teens patainiacllbeRiniiniah The means of these two factors - eee (-.059 per cm) could be used to calculate the subsurface activity on islands where such data are lacking. The mean specific-activity of the rooting zone A (0-40 cm depth) is: — 0 A= aii For Bikini 2.31 and pCi/g, - e -40u essen (2) Eneu, the mean rooting zone activities are 28.6 pCi/g and respectively. The relation between these levels and human activity fell dosage is discussed in Sections 3.2 and 3.4. Although the smoothly with depth, the local and Eneu did not. istand-distributed mean activity at some sampling sites on Bikini These were locations where the ground had been disturbed mechanically during one or more previous trash cleanups or perhaps during the planting of trees. Often the buik of the irregularity occurred within a scheduled layer that would were calted for). be Furthermore, for excavation (if such decontamination such sites would be monitored during the course of excavation and could receive additional treatment if necessary. 2.3 Water Supply 2.3.1 Rain Water and Coconut Fluids. fresh ground water is annual rainfall is in short supply. in the range drought and water scarcity are usual At Bikini 100-200 frequent. cm (40-80 Atoll, although inches), Cistern water total periods therefore of is the make an important contribution to Traditionally, coconut fluids fluid intake. More imported canned soft drinks are being used throughout the Marshall 9006020 Islands source of drinking water; it is uncontaminated and is much preferred to the more or less brackish ground water. also In the Marshall 21 recently, Islands.