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

Audio for "FY26 M2S2 Webinar: Data Usability Assessments," Jun 25, 2026

Stephen.M.Stacy@usace.army.mil (Stephen Stacy) — Thu, 25 Jun 2026 23:00:00 GMT

The Data Usability Assessment (DUA) is a defined process that considers whether data meet project data quality objectives (DQOs) as they relate to the decision to be made and evaluates whether data are suitable for making that decision. DUAs are critical to ensuring that Munitions and Explosives of Concern (MEC) and munitions constituents (MC) data are of the right type, quantity, and quality to meet project DQOs. The project-specific requirements for conducting the DUA process are defined during the Systematic Planning Process and documented in the project-specific QAPP. This webinar will discuss the DUA process for both MEC and MC during remedial investigation and remedial actions. At the end of this webinar, attendees will be able to explain the purpose of DUA, identify the project team members required to participate, select the appropriate inputs, conduct the assessment, and document the DUA outputs. Presentations will be suitable for the varied M2S2 webinar audience, which typically includes government, regulator, and contractor attendees, and there will be opportunities for questions and discussion. To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/tio/m2s2fy26-2_062526/

Audio for "Federal Facilities Online Academy: Resolving Issues before Formal Dispute," Jun 10, 2026

Reynolds.John.D@epa.gov (John Reynolds) — Wed, 10 Jun 2026 23:00:00 GMT

Resolving Issues Before Formal Dispute is a two-hour webinar course that identifies less formal options to address conflict before going to dispute under a federal facility agreement. This webinar provides project management tips and techniques to address disagreements early in the process . By taking this course, participants will achieve the following objectives:Identify factors that contribute to conflict when working with team members from different agencies;Learn how to prepare a team to handle conflict;Explore tips and techniques to improve communication and come to resolution; and,Understand when formal dispute should be considered.The instructional methodology for this course includes lecture, group discussions, case studies, and quizzes. The target audience for this course is federal, state, and tribal representatives who work on Federal Facility cleanups. This course is part of the Federal Facilities Academy training program. Please consider registering for other Federal Facility Academy courses and obtain a certificate upon completion of the entire Federal Facility Academy series (12 courses total). To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/tio/FFAcademy5_061026/

Audio for "ITRC: PFAS Chemistry Explained," Jun 9, 2026

itrc@itrcweb.org (ITRC Training Program) — Tue, 9 Jun 2026 23:00:00 GMT

The Interstate Technology & Regulatory Council (ITRC) is presenting a training on the basics of per- and polyfluoroalkyl substances (PFAS) chemistry. This training supplements the ITRC PFAS Introductory training and ITRC Beyond the Basics Training sessions. You can find ITRC PFAS training resources online at https://pfas-1.itrcweb.org/pfas-training/. PFAS are an emerging group of contaminants that present unique challenges in many areas including: widespread use and presence in the environment, sampling and analysis, fate and transport, and remedial approaches. This training session will provide PFAS practitioners with an understanding of the unique aspects of PFAS chemistry that guide fate and transport, treatment, regulations, and decision-making on PFAS sites. Key focus areas of the training include the following:Why are PFAS different from other organic chemicals?How are PFAS defined?How are PFAS manufactured and why does that matter?What are the differences between perfluoroalkyl and polyfluoroalkyl substances?What are the naming conventions used for the different types of PFAS?How are short-chain and long-chain perfluoroalkyl acids (PFAAs) defined?What are precursors and why are they important?What are some of the unique chemical properties of PFAS and why do they matter?Resources and further details included in this training are in the ITRC Guidance Document (PFAS-1). To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/itrc/PFASChem_060926/

Audio for "Superfund Research Program (SRP) Funding Opportunity Webinar: P42 Multi-Project Center Grants," Jun 3, 2026

henryh@niehs.nih.gov (Heather F. Henry, Ph.D.) — Wed, 3 Jun 2026 23:00:00 GMT

The Superfund Research Program (SRP) is holding a webinar to provide information about the continuation of the Superfund Hazardous Substance Research and Training Program (P42). The Notice of Funding Opportunity (NOFO), RFA-ES-27-004, calls for applications to establish P42 Centers, which support problem-based, solution-oriented research relevant to Superfund. The Centers consist of multiple integrated projects representing both the biomedical and environmental science disciplines. Center cores are also tasked with administrative (that includes Center’s leadership, data management and analysis, and training functions) and translational research and engagement, and as applicable, research support functions. The next application due date is September 25, 2026 (5:00 PM local time of applicant organization). On the webinar, NIEHS staff will provide information and answer questions about the P42 request for application (RFA) to address the broad, complex health and environmental issues that arise from the multimedia nature of hazardous waste sites. To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/tio/SRP-P42_060326/

