contribution oF tne exposure in transit as compared to the exoosure auring the placement period, wide fluctuations in net exposure as measured by eacn of tne three dosimeters at each location were noticed. However, a regression analysis was performed comparing Survey meter readings to the rean TLD results at eacn location. The linear relationship between the two was described by: TLO = -1.5 + 0.8 (survey meter) The correlation coefficient was 0.94 and the average error associated with the replicate TLD measurements was 35%. Throughout this report survey meter readings as obtained in the field have been used. If it is assumed that the mean TLD value for each station is a more accurate representation of the exposure rate, then a further element of conservatism has been added to the external dose estimates which are based on survey meter readings. AIR SAMPLING RESULTS During May-June 1970 a joint AEC-U. of W.-WERL follow-un survev was conducted on Bikini and Eneu. The purpose of this survey was to deter- mine the amounts of *329Pu in the soil and air. WERL was responsible for the air sampling program. The air sampler chosen for this effort was the Model 102 developed and used by Reynolds Electrical and Engineering Company at the AEC's Nevada Test Site. [It was felt that the Model 102, which was designed for rugged outdoor use under extreme weather conditions, was well-suited for the Bikini operation. The sampler consisted of a constant-volume pump, belt- driven by a gasoline powered engine. The only adjustments necessary were to the carburetor for sea-level operation. All samplers were re-calibrated for flow-rate at Bikini and the calibration was checked frequently during the operation. Four samplers were placed on Eneu, Figure 21, and five samplers on Bikini, Figure 22. Bikini No. 5 and Eneu No. 1 are considered to be background stations since they were located on the windward side of the respective istands, overlooking the beach. Air filters were exchanged every 24 hours for a period of 18 days on Eneu and 14 days on Bikini. Sm 5005050 37 Tables 7 and 8