Contents Tmeroduction .........000. eee sere cen cerees ocean Sampling Procedures .......... eee eecesee wo cece eeeeeees sosee Bikind Atoll .. cc cece wees soec cc eeccesccees oe eeae Cee rece rcc nsec cers saree Rongelap Atoll .......... eevee ec ecncccens seecneee eee Utirik Atoll ..... sec wceecee Cee cer cece cece c ete tee teen nc ee een e reser erence Kwajalein and Wocho Atolls ...... oo eee enacaes wae Sample Preparations and Analysis .....ceeseees eee e cece nc aces recon nceees Gamma Spectroscopy ....... ceo eeeercces Perec erence cere cer eres necces eee. Quallty Control .... ccc cece cece seaee ac eeeesceee eee ecnceceas eo. Discussion of Results ....ccccccecscrevesseces eevee sn eceeees eee cceceeare Acknowledgments ... cece ccc cere senses encscenvaree cet eee sccsone . . References ........ ade e cote erence cen eer sence escreess occ c cece cece sawtseces °