and other debris, apparently mangled by concussion, and there are remnants of camp structures, which have also suffered from the blast. On Engebi there are also large numbers of concrete slabs which were previously used as quonset bases. The vegetative ground cover is very sparse on most shot islands. The area immediately adjacent to the shot tower and probably for a 1,000 foot rad= ius around the tower, is exposed ground with no apparent growth. radii from the shot tower, weed growth has started. In larger On Sngebi, this takes the form of dense areas of burrs standing on grassy stems, approximately 18" high. On other islands, the burrs are not so mich in evidence, but weedy growth has formed a ground cover on all shot islands, to some degree. There are a few coco palms which have gotten a start, and have sprouted to one to two feet in height on Biijiri and Runit. There are no bushes or other trees. There is considerable discarded material around all of the experiment buildings, such as wire and expended electrical equipment. None of the material now on the shot islands is regarded as salvagable to any degree of economic justification, except possibly buried cable and copper coaxial tubing. Radio Activity on Shot Islands. The residual radio activity on shot is- lands is found to be appreciable for approximately 1,000 ft in radius from the shot tower locations.. However, it is found to extend to greater distances in certain cases, and the intensities do not appear to be consistently a function of radius from the center of the tower, This means that any future construc- tion activity should be accompanied by a system of monitoring. In an effort to determine how mich movement of earth would be necessary in rehabilitating the shot tower area, on Aomon, a vertical section on zero line near the shot tower area was made and meter readings of various portions of this vertical section were taken. (a) Conclusions are as follows: If approximately six inches of coral are removed, radio= Tle