4.1.1.1
This section presents an
assessment on the potential noise impacts arising from the construction and
operation of the Project. The noise
impact assessment is conducted in accordance with the requirements of Annex 5
and Annex 13 of the Technical Memorandum on Environmental Impact Assessment
Process (EIAO -TM) as well as the requirements set out under Clause 3.4.5 and
Appendix C of the EIA Study Brief (No. ESB-359/2023).
4.1.1.2
The potential concurrent projects as identified
in Section 2 have been considered in this EIA to address the cumulative
impacts.
4.2.1
General
4.2.1.1
Noise impact has been assessed
in accordance with the criteria and methodology given in the Technical
Memoranda (TM) under the Noise Control Ordinance (NCO) (Cap. 400), and the
EIAO-TM under the
Environmental Impact Assessment Ordinance (EIAO) (Cap. 499).
4.2.1.2
The NCO and EIAO provide the
statutory framework for noise control.
Assessment procedures and standards are set out in the following TMs:
·
Technical Memorandum on
Environmental Impact Assessment Process (EIAO-TM);
·
Technical Memorandum for the
Assessment of Noise from Places other than Domestic Premises, Public Places or
Construction Sites (IND-TM);
·
Technical Memorandum on Noise
from Construction Work in Designated Areas (DA-TM);
·
Technical Memorandum on Noise
from Construction Work other than Percussive Piling (GW-TM);
·
Technical Memorandum on Noise
from Percussive Piling (PP-TM);
·
EIAO Guidance Note No. 9/2023 –
Preparation of Construction Noise Impact Assessment under the EIAO (GN No.
9/2023);
·
EIAO Guidance Note No. 16/2023
– Preparation of Fixed Noise Sources Impact Assessment under the EIAO (GN No.
16/2023); and
·
EIAO Guidance Note No. 12/2023
– Preparation of Road Traffic Noise Impact Assessment under the EIAO (GN No.
12/2023).
4.2.2
Construction Noise
General
Construction Works
4.2.2.1
The NCO provides the statutory
framework for noise control of construction works, other than percussive
piling, using powered mechanical equipment (PME) between the hours of 1900 and
0700 hours or at any time on Sundays and general holidays (i.e. restricted
hours). Noise from construction
activities taking place at 0700 – 1900 hours on any day not being a Sunday or
general holiday is subject to the Noise Standards for Daytime Construction
Activities in Table 1B of Annex 5 of the EIAO-TM. The criteria are summarised in Table 4.1. For general construction work to be carried out
during non-restricted hours, guidelines on GN No. 9/2023 should be followed.
Table
4.1 Construction Noise Standards during
Non-restricted Hours
|
|
|
|
·
All Domestic premises,
·
Temporary housing
accommodation, Hostels,
·
Convalescent homes, and
· Homes for the aged.
|
75
|
|
·
Places of public worship,
·
Courts of law, and
·
Hospitals and medical
clinics
|
70
|
|
·
Educational Institutions (including
kindergartens and nurseries)
|
70
65 (during examination)
|
Construction
Works during Restricted Hours
4.2.2.2
On all days during 1900 and
0700 hours and at any time on Sundays and general holidays, the use of PME for
the purpose of carrying out construction work is prohibited unless a
Construction Noise Permit (CNP) has been obtained. A CNP may be granted provided that the
Acceptable Noise Level (ANL) for the Noise Sensitive Receivers (NSRs) can be
complied with. ANLs are assigned
depending upon the Area Sensitivity Rating (ASR) and are given in Table 4.2.
Table 4.2 Acceptable
Noise Levels under Technical Memorandum on Noise from Construction Work other
than Percussive Piling
|
|
|
|
|
|
|
|
All days during evening (1900 to 2300 hours), and general
holidays (including Sundays) during the daytime and evening (0700 to 2300
hours)
|
60
|
65
|
70
|
|
All days during the night-time
(2300 to 0700 hours)
|
45
|
50
|
55
|
4.2.2.3
The Noise Control Authority
will consider a well-justified CNP application, for construction works within
restricted hours as guided by the relevant TMs issued under the NCO. The Noise Control Authority will take into
account contemporary conditions/ situations of adjoining land uses and any
previous complaints against construction activities at the site before deciding
whether to grant a CNP. Nothing in the
EIA Report should bind the Noise Control Authority in making its decision. If a CNP is to be issued, the Noise Control
Authority should include in the permit any condition it considers
appropriate. Failure to comply with any
such conditions will lead to cancellation of the CNP and prosecution under the
NCO.
4.2.2.4
Under the DA-TM, the use of
five types of Specified Powered Mechanical Equipment (SPME) and three types of
Prescribed Construction Work (PCW) within a designated area during restricted
hours would require a valid CNP. The
SPME includes hand-held breaker, bulldozer, concrete lorry mixer, dump truck
and hand-held vibratory poker. The PCW are:
·
Erecting or dismantling of
formwork or scaffolding;
·
Loading, unloading or handling
of rubble, wooden boards, steel bars, wood or scaffolding material; and
·
Hammering.
4.2.2.5
In general, it should not be
presumed that a CNP would be granted for carrying out PCW within a designated
area during restricted hours. The CNP
may be granted for the execution of construction works during restricted hours
involving the use of PME and/or SPME if the relevant ANLs and criteria
stipulated in the GW-TM and DA-TM can be met.
The ANLs for the use of SPME within a designated area (i.e. those listed
in DA-TM) are more stringent (i.e. 15 dB(A) lower than those listed in the
GW-TM) to offer additional protection to the population.
Pilling
Works during Non-restricted Hours
4.2.2.6
Percussive piling is prohibited
between 1900 and 0700 hours on any weekday not being a general holiday and at
any time on Sundays or general holiday.
A CNP is required for carrying out percussive piling between 0700 and
1900 hours on any day not being a general holiday. PP-TM sets out the requirements for working
and determination of the permitted hours of operations for the CNP
applications. The permitted hours of
operations would be 3, 5 or 12 hours per day depending on the types of
percussive piling and the predicted noise impact at NSRs.
Construction
Ground-borne Noise during Non-restricted Hours
4.2.2.7
Noise arising from general
construction works of the Project during normal daytime (0700-1900 except
Sundays and general holidays) is governed by the EIAO-TM. With reference to the IND-TM under the NCO,
the criteria for noise transmitted primarily through the structural elements of
the building or buildings should be 10dB(A) less than the relevant ANL. These criteria apply to all NSRs, such as
residential buildings, schools, clinics, hospitals, temples and churches. Therefore, the ground-borne construction
noise criteria are limited to 10 dB(A) below respective ANL stipulated in the
GW-TM.
