66 mrem/y and 69 to 90 mrem/y for the 2 diets. If the northern islands at Rongelap were inhabited continuously, the estimated doses for the various islands would range from 90 to 330 mrem/y for the MLSC diet and from 150 to 580 mrem/y for the BNL diet. For reference, these doses can be compared with U.S. external background doses of 54 mrem/y weighted for the entire U.S. population; 107 mrem/y for Denver, Colorado; and about 182 mrem/y for Leadville, Colorado. +3 A more detailed discussion of the U.S. external background doses is given in the summary. For further reference, the estimated doses at the atolls, even though they are calculated using average values, can be compared to the U.S. Federal guideline of 500 mrem/y in excess of background for an Bikey : : individual.** The 30- and 50-y integral doses are listed in Tables 17 and 18, respectively, for all atolls. For Likiep, Wotho, Ujelang, Mejit, Ailuk, Taka, Jemo, and Bikar the 30-y integral dosesall fall between 0.055 and 0.14 rem for the MLSC diet and between 0.09 and 0.7 rem for the BNL diet. Doses for Utirik range from 0.25 to 0.72 rem for the MLSC diet and the BNL diet, respectively. If Rongerik were inhabited continuously, the estimated doses would range from 0.94 to 1.6 rem for the MLSC diet and !.5 to 3.8 rem for the BNL diet. The inhabited southern islands of Rongelap Atoll have 30-y integral, whole-body doses for the MLSC diet ranging from 0.76 to 1.3 rem and for the BNL diet they range from 1.2 to 2.5 rem. If the northern islands of Rongelap were populated continuously, the estimated doses for the MLSC diet would range from 2 to 7.4 rem and for the BNL diet they would range from 3.4 to 14 rem. These 30-y integral, whole-body doses can be compared with the recommended, maximum population dose of 5 rem above background in 30 y according to the U.S. Federal guidelines.“ With the exception of the uninhabited northern islands of Rongelap and the uninhabited Rongerik, the estimated doses are for the most part from 5 to 100 times less than this guideline. Tables 19 and 20 list the 30-y integral doses for Likiep and Rongelap Islands, respectively, with the contributions of the various radionuclides to the total dose. As observed at Enewetak and Bikini, 137, is the major contributor to the estimated dose. Second is 905, with the transuranic radionuclides relatively minor contributors. plutonium and americium being Likiep and Rongelap Islands are representative of all of the atolls and islands as far as the relative significance of the various radionuclides. 41