EPA's new Superfund Redevelopment Mapper is an interactive tool that provides information related to reuse and redevelopment on and near Superfund sites. This webinar will review how the tool highlights key data stakeholders need to plan for future Superfund site use. Data layers in the tool include key environmental, population and infrastructure data for identifying and analyzing redevelopment opportunities and potential environmental justice concerns at or near Superfund sites. This webinar will include an interactive training on how to use the tool in a variety of scenarios.

1,4-Dioxane has seen widespread use as a solvent stabilizer since the 1950s. The widespread 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 ITRC team created multiple tools and documents that provide information to assist all interested stakeholders in understanding this contaminate and for making informed, educated decisions.

The 1,4-Dioxane: Science, Characterization & Analysis, and Remediation training is a series of six (6) modules. The six individual modules will be presented together live, and then archived on the ITRC 1,4-Dioxane training webpage for on demand listening.

The modular 1,4-Dioxane training series provides an overview of 1,4-dioxane and presenting six sections from the ITRC guidance document (1,4d-1, 2021):

• History of Use and Potential Sources (Sect 1)
• Regulatory Framework (Sect 2)
• Fate and Transport (Sect 3)
• Sampling and Analysis (Sect 4)
• Toxicity and Risk Assessment (Sect 5)
• Remediation and Treatment Technologies (Sect 6)

• The history of 1,4-dioxane manufacturing and usage and the potential sources of releases of 1,4-dioxane to the environment.
• Primary state and U.S. federal regulatory programs of relevance to 1,4-dioxane
• Key physical/chemical properties, and fate and transport processes that are relevant for 1,4-dioxane
• Benefits and limitations of the available analytical methods
• Risk drivers for human health and how ecological risk compares
• How/when/why different treatment technologies are appropriate

Characterization and remediation of contaminated groundwater in fractured rock has not been conducted or studied as broadly as groundwater at unconsolidated porous media sites. This unfamiliarity and lack of experience can make fractured rock sites perplexing. This situation is especially true in portions of the U.S. where bedrock aquifers are a primary source of drinking and process water, and demands on water are increasing. As a result, remedial activities often default to containment of contaminant plumes, point of use treatment and long-term monitoring rather than active reduction of risk. However, this attitude does not incorporate recent advances in the science and technology of fractured rock site characterization and remediation.

The basis for this training course is the ITRC guidance: Characterization and Remediation of Fractured Rock. The purpose of this guidance is to dispel the belief that fractured rock sites are too complex to characterize and remediate. The physical, chemical and contaminant transport concepts in fractured rock have similarities to unconsolidated porous media, yet there are important differences. These differences are the focus of this guidance.

By participating in this training class, you should learn to:

• Use ITRC's Fractured Rock Document to guide your decision making so you can:
  • Develop quality Conceptual Site Models (CSMs) for fractured rock sites
  
  
  • Set realistic remedial objectives
  
  
  • Select the best remedial options
  
  
  • Monitor remedial progress and assess results
• Value an interdisciplinary site team approach to bring collective expertise to improve decision making and to have confidence when going beyond containment and monitoring - - to actually remediating fractured rock sites.

Case studies of successful fractured rock remediation are presented to provide examples of how fractured rock sites can be evaluated and available tools applied to characterization and remediation.

Training participants are encouraged to view the associated ITRC guidance, Characterization and Remediation of Fractured Rock prior to attending the class.

Connecting the Science to Managing LNAPL Sites - 3-Part Series

The newly updated LNAPLs (Light Non-Aqueous Phase Liquids) 3-part training course series is based on the ITRC guidance: LNAPL Site Management: LCSM Evolution, Decision Process, and Remedial Technologies (LNAPL-3, 2018) and focuses on connecting the science to managing LNAPL sites and helping you:

• Build upon your Understanding of LNAPL Behavior in the Subsurface (Part 1)
• Develop your LNAPL Conceptual Site Model and LNAPL Remedial Goals (Part 2)
• Select/Implement LNAPL Technologies (Part 3)