4.2.2.8
The construction ground-borne
noise criteria for the representative ground-borne NSR of the Project are
tabulated in Table
4.3 below.
Table 4.3 Noise Criteria for Construction
Ground-borne Noise
|
|
|
|
·
All Domestic premises,
·
Temporary housing
accommodation,
·
Hostels,
·
Convalescent homes, and
·
Homes for the aged
|
65
|
|
·
Places of public worship,
·
Courts of law, and
·
Hospitals and medical
clinics
|
60
|
|
·
Educational institutions
(including kindergartens and nurseries)
|
60
55 (during examination)
|
Construction
Ground-borne Noise during Restricted Hours
4.2.2.9
Similar to air-borne
construction noise during restricted hours, NCO also provides statutory control
of construction work for ground-borne noise during restricted hours. As
discussed in the above section, same principle for ground-borne noise criteria
(i.e. ANL-10dB(A) under the IND-TM) shall be adopted. Therefore, table below summarises the
ground-borne construction noise criteria during restricted hours.
Table
4.4
Construction Ground-borne Noise
Criteria during Restricted Hours
|
|
|
|
|
|
|
|
All days during evening
(1900 to 2300 hours), and general holidays (including Sundays) during the
daytime and evening (0700 to 2300 hours)
|
50
|
55
|
60
|
|
All days during the night-time
(2300 to 0700 hours)
|
35
|
40
|
45
|
Blasting
4.2.2.10
There is no statutory procedure
or criteria under the NCO and EIAO for assessing the blasting impacts and is
therefore beyond the scope of the EIA.
However, the administrative and procedural control of all blasting operations
in Hong Kong is vested in the Mines Division of the Civil Engineering and
Development Department (CEDD). The
Dangerous Goods Ordinance (Cap. 295) also stipulates that no person shall carry
out blasting unless he possesses a valid mine blasting certificate issued by
the Mines Division of CEDD. The
Superintendent of Mines will review the application on a case-by-case basis
before issuing the Mine Blasting Certificate.
Although there is no statutory noise level for blasting, the noise
associated with the removal of debris and rocks are controlled under the
EIAO-TM.
4.2.3
Road Traffic Noise
·
70 dB(A) at 1 m from the
external facades of all domestic premises, temporary housing accommodation,
hostels, convalescent homes, and homes for the aged;
·
65 dB(A) at 1 m from the
external facades of educational institutions, places of public worship, and
courts of law; and
·
55 dB(A) at 1 m from the
external facades of hospitals and medical clinics.
4.2.3.2
In addition, reference should
also be made to EIAO GN No. 12/2023.
4.2.4
Fixed Noise Sources
4.2.4.1
Fixed noise sources are
controlled by Section 13 of the NCO, IND-TM and GN 16/2023. For planned fixed noise sources, 5dB(A) below
the appropriate ANLs as shown in Table 2 of the IND-TM or the prevailing
background noise levels (for quiet areas with level 5 dB(A) below the ANL) as
recommended in the Annex 5 of EIAO-TM for planning purposes are applied to this
study. The ANLs and criteria for different ASRs are summarised in Table 4.5
below.
Table
4.5 Noise
Criteria for Fixed Noise Sources
|
Time
Period
|
Noise Criteria
for Different Area Sensitivity Rating
(Leq 30 min, dB(A)) (a), (b)
|
|
ANL, dB(A)
|
ANL-5, dB(A) for
Planned Fixed Noise Sources
|
|
ASR A
|
ASR B
|
ASR C
|
ASR A
|
ASR B
|
ASR C
|
|
Day
(0700 to 1900 hrs)
|
60
|
65
|
70
|
55
|
60
|
65
|
|
Evening
(1900 to 2300 hrs)
|
60
|
65
|
70
|
55
|
60
|
65
|
|
Night
(2300 to 0700 hrs)
|
50
|
55
|
60
|
45
|
50
|
55
|
Remarks:
4.2.5
Summary of Noise Standards for
Different Noise Sources
4.2.5.1
The noise standards for various
noise sources as mentioned above are summarised in Table
4.6 below.
Table
4.6 Summary of Noise Standards for Different
Noise Sources
|
|
|
|
|
|
|
|
|
|
|
|
·
All Domestic premises,
·
Temporary housing accommodation,
·
Hostels,
·
Convalescent homes, and
·
Homes for the aged
|
70
|
(a)
5
dB(A) below the appropriate ANL shown in the IND-TM, i.e.
Daytime
and evening time (0700 to 2300)
55 /
60 / 65 for ASR A / B / C respectively.
Night-time
(2300 to 0700)
45 /
50 / 55 for ASR A / B / C respectively.
or
(b)
the prevailing background noise levels (for quiet areas with level 5 dB(A)
below the ANL)
|
75
|
65
|
(a) All
evening (1900 to 2300 hours), and general holidays (including Sundays) during
the daytime and evening (0700 to 2300 hours),
ANL
on difference ASR is
60 /
65 / 70 for ASR A / B / C respectively.
(b) All night-time
(2300
to 0700 hours),
ANL
on difference ASR is
45 /
50 / 55 for ASR A / B / C respectively.
|
10
dB(A) below the appropriate ANL shown in the IND-TM,
(a)
All evening (1900 to 2300 hours), and general holidays (including Sundays)
during the daytime and evening (0700 to 2300 hours),
50 /
55 / 60 for ASR A / B / C respectively.
(b) All night-time
(2300
to 0700 hours),
35 /
40 / 45 for ASR A / B / C respectively.
|
|
·
Places of public worship, and
·
Courts of law
|
65
|
70
|
60
|
|
·
Hospitals and medical clinics
|
55
|
70
|
60
|
|
·
Educational institutions (including kindergartens
and nurseries)
|
65
|
70
65
(during examination)
|
60
55
(during examination)
|
4.3
Baseline Conditions
4.3.1
Description of the Noise
Environment
4.3.1.1
The proposed TYLL will be
constructed from Tsing Yi West to North Lantau across Man Wan Channel and Kap
Shui Mun covering three assessment areas in Tsing Yi West, Ma Wan South and
North Lantau.
Tsing Yi West
4.3.1.2
The land uses within the Study
Area of Tsing Yi are mainly for Industrial (I), Other Specified Uses (OU) and
Green Belt (GB) areas. No existing NSRs
are identified within 300m from the Project boundary. The prevailing noise climate of Tsing Yi West
comprises operational noise from industrial use and road traffic noise from
Tsing Sha Highway, Tsing Long Highway, Northwest Tsing Yi Interchange and
Lantau Link.
