Table
18.1 Project
Implementation Schedule
|
EIA Ref. |
Recommended Mitigation Measures |
Objectives of the Recommended Measure & Main Concern
to Address |
Who to implement the measure? |
Location of the measure |
When to implement the measure? |
What requirements or standards for the measure to achieve? |
|
A |
Air Quality |
|
|
|
|
|
|
3.64 |
·
Watering twice per
day within the worksites at North Point PTW, Wan Chai East PTW, Fung Mat Road
Site, Sandy Bay PTW, Wah Fu PTW, Aberdeen PTW and SCS worksite at ·
Watering 4 times
per day within worksites at the ·
Barging points, if
any, should be continuous watering throughout the whole unloading process;
and ·
Watering 8 times
per day within worksites at the SCS works area at Wan Chai East and North
Point, SCISTW and the Disinfection Facilities of SCISTW. |
To reduce dust nuisance |
Contractor |
Work site / during
construction |
Construction phase |
EIAO-TM & Air
Quality Objective |
|
3.74 |
Implementation of dust suppression measures stipulated in Air
Pollution Control (Construction Dust) Regulation. The following mitigation measures, good
site practices and a comprehensive dust monitoring and audit programme are
recommended to minimize cumulative dust impacts. ·
Skip hoist for material
transport should be totally enclosed by impervious sheeting; ·
Vehicle washing facilities
should be provided at every vehicle exit point; ·
The area where vehicle washing
takes place and the section of the road between the washing facilities and
the exit point should be paved with concrete, bituminous materials or
hardcore; ·
Where a site boundary adjoins a
road, streets or other areas accessible to the public, hoarding of not less
than 2.4 m high from ground level should be provided along the entire length
except for a site entrance or exit; ·
Use of regular watering, with
complete coverage, to reduce dust emissions from exposed site surfaces and
unpaved roads, particularly during dry weather; ·
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; ·
Imposition of speed controls
for vehicles on unpaved site roads.
Ten kilometers per hour is the recommended limit; ·
Every stock of more than 20
bags of cement should be covered entirely by impervious sheeting placed in an
area sheltered on the top and the 3 sides; ·
Every vehicle should be washed
to remove any dusty materials from its body and wheels before leaving the
construction sites; and ·
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 reduce dust nuisance |
Contractor |
Work site / during
construction |
Construction phase |
EIAO-TM & Air
Quality Objective |
|
3.76 |
Good housekeeping for SCISTW and PTWs listed below should be followed to
ameliorate any odour impact from the plant and these standard practices
should be included in the plant operator manual. ·
Screens should be cleaned
regularly to remove any accumulated organic debris ·
Grit and screening transfer
systems should be flushed regularly with water to remove organic debris and
grit ·
Grit and screened materials
should be transferred to closed containers to minimize odour escape ·
Scum and grease collection
wells and troughs should be emptied and flushed regularly to prevent
putrefaction of accumulated organics ·
Skim and remove floating solids
and grease from primary clarifiers regularly ·
Frequent sludge withdrawal from
tanks is necessary to prevent the production of gases ·
Sludge cake should be
transferred to closed containers ·
Sludge containers should be
flushed with water regularly |
To ensure compliance of
the odour criterion stipulated in the EIAO-TM |
Plant Operator |
All PTWs and
SCISTW |
Operation phase |
EIAO-TM |
|
3.77 |
To avoid excessive extraction of the foul air from the drop shafts of
the sedimentation tanks and also from the effluent flume structure of SCISTW
to deodorization system, the extraction vent(s) of the deodorization system
should be located away from the top openings of the drop shafts. |
To ensure compliance of
the odour criterion stipulated in the EIAO-TM |
Engineer |
SCISTW |
Design Stage |
EIAO-TM |
|
3.80 |
Commissioning tests for all deodorization system should be included in
the Design and Construction Contract Document. |
To ensure compliance of
the odour criterion stipulated in the EIAO-TM |
Engineer |
All PTW and SCISTW |
After completion
of construction |
EIAO-TM |
|
B |
Airborne Noise |
|
|
|
|
|
|
4.56– 4.61 |
Construction
Phase Ÿ
Use of quiet PME, movable barriers
and acoustic mats |
To reduce construction
noise impacts |
Contractor |
All work sites |
Construction phase |
EIAO-TM |
|
4.67 |
Good Site
Practice: Ÿ
Only well-maintained plant shall be operated
on-site and plant shall be serviced regularly during the construction
program. Ÿ
Silencers or mufflers on
construction equipment shall be utilized and shall be properly maintained
during the construction program. Ÿ
Mobile plant, if any, shall be sited
as far away from NSRs as possible. Ÿ
Machines and plant (such as trucks)
that may be in intermittent use shall be shut down between works periods or
shall be throttled down to a minimum. Ÿ
Plant known to emit noise strongly
in one direction shall, wherever possible, be orientated so that the noise is
directed away from the nearby NSRs. Ÿ
Material stockpiles and other
structures shall be effectively utilized, wherever practicable, in screening
noise from on-site construction activities. |
