Table
13.1 Implementation
Schedule for Air Quality Control
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EIA Ref
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Environmental Protection Measures /
Mitigation Measures |
Location / Timing |
Implementation Agent |
Implementation Stages* |
Relevant Legislation and Guidelines |
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Dec |
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Construction Phase |
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S |
Four
times a day watering of the work site with active operations. |
Work site / during construction |
Contractor |
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Ö |
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EIAO-TM |
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S |
Implementation
of dust suppression measures stipulated in Air Pollution Control
(Construction Dust) Regulation.
The following mitigation measures, good site practices and a
comprehensive dust monitoring and audit programme are recommended to minimise
cumulative dust impacts. ·
Strictly
limit the truck speed on site to below ·
Watering
during excavation and material handling; ·
Provision
of vehicle wheel and body washing facilities at the exit points of the site,
combined with cleaning of public roads where necessary; and |
Work site / during construction |
Contractor |
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Ö |
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·
Tarpaulin
covering of all dusty vehicle loads transported to, from and between site
locations. |
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S |
For the dredging
activities carried out in the vicinity of Police Officers’ Club, the dredging
operation will be restricted to only 1 small close grab dredger to minimise
the odour impact during the dredging activity. The dredging rate should be reduced as
much as practicable for the area in close proximity to the Police Officers’
Club. The sediments contain
highly contaminated mud which may be disposed with the use of geosynthetic
containers (details shall refer to Section 6), grab dredger has to be used
for filling up the geosynthetic containers on barges. the dredging rate for the removal of
the sediments at the south-west corner of the typhoon shelter shall be slowed
down or restricted to specific non-popular hours in weekdays when it is
necessary during construction. |
Corner
of CBTS/implementation of harbour-front enhancement |
CEDD[1] |
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Ö |
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EIAO-TM |
* Des - Design, C - Construction, O
– Operation, and Dec - Decommissioning
Table 13.2 Implementation
Schedule for Noise Control
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EIA Ref |
Environmental Protection Measures / Mitigation Measures |
Location / Timing |
Implementation Agent |
Implementation Stages* |
Relevant Legislation and Guidelines |
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Des |
C |
O |
Dec |
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Construction Phase |
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Good Site
Practice: Ÿ
Only
well-maintained plant shall be operated on-site and plant shall be serviced
regularly during the construction program. Ÿ
Silencers
or mufflers on construction equipment shall be utilized and shall be properly
maintained during the construction program. Ÿ
Mobile
plant, if any, shall be sited as far away from NSRs as possible. Ÿ
Machines
and plant (such as trucks) that may be in intermittent use shall be shut down
between works periods or shall be throttled down to a minimum. Ÿ
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. Ÿ
Material
stockpiles and other structures shall be effectively utilized, wherever
practicable, in screening noise from |
Work Sites / During Construction |
Contractor |
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Ö |
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EIAO-TM, NCO |
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S |
Use of
quiet powered mechanical equipment
for the following task: ·
Filling behind seawall ·
Seawall construction |
Work Sites / During Construction |
Contractor |
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Ö |
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EIAO-TM, NCO |
* Des - Design, C - Construction, O
– Operation, and Dec - Decommissioning
Table 13.3 Implementation
Schedule for Water Quality Control
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EIA Ref |
Environmental Protection Measures / Mitigation Measures |
Location / Timing |
Implementation Agent |
Implementation Stages* |
Relevant Legislation and Guidelines |
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Des |
C |
O |
Dec |
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Construction Phase |
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S5.8 |
A phased reclamation approach is planned for the WDII. Containment of fill within each of the reclamation phases by seawalls is proposed, with the seawall constructed first (above high water mark) with filling carried out behind the completed seawalls. Any gaps that may need to be provided for marine access will be shielded by silt curtains to control sediment plume dispersion away from the site. Filling for seawall construction should be carried out behind the silt curtain |
Work site
/ During the construction period |
Contractor |
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Ö |
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EIAO-TM, WPCO |
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S5.8 |
Dredging shall be carried out by closed grab dredger for the following works: · Seawall construction in all the reclamation areas; · Construction of the CWB Tunnel · Construction of the proposed WSD water mains; and · Construction of the proposed Wan Chai East sewage outfall pipelines. |
Work site
/ During the construction period |
Contractor |
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Ö |
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EIAO-TM, WPCO |
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S5.8,
Figure 5.3 |
Dredging for the Wan Chai East sewage outfall pipelines shall not be carried out concurrently with the following activities: · Dredging along the proposed WSD water mains; · Dredging along the seawall in the Wan Chai Reclamation (WCR) zone (area between HKCEC Extension and PCWA). |
Work site
/ During the construction period |
Contractor |
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Ö |
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EIAO-TM, WPCO |
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S5.8 |
The water body behind the
temporary reclamations within the
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Work site
/ During the construction period |
Contractor |
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Ö |
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EIAO-TM, WPCO |
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S5.8 |
As a mitigation measure, to avoid
the accumulation of water borne pollutants within the temporary embayment between
CRIII and HKCEC1, an impermeable barrier, suspended from a floating boom on
the water surface and extending down to the seabed, will be erected by the
contractor before the HKCEC1 commences.
