14.1
This chapter presents the implementation schedule of the
proposed mitigation measures for the Project. Table
14.1 summarises the details of the mitigation measures for all
works areas. For
each recommended mitigation measure, both the location and timing for the
measure have been clearly identified.
As well, the parties responsible for implementing the measure and for
maintenance (where applicable) have also been clearly identified.
14.2
An ecological impact assessment has been conducted for the
proposed underground magazine site and is presented in Appendix 2.3. Mitigation
measures have been recommended to minimize the ecological impacts, and are
summarized in Table 14.2 below.
14.3
As mentioned in Section 2.76, an Environmental Report for Variation
of Environmental Permit (ER for
VEP) Application of “Demolition of Buildings and
Structures in Proposed Kennedy Town Comprehensive Development Area Site”
submitted by CEDD was approved by EPD under the EIAO in April 2007. Under the VEP, demolition and clearance
of buildings and surface structures within the site would be conducted, and a
paving layer of not less than
Table 14.1 Project
Implementation Schedule for
All Works Areas
EIA Ref. |
EM&A
Ref. |
Recommended
Mitigation Measures |
Objectives
of the Recommended Measure & Main Concern to Address |
Who to
implement the measure? |
Location
of the measure |
When to
implement the measure? |
EIA Requirements |
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Airborne Noise Impact (Construction
Phase) |
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S 3.55 |
S 2.23 |
The following good site practices
shall be implemented: -
Only well-maintained plant shall be operated on-site
and plant shall be serviced regularly during the construction
program -
Silencers or mufflers on construction equipment shall be utilized and shall be properly maintained during the
construction program -
Mobile plant, if any, shall be sited as far from
NSRs as possible -
Machines and plant (such as trucks) that may be in
intermittent use shall be shut down between work periods
or shall be throttled down to a minimum -
Plant known to emit noise strongly in one direction shall,
wherever possible, be orientated so that the noise is directed away from the
nearby NSRs -
Material stockpiles and other structures shall be effectively utilized, wherever practicable, in screening noise from
on-site construction activities. |
To reduce construction noise impact |
MTRC / Contractor |
All works areas |
Construction phase |
Noise Control Ordinance |
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S 3.56-3.57, Table 3.10 |
S 2.23 |
Quieter plant shall be used for the following PME:
|
To reduce construction noise impacts |
MTRC / Contractor |
All works areas |
Construction phase |
Noise Control Ordinance |
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S 3.58-3.59 |
S 2.23 |
Movable noise barrier shall be used for the following PME where practicable:
|
To reduce construction noise impacts |
MTRC / Contractor |
Works areas A, C, D, H, I, J, J1, L1, M1, N1, M3, O1, O2 and
O3. |
Construction phase |
Noise Control Ordinance |
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S 3.60 |
S 2.23 |
Noise enclosure/acoustic
shed shall be used for the following PME where practicable:
|
To reduce construction noise impacts |
MTRC / Contractor |
All works areas |
Construction phase |
Noise Control Ordinance |
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S 3.61 |
S 2.23 |
Acoustic Enclosure shall be used for enclosing the rock
drill as fully as possible.
|
To reduce construction noise impacts |
MTRC / Contractor |
Works areas H,
N1 and M |
Construction phase |
Noise Control Ordinance |
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S 3.62 |
S 2.23 |
Noise insulating cover shall be used to cover the
following PME:
|
To reduce construction noise impacts |
MTRC / Contractor |
Works areas J1, N1, M1 and M3 |
Construction phase |
Noise Control Ordinance |
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S 3.63 |
S 2.23 |
Silencer shall be used for the ventilation fan
|
To reduce construction noise impacts |
MTRC / Contractor |
Works areas MA, A, C, D, G, H, I, J, J1, J2, J3, L1, M,
M1, M3, N1, O1, O2 and O3. |
Construction phase |
Noise Control Ordinance |
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S 3.64 |
S 2.23 |
Noise insulating fabric shall be applied where
practicable to cover the following PME:
|
To reduce construction noise impacts |
MTRC / Contractor |
Works areas MA, C, D, G, H, I, J, J1, J2, J3, L1, M, M1,
M3, N1, O1, O2 and O3. |
Construction phase |
Noise Control Ordinance |
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S 3.65 |
S 2.23 |
Use of “Noise Control Curtain” - a noise insulating
fabric to be mounted on the steel scaffold erected on the buildings to
be demolished to an extent such that the line of sight between the noise
source and NSR would be blocked
|
To reduce construction noise impacts |
MTRC / Contractor |
Works area A |
Construction Phase – during the demolition of Block A
& C of Kennedy Town Ex-Police Quarter |
Noise Control Ordinance |
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S 3.67-3.70, Figure 3.17 and 3.18. |
S 2.23 |
Temporary noise barriers shall be erected at the
works areas of West of KET Station and SYP Entrance A1 & A2.
