Introduction This tech note has been prepared to describe the investigatory phase of choosing three possible sites in which to conduct a series of plowing experiments. The purpose of such plowing experimentsis "to evaluate the effectiveness of plowing in dose reduction for food gathering, agricultural and potential residence islands", on Enewetak Atoll in the Marshall Islands. From this preliminary investigation and the professional judgements of Drs. Chester Francis (ORNL) and Raleigh Jones (University of Hawaii), the plan is to define: 1. Test plot location(s). 2. Pre and post plowing data requirements. 3. Any other factors deemed necessary to fully evaluate resultant effect on dose pathways. In this preliminary investigation the following assumptions were made to limit the scope of any plowing experiments to the equipmentand resources available on Atoll: 1. It is desirable to ascertain the effects of plowing soil known to have surface contamination only. 2. It is desirable to ascertain the effects of plowing soil when contamination is known to exist below the surface. 3. Experiments should be performed in areas where concentration levels (TRU, 1387Cs, ete.) match those expected to be considered for plowing. 4. The island of Janet should be considered first, since it is the island most likely to be considered for plowing as a means of reducing the surface concentrations of radioactivity. Three plots were chosen in case the desired characteristics (such as soil profile or radionuclide content) were not met in one of the plots. It is anticipated that only one or two plots will actually be plowed for evaluation. A plowing planning meeting was held on 11 May 1978 in the DOE office trailer at Enewetak. Attendees (three military and four DOE)are listed in the minutes of that meeting, attached to this note as Annex A. During that meeting it was concluded the minimum area to be plowed should be 60 x 110 meters enclosing (in the center of the area to be plowed) a 2 x 4 set of stakes on a 25 meter grid. Locations and Methods of Sampling/ Analysis The three 25m x 75m areas (including eight stake locations on a 25m grid) selected are shown on the Janet map in Figure B-9-1. The areas or plots are designated on the map as Plow X-1, X-2 and X-3. In addition to these three rectangular areas, other identifying features are shown: the north-south and east-west baselines (dashed lines) for the island grid system; the three ground zero locations; the LLL farm and housing trailer; and the runway and perimeter roads. B-9-4