Aerokoj-Eneman Complex: Aerokoj, Aerokojlol Bikdrin, Eneman Lele | - * 6-10 * 1-570 East Eneman West Eneman 1-10 20-570 Enidrik 3-235 East Enidrik West Enidrik 3-30 10-235 Luk oj 60-200 ®°co, **® sp, 1°2Mpy, f°, *FF sp, 2o2@Mpy ©°co, *** Sb, i°2Mpy, Jelete 60-130 * Oroken 15-45 * Bokaetoktok Bokdrolul 10-35 20-50 * Bokbata = eee 1-10 10-30 Aomen~Iroij Complex: Aomen Lomilik Odrik, 5-20 20-330 Iroij 10-40 *No sOil sample or field spectra measurements. ©°Co, *?7 Cs * *°co, **®sb * Department © offices It should be noted that these are the ranges of our measure- ments. It is guite likely that there are locations where the local exposure rates are higher than the upper limits given in the table. Since *°’cs has a half life of 30.5 years as compared to half lives of 2.7 and 5.2 years for ***Sb and °°Co, respectively, the exposure rate levels on islands where *37cs was the major contributor, most importantly Bikini, can be expected to persist at almost the current levels for some time to come with only slight reductions due to decay and weathering. Studies of **’cs penetration into soils usually have indicated that in undisturbed soils with high organic content very little penetration of *°’cs takes ~ 41 -