Contents

4            Noise  1

4.1           Legislation, Standards and Guidelines  1

4.2           Description of the Environment 6

4.3           Construction Noise Impact Assessment 23

4.4           Road Traffic Noise Impact Assessment 37

4.5           Fixed Noise Sources Impact Assessment 56

4.6           Aircraft Noise Impact Assessment 78

4.7           Rail Noise Assessment 79

4.8           Helicopter Noise Assessment 138

4.9           Marine Traffic Noise Assessment 142

4.10         Noise Implications Caused by Elements to be Implemented by SHO and SHD Replanning Works  142

4.11         Conclusion  143

 

 

Appendices

Appendix 4.1a  Photo of Existing NSR

Appendix 4.1b  NSRs and Area Sensitivity Rating Adopted in Fixed Noise and Rail Noise Assessments

Appendix 4.2    SWL of PME

Appendix 4.3    Locations of Workfronts and Phases of Construction

Appendix 4.4    Detailed PME Inventory

Appendix 4.5    Monthly Unmitigated Noise Contribution

Appendix 4.6    Unmitigated Construction Noise Impacts at Selected NSRs

Appendix 4.7    Unmitigated Construction Noise Impacts at Various Representative Floor Levels

Appendix 4.8    Sketch of Typical Temporary Noise Barrier/ Enclosure

Appendix 4.9    Monthly Mitigated Noise Contribution

Appendix 4.10  Mitigated Construction Noise Impacts at Selected NSRs

Appendix 4.11  Mitigated Construction Noise Impacts at Various Representative Floor Levels

Appendix 4.12  Computer Plot of Noise Model

Appendix 4.13  Key Map of Traffic Flow and Traffic Data at 2053

Appendix 4.14a Detailed Road Traffic Noise Level at NAPs (Unmitigated) for Phase 1

Appendix 4.14b         Detailed Road Traffic Noise Level at NAPs (Unmitigated) for Phase 1 to Phase 2

Appendix 4.14c Detailed Road Traffic Noise Level at NAPs (Unmitigated) for Phase 1 to Phase 3

Appendix 4.14d         Detailed Road Traffic Noise Level at NAPs (Unmitigated) for Full Occupation

Appendix 4.15a Detailed Road Traffic Noise Levels at NAPs (Mitigated) for Phase 1

Appendix 4.15b         Detailed Road Traffic Noise Levels at NAPs (Mitigated) for Phase 1 to Phase 2

Appendix 4.15c Detailed Road Traffic Noise Level at NAPs (Mitigated) for Phase 1 to Phase 3

Appendix 4.15d         Detailed Road Traffic Noise Level at NAPs (Mitigated) for Full Occupation

Appendix 4.16  Section Drawing for Fixed Noise

Appendix 4.17  Calculation of Cumulative Fixed Noise Impacts

Appendix 4.18  Not Used

Appendix 4.19  Not Used

Appendix 4.20  Not Used

Appendix 4.21  Unmitigated Detailed Rail Noise Calculation

Appendix 4.22  Typical Noise Canopy Sections

Appendix 4.22a Section Drawing for Selected NSRs

Appendix 4.23  Mitigated Detailed Rail Noise Calculation

Appendix 4.24  Not Used

Appendix 4.25  Cumulative Mitigated Rail and Fixed Plant Noise Calculation

Appendix 4.26  Helicopter Noise Assessment Area Determination

Appendix 4.27  Detailed Helicopter Noise Assessment Results

Appendix 4.28  Helicopter Noise Contour

 

 

Figures

Figure 4.1          Locations of Key Existing and Planned Noise Sources

Figure 4.1a        Base Scheme of the Project

Figure 4.1b        Modified Scheme for the Project

Figure 4.1c        Proposed Canopy for the Project

Figure 4.2a        NEF Contours (Year 2011)

Figure 4.2b        NEF Contours (Year 2021)

Figure 4.2c        NEF Contours (Year 2030)

Figure 4.2d        NEF Contours (Year 2032)

Figure 4.3          Locations of Representative Existing and Planned NSRs

Figure 4.3f        Locations of Prevailing Background Noise Measurement

Figure 4.4          Locations of Representative Noise Assessment Points (Construction Noise)

Figure 4.5          Locations of Representative Noise Assessment Points (Road Traffic Noise)

Figure 4.6          Overall Mitigation Measures for Road Traffic Noise and Rail Noise

Figure 4.6e        Noise Mitigation Measures for Rail Noise from Existing SHD Operation

Figure 4.7          Locations of Representative Noise Assessment Points (Fixed Noise)

Figure 4.7b        Location of Planned and Existing Fixed Noise Sources and NSRs

Figure 4.8          Locations of Representative Noise Assessment Points (Aircraft Noise)

Figure 4.9          Locations of Representative Noise Assessment Points (Rail Noise)

Figure 4.10        Locations of Representative Noise Assessment Points (Helicopter Noise)

 

 

4                                Noise

4.1                         Legislation, Standards and Guidelines

4.1.1                  General

4.1.1.1           The relevant legislation and associated guidance applicable to present the study for the assessment of noise impacts include:

·               Noise Control Ordinance (NCO) (Cap.400);

·               Technical Memoranda (TM) on Noise from Construction Work other than Percussive Piling (GW -TM);

·               TM on Noise from Percussive Piling (PP-TM);

·               TM on Noise from Places other than Domestic Premises, Public Places or Construction Sites (IND-TM); and

·               Environmental Impact Assessment Ordinance (EIAO) (Cap. 499) and EIAO-TM.

4.1.2                  Construction Noise

Construction Noise During Normal Hours

4.1.2.1           The NCO provides the statutory framework for noise control in Hong Kong. Assessment procedures and standards are set out in the respective TM promulgated under NCO.

4.1.2.2           To ensure a better environment, the EIAO-TM promulgated under the EIAO has imposed more stringent criteria. For construction, there is no statutory limit on daytime construction noise under the NCO and related TMs. Nevertheless, the EIAO-TM stipulates criteria of 65 - 75dB(A) for daytime construction activities, as shown in Table 4.1.

Table 4.1 Noise standards for construction activities

Uses

Noise Standards[1], Leq (30mins) dB(A)

0700 to 1900 hours

on any day not being a Sunday or general holiday

All domestic premises including temporary housing accommodation

75

Educational institutions including kindergartens, nurseries and all others where unaided voice communication is required

70

65 (During examinations)

Note:

[1]         The above standards apply to uses that rely on opened windows for ventilation.

4.1.2.3           In addition, reference has been made to EIAO Guidance Note No. 09/2010 on “Preparation of Construction Noise Impact Assessment under the Environmental Impact Assessment Ordinance”.

Construction Noise During Restricted Hours

4.1.2.4           The NCO also provides statutory control on general construction works during restricted hours (i.e. 1900 to 0700 hours (of the next day) from Monday to Saturday and at any time on Sundays or public holidays). The use of Powered Mechanical Equipment (PME) for construction works during restricted hours would require a Construction Noise Permit (CNP). The GW-TM details the procedures adopted by EPD for assessing such application. The granting of a CNP is subject to conditions stated in the CNP and it may be revoked at any time for failure to comply with the permit conditions.

4.1.2.5           Maximum noise levels from construction activities during restricted hours at affected Noise Sensitive Receivers (NSRs) are controlled under the TMs and shall not exceed the specified Acceptable Noise Levels (ANLs). These ANLs are stipulated in accordance with the Area Sensitivity Ratings established for the NSRs. The ANLs for construction works are summarised in Table 4.2.

Table 4.2 ANLs for construction during restricted hours

Time Period

ANLs for Area Sensitive Ratings[1], dB(A)

A

B

C

All weekdays during the evening (1900 to 2300 hours), and general holidays (including Sundays) during the day and evening (0700 to 2300 hours)

60

65

70

All days during the night-time (2300 to 0700 hours)

45

50

55

4.1.2.6           As defined in the Noise Control Designated Area Plan No. EPD/NP/NT-06, Siu Ho Wan Depot are not within the Designated Area. Therefore, the Project does not fall within the control of TM on Noise on Construction Work in Designated Areas (DA-TM).

4.1.2.7           Despite any description made in EIA report, there is no guarantee that a CNP will be issued for the project construction. The Noise Control Authority will consider a well-justified CNP application, once filed, 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 making a decision in granting a CNP. Nothing in the report shall bind the Noise Control Authority in making a decision. If a CNP is to be issued, the Noise Control Authority shall include in it any conditions demand. Failure to comply with any such conditions will lead to cancellation of the CNP and prosecution under the NCO.

Percussive Piling

4.1.2.8           Under the PP-TM, CNPs are also required for percussive piling involving the use of diesel, pneumatic and / or steam hammer. This TM specifies the permitted hours and other conditions for percussive piling. Table 4.3 lists the acceptable percussive piling noise levels for various types of NSR.

Table 4.3 ANLs for percussive piling

NSR Window Type or Means of Ventilation

ANL, dB(A)

(i)            NSR (or part of NSR) with no window or other opening

100

(ii)           NSR with central air conditioning system.

90

(iii)          NSR with windows or other openings but without central air conditioning system

85

4.1.2.9           Depending on the numbers and types of piling machines and the separation from NSRs, percussive piling may be restricted to 12, 5 or 3 hours per day. For NSRs that are particularly sensitive to noise, such as hospitals, medical clinics, educational institutions and courts of law, a further reduction of 10dB(A) shall be applied to the above ANLs.

4.1.3                  Operational Noise

4.1.3.1           The EIAO-TM (Annex 5 of TM) has stipulated the noise standards for various noise sources as shown in Table 4.4. It should, however, be noted that the following noise criteria are only applicable to uses that rely on opened windows for ventilation.

Table 4.4 Noise standards for operational phase

Common Uses

Noise Standards[1]

Aircraft Noise (Noise Exposure Forecast: NEF)

Helicopter Noise

Lmax dB(A)

0700-1900 hours

Road Traffic Noise

L10 (1hour) dB(A)

Rail

Noise[2]

Fixed Noise

Sources

All domestic premises including temporary housing accommodation

25

85

70

(a) The appropriate ANLs shown in Table 2 of the Technical Memorandum for the Assessment of Noise from Places Other than Domestic Premises, Public Places or Construction Sites and

(b) Lmax (2300-0700 hours)

= 85dB(A)

(a) 5dB(A) below the appropriate ANLs shown in Table 2 of the Technical Memorandum for the Assessment of Noise from Places Other than Domestic Premises, Public Places or Construction Sites, or

(b) the prevailing background noise levels (For quiet areas with level 5 dB(A) below the ANL)

Offices

30

90

70

Educational institutions including kindergartens, nurseries and all others where unaided voice communication is required

25

85

65

Hospitals, clinics, convalescences and homes for the aged, diagnostic rooms, wards

25

85

55

Notes:

[1] The above standards apply to uses that rely on opened windows for ventilation.

[2] The above standards should be viewed as the maximum permissible noise levels assessed at 1m from the external facade.

Road Traffic Noise

4.1.3.2           The criteria for assessing road traffic noise is given in the EIAO-TM and tabulated in Table 4.4. For domestic premises and offices, the criterion is 70dB(A). For educational institutes and places of worship, the criterion is 65dB(A). For hospitals, clinics etc, a more stringent criterion of 55dB(A) is stipulated. It should be noted that all these criteria only apply to NSRs that rely on opened windows for ventilation. In addition, reference has been made on EIAO Guidance Note No. 12/2010 on “Road Traffic Noise Impact under the Environmental Impact Assessment Ordinance”.

Fixed Noise Sources

4.1.3.3           Operational noise from fixed noise sources is controlled under the NCO’s TM on IND-TM. To plan for a better environment, the EIAO-TM has specified the following requirements for the planned fixed noise sources, whichever is more stringent.

·               5dB(A) below the appropriate ANLs in the IND-TM; or

·               the prevailing background noise levels.

4.1.3.4           The ANLs for different Area Sensitivity Ratings during different periods are summarised in Table 4.5.

4.1.3.5           Besides, ANL stipulated in the IND-TM has been adopted in the evaluation of potential cumulative fixed noise impact assessment from existing and planned fixed noise sources. This approach has been adopted in approved EIA reports for Tung Chung New Town Extension (TCNTE) (AEIAR-196/2016), Expansion of Hong Kong International Airport to a Three-way System (AEIAR-185/2014) and Lamma Power Station Units L4 & L5 Flue Gas Desulphurization Plan Retrofit Project (AEIAR-098/2006).

Table 4.5 ANLs for fixed noise sources


Time Period

ANL, dB(A)

Area Sensitivity Rating A

Area Sensitivity Rating B

Area Sensitivity Rating C

Day (0700 to 1900 hours)

60

65

70

Evening (1900 to 2300 hours)

60

65

70

Night (2300 to 0700 hours)

50

55

60

4.1.3.6           For assessing fixed noise sources, the Area Sensitivity Ratings at the NSRs are defined in accordance with the relevant TMs. More details are discussed in Section 4.5.2. Similar to the road traffic noise, all these criteria only apply to NSRs relying on opened windows for ventilation.

Aircraft Noise

4.1.3.7           The noise criterion for aircraft noise is given in Table 4.4. For aircraft noise, NSRs should be planned beyond the NEF25 contour, except for offices which should be beyond the NEF30 contour. Similar to the road traffic noise, all these criteria only apply to NSRs relying on opened windows for ventilation.

Rail Noise

4.1.3.8           The noise criterion for assessing rail noise is given in Table 4.4. In addition, noise level during the period between 11:00pm and 7:00am of the following day should not exceed Lmax 85dB(A). Similar to road traffic noise assessment, all these criteria only apply to NSRs relying on opened windows for ventilation.

Helicopter Noise

4.1.3.9           As shown in Table 4.4, for helicopter noise between 0700 – 1900, NSRs should be planned beyond having the noise impacts less than Lmax 85dB(A), except for offices which should be exposed to noise impacts not exceeding Lmax 90dB(A). Similar to the road traffic noise, all these criteria only apply to NSRs relying on opened windows for ventilation.

4.1.3.10      For the area in SHD in particular, the helicopters operated by both Government Flying Services (GFS) and commercial company would be using the airspace in the vicinity. GFS has a headquarters within the Hong Kong International Airport (HKIA) and its helicopters serve both routine and emergency services. According to the approved EIA report for TCNTE (AEIAR-196/2016), all the routine services (including flying support for all bureau and departments) would be conducted during daytime period only while emergency services (including air ambulance, search & rescue (SAR), supporting law enforcement agencies, firefighting) have to be conducted on an as-required basis to suit actual circumstances.

4.1.3.11      As discussed above, there would be helicopter events along Siu Ho Wan Depot for both evening and night-time periods. Since there is no relevant noise criteria in the EIAO-TM for both evening and night-time periods, reference has been made to the approved EIA report for A Rooftop Helipad at the Proposed New Block of Queen Mary Hospital (AEIAR-208/2017).  According to their findings, there is no statutory noise criterion for emergency services (including air ambulance, search & rescue (SAR), supporting law enforcement agencies, firefighting) during evening and night-time periods.  The emergency services are generally exempted from the flight restrictions.  

Marine Traffic Noise

4.1.3.12      There is no statutory requirement for marine traffic noise. The construction of the Project would not involve any marine works and hence construction vessels are not anticipated. Besides, there are neither existing nor planned marine routes within the 300m assessment area. Hence, marine traffic noise impacts are not anticipated during both construction and operational phases.

4.2                         Description of the Environment

4.2.1                  Existing Environment

4.2.1.1           As discussed in Section 1, the proposed development for comprehensive residential and commercial development is located on the existing SHD (Figure 1.1). The existing noise climate is dominated by the road traffic from North Lantau Highway (NLH), railways of Tung Chung Line (TCL) and Airport Express Line (AEL), aircraft approaching and departing from Hong Kong International Airport (HKIA), helicopter transiting and the operation of SHD with some minor fixed noise operations, such as SHW Government Maintenance Depot and New Lantao Bus Company Siu Ho Wan Depot, located at southeast to the proposed development.

4.2.2                  Noise Abatement Strategy

4.2.2.1           As discussed in Section 2, the proposed development consists of approximately 108 blocks of residential premises, three schools, commercial uses, car parks, club houses, sports centre, Public Transport Interchange (PTI) and kindergarten, etc.. As far as the residential blocks are concerned, the Base Scheme that was considered during the early design development (see Figure 4.1a) has been progressively refined and eventually evolved as the Modified Scheme (see Figure 4.1b) to abate various environmental constraints and avoid and minimize environmental impacts as much as practicable.  Those abatement measures are summarised below:

·           Adoption of self-protecting blocks with no noise sensitive façades directly facing NLH (about 30m to the south), TM-CLK Link slip road (about 40m to the south), Lantau Airport Railway (LAR) (about 20m to the south) and the railway tracks at both ends of the depot. These blocks are also designed in a curvative arrangement to address visual impact issues;

·           Provision of podium up to +26.5mPD to mitigate the noise impacts;

·           Adjustment of building disposition coupled with provision of acoustic windows at strategic locations to mitigate the noise impacts;

·           Provision of sections of noise canopy along the podium edge at +23mPD; and

·           Adoption of modified building blocks at strategic locations to minimize noise impacts.

4.2.2.2           As discussed in Section 2.4.3, the option of constructing noise barriers/enclosures at existing roads and LAR has been explored.  For abating road traffic noise, it should be noted that both TCL / AEL are aligned between the southern site boundary and NLH with a separation of approximately 30m.   If NLH is to be installed with direct noise mitigation measures, over 2km noise barrier/enclosure at NLH, coupled with retrofitted installation at the viaducts of TM-CLK Link and Tai Ho Interchange after structural strengthening, is required to shield the significant traffic noise.  Given that NLH and TM-CLK Link are the only external road links for Lantau/HKIA, extensive construction works required would cause unacceptable disturbance to the traffic on those strategic highway. Hence, the approach of providing mitigation at source is therefore not further considered. 

4.2.2.3           The option of installing a large cantilevered noise barrier extending from the podium of southern site boundary fronting NLH has also been considered. However, given the large separation of 30m between the southern boundary and NLH, the effectiveness of noise barriers along the southern site boundary to alleviate road traffic noise will not be effective and hence is not further considered.

4.2.2.4           The option to enclose the some 2km of the LAR is also found to be technically not feasible.  During the planning and preliminary design stage of SHO and SHD Replanning Works, the provision of noise enclosure on TCL/AEL tracks was reviewed. Review findings indicate only limited clearance at the either side of TCL/AEL tracks with existing depot facilities to the north, NLH and Tuen Mun Chek Lap Kok Link Road on the south. Such site constraints greatly reduce the constructability of noise enclosure on TCL/AEL tracks due to potential disturbance to existing SHD operation and also road traffic network of which temporary road closure required for supporting the construction. In addition, due to proximity of running tracks, the stringent railway protection measures for running tracks restricts the allowable working hour for the enclosure construction to less than 2 hours each night, leading to prolonged construction period of the noise enclosure which may affect other maintenance activities. Building structures close to high speed rail with speed about 130kph also introduce high suction force on objects in the vicinity, together with the prolonged construction period, construction of noise enclosure on TCL/AEL tracks create undesirable high risk affecting the normal service of TCL/AEL. It is therefore concluded that based on current design and operational information, the provision of noise enclosure on TCL/AEL tracks is not a practical and feasible mitigation proposal. In view of these, alternative noise mitigation measures with efficient and practicable construction method have been explored to be provided at the above ground structures of SHD Topside Development for protecting the future residents. 

4.2.2.5           On the adoption of self-protecting building design for the first row of residential blocks fronting NLH, it should be noted that NLH is a dual-3 express highway with a speed limit of 110 km/hour and high traffic volume. According to 2015 traffic census, this section of NLH had an Annual Average Daily Traffic (AADT) of 68,930, and a peak traffic flow of up to 4,200 veh / hr. It is also noted that the night-time traffic flow is also as high as 3,100 veh /hr. Besides, it is predicted that the peak traffic flow in Year 2053 (15 years after completion of the Project) will be up to about 14,000 vehicle/hour (two-way). It is also aligned at about 30m from the southern site boundary with the LAR in between.  The road traffic noise levels at the southern façade of the Project directly facing NLH is therefore would be up to 84dB(A) (L10) during peak hours.  Such a high noise level could not be effectively mitigated by implementing typical building design such as acoustic windows, reduced view angles etc.

4.2.2.6           In view of these, the use of self-protecting buildings fronting NLH is considered as the most practicable approach under the capacity development scheme formulated for this feasibility study. The use of non-sensitive uses to act as screening has also been duly considered. However, given the prime objective of the topside development is to provide as much housing as practicable to address issues on housing supply, the current design is to accommodate non-residential uses within the podium deck and residential blocks atop the podium. This being said, the use of self-protecting buildings could be further reviewed at the project implementation stage. Discussions on the consideration of layout options are also detailed in Section 2.

4.2.2.7           The Base Scheme accommodates 52 numbers of Type A building blocks and 56 numbers of Type B building blocks (Figure 4.1a).  To minimise the road traffic and rail noise impacts, a Modified Type B building layout is proposed. The main difference between Type B building blocks and Modified Type B building blocks is that Modified Type B building blocks would have some of the noise sensitive windows specially designed to reduce the view angle overlooking onto NLH / TM-CLK Link and TCL / AEL, and hence the associated road traffic noise and rail noise impacts respectively.  The Modified Scheme (Figure 4.1b) would replace some of the Type B building blocks by Modified Type B building blocks at some locations

4.2.2.8           The following sections summarise the noise issues that have been addressed by the Modified Scheme in terms of road traffic noise and rail noise.

Road Traffic Noise

4.2.2.9           As discussed above, at source mitigation measures for road traffic noise is not further considered.  Hence, a road traffic noise assessment has been conducted for the Base Scheme for different phases, including Phase 1 at Year 2026, Phase 2 at Year 2030, Phase 3 at Year 2034 and Phase 4 at Year 2038.

