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Training Classes and Materials

Information on Triad training classes and associated presentation materials are available via this section.

Upcoming Internet Seminars

Archived Internet Seminars

Training Presentation Slides

Workshops/Conferences

Upcoming Internet Seminars

Federal Facilities Online Academy: Record of Decision (RODs) and More at Federal Facilities – U.S. EPA Office of Superfund and Emergency Management (OSEM)
March 25, 2026, 1:00PM-3:00PM EDT, 17:00-19:00 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).

http://www.clu-in.org/live/
Federal Facilities Academy: Community Involvement at Federal Facilities – U.S. EPA Office of Superfund and Emergency Management (OSEM)
April 22, 2026, 1:00PM-3:00PM EDT, 17:00-19:00 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).

http://www.clu-in.org/live/
Federal Facilities Online Academy: Federal Facility Five-Year Review – U.S. EPA Office of Superfund and Emergency Management (OSEM)
May 13, 2026, 1:00PM-3:00PM EDT, 17:00-19:00 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 context
- Learn how to prepare and conduct a five-year review
- Identify the information and data needed to support a protectiveness statement
- Address emerging contaminants and options available to ensure that the federal agencies address these contaminants
- Identify the different scenarios when EPA makes an independent finding of the protectiveness of the remedy
- Learn about similarities and differences between federal and private site five-year reviews
The 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).

http://www.clu-in.org/live/
Federal Facilities Online Academy: Resolving Issues before Formal Dispute – U.S. EPA Office of Superfund and Emergency Management (OSEM)
June 10, 2026, 1:00PM-3:00PM EDT, 17:00-19:00 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).

http://www.clu-in.org/live/
Federal Facilities Academy: Land Use and Onsite/Offsite Determinations – U.S. EPA Office of Superfund and Emergency Management (OSEM)
July 22, 2026, 1:00PM-3:00PM EDT, 17:00-19:00 GMT
Determining Land Use and Onsite/Offsite Determinations is a two-hour webinar course that provides an overview of land use determinations under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). Reasonably anticipated future land use at CERCLA sites is important in determining the appropriate extent of remediation. Onsite and offsite determinations impact the need for permits and offsite transfer of CERCLA wastes. By taking this course, participants will achieve the following objectives:
- Identify factors that influence land use determinations under CERCLA;
- Explore Environmental Protection Agency (EPA) guidance and policy related to land use determinations;
- Learn about onsite permit requirements and exemptions at Federal Facilities; and,
- Understand off-site determinations and the Off-Site Rule and how these differ from on-site determinations.
The instructional methodology for this course includes lecture and group discussion. 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 land use 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).
http://www.clu-in.org/live/
Federal Facilities Online Academy: Groundwater Policy Overview – U.S. EPA Office of Superfund and Emergency Management (OSEM)
August 26, 2026, 1:00PM-3:00PM EDT, 17:00-19:00 GMT
Groundwater Policy and Federal Facilities Overview is a two-hour webinar course that provides an overview of U.S Environmental Protection Agency (EPA) groundwater policies and guidance with emphasis on cleanups at federal facilities. By taking this course, participants will achieve the following objectives:
- Identify EPA groundwater policies;
- Understand groundwater classification and beneficial use in restoration objectives;
- Understand nature and extent considerations from groundwater contaminant plumes;
- Explore applicable or relevant and appropriate requirements (ARARs) commonly associated with groundwater remedies;
- Identify groundwater considerations for monitored natural attenuation (MNA), institutional controls, and technical impracticability waivers; and,
- Discover information on major groundwater policies from other federal agencies, such as Department of Defense (DoD) and Department of Energy (DoE).
The instructional methodology for this course includes lecture 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 the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). 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).

http://www.clu-in.org/live/
Federal Facilities Online Academy: RCRA/CERCLA Integration – U.S. EPA Office of Superfund and Emergency Management (OSEM)
September 23, 2026, 1:00PM-3:00PM EDT, 17:00-19:00 GMT
RCRA and CERCLA Integration at Federal Facilities is a two-hour webinar course that will provide an overview of how the Resource Conservation and Recovery Act (RCRA) and the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) can be integrated at Federal Facilities through use of Federal Facility Agreements, regulator coordination, and lead regulator approach. By taking this course, participants will achieve the following objectives:
- Learn about Federal Facility Agreements and how they identify RCRA and CERCLA roles and responsibilities;
- Explore relevant memos and policies addressing RCRA and CERCLA coordination; and,
- Become familiar with some RCRA policies that apply to CERCLA wastes.
The instructional methodology for this course includes lecture, 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 RCRA and CERCLA. 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).

