Vapor Intrusion Technical Guidance

NOTE:     This page contains some relevant information on the development of EPD’s Vapor Intrusion Technical Guidance.  However, some of the information may be outdated since recent development of a draft guidance document. 

                Click the following link to access EPD’s Guidance for Evaluating the Vapor Intrusion Exposure Pathway

Contact: Jill Clark 470-524-0314  [email protected]

EPD Contacts

For vapor intrusion questions related to a particular regulated site, stakeholders (e.g., property owners, consultants, attorneys, and the general public) should contact the specific EPD regulatory program overseeing the site.  The EPD compliance officer assigned to the site should be the first point of contact.  For EPD Land Protection Branch contact information by regulatory program,

  click here.

EPD welcomes feedback from stakeholders regarding the content of this webpage. Please email suggestions and comments to Jill Clark with “Vapor Intrusion Webpage Comments” as the subject.

For Underground Storage Tank (UST) and petroleum-related vapor intrusion guidance, please visit the UST Corrective Action webpage:https://epd.georgia.gov/ust-corrective-action

Reference Documents

• Technical Guide for Assessing and Mitigating the Vapor Intrusion Pathway from Subsurface Vapor Sources to Indoor Air (USEPA 2015a)
• Technical Guide for Addressing Petroleum Vapor Intrusion at Leaking Underground Storage Tank Sites (USEPA 2015b)
• Petroleum Vapor Intrusion: Fundamentals of Screening, Investigation, and Management (ITRC 2014)
• Conceptual Model Scenarios for the Vapor Intrusion Pathway (USEPA 2012a)
• EPA’s Vapor Intrusion Database: Evaluation and Characterization of Attenuation Factors for Chlorinated Volatile Organic Compounds and Residential Buildings (USEPA 2012b)
• Background Indoor Air Concentrations of Volatile Organic Compounds in North American Residences (1990–2005): A Compilation of Statistics for Assessing Vapor Intrusion (USEPA 2011a)
• Petroleum Hydrocarbons And Chlorinated Hydrocarbons Differ In Their Potential For Vapor Intrusion (USEPA 2011b)
• Indoor Air Vapor Intrusion Mitigation Approaches (USEPA 2008)

In the event of conflicting information, preference will generally be given to the most recent USEPA documentation.

Assessment Tools

• Vapor Intrusion Screening Level Calculator and User's Guide
• Interstate Technology Regulatory Council, Vapor Intrusion Toolkit