Table 14.1 Implementation Schedule of Recommended Mitigation Measures
EIA Ref. |
Recommended
Mitigation Measures |
Objectives of the
Recommended Measures & Main Concern to Address |
Who to implement the
measures? |
Location of the
measure |
When to implement
the measures? |
What requirements or
standards for the measure to achieve |
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Air Quality Impact |
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S3.8.1 |
Watering eight times a day on active works areas, exposed
areas and paved haul roads
|
To minimize the dust impact |
Contractor |
All Active Work Sites |
Construction Phase |
APCO |
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S3.8.1 |
Enclosing the unloading process at barging point by a
3-sided screen with top tipping hall, provision of water spraying and
flexible dust curtains
|
To minimize the dust impact |
Contractor |
Barging Points |
Construction Phase |
APCO |
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S3.8.7 |
Dust suppression measures stipulated in the Air Pollution
Control (Construction Dust) Regulation and good site practices: · Use of regular watering 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 area of
barging point, 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. · Provision of not less than 2.4m high
hoarding from ground level along site boundary where adjoins a road, streets
or other accessible to the public except for a site entrance or exit. · Imposition of speed controls for vehicles
on site haul roads. · Where possible, routing of vehicles and
positioning of construction plant should be at the maximum possible distance
from ASRs. · Every stock of more than 20 bags of
cement or dry pulverised fuel ash (PFA) should be covered entirely by
impervious sheeting or placed in an area sheltered on the top and the 3
sides. · Instigation of an environmental
monitoring and auditing program to monitor the construction process in order
to enforce controls and modify method of work if dusty conditions arise. |
To minimize the dust impact |
Contractor |
All Construction Work Sites |
Construction Phase |
APCO and Air Pollution Control (Construction Dust)
Regulation |
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Noise Impact |
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Construction Phase |
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S4.8 |
Use of quiet PME. Use of movable noise barriers for Excavator,
Lorry, Dump Truck, Mobile Crane, Compactor, Concrete Mixer Truck, Concrete Lorry
Mixer, Breaker, Mobile Crusher, Backhoe, Vibratory Poker, Saw, Asphalt Paver,
Vibratory Roller, Vibrolance, Hydraulic Vibratory Lance and Piling (Vibration
Hammer). Use of full enclosure for Air Compressor, Compressor, Bar Bender,
Generator, Drilling Rig, Chisel, Large Diameter Bore Piling, Grout Mixer
& Pump and Concrete Pump. |
To minimize construction noise impact arising from the
Project at the affected NSRs |
Contractor |
Work Sites |
Construction Phase |
EIAO-TM, NCO |
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S4.9 |
Good Site Practice: · Only well-maintained plant should be
operated on-site and plant should be serviced regularly during the
construction program. · Silencers or mufflers on construction
equipment should be utilized and should be properly maintained during the
construction program. · Mobile plant, if any, should be sited as
far away from NSRs as possible. · Machines and plant (such as trucks) that
may be in intermittent use should be shut down between works periods or
should be throttled down to a minimum. · Plant known to emit noise strongly in one
direction should, wherever possible, be orientated so that the noise is
directed away from the nearby NSRs. · Material stockpiles and other structures
should be effectively utilized, wherever practicable, in screening noise from
on-site construction activities. |
To minimize construction noise impact arising from the
Project at the affected NSRs |
Project Proponent |
Work Sites |
Construction Period |
EIAO-TM, NCO |
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S4.9 |
Scheduling of Construction Works during School Examination
Period |
To minimize construction noise impact arising from the
Project at the affected NSRs |
Contractor |
Work Site near school |
Construction Period |
EIAO-TM, NCO |
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Operation Phase (Traffic Noise) |
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S4.8 |
Direct mitigation measures for existing NSRs: ·
VB4-1: about 10m of 4m High
Vertical Noise Barrier on Cha Kwo Ling Road; ·
VB4-2: about 40m of 4m High
Vertical Noise Barrier on Cha Kwo Ling Road; ·
CT1: about 100m of 6m High
Cantilever Noise Barrier with 4.2m Cantilever (at 45 °) on Cha Kwo Ling Road; ·
CT2: about 80m of 6m High
Cantilever Noise Barrier with 3.7m Cantilever (at 90o) on road
EHC2; |
To reduce traffic noise impact at nearby Existing NSRs |
CEDD |
Cha Kwo Ling Road; |
Design stage & before commencement of operation phase |
EIAO-TM |
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|
·
FE1: about 400m Landscape deck
provided on the entire extent of the Main line (Cha Kwo Ling Side); ·
FE2: about 130m of Full-enclosure
provided on road S2; ·
FE3: about 120m of Full-enclosure
provided on road EHC4; ·
FE4: about 200m of Full-enclosure
provided on road P2; ·
SE1: about 310m of Semi-enclosure
provided on road EHC2; ·
SE2: about 180m of Semi-enclosure
provided on road S2; ·
SE3: about 30m of Semi-enclosure
provided on road EHC4; ·
VB5-1: about 130m of 5m High
Vertical Noise Barrier provided at road EHC4; ·
VB5-2: about 50m of 5m High
Vertical Noise Barrier provided at road EHC4; ·
VB5-3: about 80m of 5m High
Vertical Noise Barrier provided at road EHC1; ·
VB5-4: about 70m of 5m High
Vertical Noise Barrier provided at road EHC1; ·
VB5-5: about 170m of 5m High
Vertical Noise Barrier provided at road S3; ·
VB5-6: about 180m of 5m High Vertical
Noise Barrier provided at road S1; |
|
|
Lam Tin Interchange |
|
|
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|
·
LNS1: about 190m of Low Noise
Surfacing on North and South Bound Road P2; ·
LNS2: about 100m of Low Noise
Surfacing on East and West Bound Po Yap Road; and ·
LNS3: about 200m of Low Noise Surfacing
on East and West Bound Po Yap Road It should be noted that the exact length of the mitigation
measures would be subject to minor refinement during the detailed design
stage. |
|
|
Road
P2 and Po Yap Road |
|
|
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S4.8 |
Direct mitigation measures for planned NSRs: ·
FE5: about 80m of Full-enclosure
on road EHC4 It should be noted that the exact length of the mitigation
measures would be subject to minor refinement during the detailed design
stage. |
To reduce traffic noise impact at nearby Planned NSRs |
Project Proponent |
·
Road EHC4 |
Before occupation of Planned Residential Site at Ex-Cha Kwo
Ling Kaolin Mine Site and TKO Area 66 |
EIAO-TM |
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Operation Phase (Fixed Plant Noise) |
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S4.8 |
Good practice in order to minimise the nuisance on the
neighbouring NSRs for all fixed plant noise: · Exhaust
of Ventilation System and any opening of the building should be facing away
from any NSRs · Louver
or other acoustic treatment equipment applied to exhaust of Ventilation
System |
Minimise the operation fixed plant noise nuisance on the
neighbouring NSRs |
Project Proponent |
TKOLTT Ventilation Buildings (both Yau Tong and TKO Side)
and Pumping station at Road P2 |
Design stage and before commencement of operation of ventilation buildings and
pumping station |
EIAO-TM |
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Water Quality Impact
|
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Construction Phase |
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S5.6.24 |
The dry density of filling material
for the TKO-LT Tunnel reclamation should be 1,900kg/m3, with fine
content of 25% or less. |
Control potential impacts from filling activities |
CEDD’s
Contractors |
Work site |
Construction Phase |
EIAO-TM, WPCO |
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S5.8.1 |
Non-dredged method by constructing
steel cellular caisson structure with stone column shall be adopted for
construction of seawall foundation.
