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i • • <br /> 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 />' Sample DO TPHg Benzene Toluene Ethylbenzene Xylenes MtBE <br /> Well ID Date (ppm) (ppb) (ppb) (ppb) (ppb) b (ppb) <br /> U-10(con't) 05/20103 ---- 200 2.4 <0.50 <0.50 <0.50 6.6 <br /> 05127-301031'' ---- 140 1.5 1.4 <0.50 1.6 4.910.76131 � <br /> 06/20/03 ---- 130 1.3 <0.50 <0.50 0.71 4.2 <br /> 07/22/03 ---- 130 0.69 <0.50 <0.50 0.59 <2.0 <br /> 08/22/03 ---- 700 6.7 4.7 8.5 5.6 <2A <br /> 8126-29103"' ---- <50 <0.50 <0.50 <0.50 <0.50 <2.0/<0.50"' <br /> I 09/18/03 ---- <50 <0.50 <0.50 <0.50 <0.50 <0.50 <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 ter'-butyl ether <br /> ppm=parts per million <br /> ppb=parts per billion <br /> . i <br /> Notes- <br /> 1''Wells purged prior to sampling. <br /> 12'Laboratory report indicates gasoline C6-C12. <br /> 131 MtBE by EPA Method 8260. <br /> 141 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 /> 240042.11-3 14 <br /> I <br />( <br /> i <br />