Course Description

Data collection, observation and experience has been instrumental in understanding the significance of the vapor intrusion pathway and for informing guidance. This presentation will cover twenty years of data collection that provide insight on data correlations, attenuation factors, importance of fate and transport processes, and site factors.


Dr. Ian Hers

Dr. Ian Hers is a senior consultant and Principal of Golder Associates located in Vancouver, B.C., Canada with 27 years professional experience, and is the global vapour practice leader for Golder Associates.Ian has helped develop guidance for regulatory agencies in Canada, US and UK, authored over 20 technical papers on vapour intrusion, and has conducted research projects on vapour intrusion for the Contaminated Sites Approved Professionals Society of BC, Health Canada, US EPA, American Petroleum Institute, Shell Global, Science Advisory Board for Contaminated Sites of BC and other organizations. He made significant contributions to the Interstate Technology and Regulatory Council (ITRC) guidance on Petroleum Vapour Intrusion and Light Non-Aqueous Phase Liquid management, and regularly provides internet-based training for ITRC on these topics. Dr. Hers holds a Ph.D. in Civil Engineering (University of British Columbia), is on the Board of Directors of the Science Advisory Board for Contaminated Sites, and is a Contaminated Sites Approved Professional in British Columbia.

Course curriculum

  • 1

    Soil Vapour Innovation & Evolution of the Conceptual Site Model – Learning from 20 Years of Data Collection

    • Discussion

    • Soil Vapour Innovation and Evolution of the Conceptual Site Model – Learning from 20 Years of Data Collection