A Material Milestone For Vapor Intrusion

Law360, New York (May 1, 2013, 1:10 PM EDT) -- Eleven years after releasing an initial draft, the U.S. Environmental Protection Agency has finally issued for public comment its proposed vapor intrusion guidance documents: the “Final Guidance for Assessing and Mitigating the Vapor Intrusion Pathway from Subsurface Sources to Indoor Air” (VI guidance) and the “Guidance for Addressing Petroleum Vapor Intrusion at Leaking Underground Storage Tank Sites” (petroleum VI guidance).

While providing more certainty as to how to investigate and assess vapor intrusion, the guidance could significantly increase remediation costs, add more uncertainty to business transactions and cause regulators to reopen sites where cleanup had previously been declared closed.

VI Guidance...

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