You are here:
Vapor Intrusion Mitigation
In cases where the vapor intrusion pathway is determined to be complete and indoor air concentrations of volatile chemicals exceed levels of concern, it is necessary to identify and evaluate methods that are available to mitigate (reduce) or eliminate the impact of the vapor intrusion pathway. This page includes links to documents that describe a number of alternative methods and strategies for mitigation of the vapor intrusion pathway.
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.
Techniques that have been developed for mitigating radon intrusion into 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
Sites where a petroleum-based fuel such as gasoline, diesel or jet fuel has leaked from above-ground or underground storage tanks into the surrounding soil are often referred to as “petroleum sites”. While the issues and strategies associated with investigation of vapor intrusion at these sites is generally similar to other sites, there are several specialized aspects of the approaches used to evaluate petroleum sites. Resources specific to addressing vapor intrusion at petroleum sites include:
Petroleum Hydrocarbons and Chlorinated Solvents Differ in Their Potential for Vapor Intrusion (PDF) (13 pp, About PDF) (OUST, March 2012)
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.