11.1.1.1 This section presents the implementation schedule of the recommended mitigation measures for the drainage improvement works at Ngong Ping. Table 11.1 summarises the details of the mitigation measures, which should be implemented as far as practicable in the project areas as specified. For each of the recommended mitigation measures, both the location and timing for the measures, and the parties responsible for implementing the measures and for maintenance, have been identified.
Table 11.1 Implementation
Schedule for Environmental Mitigation Measures
|
EIA Reference |
EM&A Manual Reference |
Environmental
Protection Measures |
Objectives of
Measures and Main Concern to Address |
Location |
Implementation
Agent |
Relevant Standard
or Requirement |
Implementation Stages* |
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|
D/PC |
C |
O |
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|
Air Quality |
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|
3.8.2.1 |
2.3.1.1 |
Watering once per hour for 12 hours a day at exposed
soil in all active works areas and paved haul roads to reduce dust emissions
by 91.7%. The amount of water to be
applied would be 0.25L/m2 for the respective watering frequency. |
To minimise dust impacts |
All works sites |
Contractor and Sub-contractors |
EIAO, Air Pollution Control Ordinance |
|
ü |
|
|
3.8.2.2 |
2.3.1.2 |
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. 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; § Imposition of
speed controls for vehicles on unpaved site roads, 8 km per hour is the
recommended limit; § Routing of
vehicles and position 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; § Cement or dry PFA
delivered in bulk should be stored in a closed silo fitted with an audible
high level alarm which is interlocked with the material filling line and no
overfilling is allowed; and § Loading,
unloading, transfer, handling or storage of bulk cement or dry PFA should be
carried out in a totally enclosed system or facility, and any vent or exhaust
should be fitted with an effective fabric filter or equivalent air pollution
control system. |
To minimise dust impacts |
All works sites |
Contractor and Sub-contractors |
Air Pollution Control Ordinance |
|
ü |
|
|
Noise |
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|
4.8.2.2 & 4.8.2.3 |
3.5.1.1 |
The use of quieter plant (QPME) is specified for the
list of equipment: § Tracked excavator
fitted with hydraulic rock breaker; § Concrete lorry
mixer; § Tracked mobile
crane (132kW, 55t); § Dump Truck; § Tracked excavator
(14t); § Generator, Super
Silenced, 70 dB(A) at 7m; § Poker vibratory; § Hand Held Electric
Circular Saw, 150mm Blade with SWL of 103dB(A) or less; § Electric
Chain-Saw, Hand-held; and § Water Pump, Submersible
(Electric). |
To minimise noise impacts |
All works sites |
Contractor and Sub-contractors |
EIAO, Noise Control Ordinance |
|
ü |
|
|
4.8.2.4 & 4.8.2.5 |
3.5.1.1 |
For the Columbarium (NSR1), the vertical gaps along
of edge of the solid boundary wall facing the works area WA4 should be
covered with acoustic fabric or small barrier for noise screening. |
To minimise noise impacts |
The boundary wall of Columbarium (NSR1) that facing
construction works sites |
Contractor and Sub-contractors |
EIAO, Noise Control Ordinance |
|
ü |
|
|
4.8.2.6 & 4.8.2.7 |
3.5.1.1 |
The use of temporary noise barrier / enclosure are
specified for the list of equipment: § Bar Bender and
Cutter (Electric) - Noise Enclosure § Tracked excavator
fitted with hydraulic rock breaker - Temporary Noise barrier; § Tracked excavator
(14t) - Temporary Noise barrier § Generator, Super
Silenced, 70 dB(A) at 7m - Noise Enclosure; and § Hand Held Electric
Circular Saw, 150mm Blade - Noise Enclosure. |
To minimise noise impacts |
All works sites |
Contractor and Sub-contractors |
EIAO, Noise Control Ordinance |
|
ü |
|
|
4.8.3.4, 4.8.3.5 & 4.8.3.6 |
3.5.1.1 |
Installation of a fixed noise barrier of 3m in
height between the NSR5 and the open cut trench (Activities 4 and 4+ at Works
Section 5) |
To minimise noise impacts |
Works Section 5 and within 22m range from Village
House No. 49A (NSR5) |
Contractor and Sub-contractors |
EIAO, Noise Control Ordinance |
|
ü |
|
|
4.8.3.7 |
3.5.1.1 |
Implementation of further good site practices: § Only
well-maintained plant should be operated on-site and PME should be serviced
regularly during the construction programme; § Silencers or
mufflers on construction equipment should be utilised and properly maintained
throughout the construction programme; § Any mobile PME
should be sited as far from NSRs as possible; § Machines and PME
that may be in intermittent use should be shut down between work periods or
should be throttled down to a minimum; § PME known to emit
noise strongly in one direction should be orientated to direct away from the
nearby NSRs; § Material
stockpiles and other structures should be effectively utilised, wherever
practicable, in screening noise from on-site construction activities; § Use of acoustic
enclosure, in accordance with EPD’s A Practical Guide for the Reduction of
Noise from Construction Works; and § Re-scheduling of
works should be considered to ameliorate the residual impact. |
To minimise noise impacts |
All works sites |
Contractor and Sub-contractors |
EIAO, Noise Control Ordinance |
|
ü |
|
|
Water Quality |
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|
5.8.8.1 |
4.11.2.1 |
In accordance with the Practice Note for
Professional Persons on Construction Site Drainage, Environmental Protection
Department, 1994 (ProPECC PN 1/94), construction phase mitigation measures
shall include the following: § At the
establishment of Site Office (SO), works area (WA1 and WA2) and stockpiling
areas (SA1, SA2, SA3 and SA4; (see Figures 2.9a-2.9g), perimeter cut-off
drains to direct off-site water around the site should be constructed with
internal drainage works and erosion and sedimentation control facilities
implemented. Channels (both temporary and permanent drainage pipes and
culverts), earth bunds or sand bag barriers should be provided to divert the
stormwater to silt removal facilities.
