Commander, JTF 7? 22 April 1953 without exceeding the Task Force tolerance limit, and without the ine “ordinate delay betaeen encts that would reeult from unrealistic contan ination liatte,. bh. Navy veesels exposed te “operational” eentamination will be naturally desentaaiaated by radisastive decay and dilution by the open sea so that extensive decontaaination should net be necessary upon thelr return te the Uaited States, 5. Ia eonasidsration of the above and with a view toe eeonomy and minialsation of radiation exposures, it is resoasonded that: a. QJTF 7 estadlieh operational elearanse lisite in eccumied spaces abeard ship that will permit onxiaua working periods within radielegically centaainated waters for vessels under his eontrel. b. The Commander of Task Grow 7.3 ve advised ef these liaita and ef the requirement te eperste in radiclogieally centaainated watere. G. Studies be initiated te determine asthoda of preventing consentretion ef activities in water evaperstere, distribution lines, end aleroorganie grewths on the bettam ef abipe. ACG/JDS/ele Ens. 1. Lagoen Contamination Dartag Operation Castle, J.D. Servis, We? , 7% 7.2 ét¢ 2 res 1953 2. Extreets Health Hazards of Operation Castle, 7.L. Sipma, 1.De, HeDiv., LASL, dtd 6 Maret: 1953 s/iivin C. Graves ¢/ALVIN C. GRAVES Seientifie Deputy JTP=7