4.2.2.10      Phase 1 (Year 2027) - Result indicates that most of the planned NSRs would comply with the 70dB(A) noise criterion except at blocks 103, 104, 110, 111, 113, 114, 116, 117, 136, 139, 140, 143, 146 and 147 with Type B building blocks. The predicted noise levels would be 75dB(A) for the 1st to 10th floors, up to 74dB(A) for 11th or above floors, etc., exceeding the noise criterion of 70dB(A) by up to 5dB(A).  This is attributable to the fact that those NSRs are affected by the NLH via the openings between the building clusters.  As at source noise mitigation measures would not be further considered, it is recommended to adopt acoustic windows at the affected facades of these blocks to reduce road traffic noise impacts. Acoustic windows can generally provide a notional noise reduction of about 5dB(A) (Note: the noise reduction of acoustics windows would possibly be higher subject to detailed design), and hence would be sufficient to abate the traffic noise impact at these receivers.

4.2.2.11      For block 149 at the eastern site boundary of Phase 1c, the predicted noise levels before Phase 4 development would be 76dB(A) for the 1st to 15th floors, up to 75dB(A) for the 16th or above floors, etc., also exceeding the noise criterion of 70dB(A) by up to 6dB(A). Since acoustic windows can generally provide a notional noise reduction of about 5dB(A), the use of acoustic windows would not be sufficient to abate the noise impacts.  It is therefore recommended to adopt the Modified Type B building blocks which could be designed to achieve a higher noise reduction.

4.2.2.12      Phase 1 to Phase 2 (Year 2030) – As the setting of Phase 2 development (Type A building blocks) will be protected by self-protecting blocks for the first row of residential blocks from Phase 1 (i.e. Type B building blocks fronting NLH), all the planned NSRs in this phase would comply with the 70dB(A) noise criterion.

4.2.2.13      Phase 1 to Phase 3 (Year 2034) – Similar to Phase 2 development, with the self-protecting blocks from Phase 1 fronting NLH, all the planned NSRs in this phase would comply with the 70dB(A) noise criterion.

4.2.2.14      Phase 1 to Phase 4 (Year 2038) – Result indicates that most of the planned NSRs would comply with the 70dB(A) noise criterion except at blocks 401, 403, 404, 407, 408, 409, 420, 421 and 422. For blocks 404, 408, 409, 420, 421 and 422, the predicted noise levels would be up to 72dB(A) for the 1st to 10th floors, up to 74dB(A) for the 11th or above floors, etc. For blocks 401, 403 and 407, the predicted noise levels would be up to 77dB(A) for the 1st to 10th floors, up to 76dB(A) for the 11th or above floors, etc..  This is attributable to the fact that those NSRs are affected by the NLH via the openings between the building clusters.  Since acoustic windows can generally provide a notional noise reduction of about 5dB(A), it is recommended that those blocks (i.e. blocks 404, 408, 409, 420, 421 and 422) with exceedance up to 5dB(A) will be provided with acoustic windows at the affected facades.  For blocks 401, 403 and 407 with exceedance more than 5dB(A), Modified Type B building blocks would be adopted instead.

4.2.2.15      Hence, for addressing road traffic noise, Modified Type B building blocks are proposed for blocks 149, 401, 403 and 407 as illustrated in Figure 4.1b.

Rail Noise

4.2.2.16      Rail noise impact assessment has also been conducted for the Base Scheme, but with the proposed Modified Type B for building blocks 149, 401, 403 and 407 incorporated to address road traffic noise.

4.2.2.17      Phase 1 (Year 2027) - Result indicates that most of the planned NSRs would comply with the noise criteria (i.e. daytime and evening criterion of 70dB(A) and night-time of 60dB(A) for Area Sensitivity Rating C) except for blocks 103, 104, 110, 111, 113, 114, 116, 117, 118, 122, 123,  133, 136, 139, 140, 146 and 147.  The predicted noise levels would be up to 70dB(A) for the 1st to  10th floors, up to 69dB(A) for the 11th or above floors, etc., also exceeding the night-time noise criteria by up to 1 – 10dB(A).  This is attributable to the fact that those NSRs are affected by the AEL / TCL via the openings between the building clusters.

4.2.2.18      Unlike the case for road traffic noise, the TCL / AEL are located much closer to the southern site boundary and hence it is more effective to use canopy at +23 mPD to mitigate rail noise impacts. However, it should be noted that the extent of the canopy is constrained by a number of factors including 1) the need for smoke extracting strategy for staged development of the depot area; 2) the need for smoke extracting strategy for SHO and PTI located at Phase 1 development; 3) the practicability of routing smoke exhaust of depot area at about +17.1mPD to above +23 mPD (i.e. incompatibility with Emergency Vehicular Access (EVA), safety and technical constraints in erecting exhaust at +23mPD before podium construction) to provide continuous noise canopy; 4) the suitability of routing smoke exhaust of depot area above podium at +26.5mPD (i.e. visual impact, nuisance during routine testing and safety and technical constraints in erecting exhaust at +26.5mPD before podium construction).  In connection with this, the current proposed depot smoke discharge outlets will be arranged to prevent discharge under cover and that shall be further reviewed during detailed design stage. Potential concerns on smoke spilling into depot under a train fire at TCL / AEL main line will also need to be followed up during detailed design stage with relevant authorities.

4.2.2.19      Throughout the rail noise assessment, the effectiveness of installing a 15m wide canopy along the southern podium edge (Figure 4.1c) has been considered. Result however indicates that, even with the at source mitigation measures of 15m wide canopy, the predicted rail noise levels would still exceed the noise criterion by 2 – 3dB(A) at blocks 117, 118, 139 and 140.  This is attributable to the fact that Phase 1c development is not constructed at that time and hence it is not possible to extend the length of the noise canopy beyond the podium of Phase 1a and some sections of 15m wide noise canopy cannot shield the TCL / AEL as the alignment of TCL / AEL does not run parallel along southern podium edge.  Hence, it is necessary to consider adopting the Modified Type B building blocks at those locations. Therefore, additional numbers of Modified Type B building blocks are proposed for blocks 117, 139 and 140 to reduce the rail noise impacts as illustrated in Figure 4.1b.  For block 118 at the eastern boundary of Phase 1a development, the provision of canopy at Phase 1a alone is not sufficient to protect these NSRs before provision of Phase 1c noise canopy, Modified Type B building block is also recommended.

4.2.2.20      Phase 1 to Phase 2 (Year 2030) – As the setting of Phase 2 development (Type A building blocks) will be protected by self-protecting blocks for the first row of residential blocks (Type B building blocks fronting AEL / TCL) and noise canopy from Phase 1, all the planned NSRs in this phase would comply with respective noise criteria.

4.2.2.21      Phase 1 to Phase 3 (Year 2034) – Similar to Phase 2 development, with the self-protecting blocks fronting AEL / TCL and noise canopy from Phase 1, all the planned NSRs in this phase would comply with respective noise criteria.

4.2.2.22      Phase 1 to Phase 4 (Year 2038) - Result indicates that most of the planned NSRs would comply with the respective noise criteria.  However, for block 404 at which the predicted noise levels would be up to 66dB(A) for for the 1st to  12th floors, up to 65dB(A) for the 13th or above floors, etc..  Similar to Phase 1 development, two sections of noise canopy at +23 mPD is recommended along podium of Phase 4 development to address the consideration of smoke extracting strategy.  Result however indicates that, even with the at source mitigation measures of 15m wide canopy, the predicted rail noise levels would still exceed the noise criterion by 5dB(A).  This is attributable to the fact some sections of 15m wide noise canopy cannot shield the TCL / AEL as the alignment of TCL / AEL does not run parallel along southern podium edge.  Hence, it is necessary to consider adopting the Modified Type B building block at block 404 to reduce the rail noise impacts.

4.2.2.23      Hence, for addressing rail noise, Modified Type B building blocks are proposed for blocks 117, 118, 139, 140 and 404 as illustrated in Figure 4.1b.  Other than these blocks, there are some blocks that would be exposed to 5dB(A) less than the statutory criteria.   These blocks include 104, 111, 114, 116, 136 and 146.  The current Modified Scheme has proactively implemented Modified Type B building blocks at these locations.  During the subsequent detailed design stage, the need for these Modified Type B building blocks would be revisited as appropriate.

4.2.2.24      To summarise the concerns on road traffic noise and rail noise, the Base Scheme (Figure 4.1a) has been progressively refined during the design development to address and alleviate the road traffic noise and rail noise impacts, and eventually evolved as the Modified Scheme, which would replace Type B building blocks as Modified Type B building blocks at blocks 104, 111, 114, 116, 117, 118, 136, 139, 140, 146, 149, 401, 403, 404 and 407 as shown in Figure 4.1b.

4.2.3                  Noise Environment for With and Without Project

4.2.3.1           Without the topside development, existing SHD will be left as an open-air depot facility. Maintenance noise from the operation of the depot will possibly affect the surrounding. With the topside development in place, all the noise sources will be enclosed within building structures or the outdoor units will be installed with silencer or enclosure, etc. Hence, the noise environment for with project scenario will be properly controlled.

4.2.4                  Existing and Planned Noise Sources

4.2.4.1           The area for noise impact assessment generally includes all those areas within 300m from the site boundary. Table 4.6 shows the key existing noise sources and their locations are illustrated in Figure 4.1.

Table 4.6 List of key existing noise sources

Types

Noise Sources

Reference Location[1]

Type of Noise Source

Approximate Distance between Site Boundary, m

Existing Noise Sources

SHD

ENS01

Rail / Fixed

Within site boundary

TCL and AEL

ENS02

Rail

20m

Road Traffic from Existing NLH

ENS03

Road

30m

SHW Government Maintenance Depot

ENS04

Fixed

90m

Discovery Bay Tunnel Administration Building

ENS05

Fixed

110m

New Lantao Bus Company Siu Ho Wan Depot

ENS06

Fixed

140m

Helicopter

ENS07

Helicopter

[2]

Aircraft approaching and departing HKIA

ENS08

Aircraft

[3]

Notes:

[1]   Reference source no. is shown in Figure 4.1.

[2]   Although the GFS Headquarters is located at 7km away from the proposed development, helicopter noise due to pass-by is anticipated for the proposed development.

[3]   Although HKIA is located at 3.7km away from the proposed development, aircraft noise due to overflight is anticipated for the proposed development.

4.2.4.2           The nature and operation of these noise sources are described as follows.

Existing Noise Sources

SHD

4.2.4.3           The existing SHD provides essential maintenance and support facilities for the entire fleet of TCL, AEL and DRL. It will be replanned and located underneath the proposed SHD Topside Development. While potential rail and fixed noise impacts from the existing SHD during depot replanning will be addressed in a separate EIA for Siu Ho Wan Station and Siu Ho Wan Depot Replanning Works (Railway EIA) to be submitted separately for approval under EIAO, impacts from fixed noise and rail noise are therefore included and assessed in this EIA report.

TCL and AEL

4.2.4.4           TCL and AEL are located at south of SHD (Figure 4.1). According to MTR Corporation’s website, the existing headway for AEL is 10 minutes during peak hour and 12 minutes during non-peak hour and the maximum operating speed is about 135km/h. TCL generally runs along AEL and it terminates at Tung Chung Station. The headway of TCL is approximately 4 minutes during peak hour and approximately 12 minutes during non-peak hour.

4.2.4.5           For the section to the south of SHD near Pak Mong, both the AEL and TCL share common tracks which are on ballast and there are no barriers or other existing screening structures. Since the site is located next to the tracks, rail noise impacts are therefore addressed in this EIA report.

North Lantau Highway (NLH)

4.2.4.6           Similar to TCL and AEL, NLH is a highway linking HKIA, Lantau Island and Tsing Ma Bridge, locating at the south of SHD. It has an Annual Average Daily Traffic (AADT) of 68,930 in Year 2015 and is an expressway with three lanes in each direction for its entire length. The speed limit is 110km/h for the section within the assessment area. Road traffic noise impacts are therefore addressed in this EIA report.

SHW Government Maintenance Depot

4.2.4.7           SHW Government Maintenance Depot was operated since 2005 and it contains garage, depot and carparking facilities for the Electrical and Mechanical Services Department, Architectural Services Department and Highway department. The depot is fully enclosed with its ingress / egress located at southwest of the depot. The depot is located at 90m southeast to the site boundary. During site visit, it was observed that the maintenance works were carried out within the maintenance depot and there is no night-time maintenance work as advised by the on-site property management staff. In addition, as discussed in Section 2, no noise sensitive use premises in the proposed development will be facing the SHW Government Maintenance Depot. Hence, adverse fixed noise impacts are therefore not anticipated.

Discovery Bay Tunnel Administration Building

4.2.4.8           Discovery Bay Tunnel Administration Building is the administration and toll area for transportation accessing Discovery Bay and with louvers installed in the building. It is located at 110m southeast to the proposed development. During site visit, other than the louver, there was no other noisy fixed plants nor activities identified. As discussed in Section 2, no noise sensitive use premises in the proposed development will be facing the Discovery Bay Tunnel Administration Building. Hence, adverse fixed noise impacts are therefore not anticipated.

New Lantao Bus Company Siu Ho Wan Depot

4.2.4.9           New Lantao Bus Company Siu Ho Wan Depot includes bus parking facilities, sunket pit, car washing area, oil refuelling area. It is located at 140m southeast to the proposed development. During site visit, no noisy activities were in operation in the outdoor area. There is an indoor area encroached in the depot, where other maintenance works were carried out. As discussed in Section 2, no noise sensitive use premises in the proposed development will be facing the New Lantao Bus Company Siu Ho Wan Depot. Hence, adverse fixed noise impacts are therefore not anticipated.

Helicopter

4.2.4.10      GFS and Hong Kong Business Aviation Centre (HKBAC) are located at the south-western of the HKIA. GFS accommodates a total of seven helicopters (Super Puma AS332 L2 and EC 155 B1) which are mainly used for search and rescue (SAR), air ambulance, tactical police support, lifting loads and internal cargo, airborne monitoring, the carriage of government passengers. In addition, the existing helicopters will be replaced by a fleet of new helicopters, Airbus Helicopter H175. Deliveries will begin towards end 2017 with the first batch of three helicopters, followed by the remaining four in 2018.

4.2.4.11      There is a feasibility study by CEDD to relocating part of GFS emergency flying services to a forward base within the central part of Hong Kong, such that the flight path along North Lantau Expressway (NLE) Route during emergency could be released, and hence helicopter noise impact to the potential development along NLE could be eliminated. Since the relocation is still under planning stage, it is not included as an assumption in this EIA.

4.2.4.12      According to the approved EIA report for TCNTE (AEIAR-196/2016), all the business helicopter and routine tasks by GFS will be operated during daytime period. GFS’s main duty is to provide emergency services to Hong Kong, South China Sea and fulfil international rescue obligations. Their major types of services include air ambulance, SAR, supporting law enforcement agencies and fire fighting.

4.2.4.13      Other than the above emergency services, GFS also provides flying support to all Bureaux and Departments in the HKSAR. The more frequent ones are flying support for Lands Department to conduct aerial survey, transporting personnel of Home Affairs Department, Marine Department, Civil Aviation Department and Information Services Department for their operations; transporting Chief Executive and visiting foreign officials for visits in Hong Kong.

4.2.4.14      HKBAC provides a venue for business operation of the helicopters landing at HKIA including MD 902 Explorer, AgustaWestland AW139, Sikorsky S-76 and Sikorsky S-92A. According to their websites, MD 902 Explorer (http://hongkong.peninsula.com/en/~/media/Files/Hong-Kong/at-a-glance/phk-airport-transfer-en.pdf) will be used for flight between HKIA and Kowloon, while AgustaWestland AW139 (http://www.skyshuttlehk.com/?pid=our-heli-fleet), Sikorsky S-76 and Sikrosky S-92A (http://www.helis.com/database/org/cn_china_southern_airlines/) will be used for flight between HKIA and Macau, HKIA and Mainland China respectively. Both the GFS and HKBAC are located at approximately 7km northwest from the proposed development. Hence, noise impact generated from helicopter approaching, take-off and manoeuvring are not anticipated. Those for the helicopter routes along NLH are therefore addressed in this EIA report.

Aircraft approaching and departing HKIA

4.2.4.15      According to the approved 3RS EIA (AEIAR-185/2014), the NEF noise contours for the existing two runway option in year 2011 based on operational records and daily radar data is shown in Figure 4.2a. Based on this information, the NEF 25 contour in year 2011 will not encroach onto the site boundary. However, the existing two runway option will be expanded to three runway system, more details have been discussed in Section 4.6.

Planned Noise Sources

4.2.4.16      Other than the key existing noise sources within 300m from the site boundary, there are planned noise sources which may give rise to potential impacts on existing and future NSRs. They are listed in Table 4.2 and their associated locations are shown in Figure 4.1.

Table 4.7 List of key planned noise sources

Types

Noise Sources

Types of Noise Source

Reference Location[1]

Approximate Distance between proposed development, m

Possible Future Noise Sources from the Project

Sewage Pumping Station (SPS)

Construction / Fixed

PNS01

Within site boundary

Public Transport Interchange (PTI) / Proposed Development

Construction / Fixed

PNS02

Within site boundary

Eastern connection access on Sham Shui Kok Drive and Western access via Tai Ho Interchange

Construction / Road Traffic

PNS03

< 5m

SHD Replanning Works and Reprovisioned SHD

Construction / Rail / Fixed

PNS04

Within site boundary

SHO

Construction / Rail / Fixed

PNS05

< 50m

Possible Future Noise Sources by Others

Sewerage Network [2]

Construction

CNS01

Within site boundary

Tuen Mun – Chek Lap Kok Link (under construction) [2]

Road Traffic

CNS02

40m

Road P1 (Tung Chung – Tai Ho Section) [2]

Construction / Road Traffic

CNS03

50m

Expansion of Hong Kong International Airport into a Three-Runway System (3RS)

Aircraft

CNS04

4.5km

Additional Sewage Rising Mains and Rehabilitation of the Existing Sewage Rising Main between Tung Chung and Siu Ho Wan

Construction

CNS05

70m

Notes:

[1]   Reference source no. is shown in Figure 4.1.

[2]   According to TCNTE (AEIAR-196/2016).

4.2.4.17      The nature and operation of these noise sources are described as follows.

Sewage Pumping Station (SPS) / Public Transport Interchange (PTI) / Proposed Development

4.2.4.18      Construction of superstructures (including podium and residential blocks) of the Proposed Development would have potential construction noise impacts. Commercial uses, kindergartens and utility plant rooms will be enclosed inside podium. Mechanical plant such as chillers and pumps will be located inside plant rooms of podium and hence mechanical ventilation is required. The potential construction and fixed noise impacts from the ventilation louvers are therefore addressed in this EIA report.

4.2.4.19      Sewage from the proposed development will be delivered to SHWSTW for further processing via utilities connecting to existing SHWSTW. In addition, one ultimate sewage pumping station will be located at northeast of the proposed development with fully enclosed structure with exhaust / intake louvers. Potential construction noise and fixed noise impacts are therefore addressed in this EIA report.

4.2.4.20      A PTI is proposed to serve the residents in the proposed development. Key noise generating sources inside PTI usually include ventilation fans, idling engine and manoeuvring vehicles, etc. However, the PTI would be enclosed within the proposed podium underneath the proposed residential buildings, and the location of ingress and egress is designed with no-line-of-sight at the noise sensitive use. However, the potential construction noise and fixed noise impacts from ventilation fans are therefore addressed in this EIA report.

Eastern Connection Access on Sham Shui Kok Drive and Western Access via Tai Ho Interchange

4.2.4.21      There is an existing service road located to the east of the depot, which connects to the Sham Shui Kok Drive along the existing coastline. This service road would need to be widened slightly to fulfill the highway standards. According to the preliminary traffic assessment, most of the traffic from the development would be using the Tai Ho Interchange to the west of the proposed development. The western access, on the other hand, would be in form of a short viaduct of approximately 50m long connecting the podium to the Tai Ho Interchange to be constructed as part of the Tung Chung East development. The potential road traffic and construction noise impacts will be addressed in this EIA report.

SHD Replanning Works and Reprovisioned SHD

4.2.4.22      With the completion of depot replanning works, maintenance and support facilities will be covered by a podium deck. Only exhaust / intake louvers are expected to be the fixed noise sources. While potential construction noise, rail noise and fixed noise impacts from the existing SHD during depot replanning will be addressed in the Railway EIA, which would be submitted separately for approval under EIAO, impacts are therefore included and addressed in this EIA report.

SHO

4.2.4.23      SHO is proposed at the southwest of the proposed development to provide a more efficient means of transportation and reduce vehicular emission. Part of current TCL and AEL tracks would need to be re-aligned accordingly. The rail noise impact from the realigned tracks and the existing tacks of TCL and AEL will be addressed in this EIA report. While potential construction noise and fixed noise impacts will be addressed in the Railway EIA, which would be submitted separately for approval under EIAO, impacts are therefore included and addressed in this EIA report.

Sewerage Network (By others)

4.2.4.24      Sewerage network is planned under the approved EIA report for TCNTE (AEIAR-196/2016), which is located along the seafront of the site boundary and connected to the SHWSTW. The associated cumulative construction noise impacts are therefore addressed in this EIA report.

Tuen Mun – Chek Lap Kok Link (TM-CLK Link) (under construction) (By others)

4.2.4.25      According to the approved EIA report for TM-CLK Link (AEIAR-146/2009), the link will provide a direct route linking North West New Territories and North Lantau. It would run along the southwest of the proposed development. Road traffic noise impacts are therefore addressed in this EIA report.