|
To reduce construction noise impacts |
MTRC / Contractor |
Works areas C and N1 |
Construction phase |
Noise Control Ordinance |
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S 3.71 |
S 2.23 |
Decking
over would be provided to cover the excavation area. |
To reduce construction noise impacts |
MTRC / Contractor |
Works areas J, J3, G and L1 |
Construction phase |
Noise Control Ordinance |
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S3.72 |
S 2.23 |
Full enclosure of entire works area |
To reduce construction noise impacts |
MTRC / Contractor |
Works area J2 |
Construction Phase
(after piling is completed) |
Noise Control Ordinance |
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S3.73 – 3.74 |
S 2.23 |
Use of concrete crusher instead of hydraulic breaker |
To reduce construction noise impacts |
MTRC / Contractor |
Works area J2, M1 and M3 |
Construction Phase |
Noise Control Ordinance |
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Airborne Noise Impact (Operation
Phase) |
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S 3.50-3.51, Table 3.9 |
Appendix B |
The maximum permissible sound power levels (Max SWLs) for
the fixed plant shall be complied with during the selection of equipment and
mitigation measures. |
To comply with the noise criteria of Noise Control
Ordinance |
MTRC / Contractor |
Vent shafts and chiller plants at KET
Station, UNI Entrance C1 and SYP Entrance C, and vent shafts at KET Ex-Police
Quarter, UNI Vent Shaft-Y and SYP Entrance A1&A2. |
Design and operation phases |
Noise Control Ordinance |
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S 3.77 |
Appendix A |
The following shall be considered as far as possible in
the detailed design of fixed plant: -
Choose quieter plant such as
those which have been effectively silenced. -
Include noise levels
specification when ordering new plant (including chiller and E/M equipment). -
Locate fixed plant/louver away
from any NSRs as far as practicable. -
Locate fixed plant in walled
plant rooms or in specially designed enclosures. -
Locate noisy machines in a
basement or a completely separate building. -
Install direct noise mitigation measures including
silencers, acoustic louvers and acoustic enclosure where necessary. |
To comply with the noise criteria of Noise Control
Ordinance |
MTRC / Contractor |
Vent shafts and chiller plants at KET
Station, UNI Entrance C1 and SYP Entrance C, and vent shafts at KET Ex-Police
Quarter, UNI Vent Shaft-Y and SYP Entrance A1&A2. |
Design and operation phases |
Noise Control Ordinance |
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Groundborne Noise
Impact |
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S4.91 |
S3.1 |
Ground-borne construction noise
monitoring shall be conducted.
The measurement locations shall be above the cutting face of the TBM,
and shall be located as close to the cutting face as practicable. |
To comply with the noise criteria of Noise Control
Ordinance |
MTRC / Contractor |
Works areas of tunneling by TBM |
Construction phase |
Noise Control Ordinance and |
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S 4.88 & Table 4.10 |
S 3.2 |
Type 1a Trackform – Resilient Baseplate with stiffness of
about 25 KN/mm shall be installed at both the west-
and east-bounds
starting from turnout in proximity of |
To comply with the noise criteria of Noise Control
Ordinance |
MTRC |
Tunnel alignment |
Operation phase |
Noise Control Ordinance |
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Landscape and Visual
Impact (Construction Phase) |
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Table 5.4 |
Table
4.2 |
Re-use
of Existing Soil Existing
topsoil shall be re-used where possible for new planting areas within the
project. The construction program shall consider using the soil removed from
one phase for backfilling another. Suitable storage ground, gathering ground
and mixing ground may be set up on-site as necessary. §
|
To reduce the volume of soil for disposal |
MTRC / Contractor |
All Works areas |
Construction phase |
EIA Recommendation |
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Table 5.4 |
Table
4.2 |
No-intrusion
Zone To
maximize protection to existing trees, ground vegetation and the associated understory
habitats, construction contracts may designate “No-intrusion Zone” to various
areas within the site boundary with rigid and durable fencing for each
individual no-intrusion zone. The contractor should close monitor and
restrict the site working staff not to enter the “no-intrusion zone”, even
for non-direct construction activities and storage of equipment. |
To protect the existing trees, ground vegetation and the
associated understory habitats. |
MTRC / Contractor |
All Works areas |
Construction phase |
EIA Recommendation |
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Table 5.4 |
Table
4.2 |
Decorative
Hoarding Erection
of decorative screen hoarding should be designed to be compatible with the
existing urban context. |
To reduce visual impact due to construction |
MTRC / Contractor |
All Works areas |
Construction phase |
EIA Recommendation |
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Table 5.4 |
Table
4.2 |
Minimize
light pollution and control of night-time glare All
security floodlights for construction sites shall be equipped with adjustable
shield, frosted diffusers and reflective covers, and be carefully controlled
to minimize light pollution and night-time glare to nearby residences and GIC
users. The Contractor shall consider other security measures which shall
minimize the visual impacts. |
To minimize the visual impacts. |
MTRC / Contractor |
All Works areas |
Construction phase |
EIA Recommendation |
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Table 5.4 |
Table
4.2 |
Aesthetic
design of the conveyor belt system The
removal of excavated material requires installation of a conveyor and a
barging point. The conveyor will be covered, except the portion where it meets
the barging point. The aim of covering or enclosing the conveyor is to avoid
noise and air quality issues; however, the conveyor where above-ground should
be adequately screened and /or constructed of suitable materials and in
colours/tones that minimize visual intrusion. |
To minimize the visual intrusion as well as the air and
noise quality issues |
MTRC / Contractor |
Works areas E & F |
Construction phase |
EIA Recommendation |
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Table 5.4 |
Table
4.2 |
Protection
of Retained Trees All
retained trees should be recorded photographically at the commencement of the
Contract, and carefully protected during the construction period. Detailed
tree protection specification shall be allowed and included in the Contract
Specification, which specifying the tree protection requirement, submission
and approval system, and the tree monitoring system. In
addition, the Contractor shall be required to submit, for approval, a
detailed working method statement for the protection of trees prior to
undertaking any works adjacent to all retained trees, including trees in
contractor’s works areas. All
