Chase Holton is a Senior Environmental Engineer based in Colorado with more than 10 years of research and consulting experience focused on contaminant fate and transport, including assessment and mitigation of the vapor intrusion (VI) pathway.
Chase has helped clients on numerous vapor intrusion projects across North America, Europe, and Australia. He assists clients by applying and overseeing the implementation of advanced vapor intrusion (VI) sampling, assessment, and mitigation techniques, including real-time sampling and analysis, building pressure control, and high volume sampling. Chase has also worked to identify and address soil and groundwater contamination at numerous sites across North America and Europe under various regulatory programs, including impacts from chlorinated solvents, petroleum hydrocarbons, pesticides, 1,4-dioxane, and per- and polyfluoroalkyl substances (PFAS).
To advance the state of the practice, Chase continues to improve the understanding and management of the subsurface to indoor air pathway, including ongoing work with U.S. EPA's Vapor Intrusion Science Team, U.S. EPA's Office of Research and Development, and academic partners. He has authored or co-authored several important studies on VI over the past decade. Chase also co-authored U.S. EPA and state guidance documents on VI, including recently developed U.S. EPA fact sheets on the use of indicators and tracers during VI investigations. In 2020-2021, he served as a guest associate editor for the Groundwater Monitoring & Remediation Focus Issue, Advancements in Vapor intrusion Risk Assessment.