Road P1 (Tung Chung – Tai Ho Section) (By others)

4.2.4.26      The Road P1 (Tung Chung – Tai Ho Section) with road speed 50km/h is a planned road under the approved EIA report for TCNTE (AEIAR-196/2016) located to west of the site boundary. Road traffic noise impacts and cumulative construction noise impacts are therefore addressed in this EIA report.

Expansion of Hong Kong International Airport into a Three-Runway System (3RS) (By others)

4.2.4.27      According to the approved EIA report for 3RS (AEIAR-185/2014), the NEF noise contours at year 2021, 2030 and 2032 have been predicted. The NEFs as published from that approved EIA report are shown in Figure 4.2b to Figure 4.2d. More details have been discussed in Section 4.6.3 of the EIA report.

Additional Sewage Rising Mains and Rehabilitation of the Existing Sewage Rising Main between Tung Chung and Siu Ho Wan (By others)

4.2.4.28      According to the Construction of Additional Sewage Rising Mains and Rehabilitation of the Existing Sewage Rising Main between Tung Chung and Siu Ho Wan – Investigation, Design and Construction carried out by Drainage Services Department (DSD) under the Agreement No. CE 6/2012, twin 1,200mm diameter rising main will be adopted for conveying the planned sewage flow from Tung Chung and the airport to the SHWSTW.  Cumulative construction noise impacts are addressed in this EIA report.

4.2.5                  Prevailing Noise Levels

4.2.5.1           Prevailing noise levels have been measured within the Subject Site.  Figure 4.3f shows the locations of prevailing noise measurements.  A summary of the results are given in the Table 4.8a.

Table 4.8a Prevailing noise measurement

ID

Monitoring Location

Prevailing Noise Levels[1], dB(A)

Daytime and Evening[2]

Night-time[2]

M01

Roof of Main Depot Building in SHD (Facing NW)

61

59

M02

Roof of Main Depot Building in SHD (Facing SE)

62

60

M03

In the Vicinity of Building AB11 Transformer Room (Facing SE)

71

64

Notes:

[1]   Prevailing noise levels include facade correction.

[2]   Day: 0700 to 1900 hours, Evening: 1900 to 2300 hours, Night: 2300 to 0700 hours.

4.2.6                  Noise Sensitive Receivers

4.2.6.1           With reference to Annex 13 of the EIAO-TM, NSRs include residential uses (all domestic premises including temporary housing), institutional uses (educational institutions including kindergarten and nurseries), hospitals, medical clinics, homes for the aged, convalescent homes, places of worship, libraries, court of law, performing arts centres, auditoria and amphitheatres, country park and others.

4.2.6.2           Representative NSRs within the assessment area have been identified with the first layer of NSRs selected for assessment. These NSRs cover all existing sensitive developments, committed and planned NSRs during construction and operational phases.

4.2.6.3           According to the Clause 3.4.5.2 of Study Brief, existing, committed and planned NSRs shall be identified on relevant Outline Zoning Plans(OZPs), Development Permission Area (DPA) Plans, Outline Development Plans (ODP), Layout Plans (LP) and other relevant published land use plans, including plans and drawings published by the Lands Department (LandsD) and any land use and development applications approved by the Town Planning Board, in the vicinity of the Project. The existing NSRs are identified by means of topographic maps (10NW12c-d, 10NW21a-d, 10NW22a-d, 10SW1a-b and 9SE5a-b) aerial photos (CW113128 and CW113262), land status plan and site inspections. Planned / committed NSRs are identified by making reference to the statutory and departmental plans and plans and drawings published by LandsD covering the vicinity of the Project. These include the Approved Tung Chung Extension Area OZP No. S/I-TCE/2, the Draft Tai Ho OZP No. S/I-TH/1, the Siu Ho Wan LP No. L/I-SHW/1A and North-East Lantau Outline Development Plan No. D/I-NEL/1. The examination of the statutory plans also reveals that no land use and development applications have been approved by Town Planning Board in the vicinity of the Project. As advised by CEDD, “Technical Study on Developments at Siu Ho Wan and the Associated Transport Infrastructures – Feasibility Study” is still under on-going study and there is no committed land uses and implementation programme available.

4.2.6.4           The existing representative NSR (i.e. Lantau North (Extension) Country Park) in the vicinity is identified. The photo of existing representative NSR is shown in Appendix 4.1a. There is no other existing and committed NSRs within the 300m assessment area.

4.2.6.5           As discussed in Section 4.2, the Base Scheme (see Figure 4.1a) has been evolved to the Modified Scheme (see Figure 4.1b) with the consideration of constraints of the existing environment including road traffic noise and rail noise.  The Modified Scheme has been adopted for subsequent noise assessments.

4.2.6.6           The planned representative NSRs within the site boundary are identified in Table 4.8 and illustrated in Figure 4.3. Appendix 4.1b indicates the associated Area Sensitivity Ratings of NSRs under fixed noise and rail noise assessments.

Table 4.8 Existing and planned representative NSRs

ID[1]

Uses[2]

No. of Domestic Storey

NAP[3]

Existing NSR

N01

C

N/A[4]

N01-01 to N01-02

Planned NSRs[5]

Phase 1a

101

R

17

101-01, 101-03 to 101-06

103

R

18

103-01, 103-03 to 103-06

104

R

18

104-01 to 104-04

107

R

18

107-01, 107-03 to 107-06

108

R

18

108-01, 108-03 to 108-06

110

R

18

110-01, 110-03 to 110-06

111

R

19

111-01 to 111-04

113

R

19

113-01, 113-03 to 113-06

114

R

19

114-01 to 114-04

116

R

19

116-01 to 116-04

117

R

19

117-01 to 117-04

118

R

19

118-01 to 118-04

Phase 1a to Phase 1b

119

R

15

119-01, 119-03 to 119-06

122

R

16

122-01, 122-03 to 122-06

123

R

16

123-01, 123-03 to 123-06

125

R

16

125-01, 125-03 to 125-06

126

R

16

126-01, 126-03 to 126-06

129

R

16

129-01, 129-03 to 129-06

130

R

17

130-01, 130-03 to 130-06

132

R

17

132-01, 132-03 to 132-06

133

R

17

133-01, 133-03 to 133-06

135

R

17

135-01, 135-03 to 135-06

801

E

1

801-01

Phase 1a to Phase 1c

136

R

19

136-01 to 136-04

139

R

20

139-01 to 139-04

140

R

20

140-01 to 140-04

142

R

20

142-01, 142-03 to 142-06

143

R

20

143-01, 143-03 to 143-06

146

R

21

146-01 to 146-04

147

R

21

147-01, 147-03 to 147-06

149

R

21

149-01 to 149-04

Phase 1 to Phase 2

201

R

16

201-01 to 201-04

202

R

16

202-01

203

R

16

203-01

206

R

16

206-01

207

R

17

207-01

208

R

18

208-01

211

R

17

211-01

212

R

17

212-01 to 212-02

215

R

18

215-01 to 215-04

216

R

19

216-01

217

R

19

217-01

218

R

19

218-01

501

E

7

501-01 to 501-05

802

E

1

802-01 to 802-02

Phase 1 to Phase 3

301

R

19

301-01

303

R

19

303-01 to 303-07

304

R

19

304-01

305

R

19

305-01

307

R

20

307-01 to 307-06

308

R

21

308-01 to 308-02

309

R

22

309-01 to 309-03

310

R

18

310-01 to 310-04

311

R

18

311-01 to 311-02

312

R

18

312-01

313

R

20

313-01

315

R

20

315-01

318

R

21

318-01

601

E

7

601-01 to 601-09

803

E

1

803-01

Phase 1 to Phase 4

401

R

21

401-01 to 401-04

403

R

21

403-01 to 403-04

404

R

22

404-01 to 404-04

407

R

22

407-01 to 407-04

408

R

20

408-02 to 408-18

409

R

20

409-01 to 409-18

410

R

22

410-01

411

R

22

411-01

413

R

22

413-01

414

R

21

414-01 to 414–15

415

R

21

415-01 to 415-02

417

R

21

417-01

419

R

21

419-01 to 419-14

420

R

22

420-01 to 420-19

421

R

22

421-01 to 421-18

422

R

22

422-01 to 422-12

701

E

7

701-01 to 701-08

804

E

1

804-01

Notes:

[1]   The above standards apply to uses that rely on opened windows for ventilation. These standards should be viewed as the maximum permissible noise levels assessed at 1 m from the external façade.

[2]   R – Residential Premises, E – Educational Institutions, C – Country Parks

[3]   NAP equals to Noise Assessment Points.

[4]   N/A – Not Applicable, In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR. However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

[5]   According to the Clause 3.2.1, Clause 4.2.1, Clause 5.2.1, Clause 6.2.1, Clause 7.2.1 and Clause 8.2.1 of Appendix C of Study Brief (ESB-294/2016), the planning parameters and conditions together with constraints identified for the Project have been reviewed and agreed with relevant Government bureaux/departments, including Planning Department and Lands Department, under separate submissions by the Project Proponent.

4.3                         Construction Noise Impact Assessment

4.3.1                  Construction Noise Impact Assessment Methodology

4.3.1.1           The construction noise impact assessment during daytime, on weekdays other than general holidays has been assessed in accordance with the methodology in paragraphs 5.3 and 5.4 of Annex 13 of the TM.

4.3.1.2           Construction noise assessment has been conducted based on the following procedures:

·           Determine 300m from the site boundary and associated works;

·           Identify and locate representative NSRs that may be affected by the works;

·           Obtain the construction method and work sequence for the construction period;

·           Obtain the construction plant inventory for each corresponding construction work sequence;

·           Determine the SWLs of the plant items according to the information stated in the GW-TM or other recognised sources of reference, where appropriate;

·           Calculate the correction factors based on the distance between the NSRs and the notional noise source positions of the work sites;

·           Apply corrections for façade, distance, barrier attenuation, acoustic reflection where applicable;

·           Predict construction noise levels at the NSRs;

·           Quantify the level of impact at the NSRs, in accordance with GW-TM;

·           Predict the cumulative noise impacts for any concurrent construction works in the vicinity of the proposed work;

·           For any exceedance of noise criteria, all practical mitigation measures such as alternative construction methodology, quiet plant, silencer, enclosure, etc, shall be examined to alleviate the predicted noise impacts as much as practicable; and

·           Consideration of noise mitigation measures will follow Annex 13 of EIAO-TM and EIAO Guidance Note “Preparation of Construction Noise Impact Assessment under the Environmental Impact Assessment Ordinance” [GN 9/2010].

4.3.2                  Identification of Construction Noise Impact

Identification of Assessment Area and Noise Sensitive Receivers

4.3.2.1           For construction noise assessment, the assessment area includes those within 300m from site boundary and the works of the Project. Representative NSR locations that would be affected by the construction activities have been selected from Table 4.8 and are summarised in Table 4.9 below. They are also shown in Figure 4.4. Agreement with the Director on the assessment area and noise assessment points has been obtained prior to the commencement of the assessment.

Table 4.9 Representative NSRs for construction noise assessment

ID[1]

Uses[2]

No. of Domestic Storey

NAP[3]

SHD Topside Development EIA

Existing NSRs

N01

C

N/A[4]

N01-01 to N01-02

Planned NSRs

101

R

17

101-06

107

R

18

107-06

108

R

18

108-06

114

R

19

114-04

118

R

19

118-04

119

R

15

119-06

126

R

16

126-06

135

R

17

135-06

136

R

19

136-04

142

R

20

142-06

143

R

20

143-06

149

R

21

149-04

215

R

18

215-01

501

E

7

501-04

307

R

20

307-01

309

R

22

309-02

601

E

7

601-08

401

R

21

401-04

407

R

22

407-04

Railway EIA

Existing NSR

N01

C

N/A

N01-01

Planned NSRs

101

R

17

101-06

107

R

18

107-06

108

R

18

108-06

114

R

19

114-04

118

R

19

118-04

119

R

15

119-06

126

R

16

126-06

135

R

17

135-06

136

R

19

136-04

142

R

20

142-06

143

R

20

143-06

149

R

21

149-04

215

R

18

215-01

307

R

20

307-01

309

R

22

309-02

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   R – Residential Premises, C – Country Parks, E – Educational Institutions.

[3]   NAP – Noise Assessment Point.

[4]   N/A – Not Applicable. In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR. However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

Inventory of Noise Sources

4.3.2.2           It should be noted that SHO as well as SHD replanning works, which would include construction of the foundation and concrete slab for podium decking of Phases 1 to 4, will be separately implemented and hence their impacts will be addressed in the Railway EIA, which would be submitted separately for approval under EIAO. However, the superstructure for Phase 1 to 4 will be constructed under this Project. Cumulative construction noise impacts have been addressed in this EIA report. Key construction activities have been identified for noise assessment. The major construction works would include the following activities:

·         Construction of Sewage Pumping Station;

·         Construction of new rising main connecting the proposed SPS to existing Siu Ho Wan Sewage Treatment Works;

·         Road widening works on Sham Shui Kok Drive;

·         Construction of western access via Tai Ho Interchange;

·         Construction of Phase 1 to Phase 4 superstructures including podium decking and residential blocks;

·         Construction of SHO and associated track works; and

·         SHD replanning works, which include construction of concrete slab for podium decking for Phase 1 to Phase 4.

4.3.2.3           In addition, cumulative impacts from concurrent projects include following construction activities:

·         Construction of Road P1 (Tung Chung – Tai Ho Section);

·         Construction of Tung Chung East sewerage network; and

·         Construction of additional sewage rising mains and rehabilitation of the existing sewage rising main between Tung Chung and Siu Ho Wan.

4.3.2.4           These construction activities would be carried out with the use of Powered Mechanical Equipment (PME) including breakers, excavators, lorries, mobile cranes, concrete pumps, concrete mixers, pokers, rollers, etc. Sound Power Levels (SWLs) for each PME would be established according to GW-TM and other relevant information as appropriate.

4.3.2.5           The tentative population in-take year and inventory of noise sources for NSR at different development phases are shown in Table 4.9a below.

Table 4.9a Tentative population in-take year and inventory of noise sources for NSR at different development phases

NSR ID

Development Phase

Tentative Population In-Take Year

Inventory of Noise Sources

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

[9]

[10]

N01

-

-

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

101

Phase 1a

Apr 2026

-

-

Y

-

Y

Y

Y

-

Y

-

107

Phase 1a

Apr 2026

-

-

Y

-

Y

Y

Y

-

Y

-

108

Phase 1a

Apr 2026

-

-

Y

-

Y

Y

Y

-

Y

-

114

Phase 1a

Apr 2026

-

-

Y

-

Y

Y

Y

-

Y

-

118

Phase 1a

Apr 2026

-

-

Y

-

Y

Y

Y

-

Y

-

119

Phase 1b

Oct 2026

-

-

Y

-

Y

Y

Y

-

Y

-

126

Phase 1b

Oct 2026

-

-

Y

-

Y

Y

Y

-

Y

-

135

Phase 1b

Oct 2026

-

-

Y

-

Y

Y

Y

-

Y

-

136

Phase 1c

Apr 2027

-

-

Y

-

Y

-

Y

-

Y

-

142

Phase 1c

Apr 2027

-

-

Y

-

Y

-

Y

-

Y

-

143

Phase 1c

Apr 2027

-

-

Y

-

Y

-

Y

-

Y

-

149

Phase 1c

Apr 2027

-

-

Y

-

Y

-

Y

-

Y

-

501

Phase 2a

[11]

-

-

Y

-

Y

-

Y

-

-

-

215

Phase 2b

July 2030

-

-

Y

-

Y

-

Y

-

-

-

307

Phase 3a

Jan 2034

-

-

Y

-

Y

-

Y

-

-

-

309

Phase 3a

Jan 2034

-

-

Y

-

Y

-

Y

-

-

-

601

Phase 3b

July 2034

-

-

Y

-

Y

-

Y

-

-

-

401

Phase 4a

Jan 2035

-

-

Y

-

Y

-

-

-

-

-

407

Phase 4a

Jan 2035

-

-

Y

-

Y

-

-

-

-

-

Notes:

Project:

[1] Construction of Sewage Pumping Station.

[2] Construction of new rising main connecting the proposed SPS to existing Siu Ho Wan Sewage Treatment Works.

[3] Road widening works on Sham Shui Kok Drive.

[4] Construction of western access via Tai Ho Interchange.

[5] Construction of Phase 1 to Phase 4 superstructures including podium decking and residential blocks.

[6] Construction of SHO and associated track works.

[7] SHD replanning works, which include construction of concrete slab for podium decking for Phase 1 to Phase 4.

Concurrent Project:

[8] Construction of Road P1 (Tung Chung – Tai Ho Section).

[9] Construction of Tung Chung East sewerage network.

[10] Construction of additional sewage rising mains and rehabilitation of the existing sewage rising main between Tung Chung and Siu Ho Wan.

[11] As the design, implementation arrangement and programme of the schools is not available at this stage, worst scenario has been adopted for construction noise assessment.

Utilization Rates and SWLs of Powered Mechanical Equipment

4.3.2.6           Practically, the PMEs will not be operating for all times within a work site. The utilization rates would depend on the construction sequences, work fronts scale and construction nature. In this assessment, the utilization rates have been reviewed by the engineer and have been concluded to be practical for the purpose of this EIA. Appendix 4.2 tabulates the adopted utilisation rates.

4.3.3                  Prediction and Evaluation of Construction Noise Impact

Phases of Construction

4.3.3.1           As discussed in Section 2.7, the proposed development will be implemented in 4 phases with a total of 10 development packages. This phasing strategy would depend on a number of considerations. The final landuse options and its implementation strategy form the implementation assumption for the construction noise assessment. The construction programme with phases of construction has been given in Appendix 2.1 and Appendix 4.3. Agreement with the Director on the phases of construction has been obtained prior to the commencement of the assessment.

Scenarios

4.3.3.2           An in-house program has been used for construction noise calculations. Initially, program runs were conducted without any mitigation measures (i.e. the “Unmitigated Scenario”). Where noise level exceedance was identified, further runs would be made assuming different combinations of mitigation measures to be incorporated (i.e. the “Mitigated Scenario”).

Prediction of Noise Impact

4.3.3.3           According to the latest design, construction would mainly comprise the activities as described in Section 4.3.2. The corresponding SWLs of these activities have been estimated according to the PME’s SWLs and the assessment methodology in the GW-TM. Appendix 4.2 presents the SWLs for each PME. Appendix 4.4 gives the plant inventory adopted for each workfront and Appendix 4.3 shows the locations of workfronts adopted for this construction noise assessment.

4.3.3.4           The monthly unmitigated noise contribution and impacts from different phases of construction during the construction period have been conducted in accordance with the work programme given in Appendix 4.5. Appendix 4.6 and Appendix 4.7 present the calculated construction noise impacts at selected representative NSRs and at various representative floor levels respectively. The predicted construction noise impacts at the NSRs under unmitigated scenario are summarised in table below.

Table 4.10 Predicted construction noise impact at NSRs under unmitigated scenario

No.[1]

NAP[2][3]

Uses[4]

Leq (30mins), dB(A)

Criteria[5]

Unmitigated Noise Level[6]

Exceedance[5]

SHD Topside Development EIA

Existing NSRs

N01

N01-01

C

N/A[7]

72

-

N01-02

C

N/A[7]

67

-

Planned NSRs

101

101-06

R

75

85

10

107

107-06

R

75

83

8

108

108-06

R

75

83

8

114

114-04

R

75

82

7

118

118-04

R

75

84

9

119

119-06

R

75

84

9

126

126-06

R

75

84

9

135

135-06

R

75

85

10

136

136-04

R

75

85

10

142

142-06

R

75

85

10

143

143-06

R

75

84

9

149

149-04

R

75

86

11

215

215-01

R

75

84

9

501

501-04

E

70 (65)

68

- (3)

307

307-01

R

75

80

5

309

309-02

R

75

83

8

601

601-08

E

70 (65)

69

- (4)

401

401-04

R

75

84

9

407

407-04

R

75

82

7

Railway EIA[8]

Existing NSR

N01

N01-01

C

N/A[7]

59

-

Planned NSRs

101

101-06

R

75

81

6

107

107-06

R

75

78

3

108

108-06

R

75

78

3

114

114-04

R

75

80

5

118

118-04

R

75

81

6

119

119-06

R

75

70

-

126

126-06

R

75

71

-

135

135-06

R

75

75

-

136

136-04

R

75

81

6

142

142-06

R

75

82

7

143

143-06

R

75

81

6

149

149-04

R

75

86

11

215

215-01

R

75

79

4

307

307-01

R

75

77

2

309

309-02

R

75

81

6

Cumulative

Existing NSR

N01

N01-01

C

N/A[7]

72

-

N01-02

C

N/A[7]

67

-

Planned NSRs

101

101-06

R

75

85

10

107

107-06

R

75

84

9

108

108-06

R

75

83

8

114

114-04

R

75

82

7

118

118-04

R

75

84

9

119

119-06

R

75

84

9

126

126-06

R

75

84

9

135

135-06

R

75

85

10

136

136-04

R

75

85

10

142

142-06

R

75

85

10

143

143-06

R

75

84

9

149

149-04

R

75

87

12

215

215-01

R

75

84

9

501

501-04

E

70 (65)

68

- (3)

307

307-01

R

75

80

5

309

309-02

R

75

83

8

601

601-08

E

70 (65)

69

- (4)

401

401-04

R

75

84

9

407

407-04

R

75

82

7

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   NAP – Noise Assessment Point.

[3]   The first layer of NSRs within 300m from site boundary is included.

[4]   R – Residential Premises, C – Country Parks, E – Educational Institutions.

[5]   Values in parentheses indicate the noise criterion during examination period (Jan, Feb, May and June) of educational institution.

[6]   Bolded values mean exceedance of the relevant noise criteria.

[7]   N/A – Not Applicable. In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR. However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

[8]   Results extracted from Railway EIA (ESB-296/2016).

