The Mississippi Test Facility (MTF), Bay St. Louis, Mississippi, is evaluated as a potential location for safely testing and demonstrating equipment designed to control hazardous materials spills. The study includes an examination of all factors, which influence the selection of an appropriate site, with special emphasis on the assured protection of the environment. Within the identified constraints, three candidate areas were selected for more detailed investigation: the Northeastern Buffer Zone, the Southeastern Buffer Zone, and the North-Central Fee Area. The report recommends the use of a 100-acre site located in the Northeastern Buffer Zone to conduct a three-phase development program. The program includes detailed initial and continuing environmental baseline monitoring, construction and operation of a semi-closed test facility, and continuing analysis and upgrading of program elements. The recommended test facility includes the following: an artificial stream channel, test ponds, landspill study areas, and supporting elements.