Region 8

Vapor Intrusion Mitigation

Remediation of vapor intrusion impacts may be required if the vapor intrusion pathway is determined to be complete at a site and indoor air concentrations of volatile chemicals exceed levels of concern. This page includes links to resources for addressing the mitigation of vapor intrusion sites.

Mitigation of VOCs in Indoor Air

EPA Air/Superfund National Technical Guidance Study Series. Options for developing and evaluating mitigation strategies for indoor air impacts at CERCLA sites. September 1993. EPA-451/R-93-012. (PDF) (174 pp, 7.3 MB, About PDF)
This document evaluates approaches that may be used to mitigate Superfund site impacts on the indoor air quality of nearby structures.

Indoor Air Vapor Intrusion Mitigation Approaches
This is an Engineering Issue that summarizes available information on site remediation technologies and related issues regarding vapor intrusion.

Radon Mitigation

Techniques for mitigating radon in indoor air may also be used to mitigate the intrusion of VOCs into buildings.

EPA's Radon Web page contains a wealth of information on radon including links to resources and publications on mitigating radon in homes

Vapor Intrusion at Petroleum Sites

Resources specific to addressing vapor intrusion at petroleum sites include:

  • Colorado’s Petroleum Storage Tank Owner/Operator Guidance Document (PDF) (45 pp, 179 K, About PDF) (Colorado Department of Labor and Employment, Revised October 2005)
    Guidance document for assisting owners and/or operators of regulated leaking storage tank facilities in conducting release investigations, performing initial response actions, preparing site characterization reports, and preparing and implementing corrective action plans. Contains information on petroleum releases and vapor intrusion screening levels.
  • Colorado’s Petroleum Hydrocarbon Vapor Intrusion Guidance Document (PDF) (36 pp, 2.2 MB, About PDF) (Colorado Department of Labor and Employment, December 2007)
    Guidance for the regulated community on the best ways to assess the potential of the vapor intrusion pathway, including: the conditions triggering vapor intrusion assessment, construction and sampling methods for soil vapor wells and sub-slab installations, issues and challenges of indoor air evaluation and sampling, analysis of vapor samples and the evaluation of laboratory data.
  • The American Petroleum Institute (API’s) Vapor Intrusion Website
    A collection of API publications and presentations regarding petroleum vapor intrusion research, including a petroleum vapor intrusion database.

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