CONTENTS
12 SUMMARY OF ENVIRONMENTAL OUTCOMES
12.2 Summary of Environmental Benefits and Environmental
Achievements of the
Project
12.3 Environmental Benefits of Environmental Protection
Measures Recommended
12.4 Estimated Population Protected from Various
Environmental Impacts
TABLES
Table 12.1 Key
Design Considerations and the Associated Environmental Benefits
12.1.1
This chapter summarises
the overall environmental outcomes due to the construction and operation of the
Project in accordance with Section 3.6.1 of the EIA Study Brief (No.: ESB-342/2021). The Project was given consideration of
alternative options based on findings from various engineering and
environmental reviews. Chapter 2 outlines
the details and benefits of the Project, as well as the consideration of
alternatives during the design stage. By implementing suitable measures
to satisfy all statutory requirements, all preferred options considered and
ensured that environmental impacts could be avoided or minimised,
as practicable, and mitigated, as necessary. The technical assessments conducted in
Chapters 3 to 10 have demonstrated that all the statutory requirements in the
EIA Study Brief (No.: ESB-342/2021) and EIAO-TM have been complied with.
12.1.2
The following sections summarise
the environmental outcomes arising from this EIA study, the approaches that
have been adopted to either avoid or minimise various
environmental impacts throughout the design process, and the associated
environmental enhancement and mitigation measures.
12.2.1
As described in Section 2.5, avoidance or minimization of the environmental
impacts have been one of the key considerations throughout the design of the Project.
The key design considerations and
the associated environmental benefits for different design approaches are
discussed below.
12.2.2
The key environmental benefits achieved by selected
the preferred option are listed below.
l
Minimisation of the need for land reclamation;
l
Avoidance of excavation works at Scenic Hill for
the ATCL alignment;
l
Minimisation of waste generation;
l
Minimisation of noise
disturbance and air quality impact during construction;
l
Avoidance of encroaching into the marine park and
ecological sensitive area; and
l
Avoidance of open sea dredging works during
construction works.
12.2.3
The key environmental
benefits and achievements of the Project are listed below.
l
Adoption of environmentally friendly construction
methods;
l
Promote the use of environmentally friendly vehicle
system; and
l
Reduce vehicular emissions.
12.2.4
They key environmental benefits achieved by
selected the preferred option are listed in Table 12.1 below.
Table 12.1
Key Design Considerations and the Associated Environmental Benefits
|
Design Approach |
Key Design Considerations
and the Associated Environmental Benefits |
|
Minimisation of the need for land reclamation (see details in
Section 2.5.1.5) |
l
During the planning and design stage, the ATCL
alignment is designed to minimise land reclamation
works l
Minimising the need for land reclamation while maximise the ATCL at-grade section. |
|
Avoidance of excavation works at Scenic Hill for
the ATCL alignment (see details in Section 2.5.1.6) |
l
The preferred option does not require
excavation works at Scenic Hill for the ATCL alignment to avoid the loss of
habitat of Romer’s Tree Frog. l
Minimising the waste generation from excavated materials. |
|
Minimisation of waste generation (see details in Section 2.5.1.7) |
l
The preferred alignment option maximises the use of at-grade roads instead of elevated
roads to minimize the waste generated from the construction of additional
structures for elevated road. |
|
Avoidance of encroaching into the marine park and
ecological sensitive area (see details in Section 2.5.3.2) |
l
Locating
the marine facilities away from the Proposed North Lantau Marine Park and
ecologically sensitive area (e.g. the artificial reef at the Chek Lap Kok
Marine Exclusion Zone). |
|
Avoidance of open sea dredging works during
construction (see details in Sections 2.5.3.2, 2.6.1.6 & 2.7.2.5) |
l
No open sea dredging works is required for the
Project by strategically locate the marine facilities between the Airport
Island and HKP Island. l
Avoid direct impacts on the marine ecological
resources and fisheries impact. |
|
Adoption of
environmentally friendly construction method (see details in Section 2.5.4.1) |
l
Minimisation of construction noise and vibration impact to
the nearby Chinese
White Dolphins and marine species for the pile construction through the quieter
piling method (e.g. bored piling method). |
|
Promote the use of environmentally friendly
vehicle system (see details in Section 2.5.1.4) |
l
The use of zero emission vehicles during
operational phase can help improve roadside air quality. |
12.3.1
A detailed assessment and identification of site
constraints and impacts, as well as mitigation measures and good site
practices, have been conducted and recommended in the EIA study in order to further
reduce the environmental impacts due to the Project. The key good site practices,
enhancement measures, mitigation measures and their associated benefits are summarised in Table 12.2.
