vapor intrusion Articles

  • Vapor intrusion pathway investigation

    The BEACON samplers defined the vapor intrusion of tetrachloroethene and 1,1-dichloroethene, while the Summa canisters (EPA Method TO-15) reported all non-detects. The BEACON survey enabled detection of some chemicals at levels below the Summa canisters practical quantitation limits providing a more complete and realistic vapor intrusion exposure pathway evaluation. Based on the defined vapor ...

  • Vapor Intrusion: Risks and Challenges

    Vapor Intrusion (VI), defined as the migration of volatile contaminants from the subsurface into the indoor air of overlying buildings, is a major and challenging environmental issue for both regulators and the regulated community—one that continues to elicit heated debate among stakeholders. Eight factors associated with the VI pathway that contribute to its challenging nature are discussed ...

  • Review of Recent Research on Vapor Intrusion

    This paper reviews current and recent research in the area of vapor intrusion of organic compounds into residential buildings. We begin with a description of the challenges in evaluating the subsurface-to-indoor air pathway. A discussion of the fate and transport mechanisms affecting vapors along this pathway is then presented. Following this discussion is a brief overview of current Federal ...

  • Customization of Vapor Intrusion Control Solutions

    This is an exciting time in the development of the vapor intrusion control industry.  Significant increases in practitioner skill level and experience and the increased availability of specialized products have resulted in many innovative and customized solutions for addressing the vapor intrusion needs of developers, businesspeople, and attorneys.  This is especially true in three ...

  • New EPA Draft Guidance on Vapor Intrusion

    One of the primary objectives of the Office of Solid Waste and Emergency Response (OSWER) under EPA’s Strategic Plan is stated as: “By 2005, EPA and its state, tribal and local partners will reduce or control the risk to human health and the environment at more than 374,000 contaminated Superfund, RCRA, underground storage tank (UST), brownfields and oil sites, and have the planning and ...

  • Uncertainty and the Johnson-Ettinger Model for Vapor Intrusion Calculations

    The Johnson-Ettinger Model is widely used for assessing the impacts of contaminated vapors on residential air quality. Typical use of this model relies on a suite of estimated data, with few site-specific measurements. Software was developed to provide the public with automated uncertainty analysis applied to the model. (See http://www.epa.gov/athens/onsite.) An uncertainty analysis was performed ...

  • New approaches studied to investigate vapor intrusion

    In 2008, EPA Region 9 received an EPA RARE grant (Regional Applied Research Effort) to evaluate three promising techniques for VI assessment of indoor air: (1) using radon as a surrogate for assessing VOC VI; (2) using modified sorbent-based methods for longer, time-integrated measurements of indoor air VOCs; and (3) using building pressure differentials to assess the potential for VI. Available ...

  • U.S. EPA Updates Vapor Intrusion Guidance

    Untitled Document The attention of EPA and state environmental agencies to assessing the vapor intrusion pathway at potentially ...


    By AECOM

  • Vapor Intrusion Issues Risk Occupants’ Health

    Vapor intrusion occurs when a gaseous substance migrates into a building.  For example, volatile organic compounds and other gases can migrate from contaminated soils and groundwater through cracks in foundations or sewer lines and enter a building.  Vapor intrusion can create an indoor environment that damages structural materials and puts building occupants’ health at ...


    By Ultraviolet Devices, Inc.

  • Overview of Major Changes in EPA Draft Guidance for Vapor Intrusion

    The following provides a brief summary of the Draft Guidance for Evaluating the Vapor Intrusion to Indoor Air Pathway From Groundwater and Soils (Subsurface Vapor Intrusion Guidance). November 2002, EPA530-F-02-052. Major Points: This draft guidance supersedes the draft RCRA EI Supplemental Guidance for Evaluating the Vapor Intrusion to Indoor Air Pathway (Dec. 2001). It does not supersede ...

  • How Close to Contamination does a Property need to be for Vapor Intrusion to be a Concern?