The design of the temporary on-site drainage system will be undertaken
by the Contractor prior to the commencement of construction; § Dikes or
embankments for flood protection should be implemented around the boundaries
of earthwork areas. Temporary ditches should be provided to facilitate the
runoff discharge into an appropriate watercourse, through a site/sediment
trap. Sediment/silt traps should be incorporated in the permanent drainage
channels to enhance deposition rates; § While ProPECC PN
1/94 requires construction works should be programmed to minimise surface
excavation works during rainy seasons (April to September). By the nature of
the pipe laying works, it is considered not practicable to avoid excavation
works in the wet season as this would substantially affect the overall
construction programme. However, for works at areas that directly interface
with the existing watercourses, excavation works shall avoid the rainy season
as far as possible. These include
Intake A interfacing the stream, Intake B interfacing the U channel, Outfall
A interfacing the gabion channel, Intake C/RP3 interfacing the gabion channel
and Outfall B/RP4 interfacing Ngong Ping Stream (see Figures 2.9a-2.9g). For the works in the above listed areas, an
impermeable cofferdam or similar barrier to the level above the stream bank
shall be erected to completely enclose these areas before any works are
undertaken. This will ensure that any
contaminated runoff from the works areas will not get into the ambient
watercourses. These barriers shall not be removed until the interfacing works
and the relevant upstream connected drains have been completed. All exposed
earth areas should be completed and vegetated as soon as possible after the
earthworks have been completed, or alternatively, within 14 days of the
cessation of earthworks where practicable;
§ Exposed slope
surfaces should be covered by tarpaulin or other means during the rainy
season; § The design of
efficient silt removal facilities should be based on the guidelines in
Appendix A1 of ProPECC PN 1/94, which states that the retention time for
silt/sand traps should be 5 minutes under maximum flow conditions. The sizes may vary depending upon the flow
rate, but for a flow rate of 0.1m3/s, a sedimentation basin of 30m3 would be
required and for a flow rate of 0.5m3/s the basin would be 150m3. The
detailed design of the sand/silt traps should be undertaken by the contractor
prior to the commencement of construction; § The overall slope
of works sites should be kept to a minimum to reduce the erosive potential of
surface water flows, and all trafficked areas and access roads should be protected
by coarse stone ballast. An additional
advantage accruing from the use of crushed stone is the positive traction
gained during the prolonged periods of inclement weather and the reduction of
surface sheet flows; § All drainage
facilities and erosion and sediment control structures should be regularly
inspected and maintained to ensure their proper and efficient operation at
all times particularly following rainstorms.
Deposited silts and grits should be removed regularly and disposed of
proper waste receiving facilities. As the area is within the water gathering
grounds, on-site disposal of silts/grits shall not be allowed; § Measures should be
taken to minimise the ingress of site drainage into excavations. If the excavation of trenches in wet season
is inevitable, they should be dug and backfilled in short sections wherever
practicable. The water pumped out from
trenches or foundation excavations should be discharged into storm drains via
silt removal facilities; § Manholes
(including newly constructed ones) should always be adequately covered and
temporarily sealed so as to prevent silt, construction materials or debris
being washed into the drainage system and storm runoff being directed into
foul sewers; § Precautions to be
taken at any time of the year when rainstorms are likely, actions to be taken
when a rainstorm is imminent or forecasted and 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; § 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 sited wheel
washing facilities should be provided at the exit of every construction site
where practicable. 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-washing bay to public roads should be paved with
sufficient backfall toward the wheel-washing bay to prevent vehicle tracking
of soil and silty water to public roads and drains; § Oil interceptors
should be provided in the drainage system downstream of any oil/fuel
pollution sources. Oil interceptors
should be emptied and cleaned regularly to prevent the release of oil and
grease into the storm water drainage system after accidental spillage. A bypass should be provided for oil
interceptors to prevent flushing during heavy rain; § Stockpiled
material shall be covered by tarpaulin and /or watered as appropriate to
prevent windblown dust and surface run off. Measures should be taken to
prevent the washing away of construction materials, soil, silt or debris into
any drainage system; § Major stockpiled
areas shall be sited outside of the country parks area (Works Section 6) and
away from stream courses as far as practicable. For the stockpiling area SA4 within the
country park area, stockpiling of earthed material shall be minimised and
excavated soil from Works Section 6 shall be delivered to the Site Office as
soon as possible. Similarly, overnight stockpiling of earthed material along
the exposed trench shall be minimised as far as possible and the excavated
soil shall be transferred to the designated stockpiling area as soon as
possible; § The Contractor
shall comply with WSD’s General Conditions for Working within Water Gathering
Grounds as applicable; § The construction
solid waste, debris and rubbish on-site should be collected, handled and
disposed of properly to avoid causing any water quality impacts. The requirements for solid waste management
