Table 8.1 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? |
|
Water Quality Impact (Construction Phase) |
|
|
|
|
|
||
S3.142 |
Dredging
should be carried out by closed grab dredger. |
To
minimize release of sediment and contaminants during dredging. |
Contractor |
Dredging works areas in
Causeway Bay Typhoon Shelter (CBTS) |
Construction
Phase |
EIAO-TM, WPCO |
|
S3.142 |
All
temporary reclamation works should adopt an approach where temporary seawalls
will first be formed to enclose each phase of the temporary reclamation. Installation of diaphragm wall on temporary
reclamation as well as any bulk filling will proceed behind the completed
seawall. Any gaps that may need to be
provided for marine access should be shielded by silt curtains to control
sediment plume dispersion away from the site.
Demolition of temporary reclamation including the demolition of the
diaphragm wall and dredging to the existing seabed levels should be carried
out behind the temporary seawall.
Temporary seawall should be removed after completion of all excavation
and dredging works for demolition of the temporary reclamation. |
To
minimize loss of fines and contaminants during temporary reclamations |
Contractor |
Temporary reclamation
works areas in CBTS |
Construction
Phase |
EIAO-TM, WPCO |
|
S3.142 |
During
construction of the temporary reclamation, temporary seawall should be
partially constructed to protect the nearby seawater intakes from further
dredging activities. For example, the
seawalls along the southeast and northeast boundaries of PW1.1 should be
constructed first (above high water mark) so that the seawater intake at the
inner water would be protected from the impacts from the remaining dredging
activities along the northwest boundary. |
To
minimize water quality impact upon the cooling water intakes in CBTS from
temporary reclamation works |
Contractor |
Temporary reclamation works areas in CBTS |
Construction
Phase |
EIAO-TM, WPCO |
|
S3.142 |
Silt
curtains should be deployed to fully enclose the closed grab dredger during
any dredging operation within the CBTS. |
To
minimize loss of fines and contaminants during dredging in CBTS |
Contractor |
Dredging works areas in CBTS |
Construction
Phase |
EIAO-TM, WPCO |
|
S3.142 |
Silt
screens will be installed at all the cooling water intakes within the CBTS
during temporary reclamation and dredging within the typhoon shelter. |
To
minimize water quality impact upon the cooling water intakes in CBTS from
marine construction activities |
Contractor |
Cooling water intakes inside CBTS |
Construction
Phase |
EIAO-TM, WPCO |
|
S3.143 |
No more
than two closed grab dredgers should be operated for dredging within the CBTS
at any time. Moreover, the combined
production rate of all concurrent dredging works to be undertaken within the
CBTS shall not exceed 6,000 m3 per day at all times throughout the
entire construction period. |
To
minimize loss of fines and contaminants during dredging in CBTS |
Contractor |
Temporary reclamation and dredging works areas in CBTS |
Construction
Phase |
EIAO-TM, WPCO |
|
S3.145 |
The following good site practices should be undertaken during sand filling, public filling and dredging: mechanical grabs,
if used, should 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 should 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 should be fitted with tight fitting seals to their
bottom openings to prevent leakage of material; construction
activities should not cause foam, oil, grease, scum, litter or other objectionable
matter to be present on the water within the site or dumping grounds; and loading of
barges and hoppers should be controlled to prevent splashing of dredged
material into the surrounding water.
