Pittsburgh, PA
Environmental Alert
(by Matt Wood and Jean Mosites)
On April 17, 2024, the U.S. Environmental Protection Agency (EPA) released a pre-publication version of its long-anticipated final rule designating perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS), and their salts and structural isomers, as “hazardous substances” under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). The final rule will be effective 60 days after publication in the Federal Register. PFOA and PFOS are the two most prominent and studied compounds in a “family” of per- and polyfluoroalkyl substances (PFAS) consisting of thousands of manmade chemicals. PFAS have been widely used for decades in various applications, including manufacturing water-, stain-, and heat-resistant consumer products, e.g., waterproof clothing and food packaging, and as ingredients in aqueous film forming foams (AFFF) used to extinguish certain kinds of chemical fires. Research indicates that exposure to PFAS, which are prevalent and persistent in the environment, may cause various health-related impacts.
EPA’s designation of PFOA and PFOS as CERCLA hazardous substances is unprecedented and not uncontroversial because it is the first time the agency has made such designations using its authority under CERCLA Section 102, 42 U.S.C. § 9602. Until now, CERCLA has always defined hazardous substances by reference to other statutes (e.g., the Clean Water Act and the Resource Conservation and Recovery Act). To reach its conclusion that the designations were warranted, EPA says it evaluated available scientific and technical information about PFOA and PFOS to determine whether they “may present a substantial danger to public health welfare or the environment” as contemplated by CERCLA section 102(a). EPA also conducted a “totality of the circumstances” analysis considering multiple factors, including benefits versus costs. …