The EPA is removing the final rule appearing at 56 Federal Register (FR) 67197 (December 30, 1991) insofar as it excluded hazardous waste treatment residue generated by Reynolds Metals Company (Reynolds), Gum Springs, Arkansas, from the lists of hazardous wastes contained in 40 CFR 261.31 and 261.32 (hereinafter all sectional references are to 40 CFR unless otherwise indicated). This decision to repeal the exclusion is based on an evaluation of waste-specific information provided by Reynolds and obtained by EPA either independently or from the Arkansas Department of Pollution Control and Ecology (ADPC&E) subsequent to the promulgation of the exclusion. After the effective date of this rule, future spent potliner waste generated at Reynolds' Gum Springs, Arkansas, facility will no longer be excluded from the requirements of hazardous waste regulations under the Resource Conservation and Recovery Act (RCRA) and must be handled as hazardous waste in accordance with sections 260 through 266, 268 and 273 as well as any applicable permitting standards of section 270. This rule does not remove or affect EPA's reasoning or evaluation as it related to the modified EPA Composite Model for Landfills (EPACML).