Mr. Joe Deal D. January 5, 1979 - 2 - The present available data base is inadequate to permit a final dose assessment for !37Cs and 9°Sr for Enewetak Atoll’ after clean-up. E. We are still uncertain as to what is completely necessary for final verification and certification of clean-up at Enewetak Atoll. Will the assessment have to include Runit Island, islands Alice through Daisy and will it have to include tne transuranics as well as !3/Cs and 29Sr? If additional radiological data are required for these islands and for the transuranics then a sampling, analytical and assessment program greater than described herein will have to be considered. In view of the fact that the entire radiological portion of the clean-up project has been directed toward the transuranic radionuclides little effort has been directed toward developing a data base wnich would be adequate for making the final evaluation of the !?’Cs, 79Sr Situation in the northern atoll. As a result, a considerable effort is now required between January and the wind-down of the DOE support of the clean-up activities (which is now scheduled for June of 1979} in order ' to develop a data base upon which we can, with some confiuence, make a final assessment of the northern part of Enewetak Atoll. A more critical situation is to develop an adequate data base for Engebi Island in time to meet the May commitment, which you discussed at the December Enewetak Meeting, for providing as assessment of that key residence island. As a result of the urgency of the situation, Yic Noshkin and I met with the NVOO people on December 19 and 20 to evaluate the current situation and outline a sampling and analytical program that would, in the short time available, provide a data base for final assessment. In order to meet the commitments made at Enewetak on December 1 thru 6 the following will be necessary and adequate support must be directed from HQ to meet the goals: 1. A. Priority 1 is Engebi Island. This is the largest island, the major residence island and the island that the people would prefer to use. The sampling and analytical program will be directed toward this island first. Sampling will be on a 50 m grid which will generate 325 sampling sites. This density of sampling is required because of the history. of events on Engebi Island resulting in a very inhomogeneous distribution of radionuclides and the recent soil removal activities. In addition, we have received no direction from HQ as to what is really required from their point of view for final assessment for verification of clean-up. It was mentioned in our December 13 meeting that perhaps the final assessnent should be done on a scale as small] as an individual Wato. I feel that this is unrealistic and unlikely, but to insure