lives on Rongelap Island. The people odtain mest of their food from Rongelap with occasional supplemental trips to Eniaetok and to other southern islands in the atoll. Lictle or no activities currencly takes place on Naen or Kabelle, or other islands in the north. Figure 2 is a graphic presentation of the measurement points and exposure rates along the main road of Rongelap Island. uniform averaging 7.3 wR/hr over the island. The exposure rate is fairly This is aboue twice che background radiation level of uncontaminated atolls in the Marshall Islands. Tables 7, 8 and 9 present the data for the islands surveyed in the Ucirik Atoll. These islands, Aon, Eorukku and Utirik, the atoll. represent the major islands within aon, located in the southwest corner and Utirik located in the south- east corner of the atoll, are the major areas for living and food production. external exposure rate for all these islands is about 4 The R/hr, i.e., very near the regional background Level. Tables 10, 11, 12 and 13 present the RSS-111 survey results for Wormej and Wotje Islands of Wotje Atoll and for Bigen and Ailuk Islands of Ailuk Atoll. These islands were surveyed to determine whether they were representative of baseline external exposure rates for the Marshall Islands. The individual island averages are found in Table 14, but cange from 3.7 +R/hr to 3.9 —R/hr. These exposure rates are about che same as zhat for Kwajalein and other areas not exposed to gross contamination from fallout; we assumed them to be representative of ambient Dackground tadiation levels for che region. Discussion of Results The average exposure rate as measured for each island is Listed in Table is. In all areas, except for Rongelap Atoll tsland was visited, of a given atoll. and Rongerix Atoll where only En-wetak there is essentially an uniform exposure race within the .slands For nvpothetz:cal innaoiztancs of Eniwetak Island at Rongeri« Atcil,