Audio for "SRP Progress in Research Summer 2026 Webinar Series: Session I," Jun 1, 2026

maura.cavagnaro@nih.gov (Maura Cavagnaro) — Mon, 1 Jun 2026 23:00:00 GMT

This Progress in Research webinar series, hosted by the National Institute of Environmental Health Sciences (NIEHS) Superfund Research Program (SRP), showcases research from 6 schools funded by SRP in 2025. These awards were made as part of the P42 grant solicitation RFA-ES-20-014. In the two-part series, awardees will highlight their research projects, accomplishments, and next steps. The newly funded centers, including Oregon State University, University of North Carolina-Chapel Hill, and University of Southern California, are bringing fresh ideas and approaches to tackle complex problems related to hazardous substances. The Oregon State University (OSU) SRP Center is driven to identify polycyclic aromatic hydrocarbons (PAHs) in the environment, to characterize their toxicity, and to specify the environmental concentrations at which they pose no threat to human health. The OSU SRP Center studies the composition of complex PAH mixtures, the changes in composition after remediation and natural attenuation, and the implications of PAH mixtures for human health. The University of North Carolina (UNC)-Chapel Hill SRP Center addresses serious public health challenges faced by communities in North Carolina and across the nation related to inorganic arsenic (iAs). The UNC-Chapel Hill SRP Center is working to identify these factors that would facilitate the development of novel solutions/interventions to reduce the prevalence of iAs-associated diabetes, as well as other diseases associated with iAs exposure. The University of Southern California (USC) SRP Center works to develop problem-based, solution-oriented scientific knowledge and innovative technologies to address the issue of poly- and perfluoroalkyl substances (PFAS) water contamination in Superfund and other sites. The USC SRP Center has the goal of specifically addressing PFAS in relation to their effects on liver disease and addressing urgent concerns regarding water quality and human health in populations affected by PFAS exposures and Superfund sites. To learn about and register for the other session in this webinar series, please see the SRP website. To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/tio/SRPPIR26_060126/

Audio for "FRTR Spring 2026 General Meeting: Characterizing Groundwater/Surface Water Interfaces for Effective Site Remediation Decisions and Contaminant Cleanup (Session 2)," May 21, 2026

kent.glover@us.af.mil (Kent Glover) — Thu, 21 May 2026 23:00:00 GMT

The FRTR 2026 Spring General Meeting, conducted as two web-based virtual sessions, provides an opportunity to share best technical practices and results of recent technical advances in understanding and characterizing contaminant fate and migration across the GSI. The first virtual session explores current scientific understanding of key hydrological and biogeochemical processes affecting contaminant distribution and transport across a GSI. This session also explores available methods and tools for characterizing contaminant migration across a GSI. The second virtual session provides an overview of recent advances in development of innovative technologies for GSI characterization. The session ends with a discussion of needs for further technological development. To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/tio/FRTRSpring26_052126/

Audio for "FRTR Spring 2026 General Meeting: Characterizing Groundwater/Surface Water Interfaces for Effective Site Remediation Decisions and Contaminant Cleanup (Session 1)," May 20, 2026

kent.glover@us.af.mil (Kent Glover) — Wed, 20 May 2026 23:00:00 GMT

Audio for "ITRC: Introduction to Hydrocarbons," May 19, 2026

itrc@itrcweb.org (ITRC Training Program) — Tue, 19 May 2026 23:00:00 GMT

Petroleum is a complex mixture of many compounds. Regulatory and technical guidance documents commonly focus on the hydrocarbon components of that mixture, or perceived risks that they present. However, focusing on a specific area of concern often causes practitioners to overlook other aspects of a release. For example, concerns related to exposure to total petroleum hydrocarbons (TPH) risks may be overlooked while pursuing concerns related to light non-aqueous phase liquid (LNAPL) recovery or petroleum vapor intrusion (PVI). This class is designed to provide a basic overview of hydrocarbon behavior in the subsurface and how to scientifically assess concerns arising from the release of petroleum products into the environment. It will highlight key issues that help identify and manage TPH, LNAPL, and PVI risks together. Key concepts will include: Fundamentals of petroleum hydrocarbonsPetroleum chemistryHow TPH, LNAPL, and PVI are relatedBuilding an integrated conceptual site model (CSM) What is a CSM…what is its purpose?When is a CSM complete?Identifying and managing the risks from petroleum hydrocarbonsDefining LNAPL risks based on acute, saturation, composition, or aesthetic concernsEmphasize the importance of biodegradation in risk management decision makingHow to select remedial goals and remedies that align with your goals This course is based upon three separate Guidance Documents developed by ITRC that address the course content in detail:Light Non-Aqueous Phase Liquid (LNAPL), LNAPL Site Management: LCSM Evolution, Decision Process, and Remedial Technologies (LNAPL-3) Petroleum Vapor Intrusion (PVI), Fundamentals of Screening, Investigation, and Management (PVI-1) Total Petroleum Hydrocarbon (TPH), TPH Risk Evaluation at Petroleum-Contaminated Sites (TPHRisk-1) To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/itrc/Hydrocarbons_051926/

Audio for "Federal Facilities Online Academy: Federal Facility Five-Year Review," May 13, 2026

