OPERATION HARDTACK I -
DATE:
TIME:
PPG Time
6 Aug 1998
i15
Quince
GMT
Sponsor:
6 Aug 1958
0215
SITE:
UCRL - DOD
PPG - Eniwetok - Yvonne
11° 33’
162° 21'
15"
ok"
Site elevation:
HEIGHE OF BURST:
N
&
Sea level
3 rt
TYPE OF BURST AND PLACEMENT:
Surface burst rrom platform
CLOUD TOP HEIGHT:
1,500 ft MSL
CLOUD BOTTOM HeIGHT: NM
on coral soil
REMARKS:
Only alpha contamination resulted from this detonation.
Surface
alpha monitoring was conducted throughout the area on D and Dtl day
with PAC-3G gas-flow proportional alpha counters.
The readings
were taken in counts per minute, corrected for the probe area,
and multiplied by the appropriate shielding factors to compensate
for the roughness of the surface monitored.
The two isoconcentration
lines shown are the most significant ones, since 3,500 pe/m®
is
the chronic hazard limit and any concentration in excess of 1,000 ue/m?
requires decontamination.
It is interesting to note that in the great
majority of cases the alpha concentrations in the downwind area were
higher on Dtl than on D day.
308