of the root zone. The depth which included most all of the root activity varied by age and by species but supports our use of the 0-40 cm profile depth for developing the concentration ratios. Food Concentration. As a result of the paucity of available food products which can be directly analyzed to determine the radionuclide concentrations in locally grown foods at the atoll, we have predicted the radionuclide concentrations in foods for each island by multiplying the average island soil concentrations for the 0-40 cm depth as discussed above by the concentration ratios developed for the 0-40 cm profile as discussed in "Concentration Ratios". These predicted radionuclide concentrations in foods are then used in conjunction with the diets and dose models to develop the dose assessment for alternate living patterns. Marine Foods The concentrations in marine fish, shellfish, are listed in Table 14 along with the source of data. and invertebrates Much of the data were abstracted from the 1973 Radiological Survey Report. ! The 2394240), and 24lan data are recently developed by V. E. Noshkin and are lower than previously published values; these fish data, when compared with the corresponding atoll lagoon water concentrations, are more in line with other published concentration ratios (pCi/g in fish/pCi/g in water). anomalous and we feel The previously published transuranic data are the current data are based on reliable collection and analytical methods and they are therefore used in this evaluation. Other assumptions have been identified in the foot notes of the table. - ics 19 -