The EPA (also, "the Agency" or "we" in this preamble) is granting a petition submitted by Ormet Primary Aluminum Corporation (Ormet) to exclude (or "delist") vitrified spent potliner (VSP), generated and treated at the Ormet facility in Hannibal, Ohio from the lists of hazardous wastes. Spent potliners from primary aluminum reduction are listed as hazardous waste number K088 under the Resource Conservation and Recovery Act (RCRA). Today's action conditionally excludes the petitioned waste from the list of hazardous wastes only if the waste is disposed of in a Subtitle D landfill which is permitted, licensed, or registered by a State to manage industrial solid waste.