On May 9, 2000, we published an Immediate Final Rule at 65 FR 26750 to authorize changes to Montana's hazardous waste program under the Resource Conservation and Recovery Act (RCRA). At that time, we determined that the changes to Montana's hazardous waste program satisfied all requirements for final authorization and authorized the changes through an Immediate Final Rule. The Immediate Final Rule was to be effective on August 7, 2000 unless significant written comments opposing the authorization were received during the comment period. At the same time, in the event we received written comments, we also published a Proposed Rule at 65 FR 26802 to authorize these same changes to the Montana hazardous waste program. As a result of comments received on the Immediate Final Rule, we withdrew the Immediate Final Rule on August 8, 2000 at 65 FR 48392 and went forward with the Proposed Rule. By this action, we are issuing a Final Rule authorizing the changes to the Montana hazardous waste program as listed in the Immediate Final Rule at 65 FR 26750 and responding below to each of the comments received.