Title: Vapor Intrusion Focus Area 
Resource Type: web links 
Language(s): English
Producers or distributor US Environmental Protection Agency (USEPA) 
Author / Producer Type: Agency, regulator or other governmental or inter-governmental body 
Producer country: USA 
Producer or distributor web link (root): https://clu-in.org/issues/default2.focus/sec/Vapor_Intrusion/cat/Overview/
Web link for product information: https://clu-in.org/vi.  
EUGRIS Keyword(s): Contaminated land-->Risk assessment-->Exposure pathways
Contaminated land-->Risk assessment-->Receptor: Human health
Short description: Vapor intrusion refers to the migration of chemical vapors from a subsurface source, such as contaminated soil, groundwater, or utility conduit, into an overlying building or structure. Vapor-forming chemicals that potentially can provide subsurface sources for vapor intrusion include chlorinated volatile organic compounds (VOCs), such as chlorinated solvents, petroleum hydrocarbons, pesticides, polychlorinated biphenyls, elemental mercury, and per- and polyfluoroalkyl substances (PFAS). Although this issue area focuses on vapor intrusion, groundwater intrusion can be a source of vapors in indoor air. Groundwater intrusion occurs when the water table is elevated, such as following a heavy rain, and floods the lower level of a building. 
Submitted By: Professor Paul Bardos WhoDoesWhat?      Last update: 11/10/2021

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