During the stone column installation (also including the installation
of steel cellular caisson), silt curtain shall be employed around the active
stone column installation points. |
Control potential impacts from filling activities |
CEDD’s
Contractors |
Work site |
Construction Phase |
EIAO-TM, WPCO |
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S5.8.2 |
Formation of seawall enclosing the
reclamation for Road P2 (notwithstanding an opening of about 50m for marine
access) shall be completed prior to the filling activities. The seawall opening of about 50m wide for
marine access shall be selected at a location as indicatively shown in
Appendix 5.10. No more than 3 filling barge trips per day shall be made with
a maximum daily rate of 3,000m3 (i.e. 1,000 m3 per
trip) for the filling operation at the reclamation area for Road P2. All filling works shall be carried out
behind the seawall with the use of single silt curtain at the marine access. |
Control potential impacts from filling activities |
CEDD’s
Contractors |
Work site |
Construction Phase |
EIAO-TM, WPCO |
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S5.8.3 |
Other good site practices should be
undertaken during filling operations include: floating single silt curtain shall be
employed for all marine works; any pipe leakages shall be repaired
quickly. Plant should not be operated with leaking pipes; |
Control potential impacts from filling activities and
marine-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
EIAO-TM, WPCO,
Waste Disposal Ordinance (WDO) |
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S5.8.4 |
Site specific mitigation plan for
reclamation areas using public fill materials should be submitted for EPD
agreement before commencement of construction phase with due consideration of
good site practices. |
Control potential impacts from filling activities and
marine-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
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S5.8.5 |
It is important that appropriate
measures are implemented to control runoff and drainage and prevent high
loading of SS from entering the marine environment. Proper site management is essential to
minimise surface water runoff, soil erosion and sewage effluents. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
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S5.8.6 |
Any practical options for the
diversion and re-alignment of drainage should comply with both engineering
and environmental requirements in order to ensure adequate hydraulic capacity
of all drains. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Design Stage and Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO, TM-DSS |
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S5.8.7 |
Construction site runoff and
drainage should be prevented or minimised in accordance with the guidelines
stipulated in the EPD's Practice Note for Professional Persons, Construction
Site Drainage (ProPECC PN 1/94). Good
housekeeping and stormwater best management practices, as detailed in below,
should be implemented to ensure that all construction runoff complies with
WPCO standards and no unacceptable impact on the WSRs arises due to
construction of the TKO-LT Tunnel. All
discharges from the construction site should be controlled to comply with the
standards for effluents discharged into the corresponding WCZ under the
TM-DSS. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO, TM-DSS |
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S5.8.8 |
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 appropriate
mitigation measures which include: adequate maintenance of drainage
systems to prevent flooding and overflow. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
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S5.8.9 |
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. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
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S5.8.10 |
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. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
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S5.8.11 |
Sedimentation tanks of sufficient
capacity, constructed from pre-formed individual cells of approximately 6 to
8m3 capacity, are recommended as a general mitigation measure
which can be used for settling surface runoff prior to disposal. The system capacity is flexible and able to
handle multiple inputs from a variety of sources and particularly suited to
applications where the influent is pumped. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
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S5.8.12 |
Earthworks final surfaces should be
well compacted and the subsequent permanent work or surface protection should
be carried out immediately after the final surfaces are formed to prevent
erosion caused by rainstorms. Appropriate
drainage like intercepting channels should be provided where necessary. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
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S5.8.13 |
Measures should be taken to
minimize the ingress of rainwater into trenches. If excavation of trenches in wet seasons is
necessary, they should be dug and backfilled in short sections. Rainwater pumped out from trenches or foundation
excavations should be discharged into storm drains via silt removal
facilities. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
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S5.8.14 |
Open stockpiles of construction
materials (for examples, aggregates, sand and fill material) of more than 50m3
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. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
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S5.8.15 |
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. Discharge of surface run-off into foul
sewers must always be prevented in order not to unduly overload the foul
sewerage system. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
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S5.8.16 |
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, especially for areas located near steep slopes. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
||||||
S5.8.17 |
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. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
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S5.8.18 |
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. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
||||||
S5.8.19 |
Silt removal facilities, channels
and manholes should be maintained and the deposited silt and grit should be
removed regularly, at the onset of and after each rainstorm to ensure that
these facilities are functioning properly at all times. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
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S5.8.20 |
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. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
||||||
S5.8.21 |
All temporary and permanent
drainage pipes and culverts provided to facilitate runoff discharge should be
adequately designed for the controlled release of storm flows. All sediment control measures should be
regularly inspected and maintained to ensure proper and efficient operation
at all times and particularly following rain storms. The temporarily diverted drainage should be
reinstated to its original condition when the construction work has finished
or the temporary diversion is no longer required. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
||||||
S5.8.22 |
All fuel tanks and storage areas
should be provided with locks and be located on sealed areas, within bunds of
a capacity equal to 110% of the storage capacity of the largest tank, to
prevent spilled fuel oils from reaching the coastal waters. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO, WDO |
||||||
S5.8.23 |
Minimum distances of 100m shall be
maintained between the existing or planned stormwater discharges and the
existing or planned seawater intakes during construction and operational
phases |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
EIAO-TM, WPCO, TM-DSS |
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S5.8.24 |
Under normal circumstances,
groundwater pumped out of wells, etc. for the lowering of ground water level
in basement or foundation construction, and groundwater seepage pumped out of
tunnels or caverns under construction should be discharged into storm drains
after the removal of silt in silt removal facilities. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
||||||
S5.8.25 - S5.8.27 & Table 5.18 |
Grouting would be adopted as
measure to reduce the groundwater inflow into the tunnel. During the tunnel excavation, the inflow
rate of groundwater into the tunnel will be measured during the excavation. The groundwater levels above the tunnel
will also be monitored by piezometers.
If the inflow rate exceeds the pre-determined groundwater control
criteria or the groundwater drawdown exceeds the required limit,
pre-excavation grouting will be required to reduce the groundwater
inflow. No significant change of
groundwater levels would therefore be expected. Any chemicals/ foaming agents which
would be entrained to the groundwater should be biodegradable and non-toxic
throughout the tunnel construction.
Potential groundwater quality impact would be minimal as the used
material is non-toxic and biodegradable.
No adverse groundwater quality would therefore be expected. Prescriptive measures in the form
of an Action Plan with pre-emptive and re-active to preserve the groundwater
levels at all times during the tunnel construction are set out in Table 5.18. |
Control potential impacts from groundwater drawdown and
contamination |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO, Buildings Ordinance |
||||||
S5.8.28 |
Water used in ground boring and
drilling for site investigation or rock / soil anchoring should as far as
practicable be recirculated after sedimentation. When there is a need for final disposal,
the wastewater should be discharged into storm drains via silt removal facilities. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Design Stage and Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
||||||
S5.8.29 - S5.8.31 |
Wastewater generated from the
washing down of mixing trucks and drum mixers and similar equipment should
whenever practicable be recycled. The
discharge of wastewater should be kept to a minimum. To prevent pollution
from wastewater overflow, the pump sump of any water recycling system should
be provided with an on-line standby pump of adequate capacity and with
automatic alternating devices. Under normal circumstances, surplus wastewater
may be discharged into foul sewers after treatment in silt removal and pH
adjustment facilities (to within the pH range of 6 to 10). Disposal of wastewater into storm drains
will require more elaborate treatment. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
||||||
S5.8.32 |
All vehicles and plant should be
cleaned before they leave a construction site to ensure no earth, mud, debris
and the like is deposited by them on roads.
A wheel washing bay should be provided at every site exit if
practicable and wash-water should have sand and silt settled out or removed
before discharging into storm drains.
The section of construction road between the wheel washing bay and the
public road should be paved with backfall to reduce vehicle tracking of soil
and to prevent site run-off from entering public road drains. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
||||||
S5.8.33 |
Bentonite slurries used in
diaphragm wall and bore-pile construction should be reconditioned and reused
wherever practicable. If the disposal
of a certain residual quantity cannot be avoided, the used slurry may be
disposed of at the marine spoil grounds subject to obtaining a marine dumping
licence from EPD on a case-by-case basis. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
||||||
S5.8.34 |
If the used bentonite slurry is
intended to be disposed of through the public drainage system, it should be
treated to the respective effluent standards applicable to foul sewer, storm
drains or the receiving waters as set out in the WPCO Technical Memorandum on
Effluent Standards. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
||||||
S5.8.35 |
Water used in water testing to
check leakage of structures and pipes should be reused for other purposes as
far as practicable. Surplus unpolluted
water could be discharged into storm drains. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
||||||
S5.8.36 |
Sterilization is commonly
accomplished by chlorination. Specific
advice from EPD should be sought during the design stage of the works with
regard to the disposal of the sterilizing water. The sterilizing water should be reused
wherever practicable. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Design Stage and Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
||||||
S5.8.37 |
Before commencing any demolition
works, all sewer and drainage connections should be sealed to prevent
building debris, soil, sand etc. from entering public sewers/drains. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
||||||
S5.8.38 |
Wastewater generated from building
construction activities including concreting, plastering, internal
decoration, cleaning of works and similar activities should not be discharged
into the stormwater drainage system.