are detailed in Section 9 of this EIA report; and § All fuel tanks and
chemical and bentonite storage areas should be provided with locks and sited
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
nearby WSRs. |
To control water quality impact from construction
site runoff and general construction activities |
All works sites |
Contractor and Sub-contractors |
Water Pollution Control Ordinance |
|
ü |
|
|
5.8.8.4 |
4.11.2.4 |
There is a need to apply to the 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. It should
particularly noted that the TM-DSS specifically prohibits the discharge of
the following substances into the inland waters: § polychlorinated
biphenyls (PCB); § polyaromatic
hydrocarbon (PAH); § fumigant,
pesticide or toxicant ; § radioactive
substances ; § chlorinated
hydrocarbons; § flammable or toxic
solvents ; § petroleum oil or
tar; § calcium carbide; § wastes liable to
form scum, deposits or discoloration; § sludge or solid
refuse of any kind; and § detergents in Group A inland
waters only. |
To control water quality impact from effluent
discharge from construction site |
All works sites |
Contractor and Sub-contractors |
Water Pollution Control Ordinance |
|
ü |
|
|
5.8.8.5 |
4.11.2.5 |
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 and shall be encouraged. 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. |
To control water quality impact from effluent
discharge from construction site |
All works sites |
Contractor and Sub-contractors |
Water Pollution Control Ordinance |
|
ü |
|
|
5.8.8.6 |
4.11.2.6 |
In addition to compliance with the
discharge licence requirement, to prevent bank side erosion, the discharge of
site effluents shall be either at existing storm drains or artificial
channels. No effluent or treated surface runoff shall be allowed to discharge
at natural stream course. |
To control water quality impact from effluent
discharge from construction site |
All works sites |
Contractor and Sub-contractors |
Water Pollution Control Ordinance |
|
ü |
|
|
5.8.8.7 |
4.11.2.7 |
The use of bentonite slurries shall be
minimised as far as possible. In addition to the requirement of a peripheral
bunds and drainage system for the WA4 and SO, where the bentonite slurries
will be used, to prevent any accidental release of bentonite slurry from
getting into the surrounding environment, the following specific control
measures shall be followed to reduce the risk and impacts of accidental
spillage: § All bentonite
slurry should be stored in a container that resistant to corrosion, maintained
in good conditions and securely closed; § The container
should be labelled in English and Chinese and note that the container is for
storage of bentonite slurry only; § The storage
container should be placed on an area of impermeable flooring and bunded with
capacity to accommodate 110% of the volume of the container size or 20% by
volume stored in the area and enclosed with at least 3 sides; and § Sufficiently
covered to prevent rainfall entering the container or bunded area (water
collected within the bund must be tested and disposed of as chemical waste,
if necessary). |
To control water quality impact from bentonite
slurry |
All relevant works sites |
Contractor and Sub-contractors |
Water Pollution Control Ordinance |
|
ü |
|
|
5.8.8.8 |
4.11.2.8 |
In order to reduce the possibility of
frac-out, detailed ground investigation shall be undertaken to evaluate the
likelihood of frac-out and if necessary advanced ground treatment applied
before the commencement of the pipe jacking works. A member of the
Contractor’s site staff shall, also, be dedicated to closely monitor the
ground surface above the pipe jacking head for any frac-outs release. The
pipe jacking works and application of bentonite shall immediately stop if
frac-outs are observed. Any frac-out shall be immediately cleaned or bunded
to prevent spreading of the bentonite slurry. The Contractor shall
immediately notify the Engineer and propose rectification measures to prevent
further frac-out to the satisfaction of the Engineer before pipe jacking
works resume. An emergency clean up
kit shall be readily available at Works Section 2 and 6 where pipe jacking
will be undertaken. |
To control water quality impact from bentonite
slurry |
All relevant works sites |
Contractor and Sub-contractors |
Water Pollution Control Ordinance |
|
ü |
|
|
5.8.8.9 |
4.11.2.9 |
The handling and disposal of bentonite
slurries should be undertaken in accordance within ProPECC PN 1/94. Surplus bentonite slurries used in
construction works shall be reconditioned and reused wherever practicable. Residual bentonite slurry shall be disposed
of from the site as soon as possible as stipulated in Clause 8.56 of the
General Specification for Civil Engineering Works. The Contractor should
explore alternative disposal outlets for the residual bentonite slurry (dewatered
bentonite slurry to be disposed to a public filling area and liquid bentonite
slurry if mixed with inert fill material to be disposed to a public filling
area) and disposal at landfill should be the last resort. |
To control water quality impact from bentonite
slurry |
All relevant works sites |
Contractor and Sub-contractors |
Water Pollution Control Ordinance |
|
ü |
|
|
5.8.8.10 |
4.11.2.10 |
The 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 |
All works sites |
Contractor and Sub-contractors |
Water Pollution Control Ordinance, Waste Disposal
Ordinance |
|
ü |
|
|
5.8.8.11 |
4.11.2.11 |
Any maintenance facilities should be
located outside Works Section 6 in the |
To control water quality impact from accidental
chemical spillage |
All works sites |
Contractor and Sub-contractors |
Water Pollution Control Ordinance, Waste Disposal
Ordinance |
|
ü |
|
|
5.8.8.12 |
4.11.2.12 |
Disposal of chemical wastes should be
carried out in compliance with the Waste Disposal Ordinance. 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.