Ma Wan South
4.3.1.3
The land uses within the Study
Area of Ma Wan South are mainly for OU and GB.
No existing NSRs are identified within 300m from the Project
boundary. The prevailing noise climate
of Ma Wan South area is mainly associated with road traffic on Lantau Link, MTR
Tung Chung Line and Airport Express Line, and aircraft to and from Hong Kong
International Airport.
North Lantau
4.3.1.4
The land uses within the Study
Area of North Lantau are mainly for GB, OU and Undetermined (U). Village houses and temporary
houses/structures are identified in the surrounding area of the Project. Village houses are mainly located near Tso
Wan, while some temporary houses/structures are located near San Po Tsui and Yi
Chuen. The prevailing noise climate is
dominated by the road traffic noise from Lantau Link and aircraft noise.
4.3.2
Prevailing Noise Measurements
4.3.2.1
Since no fixed noise sources
are proposed under the Project at this stage, prevailing background noise
measurements at the existing NSRs are not considered required to determine the
standards for evaluating noise impact from fixed noise sources.
4.4.1.1
In accordance with Annex 13 of
the EIAO-TM, all domestic premises, temporary housing accommodation, hostels,
convalescent homes, homes for the aged, educational institutions (including
kindergartens and nurseries), places of public worship, courts of law,
hospitals, medical clinics and any other premises or places that are considered
by the Director of
Environmental Protection to have similar sensitivity to
noise as the above are NSRs.
4.4.1.2
According to the observations
from site visits and review of relevant land use plans including Outline Zoning
Plans (OZP), NSRs covering all existing, committed and planned noise sensitive
uses within 300m of the Project boundary have been reviewed. No committed NSRs
have been identified within the 300m assessment area.
4.4.1.3
As mentioned in Section 2,
there are two potential concurrent projects, namely the Ma Wan South
Development (MWSD) and the development at Hongkong United Dockyards (HUD
development), within the 300m noise assessment area. There is no concrete
implementation programme for MWSD and HUD development at the time of this EIA
study. In this regard, these developments would not be considered as planned
NSRs in this EIA Study.
4.4.1.4
The identified assessment area,
existing NSRs and potential planned NSRs are shown in Figure 4.2, while representative noise
assessment points (NAPs) are shown in Figure
4.3. Identified potential NSRs
and representative NAPs within 300m assessment area of the Project are listed
in Table 4.7
below. Photos of the representative NSRs
are presented in Appendix 4.1.
4.4.1.5
For road traffic noise impact
assessment, the first layer of NSRs would provide acoustic shielding to those
receivers at further distance behind.
The predicted noise levels at the first layer of NSRs represent the worst-case
scenario, and therefore representative NAPs at these NSRs are selected for road
traffic noise assessment.
Table
4.7 Identified Noise Sensitive Receivers and
Representative Noise Assessment Points within 300m from Project Boundary
|
NSR ID
|
NSR
Description
|
OZP
Land Use
|
Use of NSR [1]
|
No. of
Storeys/ max. mPD
|
Noise
Assessment Point ID (NAP ID)
|
Type of
Assessment [2]
|
Approximate Horizontal
Distance from Building Facade to Project Boundary, m
|
|
North Lantau
|
|
SPT [3]
|
10 Tai Chuen,
San Po Tsui
(Village
House)
|
Green Belt
|
R
|
1 storey
|
SPT1
|
C
|
90
|
|
YC
|
Yi Chuen
(Temporary
Structure)
|
Green Belt
|
R
|
1 storey
|
YC1
|
C, T
|
20
|
|
TW
|
Tso Wan
(Village
House and temporary structure)
|
Green Belt
|
R
|
2 storeys
|
TW1
|
C, T
|
225
|
|
|
1 storey
|
TW2
|
C, T
|
55
|
Notes:
* The assessment will
only include NSRs which rely on opened windows for ventilation and within 300m
assessment area.
[1] Use of NSR: R -
Residential
[2] Type of Assessment: C – Construction Noise Impact Assessment, T –
Road Traffic Noise Impact Assessment
[3] There was a
difficulty to verify whether this village house is a noise sensitive use during
the site survey. For a conservative
purpose, this village house is identified as a representative NSR.
NSRs at Tsing Yi West
4.4.1.6
For Tsing Yi side, no existing,
committed or planned NSRs within 300m assessment area have been identified.
NSRs at Ma Wan South
4.4.1.7
At Ma Wan, no existing, committed
or planned NSRs within 300m assessment area have been identified.
NSRs at North Lantau
4.4.1.8
There are some existing
potential NSRs in North Lantau but no committed and planned developments with
noise sensitive uses were identified within 300m assessment area. These existing NSRs are mainly village houses
or temporary structures scattering in San Po Tsui, Yi Chuen and Tso Wan.
4.5.1
Methodology
4.5.1.1
As set out in Appendix C Clause
2.1.2 of the EIA Study Brief (SB), a qualitative assessment is required to
identify the major noise sources / activities, and propose corresponding
quieter construction method and equipment adopted to demonstrate that no adverse
construction noise impact will be associated with the Project. A summary of key steps for this qualitative
construction noise assessment that has been conducted:
·
Determine 300m assessment area
from the Project boundary;
·
Identify existing, committed
and planned NSRs in the assessment area and select assessment points to
represent identified NSRs that may be affected by the works;
·
Summarise construction methods
for key construction works;
·
Collate the construction plant
inventory for the key construction works;
·
Evaluate the potential impact
on the NSRs qualitatively;
·
Examine and recommend all
practical mitigation measures, such as alternative construction methodology,
quiet plant, silencer, enclosure, etc., to alleviate any potential noise
impacts as much as practicable; and
·
Recommend noise mitigation
measures that follows Annex 13 of EIAO-TM and EIAO Guidance Note No. 9/2023 on
“Preparation of Construction Noise Impact Assessment under the Environmental
Impact Assessment Ordinance”.
4.5.2
Identification of Construction
Noise Impact
Identification of Assessment Area and NSR
4.5.2.1
According to Appendix C Clause
2.2.1(a) of the EIA SB, the assessment area of construction noise impact
assessment shall include areas within 300m from the boundary of the Project and
the works of the Project (see Figure 4.1).
4.5.2.2
NSRs and representative NAPs
that are affected by construction noise impact are identified and presented in Table 4.7
above and depicted in Figure 4.2
and Figure 4.3.