If the wastewater is to be discharged into foul sewers, it should
undergo the removal of settleable solids in a silt removal facility, and pH
adjustment as necessary. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
||||||
S5.8.39 |
Acidic wastewater generated from
acid cleaning, etching, pickling and similar activities should be neutralized
to within the pH range of 6 to 10 before discharging into foul sewers. If there is no public foul sewer in the
vicinity, the neutralized wastewater should be tinkered off site for disposal
into foul sewers or treated to a standard acceptable to storm drains and the
receiving waters |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
||||||
S5.8.40 |
Wastewater collected from canteen
kitchens, including that from basins, sinks and floor drains, should be
discharged into foul sewer via grease traps capable of providing at least 20
minutes retention during peak flow. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
||||||
S5.8.41 |
Drainage serving an open oil
filling point should be connected to storm drains via a petrol interceptor
with peak storm bypass. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
||||||
S5.8.42 |
Vehicle and plant servicing areas,
vehicle wash bays and lubrication bays should as far as possible be located
within roofed areas. The drainage in
these covered areas should be connected to foul sewers via a petrol
interceptor. Oil leakage or spillage
should be contained and cleaned up immediately. Waste oil should be collected and stored
for recycling or disposal in accordance with the Waste Disposal Ordinance. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
||||||
S5.8.43 |
Construction work force sewage
discharges on site are expected to be connected to the existing trunk sewer
or sewage treatment facilities. The
construction sewage may need to 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. |
Control potential impacts from construction site runoff and
land-based construction |
CEDD’s
Contractors |
Work site |
Construction Phase |
ProPECC PN 1/94,
EIAO-TM, WPCO |
||||||
S5.8.44 |
Contractor must register as a
chemical waste producer if chemical wastes would be produced from the
construction activities. The Waste Disposal Ordinance (Cap 354) and its
subsidiary regulations in particular the Waste Disposal (Chemical Waste)
(General) Regulation should be observed and complied with for control of
chemical wastes. |
Control potential impacts from accidental spillage of
chemicals |
CEDD’s
Contractors |
Work site |
Construction Phase |
EIAO-TM, WPCO, WDO |
||||||
S5.8.45 |
Any service shop and maintenance
facilities should be located on hard standings within a bunded area, and
sumps and oil interceptors should be provided. Maintenance of vehicles and equipment
involving activities with potential for leakage and spillage should only be
undertaken within the areas appropriately equipped to control these
discharges. |
Control potential impacts from accidental spillage
of chemicals |
CEDD’s
Contractors |
Work site |
Construction Phase |
EIAO-TM, WPCO |
||||||
S5.8.46 |
Disposal of chemical wastes should
be carried out in compliance with the Waste Disposal Ordinance. The “Code of Practice on the Packaging,
Labelling and Storage of Chemical Wastes” published under the Waste
Disposal Ordinance details the requirements to deal with chemical wastes.
General requirements are given as follows: |
Control potential impacts from accidental spillage
of chemicals |
CEDD’s
Contractors |
Work site |
Construction Phase |
EIAO-TM, WPCO, WDO |
||||||
S5.8.47 |
Collection and
removal of floating refuse should be performed at regular intervals on a
daily basis. The contractor should be
responsible for keeping the water within the site boundary and the
neighbouring water free from rubbish. |
Control potential impacts from floating refuse and debris |
CEDD’s
Contractors |
Work site |
Construction Phase |
EIAO-TM, WPCO |
||||||
Operation Phase |
|
|
|
|
|
|||||||
S5.8.49 |
The road
drainage should be provided with adequately designed silt trap and oil
interceptors, as necessary. The design
of the operational stage mitigation measures for the road works shall take
into account the guidelines published in ProPECC PN 5/93 “Drainage Plans subject to Comment by the
EPD”. |
Control potential impacts from surface runoff of new road
works |
CEDD, HyD |
Project site |
Design Stage and Operational Phase |
ProPECC PN 5/93, EIAO-TM, WPCO |
||||||
S5.8.50 |
Regular
maintenance and refuse collection are proposed at locations of embayed waters
and locations with potential floating refuse entrapment problems. |
Control potential impacts from floating refuse |
MD |
Project site |
Operational Phase |
EIAO-TM, WPCO, WDO |
||||||
S5.8.51 |
All new sewage
effluent generated from the Project should be properly collected and diverted
to the public sewers. No direct
discharge of sewage effluent into the marine water shall be allowed. |
Control potential impacts from sewage generation |
CEDD |
Project site |
Design Stage and Operational Phase |
EIAO-TM, WPCO |
||||||
S5.8.52 |
During the
operational phase, contractor responsible for construction of tunnel section
will conduct a 1-year post-monitoring (after the completion of the tunnelling
works) on the groundwater levels above the tunnel. Details on this post-monitoring will be
specified by the engineers during the design and construction stage of the
Project. Grouting will be required for
any unexpected groundwater drawdown.
