Vapor intrusion

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Vapor intrusion (VI) is a process by which chemicals in soil or groundwater migrate to indoor air above a contaminated site. Vapor Intrusion[1] is an emerging concept,[1] the United States Environmental Protection Agency having only issued a draft guidance on the subject in 2002.[2] On June 1, 2010, ASTM International released the "Standard Guide for Vapor Encroachment Screening on Property Involved in Real Estate Transactions," (ASTM E 2600-10).[3]

In the United States, vapor intrusion [1] is handled in individual states in different ways. One of the most scrupulous guidance documents on vapor intrusion in the nation is from the New York Department of Health.[4]

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