The barrier will channel the stormwater discharge flows from Culvert L
to the outside of the embayment.
The contractor will maintain this barrier until the reclamation works
in HKCEC2W are carried out and the new Culvert L extension is constructed.
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Work site
/ During the construction period |
Contractor |
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Ö |
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EIAO-TM, WPCO |
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S5.8,
Figure 5.3 |
The total dredging rates in each of the marine works zones shall not be more than the maximum production rates stated in the table below. These are the production rates without considering the effect of silt curtain.
Note: |
Work site
/ During the construction period |
Contractor |
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Ö |
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EIAO-TM, WPCO |
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S5.8,
Figure 5.3 |
Dredging
along the seawall at WCR1 shall be undertaken initially at |
Work site
/ During the construction period |
Contractor |
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Ö |
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EIAO-TM, WPCO |
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S5.8,
Figure 5.3 |
For dredging within the |
Work site
/ During the construction period |
Contractor |
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Ö |
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EIAO-TM, WPCO |
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S5.8,
Figure 5.3 |
Silt curtains shall be deployed around the closed grab dredgers during seawall dredging and seawall trench filling in the areas of HKCEC, WCR, TCBR and NP. |
Work site
/ During the construction period |
Contractor |
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Ö |
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EIAO-TM, WPCO |
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S5.8, Figure
5.3 |
Silt screens shall be applied to seawater intakes at interim construction stages as stated below:
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Work site
/ During the construction period |
Contractor |
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Ö |
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EIAO-TM, WPCO |
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S5.8 |
Other mitigation measures include: · mechanical grabs, if used, shall be designed and maintained to avoid spillage and sealed tightly while being lifted. For dredging of any contaminated mud, closed watertight grabs must be used; · all vessels shall be sized so that adequate clearance is maintained between vessels and the seabed in all tide conditions, to ensure that undue turbidity is not generated by turbulence from vessel movement or propeller wash; ·
all hopper barges and
dredgers shall be fitted with tight fitting seals to their bottom openings to
prevent leakage of material; · construction activities shall not cause foam, oil, grease, scum,
litter or other objectionable matter to be present on the water within the
site or dumping grounds; |
Work site
/ During the construction period |
Contractor |
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Ö |
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ProPECC PN 1/94; WPCO (TM-DSS) |
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· loading of barges and hoppers shall be controlled to prevent splashing of dredged material into the surrounding water. Barges or hoppers shall not be filled to a level that will cause the overflow of materials or polluted water during loading or transportation; and |
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· before commencement of the reclamation works, the holder of Environmental Permit has to submit plans showing the phased construction of the reclamation, design and operation of the silt curtain. |
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S5.8 |
Silt screens are recommended to be deployed at the seawater intakes during the reclamation works period. Installation of silt screens at the seawater intake points may cause a potential for accumulation and trapping of pollutants, floating debris and refuse behind the silt screens and may lead to potential water quality deterioration at the seawater intake points. Major sources of pollutants and floating refuse include the runoff and storm water discharges from the nearby coastal areas. As a mitigation measure to avoid the pollutant and refuse entrapment problems and to ensure that the impact monitoring results are representative, regular maintenance of the silt screens and refuse collection shall be performed at the monitoring stations at regular intervals on a daily basis. The Contractor shall be responsible for keeping the water behind the silt screen free from floating rubbish and debris during the impact monitoring period. |
Work site
/ During the construction period |
Contractor |
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Ö |