Tentative Construction Programme
4.5.2.3
Based on the tentative construction programme, most
of the construction of TYLL would be
completed before year 2033. A summary of key construction works for the
Project is shown in Table 4.8.
Table
4.8 Summary
of Key Construction Works for the Project
|
Description
|
Tentative Construction Programme
|
|
Tsing Yi Connection
|
Q1
2027 to Q2 2031
|
|
Suspension bridge over Ma Wan Fairway
|
Q1 2027 to Q2 2033
|
|
Viaduct connecting the two suspension bridges
|
Q1
2028 to Q4 2031
|
|
Suspension bridge over Kap Shui Mun Fairway
|
Q1 2027 to Q2 2030
|
|
North Lantau Interchange
|
Q1 2027 to Q2 2031
|
Inventory of Noise Sources
4.5.2.4
Section 2 of this EIA report has described the key project elements and the
associated construction methodology. The
potential sources of noise impact during the construction of the Project would
be the use of PME for various construction activities. The main construction works encompass the
following:
·
Site formation and construction of at-grade roads,
viaducts and road tunnel at North Lantau Interchange;
·
Construction of at-grade roads, viaducts and
retaining walls at Tsing Yi Connection;
·
Construction of the Main Bridges of TYLL, including
marine reclamations;
·
Modification/realignment of Tsing Sha Highway and
Cheung Tsing Highway;
·
Activities related to geotechnical engineering and
measures to mitigate natural terrain hazards; and
·
Additional works encompassing slope
works/formation, other tunnel operation areas, barging facilities, relocation
of existing facilities, landscaping activities, utility installations, etc.
4.5.2.5
The
construction programme currently envisioned does not require the use of
percussive piling. In accordance with
the list of good practices and state-of-the-art technologies within the
industry, the construction methods and equipment below can be employed in this
Project:
·
Quieter type blade saws and hydraulic crushers for
the purpose of concrete removal during site clearance and road realignment
operations;
·
Non-explosive chemical expansion agents and
hydraulic splitters for concrete or rock breaking activities;
·
Self-compacting concrete for the purpose of
concreting work instead of vibratory poker;
·
Silent piling by press-in method to minimise the
impact of existing structures in the construction of North Lantau Interchange
and Tsing Yi Connection; and
·
Off-site concreting works for viaduct construction
with pre-cast segments.
4.5.2.6
According to the construction
methodology envisaged at this stage, the construction activities and their
associated tentative PMEs have been outlined in Table
4.9 below. The plant inventory adopted for the
assessment have been confirmed by Project Engineer and HyD (Highways
Department). It should be noted that the Contractor will
review and update this tentative construction plant inventory in the upcoming
Construction Noise Management Plan (CNMP) based on the available engineering
data and considerations at that time.
Table 4.9 Tentative Plant Inventory for Key
Construction Activities
|
Activities
|
Possible PMEs Required
|
|
Site clearance and formation
|
·
Air compressor
·
Backhoe
·
Breaker
·
Compactor
·
Crane
·
Drill rig
·
Dump truck
·
Excavator
·
Hydraulic splitter
|
·
Generator
·
Grout mixer
·
Grout pump
·
Hydraulic crusher
·
Lorry
·
Saw
·
Water pump
·
Vibratory poker
·
Concrete pump
|
|
Reclamation & Seawall Construction Works
|
·
Air compressor
·
Bulldozer
·
Conveyor belt
·
Grab dredge
·
Crane barge
·
Derrick barge
·
Dump truck
·
Jack-up barge
·
Anchor boat
·
Flat top barge
·
Backhoes
|
·
Excavator
·
Generator
·
Tugboat
·
Vibratory compactor
·
Water pump
·
DCM barge
·
Cement barge
·
Drilling rig
·
Guard boat
·
Hopper barge
|
|
Construction of the Main Bridge of TYLL
|
·
Air compressor
·
Bar bender and cutter
·
Breaker
·
Cable hoist
·
Concrete lorry mixer
·
Concrete mixer
·
Concrete pump
·
Derrick barge
·
Piling machine
·
Elevator
·
Excavator
|
·
Generator
·
Hydraulic Slip Form Machine
·
Lorry
·
Mobile crane
·
Saw
·
Strand spinning machine
·
Tower crane
·
Tugboat
·
Vibratory poker
·
Water pump
·
Winch
|
|
Construction of tunnel sections at North Lantau Interchange
|
·
Batching plant
·
Breaker
·
Concrete lorry mixer
·
Concrete mixer
·
Concrete pump
·
Conveyor belt
·
Drill
·
Dumper
·
Dump truck
|
·
Excavator
·
Generator
·
Grader
·
Grinder
·
Lorry
·
Mobile crane
·
Rock drill
·
Ventilation fan
·
Concrete pump
|
|
Construction of portal structures at
North Lantau Interchange
|
·
Air compressor
·
Bar bender and cutter
·
Concrete lorry mixer
·
Concrete pump
·
Dump truck
·
Excavator
|
·
Generator
·
Lorry
·
Mobile Crane
·
Vibratory poker
·
Water pump
·
Hydraulic splitter
·
Concrete pump
|
|
Road works (including road widening, signage, pavement and drainage
works)
|
·
Air compressor
·
Asphalt paver
·
Bar bender and cutter
·
Compactor
·
Concrete lorry mixer
·
Concrete pump
·
Dump truck
·
Excavator
·
Generator
|
·
Launching girder
·
Lorry
·
Mobile crane
·
Paint liner marker
·
Roller
·
Trailers
·
Vibratory poker
·
Water pump
|
|
Construction of barging facility
|
·
Conveyor belt
·
Derrick barge
·
Dump truck
·
Vibratory poker
|
·
Excavator
·
Mobile crane
·
Tugboat
·
Bar bender and cutter
|
|
Setting-up of concrete batching plant
|
·
Air compressor
·
Breaker
·
Concrete lorry mixer
·
Concrete pump
·
Dump truck
|
·
Excavator
·
Generator
·
Mobile crane
·
Vibratory poker
·
Water pump
|
|
Construction of anchorages for the Main Bridges of TYLL
|
·
Concrete truck Concrete pump
·
Excavator
·
Dump truck
|
·
Mobile crane
·
Tower Crane
·
Water pump
·
Vibratory poker
|
|
Slope works
|
·
Breaker
·
Concrete lorry mixer
·
Compactor
·
Drill
·
Drill rig
·
Dump truck
·
Excavator
·
Generator
|
·
Grout mixer
·
Grout pump
·
Hydraulic crusher
·
Lorry
·
Saw
·
Vibratory poker
·
Water pump
|
|
Geotechnical works
|
·
Drilling rig
·
Generator
·
Concrete pump
|
·
Water pump
·
Vibratory poker
·
Bar bender and cutter
|
|
Landscape works
|
·
Breaker
·
Dump truck
·
Excavator
·
Generator
|
·
Lorry
·
Mobile crane
·
Saw
|
4.5.2.7
Apart from
the listed PMEs above, the construction of the tunnel would involve
drill-and-blast operations during restricted hours. The Contractor shall obtain the CNPs before commencing any restricted-hour
construction activities to ensure compliance and effective noise management.
