The Environmental Protection Agency (EPA) and the State of New Mexico filed a lawsuit under the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA) against Chevron Mining Inc. (CMI). CMI is the owner and operator of the Chevron Questa Mine Superfund Site, an inactive molybdenum mine located in Taos County, New Mexico. CMI performed mining operations at the site between 1965 and 2014. (The original site owner/operator was The Molybdenum Corporation of America, which changed its name to Molycorp, Inc. and, in 1977, became a subsidiary Unocal Corporation, which was acquired by Chevron Corporation in 2007.) The lawsuit sought recovery of federal and state costs incurred responding to releases of hazardous substances at the site. Without admitting any liability, CMI agreed to pay $5.3 million in past costs, to perform remedial work at the site, and to pay the EPA’s future costs associated with oversight of that work.