Reynolds.John.D@epa.gov (John Reynolds) — Wed, 13 May 2026 23:00:00 GMT

Federal Facility Five-Year Review Webinar is a two-hour webinar course that provides an overview of Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) five-year reviews. By taking this course, participants will achieve the following objectives:Understand Five-Year Review purpose and regulatory contextLearn how to prepare and conduct a five-year reviewIdentify the information and data needed to support a protectiveness statementAddress emerging contaminants and options available to ensure that the federal agencies address these contaminantsIdentify the different scenarios when EPA makes an independent finding of the protectiveness of the remedyLearn about similarities and differences between federal and private site five-year reviewsThe instructional methodology for this course includes lecture, case studies, and quizzes. There will also be an opportunity for participants to ask questions. The target audience for this course are federal, state, and tribal representatives who work on Federal Facility cleanups. Ideally, students should have a basic understanding the CERCLA process. This course is part of the Federal Facilities Academy training program. Please consider registering for other Federal Facility Academy courses and obtain a certificate upon completion of the entire Federal Facility Academy series (12 courses total). To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/tio/FFAcademy1_051326/

Audio for "Understanding Vapor Intrusion -Introductory Concepts & Fundamentals - A Two Part Series: Session 2," May 12, 2026

itrc@itrcweb.org (ITRC Training Program) — Tue, 12 May 2026 23:00:00 GMT

The Vapor Intrusion 101 training series provides an overview of vapor intrusion (VI) and presents information from the 2026 ITRC VI Toolkit (which includes fact sheets, technology information sheets, and checklists). This course introduces participants to the fundamentals of vapor intrusion, the process by which vapor-forming chemicals in contaminated soil or groundwater volatilize and migrate into buildings. The course will discuss sources, pathways, and receptors. It will identify and assess VI risks in various settings (residential, commercial, industrial) and familiarize participants with regulatory frameworks and guidelines (e.g., USEPA, state-specific regulations). The participants will gain working knowledge of how to develop a Conceptual Site Model (CSM), design and implement sampling strategies, establish data quality objectives (DQOs), and conduct data and risk evaluations. It will provide an overview of mitigation strategies, including various closure strategies, land use covenants, and institutional controls. Session 1 will focus on:What is Vapor IntrusionVI Exposure PathwayVI in Practice - including common CSMs, Scenarios, and ChemicalsPotential Limiting Factors for VI - PVI vs Chlorinated VI, Geology, Hydrogeology, and Building Operating ConditionsHow is VI Different & Challenges in Evaluating VI Session 2 will focus on:How VI is DifferentHow to assess VI - CSM, Sample Collection, Data Interpretation, Risk Assessment, and Project Life CycleManaging VI Risk at a Site - Mitigation, Remediation, MonitoringWhat does Closure look like & Various Exit Strategies The course will provide connections to the 2026 ITRC VI Toolkit to help the audience understand how to find and use these new resources for VI sites. To view this archive online or download the slides associated with this seminar, please visit http://clu-in.org/conf/itrc/VI-introductory_051226/

Audio for "ITRC: Contaminants of Emerging Concern (CEC) Identification Framework," May 7, 2026

itrc@itrcweb.org (ITRC Training Program) — Thu, 7 May 2026 23:00:00 GMT

In 2023, the ITRC Contaminants of Emerging Concern (CEC) Framework was published to help environmental regulatory agencies and other stakeholders identify, evaluate, and manage CEC's while acknowledging uncertainties in their environmental fate and transport, receptor exposure, and/or toxicity. Such an approach can be conducive to improved allocation of regulatory response resources and provide a foundation for communicating potential risk to stakeholders. The ITRC framework is comprised of a white paper and four associated fact sheets. In the white paper, CEC are defined as: "substances and microorganisms including physical, chemical, biological, or radiological materials known or anticipated in the environment, that may pose newly identified risks to human health or the environment." The framework is meant to help environmental regulatory agencies and other stakeholders by providing examples of CEC monitoring programs and guiding the user through the process of identifying CEC key characteristics, how to communicate real and perceived risk from CEC to the public, and how laboratory analytical methods can be used in the identification process.The ITRC CEC training presents this entirely new framework for identification, prioritization, and communication of CEC. This course includes the following topics:An overview of the framework, how and why it was developed, the factors that influence the creation of CEC management units at the state level, and a listing of existing CEC monitoring programs.A discussion of key variables that may be used as criteria to identify and prioritize CEC for response actions. This portion of the course includes a case study that illustrates how the identification and prioritization process works with an "unknown" chemical CEC.Practices and methods for stakeholder messaging and how to share incomplete information on CEC that could impact human health and the environment. This portion of the short course builds upon the ITRC Risk Communication Toolkit by providing additional detail addresses communications plans, message maps, and audience identification.A paradigm for how laboratory methods can be used to identify CEC ranging from: "Is compound X in the sample and at what concentration?" (i.e., known knowns) to"Which compounds from the list are in this sample?" (i.e., known unknowns) to"What is in the sample?" (i.e., unknown unknowns). CEC are typically compounds or substances whose occurrence or effect is unknown but may or may not be understood through similar compounds or substances. This module includes a discussion of the use of targeted and untargeted analysis to identify a CEC.Participants will learn the elements of the CEC framework and gain an understanding of the framework application from case studies. Participants are encouraged to review the ITRC CEC Framework prior to the class. To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/itrc/CEC_050726/

