We’re proud to share a new publication in “Water Research”: “Characteristics of aqueous film forming foam (AFFF) sites impacted with per- and polyfluoroalkyl substances (PFAS): A 37-site study.”

Co-authored by Poonam Kulkarni, PE, Abigail Cartwright, PE, David T. Adamson, PhD, PE, John Cook, EIT, and Charles J. Newell, PhD, PE, BCEE of GSI, along with Nicolette E. Andrzejczyk and Arun Gavaskar, this article provides insight into PFAS concentration patterns in soil and groundwater at AFFF source zones across the U.S.

Key findings include:
• PFOS and PFOA are the primary contributors in soil, while groundwater concentrations show broader variability
• Maximum PFAS concentrations typically occur in the top one meter of soil
• Median inferred plume lengths for the seven PFAAs range from 220–800 meters
• PFOS, PFOA, and PFHxS contribute 99% of the estimated groundwater exceedance magnitude

Read the full paper about Aqueous Film Forming Foam (AFFF) sites impacted with per- and polyfluoroalkyl substances (PFAS) here: https://www.sciencedirect.com/science/article/abs/pii/S0043135425010310

We’re proud to share a new publication by GSI’s Graham K. Ansell, PhD and Hassan Javed, PhD titled “PFAS Analytical Methods – A Practical Guide,” available in the “Journal of Fluorine Chemistry.”

As PFAS science advances, so does the need for accurate and reliable analytical methods. This article offers a practitioner-focused overview of current PFAS methods, from EPA’s promulgated methods to screening methods, highlighting the strengths, limitations, and key considerations of each.

Whether you’re experienced in PFAS analytical methods or just starting to explore the challenges of PFAS analyses, this guide is a valuable resource for informed decision-making.

Read the full article here: https://www.sciencedirect.com/science/article/abs/pii/S0022113925000569

Just published! “PFAS Monitored Retention: A Framework for Managing PFAS-Contaminated Groundwater Sites” is now available in “Groundwater Monitoring & Remediation.” Co-authored by GSI’s David T. Adamson, PhD, PE, Charles J. Newell, PhD, PE, and Poonam Kulkarni, PE, alongside collaborator Hans Stroo, the article introduces PFAS Monitored Retention (PMR) as a scientifically sound, cost-conscious approach to managing PFAS at groundwater sites.

The framework builds on the principles of monitored natural attenuation (MNA), expanding the toolbox for site managers by emphasizing retention processes like sorption, matrix diffusion, and precursor retention, particularly when immediate risk to receptors is low.

Read the full open-access article here: https://ngwa.onlinelibrary.wiley.com/doi/10.1111/gwmr.70001