4.3.3.5           It can be seen from the above table that without any mitigation measures, exceedances of noise criteria range from 5 to 12 dB(A) for residential premises and 3 to 4 dB(A) for education institution during examination period. Details of construction noise impacts for different phasing are given in Appendix 4.5. Mitigation measures are therefore required.

4.3.3.6           The total number of dwellings, classrooms and other noise sensitive receivers that will be exposed to noise impact exceeding the criteria set in Annex 5 in the EIAO-TM have been calculated. It is predicted that a total of about 7750 dwellings and 70 classrooms will be exposed to construction noise impact under unmitigated scenario.

4.3.4                  Mitigation of Construction Noise Impact

4.3.4.1           The predicted noise levels show that the unmitigated construction noise impacts would exceed the daytime noise criteria. Mitigation measures are therefore required. The following mitigation measures have been considered:

·         Good site practices to limit noise emissions at the source;

·         Use of quality powered mechanical equipment (QPME); and

·         Use of temporary noise barriers and noise enclosure to screen noise from relatively static PMEs.

4.3.4.2           The above mitigation measures would need to be implemented in work sites as good practices where appropriate. Detailed descriptions of these mitigation measures are given in the following sections.

(A)  Good Site Management Practices

4.3.4.3           Good site practice and noise management techniques could considerably reduce the noise impact from construction site activities on nearby NSRs. The following measures should be practised during each phase of construction:

·                  only well-maintained plant should be operated on-site and plant should be serviced regularly during the construction programme;

·                  machines and plant (such as trucks, cranes) that may be in intermittent use should be shut down between work periods or should be throttled down to a minimum;

·                  plant known to emit noise strongly in one direction, where possible, be orientated so that the noise is directed away from nearby NSRs;

·                  silencers or mufflers on construction equipment should be properly fitted and maintained during the construction works;

·                  mobile plant should be sited as far away from NSRs as possible and practicable; and

·                  material stockpiles, site office and other structures should be effectively utilised, where practicable, to screen noise from on-site construction activities.

4.3.4.4           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.

(B)   Use of Quality Powered Mechanical Equipment (QPME)

4.3.4.5           The use of quiet plant associated with the construction works is made reference to the PME listed in the TM or the QPME/ other commonly used PME listed in EPD web pages as far as possible which includes the SWLs for specific quiet PME. It is generally known (supported by field measurement) that particular models of construction equipment are quieter than standard types given in the GW-TM. Whilst it is generally considered too restrictive to specify that the Contractor has to use specific models or items of plant, it is reasonable and practicable to propose plant noise performance specifications for specific PME so that some flexibility in selection of plant is allowed.

(C)  Use of Movable Noise Barrier and Full Enclosure for Relatively Fixed Plant Source

4.3.4.6           Movable temporary noise barriers that can be located close to noisy plant and be moved concurrently with the plant along a worksite can be very effective for screening noise from NSRs. The Contractor shall be responsible for design of the movable temporary noise barriers 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 minimum surface density of the movable noise barrier is 10kg/m2. This measure is particularly effective for low level zone of NSRs. A cantilevered top cover would be required to achieve screening benefits at upper floors of NSRs.

4.3.4.7           Movable temporary noise barriers will be used for some PME (e.g. excavator). It is anticipated that suitably designed barriers could achieve at least 5dB(A) reduction for movable plant and 10dB(A) for stationary plant.

4.3.4.8           The use of standard enclosure has been considered in this assessment to shelter relatively fixed plant including air compressor, generator. These standard enclosures can provide at least 15dB(A) noise reduction.

4.3.4.9           A summary of the movable temporary noise barrier and standard enclosure adopted for various PMEs is given in Appendix 4.2 and indicative drawing for barrier and standard enclosure is shown in Appendix 4.8, and the associated noise reduction is summarised in Table 4.11 below. The feasibility, practicability, programming and effectiveness of the above mitigation measures have been reviewed by engineer.

Table 4.11 Summary of barrier and standard enclosure adopted for PMEs

PME

Enclosure / Barrier

Attenuation, dB(A)

Air Compressor

Enclosure

-15

Asphalt Paver

Barrier

-5

Bar Bender and Cutter (Electric)

Barrier

-10

Hand Held Breaker

Barrier

-10

Concrete Lorry Mixer

Barrier

-5

Concrete Pump

Enclosure

-15

Mobile Crane

Barrier

-5

Compactor, Vibratory

Barrier

-5

Grinder

Barrier

-5

Dump Truck

Barrier

-5

Drill Rig, Rotary Type (Diesel)

Barrier

-10

Excavator

Barrier

-5

Backhoe

Barrier

-5

Generator

Enclosure

-15

Grout Mixer

Enclosure

-15

Grout Pump

Enclosure

-15

Hoist, Passenger/Material (Petrol)

Barrier

-5

Lorry

Barrier

-5

Piling, Diaphragm Wall, Hydraulic Extractor

Barrier

-5

Piling, Large Dia Bored, Reverse Circulation Drill

Barrier

-10

Power Rammer (Petrol)

Barrier

-10

Vibratory Poker

Barrier

-10

Vibrating Hammer

Barrier

-10

Poker, Vibratory, Hand-Held (Electric)

Barrier

-10

Roller

Barrier

-5

Roller, Vibratory

Barrier

-5

Saw, Concrete

Barrier

-10

Water Pump (Electric)

Barrier

-10

Water Pump, Submersible (Electric)

Barrier

-10

Assessment Results of Construction Noise under Mitigated Scenario

4.3.4.10      With the adoption of the above mitigation measures, the monthly mitigated noise contribution and impacts from different phases of construction during the construction period have been conducted in accordance with the work programme given in Appendix 4.9.

4.3.4.11      Appendix 4.10 and Appendix 4.11 present a summary of the calculated construction noise impacts at selected representative NSRs and at various representative floor levels for mitigated scenario respectively. Cumulative impact from concurrent projects stated in Section 4.3.2 to those identified NSRs has been evaluated and the predicted construction noise impacts at the NSRs are summarised in the Table 4.12.

Table 4.12 Predicted construction noise impact at NSRs under mitigated scenario

No.[1]

NAP[2][3]

Uses[4]

Leq (30mins), dB(A)

Criteria[5]

Mitigated Noise Level[6]

Exceedance[5]

SHD Topside Development EIA

Existing NSRs

N01

N01-01

C

N/A[7]

59

-

N01-02

C

N/A[7]

56

-

Planned NSRs

101

101-06

R

75

72

-

107

107-06

R

75

70

-

108

108-06

R

75

70

-

114

114-04

R

75

68

-

118

118-04

R

75

71

-

119

119-06

R

75

71

-

126

126-06

R

75

71

-

135

135-06

R

75

71

-

136

136-04

R

75

71

-

142

142-06

R

75

72

-

143

143-06

R

75

71

-

149

149-04

R

75

74

-

215

215-01

R

75

71

-

501

501-04

E

70 (65)

55

-

307

307-01

R

75

68

-

309

309-02

R

75

71

-

601

601-08

E

70 (65)

57

-

401

401-04

R

75

72

-

407

407-04

R

75

70

-

Railway EIA[8]

Existing NSR

N01

N01-01

C

N/A[7]

59

-

Planned NSRs

101

101-06

R

75

75

-

107

107-06

R

75

73

-

108

108-06

R

75

73

-

114

114-04

R

75

75

-

118

118-04

R

75

75

-

119

119-06

R

75

70

-

126

126-06

R

75

71

-

135

135-06

R

75

73

-

136

136-04

R

75

75

-

142

142-06

R

75

74

-

143

143-06

R

75

74

-

149

149-04

R

75

75

-

215

215-01

R

75

75

-

307

307-01

R

75

69

-

309

309-02

R

75

73

-

Cumulative

Existing NSR

N01

N01-01

C

N/A[7]

60

-

N01-02

C

N/A[7]

56

-

Planned NSRs

101

101-06

R

75

75

-

107

107-06

R

75

74

-

108

108-06

R

75

74

-

114

114-04

R

75

75

-

118

118-04

R

75

75

-

119

119-06

R

75

73

-

126

126-06

R

75

72

-

135

135-06

R

75

73

-

136

136-04

R

75

75

-

142

142-06

R

75

74

-

143

143-06

R

75

75

-

149

149-04

R

75

75

-

215

215-01

R

75

75

-

501

501-04

E

70 (65)

55

-

307

307-01

R

75

70

-

309

309-02

R

75

74

-

601

601-08

E

70 (65)

57

-

401

401-04

R

75

72

-

407

407-04

R

75

70

-

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   NAP – Noise Assessment Points.

[3]   The first layer of NSRs within 300m from site boundary is included.

[4]   R – Residential Premises, C – Country Parks, E – Educational Institutions.

[5]   Values in parentheses indicate the noise criterion during examination period (Jan, Feb, May and June) of educational institution.

[6]   Bolded values mean exceedance of the relevant noise criteria.

[7]   N/A – Not Applicable. In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR. However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

[8]   Results extracted from Railway EIA (ESB-296/2016).

4.3.4.12      From Table 4.12, cumulative construction noise impact arising from the Project and other committed projects at all the planned and existing NSRs including residential premises and schools during normal and examination periods can be properly mitigated by implementing the proposed noise control measures. The construction noise impact at Country Park (N01) ranges from 56 to 60dB(A).  Given the transient nature of visitor using hiking trails and mitigation measures are recommended to reduce the noise emission, adverse noise impact is not anticipated.

4.3.4.13      Details of construction noise impact at different phasing are given in Appendix 4.9. There would be no number of dwellings, classrooms and other sensitive receivers that will be exposed to noise impact exceeding the criteria set in Annex 5 in the EIAO-TM.

4.3.5                  Evaluation of Residual Construction Noise Impact

4.3.5.1           Construction noise impact arising from the Project at all the planned and existing NSRs including residential premises, country parks and schools during normal and examination periods can be properly mitigated by implementing the proposed noise control measures and the predicted noise levels would comply with the EIAO-TM normal daytime criteria. There would be no dwellings, classrooms and other sensitive receivers that will be exposed to adverse residual construction noise impact exceeding the criteria set in Annex 5 in the EIAO-TM.

4.4                         Road Traffic Noise Impact Assessment

4.4.1                  Road Traffic Noise Impact Assessment Methodology

4.4.1.1           Road traffic noise calculation is based on the method of UK Department of Transport “Calculation of Road Traffic Noise (CRTN)”. The predicted noise levels at the sensitive receivers include 2.5dB(A) facade reflection and correction factors of effects due to gradient, distance, view angle, road surface and barriers.

4.4.1.2           The computer programme, RoadNoise 2000, has been used to model traffic noise from road networks. It complies with the Calculation of Road Traffic Noise (CRTN) developed by the UK Department of Transport. The road traffic noise has been presented in terms of noise levels exceeded for 10% of the one-hour period during peak traffic flow [i.e. L10(1hr) dB(A)].

4.4.1.3           Calculations of future road traffic noise are based on the peak hourly flow for the maximum traffic projected within a 15 years period upon full operation of the roadworks or full occupation of the NSRs. The traffic projection has taken into account the induced traffic due to the operation of other planned roads and committed projects as below:

·         Hong Kong – Zhuhai – Macao Bridge Hong Kong Boundary Crossing Facilities (AEIAR-145/2009);

·         Hong Kong – Zhuhai – Macao Bridge Hong Kong Link Road (AEIAR-144/2009);

·         Tuen Mun – Chek Lap Kok Link (AEIAR-146/2009);

·         Expansion of HKIA into a Three-Runway System (AEIAR-185/2014);

·         Tung Chung New Town Extension (AEIAR-196/2016);

·         North Commercial District of Hong Kong International Airport; and

·         Topside Development at HZMB HKBCF.

4.4.1.4           Since the first population intake and ultimate occupation year of the Project will be in Year 2026 and 2038 respectively, the assessment year for road traffic noise has been taken as Year 2053 (which is the maximum traffic projection within 15 years after full operation for the proposed development). Figure 4.5 shows the 300m from the site boundary which would be modelled by RoadNoise. Computer plots for the prevailing scenario and with project scenario are shown in Appendix 4.12. In addition, following phasings have been conducted:

·         Phase 1[1] – population intake at April 2027;

·         Phase 1 to Phase 2 – population intake at January 2030;

·         Phase 1 to Phase 3 – population intake at January 2034;

·         Full occupation (Phase 1 to Phase 4) – population intake at July 2038.

4.4.2                  Identification of Road Traffic Noise Impact

Identification of Assessment Area and Noise Sensitive Receivers

4.4.2.1           For operational road traffic noise assessment, the assessment area for the road traffic noise impact includes those within 300m from the site boundary of the Project. Representative NSRs locations have been selected from Table 4.8 and are summarised in the table below and illustrated in Figure 4.5. Agreement with the Director on the assessment area and noise assessment points has been obtained prior to the commencement of the assessment.

Table 4.13 Representative NSRs for road traffic noise assessment

ID[1]

Uses[2]

No. of Domestic Storey

NAP[3]

Planned NSRs

Phase 1

101

R

17

101-01, 101-03 to 101-06

103

R

18

103-01, 103-03 to 103-06

104

R

18

104-01 to 104-04

107

R

18

107-01, 107-03 to 107-06

108

R

18

108-01, 108-03 to 108-06

110

R

18

110-01, 110-03 to 110-06

111

R

19

111-01 to 111-04

113

R

19

113-01, 113-03 to 113-06

114

R

19

114-01 to 114-04

116

R

19

116-01 to 116-04

117

R

19

117-01 to 117-04

118

R

19

118-01 to 118-04

119

R

15

119-01, 119-03 to 119-06

122

R

16

122-01, 122-03 to 122-06

123

R

16

123-01, 123-03 to 123-06

125

R

16

125-01, 125-03 to 125-06

126

R

16

126-01, 126-03 to 126-06

129

R

16

129-01, 129-03 to 129-06

130

R

17

130-01, 130-03 to 130-06

132

R

17

132-01, 132-03 to 132-06

133

R

17

133-01, 133-03 to 133-06

135

R

17

135-01, 135-03 to 135-06

136

R

19

136-01 to 136-04

139

R

20

139-01 to 139-04

140

R

20

140-01 to 140-04

142

R

20

142-01, 142-03 to 142-06

143

R

20

143-01, 143-03 to 143-06

146

R

21

146-01 to 146-04

147

R

21

147-01, 147-03 to 147-06

149

R

21

149-01 to 149-04

801

E

1

801-01

Phase 1 to Phase 2

201

R

16

201-01 to 201-03

206

R

16

206-01

211

R

17

211-01

212

R

17

212-01 to 212-02

215

R

18

215-03

501

E

7

501-01 to 501-05

802

E

1

802-01 to 802-02

Phase 1 to Phase 3

301

R

19

301-01

303

R

19

303-01

304

R

19

304-01

305

R

19

305-01

307

R

20

307-01 to 307-04

308

R

21

308-01

309

R

22

309-01

310

R

18

310-01

311

R

18

311-01

312

R

18

312-01

601

E

7

601-01 to 601-09

803

E

1

803-01

Phase 1 to Phase 4

401

R

21

401-01 to 401-04

403

R

21

403-01 to 403-04

404

R

22

404-01 to 404-04

407

R

22

407-01 to 407-04

408

R

20

408-02 to 408-18

409

R

20

409-01 to 409-18

414

R

21

414-01

415

R

21

415-01 to 415-02

419

R

21

419-01 to 419-13

420

R

22

420-01 to 420-19

421

R

22

421-01 to 421-17

422

R

22

422-01 to 422-12

701

E

7

701-01 to 701-08

804

E

1

804-01

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   R – Residential Premises, E – Educational Institutions

[3]   NAP – Noise Assessment Point

Inventory of Noise Sources

4.4.2.2           Major road traffic noise sources include roads in the vicinity of the site boundary and the associated road networks such as NLH and TM-CLK Link being implemented. The Road P1 (Tung Chung – Tai Ho Section) under the approved EIA report for TCNTE (AEIAR-196/2016) are also included. Also, the eastern connection access on Sham Shui Kok Drive and western access via Tai Ho Interchange are included. Hence, road traffic noise impacts on planned NSRs have been assessed accordingly. Details of traffic forecast at assessment year 2053 are given in Appendix 4.13. Agreement with the Director on the road sections has been obtained prior to the commencement of the assessment.

4.4.3                  Prediction and Evaluation of Road Traffic Noise Impact

Scenarios

4.4.3.1           The road traffic noise impact assessment of the Project has been conducted with respect to the criteria set in Annex 5 of the TM (See Section 4.1.3).

4.4.3.2           The road traffic noise model adopted in the EIA includes following scenarios:

·               Unmitigated scenario at assessment year 2053 for Phase 1 population intake in year 2027 (Appendix 4.14a);

·               Mitigated scenario at assessment year 2053 Phase 1  population intake in year 2027 (Appendix 4.15a);

·               Unmitigated scenario at assessment year 2053 for Phase 1 to Phase 2 population intake in year 2030 (Appendix 4.14b);

·               Mitigated scenario at assessment year 2053 for Phase 1 to Phase 2 population intake in year 2030 (Appendix 4.15b);

·               Unmitigated scenario at assessment year 2053 for Phase 1 to Phase 3 population intake in year 2034 (Appendix 4.14c);

·               Mitigated scenario at assessment year 2053 for Phase 1 to Phase 3 population intake in year 2034 (Appendix 4.15c);

·               Unmitigated scenario at assessment year 2053 (Maximum traffic projection within 15 years after full occupation, i.e. Phase 1 to Phase 4 in year 2038) (Appendix 4.14d); and

·               Mitigated scenario at assessment year 2053 (Maximum traffic projection within 15 years after full occupation, i.e. Phase 1 to Phase 4 in year 2038) (Appendix 4.15d).

4.4.3.3           Maximum traffic projection within 15 years after full occupation in year 2038 is predicted to occur in year 2053. For conservative purpose, year 2053 is selected for the assessment year for all chosen representative scenarios. The validity of traffic flow prediction adopted in the road traffic noise assessment has been confirmed with Transport Department (TD).

Prediction of Noise Impact

4.4.3.4           The predicted road traffic noise levels at each representative NSRs under unmitigated scenario in different phases are presented in Table 4.14. Appendix 4.14 shows the details of the noise impacts at different levels of the NSRs under unmitigated scenario in different phases.

Table 4.14a Predicted road traffic noise impact at existing and planned NSRs under unmitigated scenario (Phase 1)

ID[1]

Uses[2]

No. of Domestic Storey

NAP[3]

Criteria, L10 (1hr) dB(A)

Noise Impact, L10 (1hr) dB(A)[4]

Mitigation Measures Required [Y/N]

Planned NSRs

Phase 1

101

R

17

101-01, 101-03 to 101-06

70

<55 - 67

N

103

R

18

103-01, 103-03 to 103-06

70

<55 - 75

Y

104

R

18

104-01 to 104-04

70

<55

N

107

R

18

107-01, 107-03 to 107-06

70

<55 - 69

N

108

R

18

108-01, 108-03 to 108-06

70

<55 - 68

N

110

R

18

110-01, 110-03 to 110-06

70

<55 - 75

Y

111

R

19

111-01 to 111-04

70

<55

N

113

R

19

113-01, 113-03 to 113-06

70

<55 - 75

Y

114

R

19

114-01 to 114-04

70

<55

N

116

R

19

116-01 to 116-04

70

<55

N

117

R

19

117-01 to 117-04

70

<55

N

118

R

19

118-01 to 118-04

70

<55

N

119

R

15

119-01, 119-03 to 119-06

70

<55 - 63

N

122

R

16

122-01, 122-03 to 122-06

70

<55 - 69

N

123

R

16

123-01, 123-03 to 123-06

70

<55 - 69

N

125

R

16

125-01, 125-03 to 125-06

70

<55 - 64

N

126

R

16

126-01, 126-03 to 126-06

70

<55 - 70

N

129

R

16

129-01, 129-03 to 129-06

70

<55 - 67

N

130

R

17

130-01, 130-03 to 130-06

70

<55 - 65

N

132

R

17

132-01, 132-03 to 132-06

70

<55 - 69

N

133

R

17

133-01, 133-03 to 133-06

70

<55 - 70

N

135

R

17

135-01, 135-03 to 135-06

70

<55 - 69

N

136

R

19

136-01 to 136-04

70

<55

N

139

R

20

139-01 to 139-04

70

<55

N

140

R

20

140-01 to 140-04

70

<55

N

142

R

20

142-01, 142-03 to 142-06

70

<55 - 70

N

143

R

20

143-01, 143-03 to 143-06

70

57 - 72

Y

146

R

21

146-01 to 146-04

70

<55

N

147

R

21

147-01, 147-03 to 147-06

70

<55 - 75

Y

149

R

21

149-01 to 149-04

70

<55

N

801

E

1

801-01

65

67

Y

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   R – Residential Premises, E – Educational Institutions

[3]   NAP – Noise Assessment Point

[4]   Bolded values mean exceedance of the relevant noise criteria.