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EIAO-TM, WPCO |
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S5.8 |
Dredging of contaminated mud is
recommended as a mitigation measures for control of operational odour impact from
the |
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CEDD[2] |
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Ö |
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WPCO |
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S5.8 |
Construction Runoff and Drainage Exposed soil areas should be minimised to
reduce the potential for increased siltation, contamination of runoff, and
erosion. Construction runoff
related impacts associated with the above ground construction activities can
be readily controlled through the use of sediment traps and adequate
maintenance of drainage systems to prevent flooding and overflow. Construction site should be provided with adequately designed perimeter channel and pre-treatment facilities and proper maintenance. The boundaries of critical areas of earthworks should be marked and surrounded by dykes or embankments for flood protection. Temporary ditches should be provided to facilitate runoff discharge into the appropriate watercourses, via a silt retention pond. Permanent drainage channels should incorporate sediment basins or traps and baffles to enhance deposition rates. The design of efficient silt removal facilities should be based on the guidelines in Appendix A1 of ProPECC PN 1/94. Ideally, construction works
should be programmed to minimise surface excavation works during the rainy
season (April to September). All
exposed earth areas should be completed as soon as possible after earthworks
have been completed, or alternatively, within 14 days of the cessation of
earthworks where practicable. If
excavation of soil cannot be avoided during the rainy season, or at any time
of year when rainstorms are likely, exposed slope surfaces should be covered
by tarpaulin or other means. A sediment tank constructed
from pre-formed individual cells of approximately 6 ‑ Open stockpiles of
construction materials (for examples, aggregates, sand and fill material) of
more than |
Work
site / During the construction period |
Contractor |
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Ö |
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ProPECC PN 1/94; WPCO (TM-DSS) |
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S5.8 |
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 to be taken at
any time of year when rainstorms are likely, actions to be taken when a
rainstorm is imminent or forecast, 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. Oil interceptors should be
provided in the drainage system and regularly cleaned to prevent the release
of oils and grease into the storm water drainage system after accidental
spillages. The interceptor should
have a bypass to prevent flushing during periods of heavy rain. All vehicles and plant
should 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 located
wheel washing bay should be provided at every site exit, and wash-water
should 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 should be paved with
sufficient backfall toward the wheel-wash bay to prevent vehicle tracking of
soil and silty water to public roads and drains. |
Work
site / During the construction period |
Contractor |
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Ö |
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ProPECC PN 1/94; WPCO (TM-DSS) |
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S5.8 |
It is recommended that
on-site drainage system should be installed prior to the commencement of
other construction activities.
Sediment traps should be installed in order to minimise the sediment
loading of the effluent prior to discharge into foul sewers. There shall be no direct discharge of
effluent from the site into the sea. |
Work
site / During the construction period |
Contractor |
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Ö |
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ProPECC PN 1/94; WPCO (TM-DSS) |
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All temporary and permanent
drainage pipes and culverts provided to facilitate runoff discharge shall be
adequately designed for the controlled release of storm flows. All sediment control measures shall be
regularly inspected and maintained to ensure proper and efficient operation
at all times and particularly following rain storms. The temporarily diverted drainage
shall be reinstated to its original condition when the construction work is
finished or the temporary diversion is no longer required. |
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All fuel tanks and store
areas shall be provided with locks and be sited on sealed areas, within bunds
of a capacity equal to 110% of the storage capacity. |
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S5.8 |
Sewage from Construction Work Force Construction
work force sewage discharges on site shall be connected to the existing trunk
sewer or sewage treatment facilities.
