What You Need to Know About Regulatory Surface Water Screening Levels for PFOA and PFOS
Brad Tompa, P.G., Environmental Consultant, Martian Environmental Services; USACE Geochemist, Hazardous Toxic Radioactive Water Section
Per- and polyfluoroalkyl substances (PFAS), including perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA), have garnered a lot of attention in the engineering and scientific community, municipal utilities, local communities, and state and federal authorities. Increasingly, studies are showing their ubiquitous occurrence in the environment as well as their potentially negative effects on human and aquatic health. PFAS are highly persistent in the environment and difficult to remediate due to the strength of their carbon-fluorine bonds. The Florida Department of Environmental Protection (FDEP) has proposed, though research prepared by the University of Florida, surface water standards for PFAS. We will summarize the development of the FDEP proposed surface water standards and discuss the implications for the regulated community. This presentation will provide a brief review of PFAS, environmental fate and transport, pathways of exposure, and discuss how these parameters impact surface water. Since alternative water sources such as managed aquifer recharge systems using surface water will require suitable pre-treatment or post-treatment technologies, we will summarize the state of knowledge regarding the treatment for PFAS and discuss the technologies that the City of Stuart has successfully implemented to remove PFAS from impacted drinking water.
Mr. Tompa is a registered Professional Geologist with 30 years of experience as an environmental consultant. He is the owner of Martian Environmental Services and is a Geologist/Geochemist with the U.S. Army Corps of Engineers Hazardous Toxic and Radioactive Waste Section in the Jacksonville District. Mr. Tompa has provided expert witness services for water rights, hazardous waste, and groundwater contamination litigation. He is the Technical Manager of multiple PFAS investigations for assessment and remediation.