Audio for "ITRC: Pump & Treat Optimization," May 5, 2026

itrc@itrcweb.org (ITRC Training Program) — Tue, 5 May 2026 23:00:00 GMT

ITRC's Pump & Treat (P&T) Optimization training aims to summarize existing information and best practices while also developing a systemic and adaptive optimization framework specifically for P&T well-network design and management. P&T systems have been one of the most commonly used methods for hydraulic containment and treatment of contaminated groundwater at sites with large groundwater plumes. This method cleans up groundwater contaminated with dissolved chemicals by pumping groundwater from wells to an above-ground treatment system that removes the contaminants. Optimization of P&T remedies is important for maintaining contaminant removal effectiveness throughout the operation lifetime and managing the system toward an exit strategy. A strategy for routine optimization of P&T remedies is key for maintaining the contaminant removal efficiency of these systems. The primary audience for this training is environmental project decision-makers, which may include federal, state, tribal, and various local agency employees; contractors to these agencies; and potentially liable parties and their engineers and consultants as well as involved stakeholders. Generally, those involved in designing, building and operating, and optimizing pump & treat systems would benefit.The goal of the training is to provide a roadmap for optimizing a P&T system and refining the remedial strategy or shifting toward another remedial approach. Pump & Treat optimization should be systematic and data-based, and the training and document aim to provide tools and direction to assist in this rigorous process.Key TakeawaysUnderstanding the P&T project lifecycle: evaluation, optimization, and transition, as well as considerations for sustainability, resiliency, and regulatory and stakeholder entities.P&T optimization should incorporate adaptive site management. P&T systems are influenced by a diverse collection of outside factors, which should be considered throughout the entire optimization process.Transition and termination should both be considered during the optimization process.Remedial objectives dictate evaluation and optimization efforts for P&T systems..Prior to attending the training class, participants are encouraged to view the associated ITRC Pump & Treat guidance document. To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/itrc/PT-1_050526/

Audio for "Understanding Vapor Intrusion - Introductory Concepts & Fundamentals - A Two Part Series: Session 1," Apr 30, 2026

itrc@itrcweb.org (ITRC Training Program) — Thu, 30 Apr 2026 23:00:00 GMT

Audio for "Federal Facilities Academy: Community Involvement at Federal Facilities," Apr 22, 2026

Reynolds.John.D@epa.gov (John Reynolds) — Wed, 22 Apr 2026 23:00:00 GMT

Community Involvement at Federal Facilities is a two-hour webinar course that focuses on community involvement requirements, resources, and techniques available for Federal Facilities being cleaned up at National Priorities List (NPL) sites under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). By taking the course, participants will achieve the following objectives:Learn about community involvement requirements under CERCLA;Understand the roles of the lead federal agency and the Environmental Protection Agency (EPA) in public involvement at Federal Facilities;Discover resources and tools available for community involvement activities;Explore community involvement techniques and approaches that can be used at Superfund sites; and,Identify community involvement opportunities throughout the Superfund process at Federal Facilities.The instructional methodology for this course includes lecture, case studies, and group discussions. The target audience for this course is federal, state, and tribal representatives who work on Federal Facility cleanups. Ideally, students should have a basic understanding of the CERCLA process. This course is part of the Federal Facilities Academy training program. Please consider registering for other Federal Facility Academy courses and obtain a certificate upon completion of the entire Federal Facility Academy series (12 courses total). To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/tio/FFAcademy8_042226/

Audio for "PFAS Sorption Based Technologies for Separation & Concentration of PFAS from Water," Apr 7, 2026

itrc@itrcweb.org (ITRC Training Program) — Tue, 7 Apr 2026 23:00:00 GMT

Removal of PFAS from water has become an important concern for water utilities; landfill operators; industry professionals; and state, local, and tribal decision makers. Sorption-based technologies, specifically granular activated carbon, ion exchange resins, and foam fractionation have proven to be effective solutions in this area, but choosing the most suitable sorption-based method or system configuration can be daunting. To aid treatment practitioners, the ITRC PFAS team published a technical guidance document titled "Sorption-based Technologies for Separation and Concentration of PFAS from Water" (Section 18 of PFAS-1). This training module is intended to assist in using the information presented in this document by providing an overview of the central topics along with easily digestible summaries of critical information. This training will be crafted for an audience with some basic understanding of PFAS and that has likely already attended the PFAS 101 training and the ITRC PFAS Beyond the Basics: Fate and Transport, Site Characterization, and Source ID training. Resources and further details for the topics included in this training are available in the ITRC PFAS-1 guidance document, specifically in Sections 12 and 18. Learning objectives:Review operating principles of sorption-based technologies.Understand how site conditions and treatment objectives influence technology selection.Become familiar with testing methods (from foamability tests to isotherm tests to full-scale demonstration tests) used to verify treatment effectiveness, optimize performance, and compare technologies. Identify water quality parameters that may adversely affect sorption-based technologies and the available pretreatment methods to address themLearn how test data can be combined with cost and sustainability information to select a specific technology or system configuration. To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/itrc/PFAS-sorption-techs_040726/