http://www.clu-in.org/live/
Federal Facilities Online Academy: Role of Superfund Performance Measures – U.S. EPA Office of Superfund and Emergency Management (OSEM)
October 28, 2026, 1:00PM-3:00PM EDT, 17:00-19:00 GMT
Role of Superfund Performance Measures is a two-hour webinar course that will identify the role of performance measures, including environmental indicators, how to justify their status, and how to achieve an under-control status at Superfund sites. By taking this course, participants will achieve the following objectives:
- Discover the origin and role of Government Performance and Results Act (GPRA) Measures;
- Explore the different types of internal Environmental Protection Agency (EPA) planning targets reported through the Superfund Enterprise Management System (SEMs) database; and,
- Learn about Environmental Indicators for Human Exposure and Groundwater Migration and how they are determined.
The instructional methodology for this course includes lecture, group discussion, 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).

http://www.clu-in.org/live/
Federal Facilities Online Academy: Coordinating with Tribes at Federal Facilities – U.S. EPA Office of Superfund and Emergency Management (OSEM)
November 18, 2026, 1:00PM-3:00PM EST, 18:00-20:00 GMT
Coordinating with Tribes at Federal Facilities is a two-hour webinar course that will provide an overview of Environmental Protection Agency (EPA) policy on consultation and coordination with Indian Tribes at federal facilities. This webinar will also provide tips on how to work more collaboratively during this process. By taking this course, participants will achieve the following objectives:
- Identify EPA processes and policies for interacting with the Tribes;
- Understand the roles of EPA and tribal governments in Federal Facility clean ups;
- Learn about the Federal Facilities Restoration and Reuse Office (FFRRO); and,
- Discover EPA resources and tools available to assist Federal Facilities in building partnerships with the Tribes;
The instructional methodology for this course includes lecture, group discussions, and case studies. 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).

http://www.clu-in.org/live/
Federal Facilities Online Academy: Determining Applicable or Relevant and Appropriate Requirements (ARARs) in RODs – U.S. EPA Office of Superfund and Emergency Management (OSEM)
December 2, 2026, 1:00PM-3:00PM EST, 18:00-20:00 GMT
Determining ARARs at Federal Facility Sites is a two-hour webinar course that will highlight how to determine Applicable or Relevant and Appropriate Requirements (ARARs) in decision-documents based on Environmental Protection Agency (EPA) guidance, identify commonly used ARARs, and when to involve partners. By taking this course, participants will achieve the following objectives:
- Understand the general procedures for ARAR identification, analysis, and documentation;
- Learn about ARARs under Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) Section 121(d) and associated EPA guidance;
- Identify the three types of ARARs and how they are determined; and,
- Explore CERCLA ARAR waiver criteria and the six waivers identified under CERCLA 121(d).
The instructional methodology for this course includes lecture 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 ARARs 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).

http://www.clu-in.org/live/
ITRC: Reuse of Solid Mining Waste – Interstate Technology and Regulatory Council
March 12, 2026, 1:00PM-3:00PM EDT, 17:00-19:00 GMT
Solid mining waste represents a significant quantity of waste material in the United States and around the world. Solid mining waste has a range of physical and chemical properties that make it both potentially valuable and potentially hazardous to human health and the environment. From a commercial perspective, mining removes most of the primary minerals of interest; however, waste materials can still contain valuable minerals and other materials that can be recovered. The different types of mining sites and potential wastes for reuse provide a significant challenge but also an opportunity for innovation.

Improvements in extraction and mineral processing technologies have occurred over time making it possible to recover minerals present in low concentrations. Interest in trace metals and rare earth elements (REEs) has increased, especially with the drive towards renewable energy sources increasing demand for key minerals required for solar panels and batteries. The reuse of solid mining waste can consist of reprocessing and repurposing the waste for resource recovery or a new application or product. This reuse serves as a solution to two significant needs:
- a domestic supply of minerals and materials for sustainable development and national defense purposes
- the reclamation and remediation of land to reduce risks to human and environmental health
The ITRC Reuse of Solid Mining Waste training and guidance document is geared towards state regulators and environmental consultants, mining and manufacturing stakeholders, community and tribal stakeholders, and other who have an interest in the potential reuse of solid mining waste.

