Celebrating 40 Years of Service!

Upcoming events

    • 11/07/2018
    • 5:30 PM - 9:00 PM (EST)
    • Block Brewing Company, Howell, MI
    • 55

    MAEP Professional Development Meeting Presents . . .

    November 7, 2018

    New Tools for Vapor Intrusion Mitigation Design

    Todd McAlary, Ph.D., P.Eng., P.G., GeoSyntec

    Summary of ESTCP Research Project ER2013-22

    Mitigation systems for radon and volatile organic compound (VOC) vapor intrusion to indoor air (VI) are usually designed to impose a measurable vacuum beneath the floor slab of a building through gas extraction from below the floor and the primary monitoring parameter is the static vacuum imposed by the system.  This approach has some limitations associated with spatial variability in the vacuum field, temporal variability in the ambient cross-slab pressure gradient and building-specific conditions (bulk average permeability of the floor slab and material below the floor).  Several new lines of evidence have been developed through a 5-year research program sponsored by the U.S. Department of Defense, through the ESTCP program.  The analysis includes monitoring of transient vacuum response to turning the extraction fans on and off, helium tracer testing and mass emission monitoring combined with a mathematical model of fluid flow in a two-layer system (Hantush and Jacob, 1955).  The incremental cost to include the additional lines of evidence is small and the savings generally increase as the size of the building increases, so net savings are to be expected for medium or large buildings.  Case studies from three buildings of different sizes will be included to demonstrate the application of the new lines of evidence.

    Speaker Biography
    Todd McAlary has a Bachelor’s degree in Geological Engineering, a Master’s degree in Contaminant Hydrogeology, a Ph.D. in Chemistry and has been the Practice Leader for Vapor Intrusion services at Geosyntec Consultants, Inc. for 20 years.  He was one of three co-authors of the U.S. EPA 2001 RCRA guidance on vapor intrusion and has been a member of EPA’s expert panel on vapor intrusion since 2000.  He has conducted applied research on several new technologies for vapor intrusion assessment and mitigation, including passive sampling, high volume soil vapor sampling, mathematical modeling, tracer testing, building pressure cycling and recently developed a new method for calculating building-specific attenuation factors from flow and vacuum measurements.  He also has a Certificate in University Teaching and is an Adjunct Professor at the University of Toronto.  

    5:30 p.m. – 9:00 p.m.

    Block Brewing Company
    1140 S Michigan Ave
    Howell, MI 48843

    Schedule of Events:

    5:30 p.m. – 6:15 p.m. – Registration and Cocktail Reception

    6:15 p.m. – 7:15 p.m. – Dinner

    7:15 p.m. – 9:00 p.m. – Presentation Followed by Questions

    Sponsored by:

    • 12/13/2018
    • 5:30 PM
    • Ann Arbor, Michigan

    2018 MAEP Annual Meeting Program
    Weber's Inn, Ann Arbor

    December 13, 2018

    • Cocktail Reception & Hors D'oeuvres  - 5:30-7:00 pm
    • Welcome, Announcements & Thank You to Sponsors  - Presented by Rick Dunkin
    • Grant Awards
    • Introduction of Board of Directors
    • Recognition of MAEP 2018 President Rick Dunkin
    • Raffle Drawing

    Please let us know if you can not make it. If we do not received a cancellation notice from you prior to the event you will be charged a $40 no show fee.

    Sponsor Form

    $139++ Hotel Room Rate
    To ensure you receive the special rate quoted above, please refer to the Michigan Association of Environmental Professionals HOLIDAY, group MAEP120618, when making reservations. Reservations must be made before November 12, 2018. Please call toll free for hotel reservations at 800-443-3050.

    Thank You Sponsors:

    Silver Sponsors:
    TRC Environmental

    Sponsors will be announced at the event, listed in the printed program and in future publications of MAEP. If your company would like to be a sponsor and underwrite the Annual Meeting in full or in part, please contact Cheryl Anne Farmer, MAEP Executive Director, at 734.498.2838 or admin@maep.org or fill out the online registration form.

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