The Task Group considers Option IV a-c, by itself, to be unacceptable at this time. Even with the actions and restrictions indicated, exposures would be too high to provide an acceptable margin within the Task Group criteria. This is especially true for children born at about the time of rehabitation. Importation of food from the southern part of the Atoll or other sources is believed to represent an impractical solution to the problem of excessive internal exposure. Use of a layer of clean soil in areas for food production is not known to be effective and may be hard to regulate. Foods produced through experiments to determine the effectiveness of this measure should not be considered for use by people until the results are carefully evaluated. Use of clean soil for subsistence crops may have little effect on levels of radioactivity in domestic animals and coconut crabs, which range over the entire island. Since Option IV a-c is expected to result in population doses near or slightly above the radiation criteria, further dose reduction may possibly be achieved by: d. Removal of 15 em of soil in the subsistence agricultural area of JANET. e. Removal of 15 cm of soil in the commercial agricultural area of JANET. These actions result in a theoretical reduction factor of 3 to 4 for L "cs and 90 5 in the remaining top cm layer of soil - or have roughly the same theoretical effect as waiting 60 years for radioactive decay to take place. Whether food crops would show a similar reduction is uncertain. This action would possibly result in an ultimate finding that doses would be below the criteria but above that expected for people living on the southern islands. -23-