line of flow between the distillation units and the fresh water Storage tanks, The additional security and protection was considered justified in view of the minor additional cost of this equipment and of the materials required for operation. Hypochlorinators have a wide capacity range and hence were standard- ized. Individual installations varied in accordance with the size of the meter used. The meter constituted the actuating device for control of rate of application of the sterilizing solution, 7. The fresh or distilled water surface storage tanks received 8. The fresh water pumping station functioned in a manner simi- the product of the battery of distillation units and furnished the source of supply for the fresh water pumps. This fresh water was accumulated and stored in tanks at ground elevation. Equalization between varying rates of distillation caused by the varying number of units in simitaneous operation and the varying rate of demand upon the fresh water pumping station was accomplished by the elevated storage tank. lar to the salt water pumping station and differed only in capacity and the kind of water pumped. 9. The fresh water distribution system functioned in the same manner as the salt water distribution system and in general paralleled that system in extent and location. There were no cross connections between these systems; therefore there was no possibility of contamination. 10, The fresh water elevated storage functioned in a manner simi- lar to the salt water storage, both storage tanks being placed upon a common elevated platform surmounting the common supporting tower. ENIWETOK WATERWORKS SYSTEM Raw water intake consisted of a vertical well-like structure 4 feet, 6 inches in diameter, constructed of prefabricated concrete pipe. The intake well was located just off shore on the lagoon side of the island near the northerly end of the island. Fram the bottom of this structure a short section of 15 inch pipe extended into the lagoon, This pipe conducted the sea water into the intake well, which was also the terminal point of the suction lines of the raw water pump station, The raw water pump station was located ashore just south of the intake and housed the salt water pumps. This equipment consisted of three electric-motor driven, horizontal centrifugal pumps, each having a capa- city of 300 gpm and one standby gasoline-driven horizontal centrifugal pump with a capacity of 300 gpm. The electric motor-driven pumps were equipped for automatic control of operation, the starting and stopping sequence of each pump being regulated by preestablished water levels in the salt water elevated storage tank. Two pumps operating in parallel would thus furnish the volume required by a fire pumper unit connected to a fire hydrant. 5-188