February 9, 2022

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Bruce Marvin, John Merrill, and Balaji Seshasayee Coauthored Article on Treatment of PFAS in Groundwater for HydroVisions

Bruce Marvin, P.E., John Merrill (California); and Balaji Seshasayee, P.E. (Illinois) coauthored an article entitled "Treatment of PFAS in Groundwater - An Overview" for publication in the 2021 Winter Issue of HydroVisions.

Additional coauthors were Manmeet Pannu, Orange County Water District and Jim Strandberg, Woodard and Curran.

Bruce Marvin is a Senior Principal Environmental Engineer based in California with more than 30 years of consulting experience focused on civil engineering, soil and groundwater remediation, and facility closure. He specializes in project strategy development, technology selection, engineering process design, and quality assurance procedures. His clients include commercial and governmental entities in the United States, Japan, Canada, and Australia.

John Merrill is a Staff Engineer based in California focused on environmental site assessment and remediation, litigation support, and applied research projects in collaboration with university partners. He also has experience related to emerging contaminants, including per- and polyfluoroalkyl substances (PFAS), 1,4-dioxane, and 1,2,3-tricholorpropane (TCP).

Balaji Seshasayee is a Project Engineer based in Illinois who specializes in groundwater treatment solutions for PFAS and other emerging contaminants, including technology evaluation, treatability testing, and treatment system design. He has experience in analyzing and designing fixed-bed absorbers as well as other unit processes for water treatment.

HydroVisions is the official publication of the Groundwater Resources Association of California.

The Groundwater Resources Association of California is a volunteer organization dedicated to resource management that protects and improves groundwater supply and quality through education and technical leadership.


Per- and polyfluoroalkul substances (PFAS) have garnered significant scientific, regulatory, and public attention due to their recalcitrant, ecological persistence, and widespread occurrence—thus the moniker "forever chemicals." PFAS has been detected in groundwater and in finished drinking water throughout the United States. Six PFAS were included in the Third Unregulated Contaminant Monitoring Rule, which required sampling of finished drinking water from a subset of U.S. public water systems between 2013 and 2015. Of the samples collected from water systems with a groundwater source, 1.2% contained perfluorooctanoic acid (PFOA) at or above the minimum reporting level of 20 nanograms per liter (ng/L).

More Information

About the article: Treatment of PFAS in Groundwater - An Overview
About HydroVisions: https://www.grac.org/hydrovisions/
For consultation regarding PFAS in groundwater, contact Bruce Marvin at This email address is being protected from spambots. You need JavaScript enabled to view it.
Learn more about Bruce: Bruce Marvin | Geosyntec Profile
Learn more about John: John Merrill | LinkedIn
Learn more about Balaji: Balaji Seshasayee | LinkedIn