To reduce
construction noise impacts |
Contractor |
All work sites |
Construction phase |
EIAO-TM |
|
4.63 |
Operation
Phase Ÿ
Use of acoustic louvers for air supply fans/extraction
fans of transfer pumping stations and ventilation fans of deodourization unit
at Sandy Bay PTW, Cyberport PTW and Wah Fu PTW. |
To reduce fixed plant noise impact |
DSD |
Sandy Bay PTW,
Cyberport PTW and Wah Fu PTW |
Design stage and
operation stage |
EIAO-TM and NCO |
|
4.64 |
The maximum allowable sound power level
(SWL) of each new transformer at Sandy Bay PTW shall be limited to 89 dB(A). |
To reduce fixed plant noise impact |
DSD |
|
Design stage and operation stage |
EIAO-TM and NCO |
|
C |
Water
Quality |
|
|
|
|
|
|
6.349 to 6.375 |
Construction
Phase Construction Site Runoff and General Construction Activities The
mitigation measures as outlined in the ProPECC
PN 1/94 Construction Site Drainage should be adopted where applicable. |
To control water
quality impact from construction site runoff and general construction
activities |
Contractor |
All work sites |
Construction phase |
EIAO-TM, WPCO |
|
6.376 |
Effluent Discharge 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. 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. Minimum distances of 100
m should be maintained between the discharge points of construction site
effluent and the existing saltwater intakes. |
To control water
quality impact from effluent discharges from construction sites |
Contractor |
All work sites |
Construction phase |
EIAO-TM, WPCO |
|
6.377 |
Accidental Spillage of Chemicals
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. |
To control water
quality impact from accidental chemical spillage |
Contractor |
All work sites |
Construction phase |
EIAO-TM, WPCO, WDO |
|
6.378 |
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 control water
quality impact from accidental chemical spillage |
Contractor |
All work sites |
Construction phase |
EIAO-TM, WPCO, WDO |
|
6.379 |
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: · 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 control water
quality impact from accidental chemical spillage |
Contractor |
All work sites |
Construction phase |
EIAO-TM, WPCO, WDO |
|
6.380 |
Construction Works in Close Proximity of Storm Drains
or Seafront To minimize the potential
water quality impacts from the construction works located at or near any watercourse,
the practices outlined below should be adopted where applicable. ·
The use of less or smaller construction plants may be
specified to reduce the disturbance to the storm water courses or marine
environment. ·
Temporary storage of materials (e.g. equipment, filling
materials, chemicals and fuel) and temporary stockpile of construction
materials should be located well away from any water courses during carrying
out of the construction works. ·
Stockpiling of construction materials and dusty materials should
be covered and located away from any water courses. ·
Construction debris and spoil should be covered up and/or
disposed of as soon as possible to avoid being washed into the nearby water
receivers. ·
Construction activities, which generate large amount of
wastewater, should be carried out in a distance away from the waterfront,
where practicable. ·
Proper shoring may need to be erected in order to prevent
soil/mud from slipping into the storm culvert or sea. |
To control water
quality impact from construction works in close proximity of storm drains or
seafront |
Contractor |
All work sites |
Construction phase |
EIAO-TM, WPCO |
|
6.381 |
Temporary Sewage Bypass It is recommended that the temporary
sewage bypass required for (i) the modification to the existing pumping
station at SCISTW and (ii) the interconnection between the existing main
pumping station and the new pumping station on |
To minimise the water quality impact arising from the planned
temporary sewage bypass |
DSD |
SCISTW |
Design Stage and Construction
Phase |
EIAO-TM and WPCO |
|
6.344 |
Operational Phase Dual power supply, standby
facilities for the main treatment units and standby equipment parts /
accessories should be provided as far as possible at the SCISTW to minimize
the chance of emergency discharge. |
To minimize the
water quality impact from emergency discharge |
DSD |
SCISTW and all the
Stage 2 PTWs |
Design stage and
operation stage |
EIAO-TM and WPCO |
|
6.344 |
The response procedure and monitoring requirements for
emergency discharge as stated in EM&A Manual should be followed. |
To minimize water
quality impact due to emergency discharge |
DSD |
SCISTW |
Operation stage |
EIAO-TM and WPCO |
|
6.345 |
Standby unit(s) and dual (backup) power supply would be
provided at all the Stage 2 PTWs to reduce the risk of equipment breakdown at
the PTWs. |
To minimize water
quality impact due to emergency discharge |
DSD |
Stage 2 PTWs |
Design stage and
operation stage |
EIAO-TM and WPCO |
|
6.346 |
In case of total power outage of the dechlorination
plant, the uninterruptible power supply (UPS) system to be provided would
switch the power supply of the sodium bisulphite dosing pump to a backup
battery almost instantaneously, allowing continuous dosage of sodium
bisulphite for at least half an hour so that sufficient time can be provided
for shutting down the chlorination plant to avoid the possibility of
discharge of chlorinated effluent.