The construction sewage shall be handled by portable chemical toilets
prior to the commission of the on-site sewer system. Appropriate numbers of portable
toilets shall be provided by a licensed contractor to serve the large number
of construction workers over the construction site. The Contractor shall also be
responsible for waste disposal and maintenance practices. |
Work
site / During the construction period |
Contractor |
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Ö |
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ProPECC PN 1/94; WPCO (TM-DSS) |
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S5.8 |
Floating Debris and Refuse Collection
and removal of floating refuse shall be performed at regular intervals on a
daily basis. The contractor shall
be responsible for keeping the water within the site boundary and the
neighbouring water free from rubbish. |
Work
site and adjacent water / During the construction period. |
Contractor |
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Ö |
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WPCO |
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S5.8 |
Storm Water
Discharges Minimum distances
of 100 m shall be maintained between the existing or planned stormwater
discharges and the existing or planned WSD flushing water intakes. |
Work
site and adjacent water / During the design and construction period. |
Contractor |
Ö |
Ö |
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WPCO |
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Operational Phase |
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S5.8 |
Existing
practices currently adopted by Marine Department for collection of floating
refuse at the Project site should be continued during the operational phase
of the Project. |
Project
site and adjacent water /During operational phase |
Marine
Department |
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Ö |
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WPCO, WDO |
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* Des - Design, C - Construction, O
– Operation, and Dec - Decommissioning
3 if employ Management, Operation and Maintenance
(MOM) Contract
Table 13.4 Implementation
Schedule for Waste Management
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EIA Ref |
Environmental Protection Measures / Mitigation Measures |
Location / Timing |
Implementation Agent |
Implementation Stages* |
Relevant Legislation and Guidelines |
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C |
O |
Dec |
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Construction Phase |
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S6.7.2 |
Marine Sediments
The dredged marine sediments would
be loaded onto barges, transported to and disposed of at the designated
disposal sites at South of Cheung Chau, East of Ninepin, East of Tung Lung
Chau, South of Tsing Yi or East of Sha Chau to be allocated by the MFC depending on their level
of contamination or at other disposal sites after consultation with the MFC
and EPD. In accordance with the ETWB TCW
No. 34/2002, the contaminated
material must be dredged and transported with great care. The mitigation measures recommended in
Section 5 of the EIA Report shall be incorporated. The dredged contaminated
sediment must be effectively isolated from the environment upon final
disposal and shall be disposed of at the Type 2 confined marine disposal
contaminated mud pit. |
Work site
/ During the construction period |
Contractor |
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Ö |
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ETWB TCW No. 34/2002 |
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S |
Based on the biological screening
results, the Category H (>10xLCEL) sediment which failed the biological
testing would require Type 3 special disposal. The volume of Category H sediment from
the |
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It will be the responsibility of
the Contractor to satisfy the appropriate authorities that the contamination
levels of the marine sediment to be dredged have been analysed and
recorded. According to the ETWB
TCW No. 34/2002, this will involve the submission of a formal Sediment
Quality Report to the DEP, at least 3 months prior to the dredging contract
being tendered |
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S |
During transportation and disposal
of the dredged marine sediments requiring Type 1 and Type 2 disposal, the
following measures shall be taken to minimise potential impacts on water
quality: |
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Bottom opening of barges shall be fitted with tight fitting seals to prevent
leakage of material. Excess
material shall be cleaned from the decks and exposed fittings of barges and
hopper dredgers before the vessel is moved. |
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·
Monitoring of the barge loading shall be conducted to ensure that loss
