Storage concept, selection

In this paper, I will limit my discussion to those forces which result from the engineering concept used for storage and from the location of the storage activity. In general, the rupture forces which depend on waste form and container characteristics do not influence the selection of storage concept or site. 

RCRA was passed to manage nonhazardous and hazardous wastes and underground storage tanks, with an emphasis placed on the recovery of reusable materials as an alternative to their disposal. This act introduced the concept of the separate management of hazardous and nonhazardous wastes, and defined procedures to identify whether a waste is hazardous or nonhazardous. A waste exhibits the characteristic of toxicity, classified as a hazardous material, if the concentration of any of 39 selected analytes in the Toxicity Characteristic Leaching Procedure (TCLP) extract exceed regulatory action levels. 

Nutritional scientists are attuned to the concept that some nutrients occur in the body as a "storage form," that can be mobilized during times of need. This concept applies to energy stores, vitamin A, calcium, and protein (muscle protein is readily mobilized), but probably not to vitamin Most of the body s vitamin (70 80%) occurs in muscle, where much of it resides as a cofactor in glycogen phosphoiy-lase. Evidence suggests that during dietary vitamin deficiency the vitamin is not selectively released from this enzyme and used by more vital B -requiring enzymes in the body (Cobum ft al, 1991). 

Site evaluation efforts have narrowed the potentially attractive locations to three or four of the major AEG sites. We are now in the last stages of evaluation among these sites, and a choice will be made at the same time as selection of the concept to be used for storage. 

For the selection of the final production process ecological, economical, and technical aspects were compared. Criteria for the route-selection were catalyst activity, stability and storage properties of the catalyst, number of reaction steps of the different processes, concepts of metal recovery and recycle, safety aspects of the coupling reactions, and other more. 

---