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I <br /> WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 341 East Main Street <br /> Ripon, California <br /> Wlc #204-6522-0307 <br /> MTBE MTBE Depth to Depth to GW SPH DO <br /> Well ID Date TPPH TEPH B T E X 8020 8260 TOC Water ISPH Elevation Thickness Reading <br /> —(UL/L—) (u /L) a /L u /L MSL} (ft ft (MSL) ft ( m <br /> EW-1 `03/11/1999 <500 ,� NA <5100 r<5 00 <5 00 1 <5_00 - 5,090 3,100 1 NA 26.60 3 INA, - _;NA,,,` NA 2 „1 0 <br /> II <br /> EW-,2, 1 03/1,1/1999,-1;<50 0r x NA I<0 5001<0 5001<0 5001<0 5001 <2 00 1 2 91 1 NA 1 26.42 aj NA 7 , .' NA - 2 6 <br /> - 3 <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 /> DO=Dissolved Oxygen <br /> ug/L=parts per billion <br /> msl=Mean sea level <br /> ft= Feet <br /> <n=Below detection limit <br /> * MTBE by EPA Method 8260 omitted due to lab error <br /> **Analysis run out of recommended hold time due to lab error <br /> i <br /> Page 2 <br /> I" <br /> 40 <br /> i <br />