EPA Considers Adding Vapor Intrusion Pathway to Superfund Ranking System

For over two decades, the Environmental Protection Agency (“EPA”) has considered four exposure pathways in determining whether to list contaminated sites on the Superfund National Priorities List (“NPL”): groundwater, surface water, soil and air. In a Federal Register notice published January 31, 2011, EPA solicited public comment on the potential addition of a fifth pathway: soil vapor intrusion.

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