Table 12.2
Key Environmental Mitigation Measures / Good Site Practices /
Enhancement Measures and their Associated Benefits
|
Area/Issue |
Key Recommended Mitigation
Measures/ Good Site Practices/ Enhancement Measures |
Associated Benefits |
|
Air Quality |
Construction Phase: ·
Implementation of sufficient dust
control measures as stipulated under the APCO, Air Pollution Control
(Construction Dust) Regulation (Cap 311R) and good site practices to minimise
construction dust impact. ·
Watering regularly on heavy
construction works sites, exposed site surfaces and unpaved haul roads to
reduce dust emission by 91.7%, subject to actual site condition. ·
Adoption of liquid fuel with a sulphur
content of not more than 0.005% by weight as stipulated under Air Pollution
Control (Fuel Restriction) Regulation and good site practices to minimise
emission from construction plant and equipment. ·
Adoption of locally supplied marine
light diesel (MLD) with sulphur content of not more than 0.05% by weight as
stipulated under Air Pollution Control (Marine Light Diesel) Regulation to
minimise SO2 emission from construction vessels. Operational Phase: ·
100% adoption of zero emission vehicles
on the whole of the ATCL route. ·
Installation of electricity pedestal at
each berthing facilities for use in order to
minimise the vessel emissions. |
·
Protect
Air Sensitive Receivers (ASRs) by reducing fugitive dust and gaseous emissions
during construction phase, and by minimizing vehicular and marine emissions
during operational phase. |
|
Noise |
Construction Phase: ·
Implementation
of mitigation measures such as good site practices, use of quieter Powered Mechanical
Equipment (PME), noise insulating fabric, noise barrier and noise enclosure
to screen noise from PMEs, and use of quieter construction methods including
hydraulic concrete crusher, non-explosive chemical expansion agent,
self-compacting concrete and silent piling by Press-in Method. ·
Construction
Noise Management Plan(s) (CNMP) with reference to Section 8 and Annex 21 of
the EIAO-TM should be prepared to submit during pre-tender stage, if any, and
before commencement of construction works, so that both the verification of
the inventory of noise sources, and the assessment of the effectiveness and
practicality of all identified measures for mitigating the construction noise
impact of the Project, would be performed during the design, tendering and implementation
stage of the construction works.
