An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Freedom of Information Act (FOIA)

Vapor Intrusion Characterization Report (Revision 1.0)

Vapor Intrusion Characterization Report (Revision 1) - February 5, 2015:  This report, which was approved by the EPA on February 18, 2015, documents the results from implementation of the Final Vapor Intrusion Characterization Work Plan.  Specifically, the report presents the findings from the sampling of vapor monitoring points – both ambient air sampling and crawl space vapor sampling.  

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.