Environmental

What is 'vapor intrusion' in the context of Delaware environmental site assessments?

ARadon gas entering through basement walls from soil

BThe migration of volatile chemicals from contaminated soil or groundwater into overlying buildings as vapor✓ Correct

CThe evaporation of surface water affecting indoor humidity

DThe infiltration of outdoor air pollutants into a building

Explanation

Vapor intrusion is the migration of volatile organic compounds (VOCs) from contaminated soil or groundwater into the air space of overlying buildings, creating potential inhalation health risks for occupants.

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