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TABLE I <br /> WELL CONCENTRATIONS <br /> Former Shell Service Station <br /> 1267 Country Club <br /> Stockton,CA <br /> WIC# 204-7524-0204 <br /> l i <br /> Measured Corrected SP TPPH TEPH B T E X MTBE Methanol Comments <br /> Sample GW Depth GW Elev 1 <br /> De th(ft} ft) ft) (ft) (u ) (ug/L) (u ) (u L) (u L) (u ) (u ) (u L) J <br /> �I 11 <br /> 06-May-98 1141 -611 000 <50 <50 <0 50 <050 I <0 50 <0 50 <2 5 NA <br /> 12-Aug-98 1263 -733 000 <50 <50 <0 50 <0150 <0 50 <0 50 <25 <1000 Oxygenate Compounds by EPA 8260 ND <br /> 10-Nov.98 14,10 •8 80 0 00 <50 130 <75-07G—,50_j_<0_50 <0 54 <25 NA <br /> 31 11 <br /> S-5 Top of Casing Elevation ft 364 <br /> 26-Feb-98 1193 -829 000 <50 <50 <0 50 <050 <0 50 _<0 50 <25 NA Oxygenate Compounds b°EPA 8260 ND <br /> 06-May-98 1001 -637 000 <50 <50 <0 50 <6'50 <0 50 <0 50 <2 5 NA <br /> 12-Aug-98 1130 -766 000 150 <50 <0 50 <6150 <0 50 <0 50 <2 5 <1000 Oxygenate Compounds by EPA 8260 ND <br /> 10-Nov-98 1265 -901 000 <50 <50 <0 50 <W50 <0 50 <0 50 <2 5 NA <br /> 9E 11 <br /> S-6 Top of Casing Elevation ft 400 <br /> 26-Feb-98 1243 -843 0 00 <50 <50 <0 50 <0150 <050 <0 50 <2 5 NA Oxygenate Compounds b"EPA 8260 ND <br /> 06-May-98 1041 -641 000 <50 <50 <0 50 <01150 <0 50 <0 50 <2 5 NA 11 <br /> 12-Aug-98 11 68 -768 000 <50 <50 <0 50 <01i50 <0 50 <0 50 <2 5 <1000 Oxygenate Compounds by EPA 8260 ND <br /> 10-Nov-98 1300 -900 000 <50 <50 <0 50 1 -<G 50 <Q50 <0 50 <2 5 NA <br /> Notes �I <br /> TPPH=Total Purgeable Petroleum Hydrocarbons carbon range C6-C12 by M7odified EPA Method 8015 <br /> TEPH=Total Extractable Petroleum Hydrocarbons carbon range C6-C12 by Modified EPA Method 8015 <br /> BTEX =benzene,toluene,ethylbenzene,xylene by EPA Method 8020 <br /> MTBE=methyl-terliary-butyl ether by EPA Method 8020 <br /> NA=Not analyzed or not available <br /> N0=Not detected <br /> <X=Not detected at detection limit of X <br /> Oxygenates= tertiary-butanol(TBA),methyl-tertiary-butyl ether(MTBE) di-isopropyl ether(DIPE),ethyl-tertiary butyl ether(ETRE), <br /> 240 090 • <br />