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I� .I E WELL CONCENTRATIONS Shell-branded Service Station 3725 South Tracy Boulevard I Tracy, CA mic #204-7884-0901 - �I - MTBE MTBE Depth to GW SPH DO Well ID Date TPPH TE:PH - B T{ {; E X 8020 8260 TOC Water Elevation Thickness Reading (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (MSL) (ft) (MSL) (ft) (ppm) MW-3A 02/23/1995 <50 NA <0 5 <05 11<015 <0 5 NA NA 9829 962 8867 NA NA MW-3A 02/29/1996 <50 I NA <0 5 1 <05 J[<015 <0 5 NA NA 9829 852 8977 NA NA MW-3A 04130/1996 <50 _ NA <0 5 „ <0 5 �1<015 <0 5 NA NA 9829 1001 8828 NA NA MW-3A 08120/1996 <50 NA <0 50 <0 50 ;;<0 50 <0 50 30 NA 9829 1116 8713 NA NA MW-3A 02107/1997 <50 NA <0 50 <0 50 ;'<0 50 <0 50 <2 5 NA 9829 894 8935 NA NA MW-3A 06/05/1997 <50 NA <0 50 1 <0 50 j;<0 50 <0 50 <2 5 NA 9829 1046 8783 NA NA MW-3A 08/27/1997 X50 14A 1 1 <0 50 1'�<0 50 <050 , <2 5 NA 9829 1081 8748 NA NA MW-3A - 11/19/1997 <50 NA <0 50 h <0 50 j,<0 50 <0 50 <2 5 <2 0 9829 1042 +87 87 NA NA MW-3A 02/11/1998 X50 NA <0 50 f <0 50 1,<0 50 <0 50 40 NA 9829 762 9067 NA NA MW-3A 05/20/1998 <50 14A <0 50 r` <0 50 1;<0 50 <0 50 <2 5 NA 9829 925 8904 NA NA MW-3A 08/13/1998 X50. 14A <0 50 <0 50 I'<0 50 <0 50 <2 5 NA 9829 1065 8764 NA NA MW-3A 11/2411998 <50 NA <0 50 i' <0 50 j;<0 50 <0 50 2 7 NA 9829 '10 79 8750 NA NA MW-3A 03/05/1999 X50 14A <0 50 <0 50 j,<0 50 <0 50 <2 5 NA 9829 1007 8822 NA NA MW-3A 06/0111999 <50 0 14A <0 500 <0 500 �0 500 <0 500 <5 00 NA 9829 1054 8775 NA NA MW-3A 08/3011999 1 <50 0 IVA <0 500 <0 500 �0 500 <0 500 <2 50 NA 9829 1089 8740 NA NA l�bh i iR I� II E f II s Abbreviations TPPH=Total petroleum hydrocarbons as gasoline by modified TEPA Method 8015 TEPH=Total petroleum hydrocarbons as diesel by modified EPA Method�801f5 _ BTEX=benzene,toluene,ethylbenzene,xylenes by EPA Method 84120 MTBE=methyl-tertiary-butyl ether ! TOC=Top of Casing Elevation SPH =Separate-Phase Hydrocarbons GW=Groundwater Page 4 E t