No significant change of groundwater levels would therefore be
expected. |
Control potential impacts from groundwater levels |
CEDD’s Contractors |
Project site |
Design Stage and Operational Phase |
EIAO-TM, WPCO |
||||||
Ecological Impact
|
||||||||||||
S6.8.4 |
Measures to Minimize Disturbance · Use of Quiet Mechanical Plant during the
construction phase should be adopted wherever possible. · Hoarding or fencing should be erected
around the works area boundaries during the construction phase. The hoarding
would screen adjacent habitats from construction phase activities, reduce
noise disturbance to these habitats and also to restrict access to habitats
adjacent to works areas by site workers;
· Regular spraying of haul roads to
minimize impacts of dust deposition on adjacent vegetation and habitats
during the construction activities. |
Minimize noise, human and traffic disturbance to terrestrial habitat and wildlife; and
reduce dust generation |
Design Team / Contractor |
Land-based works area |
Construction Phase |
N/A |
||||||
S6.8.5 |
Standard Good Site Practice · 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 works areas that should be clearly demarcated. The works areas
should be reinstated after completion of the works. · Waste skips should be provided to collect
general refuse and construction wastes. The wastes should be properly
disposed off-site in a timely manner. · 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. · Measures should also be put into place so
that litter, fuel and solvents do not enter the nearby watercourses. |
Reduce disturbance to surrounding habitats |
Contractor |
Land-based works area |
Construction Phase |
N/A |
||||||
S6.8.6 |
Measure to Minimize Groundwater Inflow ·
The drained tunnel construction method with groundwater inflow control
measures would generally be adopted. ·
During the tunnel excavation, pre-excavation grouting could be adopted
to reduce the groundwater inflow and ensure that the tunnel would meet the
long term water tightness requirements. |
Minimize groundwater inflow |
Contractor |
Tunnel |
Construction Phase |
N/A |
||||||
S6.8.8 |
Measure to Minimize Impact on Corals Coral translocation · It is
recommended to translocate the affected coral colonies, except the locally
common Oulastrea crispata, within the reclamation area and bridge
footprint to the other suitable locations as far as practicable. · The
coral translocation should be conducted during the winter months
(November-March) in order to avoid disturbance during their spawning period
(i.e. July to October). · A
detailed coral translocation plan with a description on the methodology for
pre-translocation coral survey, translocation methodology,
identification/proposal of coral recipient site, monitoring methodology for
post-translocation should be prepared during the detailed design stage. · The
coral translocation plan should be subject to approval by relevant
authorities (e.g. EPD and AFCD) before commencement of the coral translocation. · All
the translocation exercises should be conducted by experienced marine
ecologist(s) who is/are approved by AFCD prior to commencement of coral
translocation. Post translocation Monitoring · A
coral monitoring programme is recommended to assess any adverse and
unacceptable impacts to the translocated coral communities · Information
gathered during each post-translocation
monitoring survey should include observations on the presence,
survival, health condition and growth of the translocated coral colonies. These parameters should then be compared
with the baseline results collected from the pre-translocation survey. |
Minimize loss of coral |
Design team, contractor, project operator |
Within reclamation areas and pier footprint |
Prior construction |
N/A |
||||||
S6.8.9 -S6.8.10 |
Measure to Control Water Quality Impact · Deployment
of silt curtains around the active stone column installation points, opening
of newly installed seawall and marine works area. · Diverting
of the site runoff to silt trap facilities before discharging into storm
drain; · Proper
waste and dumping management; and ·
Standard good-site practice for
land-based construction. |
Control water quality impact, especially on suspended solid
level; minimize the contamination of wastewater discharge, accidental chemical
spillage and construction site run-off to the receiving water bodies |
Design Team, contractor |
Marine and land-based
works area |
Construction phase |
WQO |
||||||
S6.8.11 |
Compensation for Vegetation Loss · Felling
of mature trees should be compensated by planting of standard or heavy
standard trees within or in vicinity of the affected area as far as
practicable. Such compensatory
planting for trees should be provided with at least a 1:1 ratio. In addition, vegetation at the temporarily
affected area should be reinstated with species similar to the existing
condition. |
Compensate for the vegetation loss |
Design Team, contractor |
Land-based works area |
Construction phase |
N/A |
||||||
Fisheries Impact
|
||||||||||||
S7.7.3 |
Measure to Control Water Quality Impact · Deployment
of silt curtains around the active stone column installation points, opening
of newly installed seawall and marine works area. |
Control water quality impact, especially on suspended solid
level |
Design Team / Contractor |
Marine work area |
Construction phase |
WQO |
||||||
Waste Management
|
||||||||||||
Construction Phase |
|
|
|
|
|
|||||||
S8.6.3 |
Good Site
Practices and Waste Reduction Measures · 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 site
cleanliness, proper waste management and chemical handling procedures; · Provision of sufficient waste disposal
points and regular collection of waste; · Appropriate measures to minimize
windblown litter and dust during transportation of waste by either covering
trucks or by transporting wastes in enclosed containers; and · Regular cleaning and maintenance
programme for drainage systems, sumps and oil interceptors. |
To reduce waste management impacts |
Contractor |
All
work
sites |
Construction Phase |
Waste
Disposal Ordinance (Cap. 354) Land
(Miscellaneous Provisions) Ordinance (Cap. 28) |
||||||
S8.6.4 |
Good Site
Practices and Waste Reduction Measures (con’t) · Segregation and storage of different types
of waste in different containers, skips or stockpiles to enhance reuse or
recycling of materials and their proper disposal; · Encourage collection of aluminium cans by
providing separate labelled bins to enable this waste to be segregated from
other general refuse generated by the workforce; · Proper storage and site practices to
minimize the potential for damage or contamination of construction materials;
and · Plan and stock construction materials
carefully to minimize amount of waste generated and avoid unnecessary
generation of waste. |
To achieve waste reduction |
Contractor |
All
work
sites |
Construction Phase |
Waste
Disposal Ordinance (Cap. 354) Land (Miscellaneous Provisions) Ordinance (Cap. 28) |
||||||
S8.6.5 |
Good Site
Practices and Waste Reduction Measures (con’t) The Contractor shall prepare and implement a WMP as
part of the EMP in accordance with ETWB TCW No. 19/2005 which describes the
arrangements for avoidance, reuse, recovery, recycling, storage, collection,
treatment and disposal of different categories of waste to be generated from
the construction activities. Such a
management plan should incorporate site specific factors, such as the
designation of areas for segregation and temporary storage of reusable and
recyclable materials. The EMP should
be submitted to the Engineer for approval.
The Contractor should implement the waste management practices in the
EMP throughout the construction stage of the Project. The EMP should be reviewed regularly and
updated by the Contractor. |
To achieve waste reduction |
Contractor
|
All
work
sites |
Construction Phase |
ETWB TCW No. 19/2005 |
||||||
S8.6.6 |
Good Site
Practices and Waste Reduction Measures (con’t) C&D materials would be reused in the
project and other local concurrent projects as far as possible. |
To achieve waste reduction |
Contractor |
All
work
sites |
Construction Phase |
ETWB TCW No. 19/2005 |
||||||
S8.6.7 |
Storage, Collection and Transportation of
Waste Should any temporary storage or
stockpiling of waste is required, recommendations to minimize the impacts
include: · Waste, such as soil, should be handled
and stored well to ensure secure containment, thus minimizing the potential
of pollution; · Maintain and clean storage areas
routinely; · Stockpiling area should be provided with
covers and water spraying system to prevent materials from wind-blown or
being washed away; and · Different locations should be designated
to stockpile each material to enhance reuse. |
To minimize potential adverse environmental impacts arising
from waste storage |
Contractor |
All work sites |
Construction Phase |
- |
||||||
S8.6.8 |
Storage, Collection and Transportation of
Waste (con’t) · Remove waste in timely manner; · Waste collectors should only collect
wastes prescribed by their permits; · Impacts during transportation, such as
dust and odour, should be mitigated by the use of covered trucks or in
enclosed containers; · Obtain relevant waste disposal permits
from the appropriate authorities, in accordance with the Waste Disposal
Ordinance (Cap. 354), Waste Disposal (Charges for Disposal of Construction
Waste) Regulation (Cap. 345) and the Land (Miscellaneous Provisions)
Ordinance (Cap. 28); · Waste should be disposed of at licensed
waste disposal facilities; and · Maintain records of quantities of waste
generated, recycled and disposed. |
To minimize potential adverse environmental impacts arising
from waste collection and disposal |
Contractor |
All work sites |
Construction Phase |
- |
||||||
S8.6.9 |
Storage, Collection and Transportation of
Waste (con’t) Implementation of trip ticket system with reference
to DEVB TC(W) No. 6/2010, Trip Ticket
System for Disposal of Construction & Demolition Materials, to
monitor disposal of waste and to control fly-tipping at PFRFs or
landfills. A recording system for the
amount of waste generated, recycled and disposed (including disposal sites)
should be proposed. |
To minimize potential adverse environmental impacts arising
from waste collection and disposal |
Contractor |
All work sites |
Construction Phase |
DEVB TCW No. 6/2010 |
||||||
S8.6.11 - S8.6.13 |
Sorting of C&D Materials · Sorting to be performed to recover the
inert materials, reusable and recyclable materials before disposal off-site. · Specific areas shall be provided by the
Contractors for sorting and to provide temporary storage areas for the sorted
materials. · The C&D materials should at least be
segregated into inert and non-inert materials, in which the inert portion
could be reused and recycled in the reclamation as far as practicable before
delivery to PFRFs. While opportunities for reusing the non-inert portion
should be investigated before disposal of at designated landfills. |
To minimize potential adverse environmental |
Contractor |
All work sites |
Construction Phase |
DEVB TCW No. 6/2010 ETWB TCW No. 33/2002 ETWB TCW No. 19/2005 |
||||||
S8.6.15 – S8.6.16 |
Sediments · Sediment encountered may be reused as
filling material on-site after cement stabilization. Cement-stabilization
process is undertaken by mixing sediment and cement and will convert sediment
to earth filling material. The treated sediment has to comply with Risk-Based
Remediation Goals (RBRGs) before being reused in order not to raise any land
contamination issue. The adoption of RBRGs to assess stabilized
sediment has been proposed in the current C&DMMP. MFC has no adverse comment on the current
C&DMMP. The sediment quality indicates that all
sediments comply with most stringent RBRGs except for one sediment sample
(TKO-EBH501 3-3.95m) with lead exceeding the RBRG. Except for the sediment
sample (TKO-EBH501 3-3.95m), the chemical screening results do not indicate
sediment as contaminated soil. It is anticipated that reuse of sediment
except sediment sample (TKO-EBH501 3-3.95m) will not lead to land
contamination. · Despite exceedance of RBRG, onsite reuse
of sediment under sample (TKO-EBH501 3-3.95m) as filling material after
cement stabilization is also a suitable treatment. Sediment quality indicates
the sediment sample (TKO-EBH501 3-3.95m) exceed RBRG for lead. While cement
stabilization will immobilize metal contaminants, it is capable to treat the
exceedance on lead. The stabilized material should comply with UTS of Lead
and UCS. If the treated material do not comply with UTS or UCS,
re-stabilization have to be undertaken to meet compliance of UTS and UCS
before reusing the treated sediment as filling material. However, further
agreement on final disposal/treatment on sediment under sample (TKO-EBH501
3-3.95m) has to be sought from DEP. |
To ensure the sediment to be disposed of in an authorized
and least impacted way |
contractor |
All works areas with sediments concern |
Construction Phase |
RBRG |
||||||
S8.6.17 – S8.6.20 |
Sediments (con’t) · Requirements of the Air Pollution Control (Construction Dust) Regulation, where
relevant, shall be adhered to during boring, excavation, transportation and
disposal of sediments or cement stabilization of sediment. · A treatment area should be confined for
carrying out the cement stabilization mixing and temporary stockpile. The
area should be designed to prevent leachate from entering the ground.
