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Smoke Control Order No. 2 was confirmed during the year, to come into operation
on 1st May, 1961. The first estimate for conversions was received on the 14th June, 1960.
Inspections were substantially completed in Smoke Control Area No. 3, which consists
of 1,073 dwellings, 84 commercial premises, 14 industrial premises and 10 other premises,
in an area of 91 acres.
Acid Smuts from oil.burning chimneys
The emission of acid smuts from a laundry furnace was abated by the erection of a
new chimney, specially designed for the purpose. Emissions were still recorded from
another industrial installation used only in autumn and winter months for space heating.
In spite of the fullest co.operation from the firm concerned in experiments with additives
and varying fluid viscosities, this problem remained unsolved.
Volumetric Method
The daily mean concentration of Smoke and Sulphur Dioxide is measured by volumetric
apparatus in the Public Health Inspector's Office.
The gauge faces west and a main road in a built up area of residential and commercial
premises.
The term "smoke" is used to denote all fine suspended impurity collected by the test
filter and expressed as milligrams per 100 cubic metres.
The term "Sulphur Dioxide " includes all acid producing gases in the air with the
exception of carbon dioxide and is the net acidity of the air calculated as sulphur dioxide
and expressed as parts per 100 million parts of air.