.
2 Om airmen apathetRnewstidliven Fe ee a Bein *
and aerial cloud sampling results are used, not because they represent
potential exposures of the population, but
because they are a
conser-
vative upper estimate of potential exposures.
The following tabulations of tritium results are indicative of the
concentrations encountered following a few representative events.
1.
SCROLL
4/23/68
1130 PST
DELETED
Midpoint of
4
Location
_ - Sampling Time
1
ue “
as
”
~
yi A
Aerial Sampling
°
Underground
~Tritium
pCi/ml of —
‘Moisture /
——
1407
Over GZ
8.9 x 10°
1407
Over GZ
2.9 x 10
3
A
pt
pCi/m? -
=,
of Air °
-
3 x 10
Raa eee
;
9.3 x 10
7),
an BT
4
a ar
3
OF
LS
1 RT
vo
“a
:
-
*
3
yo wD
The first sample was taken over a shorter period of time
than the second and thus is averaged over a shorter period
of time.
Normal background levels of 1 - 2 pCi/ml have
been subtracted.
All later references to background values .
for this type of sample will be taken to mean 1-2 pCi/ml of
moisture.
2.
NASH
DOE ARCHIVE
1/19/67
845 PST
DELETED
Underground
(Venting did not start until about 1800 on 1/19/67 and
continued until about 1100 on 1/21/67.)