Leachate, if any, should be collected and discharged according to the Water Pollution Control Ordinance
(WPCO). · In order to minimise the potential odour
/ dust emissions during boring, excavation and transportation of the
sediment, the excavated sediments should be kept wet during excavation/boring
and should be properly covered when placed on barges/trucks. Loading of the excavated sediment to the
barge should be controlled to avoid splashing and overflowing of the sediment
slurry to the surrounding water. · In order to minimise the exposure to
contaminated materials, workers should, when necessary, wear appropriate
personal protective equipments (PPE) when handling contaminated
sediments. Adequate washing and
cleaning facilities should also be provided on site. |
To determine the best handling and treatment of sediment |
Contractor |
All works areas with sediments concern |
Construction Phase |
|
||||||
S8.6.21 |
Sediments (con’t) |
To ensure the sediment to be disposed of in an authorized
and least impacted way |
contractor |
All works areas with sediments concern |
Construction Phase |
ETWB TC(W) No. 34/2002 & Dumping at Sea Ordinance |
||||||
S8.6.23 |
Sediments (con’t) ·
For
allocation of sediment disposal sites and application of marine dumping
permit, separate SSTP has to be submitted to EPD for agreement under DASO.
Additional site investigation, based on the SSTP, maybe carried out in order
to confirm the disposal arrangements for the proposed sediments removal. A
Sediment Quality Report (SQR) shall then be required for EPD agreement under
DASO prior to the tendering of the construction contract, discussing in
details the site investigation, testing results as well as the delineation of
each of the categories of excavated materials and the corresponding types of
disposal. |
To determine the best handling and disposal option of
sediment |
Contractor |
All works areas with sediments concern |
Construction Phase |
ETWB TC(W) No. 34/2002 & Dumping at Sea Ordinance |
||||||
S8.6.24 - S8.6.28 |
Sediments (con’t) ·
The excavated sediments is expected to be loaded
onto the barge and transported to the designated disposal sites allocated by the MFC. The excaveted
sediment would be disposed of according to its determined disposal options
and ETWB TC(W) No. 34/2002. ·
Stockpiling of contaminated sediments should be
avoided as far as possible. If
temporary stockpiling of contaminated sediments is necessary, the excavated sediment
should be covered by tarpaulin and the area should be placed within earth
bunds or sand bags to prevent
leachate from entering the ground, nearby drains and surrounding water
bodies. The stockpiling areas should
be completely paved or covered by linings in order to avoid contamination to
underlying soil or groundwater.
Separate and clearly defined areas should be provided for stockpiling
of contaminated and uncontaminated materials.
Leachate, if any, should be collected and discharged according to the
Water Pollution Control Ordinance (WPCO). ·
In order to minimise the potential odour / dust
emissions during boring and transportation of the sediment, the excavated sediments
should be kept wet during excavation/boring and should be properly
covered when placed on barges. Loading
of the excavated sediment to
the barge should be controlled to avoid splashing and overflowing of the
sediment slurry to the surrounding water. ·
The barge transporting the sediments to the
designated disposal sites should be equipped with tight fitting seals to
prevent leakage and should not be filled
to a level that would cause overflow of materials or laden water during
loading or transportation. In addition, 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. · In order to minimise the exposure to
contaminated materials, workers should, when necessary, wear appropriate
personal protective equipments (PPE) when handling contaminated sediments. Adequate washing and cleaning facilities
should also be provided on site. ·
Another
possible arrangement for Type 3 disposal is by geosynthetic containment. A
geosynthetic containment method is a method whereby the sediments are sealed
in geosynthetic containers and, at the disposal site, the containers would be
dropped into the designated contaminated mud pit where they would be covered
by further mud disposal and later by the mud pit capping, thereby meeting the
requirements for fully confined mud disposal. |
To ensure handling of sediments are in accordance to
statutory requirements |
Contractor |
All works areas with sediments concern |
Construction Phase |
ETWB TC(W) No. 34/2002 & Dumping at Sea Ordinance |
||||||
S8.6.26 |
Chemical Wastes If chemical wastes are produced at the construction
site, the Contractor would be required to register with the EPD as a Chemical
Waste Producer and to follow the guidelines stated in the Code of Practice on the Packaging,
Labelling and Storage of Chemical
Wastes. Good quality containers
compatible with the chemical wastes should be used, and incompatible
chemicals should be stored separately.
