5.1.1
Waste
management will be the contractor’s responsibility to ensure that all wastes
generated during construction of the CWB & IECL are handled, stored and
disposed of in accordance with good waste management practices and EPD’s
regulations and requirements.
5.1.2
Waste
materials generated during construction activities, such as construction and
demolition (C&D) materials, chemical wastes and general refuse from the
workforce, are recommended to be audited periodically to determine if wastes
are being managed in accordance with approved procedures and the site Waste
Management Plan. The audits should look
at all aspects of waste management including waste generation, storage,
recycling, transport and disposal. An
appropriate audit programme would be to undertake a first audit at the
commencement of the construction works, and then to audit quarterly thereafter.
The Contractor will be responsible for the implementation of any mitigation
measures to minimise waste arisings or to redress problems arising from the
waste materials.
5.2.1
Mitigation
measures for waste management are summarised below. With appropriate handling,
storage and removal of waste arisings during the construction of the CWB &
IECL as defined below, the potential to cause adverse environmental impacts
will be minimised. The implementation
schedule of recommended mitigation measures for waste management is presented
in Appendix A.
Segregation
of Wastes
5.2.2
In
order to ensure that all waste is disposed of in an appropriate manner, waste
shall be separated by category on‑site by the Contractor. It is recommended that the waste could be
segregated into defined categories and then be disposed of as follows:
·
inert portion of C&D material (including inert excavated material), that is, public fill, deemed suitable for re-use on site as
far as possible and only the surplus material should be disposed of off-site;
·
non-inert portion of C&D material,
that is, C&D waste deemed
unsuitable for reclamation or land formation shall be disposed of at landfill;
·
chemical waste as defined by Schedule 1 of
the Waste Regulations (Chemical) 1992, shall be stored in accordance with
approved methods defined in the Regulations and the chemical waste disposed of
at the Chemical Waste Treatment Centre located at Tsing Yi; and
·
general refuse shall be collected by a
licensed sanitary contractor and disposed of at landfill.
Waste
Minimisation
5.2.3
C&D
materials should be recycled or reused wherever possible. The waste management strategy to be employed
shall be waste minimisation at source.
Where waste generation is unavoidable then the potential for reuse or recycling
shall be explored and opportunities taken.
If wastes cannot be reused or recycled then the recommended disposal
routes shall be followed.
5.2.4
Waste
reduction measures shall be introduced at the design stage and carried through
the construction activities, wherever possible, by careful purchasing control,
reuse of formwork and good site management.
5.2.5
Training
and instruction of construction staff shall be given at the site to increase
awareness and draw attention to waste management issues and the need to
minimise waste generation. The training
requirements shall be included in the site Waste Management Plan.
Storage,
Collection and Transport of Waste
5.2.6
Reputable
waste hauliers shall be used to collect and transport the wastes to the
appropriate disposal points. The
necessary measures to minimise adverse impacts such as windblown litter and
dust from the transportation of these wastes, and impacts on water quality
during the storage, handling and transportation of these wastes shall also be
instigated.
5.2.7
The
following shall be observed:
·
prior to disposal of C&D
waste, steel and other metals shall be separated for re-use and/or recycling to
minimise the quantity of waste to be disposed of to landfill;
·
wastes shall be handled and
stored in a manner, which ensures that they are held securely without loss or
leakage thereby minimising the potential for pollution. Release of potential pollutants into marine
waters during storage and handling shall not be permitted;
·
only reputable waste
hauliers authorised to collect the specific category of waste concerned shall be employed;
·
removal of demolition
material shall coincide with the demolition work;
·
appropriate measures shall
be employed to minimise windblown litter and dust during transportation by
either covering trucks or transporting wastes in enclosed containers;
·
the necessary waste disposal
permits shall be obtained from the appropriate authorities, if they are
required, in accordance with the Waste Disposal Ordinance (Cap. 354), Waste
Disposal (Chemical Waste) (General) Regulation (Cap. 354) and the Lands
Ordinance;
·
waste shall only be disposed
of at licensed sites and the site staff and Contractor shall develop procedures
to ensure that illegal disposal of wastes does not occur;
·
waste storage areas shall be
well maintained and cleaned regularly;
·
in order to monitor the
disposal of public fill and solid wastes at public filling areas and landfills,
and to control fly-tipping, a trip-ticket system shall be included as one of
the contractual requirements and implemented by the ET; and
·
the amount of wastes
generated, recycled and disposed of off-site during the implementation of the
project should be recorded.
5.2.8
During
the site inspections as described in Section 7.1 of this Manual, the ET Leader
shall pay special attention to the issues relating to waste management, and
check whether the Contractor has followed the relevant contract specifications
and the procedures specified under the laws of Hong Kong.
Stringent control and audit will be necessary to ensure that effective
waste management practices and correct storage, transportation and disposal
requirements for the various waste materials are being implemented.