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Table 1 <br /> Groundwater Monitoring Data and Analytical Results <br /> Tosco(Circle K)Unit#01205 <br /> 16470 Cambridge Street <br /> Lathrop,California <br /> EXPLANATIONS <br /> I <br /> Groundwater monitoring data and laboratory analytical results prior to January 25, 1999,were compiled from reports prepared by Pacific Environmental Group,Inc <br /> i <br /> TOC=Top of Casing TPH-G=Total Petroleum Hydrocarbons as Gasoline (ppb)=Parts per billion <br /> (ft)=Feet B=Benzene ND=Not Detected <br /> DTW=Depth to Water T=Toluene _ <br /> =Not Measured/Not Analyzed <br /> S I =Screen Interval E=Ethylbenzene <br /> (ft bgs)=Feet Below Ground Surface X=Xylenes <br /> GWE=Groundwater Elevation MTBE=Methyl tertiary butyl ether <br /> TOC elevations have been surveyed relative to the San Joaquin County Benchmark No UV-34 <br /> Laboratory report indicates gasoline and unidentified hydrocarbons C6-C12 <br /> Z Detection limit raised Refer to analytical reports <br /> MTBE by EPA Method 8260 <br /> Laboratory report indicates gasoline and unidentified hydrocarbons>Cl 0 <br /> � S <br /> 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 R <br /> Laboratory report indicates weathered gasoline C6-C12 <br /> 9 i Laboratory report indicates hits confirmed past EPA recommended hold time <br /> i0 Laboratory indicates sample was analyzed outside of the EPA recommended holding time <br /> ii Well development performed <br /> I <br /> i <br /> I <br /> I <br /> I <br /> i <br /> 01205 xls 0183 A*29102, <br /> I <br />