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�r r r rr ■r■ rr r r r r r r ■■r r iirl■� r ■■� �■■ � <br /> Table 9 <br /> C-Sparge System Pilot Test <br /> Groundwater Chemical Analytical Data <br /> Former Unocal Service Station #0187 <br /> 437 East Miner Avenue, Stockton <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 /> MtBE = Methyl tert-butyl ether <br /> ppm= parts per million <br /> ppb= parts per billion <br /> Wells purged prior to sampling. <br /> 129 Laboratory report indicates gasoline C6-C12. <br /> X31 MtBE by EPA Method 8260. <br /> X41 Laboratory report indicates weathered gasoline C6-C12. <br /> 151 Laboratory report indicates unidentified hydrocarbons C6-C12 <br /> 161 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 /> 06946-325 1 ENSR Corporation <br /> e <br />