NOT TRINEE Pt “eR 4 amgIRIS Steerape Aa+

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SUMMARY OF EXTERNAL GAMMA LEVELS AT RONGELAP AND BIKINI ATOLL
RONGELAP ISLAND =!
Rongelap Islanaé/

End of July 1956.

0.2 - 0.5 mr/hr

ave. = 0.4 mr/hr

Dose rates at time of repatriation should be

< 30 mr/wk

June 1957, 3 ft. above ground (time of repatriation).
Highest

Lowest
Ave.

-

6.13 mr/hr

0.01 mr/hr
0.03 mr/hr

Other Islands

The highest level on any other island at the time of repatriation was

about a factor of twelve higher than Rongelap.

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Bikini Atolls!Bikini Island

August 1964, 3 ft. above ground.

ave. = 0,04 mr/hr

Enyu Island

August 1964, 3 ft. above ground.

ave. = 0.01 mr/hr

Aomen to Yurochi Islands

August 1964, 3 ft. above ground.

ave. = 0.16 mr/hr

(According to the field notes, Station V at the eastern end of Romuk showed
the highest levels found with average values of 2 mr/hr and 0.5 mr/hr gamma

at ground level and at 3 feet and 10 mr/hr and 4.6 mr/hr beta-gamma for the
same conditions.)

Ngou Island

August 1964, 3 ft. above ground
ave, = 0,09 mr/hr

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