Abstract: An economical and efficient method for forming a waste containing monolith which meets applicable waste disposal laws, rules and regulations. Removable walls are attached to at least one side of the monolith, thereby forming an interior volume defined by the removable walls and at least one side of the monolith. Waste is placed within the interior volume, whereupon it is submerged in a flowable, curable, monolith forming material (typically concrete) by filling the interior volume with a monolith forming material, and allowing the monolith forming material to cure to a solidified state, thereby forming an expanded monolith integral with the existing monolith. The walls are then removed, thereby leaving the waste encased within said expanded monolith and allowing the removable walls to be reused for further expansion of the monolith.