implementation of tree protection works and tree preservation measures shall
be supervised by a landscape specialist on site. |
To protect the retained trees within the site boundary |
MTRC / Contractor |
All Works areas |
Construction phase |
EIA Recommendation |
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Table 5.4 |
Table
4.2 |
Protection
of Registered Old and Valuable
Trees Detailed
tree protection measures as stipulated in WBTC No. 29/2004 – Registration of
Old and Valuable Trees, and Guidelines for their Preservation, shall be
allowed and included in the Contract Specification. All implementation of OVT
protection measures shall be supervised by a landscape specialist on site. |
To protect the OVT within the site boundary |
MTRC / Contractor |
All Works areas |
Construction phase |
WBTC No. 29/2004 EIA Recommendation |
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Table 5.4 |
Table
4.2 |
Protection
of Old Stone Wall-cum-trees Detailed tree protection
specification shall be allowed and included in the Contract Specification,
which specifying the tree protection requirement, submission and approval
system, and the tree monitoring system. All implementation of Old stone
wall-cum-trees protection measures shall be supervised by a landscape
specialist on site. |
To protect the existing trees-cum-wall |
MTRC / Contractor |
All Works areas |
Construction phase |
EIA Recommendation |
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Landscape and Visual
Impact (Operation Phase) |
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Table 5.5 |
Table
4.3 |
Tree
Transplanting Trees
of high to medium survival rate after transplanting to be affected by the works
shall be transplanted where possible and practicable. Tree transplanting
proposal including final location for transplanted trees will be submitted
separately to seek relevant government department’s approval. |
Tree preservation |
MTRC / Contractor |
All Works areas |
Detail design and operation phase |
EIA Recommendation |
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Table 5.5 |
Table
4.3 |
Compensation
Tree Planting Compensatory
tree planting should be provided to compensate for felled trees. Compensatory tree planting proposal
including location of compensation will be submitted separately to seek
relevant government department’s approval. |
To reduce impact to existing trees. |
MTRC / Contractor |
All Works areas |
Detail design and operation phase |
WBTC
no. 3/2006 –Tree Preservation. EIA Recommendation |
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Table 5.5 |
Table
4.3 |
Aesthetic
landscape and architectural treatment on Station / Entrance / vent shaft All
station entrances, vent shafts and all above ground structures shall be
sensitively designed to ensure the element with colour, texture and tonal
quality being compatible to the existing urban context, which shall include
tree planting where space permits, to minimize the potential adverse
landscape and visual impacts. For
example, roof greening and vertical
greening would be applied where possible subject to technical operational and
maintenance constraints. |
To ensure the elements are compatible to the existing
urban context and minimize the landscape and visual impacts. |
MTRC / Contractor |
Stations / Entrances / Vent Shafts |
Detail design and operation phase |
EIA
Recommendation |
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Table 5.5 |
Table
4.3 |
Re-instatement
of excavated Area All
excavated area and disturbed area for utilities diversion, temporary road
diversion, and pipeline woks shall be reinstated to former conditions or even
better, to the satisfaction of the relevant Government departments. |
To minimize the visual impacts. |
MTRC / Contractor |
All Works areas |
Operation phase |
EIA
Recommendation |
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Table 5.5 |
Table
4.3 |
Re-provision
of public open space Every
effort should be made to so that no public open space would be unnecessarily affected by the Project and if affected,
they should be reprovided as far as possible and practicable. Sensitive design and
reprovision of the affected Public Open Space (Forbes Street Playground, Hill
Road Rest Garden, Ki Ling Lane Children’s Playground, Mui Fong Street
Children Playground, Sai Woo Lane Playground, Centre Street Market
Sitting-out Area, King George V Memorial Park) incorporating replacement
facilities for those provided at present, using materials of quality suitable
for long term use and acceptable to relevant Government authority. Relevant government departments
including LCSD and PlanD should be consulted on the design of the
reprovisioned public open spaces at the early stage of the design process. |
Re-provision of landscape amenity
area and facilities |
Contractor |
All Works areas |
Operation phase |
EIA
Recommendation |
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Cultural Heritage
Impact (Construction Phase) |
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S6.45,
S6.51-6.55 |
S 5.4
– 5.11 |
The construction vibration control limits shall be followed. Compliance monitoring of vibration limits shall be conducted and reported as a requirement of EM&A programme The
location and installation of the monitoring stations should be discussed and
agreed with AMO before installation. |
To minimize vibration impacts on the
identified vibration sensitive historical buildings. |
MTRC / Contractor |
All Works Areas |
Detail design, construction and
operational phase |
Antiquities and Monuments Ordinance |
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S6.46 |
S5.3 |
Hoardings or boundary fencing shall be designed in a manner that responds to the existing urban context. |
To minimize visual impacts |
MTRC / Contractor |
All Works Area |
Detailed design and operational phase |
Antiquities and Monuments Ordinance |
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S6.44 |
S5.12-5.14 |
Archaeological watching brief shall be conducted for the identification of any historical finds in the directly impacted works areas which might have a potential for finds and remains of archaeological interest to be found. Details of the frequency of inspection shall be provided to AMO for review and comment once the detailed construction programme has been finalized. The inspection should be carried out by the qualified archaeologist who have applied to the Antiquities Authority for a License |
To indentify any historical finds in the
works areas |
MTRC / Qualified Archaeologist |
Works Area C, H, I, J, J1, J2, J3, M and
M2 |
Construction phase |
Antiquities and Monuments Ordinance |
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Cultural Heritage
Impact (Operation Phase) |
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Table
6.2 |
5.3 |
Aboveground structures shall be designed in a manner that responds to the existing urban context. |
To minimize visual impacts |
MTRC / Contractor |
Stations / Entrances / Vent Shafts |
Detail design and operation phase |
EIA Recommendation |
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S6.60 |
S 5.15 |
Recommended measures for mitigating
