4
Civil Installation:
Installation should only be carried out by
qualified and experienced professionals who
understand sewage and drainage systems and their
obligations under the Health and Safety at Work
Act, Construction Design Management (CDM)
Regulations and the Environmental Protection Act.
Where necessary they should seek advice from a
civil engineer.
Electrical work:
Electrical works must be carried out safely and
securely by a qualified electrician in accordance
with the engineering standards.
Servicing & maintenance:
WPL recommends a British Water Accredited
service engineer when dealing with harmful
micro-organisms.
De-sludging & frequency:
De-sludging should be carried out by professionals
holding the relevant permits to transport and
dispose of sewage sludge.
They will also be able to advise the correct
de-sludge frequency by analysing the percentage
of settled sludge (i.e. sludge volume) to the
clear liquor.
Sampling:
WPL recommends sampling to be undertaken by a
British Water Accredited service engineer. Samples
can be taken from a sample chamber or an external
pumping chamber.
Dangerous gasses
inside the tank:
Sewage gases are potentially explosive and
toxic. Do not enter any of the below ground
compartments of the sewage treatment plant.
