ROJGA The construction camp on Rojoa was symmetrically and compactly arranged and as a result a single sewer line served all facilities. Location of the site permitted this line to be extended tangentially for location of outfall and disposal of sewage into the lagoon, Since there were no beaches contiguous to the point of disposal, and since the campsite proper was removed therefrom, only 300 feet of subaqueous outfall were required by this installation. ENGEBI The construction camp on Engebi was larger than those on other experiment islands and development of the site followed the pattern of an arc described using the location of zero as the center. The facilities and sewer system covered an elongated area. Available elevation for slope of sewers was limited and sewers were required to slope to a central point rather than in one general direction concentric with the axis of the developed area. From this central point the main sewer and subaqueous outfall line extended nearly due south for most advantageous location of the point of disposal. No beach was affected by this installation and only normal protection of ad- jacent tidal lands from muisance was required. A subaqueous outfall sewer 500 feet long was provided for disposal of sewage, J APT AN The site of the facilities and installations on Japtan Island essentially consisted of two separate areas, the campsite being located in the northwesterly portion and the animal colony being located in the southwesterly portion. Ground elevation of Japtan Istand is slightly higher than other islands of the Atell; hence more slope for sewer installation was available, This enabled the design to provide for a single unified system, despite the separated locations and the relatively greater distances involved. Advantageous location of outfall sewer was at the southerly end of the island near the "Deep Entrance" to the lagoon, From this point the main sewer line followed the shore line to the camp area, serving isolated installations between, The animal colony was located immediately adjacent to the land end of the outfall sewer and service to these facilities was extremely economical. queous outfall sewer were provided. Three hundred feet of suba- GARBAGE AND TRASH DISPOSAL Garbage and trash disposal presented no design problems because, in accordance with recommendations of the Reconnaissance Report, no special facilities were provided. Garbage was dumped at sea, and trash was burned in isolated pits provided on the lee side of each camp island, 5-201