Contaminated Site Clean-Up Information (CLU-IN): Internet Seminar Video Archives

Since 1998, The Contaminated Site Clean-Up Information (CLU-IN) website has presented Internet Seminars covering a wide variety of technical topics related to hazardous waste characterization, monitoring, and remediation. For select seminar topics offered since 2012, we are making complete video recordings available through our archives. This feed contains all video seminars archived in the last 12 months. For a complete list of seminars archived since 2000, please visit Our Rehabilitation Act Notice for reasonable accommodation is available at CLU-IN was developed by the U.S. Environmental Protection Agency (EPA) but is intended as a forum for all waste remediation stakeholders. For more information and to view upcoming live offerings, please visit For a complete list of RSS feeds available on CLU-IN, please visit


Vapor Intrusion Mitigation (VIM-1) (Jun 1, 2021)

When certain contaminants or hazardous substances are released into the soil or groundwater, they may volatilize into soil gas. Vapor intrusion (VI) occurs when these vapors migrate up into overlying buildings and contaminate indoor air. ITRC has previously released guidance documents focused on VI, including the "Vapor Intrusion Pathway: A Practical Guidance" (VI-1, 2007) and "Petroleum Vapor Intrusion: Fundamentals of Screening, Investigation, and Management" (PVI, 2014). However, ITRC has received multiple requests for additional details and training on mitigation strategies for addressing this exposure pathway. The ITRC Vapor Intrusion Mitigation Team (VIMT) created ten fact sheets, 16 technology information sheets, and 4 checklists with the goal of assisting regulators during review of vapor intrusion mitigation systems, and helping contractors understand the essential elements of planning, design, implementation, and operation, maintenance and monitoring (OM&M) of mitigation systems. The Vapor Intrusion Mitigation training is a series of eight (8) modules, presented over two sessions as noted in the graphic below. The Vapor Intrusion Mitigation training series provides an overview of vapor intrusion mitigation and presenting information from the ITRC fact sheets, technology information sheets, and checklists (VIM-1, 2021): Introduction & Overview of Vapor Intrusion Mitigation Training TeamConceptual Site Models for Vapor Intrusion MitigationPublic Outreach During Vapor Intrusion MitigationRapid Response & Ventilation for Vapor Intrusion MitigationActive Mitigation ApproachesPassive Mitigation ApproachesSystem Verification, OM&M, and Exit StrategiesRemediation & Institutional Controls After the Vapor Intrusion Mitigation series, you should understand:How to locate and utilize the VIM-1 fact sheets, technology information sheets, and checklistsThe importance of a VI mitigation conceptual site modelHow public outreach for VI mitigation differs from other environmental mattersWhen to implement rapid response for vapor intrusion and applicable methodologies The differences between remediation, mitigation, and institutional controlsAvailable technologies for active and passive mitigation, and design considerations for various approachesHow/when/why different mitigation technologies are appropriateHow to verify mitigation system success, address underperformance, and develop a plan for discontinuing a mitigation system We encourage you to use the ITRC Vapor Intrusion Mitigation work products (VIM-1) and these training modules to learn about vapor intrusion mitigation and how you can apply these best practices to improve decision-making at your sites. For regulators and other government agency staff, this understanding of vapor intrusion mitigation can be incorporated into your own programs. While the training makes every effort to keep the information accessible to a wide audience, it is assumed that the participants will have some basic technical understanding of chemistry, environmental sciences, and risk assessment. As with other emerging contaminants, our understanding of vapor intrusion mitigation continues to advance. This training provides the participants with information on areas where the science is evolving and where uncertainty persists. To view this archive online or download the slides associated with this seminar, please visit


 2021-06-02  n/a