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REGENESIS Technical Perspectives Series Part 1 – PlumeStop® Colloidal Activated Carbon and Modelling
REGENESIS invites you to a limited educational webinar series, REGENESIS Technical Perspectives, presented by Dr. Jeremy Birnstingl, a leading environmental expert, on the application of advanced modelling for in situ groundwater treatment using colloidal activated carbon.
This ground-breaking three-part series provides insights and examples into the power and utility of modelling to assist throughout a project, from conceptional and formal design stages to performance data interpretation, management and optimization.
The series has been developed specifically for environmental professionals focused on optimizing and better understanding best practices when developing designs to maximize the effectiveness and longevity of a remedial solution that incorporates colloidal activated carbon technology.
Part 1: PlumeStop® Colloidal Activated Carbon and Modelling
Highlights of this module in the series include:
- Why modelling and PlumeStop are a natural match
- How to use any model for simple PlumeStop explorations
- The REGENESIS PlumeForce™ modelling software
- Model-based designs
Complete the form on this page to view the recording of Part 1 in the REGENESIS Technical Perspectives series.
Recording now available
In-Situ Treatment of PFAS at the Air-Water Interface within a Source Zone Using PlumeStop
In this webinar we were pleased to have as a special guest speaker Rick McGregor, President of InSitu Remediation Services Ltd. His presentation discussed the in situ treatment of PFAS at the air-water interface within a source zone using PlumeStop.
Highlights of this free webinar:
- Case studies presented of field sites with six different PFAS contaminants where PlumeStop was injected at the interface between vadose and saturated zones
- 34 of 36 monitoring events show non-detect for all PFAS except PFPeA for 2 years and counting
- Distribution of PlumeStop confirmed with the target treatment areas for all sites
Complete the form on this page to view this free webinar.
Recording Now Available
Modeling PlumeStop Longevity at AFFF-Impacted Military and Airport Sites
In this webinar we were pleased to have as a special guest speaker, globally-recognized PFAS modeling expert and recent lead author of the REMEDIATION Journal article titled Longevity of colloidal activated carbon for in situ PFAS remediation at AFFF-contaminated airport sites, Grant Carey, PhD, President of Porewater Solutions. His presentation discussed modeling PlumeStop® longevity at AFFF-impacted military and airport sites. He was joined by Scott Wilson, President & CEO of REGENESIS, who provided an update on the use of colloidal activated carbon as a sustainable, low-cost method to eliminate PFAS risk and liability.
Highlights of this free webinar:
- Case studies of 17 PFAS field sites showing successful PlumeStop performance results for up to six years and counting
- In-Situ Remediation Model (ISR-MT3DMS) indicates PlumeStop longevity that may occur at a wide range of AFFF-impacted military and airport sites
- Remedial alternatives that may be used in combination with PlumeStop at AFFF-impacted sites will be discussed
There is growing interest in the use of PlumeStop to sequester PFAS in groundwater sorption zones. PlumeStop contains colloidal activated carbon (CAC) particles which are sufficiently small to allow for easy injection into porous media. The performance of PlumeStop at 17 PFAS field sites is summarized, including upgradient concentrations of PFAS, organic co-contaminants, and native organic matter; and the fraction of CAC in soil after injection. These case studies demonstrate that PlumeStop has been used successfully at PFAS field sites with total monitoring periods to-date ranging from 0.3 to six years.
A review of state and federal guidance indicates that the four most frequent PFAS of interest are PFOS, PFOA, PFHxS, and PFNA. A sensitivity analysis using the In-Situ Remediation Model (ISR-MT3DMS) illustrates the magnitude of PlumeStop longevity that may occur at a wide range of AFFF-impacted military and airport sites. A statistical analysis of PFAS concentrations at 96 AFFF-impacted sites and laboratory batch tests supported this modeling study. Various influencing factors were modeled, including plume concentrations, groundwater velocity, the engineered fraction of CAC in soil, and sorption isotherm properties. Remedial alternatives that may be used in combination with PlumeStop at AFFF-impacted sites are discussed.
Complete the form on this page to view this free webinar.