In situ remediation technologies using amendment injections have advanced to mainstream acceptance and offer a competitive advantage over many forms of ex situ treatment of soil and groundwater. Developing a detailed site-specific strategy is absolutely critical to the success of such in situ remedies. These strategies include conducting a thorough site characterization that will allow development of a detailed Conceptual Site Model (CSM) to guide critical analysis of subsurface features and improving remediation effectiveness. In the interest of developing expedited solutions, many past in situ remediation projects have been executed based on an incomplete understanding of the hydrogeology, geology, and contaminant distribution and mass. Some of these sites have undergone multiple rounds of in situ injections but have not advanced to closure. Better strategies and minimum design standards are required to decrease uncertainty and improve remedy effectiveness.

In an effort to overcome these challenges and improve the effectiveness of in situ remediation using injected amendments, ITRC developed the guidance: Optimizing Injection Strategies and In Situ Remediation Performance (OIS-ISRP-1). The guidance and this associated training course identify challenges that may impede or limit remedy effectiveness and discuss the potential optimization strategies, and specific actions that can be pursued, to improve the performance of in situ remediation by:

• Refining and evaluating remedial design site characterization data;
  
• Selecting the correct amendment;
  
• Choosing delivery methods for site-specific conditions;
  
• Creating design specifications;
  
• Conducting performance evaluations, and
  
• Optimizing underperforming in situ remedies.

Extreme weather events and wildfires are increasing and impacting hazardous waste sites. The primary goal of cleanups, which is protecting human health and the environment, is undermined. Confronted with these risks, environmental professionals should assess, and design remedies that are sustainable and resilient. Sustainable resilient remediation (SRR) is an optimized solution to cleaning up and reusing a hazardous waste site that limits negative environmental impacts, maximizes social and economic benefits, and creates resilience against increasing threats.

The objective of the ITRC Sustainable Resilient Remediation (SRR-1) is to provide resources and tools for regulators, stakeholders, consultants, and responsible parties to help integrate sustainable and resilient practices into remediation projects. This guidance updates the Interstate Technology and Regulatory Council's (ITRC) Technical and Regulatory Guidance: Green and Sustainable Remediation: A Practical Framework (ITRC 2011a) and includes a strong resilience component to address the increasing threat of extreme weather events and wildfires. Recommendations for careful and continuous consideration of the social and economic costs and benefits of a cleanup project are included.

Training Objectives

• Educate participants about available SRR resources and tools
• Impart evolution from Green and Sustainable Remediation (GSR) to SRR
• Provide guidance on practical application and implementation of SRR
• Provide participants with information necessary to navigate the SRR guidance and tools

Training Goals

• Provide information and resources for the social and economic dimensions of sustainability, including state-of-the-art social and economic evaluation tools
• Provide a framework illustrating how and why sustainability and resilience should be integrated throughout the remedial project life cycle
• Offer checklists of key sustainable best management practices to address resilience based on specific vulnerabilities at a site, as well as resources for additional information
• Present interactive maps with links to available state and federal resources to quickly find examples and best practices from your state or other states and federal agencies
• Reference case studies illustrating the application of SRR considerations

After the SRR Training, a user will have the tools necessary to understand what SRR is and how it can be used to achieve a sustainable and resilient remediation outcome. This can be accomplished by remediation practitioners applying the principles and practices to a contaminated site and by providing SRR resources to help regulators and stakeholders in the development and review of project documents or submittals.

The intended users of this guidance and training course are those individuals responsible for managing contaminated sites. Users of this training and the associated documents will develop an understanding of SRR and its importance in achieving sustainability and resilience for site remediation. Principals, best practices, resources, and trainer insights will help users conduct SRR tailored to the needs of the sites under their care.

Recommended Reading: Participants are strongly encouraged to review the ITRC Sustainable Resilient Remediation, (SRR-1) document prior to participating in the training class. Also, because SRR-1 is an expansion and update of the concepts developed in Green and Sustainable Remediation: A Practical Framework, GSR-2, review of this document is recommended but is not a prerequisite.