Appropriate labels should be securely attached on each chemical waste
container indicating the corresponding chemical characteristics of the
chemical waste, such as explosive, flammable, oxidizing, irritant, toxic,
harmful, corrosive, etc. The
Contractor shall use a licensed collector to transport and dispose of the
chemical wastes, to either the Chemical Waste Treatment Centre at Tsing Yi,
or other licensed facility, in accordance with the Waste Disposal (Chemical Waste) (General) Regulation. |
To ensure proper management of chemical waste |
Contractor |
All works sites |
Construction Phase |
Code of Practice on the Packaging, Labelling and Storage of
Chemical Wastes Waste Disposal (Chemical Waste) (General) Regulation |
||||||
S8.6.27 |
General Refuse General refuse should be stored in enclosed bins or
compaction units separate from C&D material. A reputable waste collector should be
employed by the contractor to remove general refuse from the site, separately
from C&D material. Preferably an
enclosed and covered area should be provided to reduce the occurrence of
'wind blown' light material. |
To ensure proper management of general refuse |
Contractor |
All works sites |
Construction Phase |
Public Health and Municipal Services Ordinance (Cap. 132) |
||||||
Operation Phase |
|
|
|
|
|
|||||||
S8.6.30 - S8.6.31 |
Chemical Wastes · Non-recyclable chemical waste should be
disposed of at appropriate facility like CWTC by licensed collectors. Recyclable chemical waste should be
collected and transported off-site by licensed collectors. |
To avoid environmental impacts in handling, storage and
disposal of chemical waste |
Operator |
All facilities |
Operation waste |
Code of Practice on the Packaging, Labelling and Storage of
Chemical Wastes Waste Disposal (Chemical Waste) (General) Regulation |
||||||
S8.6.32 - S8.6.33 |
General Refuse · Recycling of waste paper, aluminium cans
and plastic bottles should be encouraged, it is recommended to place clearly
labelled recycling bins at designated locations which could be accessed
conveniently. Other general refuse
should be separated from chemical and industrial waste by providing separated
bins for storage to maximize the recyclable volume. |
To separate general refuse from other waste types and
proper disposal of the refuse |
Operator |
All facilities |
Operation Phase |
Public Health and Municipal Services Ordinance (Cap. 132) |
||||||
Impact on Cultural Heritage |
||||||||||||
Construction Phase |
|
|
|
|
|
|||||||
S9.6.4 |
Dust and visual impacts · Temporarily fenced off buffer zone with
allowance for public access (minimum · The open yard in front of the temple
should be kept as usual for annual Tin Hau festival; · Monitoring of vibration impacts should be
conducted when the construction works are less than 100m from the temple. |
To prevent
dust and visual impacts |
Contractors |
Works areas |
Construction
Phase |
EIAO; |
||||||
S9.6.4 |
Indirect
vibration impact ·
Vibration
level is suggest to be controlled within a peak particle velocity
(ppv) limit of 5mm/s measured inside the historical buildings; ·
Monitoring
of vibration should be carried out during construction phase. ·
Tilting
and settlement monitoring should will be applied on the Cha Kwo Ling Tin Hau
Temple as well. ·
A proposal with details for the mitigation
measures and monitoring of impacts on built heritage shall be submitted to
AMO for comments before commencement of work. |
To prevent indirect
vibration impact |
Contractors |
Work areas |
Construction Phase |
Vibration Limits on Heritage Buildings by CEDD; |
||||||
Landscape and Visual Impact |
||||||||||||
Construction Phase |
|
|
|
|
|
|||||||
Table 10.8.1 |
CM1 - Construction area and contractor’s temporary works
areas to be minimised to avoid impacts on adjacent landscape. |
Avoid impact
on adjacent landscape areas |
CEDD (via
Contractor) |
General |
Construction
planning and during construction period |
N/A |
||||||
Table 10.8.1 |
CM2 - Reduction of construction period to practical
minimum. |
Minimise
duration of impact |
CEDD (via
Contractor) |
N/A |
Construction
planning |
N/A |
||||||
Table 10.8.1 |
CM3 - Topsoil, where the soil material meets acceptable
criteria and where practical, to be stripped and stored for re-use in the
construction of the soft landscape works. The Contract Specification shall
include storage and reuse of topsoil as appropriate. |
To allow
re-use of topsoil |
CEDD (via
Contractor) |
General |
Site clearance |
As per the Particular Specification |
||||||
Table 10.8.1 |
CM4 - Existing trees at boundary of site and retained
trees within site boundary to be carefully protected during
construction. Detailed Tree Protection Specification shall be provided in the
Contract Specification, under which 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. (Tree protection measures will
be detailed at Tree Removal Application stage). |
To minimize
tree loss |
CEDD (via
Contractor) |
As per approved Tree Removal Application(s) |
Site clearance
and throughout construction period |
ETWB TC 3/2006 and as per tree protection measures in
Particular Specification |
||||||
Table 10.8.1 |
CM5 - Trees unavoidably affected by the works shall be
transplanted where practicable. Where possible, trees should be transplanted
direct to permanent locations rather than temporary holding nurseries. A
detailed tree transplanting specification shall be provided in the Contract
Specification and sufficient time for preparation shall be allowed in the
construction programme. |
To maximize
preservation of existing trees |
CEDD (via
Contractor) |
As per approved Tree Removal Application(s) |
Site clearance
|
ETWB TC 3/2006 and as per tree protection measures in
Particular Specification |
||||||
Table 10.8.1 |
CM6 - Advance screen planting of fast growing tree and
shrub species to noise barriers and hoardings. Trees shall be capable of
reaching a height >10m within 10 years. |
To maximize
screening of the works |
CEDD (via
Contractor) |
At Lam Tin
Interchange and edge of Road P2 landscape deck, TKO |
Beginning of
construction period |
N/A |
||||||
Table 10.8.1 |
CM7 - Hydroseeding or sheeting of soil stockpiles with
visually unobtrusive material. |
To reduce
visual intrusion |
CEDD (via
Contractor) |
General |
Throughout
construction period |
As per Particular Specification |
||||||
Table 10.8.1 |
CM8 - Control of night-time lighting by hooding all lights
and through minimisation of night working periods. |
To reduce
visual intrusion |
CEDD (via
Contractor) |
General |
Throughout
construction period |
N/A |
||||||
Table 10.8.1 |
CM9 - Screening of works areas with hoardings with
appropriate colours compatible with the surrounding area |
Reduction of
visual intrusion |
CEDD (via
Contractor) |
Project site boundary |
Erection of
site hoardings |
N/A |
||||||
Table 10.8.1 |
CM10 - Avoidance of excessive height and bulk of site
buildings and structures |
Reduction of
visual intrusion and integration with environment |
CEDD (via
Contractor) |
Built structures |
Design and
construction stage |
N/A |
||||||
Table 10.8.1 |
CM11 - Limitation of run-off into freshwater streams, ponds
and sea areas |
Avoidance of
contamination of water courses and water bodies |
CEDD (via
Contractor) |
TKO reclamation, TKO
tunnel portal, Cha Kwo Ling roadworks |
Throughout
construction period |
N/A |
||||||
Table 10.8.1 |
CM12 - Minimise area of reclamation and design
the edges sensitively to tie in with adjacent coastline character |
Minimise loss
of Junk Bay and integration with existing coastline |
CEDD (via
Contractor) |
Temporary reclamation for barging points at TKO and Lam Tin
and permanent reclamation for TKO Interchange slip roads and Road P2 |
Construction
planning and reclamation stages |
N/A |
||||||
Operation Phase |
|
|
|
|
|
|||||||
Table 10.8.2 |
OM1 - Compensatory Tree Planting for all felled trees to
the satisfaction of relevant Government Departments. Required numbers and
locations of compensatory trees shall be determined and agreed separately
with Government during the Tree Felling Application process. |
To mitigate
the loss of existing trees and fulfill Tree Preservation requirements |
CEDD (via
Contractor) |
As per approved Tree Removal Application (s) |
Construction phase |
ETWB TC (W) 3/2006 |
||||||
Table 10.8.2 |
OM2 - Screen tree planting along the site boundary of the
site featuring trees capable of reaching a height >10m within 10 years.
Offsite screen planting by agreement may also be considered should space
within the site be insufficient. |
To mitigate
visual impacts |
CEDD (via
Contractor) |
Site boundaries generally; specifically as per landscape
design construction drawings. |
Construction
phase |
N/A |
||||||
Table 10.8.2 |
OM3 - Slope greening works on all disturbed, new or
reinstated slopes including trees, shrubs, groundcover and climbers. For slopes which
are not feasible for planting, sensitive design of hard landscape treatment
with appropriate material and color should be provided.
The use of unobtrusive colours and tones for all hard elements on slopes
(concrete channels, access stairs, railings, catch pits etc) including
pigmented concrete and paints. |
Slope erosion
control and mitigation of visual impacts |
CEDD (via
Contractor) |
Slopes generally and as per
landscape design construction drawings |
Construction
phase |
GEO 1/2011 – Technical Guidelines on Landscape Treatment
for Slopes |
||||||
Table 10.8.2 |
OM4 - Sensitive
design of buildings and structures in terms of scale, form, height and bulk
(visual weight) |
To mitigate
visual impacts |
CEDD (via
Contractor) |
All built structures |
Design and
construction phase |
N/A |
||||||
Table 10.8.2 |
OM5 - Use
appropriate (visually unobtrusive and non-reflective) building materials and
colours in buildings
and structures. |
To mitigate
visual impacts |
CEDD (via
Contractor) |
All built structures |
Design and
construction phase |
N/A |
||||||
Table 10.8.2 |
OM6 - Streetscape
and highway elements (e.g. paving, signage, street furniture, lighting etc.)
