DEFINITIONS.

SEC. 7331. [15 U.S.C. 8931] DEFINITIONS. In this subtitle: (1) Director.—The term “Director” means the Director of the United States Geological Survey. (2) Highly fluorinated compound.— (A) In general.—The term “highly fluorinated compound” means a perfluoroalkyl substance or a polyfluoroalkyl substance with at least one fully fluorinated carbon atom. (B) Definitions.—In this paragraph: (i) Fully fluorinated carbon atom.—The term “fully fluorinated carbon atom” means a carbon atom on which all the hydrogen substituents have been replaced by fluorine. (ii) Perfluoroalkyl substance.—The term “perfluoroalkyl substance” means a chemical of which all of the carbon atoms are fully fluorinated carbon atoms. (iii) Polyfluoroalkyl substance.—The term “polyfluoroalkyl substance” means a chemical containing at least one fully fluorinated carbon atom and at least one carbon atom that is not a fully fluorinated carbon atom.