A waste management philosophy includes the following:
(i) Committing to comply with statutory, contractual and regulatory environmental requirements in all waste management issues related to the construction activities;
(ii) Committing to continual improvement of the waste management performance;
(iii) Reducing wastage of natural resources, raw materials and products;
(iv) Avoidance and minimisation of waste generation at source where possible.
(v) Reuse and recycling to avoid/minimise disposal
(vi) Raising the awareness and understanding of responsibilities of all staff in waste management;
(vii) Providing necessary training to all staff in order to have the knowledge and skills to successfully implement the waste management strategies; and
This Waste Management Plan has been compiled for implementation by the appointed Contractor with respect to the different key waste categories generated from the project. The measures for waste minimisation, reuse and recycling, treatment, storage, collection, transport and disposal for this Project has been considered in the plan.
The followings are legislation, regulations and guidelines that could be relevant to this project. The Government Technical Circulars proposed for Government projects are also included here for reference:
·
Waste
Disposal Plan for Hong Kong (December 1989), Planning, Environmental and Lands
Branch Government Secretariat;
·
New
Disposal Arrangements for Construction Waste (1992), Environmental Protection
Department & Civil Engineering Department;
·
Code
of Practice on the Packaging, Labelling and Storage of Chemical Wastes (1992),
Environmental Protection Department;
·
Works
Branch Technical Circular No. 6/92, Fill Management;
·
Works
Branch Technical Circular 22/92, Hong Kong Government;
·
Works
Branch Technical Circular No. 2/93, Public Dumps;
·
Work
Branch Technical circular No. 16/93, Wet Soil in Public Dumps;
·
Works
Bureau Technical Circular No. 5/98, On Site Sorting of Construction Waste on
Demolition Sites;
·
Works
Bureau Technical Circular No. 5/99, Trip-ticket System for Disposal of
Construction and Demolition Material;
·
Works
Bureau Technical Circular No. 25/99, Incorporation of Information on
Construction and Demolition Material Management in Public Works Subcommittee
Papers;
·
Technical
Circular No. 11/92 Classification of Dredging Sediments for Marine Disposal,
Environmental Protection Department;
The construction works will commence with removal of the existing median strip. The existing concrete road pavement will be demolished in stages on a lane-by-lane basis such that impact on the traffic movement can be minimised.
Temporary piles will be installed for temporary decking of the traffic lanes and footpath. Ultimately, a complete road deck flush with the existing road surface will be built to carry Nathan Road traffic while underground excavation works are carried out.
Excavation will be carried out beneath the deck proceeding layer by layer with regular monitoring of tunnel integrity. Excavated materials will be removed by gantry and hoist to trucks parked within the proposed noise enclosure at the opening near the middle strip of Nathan Road.
Excavated material generated from the construction activities shall be immediately loaded to a truck parked within the noise enclosure for delivery offsite. Based on a 10 hours working day and a truck capacity of 7.5m3, an average of 1.3 per hour of trucks is required for transportation of an estimated daily quantity of 100m3 excavated material per day.
The deck will be removed after the completion of the underground works and the road and utilities reinstated using again a lane-by-lane approach.
Excavated material is expected to be inert material and is not expected to give rise to any potential hazard during the handling, collection and disposal. The collected excavated material is the property of the contractor, who can either sell the material for reuse at other construction sites, or should dispose of its properly and economically in accordance with the relevant legislation, regulations and applicable guidelines.
If required by the Contractor, MTRCL could assist in identifying an available site such as the old airport site and possibly other locations for segregation and temporary storage of reusable and recyclable materials to facilitate subsequent reuse, and delivery of different categories of waste to identified disposal locations.
Construction and demolition material comprises uncontaminated inert materials generated during construction and demolition, including rejected concrete structures and materials which have been over ordered, or are surplus to requirements, and materials which have been used and discarded. Waste will arise from a number of different activities during construction, including:
·
formwork and falsework;
·
materials and equipment wrappings;
·
unusable or surplus cement/grouting mixes; and
·
damaged/surplus construction materials.
In order to minimise waste arising and keep environmental impacts within acceptable levels, the mitigation measures described here should be adopted as far as practicable:
·
Careful design, planning and good site management to minimise over
ordering and waste of materials such as concrete, mortars and cement
grouts. The design of formwork should
maximise the use of standard wooden panels so that high reuse levels can be
achieved. Alternatives such as steel
formwork or plastic facing should be considered to increase the potential for
reuse while taking into account the site restrictions. Plywood containing tropical hardwoods shall
not be used for hoarding or formwork;
·
Proper segregation and storage of wastes shall be undertaken to enhance
reuse or recycling of materials and their proper disposal as far as
practicable. A temporary storage area
equipped with required control measures should be provided onsite or off-site
for temporary storage of construction and demolition material/ waste. Onsite storage of construction and
demolition material/ waste shall be minimised as far as practicable.
·
Remaining materials containing putrid materials should be disposed of
at landfill;
·
Propose measures for monitoring and record of wastes generation and
their disposal and obtain agreement from MTRCL.
The use of chemical on site should be minimised as far as possible. If unavoidable, it may be possible to find alternatives, which generate reduced quantities or even no chemical waste, or less dangerous types of chemical waste.
Chemical waste that is produced, as defined by Schedule 1 of the Waste Disposal (Chemical Waste) (General) Regulation, 1992 should be handled properly in accordance with the relevant procedures specified under the legislation.
General refuse generated on-site should be stored in enclosed bins separate from construction and chemical wastes. This should be disposed of on a daily or every second day basis to minimise odour, pest and litter impacts. The burning of refuse on site is prohibited.
The Contractor shall be responsible for all day-to-day management of waste related issues including monitoring of waste generation and to authorise disposal in accordance to the requirements of this waste management plan. He is responsible for ensuring substantial records regarding the waste generation and disposal scenarios are kept for future reference. The monitoring records shall be made available for checking by the Environmental Team on a monthly basis.
A designated operator of the Contractor should be responsible for waste disposal and other waste related issues. All construction waste, municipal waste, and chemical waste shall be collected, handled and disposed of according to the local laws and requirements of statutory regulations.
Waste storage facilities at designated location for temporary storage of construction waste shall be provided by the contractor. Different waste types shall be stored separately where possible. As a minimum, waste should be separated into inert construction waste, non-inert waste and chemical waste as far as practicable. Waste storage areas shall be clearly labelled, well segregated, and easily accessible.
Training for all relevant staff covering as a minimum waste storage and handling, waste type, storage, and general house keeping including but not limited to waste reduction, reuse and recycling, and avoid contamination of reusable C&DM shall be arranged by the Contractor. The staff should also be informed of the waste handling/disposal arrangements. A training record shall be kept on site and updated.
The Contractor shall agree with the Environmental Team the format of the record form for waste generation and disposal.
Regular meetings with the Environmental Team shall be attended to report on the status of the implementation of the waste management plan as well as the disposal and treatment of wastes generated by this contract. Meeting records shall be prepared and kept for future reference.