Audio for "PFAS - Practical Approaches for PFAS Fate & Transport Evaluation," Mar 26, 2026

itrc@itrcweb.org (ITRC Training Program) — Thu, 26 Mar 2026 23:00:00 GMT

This training will provide information on fate and transport of PFAS in the environment using a hypothetical AFFF release. It builds on the earlier topics covered in the PFAS 101 training. Resources and further details for the topics included in this training are available in the ITRC PFAS-1 guidance document. Representative PFAS fate and transport pathways/processes will be illustrated, highlighting those that are unique to PFAS and different from other common contaminants. Available methods/approaches of field sampling, laboratory analysis, and data evaluation to characterize these fate and transport pathways/processes will be discussed. Data gaps due to limited available sampling/analysis and data evaluation methods will also be discussed. The scenario of a hypothetical AFFF release site was chosen based on commonality with typical known environmental releases to present an illustrative framework for regulators and other environmental practitioners on the range of PFAS topics that may be applicable from discovery to closure. This training will be crafted for an audience with some basic understanding of PFAS and that has likely already attended the PFAS 101 training and the ITRC PFAS Beyond the Basics: Fate and Transport, Site Characterization, and Source ID training. This training will be a site-based, application-oriented training that is built around a specific site narrative. We aim to connect the previous subject-oriented training courses to what practitioners need to think about at a site. Learning Objectives:Understand the interrelationships between current ITRC PFAS knowledge topics in the context of a hypothetical scenario.Understand representative fate and transport processes at a typical AFFF release site; particular focus will be given to PFAS-specific considerationsUnderstand currently available methods/approaches of field sampling, laboratory analysis, and data evaluation for PFAS site characterization, as well as limitations of these methods/approaches To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/itrc/PFAS-fate-transport_032626/

Audio for "Federal Facilities Online Academy: Record of Decision (RODs) and More at Federal Facilities," Mar 25, 2026

Reynolds.John.D@epa.gov (John Reynolds) — Wed, 25 Mar 2026 23:00:00 GMT

RODs [Records of Decision] and More at Federal Facilities is a two-hour webinar course that will provide an overview of how early and interim actions, adaptive management, RODs, Explanations of Significant Differences (ESDs), ROD Amendments, removal actions and Five-Year Reviews are used at Federal Facilities. By taking this course, participants will achieve the following objectives:Understand how removal actions, sampling and analysis plans, and decision documents are used at Federal Facilities;Learn what the critical sections of a decision document are and resources to support writing a decision document;Identify how different types of decision documents can be used as part of an overall cleanup strategy; and,Learn the process for changing remedies after a ROD is issued and how Five-Year Reviews can impact decision documents.The instructional methodology for this course includes lecture, group discussions, case studies, and quizzes. The target audience for this course is federal, state, and tribal representatives who work on Federal Facility cleanups. Ideally, students should have a basic understanding of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) process. This course is part of the Federal Facilities Academy training program. Please consider registering for other Federal Facility Academy courses and obtain a certificate upon completion of the entire Federal Facility Academy series (12 courses total). To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/tio/FFAcademy2_032526/

Audio for "Vapor Intrusion Mitigation (VIM-1) - A Two Part Series: Session 2," Mar 17, 2026

itrc@itrcweb.org (ITRC Training Program) — Tue, 17 Mar 2026 23:00:00 GMT

ITRC's Vapor Intrusion Mitigation training is a series of eight (8) modules, presented over two sessions. If you took the ITRC VIM series previously, the content has stayed the same, but the new course directs people to the Vapor Intrusion (VI) Toolkit resources published in January 2026 by ITRC. The Vapor Intrusion Mitigation training series provides an overview of VIM and presents information from the 2026 ITRC VI Toolkit (which includes fact sheets, technology information sheets, and checklists). Session 1:Introduction & Overview of Vapor Intrusion Mitigation Training TeamConceptual Site Models for Vapor Intrusion MitigationCommunity Engagement During Vapor Intrusion MitigationRapid Response & Ventilation for Vapor Intrusion MitigationRemediation & Institutional Controls Session 2:Active Mitigation ApproachesPassive Mitigation ApproachesSystem Verification, OM&M, Curtailment and Shutdown When certain contaminants or hazardous substances are released into the soil or groundwater, they may volatilize into soil vapor. VI occurs when these vapors migrate up into overlying buildings and contaminate indoor air. The ITRC VI Toolkit combines the previous ITRC VI-related guidance documents (VI 2007, PVI 2014, VIM-1 2020), along with updates, into one comprehensive resource toolkit (including fact sheets, technology information sheets and checklists) published in January 2026. After the Vapor Intrusion Mitigation series, you should understand:How to locate and utilize the relevant document, fact sheets, technology information sheets, and checklistsThe importance of a VI mitigation conceptual site modelHow community engagement for VI mitigation differs from other environmental mattersWhen to implement rapid response for VI 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 curtailment of a mitigation system and shutdown We encourage you to use the ITRC VI Toolkit and these training modules to learn about VI 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 VI 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 VI 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 http://www.clu-in.org/conf/itrc/VIM-1_031726/

