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1 <br /> • Only isolated detections of volatile organic compounds (VO( <br /> BTEX compounds)are present in subsurface soils Because <br /> 1 limited detections, the migration of these compounds from so._,` <br /> is not expected to represent a significant exposure pathway for _ <br /> commercial/industrial workers <br />' However, construction workers or others involved in intrusive subsurface <br /> activities at the former tank sites may be exposed to residual constituents <br />' in subsurface soils Under this scenario, exposure may occur via the <br /> following routes <br />' • Incidental ingestion, <br /> • Dermal contact, <br /> • Inhalation of VOCs released from soils that are exposed during <br /> excavation or other intrusive activities, and <br />' • Inhalation of fugitive dust released from exposed soil (non-volatile <br /> compounds only, as there are no non-volatile compounds present in <br /> soil, this pathway will not be evaluated further) <br /> 5.2.3 Ground Water <br /> For the site, the only realistic ground water exposure pathway involves <br /> the inhalation of VOCs that may be released from the water table into <br /> ambient air Such exposures may occur under current conditions (when <br /> the depth to ground water averages 4 5 to 7 5 feet bgs), and during <br /> construction activities (when the depth to ground water may be less than <br />' 1 foot bgs) <br />' Other potential exposure pathways related to ground water were not <br /> considered to be realistic for these sites, as explained below <br />' • Shallow ground water in the vicinity of the former tank sites is not <br /> used for water supply Further, due to the adjacent commercial/ <br /> industrial facilities and ongoing remediation at neighboring properties, <br />' beneath which contaminated ground water persists, it is unlikely that <br /> shallow ground water in the vicinity will be used as a water supply in <br /> the foreseeable future Thus, exposures associated with residential and <br />' industrial use of ground water are not realistic for the former tank <br /> sites <br />' • Impacted ground water is confined to a small area in the immediate <br /> vicinity of the former tanks This observation is based on the ground <br /> water monitoring performed at the tank sites Thus, the migration of <br /> ground water to adjacent surface water bodies and the migration of <br />' ERM 20 HEINZ USA 3374 60.3/27/60 <br />