B. Eneu Eneu, the second largest island, is located along the southeastern rim of the Atoll near the main channel opening into the lagoon (Figure 1). The island was the logistics center for the atoll during the testing period. A major aircraft runway is located on the southern part of the island. Several piers are on the lagoon side. Towers are located at both ends and near the island center. Buildings are numerous - a large assembly building near the south tower, the terminal building and hangar near a large concrete parking area adjacent to the runway, and personnel housing along the Village Road and along the northeastern ocean beach. Only a few parts of the island seemed to have escaped the construction activity, notably the central region in the northern half, where there were a number of coconut-bearing palms. In general, the island was less cvergrown with wild brush than was Bikini. Radiation levels on Eneu were quite low - among the lowest measured on the atoll. This island was the farthest away from the main testing locations along the north and northeast reef and was also favorably located to avoid fallout, including that carried eastward from shot Bravo. Measurements were made primarily near the road which runs along the lagoon side of the island. This is the area of most probable past or future native settlement. Survey readings were recorded every 300 ft. beginning at the air- craft hangar and ending near the north tower {see Figure 6). TLD's were also placed along the road and left for approximately two weeks. Gamma spectral measurements were made in front of the aircraft hangar and about 1200 ft. north of the hangar in a clearing adjacent to the road. Survey meter measurements were also made around the south tower, along two transects north of the parking area and near the northern end, and along the ocean side of the isiand about 50 ft. inland from the northern perimeter. The survey meters indicated radiation levels of from 2 uxr/hr to a maximum of 10 ur/hr. The highest levels were found in the northeast, slightly inland. The lowest levels were near the runway on Cross Transect 1. For such smali