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Vapor Intrusion
Vapor Intrusion
Contact
Chemical spill questions:
800-662-9278
Department of Environment, Great Lakes, and Energy (EGLE)
Chemical exposure questions:
800-648-6942
Department of Health and Human Services (MDHHS)
Vapor intrusion sometimes occurs where chemicals were spilled, leaked, or dumped and not cleaned up.
For example, properties such as gas stations, dry cleaners, or businesses operating metal parts degreasers use chemicals like gasoline or solvents that can cause vapor intrusion. If these chemicals are mishandled and get into the ground, they can move through the soil and groundwater. Although the chemicals are often released as liquid, they easily evaporate, becoming a vapor in the air that you often cannot see or smell.
At some point, the vapors may come in contact with your home or business – usually around your basement or your floor. These vapors may get into your home through openings such as cracks, or other openings around pipes and sumps. This is a concern because you may breathe in these harmful vapors without knowing it.
What is vapor intrusion?
Watch this 2-minute video to learn what vapor intrusion is, what causes it, why it is a concern, and what can typically be done to address a vapor intrusion problem.
For homeowners
For 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 district point of contact for any questions you may have on the VIAP in your area.
Announcements
- November 20, 2023: RRD rescinds the 2021 Addendum to the 2013 guidance document
- October 11, 2023: RRD issues guidance for the evaluation of a dispersed source in urban fill
- October 3, 2023: Site-Specific target levels and Part 213 Submittals
- August 7, 2023: RRD re-issues NAPL characterization, remediation, and management for petroleum releases guidance
- April 6, 2023: RRD specifies soil gas sampling requirements for Final Assessment Reports
- March 14, 2023: RRD recommends reassessment of petroleum vapor intrusion pathway after update
Technical contacts:
Dr. Shane Morrison, Toxicology Volatilization to Indoor Air Specialist
MorrisonS5@Michigan.gov
517-230-7570
Matt Williams, Volatilization to Indoor Air Specialist
WilliamsM13@Michigan.gov
517-881-8641