|
To minimize the discharge
of chlorinated effluent under emergency situations |
DSD |
SCISTW |
Design stage and
operation stage |
EIAO-TM and WPCO |
|
6.347 |
The model predicted that if Stage 2B is not implemented
for HATS in 2021 as scheduled, the nutrient contents (both P and N) in the
marine water would ultimately increase to exceed the baseline Stage 1 level
when the HATS flow is reaching its design capacity of 2.45M m3/day.
It is recommended that the future review study for Stage 2B should review the
validity of the model predictions provided in this EIA and confirm the need
of enhanced nutrient removal for HATS after 2021. |
To minimize the
nutrient exceedances after 2021 |
DSD |
SCISTW |
Investigation Stage
of Stage 2B |
EIAO-TM and WPCO |
|
6.348 |
It should be noted that the mixing zone for TIN
predicted for Stage 2B was large with an area of about 30 km2 and
the area of exceedance would encroach on the nearby water sensitive receivers
(e.g. Ma Wan Fish Culture Zone).
This is due to the elevated oxidized nitrogen assumed for the proposed
nitrification process at Stage 2B as well as the increased HATS effluent flow
assumed for Stage 2B. It is recommended that these water quality issues should
be further investigated / assessed under the future EIA for Stage 2B. Further
mitigation measures / alternative treatment designs should also be considered
under the future EIA for Stage 2B to mitigate / minimize the potential TIN
exceedances. |
To minimize the
TIN exceedances during Stage 2B |
DSD |
SCISTW |
Investigation
Stage of Stage 2B |
EIAO-TM and WPCO |
|
D |
Human Health and Ecological Risk |
|
|
|
|
|
|
7.47 & 8.66 |
A monitoring programme
would be implemented to protect human health and ecological resources from
increased TRC and CBP concentrations in seawater. |
To protect human
health and ecological resources from exposure to toxic substances from the
effluent discharges |
DSD |
Water body near
SCISTW |
Operation phase |
|
|
E |
Waste Management |
|
|
|
|
|
|
9.107 |
Reusable steel or concrete panel shutters, fencing
and hoarding and signboard should be used as a preferred alternative to items
made of wood, to minimise wastage of wood. Attention should be paid to WBTC
No. 19/2001 - Metallic Site Hoardings and Signboards to reduce the amount of
timber used on construction sites.
