In the proposed rule, EPA will extend this exemption to waste derived from the treatment, storage, or disposal of those same listed wastes, provided that no characteristic is displayed. For example, ash resulting from combustion of an ignitable listed waste would no longer exhibit the characteristic of ignitability, thus, would no longer be subject to hazardous waste regulation. Presently, there are twenty-nine wastes that are listed solely for a characteristic. Of these listings, F003, which is listed solely for ignitability, is the most widely generated. EPA is requesting comment on whether or not this exemption should be extended to F003 due to its unique listing description.
Mixed wastes are hazardous wastes that are also radioactive.
November 19, 1999. The HWIR Exemption would exempt listed wastes that meet chemical-specific exemption levels from hazardous waste management. These levels have yet to be determined, however, EPA is expecting to produce them in the near future. In the past, a listed waste could be treated to a level in which it could be placed in a Subtitle C landfill, however, the waste would still retain its listing. This would eliminate the requirement that listed waste treated to the risk-based levels be placed in a Subtitle C landfill when disposed.