Audio for "PFAS & Biosolids: Sources, Occurrence, Transport, and Treatment," Feb 26, 2026

itrc@itrcweb.org (ITRC Training Program) — Thu, 26 Feb 2026 23:00:00 GMT

This ITRC training will provide information on the current understanding of PFAS and biosolids, focusing on land application. It builds on the earlier topics covered in the PFAS 101 training. This training will provide information on potential sources of PFAS in biosolids, the implications of PFAS associated with land-applied biosolids, including leaching and associated risks, and a conceptual site model. It will also cover the nature and extent of PFAS, field and laboratory considerations when assessing land application sites, factors controlling PFAS mobility, PFAS treatment options for biosolids, and PFAS uptake by plants and animals in these settings, along with approaches to modeling that uptake. Resources and further details for the topics included in this training are available in the ITRC PFAS-1 guidance document, specifically in Sections 1.7, 2, 4, 5, 8, 10, 12, and 17.3, as well as in the Regulatory Programs Table. Key topics will include: Understanding the Sources and Types of PFASConsiderations for Evaluating Nature & Extent of PFAS Contamination at Land Application Sites Evaluating Fate and Transport of PFAS in the Environment from Land-Applied BiosolidsEvaluating and Modeling Risk from PFAS in Agricultural Settings Evaluating Treatment and Management Options for PFAS in Biosolids To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/itrc/PFAS-landapp_022626/

Audio for "Federal Facilities Online Academy: Military Munitions Policy Overview," Feb 25, 2026

Reynolds.John.D@epa.gov (John Reynolds) — Wed, 25 Feb 2026 23:00:00 GMT

Military Munitions Policy Webinar is a two-hour webinar course that provides an overview of the Department of Defense (DoD) Military Munitions Response Program (MMRP), munitions policies, and how the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) is applied to munitions sites. By taking this course, participants will achieve the following objectives:Learn about DoD MMRP;Understand the CERCLA process as applied to a munitions site;Understand munitions policies; and,Explore EPA Munitions Frequently Asked Questions (FAQs).The instructional methodology for this course includes lecture, case studies, and quizzes. The target audience for this course are federal, state, and tribal representatives who work on Federal Facility cleanups. Ideally, students should have a basic understanding of munitions and the CERCLA process. This course is part of the Federal Facilities Academy training program. Please consider registering for other Federal Facility Academy courses and obtain a certificate upon completion of the entire Federal Facility Academy series (12 courses total). To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/tio/FFAcademy3_022526/

Audio for "Vapor Intrusion Mitigation (VIM-1) - A Two Part Series: Session 1," Feb 24, 2026

itrc@itrcweb.org (ITRC Training Program) — Tue, 24 Feb 2026 23:00:00 GMT

ITRC's Vapor Intrusion Mitigation training is a series of eight (8) modules, presented over two sessions. If you took the ITRC VIM series previously, the content has stayed the same, but the new course directs people to the Vapor Intrusion (VI) Toolkit resources published in January 2026 by ITRC. The Vapor Intrusion Mitigation training series provides an overview of VIM and presents information from the 2026 Vapor Intrusion (VI) ToolkitITRC VI Toolkit (which includes fact sheets, technology information sheets, and checklists). Session 1:Introduction & Overview of Vapor Intrusion Mitigation Training TeamConceptual Site Models for Vapor Intrusion MitigationCommunity Engagement During Vapor Intrusion MitigationRapid Response & Ventilation for Vapor Intrusion MitigationRemediation & Institutional Controls Session 2:Active Mitigation ApproachesPassive Mitigation ApproachesSystem Verification, OM&M, Curtailment and Shutdown When certain contaminants or hazardous substances are released into the soil or groundwater, they may volatilize into soil vapor. VI occurs when these vapors migrate up into overlying buildings and contaminate indoor air. The ITRC VI Toolkit combines the previous ITRC VI-related guidance documents (VI 2007, PVI 2014, VIM-1 2020), along with updates, into one comprehensive resource toolkit (including fact sheets, technology information sheets and checklists) published in January 2026. After the Vapor Intrusion Mitigation series, you should understand:How to locate and utilize the relevant document, fact sheets, technology information sheets, and checklistsThe importance of a VI mitigation conceptual site modelHow community engagement for VI mitigation differs from other environmental mattersWhen to implement rapid response for VI 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 curtailment of a mitigation system and shutdown We encourage you to use the ITRC VI Toolkit and these training modules to learn about VI 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 VI 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 VI 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 http://www.clu-in.org/conf/itrc/VIM-1_022426/

Audio for "Into the MStC: ASTM's E3488-25 Standard Guide for Moving Sites to Closure (MStC) for Petroleum Underground Storage Tank (UST) Release," Feb 18, 2026