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; and § 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 |
All works sites |
Contractor and Sub-contractors |
Water Pollution Control Ordinance, Waste Disposal
Ordinance |
|
ü |
|
|
5.8.8.13 |
4.11.2.13 |
In order to minimise the risk of
accidental spillage, the use and storage of oils/chemicals/waste should be
limited to absolute minimum volume and are to be removed from sites at the
earliest opportunity. However, all
chemical waste, fuels and oils shall be stored at the Site Office (SO), to
minimise impact to the |
To
control water quality impact from accidental chemical spillage |
All works sites |
Contractor and Sub-contractors |
Water Pollution Control Ordinance, Waste Disposal
Ordinance |
|
ü |
|
|
5.8.8.14 |
4.11.2.14 |
In order to protect against an accidental
spillage of fuel or oil, the Contractor will be required to prepare a spill
response plan to the satisfaction of AFCD, EPD, FSD, HyD, Police, TD and WSD
to define procedures for the control, containment and clean-up of any
spillage that could occur on the construction site. |
To
control water quality impact from accidental chemical spillage |
All works sites |
Contractor and Sub-contractors |
Water Pollution Control Ordinance, Waste Disposal
Ordinance |
|
ü |
|
|
5.8.8.15 |
4.11.2.15 |
At all times, the Contractor shall comply
with WSD’s General Conditions for Working within Water Gathering Grounds as
applicable. |
To
control water quality impact from accidental chemical spillage |
All works sites |
Contractor and Sub-contractors |
Water Pollution Control Ordinance, Waste Disposal
Ordinance |
|
ü |
|
|
5.8.8.16 |
4.11.2.16 |
The sewage of the
site office will be connected the existing sewer networks and be treated at
the Ngong Ping STW. Portable chemical toilets and sewage holding tanks are
recommended for the handling of the construction sewage generated by the
workforce at other works area. The use
of temporary toilets within the water gathering ground, however, is also
subject to the approval of Water Services Department. A licensed contractor
should be employed to provide appropriate and adequate portable toilets and
be responsible for appropriate disposal and maintenance |
To control water quality impact from sewage of workforce |
All works sites |
Contractor and Sub-contractors |
Water Pollution Control Ordinance |
|
ü |
|
|
5.8.8.17 |
4.11.2.17 |
The Outfall A and
Intake C and associated works areas are within the gabion channel, the
construction and operation of which was previously governed by the
Environmental Permit EP-192/2004.
While the EP was surrendered in May 2007, the currently proposed works
at these locations shall, also, comply with the specific conditions of the EP
(see Section 2.7 of this Report) as far as possible and in particular avoid
works in the rainy period between April and September so as to minimise
potential water quality pollution to the lowest possible. |
To control water quality impact under EP-192/2004 |
All relevant works sites |
Contractor and Sub-contractors |
EIAO, Water Pollution Control Ordinance |
|
ü |
|
|
5.9.2.1 |
4.11.3.1 |
All intakes and
outfalls of the proposed system shall have weir walls constructed to at least
500mm or equivalent to ensure the normal flow of existing watercourses is not
interrupted. Since Intake C is within
the gabion channel, the construction and operation (maintenance desilting
works, if any) of both will comply with the Specific Conditions EP-192/2004
unless otherwise approved by the DEP |
To control water quality impact from intake and
outfall |
All intakes and outfalls |
DSD |
EIAO, Water Pollution Control Ordinance |
|
|
ü |
|
5.9.2.3 |
4.11.3.2 |
In order to avoid wastewater being discharged in the
existing watercourses during maintenance works, desilting by hydraulic
jetting shall be avoided and mechanical scooping / scraping methods are
recommended. Desilting or maintenance
works shall also be undertaken during the dry season when flow in the
watercourse is low. The disposal of
the removed silt material shall be properly handled in accordance with the
recommendations in Section 9 of the EIA Report. |
To control water quality impact from wastewater
discharge |
All intakes and outfalls |
DSD |
EIAO, Water Pollution Control Ordinance |
|
|
ü |
|
Ecology |
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|
6.12.1.3 |
5.5.2.19
& Table 5.2 |
Good construction practice
measures which should be implemented and should include: § avoid damage and
disturbance to the remaining and surrounding natural habitat; § placement of
equipment in designated areas within the existing disturbed land; § spoil heaps should
be covered at all times; § construction
activities should be restricted to the proposed works boundary; and §
disturbed areas to be
reinstated immediately after completion of the works. |
To minmise the impact to the habitat |
All the works sites |
Main Contractor |
EIAO |
|
ü |
|
|
6.12.2.3 & Table 6.28 |
5.3.2.2 |
Landscape compensatory
planting is recommended as mitigation for the loss of landscape and
habitat. Recommended Planting Species
included: Tree Cinnamomum burmannii Elaeocarpus sylvestris Ficus microcarpa Pongamia pinnata Schefflera heptaphylla Sapium discolor |
To compensate the loss of landscape and habitat from
the project |
Compensatory location in Figure 7.9 of the EIA |
Main Contractor |
EIAO |
|
ü |
|
|
6.12.2.8, 6.12.2.9 & 6.12.2.10 |
5.5.2.4,
5.5.2.5, 5.5.2.6, 5.5.2.7 & Table 5.2 |
“Updated Baseline
Vegetation Survey” shall be conducted by a qualified ecologist and land
surveyor of the ET prior to the site clearance works. The ET ecologist, in
association with the Contractor, shall review if these species can be
preserved in-situ or have to be
transplanted. Wherever possible,
priority shall be given to in-situ preservation over off-site
transplantation. The ET ecologist(s) shall
seek the Engineer, IEC, EPD and AFCD approval on the “Updated Baseline
Vegetation Survey” which shall be undertaken in the pre-construction phase and
the report be submitted at least
two months before the works commence. |
To reconfirm the status of the floral species of
conservation interest present in the Project Area within Works Section 6 as there will be a time lapse until the start of the
construction contract and given the dynamic nature of the natural
environment. To
allow a more focused plan of transplantation or protection to be formed. |
Works Section 6 |
Main Contractor |
EIAO |
ü |
|
|
|
6.12.2.11, 6.12.2.12, 6.12.2.13, 6.12.3.2 &
6.12.3.3 |
5.5.2.8,
5.5.2.9, 5.5.2.10, 5.5.2.11 & Table 5.2 |
Based upon the findings of
the “Updated Baseline Vegetation Survey”, a “Floral Protection Plan” for each
species in the pre-construction phase shall be prepared for submission at least one month in advance of the
works commencing to specifically define the protection measures required in
each case. The possible measures for
in-situ preservation include: § Restricting access
to the floral species of conservation interest by mean of fencing, railing or
temporary barriers. Enclosing or
bunding of the species shall be considered as the last resort; § Restricting the
works activities to within designated works area by mean of fencing, railing
or temporary barrier; and §
Controlling site-runoff if the species are located
downstream of works area. It is recommended that
solid fencing be erected at the access entrance to the flora species to be
protected before the commencement of works to prevent vehicle movements and
encroachment of personnel into adjacent areas where these species are
located. All the proposed in-situ preservation measures shall be
audited by the ET at least monthly to ensure that the approved “Floral
Protection Plan” is properly implemented and that damage does not occur to
the flora being protected and, also, the surrounding environment.
