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EPA issues a draft guidance that provides current technical and policy recommendations on determining if the vapor intrusion pathway poses an unacceptable risk to human health at cleanup sites. Vapor intrusion is a rapidly developing field of science and policy. This draft guidance is intended to aid in evaluating the potential for human exposure from this pathway given the state-of-the-science at this time. EPA will continue to explore this area in efforts to improve the state-of-the-science of this complex exposure pathway. This OSWER guidance supercedes the RCRA guidance issued in December 2001 found at the bottom of this page.
Federal Register Notice - November 29, 2002
Fact Sheet: Evaluating the Vapor Intrusion into Indoor Air
Adobe PDF File [17 KB]
Draft Guidance for Evaluating the Vapor Intrusion to Indoor Air Pathway from Groundwater and Soils (Subsurface Vapor Intrusion Guidance) (Complete Document)
Adobe PDF File [3019 KB]
E-Docket is an on-line system that allows viewers to search the Agency's major public dockets on-line, view the index listing of the contents for the dockets included in the system, and access those materials that are available on-line. You may also submit comments on-line while this docket is open for public comment.
RCRA Draft Supplemental Guidance for Evaluating the Vapor Intrusion to Indoor Air Pathway (Vapor Intrusion Guidance) - December 2001
Partial Response to "Question 3" of 02/05/99 RCRA Corrective Action Environmental Indicator (EI) RCRIS Code (CA725) "Current Human Exposures Under Control"
- Draft Supplemental Guidance for Evaluating the Vapor Intrusion to Indoor Air Pathway Adobe PDF, 29 pages, [674 KB]
- Table 1 Adobe PDF, 29 pages, [674 KB]
- Table 2 Adobe PDF, 4 pages, [20 KB]
- Table 3 Adobe PDF, 2 pages, [21 KB]
- Environmental Indicator Guidance (02/05/99) Adobe PDF, 17 pages, [52 KB]
- Vapor Intrusion Home Page