People

Todd McAlary is a senior environmental consultant with degrees in geological engineering and hydrogeology. He has over 20 years of experience focused on the evaluation of contaminant fate and transport in groundwater and the vadose zone.

Practice Specialties
Mr. McAlary specializes in assessing and mitigating the migration of volatile organic compound (VOC) vapors from the sub-surface into buildings and the associated human health risks. He coauthored the first technical publication demonstrating the potential for enhanced groundwater contamination attributable to vapor diffusion in 1989. He conducted his first assessment of subsurface vapor intrusion to indoor air in 1992 and since has conducted site-specific assessments of vapor intrusion at dozens of sites across the United States and internationally. Mr. McAlary has been the Technical Director of one of the world’s largest studies of subsurface vapor intrusion since 1997 at a site in the United Kingdom. He was invited by the U.S. EPA to participate in the development of the RCRA Supplemental Environmental Indicator (EI) Guidance on vapor intrusion, and was one of the three primary co-authors. He has provided technical consultation in support of litigation involving several vapor intrusion issues. He also has served as a technical specialist in regulatory negotiations involving groundwater contamination and vapor intrusion issues where his expertise and communication skills have been critical to stakeholder understanding of the complex nature of the topics.

Advancing the State-of-the-Practice
He continues to advance the state-of-the-practice by serving as a member of the U.S. EPA Expert Panel charged with revising the 2002 Draft OSWER Vapor Intrusion Guidance, teaching short courses on vapor intrusion at conferences and workshops and conducting applied research at several test-sites. He was the primary author of the Electric Power Research Institute’s (EPRI) vapor intrusion reference handbook, and a contributing author or editor to vapor intrusion guidance documents published by the Interstate Technical and Regulatory Consortium (ITRC), New Jersey Department of Environmental Protection, Canada’s Atlantic Provinces Partnership for RBCA Implementation (PIRI), Health Canada, and the Ontario Ministry of the Environment. He has chaired sessions, been an invited speaker and/or made platform presentations on vapor intrusion at over 25 conferences and organized or participated in several vapor intrusion workshops for private-sector clients.