Barges or hoppers should not be filled to a level that will cause the
overflow of materials or polluted water during loading or transportation. |
To
minimize loss of fines and contaminants from dredging / filling |
Contractor |
Temporary reclamation and dredging works areas in CBTS |
Construction
Phase |
EIAO-TM, WPCO |
|
S3.146 |
Temporary
storage of construction materials (e.g. equipment, filling materials,
chemicals and fuel) and temporary stockpile of construction and demolition
materials should be located well away from the seawater front and storm
drainage during carrying out of the works. Stockpiling
of construction and demolition materials and dusty materials should be
covered and located away from the seawater front and storm drainage. Construction
debris and spoil should be covered up and/or disposed of as soon as possible
to avoid being washed into the nearby receiving waters. |
To
minimize release of construction wastes from construction works at or close
to the seafront |
Contractor |
Construction works at or close to
the seafront |
Construction
Phase |
EIAO-TM, WPCO |
|
S3.147 |
Silt
curtains should be installed around the working area for the marine piling
works for construction of the temporary jetty as necessary to minimize the
release of sediment and construction wastes. All wastewater generated from
the piling activities should be collected by a derrick lighter or other
collection system and be treated before controlled discharge. Spoil from the
piling activities should be collected by sealed hopper barges for proper
disposal. |
To
minimize water quality impacts from piling works for construction of the
temporary jetty |
Contractor |
Piling area at the piling location |
Construction
Phase |
EIAO-TM, WPCO |
|
S3.148 |
Regular
maintenance and refuse collection should be performed at the silt screens
deployed at the seawater intakes at regular intervals on a daily basis. The Contractor should be responsible for
keeping the water behind the silt screen free from floating rubbish and
debris during the impact monitoring period. |
To
avoid the pollutant and refuse entrapment problems at the silt screens to be
installed at the water intakes |
Contractor |
Proposed silt screens at cooling water intakes inside CBTS |
Construction
Phase |
EIAO-TM, WPCO |
|
S3.149 |
Collection
and removal of floating refuse should be performed within the marine
construction areas 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 during the dredging works. |
To
minimize water quality impacts from illegal dumping and littering from marine
vessels and runoff from the coastal areas |
Contractor |
All marine works areas |
Construction
Phase |
EIAO-TM, WPCO, WDO |
|
S3.150
to 3.169 |
To
minimize water quality impacts from construction site runoff and general
construction activities |
Contractor |
All construction works areas |
Construction
Phase |
EIAO-TM, WPCO, TM-DSS, WDO, ProPECC
PN 1/94 |
||
S3.170 |
There is a need to apply to EPD for
a discharge licence for discharge of effluent from the construction site
under the WPCO. The discharge quality
must meet the requirements specified in the discharge licence. All the runoff and wastewater generated
from the works areas should be treated so that it satisfies all the standards
listed in the TM-DSS. Minimum
distances of 100 m should be maintained between the discharge points of
construction site effluent and the existing seawater intakes. The beneficial uses of the treated effluent
for other on-site activities such as dust suppression, wheel washing and
general cleaning etc., can minimise water consumption and reduce the effluent
discharge volume. If monitoring of the
treated effluent quality from the works areas is required during the
construction phase of the Project, the monitoring should be carried out in
accordance with the WPCO license which is under the ambit of Regional Office
(RO) of EPD. |
To
minimize water quality impact from effluent discharges from construction
sites |
Contractor |
All construction works areas |
Construction
Phase |
EIAO-TM, WPCO, TM-DSS |
|
S3.171
& 3.172 |
Construction
work force sewage discharges on site are expected to be connected to the
existing trunk sewer or sewage treatment facilities. If disposal of sewage to public sewerage
system is not feasible, appropriate numbers of portable toilets shall be
provided by a licensed contractor to serve the construction workers over the
construction site to prevent direct disposal of sewage into the water
environment. The Contractor shall also
be responsible for waste disposal and maintenance practices. |
To
minimize water quality impacts due to sewage generated from construction
workforce |
Contractor |
All construction works areas |
Construction
Phase |
EIAO-TM, WPCO, TM-DSS, WDO |
|
S3.173 |
To
minimize water quality impact from accidental spillage of chemical |
Contractor |
All construction works areas |
Construction
Phase |
EIAO-TM, WPCO, TM-DSS, WDO |
||
S3.174 |
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. |
To
minimize water quality impact from accidental spillage of chemical |
Contractor |
All construction works areas |
Construction
Phase |
EIAO-TM, WPCO, TM-DSS, WDO |
|
S3.175 |
Suitable
containers should be used to hold the chemical wastes to avoid leakage or
