Existing 'decision room' facilities were studied to determine the initial feasibility of constructing a 'decision room' facility for development and use of environmental simulations. The study concluded that 'decision room' technology is feasible and recommends a 'research and analysis facility' oriented to the development of a prototype facility and its supporting capabilities as an appropriate first step for EPA. The architectural renderings of such a facility are presented. The study indicates that recent developments in computer based technologies have so improved information processing, storage, retrieval, and presentation that EPA requirements involving large amounts of complex information handling in these areas can be met.