Environmental

In Michigan, 'vapor intrusion' is a concern when:

ASteam pipes beneath a building break
BVolatile contaminants in soil or groundwater migrate as vapors into overlying buildings through foundation cracks and penetrations✓ Correct
CA building's HVAC system malfunctions
DRadon from above-ground sources enters through windows

Explanation

Vapor intrusion occurs when volatile organic compounds from contaminated soil or groundwater beneath a property vaporize and seep into the building through foundation openings, potentially accumulating to harmful levels. EGLE and EPA have guidance on evaluation and mitigation.

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