sensitively designed in a manner that responds to the local context, and
minimises potential negative landscape and visual impacts. Lighting units to
be directional and minimise unnecessary light spill. |
To mitigate
visual impacts |
CEDD (via
Contractor) |
Streetscapes associated with modification of existing roads
and new road construction |
Design and
construction phase |
N/A |
||||||
Table 10.8.2 |
OM7 - Greening
measures on elevated road sections. |
To mitigate
visual impacts |
CEDD (via
Contractor) |
Elevated road sections |
Construction/
operation |
ETWB TCW No. 10/2005 |
||||||
Table 10.8.2 |
OM8 - Sensitive
design of footbridges, noise barriers and enclosures with greening (screen
planting/climbers/green roofs) and chromatic measures. |
To mitigate
visual impacts |
CEDD (via
Contractor) |
Footbridges at Road P2, noise barriers at TKO and Lam Tin
Interchanges |
Construction/
operation |
DEVB and Hyd’s Guidelines on greening and design of noise barriers |
||||||
Table 10.8.2 |
OM9 - Additional greening measures for streetscape and buildings
associated with infrastructure for further enhancement and optimization of
the overall greening effect within the Project Area |
To mitigate
visual impacts |
CEDD (via
Contractor) |
Streetscapes , elevated road sections , footbridges at Road
P2, noise barriers at TKO and Lam Tin Interchanges |
Construction/
operation |
DEVB and Hyd’s Guidelines on greening and design of noise barriers |
||||||
Landfill Gas Hazard |
||||||||||||
Design and
Construction Phase |
||||||||||||
S11.5.9 |
A Safety Officer, trained in the use of gas detection
equipment and landfill gas-related hazards, should be present on site
throughout the groundworks phase. The
Safety Officer should be provided with an intrinsically safe portable
instrument, which is appropriately calibrated and able to measure the
following gases in the ranges indicated below:
|
Protect the workers
from landfill gas hazards |
Contractor |
Project sites within the Sai
Tso Wan Landfill Consultation Zone |
Construction
phase |
EPD’s Landfill Gas Hazard
Assessment Guidance Note |
||||||
S11.5.10 -S11.5.25 |
Safety Measures · For staff who work in, or have
responsibility for “at risk” area, such as all excavation workers,
supervisors and engineers working within the Consultation Zone, should
receive appropriate training on working in areas susceptible to landfill gas,
fire and explosion hazards. · An excavation procedure or code of
practice to minimize landfill gas related risk should be devised and carried
out. · No worker should be allowed to work alone
at any time in or near to any excavation.
At least one other worker should be available to assist with a rescue
if needed. · Smoking, naked flames and all other
sources of ignition should be prohibited within 15m of any excavation or
ground-level confined space. “No
smoking” and “No naked flame” notices should be posted prominently on the
construction site and, if necessary, special areas should be designed for
smoking. · Welding, flame-cutting or other hot works
should be confined to open areas at least 15m from any trench or excavation. · Welding, flame-cutting or other hot works
may only be carried out in trenches or confined spaces when controlled by a
“permit to work” procedure, properly authorized by the Safety Officer (or, in
the case of small developments, other appropriately qualified person). · The permit to work procedure should set
down clearly the requirements for continuous monitoring for methane, carbon
dioxide and oxygen throughout the period during which the hot works are in
progress. The procedure should also
require the presence of an appropriately qualified person, in attendance
outside the 'confined area', who should be responsible for reviewing the gas
measurements as they are made, and who should have executive responsibility
for suspending the work in the event of unacceptable or hazardous
conditions. Only those workers who are
appropriately trained and fully aware of the potentially hazardous conditions
which may arise should be permitted to carry out hot works in confined areas. · Where there are any temporary site
offices, or any other buildings located within the Sai Tso Wan Landfill
Consultation Zone which have enclosed spaces with the capacity to accumulate
landfill gas, then they should either be located in an area which has been
proven to be free of landfill gas (by survey using portable gas detectors);
or be raised clear of the ground by a minimum of 500mm. This aims to create a clear void under the
structure which is ventilated by natural air movement such that emission of
gas from the ground are mixed and diluted by air. · Any electrical equipment, such as motors
and extension cords, should be intrinsically safe. · During piping assembly or conduiting
construction, all valves/seals should be closed immediately after
installation. As construction
progresses, all valves/seals should be closed to prevent the migration of
gases through the pipeline/conduit.
All piping /conduiting should be capped at the end of each working
day. · During construction, adequate fire
extinguishing equipment, fire-resistant clothing and breathing apparatus (BA)
sets should be made available on site. · Fire drills should be organized at not
less than six monthly intervals. · The contractor should formulate a health
and safety policy, standards and instructions for site personnel to follow. · All personnel who work on the site and
all visitors to the site should be made aware of the possibility of ignition
of gas in the vicinity of excavations.
Safety notices (in Chinese and English) should be posted at prominent
position around the site warning danger of the potential hazards. · Service runs within the Consultation Zone
should be designated as “special routes”; utilities companies should be
informed of this and precautionary measures should be implemented. Precautionary measures should include
ensuring that staff members are aware of the potential hazards of working in
confined spaces such as manholes and service chambers, and that appropriate
monitoring procedures are in place to prevent hazards due to asphyxiating
atmospheres in confined spaces.
Detailed guidance on entry into confined spaces is given in Code of
Practice on Safety and Health at Work in Confined Spaces (Labour Department,
Hong Kong). · Periodically during ground-works construction
within the 250m Consultation Zone, the works area should be monitored for
methane, carbon dioxide and oxygen using appropriately calibrated portable
gas detection equipment. The
monitoring frequency and areas to be monitored should be set down prior to
commencement of ground-works either by the Safety Officer or an approved and
appropriately qualified person. |
Protect the
workers from landfill gas hazards |
Contractor |
Project sites within the Sai
Tso Wan Landfill Consultation Zone |
Construction
phase |
EPD’s Landfill Gas Hazard Assessment Guidance Note Labour Department’s Code of
Practice for Safety and Health at Work in Confined Space |
||||||
S11.5.26 -S11.5.31 |
Monitoring · Routine monitoring should be carried out
in all excavations, manholes, chambers, relocation of monitoring wells and
any other confined spaces that may have been created. All measurements in excavations should be
made with the extended monitoring tube located not more than 10 mm from the
exposed ground surface. Monitoring
should be performed properly to make sure that the area is free of landfill
gas before any man enters into the area. · For excavations deeper than 1m, measurements should be carried out: - at
the ground surface before excavation commences; - immediately
before any worker enters the excavation; - at
the beginning of each working day for the entire period the excavation
remains open; and - periodically
throughout the working day whilst workers are in the excavation. · For excavations between 300mm and 1m deep, measurements should be carried out: - directly
after the excavation has been completed; and - periodically
whilst the excavation remains open. · For excavations less than 300mm deep, monitoring may be omitted, at the
discretion of the Safety Officer or other appropriately qualified person. · Depending on the results of the
measurements, actions required will vary and should be set down by the Safety
Officer or other appropriately qualified person. · The exact frequency of monitoring should
be determined prior to the commencement of works, but should be at least once
per day, and be carried out by a suitably qualified or qualified person
before starting the work of the day.