operational phase landscape and visual impacts shall be implemented. |
To minimize potential visual impact on
heritage sites |
MTRC / Contractor |
Stations / Entrances / Vent Shafts |
Detail design and operational phase |
EIA Recommendation |
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Waste Management
Implications (Construction Phase) |
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S7.30 |
S 6.5 |
Good site practices -
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 handling procedures -
Provision of sufficient waste disposal points and regular
collection of waste -
Appropriate measures to minimise 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. |
To reduce waste
management impacts |
MTRC / Contractor |
All works areas |
Construction phase |
Practice Note for Authorized
Person and Registered Structural Engineers, Building Department Waste Disposal (Chemical Waste)
(General) Regulation (Cap 354), Land (Miscellaneous Provision) Ordinance (Cap
28); Waste Disposal Ordinance (Cap 354) |
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S7.31 & S7.32 |
S 6.6 – S 6.7 |
Waste reduction measures -
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 work force -
Proper storage and site practices to minimise the
potential for damage or contamination of construction materials -
Plan and stock construction materials carefully to
minimise 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. -
A Waste Management Plan shall be prepared by the
Contractor prior to the commencement of construction work to provide an
overall framework for waste management and reduction. |
To achieve waste
reduction |
MTRC / Contractor |
All works areas |
Construction phase |
Practice Note for Authorized
Person and Registered Structural Engineers, Building Department Waste Disposal (Chemical Waste)
(General) Regulation (Cap 354), Land (Miscellaneous Provision) Ordinance (Cap
28); Waste Disposal Ordinance (Cap 354) |
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S7.34 & S7.35 |
S 6.9 & S6.10 |
C&D Material -
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 shall be reused on-site as
backfilling material 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 -
C&D waste generated site
clearance from the proposed works areas would require disposal to the
designated landfill site. -
In order to monitor the disposal of inert C&D material
and C&D waste at PFRFs and landfills, respectively, and to control
fly-tipping, a trip-ticket system shall be established in accordance with
ETWB TCW No. 31/2004. -
Material delivered to PFRFs should be of size less than |
To minimize
environmental impacts during the handling, transportation and disposal of
C&D material |
MTRC / Contractor |
All works areas |
Construction phase |
ETWB TCW No. 31/2004 ETWB TCW No. 33/2002 ETWB TCW No. 19/2005 |
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S7.36 |
S 6.11 |
General refuse -
General refuse shall be stored in enclosed
bins or compaction units separate from C&D material and chemical
wastes. -
A reputable waste collector shall 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 shall be provided to reduce
the occurrence of 'wind blown' light material. |
To minimize
environmental impacts during the handling, transportation and disposal of
general refuse |
MTRC / Contractor |
All works areas |
Construction phase |
Public Health and Municipal
Services Ordinance (Cap. 132) |
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S7.37 |
S 6.12 |
Chemical waste -
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 shall be used, and incompatible chemicals shall be stored separately. -
Appropriate labels shall be securely attached on each
chemical waste container indicating the corresponding chemical
characteristics of the 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, either to the approved Chemical
Waste Treatment Centre, or another licensed facility, in accordance with the Waste Disposal (Chemical Waste) (General)
Regulation. |
To minimize
environmental impacts during the handling, transportation and disposal of
chemical refuse |
MTRC / Contractor |
All works areas |
Construction phase |
Waste Disposal (Chemical Waste) (General) Regulation Code of Practice on the Packaging, Labelling and Storage
of Chemical Waste |
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Waste Management Implications
(Operation Phase) |
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S7.39 |
S 6.11 |
General Refuse and Industrial Waste §
A
reputable waste collector should be employed to remove general refuse and
industrial wastes from the stations on a daily basis to minimise odour, pest
and litter impacts. |
Storage and handling of
waste |
MTRC |
Stations and entrances |
Operational stage |
Public Health and Municipal
Services Ordinance (Cap. 132) |
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S7.40 |
S 6.12 |
Chemical Waste §
The
requirements given in the Code of
Practice on the Packaging, Labelling and Storage of Chemical Wastes
should be followed in handling of these chemical wastes. §
A
trip-ticket system should be operated in accordance with the Waste Disposal (Chemical Waste) (General)
Regulation to monitor all movements of chemical wastes which would be
collected by a licensed collector to a licensed facility for final treatment
and disposal. §
The
guidelines covered under the construction phase mitigation of chemical wastes
should be referred. |
Storage and handling of
the chemical waste to avoid environmental and health hazard |
MTRC |
Stations and entrances |
Operational stage |
Waste Disposal (Chemical Waste) (General) Regulation Code of Practice on the Packaging, Labelling and Storage
of Chemical Waste |
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Water Quality Impact (Construction
Phase) |
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S9.31 |
S 8.4 |
Construction Site Run-off and Drainage The site practices outlined in ProPECC PN 1/94 “Construction Site
Drainage” should be followed as far as practicable in order to minimise
surface runoff and the chance of erosion. The following measures are recommended
to protect water quality and sensitive uses of the coastal area i.e. WSD
flushing water intakes along the harbour front, and when properly implemented
should be sufficient to adequately control site discharges so as to avoid
water quality impacts: -
The dikes or embankments for flood protection should be
implemented around the boundaries of earthwork areas. Temporary ditches should be provided
to facilitate the runoff discharge into an appropriate watercourse, through a
site/sediment trap. The
sediment/silt traps should be incorporated in the permanent drainage channels
to enhance deposition rates -
Sand/silt removal facilities such as sand/silt traps and
sediment basins shall be provided to remove sand/silt particles from runoff
to meet the requirements of the TM standards under the WPCO. The design of efficient silt removal
facilities shall be based on the guidelines in Appendix A1 of ProPECC PN
1/94, which states that the retention time for silt/sand traps shall be 5
minutes under maximum flow conditions.
