ATLANTA, Ga. — Geosyntec's Robbie Ettinger and Todd McAlary, PEng, PG, served as instructors for the Interstate Technology Regulatory Council's (ITRC) two-day training course, "Vapor Intrusion Pathway: A Practical Guideline," on January 20 - 21, 2011 in San Antonio, Texas. Robbie and Todd, both internationally recognized vapor intrusion experts, discussed innovative strategies to conduct site screening and investigations, tools for data collection and evaluation, and mitigation options.
For more than 15 years, Robbie's practice has focused on fate and transport of contaminants in the unsaturated zone including soil vapor extraction system design, vapor emission estimation, and subsurface contaminant vapor migration to indoor air. He is co-author of the Johnson and Ettinger (1991) algorithm for evaluating subsurface contaminant vapor intrusion to indoor air and has conducted field investigations and modeling evaluations on this topic for over a decade. Robbie received his MS in chemical engineering from the University of California, Berkeley, and his BS in chemical engineering from Rice University.
Todd has more than 20 years of consulting experience on environmental investigation and remediation projects. His primary focus is on the evaluation of contaminant fate and transport in groundwater and the vadose zone. Todd is also experienced with the migration of volatile organic compound (VOC) vapors originating beneath and around buildings as well as the assessment of inhalation exposures from subsurface vapor intrusion to indoor air. He has been a leading technical contributor to the U.S. Environmental Protection Agency and state environmental agency guidance documents on vapor intrusion issues. Todd received his MSc in earth sciences — hydrogeology/geochemistry and BASc in geological engineering from the University of Waterloo.