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I II I I WELL CONCENTRATIONS Shell-branded Service Station 3725 South Tracy Boulevard Tracy, CA IWllc #204-7884-0901 MTBE MTBE Depth to GW 5PH DO Well ID Date TPPH TEPH B T f E X 8020 8260 TOC Water Elevation Thickness IT (uglL) {un/L) (uglL} (uglL) {uglL) (uglL) {uglL1 1-11 1 (MSL) {ft ) (MSL) (ft ) {(ppm) MW-3A* 04/30/1996 <50 NA <0 5 <06 ;,<0'5 <0 5 NA NA 9829 1001 8828 000 NA MW-3A* 08/20/1996 <50 PJA <0 50 <0 50 !<0 50 <0 50 30 NA 9829 1116 87 13 - 000 NA MW-3A* 02/07/1997 <50 NA <0 50 <0 50 I<0 50 <0 50 <2 5 NA 9829 894 8935 000 NA MW-3A* 06/05/1997 <50 NA <0 50 <0 50 ,<0 50 <0 50 <2 5 NA 9829 1046 8783 000 NA MW-3A* 08/27/1997 <50 NA 11 <0 50 I<0 50 <0 50 <2 5 NA 9829 1081 8748 000 NA MW-3A* 1 111 911 997 <50 NA <0 50 i <0 50 �<0 50 <0 50 <2 5 <2 0 9829 1042 8787 000 NA MW-3A* 02/11/1998 <50 PIA <0 50 11 <050 I<0 50 <0 50 40 NA 9829 762 9067 000 NA MW-3A* 05/20/1998 <50 I NA <0 50 1 <0 50 I<0 50 <0 50 <2 5 NA 9829 925 8904 000 NA MW-3A* 08/13/1998 <50 NA <0 50 <0 50 I<0 50 <0 50 <2 5 NA 9829 1065 8764 000 NA MW-3A* 1112411998 <50 NA <0 50 <0 50 I<0 50 <0 50 27 NA 9829 1079 8750 000 NA MW-3A* 03/0511999 <50 NA <0 50 <0 50 I<0 50 <0 50 <2 5 NA 9829 1007 8822 000 NA MW-3A* 06/0111999 <50 0isfA <0 500 <0 500 <0 500 <0 500 <5 00 NA 9B 29 10 64 8775 000 NA li F Abbreviations If TPPH=Total petroleum hydrocarbons as gasoline by modified EPA Method 8015 TEPH=Total petroleum hydrocarbons as diesel by modified EPA Method 1180115 8TEX= benzene,toluene, ethylbenzene,xylenes by EPA Method 8020 II MTBE = methyl-tertiary-butyl ether I I I TQC=Top of Casing Elevation 0 SPH =Separate-Phase Hydrocarbons GW= Groundwater I , DO= Dissolved Oxygen uglL= parts per billion msl = Mean sea level ft= Feet <n= Below detection limit I I Pa 4 I