investigation of the radiological con-
Drilled on 7/15/74 to a depth of 10 m
ditions, both from the standpoint of
and cased to total depth.
present distributions as well as
- 2.0 m AMSL.
Elevation
future clean-up efforts, three wells
were drilled for groundwater studies
XRU-1
and five EXPOE wells were set with
Located about 65 m due east fror
slotted casing and made available for
the center of Cactus crater.
sampling.
from 3/6/74 to 3/14/74 to a depth of
The wells are concentrated
Drilled
in the sparsely vegetated area im-
53 m and cased to total depth.
mediately south of Cactus crater,
Elevation - 3.05 m AMSL(S).
but one well was drilled about onethird the length of the island from
XRU-2a
Cactus near a suspected Pu burial
Located about 115 m from the center
site.
of Cactus crater along a line running
east of southeast.
ARU-1
Drilled from
3/8/74 to 3/14/74 to a depth of 50 m
This is the well drilled near the
suspected Pu burial site.
and cased to total depth.
It is
tlevation
-~ 2.34 m AMSL(S).
about 925 m SE from the center of
Cactus crater, about 25 m SW of the
XRU-3
road and 50 m NE of the lagoon beach.
Located on essentially the same
Vegetation is very sparse.
The well
ESE bearing from the center of Cactus
was drilled on 3/6/75 to a depth of
crater as XRU-2a at a distance of
10 m and cased to total depth.
about 190 m from the center of the
Elevation - 2.2 m AMSL(S).
crater.
Drilled from 3/14/74 to
3/21/74 to a depth of 73 m and cased to
ARU- 2
total depth.
Elevation - 2.68 m AMSL(S).
Located about 125 m from the center
of Cactus crater along a line running
just east of south.
Drilled on 3/7/74
XRU-5
Located about 60 m from the center
to a depth of 11 m and cased to total
of Cactus crater along a line running
depth.
west of south.
Elevation - 2.2 m AMSL(S).
This well is just off
the crater lip, about 65 m inland
ARU-3
Located about
from the edge of the lagoon.
115 m from the center
Drilled
from 3/21/74 to 3/27/74 to a depth
of Cactus crater along a line running
of 52 m and cased to total depth.
midway between east and southeast.
Elevation - 1.83 m AMSL(S).
-13-