(3)
During the slurry placement the keywall on the north
end of the crater on the exposed reef can be constructed.
It is
estimated that 1/2 of the keywall on the north (seaward) side of the
crater will be anchored 1'-O into firm coral reef and the remaining
1/2 of the key wall will be embedded to a maximum of 8'-O into
factured coral reef and where no reef exists.
The applicable keywall
to use will be determined in the field.
oN
(4)
The amount of contaminated materianay
eee
be known by
*
ae
this time and the configuration of the mound determined.
of
The location
the keywall should be staked out and all surrounding material
within the containment area removed to the elevation of the existing
coral reef located on the north end of Cactus Crater,
(5)
Complete construction of
the enclosing keywall.
(6)
Placement of the contaminated concrete mix above the water
line shall be compacted by vibrator roller and shaped to receive the
concrete cap.
b.
Keywall,
The concrete keywall will be constructed completely
around the encrypted material.
The pace data (reference 7) indicates
(Rev. 16Dec76)