PFAS & Biosolids: Sources, Occurrence, Transport, and Treatment Training

This ITRC training will provide information on the current understanding of PFAS and biosolids, focusing on land application. It builds on the earlier topics covered in the PFAS 101 training.

This training will provide information on potential sources of PFAS in biosolids, the implications of PFAS associated with land-applied biosolids, including leaching and associated risks, and a conceptual site model. It will also cover the nature and extent of PFAS, field and laboratory considerations when assessing land application sites, factors controlling PFAS mobility, PFAS treatment options for biosolids, and PFAS uptake by plants and animals in these settings, along with approaches to modeling that uptake.

Resources and further details for the topics included in this training are available in the ITRC PFAS-1 guidance document, specifically in Sections 1.7, 2, 4, 5, 8, 10, 12, and 17.3, as well as in the Regulatory Programs Table.
Key topics will include:

• Understanding the Sources and Types of PFAS
• Considerations for Evaluating Nature & Extent of PFAS Contamination at Land Application Sites
• Evaluating Fate and Transport of PFAS in the Environment from Land-Applied Biosolids
• Evaluating and Modeling Risk from PFAS in Agricultural Settings
• Evaluating Treatment and Management Options for PFAS in Biosolids

Chris Evans, ME DEP
Chris Evans is a Senior Environmental Hydrogeologist at the Maine Department of Environmental Protection, where he has over 20 years' experience providing technical review and oversight of hazardous waste investigations and remediation projects, primarily under the DoD/CERCLA and RCRA programs. Since 2016 he has served as a primary technical lead for PFAS Investigations at Maine DEP. Chris has a BS in geology from Tufts and an MS in Geological Science from the University of Maine, and prior to the DEP worked in environmental consulting and at environmental laboratories in Maine and Michigan. Chris has been a member of the ITRC PFAS team since its beginning in 2017.

Harrison Roakes, PE, Sanborn Head & Assoc.
Harrison is an environmental engineer with Sanborn Head. He has broad experience in soil and groundwater investigations, and he presents and publishes regularly on statistical analysis of environmental data and subsurface contaminant transport and fate. He is experienced with PFAS investigations and has been involved with PFAS characterization and data analysis at over 25 PFAS-impacted sites, including state-wide background soil studies in Vermont and Maine and multiple projects evaluating PFAS leaching from soil. He holds a B.S. and M.S. in Environmental Engineering from the University of New Hampshire, and he is a registered Professional Engineer in several states.

Jeff Wenzel, Missouri Department of Health & Senior Services
Jeff Wenzel has worked for the Missouri Department of Health and Senior Services for 24 years where he has served in a variety of roles including laboratory scientist, environmental specialist, epidemiologist, and bureau chief. For the last 10 years, Jeff has been a member of the Interstate Technology & Regulatory Council’s Per- and Polyfluoroalkyl Substances (PFAS) Team, and since 2024, was chosen to be one of three co-leads for the team.

Anthony Drouin, Weston Solutions, Inc.
Anthony Drouin is a seasoned Senior Project Manager with over 15 years of experience in the Clean Water Industry, specializing in management and regulatory affairs related to biosolids. His career has centered on sustainable management, permitting, and the beneficial use of wastewater residuals, including biosolids, short paper fiber, and water treatment residuals throughout New England. As the Biosolids Administrator for the New Hampshire Department of Environmental Services (NHDES), Anthony played a pivotal role in advancing regulatory programs and sustainability initiatives. He dedicated significant effort to investigating PFAS impacts on wastewater and biosolids management, helping shape policies and best practices to address emerging contaminants.

Lisa McIntosh, Terraphase
Lisa is a Principal Toxicologist at Terraphase Engineering and brings over 25 years of experience in environmental consulting, specializing in human health and ecological risk assessment. Lisa combines her expertise in data analysis, risk assessment, environmental sampling, conceptual site model development, and ecological restoration to manage contaminated sites from initial assessment through cleanup. Lisa’s technical skills are complemented by her experience as an effective public communicator for various stakeholders and as an educator for professional organizations. She is actively engaged in scientific and regulatory communities through her participation, education, and leadership in professional organizations and technical workgroups. She has been an active member of the ITRC PFAS team since its inception and contributed to the development of the PFAS Technical Regulatory Guidance Document and other training materials in the subjects of PFAS toxicology, risk assessment, and risk communication, and has been a trainer and facilitator at various webinars and in-person workshops.