Schruben.Thomas@EPA.gov (Thomas Schruben) — Wed, 18 Feb 2026 23:00:00 GMT

The webinar will introduce the audience to U.S. EPA's Reassessing Exposure Threats from Petroleum Underground Storage Tank Releases policy statement and ASTM's E3488 Standard Guide for Moving Sites to Closure for Petroleum Underground Storage Tank Releases (MStC). We will highlight some of the new science and best practices that form the basis for MStC, changes in practice that MStC recommends, and options for implementation. To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/tio/MSTC-UST_021826/

Audio for "Sediment Cap Chemical Isolation Training," Feb 17, 2026

itrc@itrcweb.org (ITRC Training Program) — Tue, 17 Feb 2026 23:00:00 GMT

In 2023, ITRC published the Sediment Cap Chemical Isolation Guidance to supplement the 2014 Contaminated Sediments Remediation Guidance with the goal of improving consistency in sediment cap performance outcomes. Sediment capping is a commonly selected remediation approach and numerous designs have been completed. Previous cap designs have been evaluated in multiple ways, and these varying approaches have led to some differences in selection of chemical design criteria, construction tolerance specifications, and monitoring/maintenance objectives for sites with similar characteristics and contaminants, leading to different expectations for long-term performance and reliability. The ITRC Sediment Cap Chemical Isolation Guidance provides a framework for the design, construction, and long-term monitoring of the chemical isolation function of sediment caps. The framework consists of an iterative design process informed by site-specific data that balances achievement of chemical design criteria, physical design constraints, constructability and permitting requirements. In addition, the guidance summarizes key construction considerations and presents a recommended approach for monitoring and evaluating long-term chemical isolation performance. The recommended framework presented in the Sediment Cap Chemical Isolation Guidance is illustrated below. The Sediment Cap Chemical Isolation Training will cover several key elements of the recommended framework, including: A capping overview that summarizes objectives of capping, role of the chemical isolation layer, and generic cap types and compositions. A discussion of performance objectives and design concepts that includes the selection of chemical isolation performance targets criteria and development of design criteria while considering the site setting and conceptual site model elements. An overview of chemical isolation layer modeling tools and discussion of their applicability to support chemical isolation design, important model input parameters, and the impact of uncertainty and sensitivity of modeling results. A summary of chemical isolation construction considerations, including an overview of available construction methods and tolerances and quality assurance and quality control measures. A discussion of cap performance monitoring and maintenance objectives and approaches that include developing monitoring objectives to assess chemical isolation performance and methods for guiding long-term maintenance decisions. We encourage participants to review the ITRC Sediment Cap Chemical Isolation Guidance (SD-1) before and after the training to become familiar with the topics and recommendations discussed during the training. This training is intended for all environmental professionals working in the field of sediment capping projects, including regulators and other government agency staff, consultants, project stakeholders, and industry. To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/itrc/sd-1_021726/

Audio for "ITRC: Microplastics," Feb 12, 2026

itrc@itrcweb.org (ITRC Training Program) — Thu, 12 Feb 2026 23:00:00 GMT

In response to one of the biggest emerging environmental concerns, ITRC formed the Microplastics Team in 2021 to develop the Microplastics Guidance Document. Plastics have become pervasive in modern life and are now used in a wide range of commercial and industrial applications. Microplastics may result from the degradation and fragmentation of larger plastics, or they may be intentionally produced for specific applications and products. Regardless of their origin, microplastics are now ubiquitous in our environment. Because of their small size and pervasiveness in the environment, microplastics, along with any other contaminants which are adhered to the microplastics, may be inadvertently consumed by humans and other organisms. The online ITRC Guidance Document is geared toward an audience with reasonable level of scientific understanding, but not microplastic-specific knowledge. The guidance provides a user with information on microplastics and the state of the applied science without having to go to the scientific literature. The target audience for the guidance and this training course includes state regulators and environmental consultants, as well as community and tribal stakeholders. The guidance and this associated training course uses a conceptual site model to navigate microplastics in the environment and explore the following general areas:An introduction to microplastics, their sources, and worldwide distributionThe pathways through which microplastics can enter and travel in the environment and their distribution in various media (water, soil, sediment, air, and biota) A current look at the most common techniques and best practices for sampling and analyzing microplasticsPotential human health and ecological risks associated with microplastics in the environmentAn overview of existing regulations related to microplastics and macroplastics at the state, federal, and international levelsExamples of prevention and mitigation strategies and best management practices to reduce microplastics from entering the environment and the emerging technologies to abate, treat, and remediate microplastics once they exist in the environment Identification of data gaps and the need for further researchSeveral case studies illustrating a range of current microplastics-related topicsPrior to attending the training class, participants are encouraged to view the associated ITRC Microplastics Guidance Document. To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/itrc/Microplastics_021226/

