Harry O’Neill

President, Beacon Environmental

Harry O’Neill is the President of BEACON, which is an internationally recognized laboratory, and has managed soil gas and vapor intrusion investigations for more than twenty-five years, providing U.S. EPA approved methods throughout the United States, as well as internationally across six continents. Under his direction, BEACON has achieved ISO/IEC 17025, U.S. DoD ELAP, and NELAP accreditation for the analysis of air and soil gas samples to target VOCs and SVOCs using sorbent samplers. Mr. O’Neill has been on the forefront of the acceptance of passive sampling technologies at the national and international level, working with regulators, as well as multiple universities on research projects, and has managed the implementation of thousands of soil gas and air sampling surveys. He is a member of AWMA, ITRC, NICOLE Brasil, and ASTM; is the lead author of ASTM Standard D7758: Standard Practice for Passive Soil Gas Sampling in the Vadose Zone; and has published and presented findings throughout the United States, as well as internationally as an invited speaker.

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Advanced Passive Sorbent Samplers: Why Long Duration Time-Integrated Samples Provide More Accurate Vapor Intrusion Data

When determining potential health risks from the vapor intrusion of organic compounds, indoor air samples typically have been collected over 24-hours or less.  Research completed by Dr. Paul Johnson (President of the Colorado School of Mines) and others have determined that the temporal variability of indoor air contaminant concentrations from vapor intrusion can vary by orders of magnitude and that long-duration samples collected over days or weeks may better represent the health risks to building occupants.  The US EPA and state agencies recognize that employing longer collection periods with time-weighted average sampling is expected to yield a more reliable basis for estimating both long-term and short-term exposure than a one-day sample event. Data will be presented which shows the accuracy and precision of collecting high-quality long duration samples with passive samplers to evaluate vapor intrusion pathways and risks.