Environmental briefing/training sessions should be provided and scheduled for
site staff to raise their awareness on environmental protection. The ET ecologist(s) shall
seek the Engineer, IEC, EPD and AFCD approval on the “Floral Protection Plan”
prior to implementing the recommendations |
To specifically define the protection measures
required for the flora species within Section 6. |
Works Section 6 |
Main Contractor |
EIAO |
ü |
|
|
|
6.12.2.14, 6.12.2.15 & 6.12.2.16 |
5.5.2.12,
5.5.2.13, 5.5.2.14 &Table 5.2 |
Based upon the findings of
the “Updated Baseline Vegetation Survey”, for those species that cannot be
preserved in-situ, each shall be
transplanted. The ET shall submit a detailed “Floral Transplantation Plan”
for each species in the pre-construction phase for submission at least two months in advance of the works commencing,
which shall include details such as the species and number to be
transplanted, the programme and reception site. If the affected individual is
deem not suitable for transplantation due to factors such poor health or
anticipated low post-transplantation survival rate, compensatory planting may
be considered as an alternative. The ET ecologist(s) shall
seek the Engineer, IEC, EPD and AFCD approval of the “Floral Transplantation
Plan”, including the receptor site(s), before implementing the
recommendations of the plan. The transplantation works will be undertaken in
the pre-construction phase and at least 1 week before works commence. Following the
transplantation, in order to ensure the transplantation is providing an effective
mitigation measure, post-transplantation monitoring would be required. The
post-transplantation monitoring shall be conducted monthly for the first 12
months and then quarterly for a further 12 months. Given the works contract is approximately
30 months, all the post-transplantation monitoring would be undertaken within
the construction phase. Should the
survival rate of the transplanted individual be found to be unacceptably low,
then the Environmental Team shall propose alternative compensation methods,
such as seed collection or planting of new individuals of the same species
after the works area has been reinstated. If required, a
“Compensatory Planting Plan” shall be prepared by the ET and submitted to the
Engineer, the Independent Environmental Checker (IEC), Environmental
Protection Department and Agriculture, Fisheries and Conservation
Department’s for approval before implementing the recommendations of the
plan. The “Compensatory Planting Plan”
shall include details of the implementation
programme and methodology for any proposed compensatory planting for species
of conservation interest. |
To specifically define the measures required for the
floral to be transplanted. |
Works Section 6 |
Main Contractor |
EIAO |
ü |
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6.12.3.5, 6.12.3.6, 6.12.3.7 & 6.12.3.8 |
5.5.2.15,
5.5.2.16, 5.5.2.17, 5.5.2.18 &
Table 5.2 |
An “Aquatic Fauna
Translocation Plan” should be prepared for project. A qualified ecologist as part of the ET
shall prepare and submit an “Aquatic Fauna Translocation Plan” in the
pre-construction phase at
least two months in advance of the works commencing, which shall include
details such as the species, potential numbers, methodology for survey and
translocation for each species, the programme and reception sites. The ET shall seek approval of the “Aquatic
Fauna Translocation Plan” by the Engineer, IEC, AFCD and EPD. Based upon the approval of
the “Aquatic Fauna Translocation Plan”, and “Aquatic Fauna Translocation
Survey” will be conducted at the affected sections of the stream courses, at
Works Sections 1 and 6, prior to site clearance works. The survey shall be conducted by a
qualified ecologist as part of the ET and cover the stretch of the stream
course 5m upstream and downstream of the works and identify potential
receptor sites. Any aquatic fauna species of conservation found shall be
collected and translocated to the approved translocation receptor site on the
same survey date. Since the species are mostly nocturnal, the translocation
survey shall be conducted at night-time.
