Se mga + we Madea om ae “ ney we et 1)Tt woe te se ete ae mee? + MT ae mee : lee vane coe . 8 Fhe oh 0 ©) br women OMEN Sa memento tt mae oo Ot on aeRO ee maw TE Tm Rae me wee ee es SanitFda”asda peas I,Se and sLL Gi L, PAELIMINARY LEwAIKS: Following the general conference at Kwajclein on 20 April, there wos an infsrzal conference tetween resresentitives of the Survey Teas and Or, Jorn reghers Mr, Merrglt Bisentus, anc COR Cronmxite and other members of Project 4.2, on the probdban of sanaling the Rongelan fed and water supal;; and the soil “Mr; J. Toftn (wershall District antnropclorist supplicd a detailed list of food materfals, with the relztive Snportance of each indicated, After considerzble discussien of sampling ne$nods, St a. rain reascns? Unlesa the ractaticr dese rate on Rongelap should be fcund to be far less than that expected from corior surrevs, there would be no possibility of returning the natives +o their bd, hezes for many menths, a Current findings an contamination of the {ced sursly, although ef considerable inherent value, would ce of little usa in predicting PB. state of the food supoly at some distant future date when the people night retum, It was therefore decided thet the emchasis in the Asng2izg survey would te on external radiiaticn neasurenents ani cn deccnteminaticn oreblens; thet althcush food, water and 2arth ss22p- 2s would be collected as cernitted ty other work, no special effort would de made to sbtrin analyses of these Samples as ’s basis for any Senciuaiens of th. report. at this time the Services of Lt, Willisn Chapman, USI, were ovferad by Project 4.1 fcr the callecticn of {sed and scil sanples for interdsted agencies, 2, MSTECCS: Geena radizstion dose rat eScxent where ¢therwise specified, were rade with one or nore AN/POR-39 “nstruments 2¢ about tnree Feet abeve ground level, Three such instruments vere taken =m the gxpeciticn, and they gave reedings in gocd agreement with me ancther, where contact readings are specified, the tctrts= of the instmiment «zs pleased in contact with tre surface in question, The results of the anslysis of the food are only quzlitative, The technique used in deterzining tho radicactiva eamtant sf the vardsus Dood stuffs “would de sensitive wairly 29 mareece| somntazination, of beta activity was nit oyeaneeed Precisa Self absorcticn reasurcments using nore sensitive techniques will te made by NROL on N¥iec, The technique used should detect contaninesicn livals io acorcximnately 2¢ CFM (LX 10-5 uc) cn the surface | of sazples, however. The specifics activity of the water semrles wes 26tained oy pyarersiang to crumess sme aillilicer of aach of the samples in a gliss ccua an determining the activity in the resulting sacple using 2 =! “4 Berm? scaler, Siamtn-2lC -2s used 25 the atandar? + . ‘2 per ailliiiter, The specifics azvivity of the fy indicate vaiues thas ar2 roughly 1C,CfO + ne 10-7 uc/ai beva activity established oy t =f + be pestponed for the follcwing ee appezred to be generally agreed trat decisiens on this canplex orsblea aignt 1 MET Rae katPEE OE ye everey CSW ee SIT Nk wee epee Pa.