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i *e 1 • <br /> Groundwater Monitoring Data and Analytical Results <br /> Tosco (Circle K) Unit#1205 <br /> 16470 Cambridge Street <br /> Lathrop, California <br /> EXPLANATIONS. <br /> Groundwater monitoring data and laboratory results prior to January 25, 1999, were compiled from reports prepared by Pacific Environmental Group, Inc <br /> TOC = Top of Casing B = Benzene ppb = Parts per billion <br /> DTW = Depth to Water T = Toluene ND = Not Detected <br /> (ft) = Feet E = Ethylbenzene - = Not Measured/Not Analyzed <br /> GWE = Groundwater Elevation X = Xylenes <br /> TPH(G) = Total Petroleum Hydrocarbons as Gasoline MTBE = Methyl tertiary butyl ether <br /> i a <br /> * TOC elevations have been surveyed relative to the San Joaquin County Benchmark No UV-34 <br /> i Laboratory report indicates gasoline and unidentified hydrocarbons C6-C12 <br /> 2 Detection limit raised Refer to analytical results <br /> s MTBE by EPA Method 8260 <br /> I <br /> I <br /> 1205 xls/180183 2 As of 01/25/99 <br />