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Ta . <br /> Groundwater Monitoring Data and Analytical Results <br /> Tosco (Circle K)Unit#08671 <br /> 8606 Thornton Road <br /> Stockton, Califorma <br /> Groundwater monitoring data and laboratory analytical results prior to May 14, 1999, were compiled from reports prepared by Secor International,Inc <br /> B = Benzene ppb = Parts per billion <br /> TOC = Top of Casing elevation -- = Not Measured/Not Analyzed <br /> DTW = Depth to Water T = Toluene <br /> (ft) = Feet <br /> E = Ethylbenzene ND = Not Detected <br /> GWE = Groundwater Elevation X = Xylenes <br /> msl = Relative to mean sea level MTBE = Methyl tertiary butyl ether <br /> TPH(G) = Total Petroleum Hydrocarbons as Gasoline <br /> * TOC elevations are based on City of Stockton Benchmark#9 A brass disk in monument box marking the east 114 corner of section 8 Township to North range 6 East <br /> i MTBE by EPA Method 8260 <br /> Z Laboratory report indicates gasoline C6-C12 <br /> I <br /> 08671 xis/#190198 3 As of 02107/00 <br />