The Superfund Innovative Technology Evaluation (SITE) Program was developed to assist the development of hazardous waste treatment technologies necessary to implement new cleanup standards which require greater reliance on permanent remedies. As part of the SITE program, four stabilization and solidification processes have been performed, six treatability studies are underway, and five demonstrations are in the planning and site selection phase. During these demonstrations, the effectiveness of the stabilization/solidification processes was evaluated by measuring the chemical and physical characteristics before and after treatment. An overall conclusion, from the completed SITE demonstration on Stabilization Processes, is that a Treatability study should be required before selecting a remediation technology. Also, it appears that each stabilization process has similar capabilities to treat metals and inorganics, and significantly different capabilities to handle organics.