A. Employees shall not work in
or adjacent to an excavation site until that work has been approved by the Office of Environmental Health and Safety. The
Office of Environmental Health and Safety will make certain that no conditions exist exposing University employees to injury
from loose rocks, dirt, etc.
B. Employees should determine
whether underground installations, i.e., sewer, electrical lines, etc., will be encountered prior to opening an excavation.
C. The walls of all excavations
5 feet or more in depth, which employees will enter, shall be guarded by a shoring system, sloping of the ground, or other
D. A shoring system will consist
of wood timbers or equivalent with sheathing as needed. The shoring should be properly designed and installed to sustain all
existing and expected loads. Wood sheathing or uprights shall not be less than 2 inches in nominal thickness, except that
3/4 inch thick plywood panels may be used in addition to the 2 inch material as an aid in holding loose material. In lieu
of the above shoring system, the use of properly maintained hydraulic metal jack shoring units with equivalent strength is
E. The sides or walls of an excavation
may be sloped in lieu of a shoring system. The sloping shall be maintained at a 1 horizontal to 1 vertical ratio.
F. Excavation work will at all
times be under the supervision of someone qualified to modify the shoring system or work methods. This person shall examine
the excavation site and improve the shoring or sloping as necessary to ensure the protection of workmen from moving ground.
G. Excavation material shall be
prevented from falling back into the excavation. In no case shall the excavation material be placed closer than 2 feet from
the edge of the excavation.
H. Safe means shall be provided
for workers to enter and leave the excavation area. A standard stairway, ladder, or ramp securely fastened in place is suitable
for this purpose.
I. No excavation shall take place
below the level of the base of an adjacent foundation, retaining wall, or other structure until a supervisor has determined
that such excavation will in no way create a hazard or until adequate safety measures have been taken. If sidewalks are to
be undermined, they shall be supported to carry a minimum live load of 125 pounds per square foot.
Lighted barrier physical protection
shall be provided at all excavations. All wells, pits,
shafts, etc., shall be barricaded
or covered upon completion of exploration and similar
operations. Temporary walls, pits, shafts, etc., shall be backfilled.