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The site geology is similar to that which was encountered at the <br /> . former tank site #3, except that the upper fine-grained layer showed <br /> more pronounced variability in thickness over a relatively short <br /> distance <br /> Hydrology <br /> Investigation and tank removal activities in this area indicate the <br /> presence of confined groundwater conditions Also present is a <br /> localized perched groundwater table at approximately 4 feet below the <br /> ground surface in the vicinity of the former UST as indicated by MW- <br /> 2A In the other wells, groundwater was initially encountered at <br /> depths ranging between 6.5 feet below the ground surface at MW-1A <br /> to 19 feet below the ground surface at MW-3A. In all of the wells <br /> except for MW-2A, groundwater levels quickly rose in the casing. <br /> After equilibration of water levels, the general groundwater level was <br /> approximately 5 feet below the ground surface outside of the <br /> warehouse building <br /> At the subject site, the groundwater flow gradient appears to be <br /> toward the southeast, as indicated from measurements of on-site <br /> wells Both gradient and flow direction are influenced by water levels <br /> in the nearby Deep Water Channel that lies adjacent to the northern <br /> property line of the subject site. Tidal fluctuations :n the channel <br /> strongly affect the measured gradient. Additionally, confined aquifer <br /> conditions strongly influence the measured gradient. There are two <br /> known water supply wells within 2,000 feet of the site (Figure 1-1). <br /> E <br /> i 2-3 <br /> I <br />