A clear method statement of all the recommended mitigation measures
for controlling the construction noise impacts should be formulated in the
CNMP(s) to be prepared by future Contractors, such that all the recommended
mitigation measures shall be implemented and executed properly. ·
Good
site practices are recommended during construction phase. Measures include: -
Only
well-maintained plant should be operated on-site and plants should be
serviced regularly during the construction period; -
Mobile
plant, if any, should be sited as far from NSRs as possible; -
Plant
known to emit noise strongly in one direction should, wherever possible, be
properly orientated so that the noise is directed away from the nearby NSRs; -
Use
of site hoarding as a noise barrier to screen noise at low level NSRs; -
Machines
and plant that may be used intermittently should be shut down between works
periods or should be throttled down to a minimum; and -
Any
material stockpiles and other structures should be effectively utilised,
wherever practicable, to screen the noise from on-site construction
activities. Operational Phase: ·
A
noise commissioning test of the zero emission vehicles should be carried out
prior to operation, and the Sound Power Level (SWL) should be 100dB(A) or
below. |
·
Protect
Noise Sensitive Receivers (NSRs) by reducing construction and operational noise. |
|
Water Quality |
Construction Phase: ·
Limited
the maximum number of piles allowed for concurrent installation for marine
viaduct (max.: 2 piles to be installed concurrently) and marine facilities
(max.: 2 piles to be installed concurrently). Also, silt curtain should be set up to
enclose the entire active work area before construction of temporary working
platforms and piling works for marine facilities and marine viaduct to
control sediment dispersion. ·
Implementation
of appropriate measures and good site practices in accordance with the
guidelines stipulated in Water Pollution Control Ordinance (WPCO), Technical
Memorandum for Effluents Discharged into Drainage and Sewerage Systems,
Inland and Coastal Waters (TM-ICW) and Practice Note for Professional
Persons, Construction Site Drainage (ProPECC
PN1/94). ·
Adoption
of proper site management and good housekeeping practices to minimise the potential water quality impact due to
spillage events. Operational Phase: ·
Deployment
of cage type silt curtain during maintenance dredging. It is also recommended to limit the
maximum working rate for maintenance dredging to be 40m3 per hour
and only one closed grab dredger will be working in any time. ·
Implementation
of other good site practices implemented during construction phase for marine
construction works for maintenance dredging during operational phase. ·
Adoption
of proper site management and good housekeeping practices to minimise the potential water quality impact due to
spillage events. ·
Regular
cleaning and removal of floating refuse should be conducted within marine
water and coastal area within and around the Project to avoid excessive accumulation. Also, any new drainage outfall(s)
under this Project will be located outside of the marine facilities. ·
A
surface water drainage system of the ATCL should be provided to collect road
runoff to the new drainage system with new stormwater outfall and adequate designed pollution removal devices such as silt
trap and, as necessary, oil/grease trap, which should be regularly cleaned
and maintained to ensure proper functioning. |
·
Protect
the neighbouring Water Sensitive Receivers (WSRs)
during construction and operational phase. |
|
Waste Management |
·
Implementation
of a WMP, segregation waste to avoid cross-contamination, transporting inert
waste to public fill reception facilities and recycle non-inert C&D
material. ·
Implementation
of good waste management and control practices to avoid generation of
excessive amount of waste materials.
The marine sediment is expected to be excavated and reuse option is
considered as far as possible. ·
Implementation
of a trip-ticket system for each works contract in accordance with DevB TC(W) No. 6/2010 to ensure that the disposal of
C&D materials are properly documented
and verified. ·
Implementation
of suitable mitigation measures, such as the requirements as stipulated in
the ADV-19. ·
Handle
chemical waste in accordance with the Code of Practice on the Packaging,
Labelling and Storage of Chemical Wastes, and disposal of chemical waste at
licensed chemical waste recycling / treatment facilities. ·
Excavation,
treatment, transportation and disposal of sediments in accordance with the
Air Pollution Ordinance (Construction Dust) Regulation. ·
For
off-site disposal of excavated marine sediments, the basic requirements and
procedures specified under ADV-21 shall be followed. ·
Application
of marine dumping permit under the Dumping at Sea Ordinance for marine
sediment disposal. ·
GPS
or equivalent systems will be equipped to all dump trucks for real-time
tracking and monitoring of transportation of inert C&D materials to
designated locations. |
·
Minimise
waste generation. ·
Ensure
proper handling of chemical waste. ·
Avoid
potential adverse environmental impacts associated with handling, collection
and disposal of waste. ·
Ensure
the C&D materials are disposed to the designated outlets. |
|
Ecology (Marine) |
Construction Phase: ·
All
vessels used in this Project will be required to slow down to 10 knots around
the Project’s marine works areas and areas
with potential high dolphin usage, including existing and proposed marine
parks. ·
Implementation
of standard site management practices, water quality mitigation measures, and
vessel speed restriction as a precautionary measure during the construction
and operation of the Project would reduce impacts. Operational Phase: ·
Deployment
of silt curtain during maintenance dredging and good site practice, are expected
to mitigate impacts to marine ecological resources. All vessels used in this
Project will be required to slow down to 10 knots around the Project’s marine
works areas and areas with potential high dolphin usage, including existing
and proposed marine parks. |
·
Minimise
the impact on impacts on marine ecological resources and marine parks. |
|
Ecology (Terrestrial) |
Construction Phase: ·
Adoption
of good site practice to minimise the indirect
disturbances to surrounding habitats and associated wildlife. Operational Phase: ·
Precautionary
measures are recommended with respect to water quality control and
disturbance to adjacent wildlife in order to further reduce the impacts. |
·
Minimise
the potential indirect disturbances to surrounding habitat and associated wildlife. |
|
Fisheries |
Construction Phase ·
Water
Quality Impact Assessment mitigation measures will be sufficient to mitigate
the impact on fisheries (e.g.