Tamzen Macbeth, PhD, PE, BCEE, CDM Smith
Tamzen Macbeth is an internationally recognized remediation expert specializing in the development, demonstration, and implementation of innovative, cost-effective technologies for contaminated soil, sediment, and groundwater. With experience connecting scientific and engineering R&D with the design and optimization of cost-effective cleanup programs, Tamzen has helped advance countless technologies within her field. She has worked on over 100 government, private and international contaminated sites at the laboratory-scale, pilot-scale, and full-scale levels. In addition to her work at CDM Smith, Tamzen has impressively published more than 100 technical papers, training manuals and guidance documents on remediation topics, as well as presented at seminars and international conferences to advance remediation technologies.

Edward Watson, North Carolina Department of Environmental Quality
Ed Watson works for the North Carolina Department of Environmental Quality (NCDEQ). ED started in the NCDEQ Division of Water Resources (DWR) in 2015 and has worked in biosolids and non-discharge 503 programs since 2015. He participated in the DWR project for PFAS studies in NC with NCDEQ DWR, which was recently released: PFAS in Wastewater and Biosolids. Prior to this, he worked in environmental geology as a consultant in Florida. He has a B.S. in Geology from Florida Atlantic University, where he also worked as a Field Geologist, Aggregate Materials and Heavy Mineral Sands Mining in Florida and Georgia.

Nathan Hagelin, WSP
Nathan Hagelin is Senior Vice President and the Director of the Office of Technical Practice for WSP in the US. He is a remediation technology leader in WSP’s Emerging Contaminants Practice Area Network with a focus on PFAS groundwater treatment. He is a Licensed Geologist, Licensed Environmental Professional, and Board-Certified Environmental Scientist working for 35 years on the remediation of contaminated industrial properties and military installations. He has prior experience as a Hydrologist with the U.S. Geological Survey Water Resource Division.

Andrew Safulko, PE, Brown & Caldwell
Andrew Safulko is a Senior Environmental Engineer at Brown and Caldwell. Andrew received a BS degree in Environmental Engineering from the University of Colorado at Boulder and a MS degree in Environmental Engineering from the Colorado School of Mines. Andrew supports private and municipal clients in developing tailored PFAS solutions, including site characterization, source identification investigations, treatment, and forensic evaluations. Andrew co-led the Interstate Technology & Regulatory Council (ITRC) PFAS Treatment subgroup.

Louise Roy, LG, Maine Department of Environmental Protection
Louise Roy is a Senior Environmental Hydrogeologist at the Maine Department of Environmental Protection, where she currently leads the geology unit in the Southern Maine office. Louise has worked on PFAS investigations in Maine since 2019 and helped develop the Department’s statewide program for investigating PFAS impacts at sites spread with biosolids. Louise has a BA in Geoscience from Hamilton College and an MS in Oceanography from the University of New Hampshire. Louise co-led the Interstate Technology & Regulatory Council (ITRC) PFAS Sampling and Analysis subgroup.

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ITRC Training Program (itrc@itrcweb.org)

• These materials will be available by Thursday, February 26, 2026

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• These materials will be available by Thursday, February 26, 2026

Additional Resources:

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The feedback form for this webinar will be available starting on Thursday, February 26, 2026.

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Rehabilitation Act Notice for Reasonable Accommodation

It is EPA's policy to make reasonable accommodation to persons with disabilities wishing to participate in the agency's programs and activities, pursuant to the Rehabilitation Act of 1973, 29 U.S.C. 791. Any request for accommodation should be made to ITRC Training Program at 202-266-4932 or itrc@itrcweb.org, preferably one week or more in advance of the webinar, so that EPA will have sufficient time to process the request. EPA would welcome specific recommendations from requestors specifying the nature or type of accommodation needed. EPA welcomes specific recommendations from requestors specifying the nature or type of accommodation needed. Please note that CLU-IN provides both alternate phone call-in options and closed captioning for all webinars, and requests for these specific accommodations are not necessary.

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