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• <br /> • Ta� <br /> Groundwater Monitoringwand Analytical Results <br /> r <br /> Former Tosco(Unocal)Service Station#4409 <br /> 1502 North El Dorado Street <br /> Stockton,California <br /> EXPLANATIONS <br /> TOC=Top of Casing B=Benzene (ppb)=Parts per billion <br /> DTW=Depth to Water T=Toluene ND=Not Detected <br /> (ft)4 Feet E=Ethylbenzene --=Not Measured/Not Analyzed <br /> S I =Screen Interval X=Xylenes <br /> (ft bgs)=Feet Below Ground Surface MTBE=Methyl tertiary butyl ether <br /> GWE=Groundwater Elevation <br /> (msl)=Mean sea level <br /> TPH-G=Total Petroleum Hydrocarbons as Gasoline <br /> * TOC elevations have been surveyed relative to msl,per the City of Stockton Benchmark No 23,(Elevation= 11 14 feet,msl)NGVD 29 <br /> i MTBE by EPA Method 8260 <br /> 2 Laboratory report indicates gasoline C6-C12 <br /> ' Laboratory report indicates weathered gasoline C6-C12 <br /> 4 Well development performed <br /> 5 Detection limit raised Refer to analytical reports <br /> 4409 xIs/#[80238 3 As of 04/05/01 <br />