Webinar recording available
Risk and Liability – Part 1: PFAS Mitigation and Managing Liabilities
This webinar is Part 1 in a two-part webinar series featuring special guest speakers Hilary Robinson, PE, Emerging Contaminants Lead and Eric Leitz, Director of Legacy Site Services at RPS Group. Their presentation discussed risk and managing liabilities, taking a look at PFAS contamination.
Part 1: Risk and Liability – PFAS Mitigation and Managing Liabilities
- Selecting practical sampling and analytical methods to assess past and present risks
- Developing achievable and effective response strategies in light of stringent EPA advisories and developing regulations
- How the industrial history and unique chemistry of PFAS affects its presence, behavior, and risks posed at a site
If PFAS are “everywhere,” how can that risk be managed to maintain financial assurance or facilitate a transaction? We will describe our varied experience scaling an investigative response to the problem at hand, from performing diligence on processes and waste streams to sampling, sampling, and more sampling. State and Federal agencies have generally provided only limited guidance, and courts have similarly only weighed in on a limited number of specific cases. Therefore, pragmatic approaches can help to analyze the evolving regulatory and legal environment to understand and manage the potential consequences PFAS may have on transactions, facility operations, and personnel or the public.
Recording now available
PFAS Regulatory State of the Union
In this webinar we were pleased to have special guest speaker Taryn McKnight, PFAS Practice Leader for Eurofins Environment Testing America. Her presentation discussed regulatory actions at both the federal and state level to address PFAS contamination. She was joined by Paul Erickson, PhD, Director of Research & Development at REGENESIS.
Highlights of this free webinar:
- A catalogue of notable and lesser known relevant regulatory actions at both the federal and state level targeting PFAS
- A state of the science with regards to a range of PFAS research topics and scientific developments
- Latest news on toxicology, health studies, analytical method development, and understanding the fate and transport of PFAS
Complete the form on this page to view this free webinar.
Recording now available
Analytical Tools to Promote CVOC and PFAS Plume Stability
In this webinar we are pleased to have special guest speakers WSP’s Matt Burns, VP and Technical Director of the Earth and Environment Practice, and Joe Ricker, Senior Technical Principal. Their presentation will discuss the use of plume analytics, focusing on its potential applicability to MNA of PFAS, and its usefulness in assessing CVOC plume stability. They will be joined by Maureen Dooley, Vice President – Industrial Sector at REGENESIS.
Highlights of this free webinar:
- Potential applicability of plume analytics to MNA of PFAS
- Using analytics to assess plume stability and other plume attributes, with examples from remediation sites
- Use of colloidal activate carbon to eliminate risk of PFAS contamination in groundwater
Complete the form on this page to sign up for this free webinar.
Recording now available
Attaining PFAS Criteria in Groundwater: Predictability, Sensitivity, & Practicability
In this webinar we were pleased to have as a special guest speaker Jeff Hale, Practice Leader – Emerging Contaminants at Woodard and Curran. His presentation discussed attaining PFAS criteria in groundwater. He was joined by Dr. Kristen Thoreson, Vice President of Quality and Process Improvement at REGENESIS, who discussed the latest developments about colloidal activated carbon’s use in the remediation industry as a low-cost method of eliminating PFAS risk.
Highlights of this free webinar:
- Examination of the practicability of attaining PFAS criteria in groundwater and the distance from source at which these regulatory criteria are attained
- Empirical fate & transport modeling using available data sources demonstrates expected distances to attainment of regulatory criteria
- Use of colloidal activate carbon to eliminate risk of PFAS contamination in groundwater
Regulatory jurisdictions are establishing increasingly stringent, health-based criteria for per and polyfluoroalkyl substances (PFAS) in groundwater with the aim of protecting receptors at the point of exposure. The practicability of attaining these criteria in groundwater and the distance from source at which these regulatory criteria are attained without intervention have received little evaluation. Empirical fate & transport modeling using available data sources demonstrates expected distances to attainment, as well as the sensitivity of that attainment distance to various regulatory criteria and guidance values. The statistical distribution of these PFAS data sets also informs the approach and practicability of potential groundwater remedies.
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Is That Your PFAS? Using Forensics to Identify Sources
Date: Tuesday, May 17th, 2022
Time: 11am pacific / 2pm eastern
In this webinar we are pleased to have as a special guest speaker Elizabeth Denly, PFAS Initiative Leader & Chemistry Director at TRC. Her presentation will discuss using forensics to identify sources of PFAS.
