several hundred bequerels. population. Cobalt 60 was not detected in the control The average ratio between 13765 and 604 body burdens in the ex- posed copulation was 490. The 1370, to 8066 activity ratio was assumed to be of the same magnitude for the control population. bedy burden was estimated to be well below the MDL, Because the baseline 6005 it was assumed to be .2% of the control group body activity for 1370, in the determination of the long term biological remove rate constant. Tables 1 through 4 present the January and May 1979 13765 body burdens, ‘elapsed time and long term biological removal rate constants as measured in Marshallese adult males, adult females, adolescents and juveniles. Data pre- sented in these tables are for individuals whose body burdens in January and May are significantly above the baseline 1376, body burden for the control population. A body burden was included in the data set if it exceeded the mean 13765 body burden of the control population plus three standard deviations of the mean. Table 5 presents similar data for 6960. Because 6065 was not detected in the control population, no acceptance criteria were applied to the body burden in this table other than the quantitative presence of two consecutively decreasing 600, bedy burdens. RESULTS Table 6 summarizes the individual data presented in Tables 1 through 4 for 13765 and compares the data with values listed in ICRP publication 10 (ICaP6s) and NCRP report 52 (NCRP77). The biological removal rate constants for adult male and adult female Marshallese are in agreement with previously reported data. The biological removal rate constant for adolescent Marshallese is similar to the value reported in NCAP report 52 (NCRP77) for juveniles. § The

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