The Interstate Technology Regulatory Council (ITRC) will offer online training on Understanding Vapor Intrusion – Introductory Concepts & Fundamentals over two sessions on April 30 and May 12, 2026.
The Understanding Vapor Intrusion training series introduces the concepts and fundamentals of vapor intrusion and presents information on using the ITRC’s Vapor Intrusion Toolkit, published in January 2026. DNR staff participated in the development of both the technical resources and training. The toolkit is designed for state regulators but also helps environmental consultants and other industry professionals learn about vapor intrusion.
The training covers the topics below presented over two, two-hour sessions.
Session 1 – April 30, 2026 (noon to 2 p.m. CST)
Topics:
- Vapor intrusion and basic science
- Common vapor intrusion scenarios
- Introduction to data and decisions
- Stakeholder communication
Session 2 – May 12, 2026 (noon to 2 p.m. CST)
Topics:
- Recap: how vapor intrusion is different
- How to assess vapor intrusion
- Managing vapor intrusion risk
- Closure and exit strategies
Interested individuals are encouraged to register at the CLU-IN Training & Events webpage. The recorded training will also be available on-demand at the CLU-IN Training Archived Webinars webpage.
Site-specific questions regarding vapor intrusion in Wisconsin should be directed to the assigned DNR Project Manager. General vapor intrusion questions can be directed to the contacts listed on the DNR’s RR Program Staff Contacts website.