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� r <br /> T� 1 <br /> Groundwater Monitoring ata and Analytical Results <br /> Former Tosco (Unocal) Service Station 114409 <br /> 1502 N El Dorado Street <br /> Stockton, California <br /> EXPLANATI Ns <br /> TOC=Top of Casing B=Benzene ppb=Parts per billion <br /> DTW=Depth a Water T=Toluene ND=Not Detected <br /> (ft)=Feet E=Ethylbenzene - =Not Measured/Not Analyzed <br /> GWE=Groun Jwater Elevation X=Xylenes <br /> msl=Relative to mean sea level MTBE,=Methyl tertiary hutyl ether <br /> TPH(G)=Tot I Petroleum Hydrocarbons as Gasoline <br /> • TOC elev tions have been surveyed relative to mean sea level(ms])per the City of Stockton Benchmark No 23(Elevation= 11 14 feet msl),NGVD 29 <br /> i MTBE by EPA Method 8260 <br /> 44M xls1#1802 I8 2 As of 01/05100 <br />