However, the translocation works shall be undertaken no more than a
week before the relevant site works. An “Aquatic Fauna
Translocation Survey” report shall be prepared by a qualified ecologist of
the ET and submitted within 2 weeks of the translocation works for approved
by the Engineer, IEC, AFCD and EPD. |
To define the measure and translocation plan for the
affected aquatic fauna in the connected stream and tributaries at Work
Sections 1 and 6. |
Works Sections 1 and 6. |
Main Contractor |
EIAO |
ü |
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6.12.4.3 |
5.3.3.1 |
Minimisation mitigation
measures required to protect water quality and the three aquatic faunal
species of conservation would comprise controlling surface run-off: § All works on the
banks of the natural stream should be undertaken within the dry season, where
practical; § Perimeter cut-off
drains to direct off-site water around the site should be constructed with
internal drainage works and erosion and sedimentation control facilities
implemented; § Channels (both
temporary and permanent drainage pipes and culverts), earth bunds or sand bag
barriers should be provided to divert the stormwater to silt removal
facilities; § Oil interceptors
should be provided in the drainage system downstream of any oil/fuel
pollution sources; § Stockpiled material
shall be covered by tarpaulin and /or watered as appropriate to prevent
windblown dust and surface run off; § Overnight
stockpiling of earthed material along the exposed trench shall be minimised
as far as possible and excavated soil shall be transferred to the designated
stockpiling area as soon as possible; § All bentonite
slurry shall be suitably stored in accordance with Section 5.8.8 of this EIA
Report to minimise the chance of spillage; § All fuel tanks and
storage areas should be provided with locks and sited on sealed areas, within
bunds of a capacity equal to 110% of the storage capacity of the largest tank
to prevent spilled fuel oils; and § Pipe jacking areas
shall be closely monitored for frac-outs release of bentonite and frac-out
area immediately cleaned if they occur. |
To control the surface run-off from the site to the
stream courses |
All works area |
Main Contractor |
ProPECC PN 1/94 |
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6.12.4.4 |
5.3.3.2 |
The particular measures to
protect the ecology of the § Major stockpiled
areas shall be sited outside of the country parks area (Works Section 6) and
away from stream courses as far as practicable; § All backfilling
material and cement required for this Works Section 6 shall be delivered
daily and only the quantity required; § No storage of
chemicals and waste in Works Section 6; and §
No construction plant maintenance facilities in Works
Section 6. |
To protect the ecology of the |
Works area within the |
Main Contractor |
EIAO |
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ü |
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6.12.4.5 |
5.3.3.3 |
Treated site drainage
shall be discharged via the existing drainage system or diverted to the
artificial channel to prevent stream bank erosion and directly affect the
stream ecology. No site drainage shall
be allowed to be discharged at the natural stream bank. |
To prevent stream bank erosion and directly affect
the stream ecology |
All streams within the works area |
Main Contractor |
EIAO |
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ü |
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6.14.1.1 |
5.4.1.1 |
If desiliting works at the
intakes are found to be required, it is recommended as a precautionary
measure that works shall be conducted during the dry season to avoid any
secondary impacts due to temporary deterioration of water quality. |
To avoid any secondary impacts due to temporary
deterioration of water quality. |
All intakes |
DSD |
EIAO |
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ü |
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6.14.1.2 |
- |
Weir walls, of at least
500mm in height or equivalent approved by the Engineer, shall be included in
the drainage design at all intakes and outfalls to ensure the normal flow of
existing watercourse is not interrupted during the operational stage. |
To ensure the normal flow of existing watercourse is
not interrupted during the operational stage |
All intakes and outfalls |
DSD |
EIAO |
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ü |
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6.14.1.3 |
- |
The gabion channel at the
north Ngong Ping 360 Terminal was constructed and operated under the Tung
Chung Cable Car Project - Diversion of the |
To comply with the Specific Conditions EP-192/2004
unless otherwise approved by the DEP in writing |
Outfall A and Intake C which are within the gabion
channel |
DSD |
EIAO |
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ü |
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Landscape and
Visual |
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7.11.1.1 & 7.11.1.2 |
- |
Potential reduction to
environmental impacts, including landscape and visual impacts, as detailed in
Section 2.5 of the EIA Report, to both avoid impacts on highly sensitive
landscape resources, particularly in the Lantau North Country Park and to
locate, design and reduce the physical extent of the works as far as
possible, so as to minimise the degree of general physical and visual impact.
A major consideration in minimising impacts has been the selection of a pipe
jacking construction method, which significantly reduces the area and volume
of ground excavation required for below ground drainage systems. |
To minimize landscape impacts during the
construction phase |
All project areas |
DSD |
EIAO |
ü |
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7.11.1.3 & Table 7.17 |
6.2.1.2
& Table 6.1 |
To maximize protection of
existing resources including watercourses existing trees, ground vegetation
and the associated understory habitats a “No-intrusion Zone” will be
designated to various areas within and along the site boundary with rigid and
durable fencing for each individual no-intrusion zone. Regular checks will be
carried out to ensure that the work site boundaries are not exceeded,
hoarding is properly maintained and that no damage is being caused to these protected
areas. |
To maximize protection of existing resources
including watercourses existing trees |
No-intrusion Zone along the site boundary |
Main Contractor |
EIAO |
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ü |
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7.11.1.3 & Table 7.17 |
6.2.1.2
& Table 6.1 |
A temporary screen
hoarding shall be erected around the north side of the Site Office (SO) area
to screen activities from local receivers. It shall be designed and to be
compatible with the existing rural context, with visually unobtrusive design
and colours where appropriate. |
To screen activities from local receivers |
Around the north side of the Site Office (SO) area |
Main Contractor |
EIAO |
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ü |
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7.11.1.3 & Table 7.17 |
6.2.1.2
& Table 6.1 |
No night time work shall
be programmed avoiding light pollution to visual receivers. |
To control the night-time lighting to the visual
receivers |
All works area |
Main Contractor |
EIAO |
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ü |
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7.11.1.3 & Table 7.18 |
6.2.1.2
& Table 6.2 |
Suitable land pockets
within the project area will be used for the implementation of compensatory
mitigation to offset the net loss of key landscape resources and improve
visual amenity. A compensatory tree
planting proposal including locations of tree compensation will be submitted
separately to seek relevant government department’s approval, in accordance
with ETWB TCW No. 3/2006. |
To offset the net loss of key landscape resources
and improve visual amenity |
Compensatory tree planting locations |
DSD |
ETWB TCW No. 3/2006 |
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ü |
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7.11.1.3 & Table 7.18 |
6.2.1.2
& Table 6.2 |
Following installation of
underground culverts, pit excavation or utilization of land for works or
stockpiling,the ground shall be backfilled, leveled and soiled .as necessary for
reinstatement prior to hydroseeding |
To improve landscape and visual amenity |
Compensatory planting locations in Figure 7.9 |
DSD |
EIAO |
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ü |
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7.11.1.3 & Table 7.18 |
6.2.1.2
& Table 6.2 |
Where water courses have
been affected by the works new, naturalised streams paths shall be provided as
far as applicable, using excavated local rocks and stones, in order to create a pleasing visual impression
and potential enhanced ecological habitat. |
To improve landscape and visual amenity |
Water courses have been affected by the works |
DSD |
EIAO |
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ü |
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7.11.2.2 |
- |
Application and approval
for removal for all trees shall be obtained in accordance with ETWB TCW No.
