The document provides a discussion of the treatment technologies applicable to wastes that are subject to the land disposal restrictions (LDR), which were mandated by Congress as part of the 1984 HSWAs to the RCRA. The document does not include every possible technology that may be used to treat wastes subject to the LDR, but discusses those most commonly used. The technologies discussed include those that are demonstrated (commercially available) and have been proven to substantially diminish the toxicity of hazardous constituents and/or to reduce the likelihood of migration of such constituents from the waste of concern. These technologies include those that treat wastewaters (wastes containing less than or equal to 1% filterable solids and less than or equal to 1% total organic carbon) and those that treat non-wastewaters.