Oyo. mended that eonsideration be given to erscustion when the game dose rate reading st three feet vas, for example, about 6.2 r/br at BY3 hours. Roughly, this would correspond to about 460 repa/hr of beta at 20 oenti~ ‘peters, Of course, this activity deeays and also it is presumed that personnel would be sent indoors, st least for a few hours. On the ether hand, it strongly suggests that biologically significant doses may be delivered to the feet if not protected, Skin lesions were frequent on ths bare fest of the natives evacusted during CASTLE. This probably vas a eombinstion of beta dose from material on the ground end from thet scuffed up over the bere fest and then elinging to the skin, (Ko lesions were sooner,thonothSeredebeten fotSAeoteeateen It would be expected thet normal elosed-type footwear (as compared to open sandals) would afford adequate protection to the fest from such high beta doses as discussed here. There is still no guarantees that beta radiation from material on the ground will not deliver significant biclogical doses to the ankles and perhaps lover legs, after personnel are released fron staying indoors. For eaxanple, if the beta dose at 10 centineters above the ground is 460 reps/hr at E43 hours, it wuld be about 190 repshr three hours later and 120 reps/hr six hours later. One further possibility {3 the accurmlation of radioactive material around the ankles and lover legs resulting from norzal walking about the area. This is discussed under Folicy III. pn bie J or AS Ax