Table 4.14b Predicted road traffic noise impact at existing and planned NSRs under unmitigated scenario (Phase 1 to Phase 2)

ID[1]

Uses[2]

No. of Domestic Storey

NAP[3]

Criteria, L10 (1hr) dB(A)

Noise Impact, L10 (1hr) dB(A)[4]

Mitigation Measures Required [Y/N]

Planned NSRs

Phase 1

101

R

17

101-01, 101-03 to 101-06

70

<55 - 67

N

103

R

18

103-01, 103-03 to 103-06

70

<55 - 75

Y

104

R

18

104-01 to 104-04

70

<55

N

107

R

18

107-01, 107-03 to 107-06

70

<55 - 69

N

108

R

18

108-01, 108-03 to 108-06

70

<55 - 68

N

110

R

18

110-01, 110-03 to 110-06

70

<55 - 75

Y

111

R

19

111-01 to 111-04

70

<55

N

113

R

19

113-01, 113-03 to 113-06

70

<55 - 75

Y

114

R

19

114-01 to 114-04

70

<55

N

116

R

19

116-01 to 116-04

70

<55

N

117

R

19

117-01 to 117-04

70

<55

N

118

R

19

118-01 to 118-04

70

<55

N

119

R

15

119-01, 119-03 to 119-06

70

<55 - 63

N

122

R

16

122-01, 122-03 to 122-06

70

<55 - 69

N

123

R

16

123-01, 123-03 to 123-06

70

<55 - 69

N

125

R

16

125-01, 125-03 to 125-06

70

<55 - 64

N

126

R

16

126-01, 126-03 to 126-06

70

<55 - 70

N

129

R

16

129-01, 129-03 to 129-06

70

<55 - 67

N

130

R

17

130-01, 130-03 to 130-06

70

<55 - 65

N

132

R

17

132-01, 132-03 to 132-06

70

<55 - 69

N

133

R

17

133-01, 133-03 to 133-06

70

<55 - 70

N

135

R

17

135-01, 135-03 to 135-06

70

<55 - 69

N

136

R

19

136-01 to 136-04

70

<55

N

139

R

20

139-01 to 139-04

70

<55

N

140

R

20

140-01 to 140-04

70

<55

N

142

R

20

142-01, 142-03 to 142-06

70

<55 - 70

N

143

R

20

143-01, 143-03 to 143-06

70

57 - 72

Y

146

R

21

146-01 to 146-04

70

<55

N

147

R

21

147-01, 147-03 to 147-06

70

<55 - 75

Y

149

R

21

149-01 to 149-04

70

<55

N

801

E

1

801-01

65

67

Y

Phase 1 to Phase 2

201

R

16

201-01 to 201-03

70

55 - 67

N

206

R

16

206-01

70

<55 - 64

N

211

R

17

211-01

70

56 - 70

N

212

R

17

212-01 to 212-02

70

<55 - 67

N

215

R

18

215-03

70

<55 - 63

N

501

E

7

501-01 to 501-05

65

<55 - 65

N

802

E

1

802-01 to 802-02

65

66 - 67

Y

Notes:   

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   R – Residential Premises, E – Educational Institutions

[3]   NAP – Noise Assessment Point

[4]   Bolded values mean exceedance of the relevant noise criteria.

Table 4.14c Predicted road traffic noise impact at existing and planned NSRs under unmitigated scenario (Phase 1 to Phase 3)

ID[1]

Uses[2]

No. of Domestic Storey

NAP[3]

Criteria, L10 (1hr) dB(A)

Noise Impact, L10 (1hr) dB(A)[4]

Mitigation Measures Required [Y/N]

Planned NSRs

Phase 1

101

R

17

101-01, 101-03 to 101-06

70

<55 - 67

N

103

R

18

103-01, 103-03 to 103-06

70

<55 - 75

Y

104

R

18

104-01 to 104-04

70

<55

N

107

R

18

107-01, 107-03 to 107-06

70

<55 - 69

N

108

R

18

108-01, 108-03 to 108-06

70

<55 - 68

N

110

R

18

110-01, 110-03 to 110-06

70

<55 - 75

Y

111

R

19

111-01 to 111-04

70

<55

N

113

R

19

113-01, 113-03 to 113-06

70

<55 - 75

Y

114

R

19

114-01 to 114-04

70

<55

N

116

R

19

116-01 to 116-04

70

<55

N

117

R

19

117-01 to 117-04

70

<55

N

118

R

19

118-01 to 118-04

70

<55

N

119

R

15

119-01, 119-03 to 119-06

70

<55 - 63

N

122

R

16

122-01, 122-03 to 122-06

70

<55 - 69

N

123

R

16

123-01, 123-03 to 123-06

70

<55 - 69

N

125

R

16

125-01, 125-03 to 125-06

70

<55 - 64

N

126

R

16

126-01, 126-03 to 126-06

70

<55 - 70

N

129

R

16

129-01, 129-03 to 129-06

70

<55 - 67

N

130

R

17

130-01, 130-03 to 130-06

70

<55 - 65

N

132

R

17

132-01, 132-03 to 132-06

70

<55 - 69

N

133

R

17

133-01, 133-03 to 133-06

70

<55 - 70

N

135

R

17

135-01, 135-03 to 135-06

70

<55 - 69

N

136

R

19

136-01 to 136-04

70

<55

N

139

R

20

139-01 to 139-04

70

<55

N

140

R

20

140-01 to 140-04

70

<55

N

142

R

20

142-01, 142-03 to 142-06

70

<55 - 70

N

143

R

20

143-01, 143-03 to 143-06

70

57 - 72

Y

146

R

21

146-01 to 146-04

70

<55

N

147

R

21

147-01, 147-03 to 147-06

70

<55 - 75

Y

149

R

21

149-01 to 149-04

70

<55

N

801

E

1

801-01

65

67

Y

Phase 1 to Phase 2

201

R

16

201-01 to 201-03

70

55 - 67

N

206

R

16

206-01

70

<55 - 64

N

211

R

17

211-01

70

56 - 70

N

212

R

17

212-01 to 212-02

70

<55 - 67

N

215

R

18

215-03

70

<55 - 62

N

501

E

7

501-01 to 501-05

65

<55 - 65

N

802

E

1

802-01 to 802-02

65

66 - 67

Y

Phase 1 to Phase 3

301

R

19

301-01

70

<55 - 66

N

303

R

19

303-01

70

55 - 67

N

304

R

19

304-01

70

<55 - 65

N

305

R

19

305-01

70

<55 - 66

N

307

R

20

307-01 to 307-04

70

56 - 70

N

308

R

21

308-01

70

59 - 67

N

309

R

22

309-01

70

62 - 68

N

310

R

18

310-01

70

<55 - 66

N

311

R

18

311-01

70

<55 - 67

N

312

R

18

312-01

70

<55 - 66

N

601

E

7

601-01 to 601-09

65

<55 - 71

Y

803

E

1

803-01

65

<55

N

Notes:   

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   R – Residential Premises, E – Educational Institutions

[3]   NAP – Noise Assessment Point

[4]   Bolded values mean exceedance of the relevant noise criteria.

Table 4.14d Predicted road traffic noise impact at existing and planned NSRs under unmitigated scenario (full occupation after Phase 4)

ID[1]

Uses[2]

No. of Domestic Storey

NAP[3]

Criteria, L10 (1hr) dB(A)

Noise Impact, L10 (1hr) dB(A)[4]

Mitigation Measures Required [Y/N]

Planned NSRs

Phase 1

101

R

17

101-01, 101-03 to 101-06

70

<55 - 67

N

103

R

18

103-01, 103-03 to 103-06

70

<55 - 75

Y

104

R

18

104-01 to 104-04

70

<55

N

107

R

18

107-01, 107-03 to 107-06

70

<55 - 69

N

108

R

18

108-01, 108-03 to 108-06

70

<55 - 68

N

110

R

18

110-01, 110-03 to 110-06

70

<55 - 75

Y

111

R

19

111-01 to 111-04

70

<55

N

113

R

19

113-01, 113-03 to 113-06

70

<55 - 75

Y

114

R

19

114-01 to 114-04

70

<55

N

116

R

19

116-01 to 116-04

70

<55

N

117

R

19

117-01 to 117-04

70

<55

N

118

R

19

118-01 to 118-04

70

<55

N

119

R

15

119-01, 119-03 to 119-06

70

<55 - 63

N

122

R

16

122-01, 122-03 to 122-06

70

<55 - 69

N

123

R

16

123-01, 123-03 to 123-06

70

<55 - 69

N

125

R

16

125-01, 125-03 to 125-06

70

<55 - 64

N

126

R

16

126-01, 126-03 to 126-06

70

<55 - 70

N

129

R

16

129-01, 129-03 to 129-06

70

<55 - 67

N

130

R

17

130-01, 130-03 to 130-06

70

<55 - 65

N

132

R

17

132-01, 132-03 to 132-06

70

<55 - 69

N

133

R

17

133-01, 133-03 to 133-06

70

<55 - 70

N

135

R

17

135-01, 135-03 to 135-06

70

<55 - 69

N

136

R

19

136-01 to 136-04

70

<55

N

139

R

20

139-01 to 139-04

70

<55

N

140

R

20

140-01 to 140-04

70

<55

N

142

R

20

142-01, 142-03 to 142-06

70

<55 - 70

N

143

R

20

143-01, 143-03 to 143-06

70

<55 - 72

Y

146

R

21

146-01 to 146-04

70

<55

N

147

R

21

147-01, 147-03 to 147-06

70

<55 - 75

Y

149

R

21

149-01 to 149-04

70

<55

N

801

E

1

801-01

65

67

Y

Phase 1 to Phase 2

201

R

16

201-01 to 201-03

70

55 - 67

N

206

R

16

206-01

70

<55 - 64

N

211

R

17

211-01

70

56 - 70

N

212

R

17

212-01 to 212-02

70

<55 - 67

N

215

R

18

215-03

70

<55 - 62

N

501

E

7

501-01 to 501-05

65

<55 - 65

N

802

E

1

802-01 to 802-02

65

66 - 67

Y

Phase 1 to Phase 3

301

R

19

301-01

70

<55 - 66

N

303

R

19

303-01

70

55 - 67

N

304

R

19

304-01

70

<55 - 65

N

305

R

19

305-01

70

<55 - 66

N

307

R

20

307-01 to 307-04

70

<55 - 69

N

308

R

21

308-01

70

<55 - 63

N

309

R

22

309-01

70

<55 - 63

N

310

R

18

310-01

70

<55 - 66

N

311

R

18

311-01

70

<55 - 66

N

312

R

18

312-01

70

<55 - 66

N

601

E

7

601-01 to 601-09

65

<55 - 71

Y

803

E

1

803-01

65

<55

N

Phase 1 to Phase 4

401

R

21

401-01 to 401-04

70

<55

N

403

R

21

403-01 to 403-04

70

<55

N

404

R

22

404-01 to 404-04

70

<55 - 56

N

407

R

22

407-01 to 407-04

70

<55

N

408

R

20

408-02 to 408-18

70

55 - 73

Y

409

R

20

409-01 to 409-18

70

<55 - 72

Y

414

R

21

414-01

70

55 - 68

N

415

R

21

415-01 to 415-02

70

<55 - 69

N

419

R

21

419-01 to 419-13

70

<55 - 70

N

420

R

22

420-01 to 420-19

70

<55 - 71

Y

421

R

22

421-01 to 421-17

70

<55 - 74

Y

422

R

22

422-01 to 422-12

70

<55 - 75

Y

701

E

7

701-01 to 701-08

65

<55 - 73

Y

804

E

1

804-01

65

<55

N

Notes:   

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   R – Residential Premises, E – Educational Institutions

[3]   NAP – Noise Assessment Point

[4]   Bolded values mean exceedance of the relevant noise criteria.

4.4.3.5           From Table 4.14 and Appendix 4.14, the predicted noise levels at the following planned NSRs would exceed the respective noise criteria:

Table 4.14e Representative planned NSRs exceed respective criteria and require mitigation measures

ID[1]

Uses[2]

NAP[3]

103

R

103-01, 103-03 to 103-05

110

R

110-01, 110-03, 110-05

113

R

113-01, 113-03 to 113-05

143

R

143-01, 143-03, 143-05

147

R

147-01, 147-03, 147-05

408

R

408-04 to 408-11, 408-14 to 408-18

409

R

409-01 to 409-05, 409-07, 409-14 to 409-18

420

R

420-10 to 420-14

421

R

421-06 to 421-16

422

R

422-03 to 422-10, 422-12

601

E

601-03 to 601-04, 601-07 to 601-08

701

E

701-06 to 701-08

801

E

801-01

802

E

802-01 to 802-02

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   R – Residential Premises, E – Educational Institutions

[3]   NAP – Noise Assessment Point

4.4.3.6           The total number of dwellings, classrooms and other noise sensitive receivers that will be exposed to noise impact exceeding the criteria set in Annex 5 in the EIAO-TM has been calculated. It is predicted that a total of about, about 200 dwellings and 5 classrooms for Phase 1, about 200 dwellings and 15 classrooms for Phase 1 to Phase 2, about 200 dwellings and 35 classrooms for Phase 1 to Phase 3 and about 400 dwellings and 55 classrooms for Phase 1 to Phase 4 will expose to noise impact.

4.4.3.7           The direct mitigation measures are discussed in Section 4.4.4. With the implementation of all direct mitigation measures, all remaining planned NSRs would comply with the respective noise criteria.

4.4.4                  Mitigation of Road Traffic Noise Impact

Direct Mitigation Measures

4.4.4.1           As discussed in Section 4.4.3, mitigations measures are required for a number of planned NSRs. It should be noted that the design and layout of proposed residential development has proactively adopted self-protecting blocks for the first layer of residential blocks facing NLH to provide noise screening. This helps avoid traffic noise impacts from NLH as much as practicable at the outset. It has been demonstrated that the noise impacts can be mitigated to an acceptable level by employing a package of mitigation measures for road traffic noise including acoustic windows and arrangement of noise tolerant use in some buildings.

4.4.4.2           Provision of acoustic windows could provide up to 8 dB(A) noise attenuation according to EPD’s website. For conservative purpose, only 5 dB(A) noise attenuation provided by acoustic windows has been adopted in this EIA. Specially designed acoustic windows could be considered during detail design stage to aim at achieving 8 dB(A) noise attenuation.

4.4.4.3           A summary of proposed mitigation measures for road traffic noise is listed in Table 4.15. Figure 4.6 shows the extent and location of proposed mitigation measures for road traffic noise and rail noise.

Table 4.15 Locations of proposed mitigation measures for road traffic noise

Phase

NAP[1]

Type of Mitigation Measures[2]

Phase 1

103

Acoustic windows

110

Acoustic windows

113

Acoustic windows

143

Acoustic windows

147

Acoustic windows

801

Acoustic windows

Phase 2

802

Acoustic windows

Phase 3

601

Noise tolerant use[3]

Phase 4

408

Acoustic windows

409

Acoustic windows

420

Acoustic windows

421

Acoustic windows

422

Acoustic windows

701

Noise tolerant use[3]

Notes:

[1]       NAP – Noise Assessment Point

[2]       Details are shown in Figure 4.6.

[3]       Noise tolerant use is proposed to be arranged in the internal layout at the facade facing the NLH. Details are shown in Figure 4.6.

4.4.4.4           Results for mitigated case are shown in Table 4.16 and details could be found in Appendix 4.15. It can be seen that with the provision of the recommended mitigation measures, the traffic noise levels at all existing and planned NSRs will comply with the respective criterion.

Table 4.16a Predicted road traffic noise impact at existing and planned NSRs under mitigated scenario (Phase 1)

ID[1]

Uses[2]

No. of Domestic Storey

NAP[3]

Criteria, L10 (1hr) dB(A)

Noise Impact, L10 (1hr) dB(A)[4]

Mitigation Measures Required [Y/N]

Planned NSRs

Phase 1

101

R

17

101-01, 101-03 to 101-06

70

<55 - 67

N

103

R

18

103-01, 103-03 to 103-06

70

<55 - 70

N

104

R

18

104-01 to 104-04

70

<55

N

107

R

18

107-01, 107-03 to 107-06

70

<55 - 69

N

108

R

18

108-01, 108-03 to 108-06

70

<55 - 68

N

110

R

18

110-01, 110-03 to 110-06

70

<55 - 70

N

111

R

19

111-01 to 111-04

70

<55

N

113

R

19

113-01, 113-03 to 113-06

70

<55 - 70

N

114

R

19

114-01 to 114-04

70

<55

N

116

R

19

116-01 to 116-04

70

<55

N

117

R

19

117-01 to 117-04

70

<55

N

118

R

19

118-01 to 118-04

70

<55

N

119

R

15

119-01, 119-03 to 119-06

70

<55 - 63

N

122

R

16

122-01, 122-03 to 122-06

70

<55 - 69

N

123

R

16

123-01, 123-03 to 123-06

70

<55 - 69

N

125

R

16

125-01, 125-03 to 125-06

70

<55 - 64

N

126

R

16

126-01, 126-03 to 126-06

70

<55 - 70

N

129

R

16

129-01, 129-03 to 129-06

70

<55 - 67

N

130

R

17

130-01, 130-03 to 130-06

70

<55 - 65

N

132

R

17

132-01, 132-03 to 132-06

70

<55 - 69

N

133

R

17

133-01, 133-03 to 133-06

70

<55 - 70

N

135

R

17

135-01, 135-03 to 135-06

70

<55 - 69

N

136

R

19

136-01 to 136-04

70

<55

N

139

R

20

139-01 to 139-04

70

<55

N

140

R

20

140-01 to 140-04

70

<55

N

142

R

20

142-01, 142-03 to 142-06

70

<55 - 70

N

143

R

20

143-01, 143-03 to 143-06

70

57 - 67

N

146

R

21

146-01 to 146-04

70

<55

N

147

R

21

147-01, 147-03 to 147-06

70

<55 - 70

N

149

R

21

149-01 to 149-04

70

<55

N

801

E

1

801-01

65

62

N

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   R – Residential Premises, E – Educational Institutions

[3]   NAP – Noise Assessment Point

[4]   For the noise sensitive receivers with the application of acoustic windows, the predicted noise levels are the equivalent noise levels at 1m from the external facade after accounting the reduction in noise levels inside the flat offered by the propose acoustic window.

Table 4.16b Predicted road traffic noise impact at existing and planned NSRs under mitigated scenario (Phase 1 to Phase 2)

ID[1]

Uses[2]

No. of Domestic Storey

NAP[3]

Criteria, L10 (1hr) dB(A)

Noise Impact, L10 (1hr) dB(A)[4]

Mitigation Measures Required [Y/N]

Planned NSRs

Phase 1

101

R

17

101-01, 101-03 to 101-06

70

<55 - 67

N

103

R

18

103-01, 103-03 to 103-06

70

<55 - 70

N

104

R

18

104-01 to 104-04

70

<55

N

107

R

18

107-01, 107-03 to 107-06

70

<55 - 69

N

108

R

18

108-01, 108-03 to 108-06

70

<55 - 68

N

110

R

18

110-01, 110-03 to 110-06

70

<55 - 70

N

111

R

19

111-01 to 111-04

70

<55

N

113

R

19

113-01, 113-03 to 113-06

70

<55 - 70

N

114

R

19

114-01 to 114-04

70

<55

N

116

R

19

116-01 to 116-04

70

<55

N

117

R

19

117-01 to 117-04

70

<55

N

118

R

19

118-01 to 118-04

70

<55

N

119

R

15

119-01, 119-03 to 119-06

70

<55 - 63

N

122

R

16

122-01, 122-03 to 122-06

70

<55 - 69

N

123

R

16

123-01, 123-03 to 123-06

70

<55 - 69

N

125

R

16

125-01, 125-03 to 125-06

70

<55 - 64

N

126

R

16

126-01, 126-03 to 126-06

70

<55 - 70

N

129

R

16

129-01, 129-03 to 129-06

70

<55 - 67

N

130

R

17

130-01, 130-03 to 130-06

70

<55 - 65

N

132

R

17

132-01, 132-03 to 132-06

70

<55 - 69

N

133

R

17

133-01, 133-03 to 133-06

70

<55 - 70

N

135

R

17

135-01, 135-03 to 135-06

70

<55 - 69

N

136

R

19

136-01 to 136-04

70

<55

N

139

R

20

139-01 to 139-04

70

<55

N

140

R

20

140-01 to 140-04

70

<55

N

142

R

20

142-01, 142-03 to 142-06

70

<55 - 70

N

143

R

20

143-01, 143-03 to 143-06

70

57 - 67

N

146

R

21

146-01 to 146-04

70

<55

N

147

R

21

147-01, 147-03 to 147-06

70

<55 - 70

N

149

R

21

149-01 to 149-04

70

<55

N

801

E

1

801-01

65

62

N

Phase 1 to Phase 2

201

R

16

201-01 to 201-03

70

55 - 67

N

206

R

16

206-01

70

<55 - 64

N

211

R

17

211-01

70

56 - 70

N

212

R

17

212-01 to 212-02

70

<55 - 67

N

215

R

18

215-03

70

<55 - 63

N

501

E

7

501-01 to 501-05

65

<55 - 65

N

802

E

1

802-01 to 802-02

65

61 - 62

N

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   R – Residential Premises, E – Educational Institutions

[3]   NAP – Noise Assessment Point

[4]   For the noise sensitive receivers with the application of acoustic windows, the predicted noise levels are the equivalent noise levels at 1m from the external facade after accounting the reduction in noise levels inside the flat offered by the propose acoustic window.