Sizes may vary depending upon the flow rate, but for a flowrate of
0.1m3/s a sedimentation basin of 30m3 would be required
and for a flow rate of 0.5 m3/s the basin would be 150m3. The detailed design of the sand/silt
traps shall be undertaken by the contractor prior to the commencement of
construction. -
All drainage facilities and erosion and sediment control
structures shall be regularly inspected and maintained to ensure proper and
efficient operation at all times and particularly during rainstorms. Deposited silt and grit shall be
regularly removed, at the onset of and after each rainstorm to ensure that
these facilities are functioning properly at all times. -
Measures shall be taken to minimize the ingress of site
drainage into excavations. If
excavation of trenches in wet periods is necessary, they should be dug and
backfilled in short sections wherever practicable. Water pumped out from foundation
excavations shall be discharged into storm drains via silt removal
facilities. -
If surface excavation works cannot be avoided during the
wet season (April to September), temporarily exposed slope/soil surfaces
shall be covered by a tarpaulin or other means, as far as practicable, and
temporary access roads shall be protected by crushed stone or gravel, as
excavation proceeds. Interception channels shall be provided (e.g. along the
crest/ edge of the excavation) to prevent storm runoff from washing across
exposed soil surfaces.
Arrangements shall always be in place to ensure that adequate surface
protection measures can be safely carried out well before the arrival of a
rainstorm. Other measures that
need to be implemented before, during and after rainstorms are summarized in
ProPECC PN 1/94. -
The overall slope of the site should be kept to a minimum
to reduce the erosive potential of surface water flows, and all trafficked
areas and access roads protected by coarse stone ballast. An additional
advantage accruing from the use of crushed stone is the positive traction
gained during prolonged periods of inclement weather and the reduction of
surface sheet flows -
All vehicles and plant shall be cleaned before leaving a
construction site to ensure no earth, mud, debris and the like is deposited
by them on roads. An adequately
designed and sited wheel washing facility shall be provided at every
construction site exit where practicable. Wash-water shall have sand and silt
settled out and removed at least on a weekly basis to ensure the continued
efficiency of the process. The
section of access road leading to, and exiting from, the wheel-wash bay to
the public road shall be paved with sufficient backfill toward the wheel-wash
bay to prevent vehicle tracking of soil and silty water to public roads and
drains. -
Open stockpiles of construction materials or construction
wastes on-site should be covered with tarpaulin or similar fabric during
rainstorms. Measures should be
taken to prevent the washing away of construction materials, soil, silt or
debris into any drainage system. -
Manholes (including newly constructed ones) should always
be adequately covered and temporarily sealed so as to prevent silt,
construction materials or debris being washed into the drainage system and
storm runoff being directed into foul sewers. -
Precautions be taken at any time of year when rainstorms
are likely, actions to be taken when a rainstorm is imminent or forecasted,
and actions to be taken during or after rainstorms are summarised in Appendix
A2 of ProPECC PN 1/94. Particular
attention should be paid to the control of silty surface runoff during storm
events, especially for areas located near steep slopes. -
Bentonite slurries used in diaphragm wall construction
shall be reconditioned and reused wherever practicable. Temporary enclosed storage locations
shall be provided on-site for any unused bentonite that needs to be
transported away after all the related construction activities are
completed. The requirements in
ProPECC PN 1/94 shall be adhered to in the handling and disposal of bentonite
slurries. |
To minimize water quality impacts |
MTRC / Contractor |
All works areas |
Construction phase |
ProPECC PN 1/94 Construction Site Drainage |
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S9.32 & S9.33 |
S 8.5 & S 8.6 |
General
Construction Activities
-
Construction solid waste, debris and
refuse generated on-site shall be collected, handled and disposed of properly
to avoid entering any nearby stormwater drain. Stockpiles of cement and other
construction materials shall be kept covered when not being used. Requirements of the solid waste
management are described in Section 7 of this EIA Report.
- Oils and fuels shall only be used and stored in designated areas which have pollution prevention facilities. To prevent spillage of fuels and solvents to nearby stormwater drain, all fuel tanks and storage areas shall be provided with locks and be sited on sealed areas, within bunds of a capacity equal to 110% of the storage capacity of the largest tank. The bund shall be drained of rainwater after a rain event. |
To minimize water quality impacts |
MTRC / Contractor |
All works areas |
Construction phase |
EIA Recommendation |
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S9.34 |
S 8.7 |
Sewage
from Construction Workforce
-
Temporary sanitary facilities, such as
portable chemical toilets, shall be employed on-site where necessary to
handle sewage from the workforce.
A licensed contractor should be employed to provide appropriate and
adequate portable toilets and would be responsible for appropriate disposal
of waste matter and maintenance of these facilities.
|
To minimize water quality impacts |
MTRC / Contractor |
All works areas with on-site sanitary facilities |
Construction phase |
Water Pollution Control Ordinance |
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S9.35 |
S 8.8 |
Tunnelling Wastewater Discharge Wastewater with a high
level of suspended solids should be treated before discharge by settlement in
tanks with sufficient retention time.
Oil interceptors would also be required to remove the oil, lubricants and
grease from the wastewater. In
case of very high levels of suspended solids, an on-site pre-packaged
treatment plant may be required with the addition of flocculants to improve
the settlement of solids. A discharge licence under the WPCO would be required
for discharge to the stormwater drain.