Audio for "ITRC: PFAS Chemistry Explained," Jan 27, 2026

itrc@itrcweb.org (ITRC Training Program) — Tue, 27 Jan 2026 23:00:00 GMT

Audio for "From Cells to Solutions: Emerging Tools for Studying Health and Disease — Session III," Jan 21, 2026

mali.velascodelgado@nih.gov (Mali Velasco) — Wed, 21 Jan 2026 23:00:00 GMT

The National Institute of Environmental Health Sciences (NIEHS) Superfund Research Program (SRP) is hosting a Risk e-Learning webinar series focused on the use of innovative, human-relevant technologies to better characterize the biological effects of chemicals. New technologies, including advanced cell-based assays, organoids, and computational modeling approaches, are expanding the toolbox researchers use to answer previously difficult or unanswerable questions. Presenters will discuss how these emerging methodologies are being applied to uncover mechanistic insights, improve predictive accuracy for human health outcomes, and refine risk assessment frameworks. The third and final session, titled Innovative Methods for Understanding Chemical Toxicity, will feature three speakers discussing innovative approaches to understanding the dose at which chemicals trigger biological responses and the mechanisms behind them. Speakers include:Ana Maretti Garcia, Ph.D., University of Southern California: In this presentation, Dr. Maretti Garcia will discuss recent advances using advanced 3D human liver spheroid models to characterize the biological effects of multiple per- and polyfluoroalkyl substances (PFAS) on human liver metabolism and their contribution to metabolic dysfunction-associated steatotic liver disease (MASLD). She will highlight key findings recently published in Environment International (PMID: 40914107) and Communications Medicine (PMID: 41162609), focusing on molecular and cellular mechanisms identified through the integration of in vitro models with human-relevant data.Guru Ulaganathan, Duke University: Developmental neurotoxicity (DNT) is challenging to study due to the intricacy of human brain development, the dependence on the timing of exposure, and the emergence of effects long after the initial exposure. This presentation will discuss advances in human iPSC modeling using three-dimensional brain models that can be leveraged to mechanistically investigate neurodevelopmental perturbations at both a molecular and functional level.Weihseuh A. Chiu, Ph.D., Texas A&M University: Chemical contamination after disasters presents a plethora of challenges to risk assessment and risk management. Dr. Chiu will present several case studies from the Texas A&M Superfund Research Center of new approach methodologies (NAMs) to address this challenge by rapidly characterizing hazards and risks from individual chemicals and environmental mixtures. Lessons learned from these studies inform a general strategy for NAMs-based solutions for next generation risk assessment. To learn more about and register for the other sessions in this webinar series, please see the SRP site. To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/tio/SRP-BioChem-3_012126/

Audio for "From Cells to Solutions: Emerging Tools for Studying Health and Disease — Session II," Jan 16, 2026

mali.velascodelgado@nih.gov (Mali Velasco) — Fri, 16 Jan 2026 23:00:00 GMT

The National Institute of Environmental Health Sciences (NIEHS) Superfund Research Program (SRP) is hosting a Risk e-Learning webinar series focused on the use of innovative, human-relevant technologies to better characterize the biological effects of chemicals. New technologies, including advanced cell-based assays, organoids, and computational modeling approaches, are expanding the toolbox researchers use to answer previously difficult or unanswerable questions. Presenters will discuss how these emerging methodologies are being applied to uncover mechanistic insights, improve predictive accuracy for human health outcomes, and refine risk assessment frameworks. The second session, titled 3D Models and Technologies to Illuminate Biological Effects of Contaminants, will feature three speakers discussing 3D models and other technologies to better understand how contaminants like polycyclic aromatic hydrocarbons and endocrine-disrupting compounds affect DNA, placental function, and asthma. Speakers include: Stephen Ferguson, Ph.D., NIEHS Division of Translational Toxicology: This presentation will describe active NIEHS/DTT research to develop and innovatively apply microphysiological systems (MPS) to understand PFAS bioaccumulation and toxicity potential in context with human drugs. Research highlights from a recent publication in Environmental Science & Technology (PMID: 39893674) will be provided along with future considerations and strategies for modeling toxicological phenotypes and interindividual susceptibility with MPS. Susan Tilton, Ph.D., Oregon State University: Critical data gaps exist regarding toxicity of the broader class of structurally diverse, substituted polycyclic aromatic hydrocarbons (PAHs) and the ways in which PAHs contribute to toxicity of mixtures for effective evaluation of human health risk. Dr. Tilton will discuss how the development and application of 3D lung cell models can be used to understand risk for toxicity after inhalation exposure in susceptible individuals, as well as efforts to develop a dosimetry model to improve extrapolation and risk assessment from in vitro systems. Arum Han, Ph.D., Texas A&M University: Dr. Han will introduce microphysiological systems (MPS) of the feto-maternal interface that mimics the structure and functions of the multi-cellular layers in these fetal membrane and placental interfaces, and show how they can be used to provide better mechanistic understanding on how environmental toxicants may contribute to preterm birth risk. He will also discuss the latest engineering advancements in making these MPS models into higher throughput more automatically operated models to increase the usability and adoptability of these new approach methods (NAMs). To learn more about and register for the other sessions in this webinar series, please see the SRP site. To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/tio/SRP-BioChem-2_011626/