What You Need to Know About Regulatory Surface Water Screening Levels for PFOA and PFOS
Brad Tompa, P.G., Environmental Consultant, Kimley-Horn
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, county and municipal utilities, local communities, state and federal authorities, and the mainstream media. 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. There is a divergence of thought regarding the risk to human health and the environment. Some agencies have adopted a highly conservative approach to new PFAS regulation and tout evidence of significant health impacts ranging from elevated cholesterol to reproductive harm, developmental delays, and an increased risk of certain cancers. Others have contested the science used to develop the proposed standards citing research that shows no link between cancer and PFAS. This presentation will provide a brief review of PFAS, environmental fate and transport, applicability of forensic analysis, pathways of exposure, and discuss how these parameters impact stormwater. We will summarize the development of the FDEP proposed surface water standards and discuss the implications for the regulated community. Since alternative water sources such as managed aquifer recharge systems using stormwater 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 water.
To be submitted.