It may be a stipulation of the WPCO licence to require the Contractor
to monitor the quality / quantity of the discharge to show compliance with
the conditions of the licence. |
To minimize water quality impacts |
MTRC / Contractor |
All works areas with tunneling works |
Construction phase |
Water Pollution Control Ordinance |
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S9.36 |
S8.9 |
Groundwater Monitoring Monitoring of groundwater table shall
be conducted on a weekly basis and recharge wells will be installed. |
To control the potential impact on tree walls at |
MTRC / Contractor |
Works Areas C & D |
Construction phase |
EIA Recommendation |
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Water Quality Impact (Operation
Phase) |
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S9.27 |
S8.10-S8.11 |
Runoff from Rail Track
and operational tunnel drainage -
The tunnel wall would be equipped with water-tight liner
and designed for no seepage. -
Standard designed silt trap or grease trap (if necessary)
and oil interceptor would be provided to remove the oil, lubricants, grease,
silt and grit from the tunnel runoff before discharge into stormwater
drainage. |
To control runoff from rail track and tunnel seepage |
MTRC |
Tunnels and rail tracks |
Operation phase |
Water Pollution Control Ordinance |
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S9.37 |
S8.12-S8.14 |
-
Track drainage channels discharge should pass through
oil/grit interceptors/chambers to remove oil, grease and sediment before
being pumped to the public stormwater drainage system. -
The silt traps and oil interceptors should be cleaned and
maintained regularly. -
Oily contents of the oil interceptors should be
transferred to an appropriate disposal facility, or to be collected for
reuse, if possible. |
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S9.27 |
S8.15-S8.16 |
Sewage from Station -
Sewage and wastewater effluents generated from the staff
at stations and food and beverage outlets, if any, would be connected to the
existing foul sewerage system. -
Runoff from cleaning activities at the stations which
would enter floor drains would also be connected to the foul sewer. |
To control sewage from stations |
MTRC |
WIL Stations |
Operation phase |
Water Pollution Control Ordinance |
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Hazard to Life |
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S10 |
S10.1 |
Blasting activities regarding transport,
storage and use of explosives should be supervised and audited by competent
site staff to ensure strict compliance with the blasting permit conditions. |
To ensure that the risks from
the proposed explosives storage, handling and transport would be acceptable |
MTRC / Contractor |
Works areas at which explosives would be stored and/or
used. |
Construction phase |
Dangerous Goods Ordinance |
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S10 |
S10.1 |
Delivery vehicles shall not be
permitted to remain unattended within the magazine. In addition, they shall not be allowed
to park overnight, or when not in use, within the magazine and its audits |
To reduce the risk of fire
within the magazine |
MTRC / Contractor |
Explosive Magazine |
Operational phase |
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S10 |
S10.1 |
Blast doors or heavy duty blast
curtains should be installed at the access adits and shafts to prevent
flyrock, and control the air over-pressure |
To reduce the risk of injury due
to flyrock during the WIL construction |
MTRC / Contractor |
At suitable locations, access adits and shafts |
Construction phase |
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S10 |
S10.1 |
Detonators shall not be transported
in the same vehicle with other Class 1 explosives |
To reduce the risk of explosion
during the transport of cartridged emulsion |
MTRC / Contractor |
- |
Construction phase |
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Air Quality
(Construction Phase) |
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Table 11.6 |
Table 9.5 |
Rock Crushing Plants The
unloading process would be undertaken within enclosed rock crushing facility.
Water spraying would be provided at the unloading
point. The crushing process is the secondary
crushing. The rock crushing
plant is enclosed and water spraying system would be installed. Dust extraction and collection system
with 80% dust removal efficiency would be provided. The crushed stone/rock would be screened by the screening and sorting facility before transporting to the temporary stockpile via enclosed conveyor. Water spraying system would be installed. Dust extraction and collection system with 80% dust removal efficiency would be provided. |
To minimize dust impacts |
MTRC / Contractor |
Rock crushing plants at works areas B and E |
Construction phase |
Air Pollution Control Ordinance Guideline Note on the Best Practicable Means for Mineral
Works (Stone Crushing Plants) BPM 11/1 |
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Table 11.7 |
Table 9.6 |
Temporary Stockpiles Loading
point – Loading of crushed materials from rock crushing facility onto
stockpile -
The transportation would be via an enclosed conveyor belt
system and water spraying and flexible dust curtains would be provided at the
loading point to suppress the dust impact. Storage of materials - Active area for loading & unloading materials -
The active area would be minimized to 20% of the total
area of the stock piles. The 80%
inactive area would be well covered with impervious sheeting. Water spraying system would be applied
on the active area and watering with complete coverage of
active area four times a day would be required. Transportation of materials to Barging Point 1 -
Wheel wash facilities provided at the site exit. The
vehicles would be washed before leaving the stockpiles. The spoils would also be well covered
before leaving the site in order to minimise generation of dusty materials. -
The haul roads within the site would be all paved and
water spraying would be provided to keep the wet condition. Loading
point – Loading of crushed materials from rock crushing facility onto
stockpile -
The transportation would be via an enclosed conveyor belt
system and water spraying and flexible dust curtains would be provided at the
loading point to suppress the dust impact. Storage of materials - Active area for loading & unloading materials -
Water spraying system would be applied on the active area and watering with complete of active area four times a day would be
required. Transportation of materials to Barging Point 2 -
The vehicles would be washed before leaving the
stockpiles. The spoils would also
be well covered before leaving the site in order to minimise generation of
dusty materials. -
The haul road would be paved and water
spraying would be provided to keep the wet condition |
To minimize dust impacts |
MTRC / Contractor |
Temporary stockpiles at works areas B and E |
Construction phase |
Air Pollution Control Ordinance |
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Table 11.8 |
Table 9.7 |
Barging Facilities Transportation of spoils to Barging Point 1 -
All road surfaces within the barging facilities would be
paved and water spraying would be provided to keep the wet
condition. Unloading of spoil materials -
The unloading process would be undertaken within enclosed
tipping hall. Flexible dust