4.5.3
Evaluation of Construction
Noise Impact
Tsing Yi
West
4.5.3.1 There are
no identified existing, committed and planned NSRs at Tsing Yi area within 300m
noise assessment area. Therefore, no construction noise impact at Tsing Yi West
is anticipated.
Ma Wan South
4.5.3.2 There are
no identified existing,
committed or planned NSRs at Ma Wan South within 300m noise assessment area.
Therefore, no construction noise impact at Ma Wan South is anticipated.
North
Lantau
4.5.3.3
There are no committed and planned
NSRs within 300m noise assessment area in North Lantau. Only some scattered
village houses / temporary structures located in San Po Tsui, Yi Chuen and Tso
Wan are classified as potential NSRs as shown in Figure 4.2 and summarised in Table 4.7.
4.5.3.4
For the work sites near San Po
Tsui, key construction activities include movement of construction vehicles,
construction of barging facilities, construction / operation / demolition of
temporary concrete batching plant, etc.
The distance from building facades of the nearest village houses to the
works boundary is about 90m. Considered that the houses at San Po Tsui are only
1-storey, with proper implementation of appropriate mitigation measures and
good site practices (e.g. use of quality powered mechanical equipment (QPME) / quieter construction methods, use of site hoarding with
higher surface density and height, noise barriers, noise enclosures and
locating mobile plant as far away as possible and practicable from NSRs, etc.),
no adverse construction noise impact on the NSRs at San Po Tsui is anticipated.
4.5.3.5
There are only three 1-storey
temporary structures at Yi Chuen which are likely to be residential use and
located at about 20m from Project boundary.
They are located at about 70m from the nearest works area of the Lantau
Anchorage and about 265m from the works area of the barging facilities. Major construction activities include slope
works, site formation, construction of columns and decks for viaduct sections,
etc. Those construction activities would
be partly screened by natural terrain. With proper implementation of
appropriate mitigation measures and good site practices (e.g. use of QPME /
quieter construction methods, use of site-hoarding with higher surface density
and height, noise barriers, noise enclosures and locating mobile plant as far
away as possible and practicable from NSRs, etc.), no adverse construction
noise impact on the NSRs at Yi Chuen is anticipated.
4.5.3.6
Lots of temporary
structures/houses are located at Tso Wan near the coast and upslope. The nearest horizontal distance from building
façade to Project boundary is about 55m.
Major construction activities include slope works, site formation,
construction of portal structures and tunnel sections, and construction of slip
roads connecting to the HKIW-NEL Link. As
shown in Figure 4.3.2, TW2 is the closest NAP
that might be affected during construction phase and operational phase. TW2 is located at about 210m from the tunnel
portal of southbound slip road and about 260m from the tunnel portal of northbound
slip road. Considering that TW2 is
screened by natural terrain and located at a certain distance from the
construction works areas, no adverse construction noise impact on the NSRs at
Tso Wan is anticipated with proper implementation of appropriate mitigation
measures and good site practices (e.g.
use of QPME / quieter construction methods, use of site hoarding with
higher surface density and height, noise barriers, noise enclosures and
locating mobile plant as far away as possible and practicable from NSRs, etc.).
4.5.3.7
Temporary access haul roads at North Lantau for construction
vehicles/trucks would be provided during construction phase. However, the haul
road alignment cannot be confirmed at this stage as they are subject to the
actual site condition and contractor design to facilitate material
transportation. In order to minimise the
impacts on existing roads, the Contractor shall i) implement measures to avoid
construction traffic during peak hours where practicable, ii) limit the number
of construction vehicles during construction phase, and iii) coordinate
carefully with concurrent projects to reduce overlapping travel routes and
minimise overall induced traffic.
Drill-and-Blast
Works at North Lantau
4.5.3.8
While methods such as tunnel
boring machine (TBM) for tunnelling works were considered, as medium to hard
rocks would be expected in the North Lantau vicinity, the ground conditions
would hinder the usage of TBM which is more likely to be employed for softer
ground profile. Furthermore, due to the
short length of the tunnel, the adoption of TBM is not cost-effective. Therefore, blasting was proposed for the
purpose of tunnel works.
4.5.3.9
The initial sections of the
tunnel will be excavated by mechanical methods.
Drill-and-blast excavation will then be adopted for the construction of
remaining tunnel sections starting from approximately 50m beyond the
portal. The drill-and-blast works would
possibly be conducted throughout a 24-hour cycle on a daily basis as the
worst-case scenario subject to the granting of CNP. For safety reason, a metal blast door would
be installed at the portal and this blast door would be closed during the
blasting works. According to the latest construction methodology, blasting
would be conducted daily at each workfront which will be subject to the
agreement from the Mines Division of CEDD. Blasting should be carried out
outside sensitive hours as far as practicable.
As described in Section 4.2.2.10,
the noise generated during the blast does not fall under the NCO and EIAO. Considering that the blasting works will be
carried out inside the metal blast door and will only last for few seconds per
blast and be infrequent, therefore it will not cause adverse air-borne nor
ground-borne construction noise impacts to NSRs in the vicinity.
4.5.3.10
Besides, the Contractor will be required to post highly visible warning
notices/signs at suitable locations to warn the public that blasting will take
place. These warning signs will be posted near the intended blasting location,
even though all blasts will be conducted underground. The Contractor is
required to state the blasting date and time on the notice.
Surface Blasting at North Lantau
4.5.3.11
Having reviewed the site
formation methods, to address the potential geological constraints and time
implication arising from the use of other methods (e.g. expansion agents), it
is considered that blasting would be the most feasible method for site formation
in this Project.
4.5.3.12
Surface blasting works would
also be required at several rock cut slope sites along the alignment where
large portions of rock will be excavated.
