. . External Radiation Measurements and “Gr~und Truth” for Northern Marshall Islands Regional Radiological Suney project Title: 13. Publications: (--) -“ Greenhouse, N.A. and MiItenberger, R.P. Radiological analyses of Marshall Islands environmental samples from 1974 through 1976. BNL Report 50796 in press. Greenhouse, N.A. and Miltenberger, R.P. External radiation survey and dose predictions for Rongelap, Utirik, Rongerik, Ailuk, and Wotje Atolls. BNL Report 50797 in press. 14. ? Scope: (a) 200 Word Summary: A comprehensive external radiation survey program will be conducted on each of the approximately 13 atolls or islands in the Northern Marshall Islands which could have received tropospheric fallout from U.S. nuclear weapons tests in the Pacific. The surveys will provide “ground truth” data on ambient external gannnaradiation levels on-island. This data will be used as the basis for calibration and normalization of aerial radiological monitoring by E.G.&G. Corporation. The program will include detailed external radiation measurements with pressurization chamber and scintillation survey instruments, and in situ gamma spectrometry on all islands of interest. Surface soil samples will be collected and analyzed for significant gama emitters in order to make decay corrections for long-term dose predictions via the external radiation exposure pathway. BNL field trip staff and analytical lab facilities will be available for other environmental sample collections and analyses as needed by the overall scientific program. 15. Relationship to Other Projects: This program is directly related to our continuing environmental and personnel monitoring efforts under the BNL ?farshall Islands Radiological Safety Program. It will also interact cooperatively with related efforts at the University of Washington (LRE) and Lawrence Livermore Laboratory. * 16. Technical Progress in FY 1978: Personnel and analytical laboratory resources will be mobilized in support of this program. If the regional survey begins on schedule, the first of the three survey legs should be completed by the end of FY 1978. 17. Expected Results in FY 1979: The remaining two survey legs will be completed, data analyzed, and a (See Continuation Sheet) .-..