Gordon HM. Dunning if -2- 29 July 1954 “Three members of YAG 39 and YAG 40 returned film badges reading 13.5, 55 and 135 roentgens. Investigation revealed that the badges had been ww eeeoe left aboard these experimental ships during radioactive fall-out and do not reflect their true exposure. It is to be ncted that the unit encountered badge tampering in three organizations located at Bikini for the longest ae period (TG 7,3 and 7.5). Eleven Task Group 7.4 weather station personnel on Rongerik Atoll received exposures approximating 40 roentgens and one weather reconnaissance pilot received 17 roentgens. These first exposures are considered to be the «et Se ae x highest actual exposures encountered by JTF Seven personnel during Castlea68 ce eB Two members of Task Group 7.5 exceeded twelve roentgens due to extended work in contaminated arees and equioment. One individual accrued his ww om exposure due to the fact that he went to sleep aboard a highly contauinated LCT that wes being transported back to Eniwetok aboard the Belle Grove. This exposure was an avoidable exposure that resulted from the uncontrolled "roll-up" of eauipment from Bikini. The great bulk of Task Force exposures between 6 and 12 roentgens are due_ to the Navy ship decontaminaticn project and the Air Force cloud sampling project. ‘Whether the value of the decontarination project justifies the exposure or rot, I cannot judge, but without these two projects the operation could have easily been completed with exposures of less than 6.0 roentgens. “” anclosed you will find a tatmleticn cf exposures listing numbers of personnel rather tian percentages, a1: I ax. being ordered to the Cormand and General Staff School for a period of 10 months and, before lecving, sould like to express my aprreciation to you enc Tr. Eugher for your complete ccoperétion. After the school I hope tc rebern to be the first radiological safety officer to sar ti.at he nad ne overexposures Curing a test operation, Sincerely yours, mr. oT Ceeing IT (0