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In line with the way forward as recommended by the International Review Panel (the IRP) in 2000, the Study on Procurement Options for Further Stages of the Harbour Area Treatment Scheme (HATS) was carried out to identify the most efficient and effective procurement arrangement for implementing the further stages of the Harbour Area Treatment Scheme.
The Study, which was administered by Drainage Services Department (DSD) under Agreement No. CE 49/2001 (DS), commenced on 21 March 2002 and was completed in end 2006.
Under Phases I and II of the Study, all the possible procurement options for implementing HATS Stage 2 had been reviewed having regard to overseas experience. It was concluded that we should consider using the Design-Build approach to construct underground tunnels as far as possible. As regards the provision of the biological treatment facilities, the Study recommended that we should consider the use of Public Private Partnership, possibly by means of Design-Build-Operate arrangement. The recommendations under Phases I and II of the Study had been fed into the Environmental and Engineering Feasibility Assessment Studies (EEFS).
The final phase of the Study, Phase III, commenced in March 2005 after the way forward for the implementation of HATS Stage 2 had been decided following the public consultation exercise held in the second half of 2004. It had developed the consultancy and contract strategies and administration structures for the phased implementation of HATS Stage 2. This last phase had also reviewed the previously recommended procurement options to take into account the fact that the upgrading of Stonecutters Island Sewage Treatment Works would now be constructed in two phases. It was concluded that we should consider using enhanced Design-Build approach for both the upgrading of Stonecutters Island Sewage Treatment Works and the associated preliminary treatment works under HATS Stage 2A. Under the enhanced Design-Build approach, the Engineer will complete an outline design and a performance specification, and the contractor will carry out the detailed design and the construction works.
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