spillage during storage, handling and transport. Chemical
waste containers should be suitably labelled, to notify and warn the
personnel who are handling the wastes, to avoid accidents. Storage
area should be selected at a safe location on site and adequate space should
be allocated to the storage area. |
To
minimize water quality impact from accidental spillage of chemical |
Contractor |
All construction works areas |
Construction
Phase |
EIAO-TM, WPCO, TM-DSS, WDO |
|
Noise Impact (Construction Phase) |
|
|
|
|
|
||
S4. 30 |
The following good site practices should be implemented: 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 from NSRs as possible Machines
and plant (such as trucks) that may be in intermittent use should be shut
down between work 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 reduce construction noise impact |
Contractor |
All works areas |
Construction phase |
EIAO-TM, NCO |
|
S4.31 – S4.32 & Table 4.7 |
The following quiet PME are recommended for the
construction activities: ·
Air Compressor ·
Bulldozer ·
Concrete Pump ·
Concrete Lorry Mixer ·
Crane ·
Dump Truck
·
Excavator ·
Generator ·
Hand-held Breaker ·
Poker Vibrator ·
Roller ·
Trucks |
To reduce construction noise impact |
Contractor |
All works areas |
Construction phase |
EIAO-TM, NCO |
|
S4.33 – S4.35 & Table 4.8 |
Movable noise barrier should be used for
the following PME: ·
Air Compressor ·
Bar Bender ·
Bentonite Plants ·
Concrete pump ·
Diaphragm Wall Rigs ·
Excavator ·
Poker Vibrator |
To reduce construction noise impact |
Contractor |
Affected works areas showing exceedance during un-mitigated scenario |
Construction phase |
EIAO-TM, NCO |
|
Construction Dust Impact |
|
|
|
|
|
||
S5.43 |
Watering once on construction areas for every working hour |
To minimize dust
impact |
Contractor |
Temporary reclamation area in CBTS |
Construction phase |
APCO |
|
S5.43 |
Covering/paving the southwest retained area of temporary reclamation
once filling is completed |
To minimize dust
impact |
Contractor |
southwest retained area of temporary
reclamation |
Construction phase |
APCO |
|
S5.44 |
Dust suppression measures stipulated in the Air
Pollution Control (Construction Dust) Regulation and good site practices: Use of
regular watering, with complete coverage, to reduce dust emissions from
exposed site surfaces and unpaved roads, particularly during dry weather. Use of
frequent watering for particularly dusty construction areas and areas close
to ASRs. Side
enclosure and covering of any aggregate or dusty material storage piles to
reduce emissions. Where this is not
practicable owing to frequent usage, watering shall be applied to aggregate
fines. Open stockpiles
shall be avoided or covered. Where
possible, prevent placing dusty material storage piles near ASRs. Tarpaulin
covering of all dusty vehicle loads transported to, from and between site
locations. Establishment
and use of vehicle wheel and body washing facilities at the exit points of
the site. Provision
of wind shield and dust extraction units or similar dust mitigation measures
at the loading points, and use of water sprinklers at the loading area where
dust generation is likely during the loading process of loose material,
particularly in dry seasons/ periods. Provision
of not less than 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 dust impacts |
Contractor |
Temporary reclamation area in CBTS |
Construction phase |
APCO and Air Pollution Control (Construction
Dust) Regulation |
|
Waste Management Implications (Construction Phase) |
|
|
|
|
|
||
6.62 |
Good Site Practices and
Waste Reduction Measures - Prepare
a Waste Management Plan approved by the Engineer/Supervising Officer of the
Project based on current practices on construction sites; - 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; - Regular
cleaning and maintenance programme for drainage systems, sumps and oil
interceptors; and - Separation
of chemical wastes for special handling and appropriate treatment. |
To enhance water management practice and achieve waste
reduction. |
Contractor |
All Work Sites |
Construction
Phase |
Waste Disposal Ordinance (Cap. 354) Land (Miscellaneous Provisions) Ordinance (Cap. 28) ETWB TC(W) No.31/2004 |
|
6.63 |
Good Site Practices and
Waste Reduction Measures (con’t) - Sorting
of demolition debris and excavated materials from demolition works to recover
reusable/ recyclable portions (i.e. soil, broken concrete, metal etc.); - 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 aluminum cans by providing separate labeled 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; - Plan
and stock construction materials carefully to minimize amount of waste
generated and avoid unnecessary generation of waste; and - Training
should be provided to workers about the concepts of site cleanliness and
appropriate waste management procedures, including waste reduction, reuse and
recycle. |
To achieve waste reduction |
Contractor |
All Work Sites |
Construction
Phase |
Waste Disposal Ordinance (Cap. 354) Land (Miscellaneous Provisions) Ordinance (Cap. 28) |
|
6.64 |
Good Site Practices and Waste Reduction
Measures (con’t) - The
Contractor shall prepare and implement an EMP in accordance with ETWB TCW No.
