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tanks have a total capacity of 24,000 gallons. At the centre of the
length of these tanks scum boards are fixed, the bottom edges of
which are at a distance of 24-ins. below the level, the upper edges
being above the water level; the outlet end of the tanks have also
scum boards projecting to a distance of 12-ins. below the water level,
and the top edges of same, of course being above the water level.
The Sewage passes under these boards and over a lip in a con
tinuous stream into a carrier. Up to this point the description
applies to the existing Works, but as extensive alterations are now
being made at the Works, the following will apply when the Works are
•complete.
Four new Precipitation Tanks of 600,000 gallons capacity are
being constructed with the necessary apparatus in connection therewith.
The tanks are arranged so that they may be used on the
intermittent or continuous principle.
The effluent from the Precipitation Tanks will then pass through
about | acres of first Contact Beds. The feature of the new Works
is the ample provision made for the effectual aeration of the whole
system.
A new storm water sewer has been laid down from Western
Road, across the Recreation Ground and along Regina Road and
Norwood Road to Norwood Green, which has had the beneficial
effect of lowering the level of the sub soil water, and should be of
great benefit to the occupiers of houses erected in that part of the
District—from a health point of view.
The lower outfall takes the sewage from one Institution only,
viz., Hanwell Asylum, and discharges into two covered tanks, the
combined capacity of which is about 57,000 gallons. The Sewage
from these tanks is pumped up through a rising main and discharges
into a well at the liming house before mentioned, and then passes
through the same process as the District Sewage. The precipitated
sludge passes into a sludge well near the low level tanks, and is
pressed into cake form by means of a filter press.
The whole of the machinery at the works is driven by gas engines,
the gas being supplied from a Dowson gas generating plant.
Factory and Worshops Act, 1901.
The total number of Workshops in the District as per the
Register is 26, including 10 Retail Bakehouses, 4 Laundries, and
12 other Workshops. The total number of visits of inspection made
during 1902 by the Medical Officer of Health was 26, and by the
Sanitary Inspector 70.
The chief Workshop industries (as distinguished from Factories) in
the District are carpenters, joiners, plumbers, and boot repairing, &c.
The Sanitary conveniences of all the Factories, as well as Workshops,
have been examined during the year by the Inspector and the
Medical Offieer, and the accommodation was found to be suitable
and sufficient: in the two of the Factories employing both sexes it
was all that could be desired.