3/2006. The actual numbers of trees to be retained felled and transplanted shall
be subject to this process prior the construction. |
To remove the tree to be affected due to the Project |
All works area |
DSD |
ETWB TC 3/2006 |
ü |
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7.11.2.3 & 7.11.2.4 |
- |
There are 155 trees
proposed to be felled under the works including dead trees or that with a
potential public safety concern.
On-site compensatory planting of about 89 new heavy standard trees
will be undertaken as well as hydroseeding.
The proposed compensatory planting plan was presented in Figure 7.9 of
this EIA which shall be determined and agreed separately with government
during the Tree Felling Application process under ETWB TC 3/2006. |
To compensate the tree loss due to the construction
of the project. |
All works area |
DSD |
ETWB TC 3/2006 |
ü |
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Cultural Heritage |
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8.6.5.2 |
7.2.1.1 |
Four built heritage resources have been identified
as being located in close proximity to the proposed works areas, namely,
NP-19, NP-20, NP-21 and NP-26, as detailed in Appendix G1 and shown in
Figures 8.12, 8.13 and 8.15 of the EIA Report. The structures may be damaged by contact
with machinery and equipment. The recommended mitigation measures for each
resource are as follows: § A buffer zone of a
minimum of 5 metres in size (or if due to site/engineering constraints, as
large as possible buffer zone should be provided) should be marked out for
NP-19, NP-20, NP-21 and NP-26 by temporary fencing and placed around the
structures 2 weeks prior to the construction works commencing. Three built heritage resources have been identified
as being in close proximity to an excavation area (NP-10, NP-11 and NP-19), a
condition survey must be carried out by a qualified building surveyor or
engineer one month in advance of works commencing near the buildings that may
be affected by ground borne vibration. The Condition Survey Report should
contain descriptions of the structure, identification of fragile elements, an
appraisal of the condition and working methods for any proposed monitoring
(including frequency of monitoring) and precautionary measures that are
recommended. The Contractor must implement the approved monitoring and
precautionary measures. § Vibration
monitoring should be undertaken for the duration of the construction works
based upon the recommendations of the approved Condition Survey Report, which
will also define the frequency of monitoring required. The maximum acceptable
level of vibration will be set at 15 mm/s.
Based upon the findings of the condition survey, this limit may be
revised for sensitive structures. The
location of monitoring points should be situated on the structure closest to
the construction works, unless the maximum level is set lower than the
standard 15 mm/s, in which case monitoring points should be located on each
affected structure. Installation of monitoring points must not damage the
historic building fabric. The location of monitoring points (and access to
the property for purposes of measurement) must be agreed with the property
owner prior to installation. |
Conservation of
built heritage resources |
All relevant built heritage resources |
Contractor and Sub-contractors |
EIAO |
ü |
ü |
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Waste Management |
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9.6.1.1 |
8.2.1.2 |
The requirements as stipulated in the ETWB TC(W) No.19/2005 Environmental Management on Construction
Sites and the other relevant guidelines should be included in the Particular
Specification for the Contractor as appropriate. The future Contractor should be requested to submit
a Waste Management Plan (WMP), which becomes part of the Environmental
Management Plan (EMP), prior to the commencement of construction work, in
accordance with the ETWB TC(W) No.19/2005 so as to
provide an overall framework of waste management and reduction. The WMP should include: § Waste management
policy; § Record of
generated waste; § Waste reduction target; § Waste reduction
programme; § Role and
responsibility of waste management team; § Benefit of waste
management; § Analysis of waste
materials; § Reuse, recycling
and disposal plans; § Transportation
process of waste products; and § Monitoring and
action plan. |
To keep trace of the generation, minimization, reuse
and disposal of C&D materials |
All works sites |
DSD, Contractor and Sub-contractors |
ETWB TC(W) No 19/2005 |
ü |
ü |
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9.6.1.1 |
8.2.1.2 |
A trip-ticket system should be established in
accordance with DevB TC(W) No. 6/2010 and Waste
Disposal (Charges for Disposal of Construction Waste) Regulation to monitor
the disposal of public fill and solid wastes at public filling facilities and
landfills, and to control fly-tipping.
A trip-ticket system would be included as one of the contractual
requirements for the Contractor to strictly implement. The Engineer would also regularly audit the
effectiveness of the system. A recording system for the amount of waste
generated, recycled and disposed (locations) should be established. The future Contractor should also provide
proper training to workers regarding the appropriate concepts of site
cleanliness and waste management procedures, e.g. waste reduction, reuse and
recycling all the time. The CEDD should be timely notified of the estimated
volumes of excavated materials to be generated and the Public Fill Committee
should be notified and agreement sort on the disposal of surplus inert
C&D materials. Wherever
practicable, C&D materials should be segregated from other wastes to
avoid contamination and to ensure acceptability at public filling areas or
reclamation sites. |
To monitor disposal of waste and control fly-tipping |
All works sites |
Contractor and Sub-contractors |
DevB TC(W) No. 6/2010 |
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ü |
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9.6.1.1 |
8.2.1.2 |
Recommendations for good site
practices: § The site and
surroundings shall be kept tidy and litter free; § No waste shall be
burnt on-site; § Make provisions in
contract documents to allow and promote the use of recycled aggregates where
appropriate; § The Contractor
will be prohibited to dispose of C&D materials within the proposed site
and at any sensitive locations including Lantau North Country Park, the
Lantau South Country Park, the Ngong Ping Site of Special Scientific
Interest, the Lantau Peak Special Area and Site of Special Scientific
Interest and the Conservation Area, etc.