Metallic alternatives to timber are readily available and should be used
rather than new timber. Precast concrete units should be adopted wherever
feasible to minimize the use of timber formwork. |
To minimize
wastage of wood |
Contractor |
Work sites |
Construction phase |
WBTC No. 19/2001 |
|
9.109 |
All waste materials should be segregated into categories covering: Ÿ
excavated materials suitable
for reuse on-site; Ÿ
excavated materials suitable
for public filling facilities; Ÿ
remaining C&D waste for
landfill; Ÿ
chemical waste; and Ÿ
general refuse for landfill. |
To implement
on-site sorting facilitating reuse and recycling of materials as well as
proper disposal of waste. |
Contractor |
Work sites |
Construction phase |
|
|
9.113 |
Recommendations to achieve waste reduction include:- Ÿ
Sort C&D waste from demolition
of existing facilities to recover recyclable portions such as metals; Ÿ
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; Ÿ
Encourage collection of
aluminium cans, PET bottles and paper by providing separate labelled bins to
enable these wastes to be segregated from other general refuse generated by
the work force; Ÿ
Any unused chemicals or those
with remaining functional capacity shall be recycled; and Ÿ
Proper storage and site
practices to minimise the potential for damage or contamination of
construction materials. |
To implement
on-site sorting facilitating reuse and recycling of materials as well as
proper disposal of waste. |
Contractor |
Work sites |
Construction phase |
|
|
9.115 |
Recommendations for good site practices during construction activities
include:- Ÿ
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 Ÿ
Training of site personnel in
proper waste management and chemical waste handling procedures Ÿ
Develop and provide toolbox
talk for on-site sorting of C&D materials to enhance worker’s awareness
in handling, sorting, reuse and recycling of C&D materials. Ÿ
Provision of sufficient waste
disposal points and regular collection of waste Ÿ
Regular cleaning and
maintenance programme for drainage systems, sumps and oil interceptors |
To implement good
site practice for handling, sorting, reuse and recycling of C&D materials |
Contractor |
Work sites |
Construction phase |
Waste Disposal
Ordinance (Cap.54) ETWB TCW No. 19/2005 |
|
9.125 |
Bentonite slurries used in diaphragm wall construction should be
reconditioned and reused wherever practicable. The disposal of residual used
bentonite slurry should follow the good practice guidelines stated in ProPECC
PN 1/94 “Construction Site
Drainage” |
To enhance reuse
of bentonite and proper disposal of residual bentonite slurry. |
Contractor |
Work sites |
Construction phase |
ProPECC PN 1/94 |
|
9.131 |
Adequate number of portable toilets at temporary works areas or the PTWs
to ensure that sewage from site staff would be properly collected. |
To collect sewage
from site staffs properly. |
Contractor |
Work sites |
Construction phase |
|
|
9.133 |
General refuse should be stored in enclosed bins, skips or compaction units
separating from C&D material and disposed of at designated landfill. |
To separate
general refuse from C&D material and proper disposal of the refuse |
Contractor |
Work sites |
Construction phase |
|
|
9.135 |
The recyclable component of the municipal waste generated by the
workforce, such as aluminium 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 materials. |
Contractor |
Work sites |
Construction phase |
|
|
9.137 |
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 approved Chemical Waste Treatment Centre, or another
licensed facility, in accordance with the Waste Disposal (Chemical Waste)
(General) Regulation. |
To proper handling
of chemical waste |
Contractor |
Work
sites |
Construction phase |
Waste Disposal (Chemical Waste) (General) Regulation |
|
9.142 |
Prior to excavation of the marine deposit layer, the deposit should be
tested in accordance with the ETWB TC(W) No. 34/2002 and the results should
be presented in a Preliminary Sediment Quality Report. The marine deposit should
be disposed of at the disposal site designated by the Marine Fill Committee
(MFC) or Director of Environmental Protection (DEP) depending on the test
results. |
To proper disposal
of marine deposit according to the contamination level |
Contractor |
Work sites |
Construction phase |
ETWB TC(W) No.34/2002 |
|
9.148 |
The sludge tanks should be air-tighten. Rotating brushes or other alternative
devises should be installed at the upper frame of the sludge tank washing facilities
to provide better cleaning of the surface around the top loading opening of
the sludge tanks. Prior to making such provision, the top covers of the
sludge transfer tanks should be water cleaned manually after unloading. |
To alleviate
potential odour emitted from sludge tanks |
Operator |
SCISTW |
Operation Phase |
|
|
9.150 |
Since the air tightness of tankers highly relies on the effectiveness
