Steam heated storage water heaters were used to supply hot water to fixtures and equipment in mess halls, bakeries, and laundries on all locations, All of these buildings were located near boiler houses where steam was available for the water heaters. In the infirmary and nurses quarters on Parry and in the post exchange, barber shop, and post offices, on Eniwetok and Parry, electric storage water heaters were used to supply hot water to fixtures. In these buildings, the hot water demand was not excessive and sufficient electric power was available. Oil~fired water heaters were used in the infirmary on Engebi and in the dispensary on Eniwetok. The demand for hot water in the infirmary was not great, but electric power at this location was limited. Heaters for the dispensary supplied fixtures in the kitchen in addition to regular plumbing fixtures. Steam was not available and the demand for hot water was too great for economical use of electric heaters. Underground oil piping from elevated oil tanks located outside the buildings supplied oil-fired water heaters and oil-fired equipment in kitchens and laundries, No particular code or manual was used in laying out the plumbing waste and vent systems. Soil and waste piping were sized according to usual practice. All vent pipes for plumbing in the aluminum buildings were run outside the buildings walls and terminated under the eaves of the buildings. Vent piping was run in this manner because of the diffi- culty and expense involved in making water tight flashings around pipes passing through the two corrugated roofs. This method of venting proved to be satisfactory. INTERIOR WIRING FOR PERSONNEL BUILDINGS The Reconnaissance Report recommended the use of corrosionresistant wiring materials for buildings intended for use in more than one operation and of open wiring for expendable buildings and for tests. In accordance with these recommendations, considerable time was spent in investigating various types of conduit, outlet and junction boxes, cover plates, and similar fittings, in order to determine which types of materials would most successfully resist corrosion, fungus, and other deleterious effects. Initially, however, the best preventive measure was keeping to a minimum the number of outlets required. The following list shows the considerations which were applied to the selection of materials: 5-124 1. Cost per outlet (material and labor). 2. Corrosion and fungus resisting qualities. 3. Per cent of expected breakage in shipment to Jobsite.