Webinars
Welcome to the thermal remediation educational webinar portal! We invite you to join us for live presentations by our team of in-house experts. This page provides you with access to an immersive learning experience, where you can discover the latest developments, best practices, and innovative solutions in the field of thermal remediation. From exploring case studies to discussing emerging technologies, our webinar series is designed to empower you with the expertise needed to make informed decisions and drive positive change.
Upcoming Webinars
Getting Started with Thermal Remediation
January 29, 2025 | 10:00 AM Pacific / 1:00 PM Eastern
In this first webinar of our series titled “The Nuts and Bolts of Thermal Remediation,” we will introduce the fundamentals of thermal remediation, covering the key contaminant removal and destruction mechanisms as well as the primary thermal technologies available. We will explore the benefits and limitations of each technology in relation to site geology and hydrogeology, addressing conditions like above and below the water table, high permeability / high groundwater flow settings, fractured bedrock, and complex sites with mixed permeability layers.
We will also cover the three basic thermal treatment approaches: low (35 to 90°C), moderate (100°C), and high temperature (greater than 100°C), discussing their sweet spots, what contaminants can be treated with each, and why you would choose one over the others. The session will wrap up with a case study demonstrating how multiple thermal technologies were successfully combined to effectively treat a CVOC DNAPL site with both low and high groundwater flow conditions.
Using Conceptual Site Models to Guide Thermal Technology Choice
February 26, 2025 | 10:00 AM Pacific / 1:00 PM Eastern
In this second webinar of our series, “The Nuts and Bolts of Thermal Remediation,” we will take a deep dive into evaluating a site’s Conceptual Site Model (CSM) and selecting the optimal technologies and approach to achieve remedial objectives.
We will review the primary thermal technologies, detailing how each works, and discussing their advantages and limitations across a range of geologic and hydrogeologic conditions, including clay, silts, sands, gravels, bedrock, and varying groundwater flow.
Next, we will outline the key data from a site's CSM that determines technology selection, including:
- COC(s) chemical and physical properties
- Remediation goals
- Depth and volume of contamination
- Geology and groundwater flow
- Presence of underground structures or utilities
- Geotechnical considerations
Finally, we will explore how high resolution site characterization (HRSC) and precise source zone delineation can streamline your project, reduce costs, and ensure successful cleanup outcomes.
Thermal Modeling, Wellfield Design, and Monitoring
March 26, 2025 | 10:00 AM Pacific / 1:00 PM Eastern
In the third session of our webinar series titled “The Nuts and Bolts of Thermal Remediation,” we will review the details of the design of thermal remediation systems, following a thorough review of the Conceptual Site Model (CSM), and the selection of the appropriate technologies and approaches.
Thermal remediation expert, Steffen Griepke will guide us through designing the heating, extraction, and monitoring components of the system. He will also discuss the role of numerical modeling in ensuring effective heating across the treatment zone at all depths and locations as well as in predicting the operational timelines, utility requirements, and equipment sizing.
Some key insights from numerical modeling include estimating electrical power load, electricity consumption, vapor and liquid contaminant loading to the treatment equipment, liquid treatment and discharge rates, and vapor and liquid cooling loads.
We will cover the design of the wellfield components, including the thermal wells (TCH, ERH, SEE), extraction wells, and temperature and pressure monitoring points. This session will also specify which parameters to monitor and at what frequency. Lastly, we will discuss the importance of evaluating whether an insulated vapor cover is needed over the treatment area to ensure effective heating and successful remediation.
Selection and Design of Vapor and Liquid Treatment Systems
April 23, 2025 | 10:00 AM Pacific / 1:00 PM Eastern
Vapor and liquid extraction and treatment systems are essential components of in situ thermal remediation (ISTR). These maintain pneumatic and hydraulic control during all phases of heating to ensure that the contaminants of concern (COCs) are effectively captured and removed from the treatment zone and unwanted mobilization and spreading are prevented.
Once recovered, the COCs must be removed from the vapor and liquid streams for proper disposal. In this fourth webinar in our series titled “The Nuts and Bolts of Thermal Remediation,” we will look at how vapor and liquid extraction and treatment systems are designed.
Presenter Steffen Griepke will draw on his experience to cover:
- Choosing the right treatment technologies for specific COCs and mass levels.
- Special considerations for treating PFAS and 1,4-dioxane.
- The fundamental components of ISTR treatment systems.
- Selecting appropriate materials for vapor manifolds and treatment equipment.
- The role of the mass and energy balance in sizing equipment and in managing the cooling and heating loads.
- Effective strategies for handling non-aqueous phase liquid (NAPL) recovered from the treatment zone or condensed out in the vapor manifold and equipment.
Key Steps for Installation of Thermal Remediation Systems
May 28, 2025 | 10:00 AM Pacific / 1:00 PM Eastern
As the design of your thermal remediation project nears completion, it is time to start planning for system installation and construction. In the 5th webinar of our six-part series, “The Nuts and Bolts of Thermal Remediation,” we will cover the key steps to ensure a successful wellfield installation and system construction program.
We will discuss what’s needed to prepare your site for safe and efficient drilling and well installation, including:
- Utility locating
- Clearing and abandonment
- Rig access and sequence planning
- Managing overhead utilities
- Drilling inside buildings
- Investigation Derived Waste (IDW) screening and handling
- Oversight and logging
- Opportunities to collect contaminant data and refine the site CSM during installation
Additionally, we will cover the essential aspects of installing the extraction and treatment systems, along with the power supply equipment. This includes materials and equipment off-loading and staging, determining equipment size and location, placing the power drop, primary transformer, and power distribution and control panels; and managing any site access challenges.
