7.1.1.1
Waste management during the construction phase will mainly be the
responsibility of the Contractor, who shall implement the mitigation measures
recommended in the EIA Report in order to minimise waste or resolve the issues
associated with the management of wastes.
The Contractor shall also ensure that all wastes produced during the
construction phase would be handled, stored and disposed of in accordance with
good waste management practices, relevant legislation and waste management
guidelines. Wastes generated from
the construction activities, such as the construction and demolition (C&D)
materials, shall be audited at regular intervals to ensure that proper storage,
transportation and disposal practices are undertaken. Such audits would ensure that the wastes
generated would be properly disposed of.
7.1.1.2
No significant wastes are expected to be generated from the operational
phase of the Project and no adverse environmental impacts would arise with the
implementation of good waste management practices. Therefore, an audit programme for the
operational phase will not be required.
7.2.1.1
With the proper handling, storage and disposal of wastes arising from
the construction works as recommended in the EIA Report and summarised in the Environmental
Mitigation Implementation Schedule (EMIS) in Appendix A of this EM&A
Manual, the potential for adverse environmental impacts is minimised. During weekly site inspections and
audits, the Engineer and ET shall pay special attention to the issues relating
to the waste management and check whether the Contractor has implemented the
recommended good site practices and other mitigation measures on waste
management. The following waste management measures shall be implemented by the
Contractor:
·
The requirements
as stipulated in the ETWB TC(W) No.19/2005 Environmental
Management on Construction Sites and the other relevant guidelines should be
included in the Particular Specification for the Contractor as appropriate.
·
The Contractor should submit a Waste
Management Plan (WMP) as part of the Environmental Management Plan (EMP) to
Architect/Engineer for approval prior to the commencement of construction work,
in accordance with the ETWB TC(W) No.19/2005 so as to provide an overall
framework of waste management and reduction. The WMP should include:
-
Waste management policy;
-
Record of generated waste;
-
Waste reduction target;
-
Waste reduction programme;
-
Role and responsibility of waste management team;
-
Benefit of waste management;
-
Analysis of waste materials;
-
Reuse, recycling and disposal plans;
-
Transportation process of waste products; and
-
Monitoring and action plan.
·
The waste
management hierarchy, which includes the following in descending preference,
should be strictly followed:
-
Avoidance and reduction of waste generation;
-
Reuse of materials as far as practicable;
-
Recovery and recycling of residual materials where
possible; and
-
Disposal according to relevant legislations,
guidelines and good practices.
·
This hierarchy
should be adopted to evaluate the waste management options in order to maximise
the extent of waste reduction and cost reduction. The records of quantities of waste
generated, recycled and disposed (locations) should be properly documented.
·
A trip-ticket
system should be established in accordance with DevB TC(W) No. 6/2010 and Waste
Disposal (Charges for Disposal of Construction Waste) Regulation to monitor the
disposal of inert C&D materials to public fill and solid wastes to
landfills, and to control fly-tipping.
A trip-ticket system would be included as one of the contractual
requirements for the Contractor to strictly implement. The Engineer would also regularly audit
the effectiveness of the system.
·
The Contractor
should also provide proper training to workers regarding the appropriate
concepts of site cleanliness and waste management procedures, e.g. waste
reduction, reuse and recycling all the time.
·
The site and
surroundings shall be kept tidy and litter free.
·
No waste shall be
burnt on-site.
·
Prohibit the
Contractor to dispose of inert C&D materials at any sensitive locations
e.g. natural habitat, etc. The
Contractor should propose the final disposal sites in the EMP and WMP for the
Architect/ Engineer’s approval before implementation.
·
The Contractor
should recycle as much of the non-inert C&D materials as possible
on-site. The non-inert C&D
waste should be segregated and stored in separate containers or skips to
facilitate the reuse or recycling of materials and proper disposal.
·
The Contractor
shall register as Chemical Waste Producers with the EPD. Chemical waste should be handled in
accordance with the Code of Practice on the Packaging, Labelling and Storage of
Chemical Wastes as follows:
-
The containers used for storing chemical waste
should be suitable for the substance to be held, resistant to corrosion,
maintained in good conditions and securely closed;
-
The containers should have a capacity of <450L
unless the specifications have been approved by the EPD;
-
The label on the containers should be clearly
labelled in English and Chinese and comply with the requirements prescribed in
Schedule 2 of Waste Disposal (Chemical Waste) (General) Regulation;
-
The storage area for the chemical waste should be
used solely for the storage of chemical wastes;
-
The storage area should be enclosed on at least
three sides by a wall, partition or fence with a height of not less than two
metres or the total height of containers in stack, whichever is less;
-
Where containers of liquid chemical wastes are
stored, the area should be designed with impermeable floor and provided with a
bund with capacity to accommodate 110% of the volume of the largest container
or 20% by volume of the chemical waste stored in the area, whichever is
greatest;
-
Adequate ventilation should be allowed in the
storage area by leaving some space between the top of the enclosure walls and
the ceiling, or provision of louvers on the sides of the enclosure walls;
-
The storage area should be sufficiently covered to
prevent rainfall entering (water collected within the bund must be tested and
disposed of as chemical waste, if necessary); and
-
Separate containers should be used for packing
different types of waste or waste arising from different sources and process to
minimise mixing of incompatible materials.