Deployment of cage-type silt curtain during construction, good site
practice. ·
No addition mitigation measure
is required. Operational Phase: ·
Deployment
of silt curtain during maintenance dredging and good site practice, are
expected to mitigate impacts to fisheries. ·
Appropriate
notification, communications, site protection and marking would be adopted to
reduce navigation risks with fishing vessels. ·
No
fisheries-specific mitigation measures are required. |
·
Minimise
the impact on fisheries resources during construction and operational phase. |
|
Cultural Heritage |
·
No cultural heritage
mitigation measures and further MAI are required. ·
As a precautionary
measure, the project proponent and his/her contractor are required to inform
AMO immediately when any antiquities or supposed antiquities under the
Antiquities and Monuments Ordinance (Cap 53) are discovered during the seabed
disturbance works in the Project site. |
·
Verify
the presence of marine archaeology. |
|
Landscape and Visual |
Construction Phase: ·
CM1 - Preservation of
Existing Trees and Other Vegetation ·
CM2 - Transplanting of
Affected Trees ·
CM3 - Compensatory Tree
Planting ·
CM4 - Control of
Night-time Lighting Glare ·
CM5 - Erection of
Decorative Screen Hoardings ·
CM6 - Management of
Construction Activities and Facilities ·
CM7 - Reinstatement
of Temporarily Disturbed Landscape Areas Operational Phase: ·
OM1 - Aesthetically
Pleasing Design of Aboveground / Above Sea Structures ·
OM2 - Provision of
Amenity Planting and Landscape Features |
·
Minimise
landscape and visual impact during construction and operational phases. |
12.4.1
Through the avoidance and/or minimization of
environmental impacts surrounding the Project
site, population and environmental sensitive areas have been protected from the construction and operation of the Project.
12.4.2
The protected
populations include the following:
·
Existing ASRs and/or
NSRs at Offices at Hong Kong Port Passenger Crossing Building, AsiaWorld-Expo, Hong Kong SkyCity
Marriott Hotel, Regala SkyCity
Hotel, SkyPier, Hong Kong Airlines Training Academy,
Cathay City, Seaview Crescent, Novotel Citygate Hong Kong, Ling Liang Church E
Wun Secondary School, Ling Liang Church Sau Tak Primary School, One Citygate,
Fu Tung Plaza, Ching Chung Hau Po Woon Primary
School, Po On Commercial Association Wan Ho Kan Primary School, Tung Chung
Crescent, Fu Tung Estate and Yu Tung Court by implementation of good site
practices during the construction phase of the Project;
·
Planned ASRs and/or
NSRs at the Planned Visitation Church Development, Campus and Dormitory of the
Hong Kong International Aviation Academy, Offices SkyPier
Terminal, 11 SKIES and Planned Commercial Use by implementation of good site
practices during the construction phase of the Project; and
·
All existing and
planned ASRs and/or NSRs as mentioned above during the operational phase of the
Project.