curtains and water spraying would be provided at the discharge point for dust
suppression. Vehicles leaving the
barging facility -
Vehicle wheel washing facilities provided at site exit Transportation of spoils to Barging Point 2 -
All road surfaces within the barging facilities would be
paved and water spraying would be provided to keep the wet
condition. Unloading of spoil materials from trucks to
Barging Point 2 -
The unloading process should be
undertaken within the enclosed tipping hall. Flexible dust curtains and water
spraying would be provided at the discharge point for dust suppression. Unloading of spoil materials from enclosed
tipping hall to Barging Point 3 -
The tipping hall would be enclosed structure. The conveyor from tipping hall to the
Barging Point 3 would be enclosed. Water spraying and flexible dust
curtains would be provided at the receiving point of the tipping hall. Flexible dust curtains and water
spraying would be provided at the discharge point of barging facilities for
dust suppression. Vehicles leaving the
barging facility -
Vehicle wheel washing facilities provided at site exit |
To minimize dust impacts |
MTRC / Contractor |
Barging points at works areas B and E |
Construction phase |
Air Pollution Control Ordinance |
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Table 11.9 |
S 9.26 |
Rock Crushing Plant at -
Dust extraction and collection system (80% dust removal efficiency)
should be installed at the rock crushing facility and the discharge point is located
at least |
To minimize dust impacts |
MTRC / Contractor |
Rock Crushing Plant at works area B - Kennedy Town
Abattoir Site |
Construction phase |
Air Pollution Control Ordinance Guidance Note on the Best Practicable Means for Mineral
Works (Stone Crushing Plants) BPM 11/1 |
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Table 11.10 |
S 9.27 |
Works
areas at KET station construction site Active operating area of 50% Watering four times a day with complete coverage of active construction area |
To minimize dust impacts |
MTRC / Contractor |
Works area A, C and D |
Construction phase |
Air Pollution Control Ordinance |
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Table 11.10 |
S9.27 |
Open
work areas at temporary magazine site Active
operating area of 50% Watering
two times a day with complete coverage of active construction area |
To minimize dust impacts |
MTRC / Contractor |
Open works area at magazine site |
Construction phase |
Air Pollution Control Ordinance |
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S 11.42 |
S 9.28 |
For both rock crushing
plants, the requirements and mitigation measures stipulated in the Guidance Note on the Best Practicable Means for
Mineral Works (Stone Crushing Plants) BPM 11/1 should be followed and implemented. |
To minimize dust impacts |
MTRC / Contractor |
Rock crushing plants |
Construction phase |
APCO |
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S 11.42 |
S 9.28 |
Dust
suppression measures stipulated in the Air Pollution Control (Construction
Dust) Regulation and good site practices: -
Use of regular watering, with complete coverage, to reduce
dust emissions from exposed site surfaces and unpaved roads, particularly
during dry weather. -
Use of frequent watering for particularly dusty
construction areas and areas close to ASRs. -
Side enclosure and covering of any aggregate or dusty
material storage piles to reduce emissions. Where this is not practicable owing to
frequent usage, watering shall be applied to aggregate fines. -
Open stockpiles shall be avoided or covered. Where possible, prevent placing dusty
material storage piles near ASRs. -
Tarpaulin covering of all dusty vehicle loads transported
to, from and between site locations. -
Establishment and use of vehicle wheel and body washing
facilities at the exit points of the site. -
Provision of wind shield and dust extraction units or
similar dust mitigation measures at the loading points, and use of water
sprinklers at the loading area where dust generation is likely during the
loading process of loose material, particularly in dry seasons/ periods. -
Imposition of speed controls for vehicles on unpaved site
roads. 8 kilometers per hour is
the recommended limit. -
Where possible, routing of vehicles and positioning of
construction plant shall be at the maximum possible distance from ASRs. -
Every stock of more than 20 bags of cement or dry
pulverised fuel ash (PFA) shall be covered entirely by impervious sheeting or
placed in an area sheltered on the top and the 3 sides. -
Cement or dry PFA delivered in bulk shall be stored in a
closed silo fitted with an audible high level alarm which is interlocked with
the material filling line and no overfilling is allowed. -
Loading, unloading, transfer, handling or storage of bulk
cement or dry PFA shall be carried out in a totally enclosed system or
facility, and any vent or exhaust shall be fitted with an effective fabric
filter or equivalent air pollution control system. |
To minimize dust impacts |
MTRC / Contractor |
All works areas |
Construction phase |
Air Pollution Control Ordinance and Air Pollution Control
(Construction Dust) Regulation |
Table
14.2 Implementation
Schedule Specific for Works Area MA - Underground Magazine Site
EIA Ref. |
EM&A
Ref. |
Recommended
Mitigation Measures |
Objectives
of the Recommended Measure & Main Concern to Address |
Who to
implement the measure? |
Location
of the measure |
When to
implement the measure? |
Reference
|
Ecological Impact
(Construction Phase) |
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App.2.3 – S. 6.1 |
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Proposed works shall be
designed to avoid or minimize direct impacts to natural habitats in the works
area wherever possible. |
To protect the natural
habitats in the works area |
MTRC / Contractor |
Works Area MA |
Design and construction of the magazine site |
EIA Recommendation |
App.2.3 – S. 6.2 |
|
Planting of vegetation shall be provided to compensate for
the unavoidable loss of tall shrubland and woodland habitats. It shall be
provided to re-vegetate the areas which would be 1m beyond the security
fencing and temporarily affected by the construction works (e.g. slope works,
erecting security fence) after the construction phase. The plant species selected for
re-vegetation shall make reference to the existing habitats. |
To compensate for the
ecological impacts associated with the loss of vegetation |
MTRC / Contractor |
Works Area MA |
Construction phase of the magazine site |
EIA Recommendation |
App.2.3 – S. 6.2 |
|
Suitable plants, preferably with native species, shall be
planted within the boundary of the completed magazine site to compensate for
unavoidable loss of understorey vegetation resulting from the proposed works
on-site after the decommissioning of the magazine site. The compensatory planting shall make
use of native plant species with flowers/fruits to attract wildlife. |
To compensate for the
ecological impacts associated with the loss of vegetation |
MTRC / Contractor |
Works Area MA |
After completing the construction of the magazine site |
EIA Recommendation |
App.2.3 – S. 6.3 |
|
The two individuals of Hong Kong Pavetta (Pavetta hongkongensis) located within
the footprint of the proposed tunnel portal and access entrance shall be
transplanted to a suitable nearby tall shrubland or woodland habitats.
