Webinar: Vapor Intrusion Mitigation Session 2

ITRC's Vapor Intrusion Mitigation training is a series of eight (8) modules, presented over two sessions. If you took the ITRC VIM series previously, the content has stayed the same, but the new course directs people to the Vapor Intrusion (VI) Toolkit resources published in January 2026 by ITRC.

The Vapor Intrusion Mitigation training series provides an overview of VIM and presents information from the 2026 ITRC VI Toolkit (which includes fact sheets, technology information sheets, and checklists).

Session 1:

• Introduction & Overview of Vapor Intrusion Mitigation Training Team
• Conceptual Site Models for Vapor Intrusion Mitigation
• Community Engagement During Vapor Intrusion Mitigation
• Rapid Response & Ventilation for Vapor Intrusion Mitigation
• Remediation & Institutional Controls

Session 2:

• Active Mitigation Approaches
• Passive Mitigation Approaches
• System Verification, OM&M, Curtailment and Shutdown
  
  When certain contaminants or hazardous substances are released into the soil or groundwater, they may volatilize into soil vapor. VI occurs when these vapors migrate up into overlying buildings and contaminate indoor air. The ITRC VI Toolkit combines the previous ITRC VI-related guidance documents (VI 2007, PVI 2014, VIM-1 2020), along with updates, into one comprehensive resource toolkit (including fact sheets, technology information sheets and checklists) published in January 2026.

After the Vapor Intrusion Mitigation series, you should understand:

• How to locate and utilize the relevant document, fact sheets, technology information sheets, and checklists
• The importance of a VI mitigation conceptual site model
• How community engagement for VI mitigation differs from other environmental matters
• When to implement rapid response for VI and applicable methodologies
• The differences between remediation, mitigation, and institutional controls
• Available technologies for active and passive mitigation, and design considerations for various approaches
• How/when/why different mitigation technologies are appropriate
• How to verify mitigation system success, address underperformance, and develop a plan for curtailment of a mitigation system and shutdown

We encourage you to use the ITRC VI Toolkit and these training modules to learn about VI mitigation and how you can apply these best practices to improve decision-making at your sites. For regulators and other government agency staff, this understanding of VI mitigation can be incorporated into your own programs.

While the training makes every effort to keep the information accessible to a wide audience, it is assumed that the participants will have some basic technical understanding of chemistry, environmental sciences, and risk assessment. As with other emerging contaminants, our understanding of VI mitigation continues to advance. This training provides the participants with information on areas where the science is evolving and where uncertainty persists.