(Monthly Status teport, April, 17951} - 4 - Biology % Jedicine Gt ‘ wonitoring of Air and waintail in cooperation witu the Sivision »of ilitary Application (which is serving as the mai.. 4.0 liaison with tie ational Association of Photoeraghic ‘anufsecturers,, tie dhonsysics Sranch arranged for country-wide moritoring of air and rainfall to measure tue amount of radioactivity over tie United states as a result of the ureenhouse tests. The monitoring procedures were devised to be a3 simple as possible in order to minimize the time and effort recuired for the gurvey. All abnormal observations were to be relayed to tiie Branch immediately, and a summary submitted at the e:d of the test series. Agreeing to cooperate were Hanford Works, Seriele,; Zadiation Laboratory, Atomic Snergy Project at r UCLA, Idaho Test Gite, University of Ltah, Los Alamos Sclentific Labora- tory, argonne Uational cacoratory, Uak tidze ‘ational Laboratory including: a special installation at the Universit, of Florida, Brookhaven HUational waboratory, aid the .ew fork .avoratory, Because of its location close to the largest snoatozrannie industries, the ‘ew York ‘.aboratory has set up an elaborate networs af cooperating isboratoriss including: U. 4. ‘water Sureayn at ot, lLowls, Jucont Laboratories at Carlin, \. d., Jiolo zy and jedicine Instruments lraich in vasuingto:, 3. ve, wastman Acdax and atomic unerzy rro;sect at iociester, 4. Y., angco Laboratories at Sisghanton, ©. Y., “estern seserve University at Cleveland, Uhio, and of course its own staff, fhe major part of tie observed radivactivity is appe-ring over the northeastern nart of the United states, as it did following the jevada tests. Radiolopical Asnects of Undervround “eavon Tests The dlopnaysics Jranch sas been concerned to a large extent in the radiological aspects of tie underground weapon tests wnich are proposed for ti.e continental site. It nas cooperated with representatives from ACGWP in considerin, and extending ecleuiatlons on axpected probleus, and with the Jivision of ‘Llitary application in aaking reconmendationsrelative to such a test.. In view of the Commission's desire to assure itself of the safety of the operation, a prelininarvy test waa agreed upon, and possible sites and conditions nave been explored. On the assumption that awestern site will be selected, tae Granch is studying the nature of observations which will nave to be made in a prelininary shot in order to assure radtolosicsl safety for succeeding test shots. GPO 16—-55741-% OFFICE > DOS ARCHIVES