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a <br /> Report•Groundwater-quality Monitoring—June 23-28,2005. 7500 West Eleventh Street,Tracy, CA. Page 19 <br /> 5.0 CONCLUSIONS <br /> Based on the data obtained from the groundwater-quality monitoring round conducted at <br /> the 7500 West Eleventh Street site in June 2005 and its integration with the data gathered <br /> cumulatively over the seven-year period since December 1998 when investigations were <br /> initiated at this site, SJC concludes the following. <br /> 1. The plumes of water affected by releases of fuel hydrocarbons that were released <br /> at the former fueling station at 7500 West Eleventh Street remain stable. <br /> 2. Although its amplitude above the local groundwater table had been reduced by <br /> approximately 1.0 ft., a groundwater mound centered near Monitoring Well MW- <br /> 16 that was first observed in February 2005 had not dissipated by the time depth <br /> to groundwater measurements were made during the June 2005 monitoring round. <br /> .3 3. Concentrations of components of fuel hydrocarbons within the plumes of affected <br /> continuing to oscillate around a downward trend. <br /> groundwater are <br /> d. A minor, 0.02 ft. thickness of floating product (LNAPL) was present on the <br /> groundwater in Monitoring Well MW-7 in June 2005. <br /> 5. No concentrations of any components of fuel hydrocarbons were detected in <br /> r `s samples recovered from any of the three wells currently included in the potable <br /> water supply monitoring program. <br /> i <br /> sic <br />