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i <br /> T: lca • <br /> Groundwater Monitoring DaRd Analytical Results <br /> Former Tosco(Unocal)Service Station#4409 <br /> 1502 North El Dorado Street <br /> Stockton,California <br /> { <br /> EXPLANATIONS <br /> TOC=Top of Casing TPH-G=Total Petroleum Hydrocarbons as Gasoline (ppb)=Parts per billion <br /> DTW=Depth to Water B=Benzene ND=Not Detected <br /> (ft)=Feet T=Toluene --=Not Measured/Not Analyzed <br /> S I =Screen Interval I;=Ethylbenzene <br /> (ft bgs)=Feet Below Ground Surface X=Xylenes <br /> GWE=Groundwater Elevation MTBE=Methyl tertiary butyl ether <br /> (msl)=Mean sea level <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 /> ' MTBE by EPA Method 8260 <br /> 2 Laboratory report indicates gasoline C6-C12 <br /> ° Laboratory report indicates weathered gasoline C6-Cl2 <br /> Well development performed <br /> 5 Detection limit raised Refer to analytical reports <br /> 4409 x1s/#180238 4 As of 07/05/01 <br />