410578
Dr. P. KH. Wreko?F, Chief
Atmospheric Ph.sica Laboratory of the
eo-hysics Research “frectornte
Air Force Cemoridce Research Center
8
COMPI
it
Location,
Collection Records Coster C- 2% D-99
wi
Boston, Kassschusetts
Folder (poe aifer Studies
In necordence with the request of Dr, Lester Machta, U. 3,
Westher Bureau. and the inatrvet{one of the Sivieion of Militery
Applications,U. S. Atomic Enercy Commission. I em forvarding ts
you Sum les of detris from seversl bombs of the Operation CASTLE
| #5
‘the debris is canteined on filter paners which vere flows
through the tem) elow@,
Pertinent dete on times and altitudes of
collection are given belov,
In regard to the removal of perticuleate matter from the filter
repvers, members of the Argonne National Laboratory have performed
this operation successfully by shaking the papers with smil steel
balls in scetone. Tetails of this procedure may be odtained from
Ur, Shermen Fried of Argonne.
In regnrd to the perticulete size distribution, studies have
been mde on similur pepers by members of the AFOA al organization.
Tetails and results msy be obtained from Or. Willfar Urry of AFOATel.
Ine level of radionctivity on the papers at this time is in all
eos28 lsss thon 3 milliroentgens per hour et resr contact.
Upon come
pletion of your studies, the filter papers need not be returned to
L:s Alamos; however, certificates of destruction of the asterial should
be furnished to me at your conventence, For your {nforagstion, details
on the nature 9% the debris collected on these papers earry a claseifte
cation of SECRET RES RIC TED DATA, and fsll into the "Weapons Deta™
extegory.
CLASSIFICATION
CANCELLED
loc
WITH DELETIONS
ae!
o BY AUTHORITY OF D
‘COPIED/DOE
LANL RC
-
bever 3}
—
Menr “er, Wreko?f
Series.
-C
ny eet,tePPP a
wasl¥3
gest COPY AVAILABLE
L15 Somme-s Street
BY./ CMe / Dd
BY AUTHORITY
ERET. RD.
TLL:
Sen eeeGvuec
eeehiara,
Je11-126