RALEIGH, NC -- Regulators face a number of challenges assessing PFAS risks from air emissions due to a variety of factors, an atmospheric chemistry scientist said at a recent PFAS conference, including EPA placing a higher priority on other media, few states taking consistent approaches to address emissions, and a lack of sampling methods. Without established standards from the federal government or consistent state approaches, “there are challenges to trying to assess risks associated with exposure to atmospheric air emissions,”...