tenths the volume of a teaspoon. The mass per m° and corresponding volume at Utirik Island was 0.46 g and 0.20 cm. 0.48 cm? mn. For Sifo Island it was 1.5 g nm” and These mass and volume estimtes were for the point in time at which all the fallout was on the ground, the cessation of fallout. The values for Utirik and Sifo Islands were estimated by ratio of the exposure rate at Rongelap Island at the end of fallout, at the same point in time. The amount of fallout dust ingested per meal would be dependent upon the amount that fell into utensils and plates during preparation and during consumption. Resuspension and subsequent deposition on food and preparation of food on dusty surfaces would be secondary pathways. During the mid-day meal at Rongelap Island, BRAVO dust probably fell directly onto plates and on the surfaces of fish which were drying in the open. The area of one plate exposed to BRAVO fallout plus the area of a small fish are approximately 0.04 mn. Lf a 30 minute lunch interval beginning at 5 hours post detonation was assumed to be the plate and fish exposure interval to dust, then about 40 mg (about 4/1000ths of a teaspoon) would fall on this eating area at Rongeiap Isiand. During the preparation of the evening meal about 0.1 m” of surface area was assumed as the family food preparation area exposed to dust during fallout deposition. average, about 4.5 people were estimated in each family (Sh57). On the Therefore an ad- ditional 100 mg of BRAVO debris per family member was estimated to be consumed with the evening meal at 12 hours post detonation. This corresponds to a total per person ingestion of about 90 uCi of I-131; 30 uci at 5.5 hours post detona- tion and 60 "Ci at 12 hours post detonation. As indicated by the reassessment of urine bioassay in a previous section, a 93 uCi intake of I-131 gives agree- ment between current biotransport models and the measured I~131 in urine on day 17. Therefore ingestion of fallout dust with meals provides a rational pathway 30