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The Director of Drainage Services, Mr Ng Yee-yum, said providing cost- effective drainage facilities to combat pollution had always been his department's main objective.
He said his department's sewerage services offered to the public had expanded rapidly since its establishment in September 1989.
"The volume of sewage treated by us has increased by 50 per cent from 360 million cubic metres in 1990-91 to 540 million cubic metres in 1994-95.
"We have at present over 1,100 kilometres of sewer and 66 sewage treatment plants to help us keep the Hong Kong waters clean.
"This new sewerage system in Stanley adds further strength to our combat against pollution," Mr Ng said.
The Stanley Underground Sewage Treatment Plant will collect and treat about 11,600 cubic metres of sewage from Stanley and nearby areas every day before disposal.
The sewage will undergo secondary treatment using aeration process.
After disinfection, effluent from the underground plant is disposed of into ocean currents southeast of the Stanley Peninsula via a submarine outfall pipeline of 0.6 metre in diameter and 2.5 kilometres in length.
The underground sewage treatment plant not only visually unintrusive, but also has had little environmental impact on neighbouring residents during its construction and operation.
The service area of the treatment plant is of the same size as the main concourse of the Mass Transit Railway Central Station.
The construction works for the scheme commenced in late 1990 and were completed early this year at a total cost of $410 million.
End/Wednesday, July 19, 1995
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