l. brogren Five - DOD (US) Ze eroject 5.4b + Carticle size ceesurements (L. bouton) 36 One Phases be io obtain totel activity in the particulute neteriel, rate of fall-out and the fell-out pettern on lend erees of Eniwetok Atoll and to determine the air-borne concentration of the redioactive perticulete reteriel neer ground level over land arees of Lnivetok Atoll, the size distribution of gross snd redioactive perticulete matter, the distribu-~ tion cf activity with particie size, the presence of selected fission preducts in the perticulete matter, the adequecy of ceriel survey v The collection of the necessary semples will be eccorplished by pe ie Both Shots. eted dg de systems in essessing the ground conteminetion situation. secpling eircraft for air semples and the intermittent fall-out Selpler end electrostatic precipitator for ground scmples. «ir seipling will be eccomplished by Project 7.3 using F~84G circreft. The interrdttent fell-out scrmplers will be loceted cn various islands of the etoll: BSogellua, Bogombogo, Ruchi, Bogon, Engebi, Muzin, Kirinien, pokoueereppu, Yeiri, witsu, Kkujoru, Lberiru, wonon, biijiri, hunit, Jepten, Perry, kniwetok, Igurin, Giriinien, higili, Coral head end eb ertificial islend. Llectrostetic precipitctors will be locéted on Lngebi, hoeriru, Biijiri, unit, Jepten, Ferry end Lnivetok. Te Project 5.ib reciizes entry at k hour to begin semcple collection. wzerly collection is required in order to return the sexmples to arny Cuemicel Center with plene scheduled for deperture ct k + 2 deys. Considerable tire will be required in preperetion for this shipment. 32 37