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s <br /> s <br /> TABLE 1 <br /> WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 2494 Fremont Street <br /> Stockton, CA <br /> WIC#204-7524-1806 <br /> Sample Measured Corrected SP TPPH B T E X MTBE MTBE Methanol Comments <br /> EPA EPA <br /> GW Depth GW Elev 8020 8260 <br /> Date (ft) (ft) ftu IL uIL u IL u !L u IL (uglL) (ug/L) (NIL <br /> S-1 Top of Caslng Elevation ft 21 33 <br /> 11-Ma -98 4982 -2848 001 NA NA NA IJA NA NA <2 0 NA <br /> 13-Aug-98 4850 -2717 000 NA NA NA 14A NA NA NA NA Pre-Development water level <br /> 19-Aug-98 4981 -2848 000 200000 5000 18000 3000 18000 <2500 NA NA Post-Develop ment water level <br /> 23-Nov-98 48,55 -27 22 000 j76000 5300 21000 2300 17000 <500 NA NA <br /> S-2 Top of Cas ng Elevation ft 2114 <br /> 11-Ma -98 4974 -2860 000 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <2 0 <1000 ND <br /> 13-Aug-98 4865 -2751 000 <50 <0 50 <0 50 <0 50 <0 50 <25 NA NA <br /> 23-Nov-98 4842 -2728 000 450 <0 50 076 <0 50 081 <2 5 NA NA <br /> S-3 Top of Cas ng Elevation ft 2148 <br /> 11-Ma -98 5008 -2860 000 <50 <0 50 <0 50 <0 50 <0 50 <2 5 NA <1000 ND <br /> 13-Aug-98 4877 -2729 0 00 <50 <0 50 <050 <0 50 <0 50 <2 5 NA NA <br /> 23-N6v98 48.65 -27.17 000 <50 061 10 <0,50 1 1 <2 5 NA NA <br /> Abbreviations. <br /> NA=Not analyzed or not available <br /> <x=Not detected at method detection limit of x <br /> TP PH=Total Purgeable Petroleum Hydrocarbons carbon range C6 to C12 by EPA Method 8015(Modified) <br /> BTEX=benzene,toluene,ethylbenzene,and xylenes by EPA Method 8020 <br /> MTBE=methyl-tertiary-butyl ether <br /> Oxygenates= tertiary-butanol(TBA),methyl-ternary-butyl ether(MTBE),di-isopropyl ether(DIPE),ethyl tertiary-butyl ether(ETBE), <br /> and tertiary-amyl methyl ether(TAME)by EPA Method 8260 <br /> 2400797 i <br />