Surface blasting would be conducted daily at each workfront which will
be subject to the agreement from the Mines Division of CEDD. Blasting should be carried out during daytime
only. Similar to the underground blasting, the surface blasting works will only
last for very short duration and be infrequent, it will not cause adverse
air-borne nor ground-borne noise impacts to NSRs in the vicinity.
4.5.3.13
Besides, the Contractor will be required to post highly visible warning
notices/signs at suitable locations to warn the public that blasting will take
place. These warning signs will be posted near the intended blasting location.
The Contractor is required to state the blasting date and time on the notice.
Consideration
of Cumulative Impacts
4.5.3.14
Section 2 has identified a list of concurrent projects that would be
considered in this EIA to address the cumulative impacts.
4.5.3.15
The works areas of proposed
Route 11 would be outside 300m from the identified NSRs at Lantau, no
cumulative impacts would be anticipated.
4.5.3.16
There are two slip roads that
would be connected to the main alignment of Hong Kong Island West - Northeast
Lantau Link (HKIW-NEL Link) at North Lantau.
It is anticipated that the EIA for HKIW-NEL Link would consider all
committed projects in the vicinity, including but not limited to TYLL during
its subsequent study. Like any other
studies by government, it is anticipated that they will also implement all the
best practices to abate construction noise impacts where practicable. On this basis, adverse cumulative
construction noise impacts from these projects are therefore not anticipated.
4.5.3.17
For the concurrent projects of “Road P1 (Tai Ho - Sunny Bay Section)”,
“Sunny Bay Development” and “Underground quarrying contract at Tsing Yi North”,
since no existing noise sensitive receivers are located within 300m from these
concurrent projects, no cumulative noise impact assessment of these concurrent
projects are considered necessary. For
the concurrent projects of MWSD and HUD development, considering that no
concrete implementation programme nor approved rezoning proposal / planning
application and associated design plan of MWSD and HUD development are
available at the present stage, the cumulative impacts on these projects will
be assessed in separate studies conducted by their respective project
proponents.
4.5.3.18
The Project Proponent will
further review the cumulative noise impact caused by the Project and concurrent
projects (if any) within 300m assessment area in the subsequent CNMP submission
at later construction phase to ensure that there is no adverse construction
noise impact.
4.5.4
Mitigation of Construction
Noise Impact
4.5.4.1 Due to
the tight
construction programme and limited buffer distances, construction noise
exceedances are anticipated at some NSRs.
The following mitigation measures have been considered and confirmed to
be practical by the Project Engineers:
·
Good site practices to limit noise emissions at the
source;
·
Use of QPME and quieter construction methods;
·
Use of temporary noise barriers, movable noise
barrier, noise enclosure, noise insulating fabric, silencer, etc., to screen
noise from construction equipment;
·
Install acoustic tunnel door or enclosure at tunnel
portals for construction activities to be carried out inside tunnel during
restricted hours;
·
Alternative use of plant items within one worksite,
wherever practicable; and
·
Providing sufficient separation distance between
NSRs and items of PME.
4.5.4.2
Quieter construction method such as silent
piling by press-in method is adopted as an alternative to traditional sheet
piling. A sheet pile is clipped and
pressed under the ground. Noise can be minimised by hydraulic press-in sheet
piles with drilling simultaneously for piling works at harder ground. The noise impact can also be further reduced
as the piling works can be completed within the shorter duration by using this
method.
4.5.4.3
The Contractor may be able to obtain
particular models of plant that are quieter than the PMEs given in GW-TM. The use of quality PME associated with the
construction works is prescribed in EPD’s QPME database, which contains the
SWLs for quality/quiet PME of various types, brands and models.
4.5.4.4
The use of hydraulic breaker for rock or
concrete breaking would inevitably generate high level of noise as the
operation principle of hydraulic breaker is through percussive striking actions
of its chisels. Quieter rock or concrete
breaking equipment (e.g. hydraulic crusher/splitter or hand-held breaker with
QPME label) in some activities should be considered in the CNMPs as a
mitigation measure, such as breaking large boulder into smaller pieces on site
for removal during site formation works, breaking seawall, breaking concrete
plinth/shallow foundation during demolition of temporary building structures,
and in seawall works for breaking existing large rock fill to finer rock fill
for reuse. This quieter rock breaking
equipment would create less noise impact to NSRs. The Contractor should, subject to the actual
site conditions, proactively adopt quieter rock breaking equipment, hydraulic
crusher/splitter or non-mechanical breaking method (e.g. use of chemical
expansion agent) to carry out the demolition works, where practicable. The Contractor should select appropriate
quieter construction method / equipment as appropriate to minimise any
potential construction noise impact to the environment. The Contractor should
explore other quieter construction method and equipment to further minimise the
potential construction noise impact.
4.5.4.5
Movable noise barriers or noise enclosures
would be erected to provide screening from the construction plant. Noise barriers would be most effective when
located immediately adjacent to the PME and can reduce the noise level by 5
dB(A) for movable PME and by 10 dB(A) for stationary PME. The Contractors shall be responsible for
design of the noise barrier with due consideration given to the size of the PME
and the requirement of intercepting the line of sight between the NSRs and
PME. The barrier material of movable
noise barrier should have at least 10 kg/m2 surface density. Purpose-built acoustics barrier can be used
to screen noise from particular items of PME or noisy construction
activities. The direct line of sight
between the PME and the NSRs should be totally screened by a substantial
barrier such that the PME will not be visible when viewed from any window, door
or other opening in any facade of the NSR.
A noise reduction of 10 dB(A) is assumed for purpose-built noise
barrier. Full enclosures can be
considered as an alternative to shelter relatively static plant including
generator. The provision of full enclosure is expected to provide 15 dB(A)
noise reduction for static PME.
4.5.4.6
Careful scheduling of construction activities and
grouping of PMEs within a construction site and liaison between contractors of
nearby construction sites could avoid multiple noisy construction
activities/construction equipment to be conducted/used at the same time within
close proximity. Hence, the cumulative
construction noise level could be reduced.
4.5.4.7
The benefits of these techniques can vary
according to specific site conditions and operations. The environmental noise
climate would certainly be improved with these control practices, although the
improvement can only be quantified during implementation when specific site
parameters are known.
4.5.4.8
For village houses / temporary structure with
residential use at North Lantau which are close to the construction sites, it
is recommended to install site hoarding with higher surface density and height
to provide extra noise attenuation to protect these NSRs.