Highlights of this free webinar:
- The efficacy and limitations of using PFAS analytes as fingerprints for source identification
- Demonstrating the challenges of source identification due to chemical signatures from samples collected at numerous PFAS source areas
- Use of chemical signatures in combination with fate and transport mechanisms for PFAS source identification
Evaluation of the relative composition of individual PFAS compounds in surface water and groundwater samples can be an effective method to identify the source(s) of PFAS in these media. The list of PFAS compounds that laboratories are able to detect, and the list of analytes required by various regulatory agencies continues to expand. As a result, the number of compounds that can be used to “fingerprint” samples is variable with time and with location. Comparison of chemical fingerprints in samples collected from surface water bodies and groundwater located downstream and downgradient of contaminated sites may appear to be the same simply because of the suite of analytes chosen for fingerprinting. Chemical signatures in combination with fate and transport mechanisms (e.g., commingling, persistence, sorption, dilution) must be considered during source identification. Using literature-based data and data collected by the authors, chemical signatures from samples collected at numerous PFAS source areas demonstrate how identification of sources can be challenging. Attendees will learn about the efficacy and limitations of using PFAS analytes as fingerprints for source identification and delineation.
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PFAS in Class B Firefighting Systems – Prepare Now for Looming PFAS Roadmap Challenges
In this webinar we were pleased to have a special presentation from Ned Witte, Attorney at Godfrey & Kahn, S.C. His presentation discussed PFAS in Class B firefighting systems, and how to prepare for looming PFAS Roadmap challenges.
Highlights of this free webinar:
- Proactive best practices owners of Class B systems should employ now
- Regulatory developments that will have dramatic effects on owners and operators of PFAS-containing AFFF Class B firefighting systems
- Discussion of Class B systems and the relationship of National Fire Prevention insurance standards
- The propensity of PFAS releases from Class B systems
- The application of coming federal PFAS regulations
Momentum is gaining for comprehensive federal regulation of PFAS, as identified in the October 2021 U.S.EPA PFAS Strategic Roadmap, including identification of certain PFAS as CERCLA “hazardous substances” and development of enforceable maximum contaminant levels, or MCLs, for PFAS. While these regulatory developments will impact all businesses and properties that PFAS has touched, the federal rules – and existing and developing state laws – will have dramatic effects on owners and operators of PFAS-containing AFFF Class B Firefighting Systems.
Recording now available
PFAS Remediation at Fairbanks International Airport: Fate and Transport of PFAS and the Use of Colloidal Activated Carbon
In this webinar we were pleased to have as a special guest speaker Kristen Freiburger, Associate at Shannon & Wilson. Her presentation discussed PFAS remediation at Fairbanks International Airport, including a discussion of fate and transport of PFAS and the use of PlumeStop colloidal activated carbon.
Highlights of this free webinar:
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- The presumed source of PFAS in groundwater in many Alaskan communities is the use of AFFF by airport rescue and firefighting at Part 139 Airports operated by Alaska DOT&PF
- Fate and transport of PFAS as it relates to projects at Gustavus and Fairbanks Airports
- Use of PlumeStop to address PFAS contamination at the Fairbanks International Airport
PFAS are highly soluble in water and have a very strong carbon-fluorine backbone making them resistant to traditional remediation technologies and natural attenuation. PFAS that enter groundwater are known to be persistent and travel long distances. Fate and transport of PFAS in groundwater depends on the environment which they were released and the physical properties of the PFAS being examined (e.g., carbon chain lengths, linear/branched isomers, functional groups, and degree of fluorination). The presumed source of PFAS in groundwater in many Alaskan communities is the use of AFFF by airport rescue and firefighting at Part 139 Airports operated by Alaska DOT&PF. When AFFF releases occur in areas served by private or public drinking water wells, the well water is susceptible to contamination. Kristen Freiburger will discuss the fate and transport of PFAS as it relates to her PFAS work of the Gustavus and Fairbanks Airports including the use of PlumeStop at the Fairbanks International Airport. This discussion will focus on the challenges of understanding fate and transport of PFAS.
