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WELL CONSTRATIONS Former Shell Service Station 880 Victor Road Lodi, CA I MTBE MTBE Depth to GW Well ID Date TPPH B T E X 8020 8260 DIPS ETBE TAME TBA Ethanol 1,2-DCA EDB TOC Water Elevation 1 (ug/L (ug/L (un/L u /L u IL u IL u 1L u It u IL (u/L (u/L (ug/L u IL MSL P-2 10/30/2002 <500 <5 0 <5 0 -150 <5 0 NA 1 2,600 <50 <50 70 19,000 NA NA NA 5451 1 5186 265 P-2 02/19/2003 <1,000 <10 <10 <10 <10 NA 540 <10 <10 <10 13,000 NA NA NA 5451 5036 416 P-2 06/03/2003 <5,000 <50 <50 <50 <100 NA 640 <200 <200 <200 20,000 NA NA NA 5451 5066 385 P-2 08/21/2003 <10,000 <100 <100 <100 <200 NA 450 <400 <400 <400 29,000 NA NA NA 5451 5302 149 P-2 11/11/2003 NA NA NA NA NA NA 3,600 <400 <400 <400 28,000 NA NA NA 54 51 5241 210 P-2 02/0212004 I <1,000 <10 <10 <10 <20 NA 310 <40 <40 1 440 14,000 NA NA NA 5451 5122 329 Abbreviations TPPH=Total petroleum hydrocarbons as gasoline by EPA Method 82608,pnor to November 20,2000,analyzed by EPA Method 8015 BTEX=Benzene,toluene,ethylberizene,xylenes by EPA Method 82606,prior to November 20,2000,analyzed by EPA Method 8020 MTBE=Methyl-tertiary-butyl ether DIPS=DI-rsopropyl ether ETRE=Ethyl tertiary butyl ether TAME=Tertiary amyl methyl ether TBA=Tertiary butanol 1,2-DCA=1,2-Dichloroethane EDB=1,2-Dibromoethane TOC=Top of Casing Elevation GW=Groundwater ug[L=Parts per biawn MSL=Mean sea level ft=Feet <n=Below detection Iimd NA=Not applicable Notes a=This sample was analyzed outside of EPA recommended hold time Site surveyed on November 20,1999,by Virgil Chavez Land Surveying of Caldomia Site surveyed on January 4,2002,by Virgil Chavez land Surveying of Caldomia Site surveyed on September 20,2002,by Vigil Chavez Land Surveying of Cakfomia Wells MW-8 through MW-11 surveyed August 15,2003,by Virgil Chavez Land Surveying of Vallejo,Caldorrua Page 5