6.1
Waste management during the construction phase would be the
contractor’s responsibility. The
contractor must confirm that all wastes produced during the construction phase
of the Project are handled, stored and disposed of in accordance with good
waste management practices and EPD’s regulations and requirements. The recommended mitigation measures in
the EIA Report should form the basis of the Waste Management Plan to be
developed by the Contractor in the construction stage.
6.2
Waste materials generated during construction activities,
such as construction and demolition (C&D) material and general refuse, are
recommended to be audited at regular intervals (at least quarterly) to ensure
that proper storage, transportation and disposal practices are being
implemented. This monitoring of
waste management practices would confirm that these solid wastes generated during
construction are not disposed of into the adjacent coastal waters. The Contractor would be responsible for
the implementation of mitigation measures to minimize waste or redress problems
arising from the waste materials.
6.3
Mitigation measures for waste management as recommended in
the EIA Report are summarized below. With the appropriate handling, storage
and disposal of waste arising during the construction works as defined below,
the potential to cause adverse environmental impacts would be minimized.
6.4
During the site inspections, the ET shall pay special
attention to the issues relating to waste management and check whether the
Contractor has implemented the recommended good site practices and other
mitigation measures.
Good Site
Practices
6.5
Adverse impacts related to waste management are not expected
to arise, provided that good site practices are strictly followed. Recommendations for good site practices
during the construction activities include:
§
Nomination
of an approved person, such as a site manager, to be responsible for 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 proper waste management and chemical waste handling
procedures
§
Provision
of sufficient waste disposal points and regular collection of waste
§
Appropriate
measures to minimize windblown litter and dust during transportation of waste
by either covering trucks or by transporting wastes in enclosed containers
§
Regular
cleaning and maintenance programme for drainage systems, sumps and oil
interceptors
§
Separation
of chemical wastes for special handling and appropriate treatment at the
Chemical Waste Treatment Centre.
Waste
Reduction Measures
6.6
Good management and control can prevent the generation of a
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:
§
Sort
C&D waste from demolition of existing facilities to recover recyclable
portions such as metals
§
Segregation
and storage of different types of waste in different containers, skips or
stockpiles to enhance reuse or recycling of materials and their proper disposal
§
Encourage
collection of aluminium cans by providing separate labelled bins to enable this
waste to be segregated from other general refuse generated by the workforce
§
Proper
storage and site practices to minimize the potential for damage or
contamination of construction materials
§
Plan
and stock construction materials carefully to minimize amount of waste
generated and avoid unnecessary generation of waste
§
A
recording system for the amount of wastes generated, recycled and disposed
(including disposal sites) should be proposed
§
Training
should be provided to workers about the concepts of site cleanliness and
appropriate waste management procedures, including waste reduction, reuse and
recycle.
6.7
A Waste Management Plan (WMP) should be prepared by the
Contractor prior to the commencement of construction work to provide an overall
framework for waste management and reduction. The WMP shall be certified by the ET
Leader and verified by the IEC.
6.8
In addition to the above measures, specific mitigation
measures are recommended below for the identified waste arisings to minimise
environmental impacts during handling, transportation and disposal of these
wastes.
Construction
and Demolition Material
6.9
In order to minimise impacts resulting from collection and
transportation of C&D material for off-site disposal, the excavated
materials arising from station and tunnel construction should be reused on-site
as backfilling material (e.g. for the construction shafts and cut and cover
station at KET) and for landscaping works as far as practicable. Surplus rock generated from the
tunnelling works, shafts/adits construction and the stations cavern
construction should be reused in reclamation and site formation projects either
in the Mainland or
6.10
Material delivered to PFRFs should be of size less than
250mm or other sizes as agreed with the Secretary of the Public Fill Committee.
General
Refuse
6.11
General refuse should be stored in enclosed bins or
compaction units separate from C&D material. A reputable waste collector should be
employed by the contractor to remove general refuse from the site, separately
from C&D material and chemical wastes.
Preferably an enclosed and covered area should be provided to reduce the
occurrence of 'wind blown' light material.
Chemical
Wastes
6.12
If chemical wastes are produced at the construction site,
the Contractor would be required to register with the EPD as a chemical waste
producer and to follow the guidelines stated in the Code of Practice on the
Packaging, Labelling and Storage of Chemical Wastes. Good quality containers compatible
with the chemical wastes should be used, and incompatible chemicals should be
stored separately. Appropriate
labels should be securely attached on each chemical waste container indicating
the corresponding chemical characteristics of the chemical waste, such as
explosive, flammable, oxidizing, irritant, toxic, harmful, corrosive, etc. The Contractor shall use a licensed
collector to transport and dispose of the chemical wastes, to either the
approved Chemical Waste Treatment Centre, or another licensed facility, in
accordance with the Waste Disposal (Chemical Waste) (General) Regulation.
6.13
The implementation schedule of the recommended mitigation
measures is presented in Appendix A.