This HEER-sponsored webinar reviews current trends in the evaluation of vapor intrusion impacts to homes and buildings that overlie VOC-contaminated soil and groundwater. Roger Brewer with the HEER office gives a brief overview of a webinar on vapor intrusion held February 18th, 2015. Martin Schmidt with Cox-Colvin, Inc., then provides an overview of active soil gas sampling methods and approaches to improve data quality for evaluation of vapor intrusion hazards. This was followed by a similar presentation on passive soil gas sampling methods by Harry O’Neill of Beacon Environmental, Inc. Topics addressed include the basics of active and passive soil gas sample collection, vapor plume heterogeneity and the use of larger numbers of samples and/or larger-volume samples to provide more reliable data for decision making. Implications for vapor intrusion guidance in Hawai’i as well as on the mainland were discussed.
Roger Brewer, State of Hawaii, Department of Health, Hazard Evaluation and Emergency Response Office
Martin (Mort) Schmidt is currently Practice Leader for vapor intrusion for the consulting firm Cox-Colvin, & Associates in Plain City, Ohio, where he has been employed since 1997. Prior to Cox-Colvin, Mr. Schmidt served as a radon investigator for the Ohio EPA, a geologist for Geraghty and Miller (now Arcadis), and an exploration geologist for Shell International. Mort received his B.S. and M.S. degrees in Geology from the Ohio State University.
Harry O’Neill is the President of Beacon Environmental Services, which is an accredited laboratory and field sampling organization that specializes in the collection and analysis of soil gas and air samples. Mr. O’Neill has managed soil gas investigations for more than 20 years working on federal, state, and commercial projects throughout the United States, as well as internationally across six continents. Mr. O’Neill has been on the forefront of the acceptance of passive soil gas sampling technologies at the national and international level and has overseen the implementation of over a thousand soil gas surveys. He is a member of AWMA, ITRC, and ASTM, is the lead author of ASTM Standard D7758: Standard Practice for Passive Soil Gas Sampling, and has published and presented findings throughout the United States, as well as internationally.