of rubber seals at the loading openings and unloading doors, odour leakage from
tankers are commonly resulted from the aging rubber seals. It is recommended
to develop a preventive maintenance programme for rubber seals of loading
openings and unloading doors of sludge transfer tanks to ensure the tightness
of covers and doors. Rubber seals should be regularly replaced within its
design life as specified by suppliers. |
To control
potential odour emitted from sludge tanks |
Operator |
SCISTW |
Operation Phase |
|
|
G |
Terrestrial Ecology |
|
|
|
|
|
|
10.92 |
All the proposed construction activities would be confined to developed area and
wasteland of very low ecological value. |
To avoid direct impact to any natural habitats identified within the
assessment area. |
Project proponent |
All the works
areas, PTWs and SCISTW |
Design phase of
project |
EIAO TM Annex 16 |
|
10.93 |
To implement effective noise mitigation measures as
recommended in Section 4. |
To minimise noise disturbance impact to the associated wildlife during
the construction phase. |
Contractor |
All the works
areas, PTWs and SCISTW |
Construction phase |
EIAO TM Annex 16 |
|
10.94 |
Dust control practices such as regular watering, complete
coverage of any aggregate or dusty material storage piles, and re-schedule of
dusty activities during high-wind conditions as well as other measures
recommended in Section 3, should be implemented. |
To minimize
indirect dust impact to the nearby vegetation during the construction works. |
Contractor |
All the works
areas, PTWs and SCISTW |
Construction phase |
EIAO TM Annex 16 |
|
10.95 |
Fences/hoardings should be erected and installed
along the boundary of the works areas. |
To minimise disturbance impact to the nearby habitats and the
associated wildlife. |
Contractor |
All the works
areas, PTWs and SCISTW |
Construction phase |
EIAO TM Annex 16 |
|
10.96 |
Standard good site practices as
suggested in Section 10 should be implemented. |
To minimise disturbance impact to the nearby habitats and the
associated wildlife. |
Contractor |
All the works
areas, PTWs and SCISTW |
Construction phase |
EIAO TM Annex 16 |
|
10.97 |
Provision of proper drainage system
and runoff control measures such as use of sand/silt traps, oil/grease
separators, sedimentation tanks, etc. |
To minimise site runoff of high level of sediment solids and other
pollutions from entering the nearby water bodies. |
Contractor |
All the works
areas, PTWs and SCISTW |
Construction phase |
EIAO TM Annex 16 |
|
10.98 |
Provision of compensatory planting of
similar native tree species in no less than 1:1 compensatory ratio in terms
of quality and quantity. |
To compensate removal of individual trees directly affected by
proposed works. |
Contractor |
All the works
areas, PTWs and SCISTW |
Post-construction
phase |
EIAO TM Annex 16
& ETWB TC (Works) No. 3/2006 |
|
H |
Marine Ecology |
|
|
|
|
|
|
11.135 |
To minimize the potential indirect
impacts on water quality from construction site runoff and various construction
activities, the practices outlined in ProPECC PN 1/94 Construction Site
Drainage should be adopted. |
To minimize the
potential indirect impacts on water quality |
Contractor |
All the works
area, PTWs and SCISTW |
Construction Phase |
EIAO-TM |
|
11.136 11.137 |
To avoid/minimize the impact to
corals, it is proposed that they are translocated to the eastern end of the
existing seawall, which has similar hydrographic parameters and supports healthy
growth of the same species and is thus considered as a suitable recipient
site (Figure 11.13).
Coral translocation should be carried out during the winter season
(November-March) in order to avoid disturbance to the transplanted colonies
during the spawning period (i.e. July to October). Dredging works will not be carried
out and sheet piles or silt curtains will be used to contain filling material
used during demolition/re-construction of the seawall. Water quality
modelling predicts that no adverse impact on water quality at the proposed
recipient (Figure
11.13) site would occur during construction works. Following this, no
construction phase monitoring on translocated coral would be required.
However, post-translocation monitoring is suggested to be carried out every 3
months for one year. This would be carried out by a marine ecological specialist
that is approved by the Director. Translocation plan for
corals will be submitted to the Director for approval prior to
the commencement of construction works. . |
To reduce adverse
impacts on coral colonies recorded in the works area by translocation to an
unaffected site. |
Sub-contractor |
|
Pre-construction
phase |
EIAO-TM |
|
11.139 |
It is recommended that temporary
sewage bypass should be programmed to avoid temporary sewage bypass in wet or
bathing season (March to October) in order to minimize the potential impacts.