The guidance and this associated training course includes:
- Mining wastes introduction
- Considerations for reusing mining waste: waste characterization, economic and market considerations, life cycle and risk assessment, regulatory considerations, & stakeholder considerations
- Potential applications for the reuse of solid mining waste: examples of construction, environmental, and industrial reuses
- Review of technologies used in mineral beneficiation and processing
Additionally, the guidance includes several case studies illustrating a range of current mining waste reuse scenarios. Prior to attending the training class, participants are encouraged to view the associated ITRC Reuse of Solid Mining Waste document.
http://www.clu-in.org/live/
Vapor Intrusion Mitigation (VIM-1) - A Two Part Series: Session 2 – Interstate Technology and Regulatory Council
March 17, 2026, 1:00PM-3:00PM EDT, 17:00-19:00 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 Team
- Conceptual Site Models for Vapor Intrusion Mitigation
- Community Engagement During Vapor Intrusion Mitigation
- Rapid Response & Ventilation for Vapor Intrusion Mitigation
- Remediation & Institutional Controls

Session 2:

Active Mitigation Approaches
Passive Mitigation Approaches
System 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 checklists
The importance of a VI mitigation conceptual site model
How community engagement for VI mitigation differs from other environmental matters
When to implement rapid response for VI and applicable methodologies
The differences between remediation, mitigation, and institutional controls
Available technologies for active and passive mitigation, and design considerations for various approaches
How/when/why different mitigation technologies are appropriate
How 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.

http://www.clu-in.org/live/

PFAS - Practical Approaches for PFAS Fate & Transport Evaluation – Interstate Technology and Regulatory Council
March 26, 2026, 1:00PM-3:00PM EST, 17:00-19:00 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 considerations
Understand currently available methods/approaches of field sampling, laboratory analysis, and data evaluation for PFAS site characterization, as well as limitations of these methods/approaches

http://www.clu-in.org/live/

PFAS Sorption Based Technologies for Separation & Concentration of PFAS from Water – Interstate Technology and Regulatory Council
April 7, 2026, 1:00PM-3:00PM EST, 17:00-19:00 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 them
Learn how test data can be combined with cost and sustainability information to select a specific technology or system configuration.

http://www.clu-in.org/live/

Understanding Vapor Intrusion - Introductory Concepts & Fundamentals - A Two Part Series: Session 1 – Interstate Technology and Regulatory Council
April 30, 2026, 1:00PM-3:00PM EST, 17:00-19:00 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 Intrusion
- VI Exposure Pathway
- VI in Practice - including common CSMs, Scenarios, and Chemicals
- Potential Limiting Factors for VI - PVI vs Chlorinated VI, Geology, Hydrogeology, and Building Operating Conditions
- How is VI Different & Challenges in Evaluating VI
Session 2 will focus on:
- How VI is Different
- How to assess VI - CSM, Sample Collection, Data Interpretation, Risk Assessment, and Project Life Cycle
- Managing VI Risk at a Site - Mitigation, Remediation, Monitoring
- What 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.
http://www.clu-in.org/live/
ITRC: Pump & Treat Optimization – Interstate Technology and Regulatory Council
May 5, 2026, 1:00PM-3:00PM EST, 17:00-19:00 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 Takeaways
- Understanding 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
.
http://www.clu-in.org/live/
ITRC: Contaminants of Emerging Concern (CEC) Identification Framework – Interstate Technology and Regulatory Council
May 7, 2026, 1:00PM-3:00PM EDT, 17:00-19:00 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:
1. 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.
2. 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.
3. 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.
4. 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.

http://www.clu-in.org/live/
Understanding Vapor Intrusion -Introductory Concepts & Fundamentals - A Two Part Series: Session 2 – Interstate Technology and Regulatory Council
May 12, 2026, 1:00PM-3:00PM EST, 17:00-19:00 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 Intrusion
- VI Exposure Pathway
- VI in Practice - including common CSMs, Scenarios, and Chemicals
- Potential Limiting Factors for VI - PVI vs Chlorinated VI, Geology, Hydrogeology, and Building Operating Conditions
- How is VI Different & Challenges in Evaluating VI
Session 2 will focus on:
- How VI is Different
- How to assess VI - CSM, Sample Collection, Data Interpretation, Risk Assessment, and Project Life Cycle
- Managing VI Risk at a Site - Mitigation, Remediation, Monitoring
- What 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.
http://www.clu-in.org/live/
ITRC: Introduction to Hydrocarbons – Interstate Technology and Regulatory Council
May 19, 2026, 1:00PM-3:00PM EDT, 17:00-19:00 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 hydrocarbons
- Building an integrated conceptual site model (CSM)
- Identifying and managing the risks from petroleum hydrocarbons
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)
http://www.clu-in.org/live/
ITRC: PFAS Chemistry Explained – Interstate Technology and Regulatory Council
June 9, 2026, 1:00PM-3:00PM EDT, 17:00-19:00 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).
http://www.clu-in.org/live/

