2. Produce surface (1 meter) exposure rate measurements which could be correlated with the aerial radiation survey data. 3- Develop general, representative exposure rate values for the entire Atoll, correlating: 4, ae Aerial measurements. b. Surface instrument measurements. c. TLD measurements. ad. Soil concentration data. Identify "hot spots" and other radiological anomalies for further examination. At the initiation of the field effort of the survey in October 1972, it was planned to make terrestrial radiation exposure rate measurements on 50 to 100-foot rectangular grids, covering each island in detail. After the first island was surveyed, the dense vegetation encountered persuaded the teams to drop the 50-foot grid attempt, adopting, instead, a 100-foot grid, unless specific indications made finer surveys prudent. Shortly thereafter, Typhoon OLGA forced postponement of the soils/radiation survey until January 1973. During the interim, an aerial radiation survey was performed by EG&G (November 1972). The resulting data were considered sufficient to warrant a significant modification of the terrestrial radiation survey effort. It was determined that gamma exposure rates taken by portable instruments at the same locations at which the soils samples were collected would be sufficiently representative of the area exposure rates to correlate data fromthe aerial survey, the soils and TLD programs. This concept was executed throughout the remaining portable instrument survey activities, being modified only at hot spots, etc., where some more detailed determination of exposure