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. GIoundiiatet [\Iotutoltrng*a and -kiialitical Results <br /> Tosco (Circle K) Unit #/01205 <br /> 16470 Cambridge Street <br /> Lathrop, California <br /> ]EXPLANATIONS. <br /> Groundwater monitoring d iia and laboidtory itsulIs piuii to January 25, 1999, were compiled hom iepoits piepared 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 /> * TOC elevations have been surveyed relative to the San Joaquin County Benchmark No UV-34 <br /> L Laboratory report indicates gasoline and unidentified hydrocarbons C6-C12 <br /> 2 Detection limit raised Refer to analytical reports <br /> 3 MTBE by EPA Method 8260 <br /> Laboratory report indicates gasoline and unidentified hydrocarbons >C16 <br /> 5 MTBE by EPA Method 8260 analyzed past hold time by 20 minutes <br /> 6 MTBE by EPA Method 8260 analyzed past hold time by 59 minutes <br /> 7 Laboratory report Indicates gasoline C6-C12 <br /> I <br /> 01205 xtsl180183 3 As of 10121/99 <br />