The Contractor should propose the final disposal sites in the EMP and
WMP for approval before implementation; § Stockpiled
material shall be covered by tarpaulin and /or watered as appropriate to prevent
windblown dust and surface run off; § Major stockpiled
areas shall be sited outside of the country parks area (Works Section 6) and
away from stream courses as far as practicable. For the stockpiling area SA4 within the
country park area, stockpiling of earthed material shall be minimised and
excavated soil from Works Section 6 shall be delivered to the Site Office as
soon as possible. Similarly, overnight stockpiling of earthed material along
the exposed trench shall be minimised as far as possible and the excavated
soil shall be transferred to the designated stockpiling area as soon as
possible; § Excavated material
in trucks shall be covered by tarpaulins to reduce the potential for spillage
and dust generation; § Wheel washing
facilities shall be used by all trucks leaving the site to prevent transfer
of mud onto public roads; § Standard formwork
or pre-fabrication should be used as far as practicable so as to minimise the
C&D materials arising. The use of
more durable formwork or plastic facing for construction works should also be
considered. The use of wooden
hoardings should be avoided and metal hoarding should be used to facilitate
recycling. Purchasing of construction
materials should be carefully planned in order to avoid over-ordering and
wastage; § The Contractor
should recycle as many C&D materials as possible on-site. The public fill and C&D waste should be
segregated and stored in separate containers or skips to facilitate the reuse
or recycling of materials and proper disposal. Where practicable, the concrete and masonry
should be crushed and used as fill materials.
Steel reinforcement bar should be collected for use by scrap steel
mills. Different areas of the sites
should be considered for segregation and storage activities; and § Subject to
agreement with Water Service Department, adequate numbers of portable toilets
should be provided for on-site workers.
Portable toilets should be maintained in reasonable states, which will
not deter the workers from utilising them.
Night soil should be regularly collected by licensed collectors. |
To implement good site practice for handling,
sorting reuse and recycling of wastes |
All works sites |
Contractor and Sub-contractors |
Waste
Disposal Ordinance, Land (Miscellaneous Provisions) Ordinance, DevB TC(W) No.
6/2010 |
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ü |
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9.6.1.1 |
8.2.1.2 |
Recommendations for waste
reduction measures: § General refuse
arising on-site should be stored in enclosed bins or compaction units
separately from C&D and chemical wastes.
General refuse shall be removed from Works Section 6 within the
country park on the regular basis. Sufficient dustbins shall be provided for
storage of waste as required under the Public Cleansing and Prevention of
Nuisances By-laws. In addition,
general refuse shall be cleared regularly and shall be disposed of to the
nearest licensed landfill or refuse transfer station. Burning of refuse on construction sites is
prohibited; § All waste
containers shall be in a secure area on hardstanding;
§ Aluminium cans are
usually collected and recovered from the waste stream by individual
collectors if they are segregated and easily accessible. Separately labelled bins for their
deposition should be provided as far as practicable; § Office wastes can
be reduced by recycling of paper if such volume is sufficiently large to
warrant collection. Participation in a
local collection scheme by the Contractor should be advocated. Waste separation facilities for paper,
aluminium cans, plastic bottles, etc should be provided on-site; and § Training shall be
provided to workers about the concepts of site cleanliness and appropriate
waste management procedure, including waste reduction, reuse and recycling. |
To implement on-site sorting facilitating reuse and
recycling of materials as well as proper disposal of waste |
All works sites |
Main Contractor |
Waste
Disposal Ordinance, Land (Miscellaneous Provisions) Ordinance |
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ü |
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9.6.1.1 |
8.2.1.2 |
Chemical
waste producers should register with the EPD.
Chemical waste should be handled in accordance with the Code of
Practice on the Packaging, Handling and Storage of Chemical Wastes as
follows: § Suitable for the
substance to be held, resistant to corrosion, maintained in good conditions
and securely closed; § Having a capacity
of <450L unless the specifications have been approved by the EPD; § Displaying a label
in English and Chinese according to the instructions prescribed in Schedule 2
of the Regulations; § Clearly labelled
and used solely for the storage of chemical wastes; § Enclosed with at
least 3 sides; § Impermeable floor
and bund with capacity to accommodate 110% of the volume of the largest
container or 20% by volume of the chemical waste stored in the area,
whichever is greatest; § Adequate
ventilation; § Sufficiently
covered to prevent rainfall from entering (water collected within the bund must
be tested and disposed of as chemical waste, if necessary); § Incompatible
materials are adequately separated; § All chemical
waste, fuels and oils shall be stored at the Site Office area, to minimise
impacts to the § All maintenance
activities which may generate chemical waste shall be undertaken in Site
Office area, as far as possible; § The Contractor
shall comply with WSD’s General Conditions for Working within Water Gathering
Grounds as applicable; and § Waste oils,
chemicals or solvents shall not be disposed of to drain. |
To properly store the chemical waste within works
sites and works areas |
All works sites |
Main Contractor |
Code of Practice on the Packaging, Labelling and
Storage of Chemical Wastes |
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ü |
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9.6.2.1 |
8.2.1.3 |
As
the quantity of inert material and possibly vegetation removed from the
maintenance of the drainage system will be limited, adverse impacts would not
be expected during the operational phase of the project. However, some mitigation measures to reduce
the level of impacts are recommended as follows: § Non-inert
materials such as garbage and possibly vegetation will be disposed to WENT Landfill
via the OITF in Mui Wo; § Inert material,
such as excess sand and boulders, should be delivered from the project site to
the Tseung Kwan O Area 137 Fill Bank via the Public Fill Reception Facility
in Mui Wo or to WENT Landfill if the amount is negligible; and § No marine disposal
of dredged/excavated sediment would be involved in this project. |
To separate the inert and non-inert waste with
proper disposal |
All the works sites |
DSD |
Waste Disposal Ordinance |
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ü |
* D – Design; PC – Pre-construction; C –
Construction; O – Operation