April 17, 2013  The U.S. Environmental Protection Agency (EPA) has issued its Guidance for Addressing Petroleum Vapor Intrusion at Leaking Underground Storage Tank Sites. The guidance, which can be found at: http://www.epa.gov/oust/cat/pvi/petroleum-vapor-intrusion-review-draft-04092013.pdf  has been issued for external review.  EPA is accepting comments until May 24, 2013.