13 The use of large quantities of disinfectant
toilet cleaners may destroy the bacteria which are essential to the
operation of aerobic sewage treatment plants. The manufacturers recommendations
should be followed in relation to the type and quantities of cleaners
to be used.
14 All officers and crew should be informed of
the dangers of sewage gases being generated and finding their way
into working and living spaces. There attention should be drawn to
the hazards identified in these guidelines. There should be an operational
procedure on board ship for reporting and recording the inspection
and maintenance of sewage systems and the action taken to deal with
complaints of foul or musty smells which may be due to toxic, flammable
or oxygen-depleted gases.