Contaminated Site Clean-up Information (clu-in): Internet Seminar Audio Archives

In October 2024, ITRC released the 6PPD & 6PPD-quinone Guidance Document to provide environmental professionals and communities with information about the current science and regulatory framework of 6PPD and 6PPD-quinone (6PPD-q). 6PPD-q is a contaminant of emerging concern and is a transformation product of the tire anti-degradant (6PPD), an antiozonant used in tires. Join us for this ITRC training course to get a basic overview of the science and policy measures surrounding the Tire Anti-Degradants 6PPD and 6PPD-q. Attendees will gain insight into the current state of knowledge on topics such as: background and use of 6PPD in tires, toxicity in aquatic species and humans; occurrence, fate, and transport; measuring, mapping, and sampling; mitigation measures; and policy, regulations, and laws. Currently, 6PPD is used in all tires and can contaminate stormwater and surface water anywhere tires are used. 6PPD-q was identified as a chemical fatal to coho salmon in 2020. Since that time, it has been documente

This presentation will cover fundamental concepts on groundwater fate and transport modeling along with examples of different models. Additionally, the complexity of modeling leaching of PFAS compounds in subsurface will be presented. To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/tio/GW-PFAS-Modeling_043025/

M2S2 will be presenting three webinars in FY25, titled "Sessions from the STAND DOWN" highlighting presentations from the FY25 M2S2 Stand Down hosted by US Army Corps of Engineers (USACE) in December 2024. These online events will bring together USACE, DoD leaders, federal land managers, state and federal regulators and contractors to discuss munitions response cleanup issues and initiatives.  Presenters and attendees will discuss programmatic information, and share lessons learned to foster strong working relationships. The first webinar in this series will focus on Remedial Actions and include the following presentations:"RA Lessons learned" — Elise Goggin"Regulatory perspective on ROD's" — Jeff Swanson "Common challenges implementing the remedy" — DJ Myers"Records we need in the Record of Decision" — Nancy Heflin To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/tio/STAND-DOWN-1_042925/

This training class builds on the earlier information for fate and transport and site characterization presented in the PFAS 101 CLU-IN training. It provides more in-depth information for fate and transport, site characterization, source identification and some introductory information on environmental forensics. These topics will be presented along with options and a framework for data visualization. This training will focus largely on PFAS fate and transport in groundwater. The goal is to provide detailed information about the inputs practitioners can use to develop a robust conceptual site model to help understand fate and transport at PFAS sites, and how to gather evidence of multiple sources. Resources and further details for the topics included in this training are in the ITRC Guidance Document (PFAS-1) in Sections 2.6, 3, 4, 5, 10, 11 and 15 along with referenced tables. Learning Objectives: Understand fate and transport processes that are unique to PFAS due to their physical and chemical properties

The EPA Superfund Redevelopment Program's mission is to protect human health and the environment and promote the reuse of Superfund sites. Restoring these once-contaminated properties to productive use revitalizes local economies and prioritizes economic prosperity, spurring new jobs, business growth, tax revenues, spending and new amenities for communities.   This webinar showcases the economic benefits of Superfund Redevelopment for communities across the country. Participants will hear about the most up-to-date economic numbers and success stories. They will also learn about tools used at Superfund sites to ensure that reuse projects meet local needs and reflect community priorities, as part of restoring the greatness of the American economy. To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/tio/superfund-redevelopment_042325/

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 co

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…

This virtual training will discuss the updated Framework for Investigating Asbestos-Contamination at Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) Sites (released in 2021). By taking this training, participants will learn how to better assess exposure and risk from asbestos and consider unique scientific and technical issues associated with the investigation of human exposure and risk from asbestos. The training modules will discuss specific strategies that are based on the best currently available science as well as methods for characterizing exposure and risk from asbestos to inform risk-management. The course also presents:A flow diagram for asbestos site assessment and removal action and remedial action decisionsThe application of activity-based sampling (ABS) to evaluate the asbestos exposure potential at a site in support of risk-based removal and remedial decisionsResources for asbestos sample collection and analysisA definition of phase contrast microscopy equivalent

This virtual training will discuss the updated Framework for Investigating Asbestos-Contamination at Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) Sites (released in 2021). By taking this training, participants will learn how to better assess exposure and risk from asbestos and consider unique scientific and technical issues associated with the investigation of human exposure and risk from asbestos. The training modules will discuss specific strategies that are based on the best currently available science as well as methods for characterizing exposure and risk from asbestos to inform risk-management. The course also presents:A flow diagram for asbestos site assessment and removal action and remedial action decisionsThe application of activity-based sampling (ABS) to evaluate the asbestos exposure potential at a site in support of risk-based removal and remedial decisionsResources for asbestos sample collection and analysisA definition of phase contrast microscopy equivalent

Performance data for treatment technologies such as permeable reactive barriers, chemical oxidation, and chemical or biological reductive dechlorination suggests there are factors that may consistently impact the effectiveness of groundwater remediation at sites with volatile organic contamination. Aquifer and remedy geochemistry, site characterization, and implementation issues are factors that have impacted groundwater remedy performance at a number of sites. After illustrating these performance factors through case studies, we will cover tips and tricks that can be used to increase the likelihood of a successful groundwater remedy. To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/tio/GW-Remedy-Selection_040225/

