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Table 1 -C-Sparge System Pilot Test Groundwater Chemical Analytical Data <br /> Former Unocal Service Station#0187 <br /> 437 East Miner Avenue <br /> Stockton,California <br /> Explanation. <br /> Wells were not purged prior to sampling <br /> DO-Dissolved oxygen,reading were taken after collection of groundwater samples <br /> TPHg=Total Petroleum Hydrocarbons as gasoline <br /> MtB1✓=Methyl tert-butyl ether <br /> ppm=parts per million <br /> ppb=parts per billion <br /> Notes. <br /> 1'1 Wells purged prior to sampling <br /> [Z]Laboratory report indicates gasoline C6-C12 <br /> j [31 MtBE by EPA Method 8260 <br /> [47 Laboratory report indicates weathered gasoline C6-C12 <br /> [51 Laboratory report indicates unidentified hydrocarbons C6-Cl2 <br /> E61 hydrocarbon pattern is present in the requested fuel quantitation range, <br /> but does not resemble the pattern of the requested fuel <br /> First ozone microsparge system began operating on December 12,2000 <br /> Second ozone microsparge system began operating on April 26,2002 <br /> 240042 11-2 12 <br />