-
Drip tray should be provided to chemical waste
containers. The drip tray should be clean up regularly. Clean up should be done
before foreseeable inclement weather such as typhoon or heavy rain.
·
Waste oils,
chemicals or solvents shall not be disposed of to drain.
·
General refuse
arising on-site should be stored in enclosed bins or compaction units
separately from C&D materials/ wastes and chemical wastes. Sufficient bins shall be provided for
storage of general refuse as required under the Public Cleansing and Prevention
of Nuisances Regulation. In
addition, general refuse shall be cleared daily and shall be disposed of to the
nearest landfill or refuse transfer station. Burning of refuse on construction sites
is prohibited. Disposal of general refuse is recommended before foreseeable
inclement weather such as typhoon or heavy rain.
·
All waste
containers shall be in a secure area on hardstanding.
·
Segregation and
storage of different types of waste should be promoted to facilitate the reuse
and recycling of the materials. Separately labelled bins for the deposition of
aluminum cans, paper and plastic bottles etc. should be provided as far as
practicable. Participation in a local collection scheme by the Contractor
should be advocated.
7.3.1.1
Weekly site inspections and audits shall be carried out by the ET, as
detailed in Table 6.1, to ensure
that the recommended good site practices and other mitigation measures are
implemented by the Contractor. The inspections
and audits shall look at all aspects of on-site waste management practices
including the waste generation, storage, recycling, transport and disposal. Documents
including licenses, permits, disposal and recycling records shall be reviewed
and audited for the compliance with the legislation and contract
requirements.
Table 7.1 Waste
Management Checklist
|
Activities |
Timing |
Audit/
Inspection Frequency |
If
non-compliance, Action Required |
|
All necessary waste disposal permits or licences
have been obtained |
Before commencement of works |
Once |
Apply for the necessary permits/ licences prior to
disposal of the waste. The ET
shall ensure that corrective action has been taken. |
|
Only licensed waste haulers are used for waste
collection. |
Throughout the works |
Weekly |
The ET shall inform the ER and IEC of the
non-compliance. The ER shall
instruct the Contractor to use a licensed waste hauler. The Contractor shall temporarily
suspend waste collection of that particular waste until a licensed waste
hauler is used. Corrective action
shall be undertaken within 48 hours. |
|
Records of quantities of wastes generated, recycled
and disposed are properly kept.
For demolition material/waste, the number of loads for each day shall
be recorded (quantity of waste can then be estimated based on average truck
load. Should landfill charging be
implemented, the receipts of the charge could be used for estimating the
quantity). |
Throughout the works |
Weekly |
The Contractor shall estimate the missing data based
on previous records and the activities carried out. The ET shall audit the results and
forward to the ER and IEC for approval. |
|
Wastes are removed from site in a timely
manner. General refuse is collected
on a daily basis. |
Throughout the works |
Weekly |
The ET shall inform the ER and IEC of the
non-compliance. The ER shall
instruct the Contractor to remove waste accordingly. |
|
Waste storage areas are properly cleaned and do not
cause windblown litter and dust nuisance. |
Throughout the works |
Weekly |
The ET shall inform the ER and IEC of the
non-compliance. The ER shall
instruct the Contractor to clean the storage area and/or cover the waste. |
|
Different types of waste are segregated in different
containers or skip to enhance recycling of material and proper disposal of
waste. |
Throughout the works |
Weekly |
The ET shall inform the ER and IEC of the
non-compliance. The ER shall
instruct the Contractor to provide separate skips/ containers. The Contractor shall ensure the
workers place the waste in the appropriate containers. |
|
Chemical wastes are stored, handled and disposed of
in accordance with the Code of Practice on the Packaging, Handling and
Storage of Chemical Wastes, published by the EPD. |
Throughout the works |
Weekly |
The ET shall inform the ER and IEC of the
non-compliance. The ER shall
instruct the Contractor to rectify the problems immediately. Warning shall be given to the Contractor
if corrective actions are not taken within 24 hrs and the Regional Office of
EPD shall be notified. |
|
Demolition material/waste in dump trucks are
properly covered before leaving the site. |
Throughout the works |
Weekly |
The ET shall inform the ER and IEC of the
non-compliance. The ER shall
instruct the Contractor to comply.
The Contractor shall prevent trucks from leaving the site until the
waste are properly covered. |
|
Wastes are disposal of at licensed sites. |
Throughout the works |
Weekly |
The ET shall inform the ER and IEC of the
non-compliance. The ER shall warn
the Contractor and instruct the Contractor to ensure the wastes are disposed
of at the licensed sites. Should
it involve chemical waste, the Regional Office of EPD shall be notified. |
Note: ET –
Environmental Team, IEC – Independent Environmental Checker, ER – Engineer’s
Representative