Environmental

In South Dakota, a 'vapor intrusion' concern in real estate refers to:

AWater intrusion through basement walls
BMigration of volatile chemicals from contaminated soil/groundwater into buildings through foundations✓ Correct
CRadon intrusion from bedrock
DNatural gas leaks from utility lines

Explanation

Vapor intrusion occurs when volatile contaminants (chlorinated solvents, petroleum hydrocarbons) in soil or groundwater beneath a building vaporize and migrate through the foundation into indoor air.

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