What’s New in PFAS Toxicity Since 2016 PFOA/PFOS Health Advisory
Plus Potential Impacts to Federal and State Actions
Over the past two decades, there have been dramatic changes in “guideline” levels for PFOA/PFOS, primarily as a result of science developments in understanding toxicities of these substances. Since the US Environmental Protection Agency (EPA) established final Health Advisory Levels (HALs) for PFOA/PFOS in 2016, numerous states have further developed their own health-based or regulatory values that are distinct from the EPA’s HALs in terms of screening, notification, action, response, maximum contaminant levels, cleanup levels, etc.
This presentation examines the regulatory dynamics of PFAS as Emerging Contaminants through a compare/contrast of regulations nationally that considers new PFAS toxicity data developed since 2016. The following matters have particular focus:
What to expect with federal Maximum Contaminant Level (Goals) having new toxicity values several orders of magnitude lower than those used for the EPA 2016 HAL
Potential development of TCLP levels for PFOA/PFOS as a characteristic hazardous waste
Ramifications of UCMR5 data for 29 PFAS with lower detection limits than UCMR3
Discussion of which PFAS compounds and HALs the US EPA may develop during the EPA's 2021-2024 Commitments to Action
Communication of major challenges for decision making in impacted businesses and industries.
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This presentation was originally presented at The PFAS Forum II, which took place on May 2-4, 2022 at the Renaissance Tampa International Plaza Hotel in Tampa, Florida.
Ziqi (Zeke) He, Ph.D., P.E. is a senior technical consultant at Verdantas with over 20 years of research and consulting experience in the area of fate and transport/transformation of persistent and emerging contaminants in both natural and engineered systems.