The final from of the stabilized/solidified waste must be stable, compatible with the environment, and, if possible, of commercial use. Great considerations should be given to waste and process compatibility to avoid detrimental effects on final product. These detrimental effects include heat generation, release of toxic materials, loss of strength, etc. Martin and Johnson (1986) summarized compatibility considerations of selected waste categories. The following section presents the most important characteristics of the stabilized/solidified waste that have been evaluated and found to be acceptable.