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Maintenance Companies, it was agreed that the ullage test as recommended
by the Home Office should be considered adequate and that
only in special cases would a pressure test with nitrogen be required.
The full effect of these new conditions will not be felt until January,
1960 (when all underground tanks which arc over 20 years of age
will have been satisfactorily tested or will be discontinued as storage
accommodation, and all electrically operated meter pumps will have
to comply with the special conditions relating thereto).
9. INDUSTRIAL EFFLUVIA. The Department is still very
much concerned at the increase of industrial effluvia in various parts
of the Borough. It is not on every occasion that residents in close
proximity to the factories have cause for complaint, but it has been
found that some industrial effluvia diffuse in the atmosphere and
render the odour imperceptible nearby while others give rise to
complaint considerable distances from the point of emission.
Investigation of this type of complaint is often difficult and even after
the source of emission has been ascertained methods of treatment
have to be considered and tried experimentally before a satisfactory
solution to the problem can be found. Sometimes, however, it is
possible that a satisfactory answer to the problem can be given without
extensive investigation and in these cases matters can very quickly
be put right. In some cases, however, considerable physical and
chemical investigation has to be carried out. This is usually done in
collaboration with engineers and chemists employed by the industrial
undertakings involved. At the same time information is gleaned from
various other sources and applied to the problem in hand. Without
exception, it is found that the management of industrial undertakings
arc co-operative and willing to experiment and try out suggested
methods of overcoming effluvia problems, notwithstanding the fact
that it may involve them in quite considerable expense.
Whilst some problems have been solved to the great satisfaction
of all concerned, others are seemingly intractable for the time being,
or at least the methods which have proved successful in one instance
do not appear to be successful in another which seems to be similar
in character. When this happens a fresh approach becomes necessary,
and inevitably results in further delay.
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