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Vapor Intrusion at Superfund Sites
On this page:
- Vapor intrusion screening levels
- Trichloroethylene and vapor intrusion
- Community involvement and vapor intrusion
- Five-year Rreviews and vapor intrusion
Vapor Intrusion Screening Levels
EPA has developed the Vapor Intrusion Screening Level (VISL) Calculator, which is a spreadsheet tool that:
- Lists chemicals considered to be volatile and sufficiently toxic through the inhalation pathway
- Provides VISLs for ground water, soil gas and indoor air, which are generally recommended, media-specific, risk-based screening-level concentrations
The primary purpose of the VISL calculator is to assist Superfund site managers and risk assessors in determining, based on an initial comparison of site data against the VISLs: whether chemicals found in ground water or soil gas can pose a significant risk through vapor intrusion; and, if so, whether a site-specific vapor intrusion investigation is warranted.
Trichloroethylene and Vapor Intrusion
Trichloroethylene, or TCE, is a widely used industrial chemical frequently found at Superfund sites as a contaminant in soil and groundwater. Scientific evidence indicates TCE poses potential cancer and non-cancer human health hazards. EPA has compiled information (Compilation of Information Relating to Early/Interim Actions at Superfund Sites and the TCE IRIS Assessment) regarding existing EPA guidance on early or interim actions at Superfund sites where investigations of indoor air contamination identify site-related TCE concentrations.
- Compilation of Information Relating to Early/Interim Actions at Superfund Sites and the TCE IRIS Assessment (PDF)(3 pp, 929 K, About PDF)
Community Involvement and Vapor Intrusion
Community and stakeholder involvement is a key component of any Superfund site investigation and response action. It is particularly important for Superfund sites with vapor intrusion issues, where the exposures to toxic vapors in
- homes
- workplaces
- schools
- places of commerce
may be unavoidable (in the absence of mitigation systems). Community and stakeholder involvement activities should, therefore, be initiated as soon as possible after the determination that vapor intrusion concerns exist at a particular site.
If you have concerns about vapor intrusion where you live or work, please contact your state health department.
For more information about community involvement and cleanup sites, visit the Superfund Community Involvement web page.
Five-year Reviews and Vapor Intrusion
Section 121 of the Comprehensive Environmental Response, Compensation and Liability Act of 1980 (CERCLA), as amended by the Superfund Amendments and Reauthorization Act of 1986 (SARA), requires that remedial actions which result in any hazardous substances, pollutants or contaminants remaining at the site be re-evaluated every five years to determine if the remedy is and will continue to be protective of human health and the environment. OSWER Directive 9200.2-84 provides a recommended framework for assessing vapor intrusion in the context of the Superfund five-year review process, Assessing Protectiveness at Sites for Vapor Intrusion.
For further information, please contact Rich Kapuscinski (kapuscinski.rich@epa.gov)
phone: 703-305-7411