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ALE 1 • <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 B TTEX MTBE Methanol Comments <br /> GW Depth GW Elev <br /> Date (ft) (ft) (ft) (uglL) (uglL) (uglLL) (uglL) (uglL) (uglL) <br /> 14-Feb-92 952 8877 000 <50 <0 5 <0 5 <0 5 <0 5 NA NA <br /> 20-Feb-93 808 9021 000 I <50 <0 5 <0 5 <0 5 <0 5 NA NA <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 I 8977 000 <50 <0 5 I <0 5 <0 5 <0 5 NA NA <br /> i <br /> 30-Apr-96 1001 8828 000 <50 <0 5 <0 5 <0 5 <0 5 NA NA <br /> 20-Aug-96 11 16 8713 000 <50 <0 50 <0 50 <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 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <1000 Oxygenate Compounds by 8260 ND <br /> 11-Feb-98 762 9067 000 <50 <0 50 <0 50 <0 50 <0 50 40 <1000 <br /> 20-May-98 925 8904 000 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <1000 <br /> 13-Aug-98 10 65 8764 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 /> 240-0813 4 <br />