_2buried material and burial in the sea or. in the Cactus Crater seems to de logical. Where the OPLAN conditions are inadequate to fully represent the situation, or where it is unclear how the conditions are to be applied, the Advisory Group believes that Situation-specific judgments should be exercised by the DOE technical staff at Enewetak in conjunction with the JTG. Based on our limited information concerning the garden plot and on our visit to it, we are particularly concerned that the garden will. not be able to provide the information needed in a timely manner. The group strongly recommends that the rote of the garden plot as a part of an overall integrated plan for making radiological assessments be carefully evaluated. If the plot has a key role, it should be clearly defined and adequately supported to carry out its mission. This should include consideration of an alternate location in the event logistics problems are insurmountable after the JTG effort is completed. 4. Plowing Experiment A review of preliminary data from the plowing experiment suggests that plowing decreased the potential for resuspension of plutonium Since the. plutonium in the surface soils appeared to be nearly uniformly mixed with all of the plowed soil. Thus, plowing probably would reduce the amount of plutonium that could be inhaled. However, while plowing might reduce the heaith risk -from inhaled plutonium, the possibility remains tnat plowing could increase the availability of 90Sr, 13/cs, 239Pu and @41Am to plant roots. To conment further on plowing, the Advisory Group requires Comparative data on the levels of 20Sr and !3/cs, 239Pu and Z241An in plowed and unplowed soil and on the uptake of these radionuclides in plants grown in the plowed and unplowed soil. Dose assessments for the two conditions could then be obtained and used in determining the benefits of plowing with respect to rehabilitation of the Northern Islands. Comm an a74i 7 OT heliais uowonse decile aD Wives fl hee Ee During the course of several meetings the Group has had the opportunity to refer to data that might be obtained from the | garden plot on Enjebi: During its visit to the atoll in August the group briefly visited the plot. The Group has the impression that the garden has considerable potential for providing information on the relationships between radionuclides in soil and edibie crops. Such information is of paramount importance in making informed recommendations about the future use of the northern islands of Enewetak Atoll] and the return of the Marshallese to these islands. 5 Tree ar et eee ee Tat Seiewe . TT be ee re Pim crete re eke . Breet Sa Enjebi Experimental Garden Plot Te ae a 3.