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along with VOC degredation occurring at shallow depth that at least some of the shallow VOCs <br /> may have migrated to greater depth in the subsurface over time. <br /> A decrease in VOC concentration of one to two orders of magnitude between the WZI 1996 and <br /> Geomatrix 2006 soil gas surveys is postulated by Geomatrix(2006)to also be potentially present <br /> in the deeper soil zone but is unconfirmed by actual data. As mentioned above,degradation of <br /> VOC concentrations at deeper zones may in fact have occurred or, alternatively, the VOCs may <br /> have moved vertically further downward into the soil column with time. <br /> Current groundwater conditions at the LNC site are unknown. VOCs had clearly impacted some <br /> of the LNC site groundwater during the 1996 WZI investigation. There is high probability that <br /> VOCs still impact the underlying groundwater at the LNC site. <br /> M aWDAEavi,c—*nWXLNCIV 0152009.wpd 29 <br />