f. Provide for radiological safety of TG 7.1 and 7.5 personnel in periods between operations. g. ~ Formulate and operate a comprehensive security program to cover AEC interest during non-operational periods, and during operations to provide at the proving grounds security servicing for AEC, AEC contractor components, and TG 7.1, in coordination with the staff of JIF SEVEN and AEC Washington. PART 2. ORGANIZATION AND COMMAND RELATIONSHIPS For the operational period beginning 15 December 1953, and ending 2 June 1954, the Commander, Joint Task Force SEVEN was designated as Senior Atomic Energy Commission representative at the Pacific Proving Grounds with full authority to act for the Commission in all matters which concerned the successful execution of OPERATION CASTLE. Direct AEC participation in OPERATION CASTLE was represented by Task Group 7.1 which had responsibility for developing, preparing and executing the scientific program and by Task Group 7.5, which had re- sponsibility for providing base facilities, performing necessary construction, supporting the Scientific Task Force with personnel, equipment and material, and administering AEC interests in the Operation and in the Pacific Proving Grounds. Task Group 7.5 was formally activated on 4 March 1953, with Mr. James E. Reeves of the Santa Fe Operations Office, AEC, designated as Commander. TG 7.5 was a composite orgenization, personnel being assigned from various offices and divisions of the Sante Fe Operations Office. -2- Pa ie inodie wet = In