4.5.5
Construction Noise Management
Plan
4.5.5.1 According
to Appendix C Clause 2.4 of the EIA SB, a CNMP shall be prepared and submitted
to the Director. The CNMP shall contain the quantitative construction noise
impact assessment, the adopted quieter construction method and equipment, noise
mitigation measures and the construction noise impact monitoring and audit
programme, with reference to the updated and identified noise mitigation
measures once available and in any case before the tender invitation if there
is any change to the construction noise mitigation measures in the EIA report
and before the commencement of construction of the project. Any technical constraint that would hinder
the use of these quieter construction method and equipment shall be evaluated
and clearly recorded in the assessment.
4.5.5.2 The CNMP
shall include an implementation schedule clearly listing out the mitigation
measures, the implementation party, locations and timing of
implementation. Mitigation measures
recommended and requirements specified in the CNMP will be fully implemented by
the Contactor.
4.5.5.3
Cumulative construction noise impact from the concurrent projects, if
any, should be considered and evaluated in the CNMP. The status of
potential planned developments (i.e. MWSD and HUD development) should be
reviewed at the time of preparing the CNMP.
4.6.1
Methodology
4.6.1.1
Road traffic noise impact assessment
is predicted based on the traffic flows, following strictly the procedures
stipulated in the “Calculation of Road Traffic Noise (CRTN)” (1988) published
by Department of Transport, UK. Road
traffic noise is presented in terms of noise levels exceeded for 10% of the
one-hour period having the peak traffic flow (i.e. L10,1hr
dB(A)). A 2.5 dB(A) facade reflection
and correction factors for effects due to gradient, distance, view angle, road
surface and barriers would be included in the assessment.
4.6.1.2
Traffic noise
levels were predicted based on the maximum traffic projections within 15 years
upon operation of the roadworks, with reference to Section 5.1 in Annex 13 of
the EIAO-TM. Based on the project
programme, the operation of the Project would tentatively commence in Year
2033. The assessment year for road
traffic noise is taken as Year 2048 which is the maximum traffic projection
within 15 years upon operation of the Project.
For the prevailing scenario, traffic data for year 2027 before the commencement
of construction works of the Project was adopted. Since the morning peak hour
traffic flows and vehicle compositions would be generally higher than afternoon
peak, therefore AM peak was selected for assessment. The AM peak hour traffic forecast adopted in
this assessment and TD’s endorsement are presented in Appendix 4.2.
4.6.1.3
Road traffic noise from the
road network, including both the “Project Roads” and “Other Roads” (existing
and other planned Roads) within the 300m assessment area, would be considered
in the assessment to predict the traffic noise impact on the representative
NSRs. The extent of “Project Roads” and
“Other Roads” is presented in Figure 4.4. All roads are described as one of the
following:
·
“Project Roads”: roads that are
completely new or existing road section with major modification or substantial
changes in alignment or characters due to the proposed Project like section of
Tsing Sha Highway and Cheung Tsing Highway; and
·
“Other Roads”: roads with the road
alignments remain unchanged or without substantial alteration by the proposed
Project, and any planned roads (i.e. Route 11 and HKIW-NEL Link) under other
projects.
4.6.1.4
The characteristics of the road
network such as road width, surface type, traffic flow, use of Low Noise Road
Surfacing (LNRS), and existing and committed noise mitigation measures have
been considered in the assessment.
Locations of existing and committed LNRS as well as existing and
committed noise mitigation measures had made reference to EPD’s Environmental
Database Central Portal and EIA report of Route 11.
4.6.1.5
For HKIW-NEL Link, location of
LNRS adopted had made reference to the Guidance Notes on Road Surface
Requirements for Expressways and High Speed Road issued by Highways
Department.
4.6.1.6
In accordance with the EIAO
GN No. 12/2023, the direct mitigation measures would be considered or
proposed if adverse noise impact due to “Project Roads” is predicted. If the NSRs are affected by noise from other
existing roads, direct mitigation measures are required to reduce the noise
from the concerned “Project Roads” to a level that it:
·
is not higher than the
standard; and
·
has no significant contribution
(less than 1.0 dB(A)) to the overall noise level, if the overall noise level
(i.e., noise from “Project Roads” together with “Other Roads”) exceeds the
noise standard.
(i)
The
predicted overall noise level, in L10(1hour), exceeds the noise
standard in accordance with EIAO-TM; and
(ii) The predicted overall noise level is at
least 1.0 dB(A) more than the prevailing traffic noise level, i.e. existing
total traffic noise level before commencement of any road works under the
Project; and
(iii) The contribution from the Project
Roads to the increase in the predicted overall noise level must be at least 1.0
dB(A).
4.6.2
Prediction and Evaluation of Road Traffic Noise
Impact
Prevailing
Scenario (Year 2027)
4.6.2.1
As stated in Section 4.4
and Table 4.7,
no existing NSRs at Tsing Yi and Ma Wan were identified within the 300m noise
assessment area. As such, road traffic
noise assessment for prevailing scenario in Year 2027 was only conducted for
existing NSRs in North Lantau. Referring
to Table 4.10 below, the predicted
prevailing noise level at Yi Chuen is 58 dB(A) which is far below the noise
criterion.
Unmitigated Scenario (Year 2048)
4.6.2.2
The “Project Roads” extent is
shown in Figure 4.4 and location of
representative NAPs that might be affected by road traffic noise have been
identified and presented in Table 4.7.
Computer plots of the traffic noise model are presented in Appendix 4.3.
4.6.2.3
Agreement on the noise
assessment area, representative NAPs and road sections to be included in the
road traffic noise assessment had been obtained from EPD in accordance with
Appendix C of the EIA SB.
4.6.2.4
In accordance with HyD's
guidance notes on road surface requirements, standard road surfacing materials,
which also serve as LNRS, would be applied to road sections of new road
projects with design speed of 80 km/hr or above. Such surfacing materials provide a noise
reduction performance of approximate 2.5dB(A) as compared with concrete paving.
It was confirmed with
HyD that LNRS would be applied to the road segments of TYLL with 80 km/hr or
above under unmitigated scenario (Appendix
4.4 refers). The presumed
extents of LNRS at proposed TYLL are presented in Figure 4.5.
4.6.2.5
The predicted road traffic
noise levels in Year 2048 at representative NAPs under unmitigated scenario are
presented in Table 4.10 and detailed in Appendix 4.5.
Table
4.10 Summary
of Predicted Road Traffic Noise Assessment Results in Year 2027 (Prevailing)
and Year 2048 (Unmitigated Scenario)
|
NSR
ID
|
NAP ID
|
Noise Criteria,
L10 1-hr
dB(A)
|
Prevailing
Noise Level in Year 2027,
L10 1hr dB(A) [1]
|
Max.
