AEC 482/18 concerning the contamination of areas in Ae the vicinity of ground zero, for yields up to 5 megatons; } b, Determined that such information may be published without undue risk to the common defense and security; c, Noted that graphic and tabular data attached as Annex “A™ to Appendix ‘'C'’ (now in FCDA’s hands as received from DOD in classified form) will be declassified and dispatched to the Administrator, FCDA, to implement paragraph a above; d. Noted that use of the information declassified in paragraph a above, in conjunction with unclassified scaling laws, ‘will makeit possible to calculate similar information for weapons of higher yields; e, Noted that a future proposed revision of the Joint AEC-DOD Classification Guide will contain a topic reflecting this declassification action; f{, Noted that the Administrator, FCDA, will be informed on this action by letter such as that in Appendix ''D’’ to AEC 482/18; and g. Noted that the MLC, JCAE and the GAC will be advised of this action by appropriate letter, Mr, Strauss suggested that the OCB be informed of this action, 8. AEC 637/4 - Policy on Service Irradiation of Gems Mr. Fields pointed out that this recommendation would reverse the interim policy the Commission had established on April 19, 1953, prohibiting the irradiation of gems in the Commission facilities, After discussion the paper was deferred until the first meeting in September, ~ 621 - (A Mf 5° ‘al Ant | 4

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