Use of Radon Measurements for Evaluation of Volatile Organic Compound (VOC) Vapor Intrusion

TRRP Training: 2022 Program

presented by: GSI Environmetal Inc.

Texas Risk Reduction Program regulations (TRRP; 30 TAC 350) establish consistent risk-based protocols for assessment and response to soil, groundwater, or surface water impacts associated with environmental releases of regulated wastes or substances.

Presented by GSI Environmental Inc., this popular and informative training series is a must for professionals who need a working understanding of TRRP and those needing to stay up-to-date with the latest TCEQ TRRP guidance and policies.

TRRP Training Course (2 Days): Provides an overview of the TRRP framework and step-by-step training on property assessment and response action procedures established under the TRRP rule

Attendees will become acquainted with rules, key guidance and policies covering affected property assessments, protective concentration levels, and response actions. The course material presents strategies for efficient project management in compliance with TRRP and explains the various report forms adopted by TCEQ.

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Dates and Location

Dates

June 14th and 15th, 2022

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Crowne Plaza River Oaks 2712 SW Freeway Houston, Texas 77098 713.523.8448 http://www.crowneplaza.com/

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Authors: Thomas McHugh, D. Hammond, T. Nickels, B. Hartman

Published: February 2008 in Environmental Forensics volume 9 (1).
Abstract

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We have utilized a simple method for the collection of gas samples from vapor intrusion investigation sites and the analysis of radon concentrations at an offsite laboratory. The radon data can be used to evaluate the movement of soil gas through building foundations at sites contaminated with volatile organic compounds (VOCs) where vapor intrusion is a concern. The use of radon as a trace for the movement of soil gas into buildings minimizes the problem of indoor sources associated with the direct measurement VOCs. We have used this method to measure indoor to sub-slab attenuation factors in six buildings with the resulting values ranging from 0.0002 to 0.006 (dim). These values are similar to radon attenuation factors reported by other researchers, but are much lower than default values for VOCs recommended in regulatory guidance (United States Environmental Protection Agency [USEPA], 2002). The vertical radon concentration profile in soil gas can be used to evaluate soil gas mixing with the atmosphere to support the collection of soil gas samples for VOC analysis adjacent to, rather than below, a building.