    Cinnaminson, NJ, February 19, 2013 There are numerous sites across North America that have contaminated soil or groundwater due to manmade pollution.  Some of these sites have been a problem for decades and as communities have grown, more and more residential and commercial properties have been built above or near these areas. A major issue for properties built near these contaminated ...


    By EMSL Analytical, Inc.

  • Evaluation of Spatial and Temporal Variability in VOC Concentrations at Vapor Intrusion Investigation Sites

    ABSTRACT As vapor intrusion has become an increasing concern at corrective action sites, the USEPA and a number of state regulatory agencies have recently issued guidance documents covering the collection of subsurface gas, and above-ground air samples during vapor intrusion investigations. Most of these guidance documents do not provide specific recommendations concerning the number of each ...


  • NJDEP Vapor Intrusion Regulatory Changes: A Breath of Fresh Air

    On January 16, 2013, NJDEP released an update to its Vapor Intrusion Technical Guidance and updated its Vapor Intrusion Screening Levels. Screening levels are notably less stringent for a number of compounds, which have many of our clients sighing in relief.  For example, for tetrachloroethene (“PCE” or “PERC”) the groundwater screening level has been raised from 1 ...

  • Soil Sampling under Buildings and Solving Vapor Intrusion using Horizontal Drilling

    The Issue: The New Jersey Department of Environmental Protection (NJDEP) mandated soil and groundwater sampling under an active pharmaceutical company manufacturing building in order to address vapor intrusion inside the building. Installation of vertical borings and wells through the building slab was not practicable without profound disruption of manufacturing activities inside the building. ...

  • Enhanced Vapor Intrusion Mitigation via Horizontal Remediation Wells

    Vapor Intrusion (VI) is a potential concern at any building - existing or planned, located near soil or groundwater contaminated with volatile organic compounds (VOCs). Conventional installation technologies (vertical wells) can fall short, especially when large structures such as factories, hangars, and offices buildings are involved because they typically involve expensive and lengthy ...

  • Using bioaugmentation to reduce risks and costs associated with vapor intrusion

    The risk driver for remedial action on many sites is potential vapor intrusion hazard. While mitigation of the vapors entering the structure can reduce the risk to an acceptable level, there are associated long-term monitoring, operation and maintenance costs. Bioremediation of the source of vapors can reduce the risk and eliminate long-term costs. The vapor intrusion risk is managed by ...


    By CL Solutions, LLC

  • Strict Quality Assurance Procedures Ensure Reliable Vapor Intrusion Protection

    PROJECT: Toronto Fire Services LOCATION: Toronto, ON, Canada SQUARE FT: 6,000 APPLICATOR: Terrafix Environmental ENGINEER: Golder Associates CONTRACTOR: A-Plus General Contracting PRODUCTS: LIQUI D BOOT® , LB® BaseFabric T-60, LB® UltraShield G-1000 ...


    By CETCO

  • Canisters v. Sorbent Tubes: Vapor Intrusion Test Method Comparison

    Abstract A carefully designed field vapor intrusion investigation consisted of three one-foot deep borings spaced one-foot apart at three locations within the perimeter of a former dry cleaner. One six-liter Summa canister (EPA Method TO-15) and two pump/packed tube assemblies (EPA Method TO-17) were used in each three-boring arrangement for a total of nine sampling locations. A ...

  • Sensitivity analysis on parameters and processes affecting vapor intrusion risk

    A one‐dimensional numerical model was developed and used to identify the key processes controlling vapor intrusion risks by means of a sensitivity analysis. The model simulates the fate of a dissolved volatile organic compound present below the ventilated crawl space of a house. In contrast to the vast majority of previous studies, this model accounts for vertical variation of soil water ...


    By John Wiley & Sons, Ltd.

  • Vapor intrusion and indoor air quality due diligence during property transactions

    Vapor intrusion (i.e. the migration of volatile chemicals from contaminated soil and/or ground water through the subsurface into overlying building structures) as a contributing indoor air has become a growing concern for property owners and prospective purchasers in recent years as it can cause significant indoor air quality problems. This is largely due to the increased focus on this issue by ...

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