— All the corrected G-M tube gamma obtained by the survey team are given measurement site along with all other Although data obtained at that site. radiation readings in Table 1 for each total exposure rate some beta plus gamma radiation readings were taken these data were inconsistent and are not reported. Thermoluminescent Dosimeters - A large number of thermoluminescent dosimeters (TLD) were used during the survey. NRDL contributed the majority of these detectors. The predominant type used was a plastic capsule filled with LiF powder and enclosed in styrofoam inside a small plastic box. This type of dosimeter was placed every 100 ft. (measured) along each of the major transects on Bikini and Eneu Islands. Total exposure rate measurements were also made at each site. The dosimeters were left in place approximately ten days. Controls remained aboard ship. Both sets were returned to NRDL for readout after the trip. The results are given in Table I in terms of the net average exposure rate over the time of exposure. em ee There is some question as to whether these dosimeters were shielded adequately from beta radiation. This lack of adequate shielding might partially expiain the slightly higher average exposure rates obtained from these dosimeters at survey sites relative to the other instrumentation at the same sites. NRDL also exposed several low background CaF, :Mn dosimeters at various locations on Bikini and Eneu. These dosimeters and controls were returned to the Naval Research Laboratory in Washington, D. Cc. for readout. Although the metal case surrounding the dosimeter, which is used to flatten the energy response, should eliminate most of the B-ray response, these results also appeared to be slightly higher than results from the other instrumentation. However, the total doses to which these dosimeters were exposed were relatively small and the time between exposure and readout was quite long. This resulted in the necessity of subtracting sizeable background readings. In addition, there was usually only one dosimeter per monitored location and thus only one readout available per site. ee aa