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, <br /> WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 3725 South Tracy Boulevard <br /> - , Tracy, CA <br /> MTBE MTBE Depth to IGW SPH DO <br /> Well ID Date TPPH TEPH B T; E X 8020 8260 TOC Water Elevation Thickness Reading <br /> u IL (ug/L (ug/L (ug/L (u/L u IL u !L u IL MSL ft MSL ft m <br /> BF-1 10/24/2001 <200 NA <20 <2 0 <2 0 <2 0 NA 690 NA 920 NA NA NA <br /> BF-1 01/2312002 <50 NA <0 50 <0 50 1,<0 50 <0 50 NA 130 NA 875 NA NA NA <br /> BF-1 04/1812002 <50 NA <0 50 <050 1<0 50 <050 NA 54 1460 905 555 NA NA <br /> BF-1 07/1512002 <50 NA <0 50 <0 50 j,<0 50 <0 50 NA <5 0 1460 954 506 NA NA <br /> SUMP 11/1512000 <50 0 NA <0 500 1 <01500_t<0 500 1 <0 500 <2 50 NA NA 10 25 NA NA NA <br /> I 11 <br /> RW 06/05/2001 73 NA 1 10 1 21 ' 0 71 1 56 NA <0 50 NA 534 NA NA NA <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by EPA Method 8260B;prior to January 23, 2001, analyzed by EPA Method 8015 <br /> TEPH=Total petroleum hydrocarbons as diesel by modified EPA Method 8015 E <br /> BTEX=Benzene,toluene,ethylbenzene,xylenes by EPA Method 8260B, pnor to January 23,2001,,analyzed by EPA Method B020 <br /> MTBE= Methyl-tertiary-butyl ether <br /> TOC=Top of Casing Elevation r <br /> SPH=SeparatelPhase Hydrocarbons 'k t <br /> GW=Groundwater <br /> DO=Dissolved Oxygen - <br /> RW=Rediscovered well <br /> ug1L= Parts per billion <br /> ppm=Parts per million <br /> i <br /> MSL=Mean sea level r <br /> i <br /> ft=Feet t <br /> E <br /> <n=Below detection limit i <br /> D=Duplicate sample <br /> NA= Not applicable <br /> r <br /> P 6 <br />