 Table 4.16c Predicted road traffic noise impact at existing and planned NSRs under mitigated scenario (Phase 1 to Phase 3)

ID[1]

Uses[2]

No. of Domestic Storey

NAP[3]

Criteria, L10 (1hr) dB(A)

Noise Impact, L10 (1hr) dB(A)[4]

Mitigation Measures Required [Y/N]

Planned NSRs

Phase 1

101

R

17

101-01, 101-03 to 101-06

70

<55 - 67

N

103

R

18

103-01, 103-03 to 103-06

70

<55 - 70

N

104

R

18

104-01 to 104-04

70

<55

N

107

R

18

107-01, 107-03 to 107-06

70

<55 - 69

N

108

R

18

108-01, 108-03 to 108-06

70

<55 - 68

N

110

R

18

110-01, 110-03 to 110-06

70

<55 - 70

N

111

R

19

111-01 to 111-04

70

<55

N

113

R

19

113-01, 113-03 to 113-06

70

<55 - 70

N

114

R

19

114-01 to 114-04

70

<55

N

116

R

19

116-01 to 116-04

70

<55

N

117

R

19

117-01 to 117-04

70

<55

N

118

R

19

118-01 to 118-04

70

<55

N

119

R

15

119-01, 119-03 to 119-06

70

<55 - 63

N

122

R

16

122-01, 122-03 to 122-06

70

<55 - 69

N

123

R

16

123-01, 123-03 to 123-06

70

<55 - 69

N

125

R

16

125-01, 125-03 to 125-06

70

<55 - 64

N

126

R

16

126-01, 126-03 to 126-06

70

<55 - 70

N

129

R

16

129-01, 129-03 to 129-06

70

<55 - 67

N

130

R

17

130-01, 130-03 to 130-06

70

<55 - 65

N

132

R

17

132-01, 132-03 to 132-06

70

<55 - 69

N

133

R

17

133-01, 133-03 to 133-06

70

<55 - 70

N

135

R

17

135-01, 135-03 to 135-06

70

<55 - 69

N

136

R

19

136-01 to 136-04

70

<55

N

139

R

20

139-01 to 139-04

70

<55

N

140

R

20

140-01 to 140-04

70

<55

N

142

R

20

142-01, 142-03 to 142-06

70

<55 - 70

N

143

R

20

143-01, 143-03 to 143-06

70

57 - 67

N

146

R

21

146-01 to 146-04

70

<55

N

147

R

21

147-01, 147-03 to 147-06

70

<55 - 70

N

149

R

21

149-01 to 149-04

70

<55

N

801

E

1

801-01

65

62

N

Phase 1 to Phase 2

201

R

16

201-01 to 201-03

70

55 - 67

N

206

R

16

206-01

70

<55 - 64

N

211

R

17

211-01

70

56 - 70

N

212

R

17

212-01 to 212-02

70

<55 - 67

N

215

R

18

215-03

70

<55 - 62

N

501

E

7

501-01 to 501-05

65

<55 - 65

N

802

E

1

802-01 to 802-02

65

61 - 62

N

Phase 1 to Phase 3

301

R

19

301-01

70

<55 - 66

N

303

R

19

303-01

70

55 - 67

N

304

R

19

304-01

70

<55 - 65

N

305

R

19

305-01

70

<55 - 66

N

307

R

20

307-01 to 307-04

70

56 - 70

N

308

R

21

308-01

70

59 - 67

N

309

R

22

309-01

70

62 - 68

N

310

R

18

310-01

70

<55 - 66

N

311

R

18

311-01

70

<55 - 67

N

312

R

18

312-01

70

<55 - 66

N

601

E

7

601-01 to 601-09

65

<55 - 65

N

803

E

1

803-01

65

<55

N

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   R – Residential Premises, E – Educational Institutions

[3]   NAP – Noise Assessment Point

[4]   For the noise sensitive receivers with the application of acoustic windows, the predicted noise levels are the equivalent noise levels at 1m from the external facade after accounting the reduction in noise levels inside the flat offered by the propose acoustic window.

 Table 4.16d Predicted road traffic noise impact at existing and planned NSRs under mitigated scenario (full occupation after Phase 4)

ID[1]

Uses[2]

No. of Domestic Storey

NAP[3]

Criteria, L10 (1hr) dB(A)

Noise Impact, L10 (1hr) dB(A)[4]

Mitigation Measures Required [Y/N]

Planned NSRs

Phase 1

101

R

17

101-01, 101-03 to 101-06

70

<55 - 67

N

103

R

18

103-01, 103-03 to 103-06

70

<55 - 70

N

104

R

18

104-01 to 104-04

70

<55

N

107

R

18

107-01, 107-03 to 107-06

70

<55 - 69

N

108

R

18

108-01, 108-03 to 108-06

70

<55 - 68

N

110

R

18

110-01, 110-03 to 110-06

70

<55 - 70

N

111

R

19

111-01 to 111-04

70

<55

N

113

R

19

113-01, 113-03 to 113-06

70

<55 - 70

N

114

R

19

114-01 to 114-04

70

<55

N

116

R

19

116-01 to 116-04

70

<55

N

117

R

19

117-01 to 117-04

70

<55

N

118

R

19

118-01 to 118-04

70

<55

N

119

R

15

119-01, 119-03 to 119-06

70

<55 - 63

N

122

R

16

122-01, 122-03 to 122-06

70

<55 - 69

N

123

R

16

123-01, 123-03 to 123-06

70

<55 - 69

N

125

R

16

125-01, 125-03 to 125-06

70

<55 - 64

N

126

R

16

126-01, 126-03 to 126-06

70

<55 - 70

N

129

R

16

129-01, 129-03 to 129-06

70

<55 - 67

N

130

R

17

130-01, 130-03 to 130-06

70

<55 - 65

N

132

R

17

132-01, 132-03 to 132-06

70

<55 - 69

N

133

R

17

133-01, 133-03 to 133-06

70

<55 - 70

N

135

R

17

135-01, 135-03 to 135-06

70

<55 - 69

N

136

R

19

136-01 to 136-04

70

<55

N

139

R

20

139-01 to 139-04

70

<55

N

140

R

20

140-01 to 140-04

70

<55

N

142

R

20

142-01, 142-03 to 142-06

70

<55 - 70

N

143

R

20

143-01, 143-03 to 143-06

70

<55 - 67

N

146

R

21

146-01 to 146-04

70

<55

N

147

R

21

147-01, 147-03 to 147-06

70

<55 - 70

N

149

R

21

149-01 to 149-04

70

<55

N

801

E

1

801-01

65

62

N

Phase 1 to Phase 2

201

R

16

201-01 to 201-03

70

55 - 67

N

206

R

16

206-01

70

<55 - 64

N

211

R

17

211-01

70

56 - 70

N

212

R

17

212-01 to 212-02

70

<55 - 67

N

215

R

18

215-03

70

<55 - 62

N

501

E

7

501-01 to 501-05

65

<55 - 65

N

802

E

1

802-01 to 802-02

65

61 - 62

N

Phase 1 to Phase 3

301

R

19

301-01

70

<55 - 66

N

303

R

19

303-01

70

55 - 67

N

304

R

19

304-01

70

<55 - 65

N

305

R

19

305-01

70

<55 - 66

N

307

R

20

307-01 to 307-04

70

<55 - 69

N

308

R

21

308-01

70

<55 - 63

N

309

R

22

309-01

70

<55 - 63

N

310

R

18

310-01

70

<55 - 66

N

311

R

18

311-01

70

<55 - 66

N

312

R

18

312-01

70

<55 - 66

N

601

E

7

601-01 to 601-09

65

<55 - 65

N

803

E

1

803-01

65

<55

N

Phase 1 to Phase 4

401

R

21

401-01 to 401-04

70

<55

N

403

R

21

403-01 to 403-04

70

<55

N

404

R

22

404-01 to 404-04

70

<55 - 56

N

407

R

22

407-01 to 407-04

70

<55

N

408

R

20

408-02 to 408-18

70

<55 - 70

N

409

R

20

409-01 to 409-18

70

<55 - 70

N

414

R

21

414-01

70

55 - 68

N

415

R

21

415-01 to 415-02

70

<55 - 69

N

419

R

21

419-01 to 419-13

70

<55 - 70

N

420

R

22

420-01 to 420-19

70

<55 - 70

N

421

R

22

421-01 to 421-17

70

<55 - 69

N

422

R

22

422-01 to 422-12

70

<55 - 70

N

701

E

7

701-01 to 701-08

65

<55 - 64

N

804

E

1

804-01

65

<55

N

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   R – Residential Premises, E – Educational Institutions

[3]   NAP – Noise Assessment Point

[4]   For the noise sensitive receivers with the application of acoustic windows, the predicted noise levels are the equivalent noise levels at 1m from the external facade after accounting the reduction in noise levels inside the flat offered by the propose acoustic window.

4.4.4.5           With the implementation of mitigation measures, the total number of dwellings that will be benefitted and protected has been calculated. It is predicted that a total of about, about 200 dwellings and 5 classrooms for Phase 1, about 200 dwellings and 15 classrooms for Phase 1 to Phase 2, about 200 dwellings and 35 classrooms for Phase 1 to Phase 3 and about 400 dwellings and 55 classrooms for Phase 1 to Phase 4 will be benefitted and protected. There would be no dwellings and classrooms that will be exposed to noise impact exceeding the criteria set in Annex 5 in the EIAO-TM.

4.4.4.6           Table 4.15 has presented the packages of noise mitigation measures that are recommended for the current building design.  Nevertheless, depends on the evaluation during subsequent detailed design, the future developers may wish to explore any alternative approaches including but not limited to acoustic balconies, altering building forms, etc. to address road traffic noise issues as appropriate.  In such case, submission of a Noise Impact Assessment may be required under the planning/ land lease/ building plan or other statutory mechanism so as to demonstrate that the noise criteria can still be achieved by adopting their packages of mitigation measures.

Indirect Mitigation Measures

4.4.4.7           Since direct mitigation measures are sufficient to protect the dwellings to achieve compliance of relevant criteria, indirect mitigation measures are not required.

4.4.5                  Evaluation of Residual Road Traffic Noise Impact

4.4.5.1           According to Section 4.4.4, adverse residual road traffic noise impacts are not anticipated.

4.5                         Fixed Noise Sources Impact Assessment

4.5.1                  Fixed Noise Sources Impact Assessment Methodology

4.5.1.1           Fixed noise assessment has been conducted based on the following procedures:

·         Determine the assessment area;

·         Identify and locate representative NSRs that may be affected by the noise sources;

·         Determine the noise criteria for both daytime and night-time;

·         Use standard acoustic principle for attenuation and directivity;

·         Adopt correction of tonality, impulsiveness and intermittency as stipulated in IND-TM;

·         Calculate the noise impacts using assumed plant inventories and utilisation schedule, if available; and

·         Include cumulative impacts.

4.5.1.2           The assessment has been based on the best available information, which includes location of the planned fixed noise sources and their associated maximum sound power levels (SWLs).

4.5.2                  Identification of Fixed Noise Sources Impact

Identification of Assessment Area and Noise Sensitive Receivers

4.5.2.1           The assessment area is: i) 300m assessment area for planned NSRs affected by planned and existing fixed noise sources; ii) 300m assessment area for planned fixed noise sources. Agreement with the Director on the assessment area has been obtained prior to the commencement of the assessment.

4.5.2.2           For operational fixed noise assessment, representative NSRs locations have been selected from Table 4.8 and are summarised in Table 4.17 below. They are also illustrated in Figure 4.7. Agreement with the Director on noise assessment points has been obtained prior to the commencement of the assessment.

Table 4.17 Representative NSRs for fixed noise assessment

ID[1]

Uses[2]

No. of Domestic Storey

NAP[3]

ASR[4]

Existing NSR

N01

C

N/A[5]

N01-01

N/A[5]

Planned NSRs

Phase 1a/ 1b/ 1c

103

R

18

103-01

C

108

R

18

108-06

C

110

R

18

110-01

C

113

R

19

113-01

C

116

R

19

116-01

C

119

R

15

119-01

B

119

R

15

119-06

B

123

R

16

123-01

C

136

R

19

136-04

C

139

R

20

139-01

C

142

R

20

142-06

C

143

R

20

143-06

C

149

R

21

149-03

C

149

R

21

149-04

C

801

E

1

801-01

C

Phase 1a to 2

103

R

18

103-01

C

108

R

18

108-06

B

110

R

18

110-01

C

113

R

19

113-01

C

116

R

19

116-01

B

119

R

15

119-01

B

119

R

15

119-06

B

123

R

16

123-01

C

136

R

19

136-04

B

139

R

20

139-01

B

142

R

20

142-06

C

143

R

20

143-06

C

149

R

21

149-03

C

149

R

21

149-04

C

201

R

16

201-04

B

202

R

16

202-01

B

203

R

16

203-01

B

208

R

18

208-01

B

216

R

19

216-01

B

218

R

19

218-01

B

801

E

1

801-01

C

802

E

1

802-02

C

Phase 1a to 3

103

R

18

103-01

C

108

R

18

108-06

B

110

R

18

110-01

C

113

R

19

113-01

C

116

R

19

116-01

B

119

R

15

119-01

B

119

R

15

119-06

B

123

R

16

123-01

C

136

R

19

136-04

B

139

R

20

139-01

B

142

R

20

142-06

B

143

R

20

143-06

B

149

R

21

149-03

B

149

R

21

149-04

B

201

R

16

201-04

B

202

R

16

202-01

B

203

R

16

203-01

B

208

R

18

208-01

B

216

R

19

216-01

B

218

R

19

218-01

B

308

R

21

308-02

B

309

R

22

309-03

B

313

R

20

313-01

B

318

R

21

318-01

B

801

E

1

801-01

C

802

E

1

802-02

C

Phase 1a to 4

103

R

18

103-01

C

108

R

18

108-06

B

110

R

18

110-01

C

113

R

19

113-01

C

116

R

19

116-01

B

119

R

15

119-01

B

119

R

15

119-06

B

123

R

16

123-01

C

136

R

19

136-04

B

139

R

20

139-01

B

142

R

20

142-06

B

143

R

20

143-06

B

149

R

21

149-03

B

149

R

21

149-04

B

201

R

16

201-04

B

202

R

16

202-01

B

203

R

16

203-01

B

208

R

18

208-01

B

216

R

19

216-01

B

218

R

19

218-01

B

308

R

21

308-02

B

309

R

22

309-03

B

313

R

20

313-01

B

318

R

21

318-01

B

407

R

22

407-01

B

411

R

22

411-01

B

413

R

22

413-01

B

417

R

21

417-01

B

419

R

21

419-14

B

421

R

22

421-18

B

422

R

22

422-07

C

801

E

1

801-01

C

802

E

1

802-02

C

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   R – Residential Premises, C – Country Parks, E – Educational Institutions.

[3]   NAP – Noise Assessment Point.

[4]   Details on the determination of Area Sensitivity Rating are shown in Appendix 4.1b.

[5]   N/A – Not Applicable, In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR.  However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

 

4.5.2.3           Prevailing noise measurements have been conducted for determination of the fixed noise criteria for planned fixed noise sources as shown in Table 4.17a below.  Details refer to Section 4.2.4 above.

Table 4.17a Noise criteria for fixed noise assessment

NAP

Time Period

ASR

ANL-5, dB(A) [A]

BNL[1], dB(A) [B]

Reference NM[2]

Criteria, dB(A) Min. of [A] & [B]

Phase 1a/ 1b/ 1c

103-01

Day & Evening

C

65

71

M03

65

Night

55

64

55

108-06

Day & Evening

C

65

71

M03

65

Night

55

64

55

110-01

Day & Evening

C

65

71

M03

65

Night

55

64

55

113-01

Day & Evening

C

65

71

M03

65

Night

55

64

55

116-01

Day & Evening

C

65

71

M03

65

Night

55

64

55

119-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

119-06

Day & Evening

B

60

61

M01

60

Night

50

59

50

123-01

Day & Evening

C

65

71

M03

65

Night

55

64

55

136-04

Day & Evening

C

65

71

M03

65

Night

55

64

55

139-01

Day & Evening

C

65

71

M03

65

Night

55

64

55

142-06

Day & Evening

C

65

71

M03

65

Night

55

64

55

143-06

Day & Evening

C

65

71

M03

65

Night

55

64

55

149-03

Day & Evening

C

65

71

M03

65

Night

55

64

55

149-04

Day & Evening

C

65

71

M03

65

Night

55

64

55

801-01

Day & Evening

C

65

71

M03

65

Night

55

64

55

Phase 1a to 2

103-01

Day & Evening

C

65

71

M03

65

Night

55

64

55

108-06

Day & Evening

B

60

71

M03

60

Night

50

64

50

110-01

Day & Evening

C

65

71

M03

65

Night

55

64

55

113-01

Day & Evening

C

65

71

M03

65

Night

55

64

55

116-01

Day & Evening

B

60

71

M03

60

Night

50

64

50

119-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

119-06

Day & Evening

B

60

61

M01

60

Night

50

59

50

123-01

Day & Evening

C

65

71

M03

65

Night

55

64

55

136-04

Day & Evening

B

60

71

M03

60

Night

50

64

50

139-01

Day & Evening

B

60

71

M03

60

Night

50

64

50

142-06

Day & Evening

C

65

71

M03

65

Night

55

64

55

143-06

Day & Evening

C

65

71

M03

65

Night

55

64

55

149-03

Day & Evening

C

65

71

M03

65

Night

55

64

55

149-04

Day & Evening

C

65

71

M03

65

Night

55

64

55

201-04

Day & Evening

B

60

61

M01

60

Night

50

59

50

202-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

203-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

208-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

216-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

218-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

801-01

Day & Evening

C

65

71

M03

65

Night

55

64

55

802-02

Day & Evening

C

65

71

M03

65

Night

55

64

55

Phase 1a to 3

103-01

Day & Evening

C

65

71

M03

65

Night

55

64

55

108-06

Day & Evening

B

60

71

M03

60

Night

50

64

50

110-01

Day & Evening

C

65

71

M03

65

Night

55

64

55

113-01

Day & Evening

C

65

71

M03

65

Night

55

64

55

116-01

Day & Evening

B

60

71

M03

60

Night

50

64

50

119-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

119-06

Day & Evening

B

60

61

M01

60

Night

50

59

50

123-01

Day & Evening

C

65

71

M03

65

Night

55

64

55

136-04

Day & Evening

B

60

71

M03

60

Night

50

64

50

139-01

Day & Evening

B

60

71

M03

60

Night

50

64

50

142-06

Day & Evening

B

60

71

M03

60

Night

50

64

50

143-06

Day & Evening

B

60

71

M03

60

Night

50

64

50

149-03

Day & Evening

B

60

71

M03

60

Night

50

64

50

149-04

Day & Evening

B

60

71

M03

60

Night

50

64

50

201-04

Day & Evening

B

60

61

M01

60

Night

50

59

50

202-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

203-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

208-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

216-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

218-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

308-02

Day & Evening

B

60

61

M01

60

Night

50

59

50

309-03

Day & Evening

B

60

61

M01

60

Night

50

59

50

313-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

318-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

801-01

Day & Evening

C

65

71

M03

65

Night

55

64

55

802-02

Day & Evening

C

65

71

M03

65

Night

55

64

55

Phase 1a to 4

103-01

Day & Evening

C

65

71

M03

65

Night

55

64

55

108-06

Day & Evening

B

60

71

M03

60

Night

50

64

50

110-01

Day & Evening

C

65

71

M03

65

Night

55

64

55

113-01

Day & Evening

C

65

71

M03

65

Night

55

64

55

116-01

Day & Evening

B

60

71

M03

60

Night

50

64

50

119-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

119-06

Day & Evening

B

60

61

M01

60

Night

50

59

50

123-01

Day & Evening

C

65

71

M03

65

Night

55

64

55

136-04

Day & Evening

C

65

71

M03

65

Night

55

64

55

139-01

Day & Evening

B

60

71

M03

60

Night

50

64

50

142-06

Day & Evening

B

60

71

M03

60

Night

50

64

50

143-06

Day & Evening

B

60

71

M03

60

Night

50

64

50

149-03

Day & Evening

B

60

71

M03

60

Night

50

64

50

149-04

Day & Evening

B

60

71

M03

60

Night

50

64

50

201-04

Day & Evening

B

60

61

M01

60

Night

50

59

50

202-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

203-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

208-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

216-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

218-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

308-02

Day & Evening

B

60

61

M01

60

Night

50

59

50

309-03

Day & Evening

B

60

61

M01

60

Night

50

59

50

313-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

318-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

407-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

411-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

413-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

417-01

Day & Evening

B

60

61

M01

60

Night

50

59

50

419-14

Day & Evening

B

60

61

M01

60

Night

50

59

50

421-18

Day & Evening

B

60

61

M01

60

Night

50

59

50

422-07

Day & Evening

C

65

71

M03

65

Night

55

64

55

801-01

Day & Evening

C

65

71

M03

65

Night

55

64

55

802-02

Day & Evening

C

65

71

M03

65

Night

55

64

55

Notes:

[1]   Prevailing background noise level.

[2]   Prevailing noise measurement location.

Inventory of Noise Sources

4.5.2.4           Key existing and planned noise sources have been discussed in Section 4.2.3. A summary of the fixed noise source affecting the project area is given below and illustrated in Figure 4.1. The inventory of noise source has been confirmed with the Project Proponent.

Existing Fixed Noise Sources

·         SHD (e.g. ventilation louver at existing depot, rail grinding activity, train washing activity, repairing workshops).

Planned Fixed Noise Sources

·         SPS;

·         PTI;

·         Ventilation louvers at podium;

·         Reprovisioned SHD (e.g. fixed plants including ventilation louvers); and

·         SHO (i.e. ventilation louvers).

4.5.3                  Prediction and Evaluation of Fixed Noise Sources Impact

Scenarios

4.5.3.1           The fixed noise impact assessment of unmitigated scenario and mitigated scenario of worst operation mode representing the maximum noise emission is conducted with respect to the criteria set in Annex 5 of the TM. Validity of the operation modes have been confirmed with the Project Proponent. Agreement with the Director on the operation modes has been obtained prior to the commencement of the assessment.

Prediction of Noise Impact

Existing SHD

4.5.3.2           While potential fixed noise impacts from the existing SHD (e.g. ventilation louver at existing depot, rail grinding activity, train washing activity, repairing workshops) during depot replanning will be addressed the Railway EIA, which would be submitted separately for approval under EIAO, fixed noise impacts have therefore been addressed in this EIA report as well.

SPS/ PTI/ Ventilation Louvers at Podium

4.5.3.3           Sewage from the proposed development will be delivered to SHWSTW for further processing with utilities connecting to existing SHWSTW. Sewage pumping stations within each phase will be fully enclosed within podium with exhaust / intake louvers. In addition, one ultimate sewage pumping station will be located at northeast of the proposed development.  It will be open air until the completion of Phase 4 construction.  By the end of Phase 4 construction, it will be fully enclosed structure with exhaust / intake louvers. Potential construction and fixed noise impacts have therefore been addressed in this EIA report.

