-IVSCY ACT MATERIAL REMOVED MEMORANDUM FOR: SUBJECT: 1, CJTF SEVEN Repert on aaa 10 March 1954 Soil and Wator Sampling Mission ae fk 4 In compliance with your oral instructions, tho undorsigned visited Yot4« Erilub, Maloclap, Wotho, Majuro atolls in tho Marshall Islands 5 through 7 March 1954 for the purposo of obtaining oarth and drinking water samples, and of moasu’ ing gamma cay doso ratcs, and also checked tho radiological condition of tho 3.5 ROQUE on its arrival at Majuro 7 March 1554. 2. Tho first four atolls wore visitod by Marshalloso intorprotor Takushi. and tho writcr by mans of an UF-l amphibious aircraft. Majuro was reached by C-47. Erikub might havo beon omittod sinco it was not inhabited, boing proporty of tho Wotjo tribo which goos thoro only occasionally to gather copra. unknown until aftor tho visit. ) (This wa: 3. At cach atoll, oly tho principal inhabitod island was visited, At cac! visitcd island an offort was mado to composo a roprosontativo soil avorago by collocting into a singlo containor sovoral samplos, coach approximtoly ono squar’ foot of arca and one inch depth, sourcos currontly ir uso. AOA S, 4. by Major Wator samplos wore colloctod from tho princirp . Tho gamma dosc ratcs aro avoragos for tho inhabited With rogard to cortain minor discrepancies betwoon the survey methods. us and tho writors it was originally planned to porform ‘tho &m jointly, and when it bocamo advisablo to scparato and survoy difforcnt atolls, ne timo romainod for discussion of dctails ¢f tochniquos, 5. Gamma-ray doso rates on Wotjo and on Erikub aro oach tho avorago of MX-' and AN/PDR-39 avorago rcadings which agreed roasonably woll, Tho MX-5 was ronde: inoperative whon tho rubbor lifo raft was swamped by surf on tho first attompt tr launch from the boach at Erilub, Following tho Wotho survoy, tho PIR-39 dovolopr a toemperaturo—depondent roading of 0.4 - 2 or/hr, so that lator readings in this rango are of very dublous reliability, 6. The following tabulation summarizcs tho atoll survey. Wator Samplo: ATOLL ISLAND DATE TORE SAMPLE NO WOTJE ORMED § Mar 1600 6 ERIKUB ER [KUB S Mar 1715 S is Seil, Wis MR/AHR & SAMPLING 3.5 orfhr, l-boach, Z-midevil® age, l-back village. WE 4 woll plus 4 catch basin. 56 1.5 ofhr. lemid-village, 1 on path to boach. No inhabit ants, no wator supply found,