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22
Water Examination gives details of an experiment conducted between
1952 and 1958 using a 60 foot coil of lead piping. The report states
"These results show that after the pipe had been in use for about two
months, the amount of lead taken up by river-derived water left
standing overnight was considerably reduced, and that after one year,
the amount taken up overnight was reduced to a more or less constant
figure of about 0. 3 mg. /1. However, even with a pipe that has been
installed for several years, it is still advisable to run the stagnant
water to waste first thing in the morning to obtain an entirely leadfree
water. "
The 39th report by the Director points out that some types
of plastic piping contain a proportion of lead and that although the
amount of lead taken up by water from these pipes is less than from
a lead pipe, it is advisable that all plastic pipes should be tested to
measure the amount of lead which is freed before the pipe is put into
use.
No form of contamination of the water supply was found which
required any action by the Council,
All the dwelling-houses in the Borough have a piped supply
direct to the houses and none is supplied by stand-pipes.
Sewerage
All the houses in Hampstead are connected to the main drainage
system, the sewerage passing eventually to the London County
Council's main sewers and to the sewage disposal works outside the
Borough.
The reconstruction works to prevent the possibility of
flooding after heavy storms completed some years ago have proved
satisfactory. No new schemes for sewerage within the Borough are
contemplated at the present time.
London County Council (General Powers) Act, 1955, Section 27
This section is of considerable benefit to the Department
as it cuts out the unreasonable delay often associated with the
service of the usual nuisance notices.