wat, decontamination. The above-described procedures reduced this to 20 mr/hr, an effectiveness of 92 percent when corrected for decay. In the washdown srea, which included the superstructure, the initial level was 115 mr/hr. Following decontamination the level was 13 mr/hr, an effectiveness of 78 percent when corrected for decay, This is in agree~ ment with results obtained in operation CASTLE which showed decreased decontamination effectiveness following washdown, The working party of 45 men was divided into 5 & 6 man teams and expended a total of approximately 15 working hours in the decontamination of the two ships. CONCLUSICNS It is feasitle to decontaminate a ship by means of the procedures descrited herein, The effectivenesses reported are probebly higher than would be obtained in the removal of a more tenecious contaminant, ope. CONTA aE we ee G - 56 ~

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