Predicted Noise Level in Year 2048, L10 1hr dB(A)
|
Max.
“Project Roads” Contribution, dB(A) [3]
|
Floor
with Noise Exceedance
|
Mitigation
Measure required?
|
|
Project
Roads
|
Other
Roads
|
Overall
|
|
Existing NSRs at Yi Chuen
|
|
YC
|
YC1
|
70
|
58
|
59
|
59
|
62
|
-
|
-
|
N
|
|
Existing NSRs at Tso Wan
|
|
TW
|
TW1
|
70
|
-
[2]
|
49
|
61
|
61
|
-
|
-
|
N
|
|
|
TW2
|
70
|
-
[2]
|
53
|
60
|
61
|
-
|
-
|
N
|
Notes:
[1] The
prevailing year assessment was based on the traffic data for year 2027 before
the commencement of construction works of the Project.
[2] No existing roads within 300m from this NAP that no value be
simulated.
[3] Only presented for the NAPs with overall noise levels exceeding
the noise criteria.
Identification of Assessment Area and NSRs
4.6.2.6
Identified NSRs and
representative NAPs that are affected by road traffic noise impact are
identified and presented in Table 4.7 above and depicted in Figure 4.2 and Figure 4.3.
Existing
Representative NSRs
4.6.2.7
As mentioned in Section 4.4,
existing NSRs are only identified at North Lantau, while there are no existing
NSRs within 300m assessment area at Tsing Yi West and Ma Wan. As shown in Table
4.10 above, the predicted road traffic noise levels at representative
existing NAPs would range from 61 to 62 dB(A) and hence noise mitigation
measures are not required.
4.6.2.8
As shown in Figure 4.3, TW2 is the only
representative NAP within 300m from the tunnel portals, and it is located at an
elevation much lower than the portals.
Considering the tunnel portals would be screened by the viaduct
structure itself or terrain and separated by more than 200m from TW2, adverse
noise impact from the portals is not anticipated.
Committed/Planned
NSRs
4.6.2.9
There are no committed/planned
NSRs within 300m assessment area.
Consideration
of Cumulative Impacts
4.6.2.10
As discussed in above Section 4.4.1.3, there is no concrete
implementation programme for MWSD and HUD development at the time of this EIA
study. Besides, the proposed developments have not yet obtained the rezoning
application approval. The cumulative impact from these projects (if any) would
be considered in separate studies of these projects by respective project
proponents. Notwithstanding the above, with the implementation of practicable
mitigation measures, no insurmountable road traffic noise impact in operational
phase is anticipated.
Existing Representative NSRs
4.6.3.1
There are no exceedances of
road traffic noise levels at existing NSRs, therefore no mitigation measures
would be required for existing NSRs. As no noise exceedance was predicted at
existing NSRs under unmitigated scenario, eligibility assessment for indirect
noise mitigation measures is not considered required.
Committed/Planned
NSRs
4.6.3.2
There are no committed/planned
NSRs within 300m from project boundary.
4.6.4
Evaluation of Residual Road Traffic Nosie Impact
4.6.4.1
According to Section 4.6.3,
adverse residual road traffic noise impact due to the Project is not
anticipated.
4.7.1.1
At the time of this EIA study,
it has been discussed with CEDD that a ventilation
building would be designed and constructed under HKIW-NEL Link, while the Overhead Ventilation Duct
(OHVD) inside the northbound tunnel under TYLL
connecting to the ventilation building under HKIW-NEL Link would be designed by
TYLL. There would be no ventilation
building / ventilation shaft under TYLL at this stage, and the OHVD inside the
tunnel (with implementation of proper noise mitigation measures, e.g. silencer)
is not expected to cause adverse noise impact to the surroundings. Nevertheless, the provision of individual / a
combined ventilation building would be further reviewed at later stage to take
into account the latest implementation programme of HKIW-NEL Link and TYLL. If the individual ventilation building is
confirmed to be constructed and operated under TYLL project, the Fixed Noise
Source Management Plan (FNMP) will be prepared to include the prevailing
background noise survey, the quantitative fixed noise source impact assessment,
noise mitigation measures and monitoring and audit programme, and submitted to
EPD before commencement of construction of the Project.
4.7.1.2
The proposed
Administration Building under Route 11 at Ng Kwu Leng would serve TYLL as
well. The
administration building of Route 11 is located more than 300m from any
identified NSRs and there will be a considerable level difference between the
ventilation building of HKIW-NEL Link and identified NSRs at Tso Wan, adverse fixed noise impact
arising from both administration building and ventilation building is not
anticipated.
4.7.1.3
Since no fixed noise sources
would be proposed under this Project at this stage, fixed noise sources impact
assessment is not considered required under this EIA study.
4.8.1
Construction Noise
4.8.1.1
Noise monitoring should be
carried out as part of the EM&A programme for the construction phase of the
Project to check compliance with the construction noise criteria.
4.8.1.2
A CNMP should evaluate the
potential construction noise impacts based on the latest construction programme
and construction plant inventory, and to assess the effectiveness and
practicality of all proposed noise mitigation measures. The CNMP would be prepared before the tender
invitation and commencement of construction works. The implementation of the mitigation measures
recommended in CNMP should also be audited as part of the EM&A
programme. Details of the EM&A
requirements are provided in a stand-alone EM&A Manual.
4.8.2
Operation Noise
4.8.2.1
As no adverse traffic noise
impact arising from the Project is anticipated, EM&A requirements are not
considered necessary.
4.8.2.2
As no fixed noise sources would
be proposed by the Project, EM&A requirements are not considered necessary.
4.9.1
Construction Noise
4.9.1.1
An assessment on construction
noise has been conducted according to the requirements in the EIA SB. With the adoption of proposed noise
mitigation measures, including the use of QPME, use of quieter equipment/method,
use of higher surface density site-hoarding, use of noise barrier / enclosure,
etc., adverse noise impact arising from construction works of the Project is
not anticipated. Nevertheless, a CNMP,
which contains a quantitative construction noise impact assessment, mitigation
measures and monitoring and audit programme, will be submitted before the
tender invitation and commencement of construction works.
4.9.2
Operation Noise
4.9.2.1
A road traffic noise impact
assessment has been conducted according to the requirements in EIA SB. No adverse road traffic noise impact would be
anticipated for all representative NSRs.
4.9.2.2
As there are no planned fixed
noise sources under the Project identified at this stage, fixed noise sources
impact assessment was not carried out under this EIA.