4.5.3.4           A PTI is proposed to satisfy the transport demand for future development(s) in the surrounding area. Key noise generating sources inside PTI usually include ventilation fans, idling engine and manoeuvring vehicles, etc. However, the PTI would be enclosed within the proposed podium underneath the proposed development, and the location of ingress and egress is designed with no-line-of-sight at the noise sensitive use. However, the potential fixed noise impacts from ventilation fans have therefore been addressed in this EIA report.

4.5.3.5           Commercial uses, kindergartens and utility plant rooms will be enclosed inside podium. Mechanical plant such as chillers and pumps will be located inside plant rooms of podium and hence mechanical ventilation is required. The potential construction and fixed noise impacts from the ventilation louvers have therefore been addressed in this EIA report.

4.5.3.6           The potential fixed noise impacts from the SPS, exhaust/ intake louvers as well as other fixed plant within the site boundary have been included in this assessment. Analysis has been conducted based on the best available information on the location of the planned fixed noise sources and their associated maximum allowable SWLs. The table below shows the maximum allowable SWL. The locations of the planned noise sources are shown in Figure 4.7b.

Table 4.18 Summary of maximum allowable SWL for the SPS and louvers, within the site boundary

Plant Item

Maximum Allowable SWL[1], dB(A)

Louvers

92/82

SPS

102/92

Notes:

[1]   The maximum allowable SWL are presented for [Daytime maximum allowable SWL/ Nighttime maximum allowable SWL].

4.5.3.7           Based on site observation for the existing noise sources (i.e. louver) inside SHD, intermittency and impulsiveness are not expected at near field.  Consider the nature / function of planned louvers for topside development, corrections of intermittency and impulsiveness are not applied in current fixed noise assessment.  However, tonality is observed at near field but not at far field.  A 3dB(A) tonality correction have therefore been applied in the noise analysis for conservative purpose.  In addition, a 3dB(A) facade correction has also been applied in the noise analysis for conservative purpose.

4.5.3.8           In the case that the noise sources falls within the view angle of the NSR but with no direct line of sight to the noise source to the location of noise source under the NSR or the noise source is below the transfer plate slab of the planned NSRs, a 10dB(A) barrier attenuation has been applied in the calculation.  The barrier attenuation has been estimated based on worst case scenario and frequency of noise sources of concern obtained through on-site measurement inside SHD.  In addition, the barrier attenuation has been estimated based on ISO 9613 Acoustics – Attenuation of sound during propagation outdoors – Part 2: General method of calculation. Section drawing is provided in Appendix 4.16. Given that estimated barrier attenuation is higher than 10dB(A), 10dB(A) barrier attenuation has been adopted for conservative purpose.

4.5.3.9           Typically, a noise reduction of 10dB(A) and 20dB(A) is possible with the application of silencer installation and special acoustic enclosure at various units. These predicted maximum allowable SWL are in similar range as those predicted in other EIA report (e.g. Approved EIA reports for TCNTE (AEIAR-196/2016) and North East New Territories New Development Areas (AEIAR-175/2013)).

4.5.3.10      The Contractor shall install acoustic silencers, noise barrier or acoustic enclosure as appropriate to ensure the specified maximum SWLs as shown in Table 4.18 will not be exceeded. The Contractor shall also take into account the latest available information at time of detail design to review and update the maximum allowable SWL as appropriate.

SHD Replanning Works and Reprovisioned SHD

4.5.3.11      While potential fixed noise impacts (e.g. fixed plants including ventilation louvers which will be operated above the concrete podium) will be addressed in the Railway EIA, which would be submitted separately for approval under EIAO, fixed noise impacts have therefore been addressed in this EIA report as well. The locations of the planned and existing noise sources are shown in Figure 4.7b. The maximum allowable SWL for the planned louvers is summarised in Table 4.18a.

Table 4.18a Summary of maximum allowable SWL for the planned ventilation louvers for the SHO and Reprovisioned SHD

Louver Item[1]

Maximum Allowable SWL[2], dB(A)

LV-1

80/75

LV-2

LV-3

75/75

LV-4

75/80

LV-5

80/80

LV-6

85/80

LV-7

90/80

LV-8

LV-9

LV-10

LV-11

LV-12

LV-13

LV-14

LV-15

LV-16

LV-17

LV-18

100/90

LV-19

LV-20

LV-21

95/85

LV-22

LV-23

LV-24

90/80

LV-25

LV-26

LV-27

85/75

LV-28

LV-29

90/80

LV-30

110/100

LV-31

105/95

LV-32

100/90

LV-33

LV-34

LV-35

LV-36

95/85

LV-37

LV-38

LV-39

LV-40

LV-41

100/90

LV-42

95/85

LV-43

LV-44

LV-45

LV-46

LV-47

LV-48

LV-49

LV-50

100/90

LV-51

LV-52

LV-53

LV-54

LV-55

LV-56

LV-57

LV-58

105/95

LV-59

LV-60

LV-61

90/80

LV-62

85/75

LV-63

90/80

LV-64

LV-65

95/85

LV-66

LV-67

90/80

LV-68

LV-69

LV-70

LV-71

100/90

LV-72

CWP Room

100/100

Cooling Tower Plant

102/105

Notes:

[1]   Location of planned louvers are extracted from the Railway EIA (ESB-296/2016).

[2]   The maximum allowable SWLs are presented for Daytime maximum allowable SWL/ Nighttime maximum allowable SWL which are extracted from the Railway EIA (ESB-296/2016).

SHO

4.5.3.12      While potential fixed noise impacts (e.g. fixed plants including ventilation louvers which will be operated above the concrete podium) will be addressed in the Railway EIA, which would be submitted separately for approval under EIAO, fixed noise impacts have therefore been addressed in this EIA report as well.

Cumulative Fixed Noise Impact

4.5.3.13      Detailed cumulative fixed noise calculation is shown in Appendix 4.17 and summary of the cumulative impacts are given in Table 4.19.

Table 4.19 Predicted fixed noise impact at existing and planned NSRs

ID[1]

NAP[2]

ASR

Planned Noise Source Only

Existing + Planned Noise Source

Max. Predicted Sound Pressure Level, dB(A)

Daytime & Evening/

Night-time Criteria Leq 30 min dB(A) [3]

Compliance [Y/N]

Max. Predicted Sound Pressure Level, dB(A)

Daytime & Evening/

Night-time Criteria Leq 30 min dB(A) [3]

Compliance [Y/N]

Existing NSR

N01

N01-01

N/A[4]

59/49[5]

N/A[4]

-

59/49[5]

N/A[4]

-

Planned NSRs

Phase 1a/1b/1c

103

103-01

C

61/51

65/55

Y

61/51

70/60

Y

108

108-06

C

57/47

65/55

Y

57/48

70/60

Y

110

110-01

C

57/47

65/55

Y

57/47

70/60

Y

113

113-01

C

57/47

65/55

Y

57/48

70/60

Y

116

116-01

C

56/46

65/55

Y

56/47

70/60

Y

119

119-01

B

57/49

60/50

Y

57/50

65/55

Y

119

119-06

B

57/48

60/50

Y

57/49

65/55

Y

123

123-01

C

61/51

65/55

Y

61/51

70/60

Y

136

136-04

C

57/48

65/55

Y

57/49

70/60

Y

139

139-01

C

59/49

65/55

Y

60/50

70/60

Y

142

142-06

C

58/50

65/55

Y

59/51

70/60

Y

143

143-06

C

58/52

65/55

Y

61/53

70/60

Y

149

149-03

C

58/49

65/55

Y

63/55

70/60

Y

149

149-04

C

56/47

65/55

Y

63/54

70/60

Y

801

801-01

C

61/-[6]

65/55

Y

62/-[6]

70/60

Y

Phase 1a to 2

103

103-01

C

61/51

65/55

Y

61/51

70/60

Y

108

108-06

B

57/47

60/50

Y

57/47

65/55

Y

110

110-01

C

57/47

65/55

Y

57/47

70/60

Y

113

113-01

C

57/47

65/55

Y

57/47

70/60

Y

116

116-01

B

56/46

60/50

Y

56/46

65/55

Y

119

119-01

B

57/50

60/50

Y

57/50

65/55

Y

119

119-06

B

57/49

60/50

Y

57/49

65/55

Y

123

123-01

C

61/51

65/55

Y

61/51

70/60

Y

136

136-04

B

57/47

60/50

Y

57/47

65/55

Y

139

139-01

B

59/49

60/50

Y

59/49

65/55

Y

142

142-06

C

58/48

65/55

Y

59/49

70/60

Y

143

143-06

C

57/47

65/55

Y

61/49

70/60

Y

149

149-03

C

58/48

65/55

Y

63/50

70/60

Y

149

149-04

C

56/46

65/55

Y

63/49

70/60

Y

201

201-04

B

57/48

60/50

Y

57/48

65/55

Y

202

202-01

B

58/48

60/50

Y

58/49

65/55

Y

203

203-01

B

58/48

60/50

Y

58/48

65/55

Y

208

208-01

B

57/47

60/50

Y

57/47

65/55

Y

216

216-01

B

57/47

60/50

Y

57/47

65/55

Y

218

218-01

B

54/46

60/50

Y

54/46

65/55

Y

801

801-01

C

61/-[6]

65/55

Y

63/-[6]

70/60

Y

802

802-02

C

59/-[6]

65/55

Y

59/-[6]

70/60

Y

Phase 1a to 3

103

103-01

C

61/51

65/55

Y

61/51

70/60

Y

108

108-06

B

57/47

60/50

Y

57/47

65/55

Y

110

110-01

C

57/47

65/55

Y

57/47

70/60

Y

113

113-01

C

57/47

65/55

Y

57/47

70/60

Y

116

116-01

B

56/46

60/50

Y

56/46

65/55

Y

119

119-01

B

57/50

60/50

Y

57/50

65/55

Y

119

119-06

B

57/49

60/50

Y

57/49

65/55

Y

123

123-01

C

61/51

65/55

Y

61/51

70/60

Y

136

136-04

B

57/47

60/50

Y

57/47

65/55

Y

139

139-01

B

59/49

60/50

Y

59/49

65/55

Y

142

142-06

B

58/48

60/50

Y

58/48

65/55

Y

143

143-06

B

57/47

60/50

Y

57/47

65/55

Y

149

149-03

B

58/48

60/50

Y

58/48

65/55

Y

149

149-04

B

56/46

60/50

Y

56/46

65/55

Y

201

201-04

B

57/48

60/50

Y

57/48

65/55

Y

202

202-01

B

58/48

60/50

Y

58/49

65/55

Y

203

203-01

B

58/48

60/50

Y

58/48

65/55

Y

208

208-01

B

57/47

60/50

Y

57/47

65/55

Y

216

216-01

B

57/48

60/50

Y

57/48

65/55

Y

218

218-01

B

56/48

60/50

Y

56/48

65/55

Y

308

308-02

B

58/48

60/50

Y

58/48

65/55

Y

309

309-03

B

55/46

60/50

Y

55/46

65/55

Y

313

313-01

B

59/50

60/50

Y

59/50

65/55

Y

318

318-01

B

59/50

60/50

Y

59/50

65/55

Y

801

801-01

C

61/-[6]

65/55

Y

63/-[6]

70/60

Y

802

802-02

C

59/-[6]

65/55

Y

59/-[6]

70/60

Y

Phase 1a to 4

103

103-01

C

61/51

65/55

Y

61/51

70/60

Y

108

108-06

B

57/47

60/50

Y

57/47

65/55

Y

110

110-01

C

57/47

65/55

Y

57/47

70/60

Y

113

113-01

C

57/47

65/55

Y

57/47

70/60

Y

116

116-01

B

56/46

60/50

Y

56/46

65/55

Y

119

119-01

B

57/50

60/50

Y

57/50

65/55

Y

119

119-06

B

57/49

60/50

Y

57/49

65/55

Y

123

123-01

C

61/51

65/55

Y

61/51

70/60

Y

136

136-04

B

57/47

60/50

Y

57/47

65/55

Y

139

139-01

B

59/49

60/50

Y

59/49

65/55

Y

142

142-06

B

58/48

60/50

Y

58/48

65/55

Y

143

143-06

B

57/47

60/50

Y

57/47

65/55

Y

149

149-03

B

57/47

60/50

Y

57/47

65/55

Y

149

149-04

B

55/45

60/50

Y

55/45

65/55

Y

201

201-04

B

57/48

60/50

Y

57/48

65/55

Y

202

202-01

B

58/48

60/50

Y

58/49

65/55

Y

203

203-01

B

58/48

60/50

Y

58/48

65/55

Y

208

208-01

B

57/47

60/50

Y

57/47

65/55

Y

216

216-01

B

57/48

60/50

Y

57/48

65/55

Y

218

218-01

B

56/48

60/50

Y

56/48

65/55

Y

308

308-02

B

58/49

60/50

Y

58/49

65/55

Y

309

309-03

B

56/46

60/50

Y

56/46

65/55

Y

313

313-01

B

59/50

60/50

Y

59/50

65/55

Y

318

318-01

B

59/50

60/50

Y

59/50

65/55

Y

407

407-01

B

53/43

60/50

Y

53/44

65/55

Y

411

411-01

B

58/48

60/50

Y

58/48

65/55

Y

413

413-01

B

58/48

60/50

Y

58/48

65/55

Y

417

417-01

B

58/48

60/50

Y

58/48

65/55

Y

419

419-14

B

58/48

60/50

Y

58/48

65/55

Y

421

421-18

B

59/49

60/50

Y

59/49

65/55

Y

422

422-07

C

58/48

65/55

Y

58/48

70/60

Y

801

801-01

C

61/-[6]

65/55

Y

63/-[6]

70/60

Y

802

802-02

C

59/-[6]

65/55

Y

59/-[6]

70/60

Y

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   NAP – Noise Assessment Point.

[3]   The criteria are presented for [Daytime and evening time criterion / night-time criterion]. Noise criterion is proposed based on ANL-5 for planned fixed noise impacts and ANL for cumulative fixed noise impacts.

[4]   N/A – Not Applicable. In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR. However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

[5]   Shortest horizontal distances among N01-01 and the noise sources have been used to calculate the predicted sound pressure level.

[6]   Only day-time operation for the kindergarten.

4.5.3.14      As shown in the table above, the cumulative fixed noise impacts are within the respective noise criterion. The fixed noise impact at Country Park (N01) is anticipated to be about 59dB(A).  Given the transient nature of visitor using hiking trails, adverse noise impact is not anticipated.

4.5.4                  Mitigation of Fixed Noise Sources Impact

4.5.4.1           For the proposed noise sources which are located near to existing and planned NSRs, the following tentative noise mitigation measures are considered:

·         Mechanical plants should be enclosure inside a building structure;

·         Proper selection of quiet plant aiming to reduce the tonality at NSRs;

·         Installation of silencer/ acoustic enclosure/ acoustic louver for the exhaust of ventilation system;

·         Openings of ventilation systems should be located away from NSRs as far as practicable.

4.5.4.2           The feasibility, practicability, programming and effectiveness of the above mitigation measures have been reviewed by engineer. As the fixed noise impacts for planned and existing NSRs will be within respective noise criteria, there would be no dwellings, classrooms and other sensitive receivers that will be exposed to noise impact exceeding the criteria set in Annex 5 in the EIAO-TM.

4.5.4.3           Fixed glazing could be considered as specially provided glazing under NCO in the later detail design stage. When fixed/rail noise is transmitted to the NSR primarily through specially provided glazing at the facade of the building as considered appropriate for reducing the noise, and the assessment point is a particular internal location considered appropriate having regard to the normal occupancy of the building, the proposed fixed glazing will be provided with sufficient noise insulation performance to meet NCO TM requirement.

4.5.5                  Structural-borne Fixed Noise Impact

4.5.5.1           Relevant mitigation measures for structural-borne fixed plant noise would be installed with reference to Good Practices on Ventilation System Noise Control to reduce structural-borne noise impact. Therefore, structural-borne fixed noise impact from the reprovisioned SHD affecting the SHD Topside Development is not anticipated.

4.5.6                  Evaluation of Residual Fixed Noise Sources Impact

4.5.6.1           With the implementation of suitable mitigation measures, fixed noise impacts are not expected. Adverse residual noise impacts are therefore not anticipated. There would be no existing dwellings, classrooms and other noise sensitive elements that will be exposed to adverse residual noise impact exceeding the criteria set in Annex 5 in the EIAO-TM.

4.6                         Aircraft Noise Impact Assessment

4.6.1                  Aircraft Noise Impact Assessment Methodology

4.6.1.1           According to the approved 3RS EIA (AEIAR-185/2014), the NEF noise contours assessment at year 2021 (interim phase), 2030 (worst operation mode) and 2032 (full operation mode) have been predicted. The NEFs as published from the approved 3RS EIA are shown in Figure 4.2b to Figure 4.2d. The NEF results in the above EIA are referenced for the consideration of aircraft noise impact at the proposed development. Agreement with the Director on the methodology has been obtained prior to the commencement of the assessment.

4.6.2                  Identification of Aircraft Noise Impact

Identification of Assessment Area and Noise Sensitive Receivers

4.6.2.1           For operational aircraft noise assessment, the assessment area includes all planned NSRs of the Project. Representative NSR locations have been selected from Table 4.20 and summarised in the table below. They are also illustrated in Figure 4.8. Agreement with the Director on the assessment area and noise assessment points has been obtained prior to the commencement of the assessment.

Table 4.20 Representative NSRs for aircraft noise assessment

ID[1]

Uses[2]

No. of Domestic Storey

NAP[3]

Planned NSRs

119

R

15

119-01

201

R

16

201-03

217

R

19

217-01

309

R

22

309-03

315

R

20

315-01

410

R

22

410-01

422

R

22

422-07

802

E

1

802-02

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   R – Residential Premises, E – Educational Institutions

[3]   NAP – Noise Assessment Point.

4.6.3                  Prediction and Evaluation of Aircraft Noise Impact

4.6.3.1           As mentioned in Section 4.1.3.7, NSRs relying on opened windows for ventilation should be planned beyond the NEF25 contour, except for offices which should be beyond the NEF30 contour.

4.6.3.2           Based on the NEF results from the approved EIA report for Expansion of Hong Kong International Airport into a Three-Runway System (AEIAR-185/2014), the validity of the assumptions, input data, and operation modes have been confirmed with CAD as stipulated under paragraph 7.3.3.30 in the approved EIA report. The predicted NEF 25 contours of the 3RS will be away from site boundary in Year 2011 (~260m), Year 2021(~280m), Year 2030 (~1,000m) and Year 2032 (~1,000m). It is noted that the population intake of Phase 1 will be at Year 2026 – Year 2027, and the separation distance from the predicted NEF 25 contours will be about ~280m from the site boundary and 440m from Phase 1 development. In addition, the population intake of Phase 2, Phase 3 and Phase 4 will be at Year 2030, Year 2034 and Year 2035 – Year 2038 respectively, the separation distance from the predicted NEF 25 contours will be about 1,000m.

4.6.4                  Mitigation of Aircraft Noise Impact

Direct Mitigation Measures

4.6.4.1           According to 3RS EIA findings, the predicted NEF 25 contours of the 3RS would be away from the proposed development upon the full commissioning of the 3RS. Hence, direct mitigation measures are not required.

Indirect Mitigation Measures

4.6.4.2           According to 3RS EIA findings, the predicted NEF 25 contours of the 3RS would be away from the proposed development upon the full commissioning of the 3RS. Hence, indirect mitigation measures are not required. Although not under the statutory requirements, the use of acoustic insulation in form of well-gasketted window to enhance the indoor living environment would be reviewed in the detailed design stage, as mentioned in Section 2.4.3.13 of this report.

4.6.5                  Evaluation of Residual Aircraft Noise Impact

4.6.5.1           Adverse aircraft noise impacts are not expected therefore residual noise impacts are not anticipated.

4.7                         Rail Noise Assessment

4.7.1                  Rail Noise Impact Assessment Methodology

4.7.1.1           Rail noise impact has been predicted according to “Calculation of Railway Noise (1995)” by the UK Department of Transport. Correction factors and operation details adopted in the rail noise assessment have been made reference to Railway EIA. Agreement with the Director on the methodology and computational model have been obtained prior to the commencement of the assessment.

4.7.1.2           The assessment area for rail noise impact assessment includes those within 300m from the site boundary.

4.7.2                  Identification of Rail Noise Impact

Identification of Assessment Area and Noise Sensitive Receivers

4.7.2.1           For operational rail noise assessment, the assessment area includes those within 300m from site boundary. Representative NSRs locations have been selected from Table 4.8 and are summarised in the table below and illustrated in Figure 4.9. Agreement with the Director on the assessment area and noise assessment points has been obtained prior to the commencement of the assessment.

Table 4.25a Representative NSRs for rail noise assessment (Phase 1a population intake after Year 2026)

ID[1]

Uses[2]

No. of Domestic Storey

NAP[3]

ASR[4]

Daytime & Evening/

Night-time Criteria Leq 30 min dB(A)[5]

Criteria Lmax dB(A)[6]

Existing NSRs

N01

C

N/A[7]

N01-01

N/A[7]

N/A[7]

N/A[7]

Planned NSRs

Phase 1a

101

R

17

101-01, 101-03 to 101-06

C

70/60

85

103

R

18

103-01, 103-03 to 103-05

C

70/60

85

R

18

103-06

B

65/55

85

104

R

18

104-01 to 104-03

B

65/55

85

R

18

104-04

C

70/60

85

107

R

18

107-01, 107-03 to 107-06

C

70/60

85

108

R

18

108-01, 108-03 to 108-06

C

70/60

85

110

R

18

110-01, 110-03 to 110-06

C

70/60

85

111

R

19

111-01 to 111-04

C

70/60

85

113

R

19

113-01, 113-03 to 113-06

C

70/60

85

114

R

19

114-01 to 114-04

C

70/60

85

116

R

19

116-01 to 116-04

C

70/60

85

117

R

19

117-01 to 117-04

C

70/60

85

118

R

19

118-01 to 118-04

C

70/60

85

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   R – Residential Premises, E – Educational Institutions, C – Country Parks

[3]   NAP – Noise Assessment Point

[4]   Details on the determination of Area Sensitivity Rating are shown in Appendix 4.1b.