of material does not take place during transportation. Transport barges or vessels shall be
equipped with automatic self-monitoring devices as specified by the DEP. ·
Barges or hopper barges shall not be filled to a level that would cause
the overflow of materials or sediment laden water during loading or
transportation. |
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S |
Floating Refuse During the construction phase, the
project proponent’s contractor will be responsible for the collection of any refuse
within their works area. Floating booms will be provided on the water surface
to confine the refuse from the working barges as well as to avoid the
accumulation of pollutants within temporary embayment as mentioned in Table
13.3. |
Work site
/ During the construction period |
Contractor |
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Ö |
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S |
Good Site Practices 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 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; ·
regular cleaning and maintenance programme for
drainage systems, sumps and oil interceptors; and ·
a recording system for the amount of wastes
generated, recycled and disposed of (including the disposal sites). ·
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Work site
/ During the construction period |
Contractor |
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Ö |
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Waste
Disposal Ordinance (Cap.354) |
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S |
Waste Reduction Measures 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: |
Work site
/ During planning and design stage, and construction stage |
Contractor |
Ö |
Ö |
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·
Sort C&D waste from demolition of the existing waterfront
structures to recover recyclable portions such as metals. |
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·
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. |
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·
Encourage collection of aluminium cans, PET bottles
and paper by providing separate labelled bins to enable these wastes to be segregated
from other general refuse generated by the work force. ·
Any unused chemicals or those with remaining
functional capacity shall be recycled. ·
Use of reusable non-timber formwork to reduce the
amount of C&D material. ·
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. |
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S |
General Refuse
General refuse
shall be stored in enclosed bins or compaction units separate from C&D
material. A licensed waste
collector shall be employed by the contractor to remove general refuse from
the site, separately from C&D material. A collection
area shall be provided where wastes can be stored and loaded prior to removal
from site. An enclosed and
covered area is recommended to reduce the occurrence of 'wind blow' light
material. |
Work site
/ During the construction period |
Contractor |
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Ö |
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Public
Health and Municipal Services Ordinance (Cap. 132) |
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S6.7.11 |
Chemical Wastes
After use,
chemical wastes (for example, cleaning fluids, solvents, lubrication oil and
fuel) shall be handled according to the Code of Practice on the Packaging,
Labelling and Storage of Chemical Wastes. Spent chemicals shall be collected by
a licensed collector for disposal at the CWTF or other licensed facility in
accordance with the Waste Disposal (Chemical Waste) (General) Regulation. |
Work site
/ During the construction period |
Contractor |
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Ö |
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Waste
Disposal (Chemical Waste) (General) Regulation Code of
Practice on the Packaging, Labelling and Storage of Chemical Wastes |
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S6.7.12 |
Construction and Demolition
Material
C&D
material shall be sorted on-site into inert C&D material (that is, public
fill) and C&D waste. All the suitable inert C&D material shall be
broken down to |
Work site
/ During the construction period |
Contractor |
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Ö |
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ETWB TCW
No. 33/2002, 31/2004, 19/2005 |
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S6.7.13 |
In order to monitor the disposal
of public fill and C&D waste at public filling facilities and landfills,
respectively, and to control fly tipping, a trip-ticket system shall be
included as one of the contractual requirements and implemented by the
Environmental Team undertaking the environmental monitoring and audit work. An Independent Environment Checker shall
