Aperehonsion of Long Rango Contanination of Japan anc. its
Fishine Grouncs

Japencec aporchensions over the possibility of long range
raCiolo;ical contaminetion worc very siniler to those we cn~
countcroc in the United. Stetos sas a result of NPG opor>tione,

A cAfforenee in Jypan is cuc to the fect th=t nono, if any, of
the counting oquipment is calibreted, GK tubos are uscd without shiclis,
and undor con2itions whoro tho background count is apt to bo highly verinblo,
This, couzlec with the fact that they co not kmow the background activitice
of such things as soil anc bioclosic:l natorials, mekes it very difficult
to ovaluste the reports, Mrny of the reports cf "ash" fallin-: in various
parte of Japan are uncoubtcdly cust or scot falls that occur normally in
any industriel aroa from time to tino, Roputeble scicntists have examined
B°Oples of potassiuc-rich soil anc heve reported their data ig «rose

counts without any reforcnec to normal soil backzrounc. For this roason
I fine it very Cifficult to teke scrious tho frequent public report of

50 to 100 counts por minute for the unspecificc size of samples, reportcc
from tine to tic,
At my conference with tho Japan scicntists anc government officials
on Merch 22, I explained tho yroccéurce we use in the Statos for
mnosauring fallout, [I urgec them to use siniler ;rocecures fa the
seke of uniformity and offorec to loan them the cquivnent we usec, Thoy
scomcc ocagcr to accopt anc I roquostcd 4 sote cf cquipmcent which has
Bince errived from the States, However, since the arrival of this
oguiznnent, I have acleyea csiving it to tho Janancse because in their
preeont state of mind littla scoc could come of it, I ¢o believe,
howovor, tant when the oresont confusion subsifcs, it will be uscful
for the Japencso to maintain a fell out monitoring notwork and I think
we shoule cooperate with them to the fullost extent,
In a conference with Dr, Koveyoshi on March 26, I informec hin of
my conversation with Dr. Bugher and hie offer in behalf of the Atomic

Enorzy Commission to provice financial suoport for marine biological
studics circctcd at the long rang: contamination of the Pacific,

Or,

Kotayosni, through his interprotor, cxprcesec his appreciation for this

offexezr but aie not pursue the mettor further and hee not asproachod
me sinco,

With rogara to fallout on the Jnp=nose islancs thumsclves, it ie to

De rononberod that the position of these islancs in rolation to possivdlc
sites of weapons testing ie such thst tho Russian tessing vrogram is apt
to produce more fallout then cvonts in tho Marshalls or Nevada,
Egtinatine the Whole Body Dogo

I coudt that it will be possible to make © satisfactory estinate of

cither the Bota or Gamme doso the fishormen reccivec, We know that the
ash foll in such quantities that thu dcck of tho ship became white, anc

there was sufficiont matorial to develop visible footprints,

Unfortunately,

this is tho linit of our informtion on how much ash foll and how lons
it romaine? on the ship, Tho fiskernon wesho.. tho cecks in ordor to rcmove
the ash and sccordine to their roports thoir wnshin: waa offectivo, wWhon

the vessol arrivec in Ya

much of what rcmainc’ was romoved,

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