CONTENTS Page Chapter 1--SUMMARY AND CONC™USIONS 1.1 The Containmnt Structure 1.2 Related Issues Nature of the Problen Safety of Operators Cactus Crater Filling of the Crater 0 References Chapter 4-~DESCRIPTION OF THE CONTAINMENT STRUCTURE 4.1 General Observations 4.2 The Drilling Program 4.3 Radioactive Contents 4.4 References iii GER EEE Sou ww Location of the Contamination al on we io CLEANUP Cleanup Proposals Cleanup Criteria Disposal Options Radioactive Contaminants Moola uw Chapter 3-—THE 3.1 3.2 3.3 3.4 RA an Ww wi Ww Chapter 2-—-BACKGROUND 2.1 Nature of the Islands 2 Normal Econor.y 3 Enewetak Atoll «4 The Enewetak People -5 Weapons Testing 6 References vil noe COMMITTEE ON EVALUATION OF ENEWETAK RADIOACTIVITYCONTAINMENT ADVISORY BOARD ON THE BUILT ENVIRONMENT PREFACE