Relevant government departments including EPD and LCSD should be informed of
the planned sewage bypass prior to any discharge. During the sewage bypass
period, water quality monitoring should be carried out at the water sensitive
receivers to quantify the water quality impacts and to determine when the
baseline water quality conditions are restored. Also, a framework of the response procedures
has been formulated to minimize the impact of temporary discharges. Details
are provided in the standalone EM&A Manual. |
To minimize water
quality impact resulting from planned temporary sewage bypass. |
DSD |
SCISTW |
Design Stage and
Construction Phase |
EIAO-TM and WPCO |
|
11.140 |
Emergency discharges of screened
sewage from PTWs would be the consequence of power or equipment failure at
SCISTW. Dual power supply would be provided at the SCISTW to minimize the
occurrence of power failure. In addition, standby facilities for the main treatment
units and standby equipment parts / accessories would also be provided at the
SCISTW in order to minimize the chance of emergency discharge. To provide a
mechanism to minimise the impact of emergency discharges and facilitate
subsequent management of any emergency, an emergency contingency plan has
been formulated to clearly state the response procedure in case of total
power or equipment failure at SCISTW (details refer to the standalone
EM&A Manual). The plant operators of SCISTW should closely communicate
with relevant departments including EPD and LCSD during the emergency
discharge. An event and action plan and a detailed water quality monitoring
programme for the emergency discharge is given in a standalone EM&A
Manual. |
To minimize water
quality impact due to emergency discharge |
DSD |
SCISTW |
Design stage and
operation stage |
EIAO-TM and WPCO |
|
I |
Landscape and
Visual |
|
|
|
|
|
|
Table
13.7 |
l
Topsoil, where identified, should be stripped and stored for
re-use in the construction of the soft landscape works, where practical. l
Existing trees to be retained on site should be carefully
protected during construction. l
Trees unavoidably affected by the works should be
transplanted where practical. l
Compensatory tree planting should be provided to
compensate for felled trees. l
Control of night-time lighting. l
Erection of decorative screen hoarding compatible with the
surrounding setting. |
To minimise
potential visual intrusion to existing VSRs and compensate the possible loss
of greenery from the Project |
DSD |
All the works
areas, PTWs and SCISTW |
Construction phase |
EIAO-TM Annex 10, 18 ETWB TCW 2/2004 ETWB TCW
No. 3/2006 |
|
Table 13.8 |
l
Aesthetic design of the façade of PTW and associated structures
to harmonize with the surrounding settings. l
Shrub and Climbing Plants to soften proposed structures /
Roof Greening. l
Buffer Tree and Shrub Planting to screen proposed
associated structures. l
Reinstated of disturbed area |
To minimise potential visual
intrusion to existing VSRs and compensate the possible loss of greenery from
the Project |
DSD |
All the works areas,
PTWs and SCISTW |
Operation phase |
EIAO-TM
Annex 10, 18 ETWB TCW 2/2004 ETWB TCW No. 3/2006 |
|
J |
Hazard to Life |
|
|
|
|
|
|
14A.198 & 14A.203 |
Ÿ
Limiting magnitude of ground settlement associated with
shafts & tunnels construction, excavation and seawall demolition to 13mm
and subject to requirements from relevant authorities. |
To prevent damage to gas
facilities with the HKCG Depot |
Contractor |
Vibration and ground
monitoring along boundary of HKCG Depot and perimeter of the gas holder for
the Aberdeen project |
Construction Phase |
|
|
14A.199 & 14A.204 |
Ÿ
Limiting of the vibration levels associated with the
blasting programme for the Tunnel P, shafts and other construction works
(including demolition & reconstruction of seawall, excavation for
seawater pump house at the Aberdeen PTW) at the PTW sites to a peak particle
velocity of 5mm/s and subject to requirements from relevant authorities.
