ur/hr. The highest levels on the island were measured aroun a concrete instrument bunker near the lagoon shore. Other regions where high levels were found were located near the western end over a desert-like plain and near depressions with black algae cover. Readings with the G-M counter in these regions ranged from 110 to 217 ur/hr. Soil samples were taken from two areas on the western end where the highest levels were measured. The analyses of the samples indicated that the major contributors to the exposure rate were *°co, *°?™ph, and ***Sb. These three emitters probably account for about 85% of the total exposur rate, with the remainder due mostly to **’cs (12%). 1°. Rh, 1°2Rh, Figure 9). F. Lukoj + °° Rh, and SS on, were also detected *°°Eu, (see - Jelete These two islands in the southwest part of the atoli are quite similar to one another. They are small, more or less round with black coral rock overgrown with ipomea vines along the shore areas. Inland the islands had very dense vegetation. The soil was very damp with considerable thickness of decaying organic matter. These islands also had large bird populations. Survey of these islands was generally done by circling each island about 100 ft. inland. Spot measurements were made in the interior with at least one transect across the island through the dense vegetation. The radiation levels on Lukoj were quite high. On one short transect the range was 61 to 104 ur/hr with the scintillation counter and 63 to 130 ur/hr with the G-M counter. On another transect which cut more nearly across the center of the island the ranges were 100 to 171 ur/hr and 83 to 197 ur/hr. A soil sample was taken near the center of the island where the higher levels were measured. This soil sample was analyzed on both NaI(T1) and Ge(Li) spectrometers. The spectra indicated that the major y-ray emitters present were °°co, **5sb, *°?™pn, *®*Eu, and **7’¢s - 34 - eT yy ee SOF ME mu one A re et eeee