32.15.4. When bodies of water
or explosive gases may be
encountered, trial b9reholes should be drilled ahead of the
workings.
32.15.5.
There should be reliable means of communication
between workers inside pipes and
persons outside.
32.15.6.
It should be possible for workers employed
in piping
to reach a safe place quickly in an
emergency.
32.15.7.
Workers installing pipelines should not work beyond
the excavating blade of boring equipment.
32.15.8.
Where boring equipment is used, pipe should be
laid as close as possible to the excavating blade
so that workers
will not be exposed to the danger of collapsing earth.
32.15.9.
Adequate arrangements should be made to
rescue
workers who are in danger and cannot reach
a safe place.