This section sets out the handling,
recycling, storage, transportation and disposal measures which are recommended
to avoid, and minimize potential adverse impacts associated with waste arising
from the construction of the Project.
6.2.1
Management
of Waste Disposal
In accordance with the Waste Disposal (Charges for Disposal of
Construction Waste) Regulation, the Contractor should open a billing
account with the EPD. Every
construction waste or public fill load to be transferred to the Government
waste disposal facilities, namely public fill reception facilities,
construction waste sorting facilities, and landfills will require a valid “chit”
which contains information of the account holder (the Contractor) to facilitate
waste transaction recording and billing to the waste producer.
Inert C&D material generated from the
Project will be transferred to Tuen Mun Area 38 Fill Bank (TMFB), or other public fill
reception facilities, managed by Civil Engineering and Development Department
(CEDD), while the non-inert C&D material, after segregation, will be sent
to West New Territories Landfill (WENT), or other waste disposal facilities, managed
by the EPD.
A trip-ticket system will be maintained in
accordance with Environment, Transport
and Works Bureau Technical Circular No. 31/2004 and a recording system will
also established for recording the amount of waste and C&D material generated,
reused, recycled and disposed of (including the disposal sites) in a form of
similar to relevant appendices of Environment,
Transport and Works Bureau Technical Circular No. 19/2005. A sample of waste flow table (WFT) is
presented in Annex D to record the
quantities of waste and C&D material generated each month. The quantities and details of all the
recyclable and reused materials will also be recorded in the monthly summary
WFT. The quantities of waste and C&D
material generated, reused and recycled during the reporting month, together
with the disposal sites, will be presented in monthly EM&A report.
6.2.2
Approach
to Reduce Waste Generation
Construction and Demolition (C&D)
Material
C&D material would be generated from
the following works of the Project:
·
Road
widening works;
·
Construction
of retaining wall and flyover;
·
Demolition
of existing parapets or footing for existing noise barriers;
·
Fill
slope / slope reprofiling involved in road
realignment; and
·
Extension
of subway in
The types of C&D material during the
construction works would be excavated soil, fill and concrete.
The waste concrete and shotcrete
will be segregated from other non-inert C&D material and be disposed of at TMFB,
or other public fill reception facilities.
The non-inert C&D material will be
further segregated into recyclable material, such as cardboard, carton box,
waste paper and scrap metal for the collection by recyclers and non-recyclable
material, such as waste timber and packaging material, which will be disposed
of at WENT, or other waste disposal facilities.
General Refuse
General refuse will be generated from
daily site office operation and workforce.
Recycling bins should be provided at strategic locations, such as the entrance
of site office to facilitate recovery of aluminium cans and waste paper
generated from the Site. Materials
collected in the recycling bins should be collected by or sold to local
recyclers.
6.2.3
Management
of Chemical Waste
Chemical wastes likely to be generated
from the construction of the Project may include:
·
Residual
paints and solvents; and
·
Used
lubricant oil from maintenance of the construction plant.
It is anticipated that the quantity of
chemical waste to be generated will be small and in the order of a few hundred
litres for whole construction phase.
These chemical waste will be stored and disposed of in an appropriate
manner, as outlined in the Waste Disposal
(Chemical Waste) (General) Regulation and the Code of Practice on the Packaging, Labelling and Storage of Chemical
Wastes.
The Contractor should register as a
chemical waste producer with the EPD, and handle the chemical waste in accordance
with the Code of Practice on the Package,
Labelling and Storage of Chemical Wastes. A brief summary of the site arrangement
should be as follows:
Storage Containers
·
Be
suitable for the substance they are holding, resistant to corrosion, maintained
in a good condition, and securely closed;
·
Have
a capacity of less than 450L unless specifications have been approved by the EPD;
and
·
Display
a label in English and Chinese in accordance with instructions prescribed in
Schedule 2 of the Regulations.
Storage Area
·
Be
clearly labelled and used solely for the storage of chemical waste;
·
Be
enclosed on at least 3 sides;
·
Have
an impermeable floor and bunding, of a capacity to
accommodate 110% of the volume of the largest container or 20% by volume of the
chemical waste stored in that area, whichever is the greatest;
·
Have
adequate ventilation;
·
Be
covered to prevent rainfall entering (with water collected within the bund be
disposed of as chemical waste when necessary); and
·
Be
arranged so that incompatible materials are appropriately separated.
