Levels of beta radioactivity of plankton collected from Rongelap Lagoon in 1958. Rongelap I. tf March 1 tt " " ' tion riumber No. '58 day series 1958 ‘Tow 5001 9-16 5003 5004 5005 5023 5022 5021 5019 5027 5026 5020 5024 5025 5006 5028 5029 5030 5031 5032. 5033 5017 5014 5015 " 9-16 " 10-22 " " " " 10-22 10-22 10-22 " 9-16 11-18 " " " " " 10-22 " " 5016 5010 5012 5013 5009 " " " " " " i Kabelle I. March 9 Tow Rongelap I. Aug. 16 ‘Tow tt " tt Ls iw tt "! 1! Lt) tt Hi ia " uM t it 1 iH Aug. 18 it Tow i“ " tt tt tt fl H T t Li Kabelle I. tt * W iB Eniaetok I. : tt Aug. it 21 tt Tows Tow ? it "t tt Ut it tt 13 | Lt rt it i} it w “" u H " i it tt ; m/Phigan Pass gen Pass uth Pass ngelap I. jaetok I ybarbar I. leshiechi I. an I on I abelle [I Aug. 15 YW t Sta. " " ut it it tt rt Aug. 19 " " " First count Month & " " tt " " " tt tt tt " " " tt oe 6- 1 5002 5018 5011 tt " " Second eount uc/kg Month & ash day 1958 ,24 11-20 25 .32 11-21 .33 .O77 11-18 6.8 11-19 3.5 11-19 4.6 " 3.4 " 4.2 " 3.3 11-19 3.7 " 2.6 " 1.6 " 1.1 11-18 .43 11-18 .66 11-21 1.3. 11-21 1.1 .63 . 88 5.7 11-20 .0o21—=O«" .O34 11-21 .33 . 37 .53 .78 H 11-20 " 46 " .057 +" .O77 11-21 .29 " .026 11-20 Third count uc/kg Month & ash day 1958 uc/kg Preservaash tion of plankton alcohol 34 rt oe O iw iate Plate Collec- Pron nMNWWwnw & Collection ONUNRPUFWHHE DPW Locality OO ONAN FWNHeHRAWUEWNHP PR Table 2. 3.8 tT 2.7 i" t " Q .59 dried"fresh tt it nt " ui n 4.0 alcohol u O21 .O19 41 -39 -37 -O19 ll-2l .094 ~14 .026 .O19 "