The Environmental Protection Agency (EPA or Agency) today is granting a petition submitted by the U.S. Department of Energy (DOE), Richland, Washington, to exclude certain wastes to be generated by a treatment process at its Hanford facility from being listed as hazardous wastes. This action responds to DOE's petition to exclude these treated wastes on a ``generator-specific'' basis from the hazardous waste lists. Based on careful analyses, the Agency has concluded that the disposal of these wastes, after treatment, will not adversely affect human health and the environment. This final rule excludes the petitioned waste from the requirements of hazardous waste regulations under the Resource Conservation and Recovery Act (RCRA), but imposes testing conditions to ensure that the future-generated waste remains qualified for delisting. This final rule will also allow DOE to proceed with critical cleanup at the Hanford site. The primary goal of cleanup is to protect human health and the environment by reducing risks from unintended releases of hazardous wastes that are currently stored at the site.