Thank you to our 2025 Speakers

Corin Fogle has a Bachelor of Science degree in Biology from Marietta College and a Master of Public Health degree in Environmental Health from Kent State University. Corin has worked at the Ohio Environmental Protection Agency in Columbus, Ohio for over 10 years. Corin started as an Enforcement and Rules Coordinator in the Division of Drinking and Ground Waters. She worked as a Risk Assessor in the Division of Environmental Response and Revitalization (DERR) for 7 years. In August 2024, Corin became the supervisor of the Brownfields, enforcement, and remedial programs in DERR. Corin is also one of the supervisors of the Voluntary Action Program. Corin is a member of the ITRC Vapor Intrusion Pathway Evaluation and Mitigation Team, serving as one of the leaders of the Conceptual Site Model sub-group.

Jennifer (Jen) Stackhouse is an Associate Toxicologist with the Human and Ecological Risk Office (HERO) at the California Department of Toxic Substances Control (DTSC) and a doctoral candidate at the University of Idaho where her research focuses on soil vapor and impacts affecting vulnerable communities and women’s health.  She has over 20 years of experience in applied toxicology, human health and ecological risk assessments, and the application of risk-based approaches for environmental investigation and remediation. Her work spans a wide range of regulatory programs and site types including RCRA Corrective Action sites, active military bases, Superfund sites, and voluntary cleanup programs. Ms. Stackhouse’s areas of expertise include contaminant fate and transport, soil vapor intrusion, and risk-based communication strategies, soil vapor intrusion evaluations for both occupied and unoccupied structures, as well as the sampling and risk evaluation of soil, groundwater, and surface water, indoor air, and outdoor air. She also has significant experience in environmental data management and laboratory coordination. She joined DTSC in November 2023 following her role as a Senior Environmental Toxicologist at Kleinfelder. In addition to her work as a toxicologist in HERO, she currently serves as the Data and Risk Evaluation Subgroup Leader for the Interstate Technology and Regulatory Council (ITRC) Vapor Intrusion Team and is an active member of both the California Environmental Protection Agency (CalEPA) and DTSC Vapor Intrusion Workgroups. She holds a Master of Science in Environmental Science with a focus in environmental toxicology from the University of Idaho. 

Matthew Williams is a volatilization to indoor air specialist specializing on mitigation strategies and vapor intrusion, serving as the Volatilization to Indoor Air Specialist at the Michigan Department of Environment, Great Lakes, and Energy Remediation and Redevelopment Division (EGLE-RRD). In this role, he spearheads the development and implementation of methodologies to investigate and assess the vapor intrusion pathway, ensuring the safety and well-being of indoor environments.

As a program specialist and technical lead for the Vapor Intrusion Technical Assistance and Support Team, Matt has led numerous stakeholder groups and authored pivotal guidance documents, papers, and standard operating procedures. His expertise extends to conducting extensive trainings and delivering talks on sampling methods, vapor intrusion, petroleum vapor intrusion, mitigation, and indoor air quality both nationally and internationally.

Noteworthy among his contributions is Matt's leadership role in the Interstate Technology & Regulatory Council (ITRC), where he served as a section leader for the Petroleum Vapor Intrusion: Fundamentals of Screening, Investigation, and Management training in 2014. He also co-led both classroom and internet-based training teams and served as a co-leader for ITRC’s Vapor Intrusion Mitigation Team. Currently, Matt plays a crucial role as a co-leader for ITRC’s ongoing update for vapor intrusion, overseeing a collaborative effort involving nearly 200 professionals across the United States.

Matt holds a Bachelor of Science degree in Geology from Central Michigan University, earned in 1993, laying the foundation for his distinguished career in environmental science and indoor air quality management.