ITRC's Vapor Intrusion Toolkit Resources – An Orientation

This orientation will provide a brief overview of vapor intrusion and introduce attendees to the 2026 ITRC Vapor Intrusion (VI) Toolkit and its many resources.

The VI Toolkit includes the Vapor Intrusion Technical and Regulatory Guidance and a suite of fact sheets, technology information sheets, and checklists, all of which are individually available for download and use. Also provided is a series of YouTube Playlists featuring ITRC-produced videos and content from other organizations. Key topic areas addressed in the toolkit include:

• Vapor intrusion fundamentals and conceptual site models
• Site screening and investigation strategies
• Sampling and analysis
• Data evaluation and risk assessment
• Modeling
• Vapor intrusion mitigation
• Community engagement

The Toolkit provides a comprehensive overview of vapor intrusion concepts, recommended practices, and decision-making approaches across a wide range of site conditions. The Toolkit replaces, combines, and updates three previous ITRC vapor intrusion guidance documents: Vapor Intrusion Pathway: A Practical Guidance (VI-1, 2007), Petroleum Vapor Intrusion: Fundamentals of Screening, Investigation, and Management (PVI 1, 2014), and Technical Resources for Vapor Intrusion Mitigation (VIM-1, 2020). It reflects advances in science, policy, and field experience, and is designed to support regulators, practitioners, and stakeholders in conducting consistent and effective vapor intrusion assessments.

The course will provide connections to the 2026 ITRC VI Toolkit to help the audience understand how to find and use these new resources, and upcoming live ITRC training opportunities that will provide more in-depth education concepts provided in the Toolkit.

Charles Reyes, ITRC
Charles Reyes joined ITRC in May 2023 as the Director and is responsible for overseeing the implementation of the strategic direction and priorities, coordinating activities of the Board of Advisors, Teams, and partners and managing ITRC’s staff and financials. Prior to joining ITRC, he worked for the Association of State and Territorial Solid Waste Management Officials (ASTSWMO) for 14 years in various capacities and spent a few years as an environmental consultant. Charles holds a B.A. in Political Science – Legal Studies from Virginia Tech, and a Master Certificate in Supervisory and Human Resources Management from Michigan State University – Eli Broad College of Business.

Jennifer Borski, Wisconsin Department of Natural Resources
Jennifer Borski is the Vapor Intrusion Team Leader with the Wisconsin Department of Natural Resources (WDNR). The VI team works to identify and address policy issues, develop and update guidance and provide training regarding the vapor intrusion pathway and state’s Dry Cleaner Environmental Response Program in addition to serving as technical support for vapor intrusion investigations and mitigation systems throughout the state. She also serves as the WDNR’s liaison with the Wisconsin Department of Health Services related to vapor intrusion issues. Since 2019, Jennifer has been a member of ITRC and worked on development of the Vapor Intrusion Mitigation (VIM) and the ITRC Vapor Intrusion Toolkit. Jennifer previously served for 20 years as a Hydrogeologist at WDNR regulating the investigation, mitigation, remediation and redevelopment of contaminated properties in east-central Wisconsin, including discharges from dry cleaners, paper mills, metal plating facilities and other historical industrial and commercial operations. Jennifer is a member of the Assoc. of Vapor Intrusion Professionals (AVIP) and is participating with AARST, also known as the Indoor Environments Assoc., on development of a national vapor intrusion mitigation credential. She has a B.S. from the University of Wisconsin – Eau Claire in Geology and Mathematics.

Catherine Regan, P.E., Haley & Aldrich
Catherine Regan is a VI Technical Expert at Haley & Aldrich with over 23 years of experience in environmental consulting and engineering. Ms. Regan is a subject matter expert for the assessment and management of residential, commercial and industrial vapor intrusion (VI) investigation and mitigation both in the US and abroad. Additionally, she has experience in other areas of contaminated site management including site investigations; stakeholder engagement; data visualization and interpretation; and remediation system design, permitting, construction, operations, and maintenance. Since 2012, Catherine has been an active member and trainer of ITRC Petroleum Vapor Intrusion, Vapor Intrusion Mitigation, and Vapor Intrusion Toolkit teams. Ms. Regan received a BS in Environmental Engineering from Cornell University and an MS in Environmental Fluid Mechanics and Hydrology from Stanford University.  She is a registered Professional Engineer in Massachusetts, Vermont, and Connecticut.

Moderator:

ITRC Training Program (itrc@itrcweb.org)

• These materials will be available by Tuesday, July 21, 2026

Webinar Slides and References:

• These materials will be available by Tuesday, July 21, 2026

Additional Resources:

• These materials will be available by Tuesday, July 21, 2026

The feedback form for this webinar will be available starting on Tuesday, July 21, 2026.

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It is EPA's policy to make reasonable accommodation to persons with disabilities wishing to participate in the agency's programs and activities, pursuant to the Rehabilitation Act of 1973, 29 U.S.C. 791. Any request for accommodation should be made to ITRC Training Program at 202-266-4932 or itrc@itrcweb.org, preferably one week or more in advance of the webinar, so that EPA will have sufficient time to process the request. EPA would welcome specific recommendations from requestors specifying the nature or type of accommodation needed. EPA welcomes specific recommendations from requestors specifying the nature or type of accommodation needed. Please note that CLU-IN provides both alternate phone call-in options and closed captioning for all webinars, and requests for these specific accommodations are not necessary.

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