19/2005. Such 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, preferably in a monthly
basis. |
To enhance water management practice and achieve waste
reduction. |
Contractor |
All Work Sites |
Construction
Phase |
ETWB TCW No. 19/2005 |
|
6.66 |
Storage, Collection and
Transportation of Waste - 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 |
Work Sites |
Construction
Phase |
- |
|
6.67 |
Storage, Collection and
Transportation of Waste (con’t) - Waste
haulier with appropriate permits should be employed by the Contractor for the
collection and transportation of waste from works areas to respective
disposal outlets. |
To minimize potential adverse environmental impacts arising
from waste collection and disposal |
Contractor
|
Waste storage area. |
Construction
Phase |
- |
|
6.68 |
Storage, Collection and
Transportation of Waste (con’t) - Implementation
of trip ticket system with reference to ETWB TC(W)
No.31/2004 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 |
Work Sites |
Construction
Phase |
ETWB TC(W) No.31/2004 |
|
6.70
– 6.73 |
Sorting of C&D
Materials - Sorting
to be performed to recover the inert materials, reusable and recyclable
materials before disposal off-site. - Specific
areas should 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 as far as
practicable before delivery to PFRFs as mentioned for beneficial use in other
projects. While opportunities for
reusing the non-inert portion should be investigated before disposal of at
designated landfills. - Possibility
of reusing the spoil in the Project will be continuously investigated in the construction
stage. |
To minimize potential adverse environmental impacts
during the handling, transportation and disposal of C&D materials |
Contractor |
All work Sites |
Construction
Phase |
ETWB TCW No. 31/2004 ETWB TCW No. 33/2002 ETWB TCW No. 19/2005 |
|
6.75 |
Sediments - The
basic requirements and procedures for dredged sediment disposal specified
under PNAP 252 shall be followed. MFC manages disposal facilities in |
To ensure the sediment to be disposed of in an
authorized and least impacted way |
Contractor |
All works areas with sediments concern |
Construction
Phase |
PNAP 252 |
|
6.76 |
Sediments (con’t) - The
Project Proponent should agree in advance with MFC of CEDD on the site
allocation by submitting a Construction & Demolition Material Management
Plan. The contractor for the dredging works shall then apply for the site
allocations of marine sediment disposal based on the prior agreement with
MFC/CEDD. A request for reservation of sediment disposal space has been
submitted to MFC for onward discussions of disposal approaches and feasible
disposal sites. The Project Proponent is also responsible for application of
all necessary permits from the relevant authorities, including the dumping
permit as required under DASO from EPD, for the disposal of dredged sediment
prior to the commencement of the dredging works. |
To determine the best handling and disposal option of
the sediments |
MTR
/ Contractor |
All works areas with sediments concern |
Prior
to the start of dredging works |
PNAP 252; Dumping at Sea Ordinance |
|
6.77
– 6.81 |
Sediments (con’t) - Requirements
of the Air Pollution Ordinance (Construction Dust) Regulation, where
relevant, shall be adhered to during dredging, transportation and disposal of
sediments. - Stockpiling
of contaminated sediments should be avoided as far as possible. If temporary
stockpiling of contaminated sediments is necessary, the dredged 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/or 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 dredging and
transportation of the sediment, the dredged sediments should be properly
covered when placed on barges. Loading
of the dredged 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 wear
appropriate personal protective equipments (PPE) when handling contaminated
sediments. Adequate washing and
cleaning facilities should also be provided on site. |
To ensure handling
of sediments are in accordance to statutory requirements |
Contractor |
Work Sites, Sediment disposal sites |
Construction
Phase |
PNAP 252 Dumping at Sea Ordinance |
|
6.82 |
Sediments (con’t) The dredging work and associate sediment handling under
this Project will be undertaken together with the CWB project by Highways
Department and geosynthetic containment will be adopted to handle Type 3
