3.2.1 Some solid bulk cargoes are susceptible to oxidation,
which may result in oxygen depletion, emission of toxic gases or fumes and self-heating.
Some cargoes are not liable to oxidize but may emit toxic fumes, particularly when wet.
There are also cargoes which, when wetted, are corrosive to skin, eyes and mucous
membranes or to the ship's structure. When these cargoes are carried, particular
attention shall be given to protection of personnel and the need for special precautions
to be taken prior to loading and after unloading.
3.2.2 Appropriate attention shall be given that cargo
spaces and adjacent spaces may be depleted in oxygen or may contain toxic or
asphyxiating gases, and that an empty cargo space or tank which has remained closed for
some time may have insufficient oxygen to support life.
3.2.3 Many solid bulk cargoes are liable to cause
oxygen depletion in a cargo space or tank. These include, but are
not limited to, most vegetable products and forest products, ferrous
metals, metal sulphide concentrates and coal cargoes.
3.2.4 Prior to entry into an enclosed space aboard a ship,
appropriate procedures shall be followed taking into account the recommendations
developed by the Organization.footnote It is to be noted that, after a cargo space or tank has
been tested and generally found to be safe for entry, small areas may exist where oxygen
is deficient or toxic fumes are still present.
3.2.5 When carrying a solid bulk cargo that is
liable to emit a toxic or flammable gas, and/or cause oxygen depletion
in the cargo space, the appropriate instrument(s) for measuring the
concentration of gas and oxygen in the cargo space shall be provided.
3.2.6 Emergency entry into a cargo space shall
be undertaken only by trained personnel wearing self-contained breathing
apparatus and protective clothing and always under the supervision
of a responsible officer.