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I.E I • <br /> WELL CONCENTRATIONS <br /> Shell-branded Service Station _ <br /> 3725 Tracy Boulevard <br /> Tracy, California <br /> WIC #204-7884-0901 <br /> Sample Measured Corrected SP TPPH BT E X MTBE Methanol Comments <br /> GW Depth GW Elev <br /> Date (ft) (ft) (ft) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> i <br /> 15-Feb-94 999 8830 000 <50 <0 5 <0 5 <0 5 <0 5 NA NA <br /> 23-Feb-95 962 8867 000 <50 <0 5 <0 5 <0 5 <0 5 NA NA <br /> 29-Feb-96 852 8977 000 <50 <0 5 <0 5 <0 5 <0 5 NA NA <br /> 30-Apr-96 1001 8828 000 <50 <0 5 <0 5 <0 5 <0 5 NA NA <br /> 20-Aug-96 I 11 16 8713 000 <50 <0 50 <0 50 I <0 50 <0 50 30 NA <br /> 07-Feb-97 894 8935 000 <50 <0 50 <0 50 <0 50 <0 50 <2 5 NA <br /> 05-Jun-97 1046 8783 000 <50 <0 50 <0 50 <0 50 <0 50 <2 5 NA <br /> 27-Aug-97 1081 8748 000 <50 1 1 <0 50 <0 50 <0 50 <2 5 NA <br /> 19-Nov-97 1042 8787 000 I <50 <0 50 <0 50 <0 50 <0 50 <2 5 <1000 Oxygenate Compounds by 8260 ND <br /> 11-Feb-98 762 9067 0 00 <50 <0 50 <0 50 <0 50 <0 50 40 <1000 <br /> 20-May-98 925 8904 T_..000 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <1000 <br /> Abbreviations, <br /> NA=Not Analyzed or not available <br /> <x= Not detected at detection limit of x . <br /> (DUP)=Duplicate sample <br /> TPPH=Total Purgeable Petroleum Hydrocarbons carbon range C6 to C 12 by EPA Method 8015(Modified) <br /> (previously reported as Total Petroleum Hydrocarbons as Gasoline) <br /> BTEX=benzene,toluene,ethylbenzene, and xylenes by EPA Method 8020 <br /> MTBE= methyl-tertiary-butyl ether by EPA Method 8020 <br /> SP= Separate Phase hydrocarbon <br /> Notes <br /> =The original wells, MW-1 through MW-3,were decommissioned in July 1990 during station reconstruction <br /> They were replaced by MW-1A through MW-3A in August 1990 <br /> 240-0813 4 <br />