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! =! i <br /> WELL CONCENTRATIONS _ <br /> Shell-branded Service Station ' <br /> 341 East Main Street <br /> Ripon, California <br /> Wic #204-6522-0307 <br /> MTBE MTBE Depth to Depth to GW SPH DO <br /> Well ID Date TPHg TPHd B T E X 8020 8260 TOC Water SPH Elevation Thickness Reading <br /> (u IL) ug/L) u ILu IL (uglL) (uglL) (ug/L) (ug/L) (MSL) (ft ) (ft ) MSL (ft ) ( m) <br /> MW-1 04/28/1998 <100 NA <10 <10 <1 0 <1 0 92,000 150,000 NA 2532 NA NA NA 20 <br /> MW-1 07/28/1998 <50 NA <0 50 <0 50 <0 50 <0 50 5,200 160,000 NA 2700 NA NA NA 18 <br /> MW-1 10/07/1998 <1,000 NA <10 <1O <10 <10 130,000 130,000 NA 2736 NA NA NA 14 <br /> MW-1 1111011998 <50 NA <0 50 <0 50 <0 50 <0 50 210 NA NA 2715 NA NA NA 12 <br /> MWA 1111811998 <500 NA <5 0 1 <5 0 <5 0 <5 0 3,300 NA NA 2711 NA NA NA 13 <br /> MWA 11/24/1998 <10,000 NA <100 <100 <100 <100 130,000 130,000 NA 2727 NA NA NA 12 <br /> MW-1 12/01/1998 <50,000 NA <500 <500 <500 <500 138,000 155,000 NA 2700 NA NA NA 11 <br /> MWA 12/0811998 <10,000 NA <100 160 <100 <100 130,000 130,000 NA 2745 NA NA NA 13 <br /> MWA 1 211 711 998 <20,000 NA <200 <200, <200 <200,190,000 160,000 NA 2737 NA NA NA NA <br /> MWA 12/23/1998 <10,000 NA <100 <100 <i 00 <1001100,000, 69,000 NA 2742 NA NA NA 14 <br /> < < <5001 <500 1 <5001139,0001127,UOU <br /> Abbreviations <br /> TPHg =Total petroleum hydrocarbons as gasoline by modified EPA Method 8015 <br /> TPHd=Total petroleum hydrocarbons as diesel by modified EPA Method 8015 <br /> BTEX= benzene,toluene,ethylbenzene, xylenes by EPA Method 8020 <br /> MTBE=methyl-tertiary-butyl ether <br /> TOC=Top of Casing Elevation <br /> SPH=Separate-Phase Hydrocarbons <br /> GW=Groundwater <br /> DO= Dissolved Oxygen <br /> ug1L= parts per billion <br /> msl= Mean sea level <br /> ft= Feet <br /> <n=Below detection limit <br />