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Archived Internet Seminars

Characterization Approaches for Various Types of NAPLs - U.S. EPA Office of Research and Development, Archive of Dec 19, 2024 Seminar

http://www.cluin.org/live/archive/#20241219

SRP Water Innovation - An Integrated Approach to Sustainable Solutions: Session II - Technologies for Water Remediation - NIEHS Superfund Research Program, Archive of Jun 20, 2016 Seminar

http://www.cluin.org/live/archive/#20160620

Implementation of Triad for Petroleum Brownfield's Cleanup and Reuse - US EPA Technology Innovation and Field Services Division, Archive of Jan 26, 2010 Seminar

http://www.cluin.org/live/archive/#20100126

Triad Month Session 7: Dynamic Work Strategies - U.S. EPA Technology Innovation and Field Services Division, Archive of Aug 25, 2009 Seminar

http://www.cluin.org/live/archive/#20090825

Triad Month Session 6: Triad Case Studies - U.S. EPA Technology Innovation and Field Services Division, Archive of Aug 20, 2009 Seminar

http://www.cluin.org/live/archive/#20090820

Triad Month Session 5: Triad Implementation - U.S. EPA Technology Innovation and Field Services Division, Archive of Aug 18, 2009 Seminar

http://www.cluin.org/live/archive/#20090818

Triad Month Session 4: Triad Measurement Techniques - U.S. EPA Technology Innovation and Field Services Division, Archive of Aug 13, 2009 Seminar

http://www.cluin.org/live/archive/#20090813

Triad Month Session 3: Triad During RD/RA - U.S. EPA Technology Innovation and Field Services Division, Archive of Aug 11, 2009 Seminar

http://www.cluin.org/live/archive/#20090811

Triad Month Session 2: Triad Communications and Systematic Planning - U.S. EPA Technology Innovation and Field Services Division, Archive of Aug 6, 2009 Seminar

http://www.cluin.org/live/archive/#20090806

Triad Month Session 1: Introduction to Triad - U.S. EPA Technology Innovation and Field Services Division, Archive of Aug 4, 2009 Seminar

http://www.cluin.org/live/archive/#20090804

Triad: Beyond Characterization to Long-term Management of Groundwater Contaminant Plumes - U.S. EPA Technology Innovation Program, Archive of Sep 12, 2008 Seminar

http://www.cluin.org/live/archive/#20080912

Demystifying the DMA (Demonstration of Method Applicability) - U.S. EPA Technology Innovation and Field Services Division, Archive of Jul 28, 2008 Seminar

http://www.cluin.org/live/archive/#20080728

Management and Interpretation of Data Under a Triad Approach - U.S. EPA Technology Innovation and Field Services Division, Archive of May 22, 2008 Seminar

http://www.cluin.org/live/archive/#20080522

Triad Approach: A New Paradigm for Environmental Project Management - Interstate Technology and Regulatory Council, Archive of Feb 10, 2005 Seminar

http://www.cluin.org/live/archive/#20050210

The Triad Approach to Better Cleanup Projects: Illustrated with the Tree Fruit Case Study - U.S. Army Corps of Engineers and U.S. EPA, Technology Innovation Office, Archive of Jan 23, 2003 Seminar

http://www.cluin.org/live/archive/#20030123

Field-Based Geophysical Technologies Online Seminar - U.S. EPA, Technology Innovation Office, Archive of Dec 12, 2001 Seminar

http://www.cluin.org/live/archive/#20011212

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Training Presentation Slides

The links below lead to Triad training materials (PowerPoint presentations, video clips, etc.) developed by members of the Triad working group.

Triad Course Delivery at the National Site Assessment Symposium, June 28, 2004, San Diego, – USEPA, PPT slides for modules of the full-day delivery of training and case studies.

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Workshops/Conferences

Triad presentations and workshops are scheduled at a variety of venues over the next several months.

Triad Investigations: New Approaches and Innovative Strategies, Amherst, MA, June 10-12, 2008
The national conference included training sessions, workshops, and platform sessions focused on implementation of new tools, approaches, and strategies for hazardous waste site characterization, site remediation, and site redevelopment. Equipment demonstrations augmented the exhibitions to bring practical applications to the technical theory and case studies presented during the conference. The conference featured cutting edge tools and techniques for sampling and monitoring related to real-time information, continuous monitoring, and long-term monitoring for site closure and stewardship. Best practices and lessons learned were emphasized throughout the training sessions, platform sessions, and workshops
http://www.umass.edu/tei/conferences/presentations.html

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