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Alternatively, a tank may be made safe by being emptied completely
and filled with weak concrete before being sealed over. As a
temporary measure a disused tank can be emptied and filled with
water and sealed. Two tanks were closed down in this way.
Ten new pumps of approved pattern were installed during the
year.
Number of premises licensed to store petroleum spirit
or mixtures 153
Aggregate amount of petroleum spirit and mixtures
stored under licence (in gallons) 358,920
(Calcium carbide 20 £ tons)
Number of visits of inspection made to premises 257
6. INFORMATION BOOKLET. Details of the community
services and the social services provided locally, both by statutory
and voluntary authorities, were collected and compiled into a booklet
which was duplicated in the Department and distributed to those
individuals and organisations within the area who may have need of
the information. The booklet must have been found of value as it
was most cordially accepted and we received in the Department
numerous letters of congratulation and expressions of thanks for
copies.
7. WATER SUPPLY. The piped water supply of the
Borough is accepted largely from the mains of the Colne Valley
Water Company and has remained satisfactory both in quantity and
quality. A very small part of the southern end of the Borough is
supplied by the Rickmansworth and Uxbridge Valley Water Company
and this supply also has been of satisfactory quality and adequate
quantity.
In the last report comment was made on the success achieved
by the Colne Valley Water Co. in reducing, over the years, the hardness
of water supplied to the Borough.
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I have included in this year's
report a table showing the mean hardness figure for the past two
years.