sediments. |
To ensure handling
of sediments are in accordance to statutory requirements |
Contractor |
Work Sites, Sediment disposal sites |
Construction
Phase |
PNAP 252 Dumping at Sea Ordinance |
|
6.86 |
Containers for Storage of
Chemical Waste The Contractor should register with 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. Containers used for storage of
chemical waste should: - Be
compatible with the chemical wastes being stored, maintained in good
condition and securely sealed; - Have
a capacity of less than 450 litters unless the specifications have been
approved by EPD; and - Display
a label in English and Chinese in accordance with instructions prescribed in
Schedule 2 of the Waste Disposal (Chemical Waste) (General) Regulation. |
To register with EPD as a Chemical waste producer and
store chemical waste in appropriate containers |
Contractor |
Chemical waste
storage area |
Construction
Phase |
Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes |
|
6.87 |
Chemical Waste Storage
Area - Be
clearly labeled to indicate corresponding chemical characteristics of the
chemical waste and used for storage of chemical waste only; - Be
enclosed on at least 3 sides; - Have
an impermeable floor and bunding, of capacity to accommodate 110% of the
volume of the largest container or 20% by volume of the chemical waste stored
in that area, whichever is the greatest; - Have
adequate ventilation; - Be
covered to prevent rainfall from entering; and - Be
properly arranged so that incompatible materials are adequately separated. |
To prepare appropriate
storage areas for chemical waste at works areas |
Contractor |
Chemical waste
storage area |
Construction
Phase |
Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes |
|
6.88 |
Labelling of Chemical
Waste - Lubricants,
waste oils and other chemical wastes would be generated during the
maintenance of vehicles and mechanical equipments. Used lubricants should be collected and
stored in individual containers which are fully labeled in English and
Chinese and stored in a designated secure place. |
To clearly label the chemical waste at works areas |
Contractor |
Chemical waste
storage area |
Construction
Phase |
Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes |
|
6.89 |
Collection and Disposal of
Chemical Waste - A
trip-ticket system should be operated in accordance with the Waste Disposal (Chemical Waste) (General)
Regulation to monitor all movements of chemical waste. The Contractor shall employ a licensed
collector to transport and dispose of the chemical wastes, to either the
approved CWTC at Tsing Yi, or another licensed facility, in accordance with
the Waste Disposal (Chemical Waste)
(General) Regulation. |
To monitor the generation, reuse and disposal of chemical
waste |
Contractor |
Work Sites with chemical
waste production |
Construction
Phase |
Waste Disposal (Chemical Waste) (General) Regulation |
|
6.90 |
General Refuse - General
refuse should be stored in enclosed bins or compaction units separate from
C&D materials and chemical waste.
A reputable waste collector should be employed by the contractor to
remove general refuse from the site, separately from C&D materials and
chemical wastes. Preferably, an
enclosed and covered area should be provided to reduce the occurrence of
windblown light material. |
To properly store and separate from other C&D materials
for subsequent collection and disposal |
Contractor |
All Work Sites |
Construction
Phase |
- |
|
6.91 |
General Refuse (con’t) - The
recyclable component of general refuse, such as aluminum cans, paper and
cleansed plastic containers should be separated from other waste. Provision and collection of recycling bins
for different types of recyclable waste should be set up by the
Contractor. The Contractor should also
be responsible for arranging recycling companies to collect these materials. |
To facilitate recycling of recyclable portions of refuse |
Contractor |
All Work Sites |
Construction
Phase |
- |
|
6.92 |
General Refuse (con’t) - The
Contractor should carry out an education programme for workers in avoiding,
reducing, reusing and recycling of materials generation. Posters and leaflets advising on the use of
the bins should also be provided in the sites as reminders. |
To raise workers’ awareness on recycling issue |
Contractor |
All Work Sites |
Construction
Phase |
- |
|