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L Inhalation of chemicals volatilizing from soil or groundwater to indoor or outdoor air • (onsite or offsite residential, commercial, or industrial receptors or construction yr workers); • Dermal contact with or incidental ingestion of contaminated groundwater from a 4 potential current or future water supply well (onsite or offsite residential, commercial, or industrial receptors or construction workers); and �., • Dermal contact with or incidental ingestion of contaminated surface water (offsite residential, commercial, or industrial receptors or construction workers). With the exception of one sample and due to the presence of a paved surface and the depth of residual impact (greater than 5 feet BGS), occupants will not be subject to direct exposure a� (ingestion or dermal contact) to residual petroleum hydrocarbons in soil for current land use at the Site. Sample AA -1563, collected at approximately 3.25 feet below the former fuel island, contained an elevated concentration of TPH-d (520 mg/kg). However, soil samples collected at approximately 5 and 8 feet BGS from boring H7 drilled in the same area did not indicate significant TPH-d impacts. The residual levels of TPH-d in near -surface soil (approximately 3.25 BGS) at the eastern end of the former fuel island could represent a complete exposure �+ pathway for construction workers and a less likely complete exposure pathway for other site occupants. , ` Ingestion of or dermal contact with impacted groundwater at the Site is a potential human health risk for occupants. Installation of a shallow water -producing well within the contaminant plume could create a direct and complete exposure pathway. A survey of water - producing wells present in the site vicinity will demonstrate whether this exposure pathway is currently complete. As part of a future sensitive receptor survey, a well search will be �- conducted to determine whether there are any production wells in the vicinity of the Site. Construction workers may also have direct exposure to the residual contamination in groundwater if excavation and/or dewatering activities occur in the future. V The vapor intrusion pathway from impacted soil and/or groundwater to outdoor or indoor air is complete. A future soil vapor investigation and intrusion study will be performed to evaluate the potential health risks associated with exposure via inhalation of volatiles from the subsurface. L Should contaminated groundwater discharge to surface water, there would be a potentially - complete exposure pathway for offsite receptors or construction workers. As part of a future sensitive receptor survey for the Site, surface water bodies will be identified to evaluate the potential for impact from the groundwater contaminant plume. Lr 4 SL_AIR SCM and RI WP 12 V