Monitoring and Evaluating Thermal Remediation Operations
June 25, 2025 | 10:00 AM Pacific / 1:00 PM Eastern
Join us for the final session of our 6-part series, "The Nuts and Bolts of Thermal Remediation." In this session, we will cover the critical components for achieving successful thermal remediation operations:
- Startup Procedures: Best practices for initiating your thermal remediation project.
- Operational Tasks: Key insights into monitoring, controlling, and troubleshooting heating, extraction, and treatment systems.
- Data-Driven Decisions: How to leverage data collection, processing, and visualization to optimize system performance.
- Defining Success: The importance of setting clear project objectives and using KPIs to measure success.
Don't miss this opportunity to elevate your thermal remediation expertise and wrap up our comprehensive series with practical strategies and knowledge!
Past Webinars
ERH vs. TCH: How to Choose Your Thermal Remediation Technology (and Why)?
“How do I choose between ERH and TCH?”
It’s one of the most commonly asked questions when considering thermal remediation, and in this webinar one of the industry’s leading experts will answer it. Join TerraTherm, a Cascade Company’s Vice President John LaChance as he introduces the basic operational theory and concepts for both technologies. He’ll discuss their application to a set of typical site conditions (e.g., low and high permeability zones in unconsolidated and bedrock formations) and contaminants (e.g., CVOCs), and highlight typical design approaches, assumptions, and the pros and cons of each.
John will share real-life examples of full-scale projects involving electric resistance heating (ERH) and thermal conductive heating (TCH), including detailed breakdowns and comparisons of costs. He’ll also touch on ETDSPTM, a form of ERH that employs active injection and extraction of water. If you have burning questions about how ERH and TCH stack up, this is your chance to get them answered.
Thermal Remediation of High Mass Hydrocarbon Sites: When NAPL Capture Governs the Mass Recovery
On sites with contaminant masses counted in the hundred-thousand to million pound range, it’s imperative you choose the right technology for your remedy.
Thermal Technologies are widely used to target high mass contaminated sites where non-aqueous phase liquids (NAPLs) are known to be present. While the geology and hydrogeology of a site typically is a driving factor for technology selection, the mass distribution, chemical composition and thermal behavior for the site contaminants are often the key drivers in determining in which phase the mass is mobilized, and thus the extraction strategy. For VOCs, mobilization in the vapor phase typically fully governs the mass removal. However, for more complex mixtures of high boiling point hydrocarbons, that may not be the case.
In this webinar, Technology Director Steffen Griepke explains what to consider when selecting and designing your thermal remedy for optimized mass removal. He shares best practices and examples drawn from the two decades he worked in thermal remediation.
Real-Time Solutions to Unexpected Challenges Encountered During Thermal Remedy Implementation
An in situ thermal remediation (ISTR) design may look good on paper, but how will it perform in the field?
Thermal Conduction Heating (TCH), Electrical Resistance Heating (ERH) and Steam Enhanced Extraction (SEE) are widely used thermal technologies capable of effectively remediating a variety of chemicals in various varying subsurface settings, yet sometimes operations do not perform as planned. Due to the aggressive nature of thermal remediation in parallel with pro-active monitoring, operational challenges must be addressed immediately, typically within days rather than weeks. Lessons learned from more than 100 full-scale TCH, ERH and SEE projects will be discussed, focusing on common operational challenges that arise during full-scale thermal projects.
Thermal Remedy of Fractured Crystalline Rock
Investigating and remediating fractured rock can be a lot more complex than treating a porous media like sand or clay. This webinar will present information and data from projects where thermal remediation was successfully used to clean up sedimentary, metamorphic, and igneous bedrock. The removal mechanisms as well as challenges for using thermal remediation technologies in fractured rock will also be reviewed, along with technology applicability and costs.
Thermal Rediation for Treatment of PFAS Source Areas
Per- and polyfluorinated substances (PFAS) are known as forever chemicals because they are persistent in the environment and difficult to remove. Tackling these contaminants is feasible with the right technology. Thermal conductive heating (TCH) is an effective remediation solution for PFAS and other recalcitrant compounds. Recent laboratory studies conducted by TerraTherm partner Krüger have shown better than 99.99% removal of PFAS contaminants when simulating the TCH efficiency.
You know there’s more to project success than technology alone. Experience matters. TerraTherm’s Technology Director with guest speaker Søren Eriksen, Chemical Engineer from Krüger. They addresses the literature background as it relates to thermal removal of PFAS, describes the conducted lab testing and results. They also touch on the fate of the thermally treated PFAS compounds in the process, and presents how a field application will be implemented.
Mass Removal: Why it’s Important and How to Calculate it
Mass removal is one of the major focal points for all parties involved in thermal projects, but it is often not well-defined or understood. The basis for calculating mass removal seems simple—flow x concentration—but if we take a deeper look into the methodology behind analyzing these parameters, we find it can be far more complicated than most clients and regulators are prepared for.
Project Engineer and Senior Chemist Alyson Fortune discusses how to ensure a solid understanding of the mass present in the subsurface prior to in situ thermal remediation (ISTR), walks us through an accurate mass removal calculation during operations, and cover the various field and laboratory analytical methods that are the basis of these calculations.
In Situ Thermal Remediation Modeling: The Basis of Design
For thermal projects, it all starts with the subsurface design. A numerical water and energy balance code can provide operational parameters such as energy input and extraction rates, operations duration and estimated utility usage that serve as the foundation upon which the rest of the in situ thermal remediation (ISTR) design is built. The numerical model simulates the addition, removal and loss of energy using a multi-layered box model approach that is driven by the conceptual site model (CSM) provided by the project consultant.
Technical Specialist, Amber Bonarrigo explores how to convert a CSM to input parameters for the numerical modeling effort, the mechanics and theory behind the numerical model and the key model outputs that fuel the overall ISTR design.
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