é ERNEST ORLANDO LAWRENCE BERKELEY NATIONAL LABORATORY ARZHIVES AND RECORDS OFFICE PROVENANCE, STAMP Arcession Numer: File Code Numhir: x £2 -3 -3 Division/Depar [fe : &PPE OES L. Oo F 2] . te Series Title: SepreIs PLERD oF LK: Eupjiedeu s . Box Number: RADIATION STANDARDS, INCLUDING FALLOUT have been included. 225 Some infant and aduit diet samples have aleo deen tested. Each sample is a composite of threes full meals a day, plus snaoks, for & total of seven or fourteen days. Thus aach contains literally a hundred or more individual foods, purchased in local retail markets and cooked in local waters, in the proportions in which they are normally eaten. These samples “nates 1 aah se are prepared for us in the varloua citiea by home eoonomiats, who have perforued yeoman service for these studies. RADIOTSOTOPES STUDIED Strontium-90 has been the major fallout component which has been determined in all of the atudies, but the samples have been explorad for ather radioisotopes as wall, In the January 1961 study we determined eight radio- esRRSH RAT aSBIGait ne,Eseitieap Rt sea ks. iesotopes (strontium-90, oaaium-137, ocerium-144, zinc 65, plutonium-139, radium-226, potassium-40, and lead-210} five of which are man-made, the other three naturally-oceurring. of these radioisotopes, In the May and June 196% series wa determined six In our present series we are measuring strontiun-89, etrontium-90, and cesium-137; we also looked for iodine-131 in saveral samples. ‘Ye have also determined oaloium in all of these studies. In moet of these studies we have aleo tested the milk and wheat componanta ef the total diet samples. The object of these side studies haa been two- fold: to determine the contribution of these foods to the total intake of fallout, and to determine whether either of these foods, tested alone, can de, used as an index of the total intake. Our present study includes a study of total diet eamplea, both tean-ags and infant, at four times during the first siz months of this year, in 4 total of 30 cities, The study also inoludes samples of milk and wheat products. The majer purpose is to determine the patterns of distribution in our foods PARTIAL DOCUMENT voryneene