d, On site assistance was given in an extensive series development tests at the Neval Proving Ground, Dahlgren, Virginia e. Group J-9. Thomas N. White was appointed Alternate Group Leader [for In this capacity he, with members of the H-l Group, made 0 complote stuty of the rad-safety problems of Operation Cretn- ! house. f. Aa a member of the Subsccumittee on Permissible Internd) Dose of the National Committee on Rediation Protectian, Charles Perry attended several committees meetings. The experimental datalon humans, in regard to plutonium, were examined with the assistancelof Wright Langham, and permissible dcee reccmendations vere nade by Charies HK. Perry to the Subccamittee. Tentative permissible levels were submitted for Los Alamos use cf other radioisotopes which ar peculiar to this installation. Consultation wan given to Sandia Hase Operations concerning permissible doses of other radioisotopes. g. This Group assisted in the improvement of the energen vehicle service which is available for the Los Alamos Area, Conpiste procedures have teen vritten. h. Charles H. Perry assisted the University of Utah Medi School as consultant regarding the choice of electronic equipment Por their forthcoming plutonium (etc.) experiments. the He also appraised red-safety probles. C. Develooment Following are seme of the more outstanding problems vhich wre - 12 - o 130915 O16 a lO4¥WUY L ANI.