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WELL CONIkTRATIONS Shell-branded Service Station 341 East Main Street - Ripon, CA MTBE MTBEDepth to Depth GW SPH DO Well ID Date TPPH TEPH B T E u :X 8020 8260 TOC Water to SPH Elevation Thickness Reading /L u IL u IL u IL u IL us IL u /L u IL MSL ft. ft. MSL ft. m EW-2 07/21/2040 <50.0 NA <0.500 <0.500 1 <0.500 <0.500 <2.50 <1.00 64.10 29.37 NA 34.73 NA 3.7 EW-2 10/20/2000 <50.0 NA <0.500 <0.500 <0.500 <0.500 <2.50 <0.50 63.14 29.52 NA 33.62 NA 3.2 EW-2 01/03/2001 <50.0 NA <0.500 <0.500 <0.500 <0.500 <2.50 0.94 63.14 28.55 NA 34.59 NA 3.5 EW-2 04/06/2001 <50.0 NA <0.500 <0.500 <0.500 <0.500 NA <0.500 63.14 30.41 NA 32.73 NA 6.5 EW-2 07/10/2001 <50 NA <0.50 0.57 <0.50 <0.50 NA 0.72 63.14 32.30 NA 30.84 NA 6.4 EW-2 10/25/2001 <50 NA <0.50 <0.50 <0.50 <0.50 NA <0.50 63.14 32.30 NA 30.84 NA 5.8 EW-2 01/07/2002 55 NA <0.50 <0.50 1 <0.50 <0.50 NA <0.50 63.14 31.54 NA 31.60 NA 6.3 EW-2 04/15/2002 <50 NA <0.50 <0.50 <0.50 <0.50 NA <0.50 63.14 31.12 NA 32.02 NA 2.9 EW-2 07/23/2002 <50 NA <0.50 <0.50 <0.50 <0.50 NA <0.50 67.80 32.19 NA 35.61 NA 2.8 EW-2 10/09/2002 <50 NA 1.5 1.8 <0.50 1.5 NA <0.50 67.80 31.96 NA 35.84 NA 4.8 EW-2 01/07/2003 <50 NA <0.50 <0.50 <0.50 <0.50 NA 1.9 67.80 29.81 NA 37.99 NA 4.2 EW-2 44/08/2003 <50 NA 1 <0.50 1 <0.50 1 <0.50 1 <0.50 NA <0.50 1 67.80 29.25 NA 38.55 NA 5.1 Abbreviations: TPPH=Total petroleum hydrocarbons as gasoline by EPA Method 82606; prior to July 10, 2001, analyzed by EPA Method 8015. TEPH=Total petroleurri hydrocarbons as diesel by modified EPA Method 8015. STEX=Benzene, toluene,ethylbenzene,xylenes by EPA Method 826013; prior to July 10, 2001, analyzed by EPA Method 8020. MTBE=Methyl-tertiary-Duty[ether TOC=Top of Casing Elevation SPH =Separate-Phase Hydrocarbons GW=Groundwater DO=Dissolved Oxygen ug/L=Parts per billion ppm=Parts per million MSL=Mean sea level ft=Peet <n=Below detection limit NA=Not applicable i Page 11