From cookware to dental floss to stain-resistant fabrics, PFAS, or per- and polyfluoroalkyl substances, pervade modern life. PFAS are a family of thousands of synthetic chemicals that have a variety of unique qualities that make them useful in industrial and consumer product applications. Unfortunately, there is a growing scientific recognition that many PFAS come with a cost to public health and the environment. While federal and state action is just beginning for PFAS and the regulatory landscape is changing quickly, the toxicity of many PFAS has been well-established.

The Oak Ridge Reservation is one of the largest U.S. Department of Energy (DOE) facilities in the country, with areas that are highly contaminated by chemicals, metals, and radionuclides. DOE is in the middle of a multi-decade, multi-billion-dollar cleanup there, and a recent Superfund decision for one portion of the site raises a number of significant legal issues. This Article addresses some related questions: Should radionuclides get less stringent cleanup than other equally harmful pollutants like mercury and polychlorinated biphenyls?

Superfund practitioners are waiting to see whether the U.S. Environmental Protection Agency (EPA) will designate perfluorooctanoic acid and perfluorooctane sulfonate, two chemicals in the per- and polyfluoroalkyl substances (PFAS) group, as CERCLA hazardous substances. Such a designation may lead to selected remedies being modified and further work being required at Superfund sites where remedies were believed to be complete. This Article explores potential future liability by reviewing provisions of the 2021 Remedial Design/Remedial Action (RD/RA) Model Consent Decree.

Editors' Summary: TSCA provides EPA with broad authority to address potential hazards posed by the manufacture, processing, distribution in commerce, use, and disposal of chemical substances and mixtures. In this first of a three-part series, the authors begin a detailed examination of the statute and regulatory program. They review the origins, objectives, and key components of TSCA, and then analyze TSCA's scope -- focusing particularly on definitional issues and exclusions.