Vapor Intrusion Audits

The following letter was prepared by Janine Commerford, Assistant Commissioner, MassDEP Bureau of Waste Site Cleanup, and published in the February, 2009 LSP Association Newsletter, http://www.lspa.org.


Vapor Intrusion Audits

Identifying and Mitigating Unacceptable Impacts to Indoor Air

MassDEP’s Bureau of Waste Site Cleanup is undertaking an evaluation of conditions at certain sites with Response Action Outcomes filed prior to April 2006, where the concentration of PCE (tetrachloroethylene) in groundwater may exceed the current GW-2 standard, to determine whether there may be vapor intrusion into nearby occupied buildings. Conditions at these sites may in fact be safe, but in light of the health concerns related to ongoing exposures to volatile chemicals in indoor air, MassDEP considers it necessary to determine whether vapor intrusion is occurring. Continue reading

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