Moving array of sensors will be used as the tunnel is advanced. |
To prevent any structural
damage to HKCG Aberdeen Depot and Ap Lei Chau Shell Depot particularly the
LPG compound. |
Contractor |
Monitoring will be
undertaken at ground level. |
Construction Phase |
|
|
14A.201 |
Ÿ
Limiting use of cranes in terms of locations, lifting
height, swing angle and setting up safety zone. |
To ensure allowable
limits are not exceeded |
Contractor |
Exact location will be
determined on site by the engineer |
Construction Phase |
|
|
14A.205 |
Ÿ
Installation of gas leakage detector/alarm system in LPG
compound at Ap Lei Chau Site. |
To provide early warning
of gas leakage in the LPG facilities |
Contractor |
Exact location will be
determined on site by the contractor with the approval of SHELL. |
Construction Phase |
|
|
14A.206 |
Ÿ
Establish emergency plan and procedures |
To evacuate construction
workers to a safe place during gas leakage in the gas facilities |
Contractor |
Construction sites for |
Construction Phase |
|
|
14C.64 |
Special Chemical Supply Contract Arrangement Ÿ
A separate supply contract will be awarded for each of the
three chemicals (sodium hypochlorite, sodium bisulphite and ferric chloride
solutions). |
To minimize the risk
due to chemicals-related operation |
DSD |
SCISTW |
Operational phase |
|
|
|
Ÿ
Chemical supplier will be required to provide dedicated
transport specifically used for delivering the chemical to be supplied, and the
road tankers will need to be registered with SCISTW. In addition, the supply contract for
sodium hypochlorite will specify that the delivery barge provided will be
dedicated for delivering sodium hypochlorite directly and exclusively from
the supplier’s production plant to SCISTW during the contract period. The
delivery barge will not be allowed to provide other services, such as
carrying other chemical or carrying chemicals to
other facilities other than SCISTW. |
To minimize the risk
due to chemicals-related operation |
Chemical Supplier |
SCISTW |
Operational Phase |
|
|
14C.71-14C.72 |
Dedicated Ÿ
Specific road tanker transport route will be assigned to
each chemical. Ÿ Provide road signs on service road indicating the route to specific chemical storage area. |
To minimize the
risk due to chemicals-related operation |
DSD and chemical
supplier |
SCISTW |
Operational phase |
|
|
14C.73 |
Security of Chemical Loading Points Ÿ
Chemical delivery staff will need to register with SCISTW
staff upon entering the site.
Loading points for ferric chloride, sodium hypochlorite and sodium
bisulphite will be secured by locks and the keys will be kept by SCISTW
staff. The chemical unloading
operation cannot start without presence of SCISTW staff to open the locks. |
To minimize the
risk due to chemicals-related operation |
DSD and chemical
supplier |
SCISTW |
Operational phase |
|
|
14C.77 |
Clear Labelling of Chemicals-related Equipment Ÿ
Provide clear and sufficient signage / labels to indicate
the identity (i.e. for which chemical) of each tank farm and associated
equipment including pipelines, loading points and loading hoses. |
To minimize the
risk due to chemicals-related operation |
Chemical Supplier |
SCISTW |
Operational phase |
|
|
14.C78 |
Ensuring Quality of Chemical Supplier Ÿ
Only appoint chemical suppliers with satisfactory quality
system. Ÿ
Request the chemical supplier to employ an independent
checker to audit the quality and safety management system of the supplier Ÿ
The chemical supplied to SCISTW can only be produced in
designated chemical production plants and delivered directly from designated
locations. This measure will be included in the chemical supply contract. |
To minimize the
risk due to chemicals-related operation |
DSD / chemical
supplier |
N/A |
Operational phase |
|
|
14C.79-14C.84 |
Procedural Control of Chemical Unloading Operation Ÿ
Develop clear procedural controls for barge / road tanker
filling and unloading operation. |
To minimize the
risk due to chemicals-related operation |
DSD |
N/A |
Operational phase |
|
|
|
Ÿ
SCISTW staff will be present at the tank area to receive
the barge / road tanker, check barge / road tanker labels, check the
transport documents carried by the barge crew / road tanker driver, check
type, size and colour of coupling and hose coupler, conduct chemical analysis
to check the identity of delivered chemical and only then authorize the
driver to unload the content. |
To minimize the
risk due to chemicals-related operation |
DSD and Chemical
Supplier |
SCISTW |
Operational phase |
|
|
|
Ÿ
Chemical supplier needs to fax or electronically transmit
copies of delivery bills-of-lading information and barge crew / road tanker
driver identification to SCISTW prior to delivery barge / road tanker
arriving on-site. Such
information will be in compliance with the supplier’s independently
accredited quality assurance system (to ISO:9000 or equivalent). |
To minimize the
risk due to chemicals-related operation |
Chemical Supplier |
