Abstract: A process for treating contaminated sludges such as municipal sewage sludge, industrial waste sludge and riverbottom sludge with calcium oxide (CaO) and/or calcium carbide (CaC.sub.2) with reclaiming and recycling of calcium oxide (CaO) from the reaction materials. The process is also applicable for dechlorinating PCB contaminated sludges.

Abstract: Hazardous radioactive waste is compacted and cast into safely handled monolithic castings having a radiation barrier wall completely enclosing the radioactive waste by centrifugal casting processes in which the barrier wall may be either a pre-formed shell transported to the jobsite or it may be formed by biaxial centrifugal casting and curing of the barrier wall in a mold. When a pre-formed shell is used, means are provided for thickening the radiation barrier if necessary by biaxial casting of additional barrier material inside of the shell. Castable radioactive material is cast inside the barrier wall before removal of the casting mold from the finished cast monolith. The cast monolith is supported for rotation as the mold is removed therefrom so that additional impact resisting and radiation barrier material can also easily be applied to the exterior surface monolith if radiation leakage exceeds tolerance levels.

Abstract: Hazardous radioactive waste is compacted and cast into safely handled monolithic castings having a radiation barrier wall completely enclosing the radioactive waste by centrifugal casting processes in which the barrier wall may be either a pre-formed shell transported to the jobsite or it may be formed by biaxial centrifugal casting and curing of the barrier wall in a mold. When a pre-formed shell is used, means provided for thickening the radiation barrier if necessary by biaxial casting of additional barrier material inside of the shell. Castable radioactive material is cast inside the barrier wall before removal of the casting mold from the finished cast monolith. The cast monolith is supported for rotation as the mold is removed therefrom so that additional impact resisting and radiation barrier material can also easily be applied to the exterior surface monolith if radiation leakage exceeds tolerance levels.

Abstract: Spills of hazardous materials are treated at the site of the spill using an integrated spill responder system which enables personnel to remain at a safe distance from the spill. The mobile, fully self-contained system is dispatched to the spill site and uses a remotely controlled spill treatment head which is maintained in close non-contact proximity to the spill. The system continuously monitors the progress of the treatment operation through various sensors mounted on a boom assembly, or by vacuum drawing samples of the spilled material and chemical treatment agents mixed therewith aboard the spill responder vehicle. Once the spill has been reduced to a non-hazardous form, the treated material can be left at the site of the spill, removed by standard vacuum trucks, or removed by the spill responder system itself by using internal storage tanks.