Vapor Intrusion: Opportunity for Comment with EPA
Last month, the Environmental Protection Agency published a notice for “Public Comment on the Development of Final Guidance for Evaluating the Vapor Intrusion to Indoor Air Pathway From Contaminated Groundwater and Soils (Subsurface Vapor Intrusion Guidance)” in the Federal Register. The draft of the Subsurface Vapor Intrusion Guidance was initially released for comment during 2002 and the EPA is planning on issuing final guidance by November 20, 2012.
More recently, the EPA published a Review of the Draft 2002 Subsurface Vapor Intrusion Guidance which summarized portions of the 2002 guidance requiring update. In general, the EPA noted the observed complexity and variables impacting the migration of volatile organic compounds since issuance of the initial 2002 guidance.
Comments must be submitted to the EPA by May 14, 2011. However, the EPA anticipates making another draft of the guidance available for public comment during the Spring of 2012.