, ethylbenzene,xylenes by EPA Method 8020 a= MTBE could not be determined due toy coeluting compounds <br /> MTBE= methyl-tertiary-butyl ether b=Analysis run one day past recommem led hold time <br /> TOC=Top of Casing Elevation c=Sample was analyzed outside of EPA recommended hold time <br /> SPH=Separate-Phase Hydrocarbons <br /> GW=Groundwater <br /> DO= Dissolved Oxygen <br /> ug/L=parts per billion <br /> ppm=parts per million <br /> msi= Mean sea level <br /> ft= Feet <br /> <n=Below detection lima <br /> n/n= Pre-purge/Post-purge DO reading <br /> D= Duplicate sample <br /> NA=Not applLcable <br /> • P614 <br />