Measurements shall be recorded and kept as a record of safe working
conditions with copies of the site diary and submitted to the Engineer for
approval. The Contractor may elect to
carry out monitoring via an automated monitoring system. |
Protect the
workers from landfill gas hazards |
Contractor |
Project sites within the Sai
Tso Wan Landfill Consultation Zone |
Construction
phase |
EPD’s Landfill Gas Hazard
Assessment Guidance Note |
||||||
S11.5.32 |
The hazards from landfill gas during the
construction stage within the Sai Tso Wan Landfill Consultation Zone should
be minimized by suitable precautionary measures recommended in Chapter 8 of the Landfill Gas Hazard
Assessment Guidance Note. |
Protect the
workers from landfill gas hazards |
Contractor |
Project sites within the Sai
Tso Wan Landfill Consultation Zone |
Construction
phase |
EPD’s Landfill Gas Hazard
Assessment Guidance Note |
||||||
S11.5.34 |
Building Protection Design Measures Engineering measures for building structures with ground
level or below ground rooms / voids (such as buildings, plant rooms,
workshops) including the following should be adopted in the detailed design: · Gas-resistant polymeric membranes which
can be incorporated into the floor or wall construction as a continuous
sealed layer. Membranes should be able to demonstrate low gas permeability
and resistant to possible chemical attack and may incorporate aluminum wafers
to improve performance; · Other building materials, e.g. dense
well-compacted concrete or steel shuttering which provide a measure of
resistance to gas permeation; · Creation of a clear void under the
structure which is ventilated by natural structure and provides preferential
pathways for release of gas; · Synthetic composite geotextiles which
provide a free-venting cellular structure and provide preferential pathways
for release of gas; · Provision of mechanical ventilation to
ensure sufficient air change at all time. |
Protect the
operation of the Tseung Kwan O-Lam Tin Tunnel and associated facilities from
landfill gas hazards |
Contractor |
Buildings within the Sai Tso
Wan Landfill Consultation Zone |
Design phase |
EPD’s Landfill Gas Hazard
Assessment Guidance Note |
||||||
S11.5.35 |
Design Measures for Sub-Surface Building Services Generic protection measures for the sub-surface building
services including the following are recommended: · A gas barrier used to prevent movement of
gas through services may form part of a more extensive barrier to prevent
general mitigation towards the development.
The gas barrier may be made of clay (or clay-rich soils), bentonite or
polymeric membranes (e.g. HDPE). In
the case of water pipes and sewers which are not always fully filled, water
traps e.g. U-bends, should be provided to effectively seal off the conduit
and prevent gas-phase transport; · Vent pipes or gridded manhole covers may
be used to avoid build-up of gas in underground utilities manholes. Venting stacks may be built into inspection
chambers or connected to collection pipes in high permeability drainage
layers adjacent to gas barriers. Under
all circumstances, care should be taken when accessing any manhole chambers
especially those which are not fitted with vents and necessary safety
procedures must be followed; and · For building services penetrating through
the ground, collar seal should be adopted to prevent gas ingress into the
room where the service pipes/cables enter the building. |
Protect the
operation of the Tseung Kwan O-Lam Tin Tunnel and associated facilities from
landfill gas hazards |
Contractor |
Sub-surface buildings within
the Sai Tso Wan Landfill Consultation Zone |
Design phase |
EPD’s Landfill Gas Hazard
Assessment Guidance Note |
||||||
S11.5.36 |
Design Measures for Tunnels within Consultation Zone The recommendations given below are designed to reduce the
risk of gas ingress to the tunnels sections that falls within the Sai Tso Wan
Landfill Consultation Zone. · A low permeability gas membrane to be
incorporated into the lining of the tunnel sections that fall within the
landfill Consultation Zone. · Adopt a conservative lapping and sealing
method for the membrane lining and ensure rigorous protection/inspection
measures are enabled during the placement/sealing and joining of the gas
membrane during construction. · Consider the cost-effectiveness of the
use of additional internal join/surface sealants/liners/finishes, etc, with
the proposed construction joint design or pursue superior designs at the
tunnel interface specifically to combat cracking and aid watertightness over
the lifetime of the tunnels. · Provision of mechanical ventilation to
ensure sufficient air change at all time. |
Protect the
operation of the Tseung Kwan O-Lam Tin Tunnel and associated facilities from
landfill gas hazards |
Contractor |
Tunnels within the Sai Tso
Wan Landfill Consultation Zone |
Design phase |
EPD’s Landfill Gas Hazard
Assessment Guidance Note |
||||||
S11.5.37 -S11.5.38 |
Design of LFG Precautionary Measures · When the detailed design of the Project
is available, the detailed design consultant / contractor is required to
undertake review on this assessment taking into account of the more readily
available detailed information to finalize the design of the landfill gas
precautionary measures recommended in this report. The detailed design of gas precautionary
measures and a landfill gas monitoring programme should be submitted to EPD
for vetting. · The design of the landfill gas
precautionary measures to be adopted on-site should be performed by a
competent professional person who has knowledge on LFG precautionary
measures. The design should also be
checked and certified by a qualified independent consultant. The contractor should ensure that the
required precautionary measures are implemented and constructed in accordance
with the design and maintenance and monitoring programme should be
established as a precautionary measure. |
Protect the
operation of the Tseung Kwan O-Lam Tin Tunnel from landfill gas hazards |
Contractor |
All facilities within the Sai
Tso Wan Landfill Consultation Zone |
Design phase |
EPD’s Landfill Gas Hazard
Assessment Guidance Note |
||||||
S11.5.39 |
Along with the detailed precautionary measure
designs, the monitoring programme and detailed actions should be submitted to
EPD for approval in the detailed design stage. |
Review and
agree the detailed precautionary measure designs during the operational phase |
Construction
contractor |
All facilities within the Sai
Tso Wan Landfill Consultation Zone |
Design phase |
EPD’s Landfill Gas Hazard
Assessment Guidance Note |
||||||
Operational Phase |
||||||||||||
S11.5.32 &
S11.5.46 |
In the operational phase, if it is necessary to
carry out construction or maintenance works, landfill gas precautionary
measures same as those recommended for the construction stage above should be
followed. |
Protect the
workers from landfill gas hazards |
Maintenance or
construction contractor |
Construction sites within the
Sai Tso Wan Landfill Consultation Zone |
Operational
phase |
EPD’s Landfill Gas Hazard Assessment
Guidance Note |
||||||
S11.5.40 -S11.5.42 |
Guidance for Entry into Service Rooms / Voids, Manholes and
Chambers · During the operation phase, any service
voids, manholes, chambers or culvert within the proposed site, which is large
enough to permit access to personnel should be subject to entry safety
procedures. Works in confined spaces
are controlled by the Factories and
Industrial Undertakings (Confined Spaces) Regulation of the Factories and Industrial Undertakings
Ordinance and the Code of Practice
for Safety and Health at Work in Confined Space should be followed to
ensure compliance with the Regulation. · In general, when work is being undertaken
in confined spaces, sufficient approved resuscitation equipment, breathing
apparatus and safety torches should be made available. Persons involved in or supervising such work
should be trained and practiced in the use of such equipment. A permit-to-work system for entry into
confined spaces should be developed by an appropriately qualified person and
the system should be consistently employed.
The safety measures recommended in Chapter
8 of the Landfill Gas Hazard Assessment Guidance Note should also be
strictly followed. · All the access to confined spaces should
be restricted only to authorized personnel who are aware of the landfill gas
hazard. No general public should be
permitted or allowed to access the service voids, manholes, chambers or
wells. |
Protect the
workers from landfill gas hazards |
Maintenance
contractor |
Service Rooms / Voids,
Manholes and Chambers within the Sai Tso Wan Landfill Consultation Zone |
Operational
phase |
EPD’s Landfill Gas Hazard Assessment Guidance Note Factories and Industrial Undertakings (Confined Spaces)
Regulation of the Factories and Industrial Undertakings Ordinance Labour Department’s Code of
Practice for Safety and Health at Work in Confined Space |
||||||
S11.5.43-S11.5.45
|
Other Safety Measures and LFG Monitoring During Operation · Operational staff and maintenance workers
should be informed of the potential LFG hazards, and appropriate safety
procedures (such as guidance for entering confined area as indicated above)
should be followed. · During operation, regular monitoring of
methane, carbon dioxide and oxygen should be done at the tunnel, subway, and
any other underground structures within the landfill consultation zone a
precautionary measure. · Inspection and LFG monitoring should be
carried out at buildings and enclosures (e.g. administration building,
ventilation building, workshop, tunnel etc) prior to the operation as
preventive measures. The monitoring
should be continued through the operation of the Project. In particular for the first year of
operation, monthly monitoring is recommended.
Should the monitoring reveal the presence of landfill gas within the
tunnel, buildings or other confined area, the seal of the joints shall be inspected
and consideration shall be given to seal the cracks. |
Protect the workers from landfill gas hazards. |
Operator and
Maintenance contractor |
All facilities within the Sai
Tso Wan Landfill Consultation Zone |
Operational
phase |
EPD’s Landfill Gas Hazard
Assessment Guidance Note |