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Volatilization to Indoor Air Pathway for Environmental Professionals
Volatilization to Indoor Air Pathway for Environmental Professionals
Vapor intrusion is the process of vapors migrating from volatile chemicals in contaminated soil or ground water through subsurface soils and/or preferential pathways (such as underground utilities) and impacting the indoor air quality of any overlying buildings. The volatilization to indoor air pathway (VIAP) is the exposure pathway that evaluates the risk posed from vapor intrusion and direct volatilization.
The VIAP information linked to this web page includes specific guidance developed by EGLE, reference materials including technical resources, training opportunities, and examples of VIAP investigations completed within the state of Michigan. There is also a point of contact information for any questions you may have on the VIAP in your area.
ANNOUNCEMENTS
December 2021 Site-specific Volatilization to Indoor Air Criteria and Site-specific Target Levels Request Form
April 2021 Acute Vapor Hazards Related to a Release From An Underground Storage Tank System Addendum
March 2021 Media-Specific Volatilization to Indoor Air Interim Action Screening Levels
September 2020 Volatilization To Indoor Air Pathway Screening Levels
Work on the web site will be ongoing and new items will continue to be added.
Information
Vapor Intrusion Success Stories
Vapor Intrusion Redevelopment Sites in Michigan.