7.1 PFAS Methodologies for Wastewater and Solid Waste Professionals and Review of PFAS in Air: What Are the Concentrations?

The PFAS Strategic Roadmap outlines the EPA’s core objectives to research, restrict, and remediate PFAS. The Strategic Roadmap contains a section that specifically speaks to biosolids. This section states that the EPA will be finalizing its risk assessment for PFOA and PFOS in biosolids by winter 2024. This risk assessment will impact wastewater treatment plants as well as solid waste facilities such as municipal landfills and beyond. It is of the upmost importance for impacted facilities to determine the level of PFAS in their biosolid and sludge. This presentation will be a deep dive into the analytical methodologies available to determine PFAS levels. We will cover both speciated PFAS methods such as EPA 1633 and Total Oxidizable Precursor Assay (TOPS) as we as non-speciated organic fluorine methods (TOF, AOF, EOF, TF).Per and polyfluoroalkyl substances (PFAS) in air have recently received more research focus in the environmental field leading to many new publications. As more data becomes available it can be difficult to evaluate based on the different sampling and analytical methods, including different analyte lists. This review will cover studies that have evaluated PFAS in indoor and outdoor air with a focus on PFAS compounds identified in air for each of the sampling and analytical methods.