NOTE: The ITRC Vapor Intrusion Toolkit (VI Toolkit) published in January 2026 updates the information in this original guidance document. This document has not been amended since publication. Some content may be out of date and may no longer apply. For the most recent information, please visit the ITRC VI Toolkit at https://itrcweb.org/vapor-intrusion-toolkit/.
Technical Resources for Vapor Intrusion Mitigation (VIM) is designed to aid state regulators in understanding various mitigation strategies, how they are installed and fundamentally work, and what factors to consider as part of the review process. This document is intended to guide regulators and project managers through the critical elements of selection, design, implementation, and operation of VIM.
Topic(s): Indoor Air, Remediation Technologies, Vapor Intrusion
