Since latrine facilities on the Shot Islands are to be expended by experiment operations, the use of plumbing pipe and fixtures ordinarily adopted to minimum cost installations is contemplated. The expected useful life of this type of construction under the corrosive conditions present would not greatly exceed that required by experiment operations and ultimate economy of expend-~ able costs is thus accomplished." In compliance with these requirements, salt water and distilled water mains were installed to supply the various buildings. Water closet tanks, urinal flush valves, and hose bibs were connected to the salt water system. Lavatories, sinks, service sinks, showers, and all other fixtures and equipment requiring water were supplied from the distilled water system. Waste from all fixtures and equipment was discharged to common sewer drain lines, Because of the corrosive effect of salt water, distilled water, and salt spray in the air, considerable thought and study was given to the selection of materials used for plumbing fixtures, pipe and fittings. When vitreous china fixtures were obtainable, they were selected for all plumbing fixtures. These included water closets, closet flush tanks, urinals, service sinks, sinks, lavatories, and special fixtures in the infirmary and dispensary. Enameled cast iron combination sink and laundry trays and enameled cast iron bath tubs were used in the dispensary at Eniwetok because these fixtures were not obtainable in vitreous china. Stainless steel sinks were provided and installed in all mess hall kitchens. In the following buildings, sheet metal sinks were installed as directed by J-Division: Laboratory Building Building #57 Eniwetok Island, Stainless Steel Laboratory Building Building #232 Parry Island, " . Photo Laboratory Building #210 Parry Island, " " Rad Safe Building Building #323 Parry Island, . " Animal Quarters Building #13 Japtan Island, Galvanized Steel Autopsy Building Building #49 Japtan Island, " " Vitreous china closet and urinal tanks with rubber fittings were pre- seribed in the Reconnaissance Report. and hard rubber flush valves and ball cocks were specified for closet tanks as well as hard rubber or plastic connections between tanks and closets. However, because these items were not obtainable at the time orders were placed for the fixtures, regular trim was accepted. After investigation, self-closing urinal valves were specified instead of tanks. These valves were found to be cheaper and anticipated to be more durable than tanks with ordinary fittings. 5-122