Transplantation shall be supervised by a suitably qualified
ecologist/horticulturalist |
To protect the 2
species from the proposed works within the works area |
MTRC / Contractor |
Works Area MA |
Prior to the construction phase of the magazine site |
EIA Recommendation |
App.2.3 – S. 6.4 |
|
The
trees located within the works area shall be preserved as far as practicable. If tree felling is unavoidable,
feasibility of tree transplantation and compensatory planting shall be
explored shall be implemented. |
To protect the existing
trees within the works area |
MTRC / Contractor |
Works Area MA |
Prior to the construction phase of the magazine site |
EIA Recommendation |
App.2.3 – S. 6.5 |
|
All the
existing trees and species of conservation importance (i.e. the two
identified Silver-back Artocarpus, Artocarpus
hypargyreus) located near the proposed works site shall be fenced off and
the trunk shall be protected with hessian sacking as far as possible. |
To protect the existing
trees and the species of conservation importance near the works area |
MTRC / Contractor |
Works Area MA |
Construction and operation phase of the magazine site |
EIA Recommendation |
App.2.3 – S. 6.6 |
|
Noise control measures
including the use of quiet excavation methods, quiet construction plant and
temporary noise barriers shall be implemented |
To minimize the noise disturbance to the wildlife near the works area |
MTRC / Contractor |
Works Area MA |
Construction and operation phase of the magazine site |
EIA Recommendation |
App.2.3 – S. 6.7 |
|
Standard good site practice
measures shall be implemented, including ·
Placement of equipment or stockpile in designated works
areas and access routes selected on existing disturbed land to minimise
disturbance to natural habitats. ·
Construction activities should be restricted to work areas
that would be clearly demarcated. The work areas should be reinstated after
completion of the works. ·
Waste skips should be provided to collect general refuse
and construction wastes. The wastes would be disposed of timely and properly
off-site. ·
General drainage arrangements should include sediment and
oil traps to collect and control construction site run-off. ·
Open burning on works sites is illegal, and should be
strictly prohibited. |
To minimize ecological impacts |
MTRC / Contractor |
Works Area MA |
Construction and operation phase of the magazine site |
EIA Recommendation |
Table
14.3 Implementation
Schedule Specific for Works Area B –
Recommended
Mitigation Measures |
Objectives
of the Recommended Measure & Main Concern to Address |
Who to
implement the measure? |
Location
of the measure |
When to
implement the measure? |
Reference
|
The existing ground slab/pavement within the works area shall be kept intact. |
To minimize human
health risk associated with the contaminated soil and groundwater in the
works area. |
MTRC / Contractor |
Works Area B |
Construction phase |
ER for VEP Recommendation |
A reinforced concrete paving of no less than |
To minimize human health risk
associated with the contaminated soil and groundwater in the works area. |
MTRC / Contractor |
Works Area B |
Construction phase |
ER for VEP Recommendation |
Monthly site inspection shall be conducted to
ensure the integrity of the existing and/or the new paving layer. Any surface cracks identified shall be
filled out such that underneath soil would not be exposed. |
To minimize human health risk
associated with the contaminated soil and groundwater in the works area. |
MTRC / Contractor |
Works Area B |
Construction phase |
ER for VEP Recommendation |
A
clear void between the structure slab of the site office and the ground
surface shall be created, i.e. the site office is a raised structure. |
To allow ventilation by natural
air movements to dilute the contaminant vapour released from the soil and
groundwater. |
MTRC / Contractor |
Works Area B |
During the construction of the site offices |
ER for VEP Recommendation |
Incorporate
gas-resistant membranes into the raised floor of the site office. |
To prevent contaminant vapour
under the floor slab from entering the site office to protect the staff
working in the site office. |
MTRC / Contractor |
Works Area B |
During the construction of the site offices |
ER for VEP Recommendation |
Site
hoardings shall be erected around the works area, and they shall be properly
maintained to restrict access of trespassers. |
To protect the trespassers from
the contaminated soil and groundwater in the works area. |
MTRC / Contractor |
Works Area B |
Construction phase |
ER for VEP Recommendation |