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f <br /> WELL CONCENTRATIONS <br /> Shellbranded Service Station <br /> 141 North EI Dorado <br /> Stockton, CA <br /> Pic #204.7524.1509 <br /> 11 MTBE MTBEDepth to GW SPH <br /> Well ID Date TPPH B T E X 8020 8260 TOC Water Elevation Thickness DO Reading <br /> u IL u IL u /L JAILL u l u IL u IL MSL ft MSL ft m <br /> i <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 toll oelutmg compounds <br /> MTBE=methyl-tertEary-butyl ether b=Analysis run one day past recommended hold time, <br /> l <br /> TOC 1 Top Of Casing Elevation c=Sample was analyzed outside of EPA re <br /> SPH-Separate-Phase Hydrocarbons commended hold time � <br /> GW-Groundwater <br /> 00-Dissolved Oxygen <br /> ug/L=parts per billion <br /> Ppm=parts per million <br /> msl 5 Mean sea level <br /> ft=Feet <br /> <n-Below detection limit <br /> nln=Pre-purge/Post-purge DO reading <br /> D-Dupllcate sample <br /> NA-Not applicable <br /> Pa a 14 ` <br />