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2. Circular No. 51/65 - 28th June, 1965
This was a guide to Local Authorities setting out in Appendix I cost limits for
various appliances, while in Appendix II a revised memorandum was given on the
principles for determining what types and standards of works are reasonably necessary
when considering grants for adaptations to fireplaces.
3. The Smoke Control Areas (Authorised Fuel) Regulations 1965 -
No. 1508/1965
These regulations came into force on 1st September, 1965, and listed another
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authorised fuel for the purpose of the Clean Air Act. 1956. This is 'phurnacine
briquettes, which has anthracite as a main constituent, and is manufactured by the
National Coal Board.
4. Circular No. 69/65 - 18th October 1965 - Tall Buildings & Industrial Emissions
This circular drew the attention of Local Planning Authorities to the need to
give especially careful consideration to proposals for the erection of very tall new
buildings in situations where they might be affected by emissions from existing
chimney stacks which serve large industrial installations burning solid or liquid
fuel at a rating of 450,000 lbs of steam per hour. In such situations the upper
parts of the building may in certain circumstances be subjected to undesirable high
peak concentrations of sulphur dioxide. Moreover, the building, by reason of the
down draughts it creates, may interfere with the normal disposal of the plume from
the stack. As a rough guide, it was suggested that both eventualities should be
considered whenever the proposed new building would be more than two-thirds the
height of the existing stack. Local Authorities were recommended to take both
eventualities into account in considering proposals for buildings to be erected by
them and also in considering planning applications from developers.
5. Circular No. 77/65 - 31st December 1965 - Estimates and Final Costs
This circular, revised the procedure and simplified the handling of Smoke
Control Orders and the arrangements for the submission of information regarding the
cost of fireplace adaptations to the Ministry.
Recording of Atmospheric Pollution
As part of the national survey of atmospheric pollution, there were 3 sites in
the Borough where the daily measurement of smoke and sulphur dioxide present in the
atmosphere was determined, using standard apparatus: -
Site 1 - The Treatment Centre, Seven Sisters Road, N. 7
Site 2 - The Health Department, Upper Street, N.1
Site 3 - The Health Centre, Pine Street, E.C.I
Two 8-port valve automatic recorders were installed and eliminated the necessity
for daily replacement of the smoke filter paper and hydrogen peroxide bubbler, by
automatically switching the air intake once every 24 hours to pass through a different
filter and bubbler. This allowed 24-hourly samples to be obtained without attendance at
the site and operated for 8 days. The method proved particularly useful for week-end
and Bank Holiday periods.
On the advice of the Warren Spring Laboratory, the use of the Deposit Gauges and
Lead Peroxide candles was discontinued.
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