On July 8, 2022, the U.S. Court of Appeals for the District of Columbia Circuit (D.C. Circuit) rejected a challenge to the listing of a groundwater contamination plume on the National Priorities List (NPL). The decision in Daikin Applied Americas, Inc. v. EPA reaffirms the difficulty that attends challenging NPL listings as well as the wide latitude Congress granted the Environmental Protection Agency (EPA) under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) to define the scope of Superfund sites during the listing process. (more…)