SUBJECT: Radicsogical Survey of = .. Contaminated by BRAVO that one survey meter could not be properly zoro adjusted. The four rem AN/PDR-39, still operated cfficiantly and scomed to be in good working or¢ Onc (1) cach Bockman MX-5, and one (1) cach AN/PDR-27A was brougt ior any low intonsity checks nocessary. Two (2) cach calibratcd AN/PDR-T! on hand to scrvo as spares in the ovont of operational failuro with the N None of those instrummts woro roquircd. & Tho avoragc and maximum gamma dogo rates measurod on tho various of cach atoll arc plottcd in Figurcs 1 through 5, All masuroments woro o waist hoight unless othorwiso indicatcd, Tho mximum roadings do not inc] measurcments made with the instrument noxt to a contaminated surfaco. Detailed surveys were made of all the inhabitcd localitics, Typ! readings are givon in Tablos 1 and 2 for the nativo villago of Rongclap I: and the TG 7.4 camp on Mniwctak Island. ‘In gcncral, the villages and the appearcd te have slightly lowcr avcrago dose ratcs than the romaindcr of 1 island. This can perhaps be ascribed to difforcnt gcomctry of the contami and to slightly grcatcr penotration into the looso gravol in the nativo v: The dose ratcs inside the nativo huts appoared to bo almost the same as tt rate outside. The dose ratc in the middlo of the military barracks, tnt: shacks was 1/3 to 1/2 that outsidc, This reduction is probably largely a effect. The dose rate foll off rapidly on the beach bclow the high tide Thero was no cvidence of rain washing off thc contaminatcd mtcrial. The on the windward sides of thc islands appcared to be slightly above avcrag: tamination. TABLE 1 TYPIC..L READINGS IN RONGEL\P VILLAGE - 8 MARCH Location Dosc_Rate_(mr/nr) Rongelap Island (average) Center of village 375 280 Near contral cistern Near southern cistcrn 300 220 Near northern cistorn 350 TABLE 2 Sr, WOUIS PAC TYPICAL READINGS IN CAMP ON ENTWETAK Is. - 10 MARCH Location Eniwetak Island (average) Mess hall Tent, cdge of main camp Latrinc Slecping quarters Outside Dose Inside Dose (mr/hr) Ratc_(mr/hr) 280 220 270 -110 175 “" 260 260 Dispensary 220 3 . 160 90 110