Disposal
·
Be
collected by licensed chemical waste collector; and
·
Be
disposed / transferred to a facility licensed to receive chemical waste, such
as Chemical Waste Treatment Facility (CWTF) at Tsing
Yi or other chemical waste recyclers.
At the commencement of the construction
works, training should be provided to workers on the concepts of site
cleanliness and on appropriate waste management procedures, including waste
reduction, reuse and recycling.
Location map and label showing different
waste facilities on site will be provided at conspicuous locations to
facilitate waste storage, segregation and recycling.
Tool box talk regarding waste management
practices on site should be arranged on regular basis to maintain and / or
improve site practices.
In order to review the good site practices
of waste management, regular audit and site inspection should be carried out by
the ET to check whether the Contractor has implemented the recommended good
site practices and other mitigation measures. The inspection should look at all
aspects of on-site waste management practices including waste generation,
storage, recycling, transport and disposal. Apart from site inspection, documents including
licences, permits, disposal and recycling records should be reviewed and
audited for compliance with the legislation and Contract requirements. Designated staff of the Contractor
responsible for resources allocation, staff training and controlling the
relevant documents will also be interviewed to review the effectiveness of site
management.
The requirements of the environmental
audit programme were set out in Section 8
of the Manual. The audit programme will
verify the implementation status and evaluate the effectiveness and stability
of the mitigation measures.
Good Site Practice
Under the condition of good site practices
are strictly followed, it is anticipated that no adverse waste management
related impacts would arise. Recommendations
for good site practices during the construction activities include:
·
nomination
of an approved personnel, such as a site manager, to be responsible for the
implementation of good site practices, arrangements for collection and
effective disposal to an appropriate facility, of all wastes generated at the
site;
·
training
of site personnel in site cleanliness, appropriate waste management procedures,
including chemical waste handling procedures, and concepts of waste reduction,
reuse and recycling;
·
provision
of sufficient waste disposal points and regular collection for disposal;
·
appropriate
measures to minimise windblown litter and dust during transportation of waste
by either covering trucks or by transporting wastes in enclosed containers;
·
separation
of chemical wastes for special handling and appropriate treatment at the CWTF;
·
regular
cleaning and maintenance programme for drainage systems, sumps and oil
interceptors;
·
implementation
with a recording system for the amount of wastes generated, recycled and
disposed (including the disposal sites; should be proposed; and
·
a waste management plan (WMP) should be prepared in accordance with ETWB
TC No. 19/2005 and submitted to the ER for approval.
Waste Reduction Measures
Good management and control can prevent
generation of significant amount of waste.
Waste reduction is best achieved at the planning and design stage, as
well as by ensuring the implementation of good site practices. Recommendations to achieve waste
reduction include:
·
Segregation
and storage of different types of waste in different containers, skips or
stockpiles to enhance reuse or recycling of material and their proper disposal;
·
Encourage
collection of aluminium cans and waste paper by individual collectors during
construction with separate labelled bins being provided to allow the
segregation of these wastes from other general refuse generated by the
workforce;
·
Any
unused chemicals and those with remaining functional capacity be recycled as
far as possible;
·
Use
of reusable non-timber formwork to reduce the amount of C&D materials;
·
Prior
to disposal of construction waste, wood, steel and other metals should be
separated, to the extent practical for re-use and/or recycling to reduce the
quantity of waste to be disposed at landfills;
·
Proper
storage and site practices to reduce the potential for damage or contamination
of construction materials; and
·
Plan
and stock construction materials carefully to reduce amount of waste generated
and avoid unnecessary generation of waste.
Waste management approach recommended in
the EIA Study is outlined in the Environmental Mitigation Implementation
Schedule (EMIS) (Annex B).
In the event of complaints, or
non-compliance / area of improvement is observed, the ET and the Contractor
should be responsible for reviewing the effectiveness of these mitigation
measures and for proposing to ER for approval, designing and implementing
alternative or additional mitigation measures as appropriate.