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I <br /> WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 3725 South Tracy Boulevard <br /> �I I Tracy, CA <br /> I [Wic #204-7884-0901 <br /> MTBE MTBE Depth to GW SPH DO <br /> Well ID Date TPPH TE.PH B T]� I E X 8020 8260 TOC Water Elevation Thickness Reading <br /> (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (MSL) (ft ) (MSL) (ft } (ppm) <br /> 1 'f it 1 <br /> MW-3A* 02/07/1997 <50 NA <0 50 <0 50 1,<0 50 <0 50 <25 NA 9829 894 8935 000 NA <br /> MW-3A* 06105/1997 <50 NA <0 50 <0 50 1;<0 50 <0 50 <2 5 NA 9829 1046 8783 000 NA <br /> MW-3A* 08127/1997 <50 NA 1 1 <0 50 j'<0 50 <0 50 <2 5 NA 9829 1081 8748 000 NA <br /> MW-3A* 11/19/1997 <50 IJA <0 50 <0 50 k 50 <0 50 <2 5 <2 0 9829 1042 8787 000 NA <br /> MW-3A* 02/11/1998 <50 IJA <0 50 <0 50 [<0 50 <0 50 40 NA 9829 762 9067 000 NA <br /> MW-3A* 05/20/1998 <50 IJA <0 50 <0 50 [<0 50 <0 50 <2 5 NA 9829 925 8904 000 NA <br /> MW-3A. 08/13/1998 <50 NA <0 50 ; <0 80 1'<0'50 <0 50 <2 5 NA 9829 1065 8764 000 NA <br /> MW-3A* 11/24/1998 <50 I4A <0 50 , <050 <0 50 I <0 50 27 NA 9829 10 79 8750 000 NA <br /> MW�M* 0310511999 <50 IVA <0 50 <0 50 <0 50 1 <0 50 <2 5 NA 9a29 1007 $822 0 00 NA <br /> Abbreviations i II <br /> i <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 /> i <br /> BTEX =benzene, toluene, ethylbenzene,xylenes by EPA Method 8020 <br /> MTBE = methyl-tertiary-butyl ether f I <br /> TOC=Top of Casing Elevation it <br /> SPH = Separate-Phase Hydrocarbons l <br /> GW= Groundwater l <br /> DO= Dissolved Oxygen I j <br /> ug/L= parts per billion <br /> msl= Mean sea level <br /> l i <br /> ft= Feet <br /> <n= Below detection limit <br /> D= Duplicate sample <br /> i I <br /> s PS4 <br />