Remediation at petroleum release sites is often infeasible for technical or cost reasons. Many of these sites could be depleted in typical indicator compounds, such as BTEXN, but still heavily contaminated in terms of Total Petroleum Hydrocarbons (TPH). The traditional indicator compound approach for managing petroleum contaminants may not fully identify short- and long-term potential environmental concerns, can create delays in project schedules and cost overages for sub-surface utility work or redevelopment. It is important to consider a comprehensive cumulative risk-based approach to more effectively incorporate TPH data in addition to traditional BTEXN data for cleanup and long-term management decisions.

The basis for this training course is the ITRC guidance: TPH Risk Evaluation at Petroleum-Contaminated Sites (TPHRisk-1, 2018). The guidance builds on long-standing and current research and experience, and presents the current science for evaluating TPH risk at petroleum-contaminated sites. The methods and procedures to evaluate human and ecological risk and establish cleanup requirements in the various media at petroleum release sites will assist decision makers in developing and implementing a technically defensible approach. In addition, the guidance provides information and supplemental references to assist practitioners and project managers in the assessment of fate, transport, exposure, and toxicity of TPH. The guidance users will also gain information that may be used in conjunction with classic tiered approaches for risk-based decision making (ASTM 2015b, ITRC Risk 3 2015), including modifications in the assessment and remedial-decision and regulatory framework for TPH impacts through direct comparison to screening levels, site-specific modification of screening levels, and complete site-specific risk assessment for sources, receptors, and pathways, where appropriate.

The target audience for this guidance and training course is:

• Regulators and Program Managers interested in knowing how site management decisions can influence the TPH risk evaluation process.
  
• Risk assessors new to TPH data or those who want additional knowledge and training in the current methods and common practices for collecting and using TPH data in assessments to more accurately determine human health and/or ecological risks at petroleum-contaminated sites.
  
• Stakeholders who are either engaged in redevelopment at former petroleum release sites or folks who are involved in community engagement and revitalization activities.

• Recognize the ITRC document as a go-to resource for evaluating TPH risk at petroleum-contaminated sites
  
• Recognize how TPH -impacted media interacts with the environment and changes over time
  
• Select appropriate analytic method(s) to match site objectives
  
• Apply the decision framework to determine when a site-specific target level may be more appropriate than a generic screening level for TPH

The Vapor Intrusion Mitigation training is a series of eight (8) modules, presented over two sessions.

The Vapor Intrusion Mitigation training series provides an overview of vapor intrusion mitigation and presenting information from the ITRC fact sheets, technology information sheets, and checklists (VIM-1, 2021):

Session 1:

• Introduction & Overview of Vapor Intrusion Mitigation Training Team
• Conceptual Site Models for Vapor Intrusion Mitigation
• Public Outreach 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, and Exit Strategies

When certain contaminants or hazardous substances are released into the soil or groundwater, they may volatilize into soil gas. Vapor intrusion (VI) occurs when these vapors migrate up into overlying buildings and contaminate indoor air. ITRC has previously released guidance documents focused on VI, including the "Vapor Intrusion Pathway: A Practical Guidance" (VI-1, 2007) and "Petroleum Vapor Intrusion: Fundamentals of Screening, Investigation, and Management" (PVI, 2014). However, ITRC has received multiple requests for additional details and training on mitigation strategies for addressing this exposure pathway.

The ITRC Vapor Intrusion Mitigation Team (VIMT) created ten fact sheets, 16 technology information sheets, and 4 checklists with the goal of assisting regulators during review of vapor intrusion mitigation systems, and helping contractors understand the essential elements of planning, design, implementation, and operation, maintenance and monitoring (OM&M) of mitigation systems.

• How to locate and utilize the VIM-1 fact sheets, technology information sheets, and checklists
• The importance of a VI mitigation conceptual site model
• How public outreach for VI mitigation differs from other environmental matters
• When to implement rapid response for vapor intrusion 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 discontinuing a mitigation system