Environmental
In North Dakota, 'vapor intrusion' into buildings from underground contamination is a concern when:
AHomes are newly constructed
BSubsurface contamination (such as from petroleum or dry cleaning chemicals) vaporizes and enters buildings through foundations✓ Correct
COnly when buildings have basements
DOnly in summer months
Explanation
Vapor intrusion occurs when volatile organic compounds (VOCs) from subsurface contamination migrate upward as vapors and enter buildings through foundation cracks, sump pits, or utility penetrations. This can create indoor air quality hazards in North Dakota buildings overlying contaminated sites.
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