SCISTW |
Operational phase |
|
|
|
Ÿ
Conduct chemical analysis to confirm the right chemical is
delivered. The analysis needs to
be conducted by SCISTW staff or independent checker before the chemical is
authorized to be unloaded to the tank farm. |
To minimize the
risk due to chemicals-related operation |
DSD or Independent
Checker |
SCISTW |
Operational phase |
|
|
|
Ÿ
If the coupling of hose connected to the barge / road
tanker is found to be unmatched with the coupling of loading point of tank farm,
chemical unloading operation must not proceed and the situation must be
reported to the SCISTW management for follow-up actions. |
To minimize the
risk due to chemicals-related operation |
DSD and Chemical
Supplier |
SCISTW |
Operational phase |
|
|
|
Ÿ
Chain-of-custody documentation system will be used to
ensure both the supplier (factory) and SCISTW staffs have checked the
chemical identity and the consistency of the chemical analysis result. |
To minimize the risk
due to chemicals-related operation |
DSD and Chemical
Supplier |
Chemical Supply
Factory and SCISTW |
Operational phase |
|
|
14C.88 |
Special Arrangement of SCISTW Public Event Ÿ
Public evens might sometimes be held in SCISTW which allow
access of public to the plant facilities. As a precautionary measure, chemical
delivery operation will be suspended on days of SCISTW public event. Also, public members visiting the
SCISTW will be guided by DSD staff and will not be allowed to visit the area
near the chemical storage locations in SCISTW. |
To minimize the
risk due to chemicals-related operation |
DSD |
SCISTW |
Operational phase |
|
|
14C.167 |
Ÿ
Increase the height to 3.0m of a ( |
To prevent mixing
of ferric chloride and hypochlorite in case of simultaneous failure of
storage tank and pipelines |
DSD |
SCISTW |
Design phase |
|
|
14C.180 |
Mitigation measures during construction protecting the sodium hypochlorite pipelines and ferric chloride tank farm. General: Ÿ
Employ vibration detectors and settlement markers Ÿ
Develop action plan(s) for situations where vibration or
settlement level is found to exceed the set limits Ÿ
Designated delivery route and off-loading area for
delivery trucks Ÿ
Close supervision and monitoring by safety officers. If
there is any construction work within 2m of the pipelines, an immediate
inspection to the pipeline section and the impervious membrane wrapping should be conducted to
ensure no damage to the integrity of the pipeline and the membrane Report any
damage of the disinfection facilities to operators for remedial actions. Ÿ
Provide indication / signs for sodium hypochlorite and
ferric chloride pipelines Ÿ
Regular checking of chemical delivery pipelines Ÿ
Provide a physical barrier between the sodium hypochlorite
tanks and the ferric chloride tanks during the construction stage before the
new above ground structures for HATS Stage Other construction activities: Ÿ
Excavation running close or parallel to sodium
hypochlorite delivery pipelines and associated impervious membrane wrapping
under road / pavement shall be avoided as far as possible Ÿ
Use bore piles instead of percussion piles in order to
keep vibration to a minimum Ÿ
Maximise the distance between piling and delivery
pipelines, as well as the associated impervious membrane wrapping. Monitor
vibration resulted from construction works to ensure the velocity and
amplitude of vibration limit will not be exceeded Ÿ
Conduct hazard assessment for E&M installation and
obtain Hot Work Permit before starting welding / hot works Ÿ
Check and certify the stability of the construction
equipment Ÿ
Location of any large-scale or high-elevated equipment
should be agreed with SCISTW operator before delivery Ÿ
Confine hot works in designated areas. Ÿ
Area within the boundaries of chemical storage facilities
are subject to hazardous area control Ÿ
Maximise the distance between the tunnel shaft and
delivery pipelines |
To minimize the
risk of damaging the disinfection facilities |
Contractor |
Construction Site
at SCISTW |
Construction phase
|
|
|
K |
Cultural Heritage |
|
|
|
|
|
|
Tables 15.8 -
15.11 |
Ÿ
The construction vibration control limit (ppv of 25mm/s)
shall be strictly followed. |
To minimize vibration
impacts on the identified vibration sensitive historical buildings. |
Project Proponent |
Identified
historical buildings/structures as mentioned in Tables 15.8, 15.9, 15.10 and
15.11 |
During blasting
for tunnel, shafts, effluent conveyance system and disinfection facilities in
the vicinity of the buildings/ structures |
|
|
15.70 |
Ÿ
Monitoring of vibration limits shall be conducted and
reported as a requirement of EM&A programme |
To ensure that acceptable
vibration limits for historical buildings are not exceeded |
Project Proponent |
Identified
historical buildings/structures as mentioned in Tables 15.8, 15.9, 15.10 and
15.11 |
During blasting
for tunnel, shafts, effluent conveyance system and disinfection facilities in
the vicinity of the buildings/ structures |
|