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In six cases higher chimneys were recommended and in 10
instances chimney heights were found to be adequate and
received our approval
Advice was given in 14 other instances of chimneys to be
erected outside the scope of the Act, such as shops, office blocks
and schools. In general our requirements regarding shops and
office blocks were met without much difficulty but in the case
of schools the proposed chimneys were usually at a height
substantially lower than that recommended by the official Ministry
memorandum on this subject, mainly due to the financial limits
imposed in the construction of a school by the appropriate
Ministry.
This is a most unfortunate state of affairs and it would be
helpful if the existing legislation could be amended so that
chimneys of all boiler plants exceeding 650 lbs/steam/hour are
included.
In the following graph the average levels of pollution by
smoke and sulphur dioxide as recorded at No.3 station sited in
South Street, Romford, is reproduced for information. Although
this graph is for the period April to March 1965 these are the
latest figures available from Warren Spring Laboratory who, on
receipt of local figures, have to carry out considerable research
on them so as to make them applicable for national comparison.
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