"1.
.
aie
*«
yo ite ]
The in-plant atmospheric concentration of beryllium at beryllium
operations should not exceed 2 micro-grams per cublo meter es an
average concentration throughout an S-hour day.
"2,
wen though the daily average might be within the limits of
recommendation 1, no personnel should be exposed to a concentra-
tion graater than 25 micro~grama per cubic meter for any period of
tine, how.ver short.
"3.
In the neighborhood of an AEC plant handling beryllium compounds,
the average monthly concentration at the breathing sone level should
not exceed 0.01 micro-gram per cubic neter.*
Results from recent animal experiments at the 4% Project, University ff
Rochester indicate thut beryllium is virtually non-toxie when taken by mouth.
Therefere, no special liquid waste disposal seasures need be employed by
beryllium.
Biephysies Branch Gait”
Hevaca Teote
Or
| Radtologiesal Safety ~ Tha Radiolovical Safety group of Operation
Ranger had the objectives of assuring safety for cpersating personnel, surrounding
population, livestock and water supplies; also of acquiring factual data to
determine wiether the Nevada eite could be utilized ag « permanent preving
ground for operations of certain types. In aidition, members of this group
would play a large pert in acquiring ond diaseminating flrat—hand facta about
nuclear air-bursts asthey apply te civil defange. This group was comprised of
lk people from the Los Alamos ataff (mostly from the Health Division), 9 zen
from the Los Alamos Protective Force, 15 representatives from AEC emergency
monitoring teans ad 6 men from the US Army ingineer Corps.
Blaborate plana enabled these people to monitor the area itself, while 10
of their mobile tenons surveyed practically every possible read going north as
far as Ely, Nevada; east to Cedar Springs, Utah; south to Needles aid Kingman,
Ariazonas and to Baker, California and Tonapah to the southwest and northwest,
respectively. Survey plang for AFOAT-1 mapped out probable areas of radioactive
fallout, and other AFOAT=1 planes followad the radioactive clouds as they
progressed acrosa country. Plans were laid for ervacuzting populations from the
surronunding areas should radiation intensities reach a dangerous level, and
after each shot, air-line schedules were altered through CAB until regular
lanes were safe for travel,
Operation anger was carried out without a sisnificant everexposure to any
operating personnel. In the surrounding areas, almost without exception,
radizntion intensities did not exceed about four tines background intensity,
which waa negligible. On Charleston Peak, approximately 45 miles southeast,
intensities shortly after the fourth and fifth bursts reached values of 3 and
ly milli-roentgens per hour, but dropped in a few hours to 0.7 mr per hour.
A person remaining in this area during either of thuse tests would not have
received zscro than a daily pernissible dose.
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