On June 10, 2019, the U.S. Supreme Court granted review of a Montana Supreme Court ruling that allows private landowners to challenge the EPA’s cleanup plan at one of the nation’s largest Superfund sites. WLF filed an amicus brief urging review. WLF argued that the Montana Supreme Court should have treated the case as a classic instance of conflict preemption. Instead, in allowing the landowners’ case to proceed, the state court gutted at least five discrete parts of CERCLA, including a provision that bars legal challenges to an EPA cleanup plan and a provision that bars cleanups conducted without EPA approval. In October 2018, the U.S. Supreme Court called for the views of the United States as to whether the Court should grant review. The United States recommended that review be denied. In disagreeing with the United States and granting review, the Court has confirmed the importance of reestablishing a uniform interpretation of CERCLA.