The ITRC Managed Aquifer Recharge (MAR-1) Training is intended for state regulators and stakeholders who may not be familiar with the opportunities and challenges associated with MAR. It provides a basic understanding of MAR concepts, along with case studies, that showcase examples of successful MAR applications. For those who are familiar with MAR, the training gives an overview of the components of the MAR process along with the important considerations associated with each component necessary for the design and implementation of a MAR project. It is important to understand that MAR is an area of active research and expanding practical applications, and that this management process is continuing to evolve with time.The combination of climate change and growing demand for fresh water has resulted in an increase in the vulnerability and scarcity of freshwater supplies around the world. The need for fresh water to grow crops and provide for the welfare of the general population, economic growth, and ecosystem

This training class builds on the earlier information for introductory PFAS topics presented in the PFAS 101 CLU-IN training. It provides more in-depth information for human health effects, ecological toxicity and ecological risk assessment, PFAS regulations, and AFFF alternatives and replacement. Resources and further details for the topics included in this training are in the published PFAS-1 guidance document in Sections 7, 8 and 17.2 along with referenced tables. Learning Objectives: Discuss new information on the health effects of categories of PFAS not previously addressed. We'll also talk about the recent use of data from epidemiology studies to develop toxicity factors and guidelines; describe how the U.S. EPA has recently used a mixtures approach to derive a proposed MCL for 4 PFAS. We'll discuss why certain agencies are regulating PFAS as a class, and give examples, and will also give brief updates on our understanding of the adverse effects of PFAS after inhalation or dermal exposure.Discuss P

This webinar will discuss groundwater and surface water interactions in two presentations: Part I: Introduction (Judy Canova) Typical interactions between groundwater and surface water may vary in different regions depending on the types of climate that occur. This introduction focuses on principles and rudimentary cost-effective techniques that can be used to evaluate groundwater-surface water interactions with the expectation that groundwater discharge to surface water is typically not homogeneous and diffuse but rather heterogeneous and focused on preferential pathways of discharge. Case studies illustrating the evaluation of groundwater and surface water will be presented to demonstrate principles of characterization as well as the concepts of heterogeneity. Part II: Bonita Peak Case Study and CSM (Ian Bowen) This presentation will cover a geophysics characterization approach used to understand ground water/surface water interactions at the Bonita Peak Mining District Superfund Site, and the impact the

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

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

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

In 2020, ITRC's 1,4-Dioxane team created multiple tools and documents that provide information to assist all interested stakeholders in understanding this contaminant and for making informed, educated decisions. Since the 1950s, 1,4-Dioxane has seen widespread use as a solvent stabilizer. The use of solvents through the 1980s suggests its presence at thousands of solvent sites in the US; however, it is not always a standard compound in typical analytical suites for hazardous waste sites, so it previously was overlooked. The U.S. EPA has classified 1,4-Dioxane as "likely to be carcinogenic to humans." Some states have devised health standards or regulatory guidelines for drinking water and groundwater standards; these are often sub-part per billion values. These low standards present challenges for analysis, characterization, and remediation of 1,4-Dioxane. The 1,4-Dioxane: Science, Characterization & Analysis, and Remediation training is a series of six (6) modules. The six individual modules will be presen

Per- and polyfluoroalkyl substances (PFAS) are a large and complex class of anthropogenic compounds whose prevalence in the environment are an emerging, worldwide priority in environmental and human health. The ITRC PFAS Team, formed in 2017, has prepared readily accessible materials to present PFAS information to stakeholders, regulators, and policy makers. The PFAS team represents a diverse cross-section of expertise and experience working on PFAS. This training will include emerging science on PFAS, including topics such as Properties of PFAS, Fate and Transport, Sampling and Analysis, and Treatment Technologies. The technical presentations will be focused on those who are relatively new to PFAS. The training will last approximately 90 minutes and include time for questions. To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/itrc/PFAS-Introductory_012825/

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 c

In October 2024, ITRC released the 6PPD & 6PPD-quinone Guidance Document to provide environmental professionals and communities with information about the current science and regulatory framework of 6PPD and 6PPD-quinone (6PPD-q). 6PPD-q is a contaminant of emerging concern and is a transformation product of the tire anti-degradant (6PPD), an antiozonant used in tires. Join us for this ITRC training course to get a basic overview of the science and policy measures surrounding the Tire Anti-Degradants 6PPD and 6PPD-q. Attendees will gain insight into the current state of knowledge on topics such as: background and use of 6PPD in tires, toxicity in aquatic species and humans; occurrence, fate, and transport; measuring, mapping, and sampling; mitigation measures; and policy, regulations, and laws. Currently, 6PPD is used in all tires and can contaminate stormwater and surface water anywhere tires are used. 6PPD-q was identified as a chemical fatal to coho salmon in 2020. Since that time, it has been documente