INTRODUCTION This report has been prepared, primarily, to document the radio- logical support furnished by Holmes & Narver, Inc., the AEC Con- tractor, during Operation HARDTACK, Phase I. A secondary function of the report is to provide Rad-Safe information to be used in the planning of possible future operations, The primary mission of the H&N Rad-Safe organization during the Operation was to protect TG 7.5 personnel from unnecessary exposure to radiation, to prevent the spreading of contamination, and to assist TG 7, 1 in providing overall Rad-Safe support.