The Association of Vapor Intrusion Professionals to Host the

5th Vapor Intrusion Conference

October 11-14, 2026

Orlando, FL

Regulators, Attorneys and Consultants Working Together for Best Practices

to provide Soil Gas Safe Communities

#AVIPFL26

New Interactive Experiences at AVIP 2026 You Won't Want to Miss

AVIP has always been more than a conference, it's a community built on collaboration and shared knowledge among professionals who are passionate about advancing the vapor intrusion industry.

This year, we're expanding opportunities for attendees to collaborate, share ideas, and become more involved in the AVIP community. Whether you'd like to work through a real-world vapor intrusion case, engage directly with regulators, or connect with fellow professionals, these new interactive experiences are designed with you in mind.

Tuesday – NEW! Interactive VI Toolbox Workshop - Led by: Andrew Leavitt, California Department of Toxic Substances Control, Tina Ures, California State Water Resources Control Board and Jen Stackhouse, M.S., Ph.D. Candidate, California Department of Toxic Substances Control
Wednesday – Regulator Roundtable Discussions -
Wednesday – Continue the Conversation: AVIP Community Discussion - Lunch Provided (advance registration required)

A complimentary plated lunch will be served during the AVIP Community Discussion. If you plan to attend the Community Discussion, please register in advance so we can provide the hotel with an accurate meal count.

Reserve Your Complimentary Lunch by September 18, 2026

These experiences are designed to complement our technical program by creating opportunities to collaborate, exchange ideas, and build lasting professional connections. We hope you'll join us, not just to attend AVIP 2026, but to share your ideas, make new connections, and become part of what makes the AVIP community so special.

Matthew Lahvis

Keynote Speaker

The 5th AVIP VI Conference is honored to welcome Matthew Lahvis as the Keynote Speaker for the 2026 conference, taking place October 11–14, 2026 in Orlando, Florida.

Matt is a Principal Soil and Groundwater Scientist at Shell Oil Products US where he provides technical leadership on soil and groundwater issues associated with oil and gas operations. His work focuses on petroleum chemical fate and transport, vapor intrusion science, risk-based environmental management, and remediation strategies for contaminated sites.

Matt is widely recognized for his contributions to the science and policy surrounding petroleum vapor intrusion (PVI). His research has helped inform major regulatory frameworks, including California’s Low-Threat Underground Storage Tank Closure Policy and petroleum vapor intrusion guidance developed by the U.S. Environmental Protection Agency (EPA) and the Interstate Technology & Regulatory Council (ITRC).

In addition to his research contributions, Matt has served as a technical advisor supporting vapor intrusion guidance development in the United States, the United Kingdom, Australia, and Canada, helping shape best practices used by regulators, consultants, and industry worldwide.

Matt is also an active member of the American Petroleum Institute’s Soil and Groundwater Task Force and has been recognized by the Interstate Technology & Regulatory Council (ITRC) as the Industry Affiliates Program Member of the Year for his contributions to advancing environmental science and regulatory collaboration.

He currently serves as an Associate Editor for the Groundwater Monitoring & Remediation journal and has authored numerous scientific papers and a book chapter on vapor intrusion. Over his career he has received several honors, including awards from the U.S. EPA Office of Underground Storage Tanks, the Association for Environmental Health and Sciences (AEHS), ASTM International, and Shell recognizing his leadership and scientific contributions to environmental protection.

Prior to joining Shell, Matt worked for 11 years with the U.S. Geological Survey (USGS) in the New Jersey District Office, where he developed the open-source R-UNSAT reactive transport model for unsaturated-zone processes. He also served as an Adjunct Professor at Drexel University, where he earned his PhD in Civil Engineering.

We are honored to have Matt join the AVIP VI Conference community and look forward to the insights he will share with environmental professionals working in vapor intrusion, contaminated site management, groundwater science, and environmental remediation.

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