be responsible for auditing the results of the system. |
Work site
/ During the construction period |
Contractor and Independent Environmental
Checker |
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Ö |
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ETWB TCW
No. 31/2004 |
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* Des - Design, C - Construction, O
– Operation, and Dec - Decommissioning
Table 13.5 Implementation Schedule for Land Contamination
|
EIA Ref |
Environmental Protection Measures / Mitigation Measures |
Location / Timing |
Implementation Agent |
Implementation Stages* |
Relevant Legislation and Guidelines |
||||
|
Des |
C |
O |
Dec |
||||||
|
Construction and Operation Phase |
|||||||||
|
S. |
·
As no potential contaminative land uses were identified within the Study
Area, adverse land contamination impacts associated with the construction and
operation of the Project is not expected. As such, environmental protection and
mitigation measures are considered not necessary. |
- |
- |
|
|
|
|
- |
|
* Des - Design, C - Construction, O
– Operation, and Dec - Decommissioning
Table 13.6 Implementation
Schedule for Marine Ecology
|
EIA Ref |
Environmental Protection Measures
/ Mitigation Measures |
Location / Timing |
Implementation Agent |
Implementation Stages* |
Relevant Legislation and
Guidelines |
||||
|
Des |
C |
O |
Dec |
||||||
|
Construction & Operation
Phases |
|
|
|
|
|
|
|
||
|
S. |
Alternative design of the Trunk Road constructed
in tunnel should be adopted to avoid permanent reclamation in CBTS and
|
- |
CEDD/HyD |
Ö |
|
|
|
EIAO TM Annex 16 (Section 8.4) & EIAO Guidance Note No. 3/2002. |
|
|
S. |
Translocation of those potentially affected coral
colonies to the nearby suitable habitats such as
|
Ex- |
CEDD/HyD |
Ö |
|
|
|
EIAO TM Annex 16 (Section 8.4) & EIAO Guidance Note No. 3/2002. |
|
|
S. |
During dredging and filling operations, a
number of mitigation measures to control water quality should be adopted to
confine sediment plume within reclamation area and protect marine fauna in proximity to the
reclamation. The mitigation measures include the following:
·
Installation of silt
curtains during dredging activities
·
Use of tightly-closed
grab dredger
·
Reduction of dredging
rate
|
Work site / during construction phase |
Contractor |
|
Ö |
|
|
EIAO TM Annex 16 (Section 8.4) & EIAO Guidance Note No. 3/2002. |
|
|
|
·
Control of grab
descending speed
|
|
|
|
|
|
|
|
|
|
|
·
Construction of leading edges of seawall in
the early stages of the reclamation works
·
Adoption of
multiple-phase construction schedule
|
|
|
|
|
|
|
|
|
|
S. |
To minimize
potential disturbance impacts on the foraging ardeid population in the CBTS,
particularly in the area near the A King Shipyard, appropriate mitigation measures
should be adopted particularly during the construction phase. The following
measures are recommended:
·
Use of Quiet Mechanical Plant during the
construction phase should be adopted wherever possible.
·
Adoption of
multiple-phase construction schedule.
General measures to reduce noise generated
during the construction phase (see noise impact assessment) should be
effectively implemented.
|
Work site / during construction phase |
Contractor |
|
Ö |
|
|
EIAO TM Annex 16 (Section 8.4) & EIAO Guidance Note No. 3/2002. |
|
|
S. |
Seawalls should be constructed in advance around the reclamation areas within the area of the CBTS
to screen adjacent feeding ground from construction phase activities, reduce noise
disturbance to the associated seabirds and also to restrict access to this
habitat adjacent to works areas by ship traffic. |
Work site / during construction phase |
Contractor |
|
Ö |
|
|
EIAO TM Annex 16 (Section 8.4) & EIAO Guidance Note No. 3/2002. |
|
|
S.9.7.8 |
Loss of artificial seawall habitats should be
reinstated by the construction of about |
Work site / during construction phase |
Contractor |
|
Ö |
|
|
EIAO TM Annex 16 (Section 8.4) & EIAO Guidance Note No. 3/2002. |
|
*Des - Design, C - Construction, O – Operation, and Dec -
Decommissioning
Table 13.7 Implementation
Schedule for Landscape and Visual
|
EIA Ref |
Environmental Protection Measures / Mitigation Measures |
Location / Timing |
Implementation Agent |
Implementation Stages* |
Relevant Legislation and Guidelines |
||||
|
Des |
C |
O |
Dec |
||||||
|
Construction Phase |
|
|
|
|
|
|
|
||
|
Table 10.5 |
CM5 Control of night-time lighting. |
Work site
/ During Construction Phase |
Contractor |
|
Ö |
|
|
EIAO TM |
|
|
Table 10.5 |
CM6 Erection of decorative screen hoarding compatible with
the surrounding setting. |
Work site
/ During Construction Phase |
Contractor |
|
Ö |
|
|
EIAO TM |
|
|
Operation Phase |
|||||||||
|
Table 10.6, Figure |
OM4 Aesthetic design of proposed
waterfront promenade. |
Work site
/ During Design Stage and Operation Phases |
CEDD[3] |
Ö |
Ö |
Ö |
|
ETWB
TCW 2/2004 |
|
*Des - Design, C - Construction, O –
Operation, and Dec - Decommissioning