=. ee 3. At O800-M on 2 March 1954 the ship was completely monitored and the flight deck and bridge structure indicated from one-hundred (100) to*wo_hundred-twenty (220) milli roentgens per hour, gamma only, The hangar deck and rooms on the _ deck below the flight deck indicated from thirty (30)to fifty (50) milli. roentgens per hour, gamma only, Decontamination efforts were conmended immediately after monitoring was completed and were carried on all day 2 March” 1954. The flight deck was washed.<down several times using high pressure hoses, working parallel to the planking. The first wsh-down resulted in an average’ reduction of 40-50 milli roentgens per hour, gamma only, This was followed by scrubbing with a detergent soap solution and salt water rinse, using high pressure fire hoses, The intensity on the flight deck was reduced below fifty (50) milli roentgens per hour, gamma only, except in a few scattered spaces, following repeated applications of this method, The averege beta plus gamma reading on the flight deck before decontamimtion was one (1) rep. The decon- tamination efforts utilized reduced this figure by at least Le according to calculations of the Navy Radiological Decontamination Laboratory representatives, he A check on representative film badges of flight deck and other exposed pers—- onnel indicates that they received an average of from two (2) to three (3) roentgens total dose up to noon 2 March 1954, I consider that as a result of the decontamination measures taken the radiation level has been reduced to the -. point that the ship is entirely safe for continued occupancy by all personnel on board, I recommend that the BAIROKO continue with the operations in progress in 4 preparation for the remainder of the tests. 5- A detailed report of the decontamination operations will be sutmitted at a. later date, EXMET O' BETRNE ENCL (2) TO ENCL (4) | : Z SAYPSRI