concentrations on several islands. Subsequent to cleanup, an updated data bank was developed including external gamma exposure rates and radionuclide concentrations in the soil on all islands. An updated assessment has been completed for Enewetak Atoll] which includes radiological dose estimates for all proposed living patterns at the atoll. 14 In addition to resettlement options at Bikini and Enewetak Atolls, the U.S. Government had an interest in evaluating the radiological condition of 10 additional atolls and 2 islands (together with Bikini Atol] this is referred to as the northern Marshall Island Multi-Atoll Survey) downwind of the proving grounds prior to termination of the Trust Territory Agreement in 1981. About half of these atolls such as Rongelap and Utirik are inhabited; some have had a minimum of environmental monitoring and others none at all. A radiological survey of the external gamma exposure rates and the terrestrial and marine environments was conducted at these atolls in late 1978 as part of the Northern Marshall Island Survey (NMIS) to assess the concentrations in different components of the environment. The data from this survey are being used to evaluate, in the form of radiological dose assessments, the probable consequenses of living on any of these atolls.