a Purpose: DRAFT Soil Survey The soil samp] ing program was designed to identify the primary radionuclides contributing to the external gamma exposure and to determine the geographical distribution of these radionuclides in the soil on Bikini and Eneu Islands of the Bikini Atoll. Every possible effort was made to integrate this sampling program with previous programs to avoid undue duplication of effort. The actual number of samples and their specific collection sites were a function of (1) the expected activity levels, (2) future home-construction plans, (3) future agricultural plans, and (4) the number and locations of recent soil samples collected by other programs. Methods and Measurements Two types of soil samples were collected for analysis: (1) a 15-cm- deep surface core sample of 60 cm? area, and (2) a profile collection based upon sidewall sampling in a trench in which samples of 100 cm? area were collected at 15-cm depth increments to a total depth of 90 cm. For purposes . of planning the survey, Bikini Island was divided into the north, central, and south sections along the respective second baseline roads. Eneu was divided into the north and south sections divided by the airstrip. The approximate numbers of surface and profile samples collected within these sections are: 9009819