Table 4, 259,-40py, “J9pu and -*'am in Surface Soil Samples Collected ac Sikini Atoll in 1972, activitics in pCi/z + 1-,” Location 239, 240," Soaes Loe tS 3h Be 3.> 2.3 teed we LS.i cU.- 3.9 0.3 4.3 1.42 3.87 3.51 5.05 2.75 Te Islesu, o:seatoKutonu 233, 24 239,240,238, 7.0 +0,30 239, 26057 St 3.17 3.31 Isl-30, Bokoaetokutoku 22.2 +0.5 6.7 +0.2 Bors chororvrecn, Tst-31 16.4 72.9 7,2 +0.3 13.9 +1,1 14,0 +0.4 85.7 1.68 Pisonia Grove Namu, 200 yds SW of bunker 20.1 20.3 24.0 +0,1 00.28+0.02 Namu, top of bunier center 22.9 70.7 0.3140.04 15.0 +0.05 73.9 1.57 17.4 +2.5 N.57+0, 11 10,9 0.5 410.5 1.38 Bikini, Row 24 center BL co 3.3 +0.1 0.45+0.04 2.2 +0.3 Bikini, N corner of ctr. BL 3,41+0.36 Bik:-:, Row 34 center BL to 3,0 +0.2 0,06+0,04 2.5 +0.2 0.0740.04 Nami, west end + 150 vds 300 yds E of west tip of island Nom ‘AN vds E of Sunker, co. .ie of asland lsc 3LN and Lagoon Beach Rd, “Lee 3L Bikini, Row 38 2nd BLN to Lagoon Beach Rd. Bikini, Row 25 or 26 sandpile sample, 100 yds $ of 2nd BLN 0.50+0.05 0.24°0.02 N.R.* N.S.5 11.0 -0.7 83.3 1.76 7.33 1.50 -- 4.01 2.1 +0.2 50,0 1.42 1.2 +0.2 35.7 2.08 - -- -- 3.27 -8740,12 Bikini, Row 34 cer BL to 10.3 +0.04 N.R. 3.3 +0.3 -- Bikini, Row 24 cer BL- to 13.2 +0.3 NLR. 8.4 +055 -- 9.3 +0.4 0.3940.07 4.1 +0,2 23.8 tow 34, Ist BLS ro LLLE 40.4 9 .794°,02 $3 40.4 128.¢ 2.18 Bikini, Row 24, lst BLN to 7.8 +0.2 0. 20+0.03 3.5 +0.3 39.0 2.23 Eneman, NW end of island 500-700 mR/hr area Eneman, 500-700 aR/hr area 209.2 +9.0 97.6 4.3 24.0 +1,5 2.14 360.9 +5.9 174,3 +2.8 45.0 +1.0 2,07 [st 8LS Ilse BLS Bikini, Row 24, lst BLN to Lagoon Beach Rd. pte énu JLS 2nd 3LN * poingle sample error values are one-sigma, propagated, counting errors. 3NeR. ‘Not resolved by alpha spectroscony. N.S. : ; 1.58 2.27 8.57 8.05 See ref. 29. Not significance. As a result, some of the dietary items likely to have the higher radionuclides content, e.g. pandanus and breadfruit, are not actual problems to date, They may or may not be of concern in the fucure as the plantings mature and the fruic becomes available in quantity. Thus, the diets of people living in chuse two i- ‘3s are expectsd to ctharte iver the cocing vears refleccing che celinive irfivercces of txporsed and lociily grown food icems. Allowance has veen made for this in development of radiacion dose estimates. Experimental studies at Enewetak may yield techniques co interrupt or break the recycling of radionuclides through the vegetation, soil, and ground water systems, and thereby reduce the radioactivity content of some importance dietary items. All of the aforementioned factors will necessitate continuing monitoring of the diet for many years. Periodic sampling and analvsis of soil and ground water will be necessary in order to establish trends in the changes of radioactivity content of these media, In the northern Marshalls, drinking water is obtained primarily from rain water catchments, While the tadionuclide content of collected rain water will not be zero, this source is not expected co contribute significantly to the radiation exposure picture for future Bikini, Enewetak, and Rongelap Atoll residences. However, rain water which drains from the windward side of building rooftops may provide useful data on resuspension of radioactivity in the soil. The collection of rain water by future Bikini and Enewetak residents is being facilicated by including gutters and water storage tanks in plans for houses and community structures. Some of the larger islands have fresh ground water located only a few feet below the surface. Analysis of this water for its radionuclide content has been Limited to date and the capacity of this resource t serve the needs of island residents is noc well defined. More study of this water is being supported by ERDA, Personnel Monitoring Dose predictions for S8ikini and Eneweceak Atoll residents derived from environmental data have been deliberately conservative, and establish probable upper iimics on doses to be expected for individuals.