[5]   The criteria are presented for [Daytime and evening time criterion / night-time criterion]. Noise criterion is proposed according to IND-TM.

[6]   Noise criterion between 2300 – 0700 hours according to EIAO-TM.

[7]   N/A – Not Applicable, In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR. However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

Table 4.25b Representative NSRs for rail noise assessment (Phase 1a to Phase 1b population intake after Year 2026)

ID[1]

Uses[2]

No. of Domestic Storey

NAP[3]

ASR[4]

Daytime & Evening/

Night-time Criteria Leq 30 min dB(A)[5]

Criteria Lmax dB(A)[6]

Existing NSRs

N01

C

N/A[7]

N01-01

N/A[7]

N/A[7]

N/A[7]

Planned NSRs

Phase 1a

101

R

17

101-01, 101-03, 101-05

C

70/60

85

R

17

101-04 and 101-06

B

65/55

85

103

R

18

103-01, 103-03 to 103-05

C

70/60

85

R

18

103-06

B

65/55

85

104

R

18

104-01 to 104-03

B

65/55

85

R

18

104-04

C

70/60

85

107

R

18

107-01, 107-03 to 107-06

C

70/60

85

108

R

18

108-01, 108-03 to 108-06

C

70/60

85

110

R

18

110-01, 110-03 to 110-06

C

70/60

85

111

R

19

111-01 to 111-04

C

70/60

85

113

R

19

113-01, 113-03 to 113-06

C

70/60

85

114

R

19

114-01 to 114-04

C

70/60

85

116

R

19

116-01 to 116-04

C

70/60

85

117

R

19

117-01 to 117-04

C

70/60

85

118

R

19

118-01 to 118-04

C

70/60

85

Phase 1a to Phase 1b

119

R

15

119-01, 119-03 to 119-06

B

65/55

85

122

R

16

122-01, 122-03, 122-05

C

70/60

85

122-04 and 122-06

B

65/55

85

123

R

16

123-01, 123-03, 123-05

C

70/60

85

123-04 and 123-06

B

65/55

85

125

R

16

125-01, 125-03, 125-05

C

70/60

85

125-04 and 125-06

B

65/55

85

126

R

16

126-01, 126-03 to 126-05

C

70/60

85

126-06

B

65/55

85

129

R

16

129-01, 129-03, 129-05

C

70/60

85

129-04 and 129-06

B

65/55

85

130

R

17

130-01, 130-03, 130-05

C

70/60

85

130-04 and 130-06

B

65/55

85

132

R

17

132-01, 132-03, 132-05

C

70/60

85

132-04 and 132-06

B

65/55

85

133

R

17

133-01, 133-03, 133-05

C

70/60

85

133-04 and 133-06

B

65/55

85

135

R

17

135-01, 135-03, 135-05

C

70/60

85

R

17

135-04 and 135-06

B

65/55

85

801

E

1

801-01

C

70/-

85

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   R – Residential Premises, E – Educational Institutions, C – Country Parks

[3]   NAP – Noise Assessment Point

[4]   Details on the determination of Area Sensitivity Rating are shown in Appendix 4.1b.

[5]   The criteria are presented for [Daytime and evening time criterion / night-time criterion]. Noise criterion is proposed according to IND-TM.

[6]   Noise criterion between 2300 – 0700 hours according to EIAO-TM.

[7]   N/A – Not Applicable, In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR. However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

Table 4.25c Representative NSRs for rail noise assessment (Phase 1a to Phase 1c population intake after Year 2027)

ID[1]

Uses[2]

No. of Domestic Storey

NAP[3]

ASR[4]

Daytime & Evening/

Night-time Criteria Leq 30 min dB(A)[5]

Criteria Lmax dB(A)[6]

Existing NSRs

N01

C

N/A[7]

N01-01

N/A[7]

N/A[7]

N/A[7]

Planned NSRs

Phase 1a

101

R

17

101-01, 101-03, 101-05

C

70/60

85

R

17

101-04 and 101-06

B

65/55

85

103

R

18

103-01, 103-03 to 103-05

C

70/60

85

R

18

103-06

B

65/55

85

104

R

18

104-01 to 104-03

B

65/55

85

R

18

104-04

C

70/60

85

107

R

18

107-01, 107-03 to 107-06

C

70/60

85

108

R

18

108-01, 108-03 to 108-06

C

70/60

85

110

R

18

110-01, 110-03 to 110-06

C

70/60

85

111

R

19

111-01 to 111-04

C

70/60

85

113

R

19

113-01, 113-03 to 113-06

C

70/60

85

114

R

19

114-01 to 114-04

C

70/60

85

116

R

19

116-01 to 116-04

C

70/60

85

117

R

19

117-01 to 117-04

C

70/60

85

118

R

19

118-01 to 118-04

C

70/60

85

Phase 1a to Phase 1b

119

R

15

119-01, 119-03 to 119-06

B

65/55

85

122

R

16

122-01, 122-03, 122-05

C

70/60

85

122-04 and 122-06

B

65/55

85

123

R

16

123-01, 123-03, 123-05

C

70/60

85

123-04 and 123-06

B

65/55

85

125

R

16

125-01, 125-03, 125-05

C

70/60

85

125-04 and 125-06

B

65/55

85

126

R

16

126-01, 126-03 to 126-05

C

70/60

85

126-06

B

65/55

85

129

R

16

129-01, 129-03, 129-05

C

70/60

85

129-04 and 129-06

B

65/55

85

130

R

17

130-01, 130-03, 130-05

C

70/60

85

130-04 and 130-06

B

65/55

85

132

R

17

132-01, 132-03, 132-05

C

70/60

85

132-04 and 132-06

B

65/55

85

133

R

17

133-01, 133-03, 133-05

C

70/60

85

133-04 and 133-06

B

65/55

85

135

R

17

135-01, 135-03 to 135-06

C

70/60

85

801

E

1

801-01

C

70/-

85

Phase 1a to Phase 1c

136

R

19

136-01 to 136-04

C

70/60

85

139

R

20

139-01 to 139-04

C

70/60

85

140

R

20

140-01 to 140-04

C

70/60

85

142

R

20

142-01, 142-03 to 142-06

C

70/60

85

143

R

20

143-01, 143-03 to 143-06

C

70/60

85

146

R

21

146-01, 146-03 to 146-06

C

70/60

85

147

R

21

147-01, 147-03 to 147-06

C

70/60

85

149

R

21

149-01 to 149-04

C

70/60

85

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   R – Residential Premises, E – Educational Institutions, C – Country Parks

[3]   NAP – Noise Assessment Point

[4]   Details on the determination of Area Sensitivity Rating are shown in Appendix 4.1b.

[5]   The criteria are presented for [Daytime and evening time criterion / night-time criterion]. Noise criterion is proposed according to IND-TM.

[6]   Noise criterion between 2300 – 0700 hours according to EIAO-TM.

[7]   N/A – Not Applicable, In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR. However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

Table 4.25d Representative NSRs for rail noise assessment (Phase 1a to Phase 2 population intake after Year 2030)

ID[1]

Uses[2]

No. of Domestic Storey

NAP[3]

ASR[4]

Daytime & Evening/

Night-time Criteria Leq 30 min dB(A)[5]

Criteria Lmax dB(A)[6]

Existing NSRs

N01

C

N/A[7]

N01-01

N/A[7]

N/A[7]

N/A[7]

Planned NSRs

Phase 1a

101

R

17

101-01, 101-03, 101-05

C

70/60

85

101-04 and 101-06

B

65/55

85

103

R

18

103-01, 103-03 to 103-05

C

70/60

85

103-06

B

65/55

85

104

R

18

104-01 to 104-04

B

65/55

85

107

R

18

107–01, 107–03, 107–05

C

70/60

85

107–04 and 107–06

B

65/55

85

108

R

18

108–01, 108–03, 108–05

C

70/60

85

108–04 and 108–06

B

65/55

85

110

R

18

110–01, 110–03 to 110–05

C

70/60

85

110–06

B

65/55

85

111

R

19

111-01 to 111-04

B

65/55

85

113

R

19

113–01, 113–03 to 113–05

C

70/60

85

113-06

B

65/55

85

114

R

19

114-01 to 114-04

B

65/55

85

116

R

19

116-01 to 116-04

B

65/55

85

117

R

19

117-01 to 117-04

B

65/55

85

118

R

19

118-01 to 118-04

B

65/55

85

Phase 1a to Phase 1b

119

R

15

119-01, 119-03 to 119-06

B

65/55

85

122

R

16

122-01, 122-03, 122-05

C

70/60

85

122-04 and 122-06

B

65/55

85

123

R

16

123-01, 123-03, 123-05

C

70/60

85

123-04 and 123-06

B

65/55

85

125

R

16

125-01, 125-03, 125-05

C

70/60

85

125-04 and 125-06

B

65/55

85

126

R

16

126-01, 126-03 to 126-05

C

70/60

85

126-06

B

65/55

85

129

R

16

129-01, 129-03, 129-05

C

70/60

85

129-04 and 129-06

B

65/55

85

130

R

17

130-01, 130-03, 130-05

C

70/60

85

130-04 and 130-06

B

65/55

85

132

R

17

132-01, 132-03, 132-05

C

70/60

85

132-04 and 132-06

B

65/55

85

133

R

17

133-01, 133-03, 133-05

C

70/60

85

133-04 and 133-06

B

65/55

85

135

R

17

 

135-01, 135-03, 135-05

C

70/60

85

135-04 and 135-06

B

65/55

85

801

E

1

801-01

C

70/-

85

Phase 1a to Phase 1c

136

R

19

136-01 to 136-04

B

65/55

85

139

R

20

139-01 to 139-04

B

65/55

85

140

R

20

140-01 to 140-04

B

65/55

85

142

R

20

142-01, 142-03 to 142-06

C

70/60

85

143

R

20

143-01, 143-03 to 143-06

C

70/60

85

146

R

21

146-01 to 146-04

C

70/60

85

147

R

21

147-01, 147-03 to 147-06

C

70/60

85

149

R

21

149-01 to 149-04

C

70/60

85

Phase 1 to Phase 2

201

R

16

201-01 to 201-03

C

70/60

85

206

R

16

206-01

C

70/60

85

207

R

17

207-01

C

70/60

85

211

R

17

211-01

C

70/60

85

212

R

17

212-01 to 212-02

C

70/60

85

215

R

18

215-01 to 215-04

C

70/60

85

501

E

7

501-01 to 501-05

C

70/-

85

802

E

1

802-01 to 802-02

C

70/-

85

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   R – Residential Premises, E – Educational Institutions, C – Country Parks

[3]   NAP – Noise Assessment Point

[4]   Details on the determination of Area Sensitivity Rating are shown in Appendix 4.1b.

[5]   The criteria are presented for [Daytime and evening time criterion / night-time criterion]. Noise criterion is proposed according to IND-TM.

[6]   Noise criterion between 2300 – 0700 hours according to EIAO-TM.

[7]   N/A – Not Applicable, In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR. However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

Table 4.25e Representative NSRs for rail noise assessment (Phase 1a to Phase 3 after Year 2034)

ID[1]

Uses[2]

No. of Domestic Storey

NAP[3]

ASR[4]

Daytime & Evening/

Night-time Criteria Leq 30 min dB(A)[5]

Criteria Lmax dB(A)[6]

Existing NSRs

N01

C

N/A[7]

N01-01

N/A[7]

N/A[7]

N/A[7]

Planned NSRs

Phase 1a

101

R

17

101-01, 101-03, 101-05

C

70/60

85

101-04 and 101-06

B

65/55

85

103

R

18

103-01, 103-03 to 103-05

C

70/60

85

103-06

B

65/55

85

104

R

18

104-01 to 104-04

B

65/55

85

107

R

18

107–01, 107–03, 107–05

C

70/60

85

107–04 and 107–06

B

65/55

85

108

R

18

108–01, 108–03, 108–05

C

70/60

85

108–04 and 108–06

B

65/55

85

110

R

18

110–01, 110–03 to 110–05

C

70/60

85

110–06

B

65/55

85

111

R

19

111-01 to 111-04

B

65/55

85

113

R

19

113–01, 113–03 to 113–05

C

70/60

85

113-06

B

65/55

85

114

R

19

114-01 to 114-04

B

65/55

85

116

R

19

116-01 to 116-04

B

65/55

85

117

R

19

117-01 to 117-04

B

65/55

85

118

R

19

118-01 to 118-04

B

65/55

85

Phase 1a to Phase 1b

119

R

15

119-01, 119-03 to 119-06

B

65/55

85

122

R

16

122-01, 122-03, 122-05

C

70/60

85

122-04 and 122-06

B

65/55

85

123

R

16

123-01, 123-03, 123-05

C

70/60

85

123-04 and 123-06

B

65/55

85

125

R

16

125-01, 125-03, 125-05

C

70/60

85

125-04 and 125-06

B

65/55

85

126

R

16

126-01, 126-03 to 126-05

C

70/60

85

126-06

B

65/55

85

129

R

16

129-01, 129-03, 129-05

C

70/60

85

129-04 and 129-06

B

65/55

85

130

R

17

130-01, 130-03, 130-05

C

70/60

85

130-04 and 130-06

B

65/55

85

132

R

17

132-01, 132-03, 132-05

C

70/60

85

132-04 and 132-06

B

65/55

85

133

R

17

133-01, 133-03, 133-05

C

70/60

85

133-04 and 133-06

B

65/55

85

135

R

17

 

135-01, 135-03, 135-05

C

70/60

85

135-04 and 135-06

B

65/55

85

801

E

1

801-01

C

70/-

85

Phase 1a to Phase 1c

136

R

19

136-01 to 136-04

B

65/55

85

139

R

20

139-01 to 139-04

B

65/55

85

140

R

20

140-01 to 140-04

B

65/55

85

142

R

20

142-01, 142-03 to 142-05

C

70/60

85

142-06

B

65/55

85

143

R

20

143-01, 143-03 to 143-05

C

70/60

85

143-06

B

65/55

85

146

R

21

146-01 to 146-04

B

65/55

85

147

R

21

147-01, 147-03 to 147-05

C

70/60

85

147-06

B

65/55

85

149

R

21

149-01 to 149-04

B

65/55

85

Phase 1 to Phase 2

201

R

16

201-01 to 201-03

C

70/60

85

206

R

16

206-01

C

70/60

85

207

R

17

207-01

C

70/60

85

211

R

17

211-01

C

70/60

85

212

R

17

212-01 to 212-02

C

70/60

85

215

R

18

215-01 to 215-04

C

70/60

85

501

E

7

501-01 to 501-05

C

70/60

85

802

E

1

802-01 to 802-02

C

70/-

85

Phase 1 to Phase 3

301

R

19

301-01

C

70/60

85

303

R

19

303-01 to 303-07

C

70/60

85

304

R

19

304-01

C

70/60

85

305

R

19

305-01

C

70/60

85

307

R

20

307-01 to 307-06

C

70/60

85

308

R

21

308-01

C

70/60

85

309

R

22

309-01 to 309-02

C

70/60

85

310

R

18

310-01 to 310-04

C

70/60

85

311

R

18

311-01 to 311-02

C

70/60

85

312

R

18

312-01

C

70/60

85

601

E

7

601–01 and 601–06

B

65/-

85

601–02 to 601–05, 601–07 to  601–09

C

70/-

85

803

E

1

803-01

B

65/-

85

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   R – Residential Premises, E – Educational Institutions, C – Country Parks

[3]   NAP – Noise Assessment Point

[4]   Details on the determination of Area Sensitivity Rating are shown in Appendix 4.1b.

[5]   The criteria are presented for [Daytime and evening time criterion / night-time criterion]. Noise criterion is proposed according to IND-TM.

[6]   Noise criterion between 2300 – 0700 hours according to EIAO-TM.

[7]   N/A – Not Applicable, In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR. However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

Table 4.25f Representative NSRs for rail noise assessment (full occupation after Year 2038)

ID[1]

Uses[2]

No. of Domestic Storey

NAP[3]

ASR[4]

Daytime & Evening/

Night-time Criteria Leq 30 min dB(A)[5]

Criteria Lmax dB(A)[6]

Existing NSRs

N01

C

N/A[7]

N01-01

N/A[7]

N/A[7]

N/A[7]

Planned NSRs

Phase 1a

101

R

17

101-01, 101-03, 101-05

C

70/60

85

101-04 and 101-06

B

65/55

85

103

R

18

103-01, 103-03 to 103-05

C

70/60

85

103-06

B

65/55

85

104

R

18

104-01 to 104-04

B

65/55

85

107

R

18

107–01, 107–03, 107–05

C

70/60

85

107–04 and 107–06

B

65/55

85

108

R

18

108–01, 108–03, 108–05

C

70/60

85

108–04 and 108–06

B

65/55

85

110

R

18

110–01, 110–03 to 110–05

C

70/60

85

110–06

B

65/55

85

111

R

19

111-01 to 111-04

B

65/55

85

113

R

19

113–01, 113–03 to 113–05

C

70/60

85

113-06

B

65/55

85

114

R

19

114-01 to 114-04

B

65/55

85

116

R

19

116-01 to 116-04

B

65/55

85

117

R

19

117-01 to 117-04

B

65/55

85

118

R

19

118-01 to 118-04

B

65/55

85

Phase 1a to Phase 1b

119

R

15

119-01, 119-03 to 119-06

B

65/55

85

122

R

16

122-01, 122-03, 122-05

C

70/60

85

122-04 and 122-06

B

65/55

85

123

R

16

123-01, 123-03, 123-05

C

70/60

85

123-04 and 123-06

B

65/55

85

125

R

16

125-01, 125-03, 125-05

C

70/60

85

125-04 and 125-06

B

65/55

85

126

R

16

126-01, 126-03 to 126-05

C

70/60

85

126-06

B

65/55

85

129

R

16

129-01, 129-03, 129-05

C

70/60

85

129-04 and 129-06

B

65/55

85

130

R

17

130-01, 130-03, 130-05

C

70/60

85

130-04 and 130-06

B

65/55

85

132

R

17

132-01, 132-03, 132-05

C

70/60

85

132-04 and 132-06

B

65/55

85

133

R

17

133-01, 133-03, 133-05

C

70/60

85

133-04 and 133-06

B

65/55

85

135

R

17

 

135-01, 135-03, 135-05

C

70/60

85

135-04 and 135-06

B

65/55

85

801

E

1

801-01

C

70/-

85

Phase 1a to Phase 1c

136

R

19

136-01 to 136-04

B

65/55

85

139

R

20

139-01 to 139-04

B

65/55

85

140

R

20

140-01 to 140-04

B

65/55

85

142

R

20

142-01, 142-03 to 142-05

C

70/60

85

142-06

B

65/55

85

143

R

20

143-01, 143-03 to 143-05

C

70/60

85

143-06

B

65/55

85

146

R

21

146-01 to 146-04

B

65/55

85

147

R

21

147-01, 147-03 to 147-05

C

70/60

85

147-06

B

65/55

85

149

R

21

149-01 to 149-04

B

65/55

85

Phase 1 to Phase 2

201

R

16

201-01 to 201-03

C

70/60

85

206

R

16

206-01

C

70/60

85

207

R

17

207-01

C

70/60

85

211

R

17

211-01

C

70/60

85

212

R

17

212-01 to 212-02

C

70/60

85

215

R

18

215-01 to 215-04

C

70/60

85

501

E

7

501-01 to 501-05

C

70/-

85

802

E

1

802-01 to 802-02

C

70/-

85

Phase 1 to Phase 3

301

R

19

301-01

C

70/60

85

303

R

19

303-01 to 303-07

C

70/60

85

304

R

19

304-01

C

70/60

85

305

R

19

305-01

C

70/60

85

307

R

20

307-01 to 307-06

C

70/60

85

308

R

21

308-01

C

70/60

85

309

R

22

309-01 to 309-02

C

70/60

85

310

R

18

310-01 to 310-04

C

70/60

85

311

R

18

311-01 to 311-02

C

70/60

85

312

R

18

312-01

C

70/60

85

601

E

7

601–01 and 601–06

B

65/-

85

601–02 to 601–05, 601–07 to  601–09

C

70/-

85

803

E

1

803-01

B

65/-

85

Phase 1 to Phase 4

401

R

21

401–01 to 401–04

B

65/55

85

403

R

21

403–01 to 403–04

B

65/55

85

404

R

22

404–01 to 404–04

B

65/55

85

407

R

22

407–01 to 407–04

B

65/55

85

408

R

20

408-02 to 408–18

C

70/60

85

409

R

20

409-01 to 409–18

C

70/60

85

414

R

21

414-01 to 414–15

C

70/60

85

415

R

21

415-01 to 415-02

C

70/60

85

419

R

21

419-01 to 419–13

C

70/60

85

420

R

22

420-01 to 420–19

C

70/60

85

421

R

22

421-01 to 421–17

C

70/60

85

422

R

22

422-01 to 422–12

C

70/60

85

701

E

7

701-01 to 701-08

C

70/-

85

804

E

1

804-01

B

65/-

85

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   R – Residential Premises, E – Educational Institutions, C – Country Parks

[3]   NAP – Noise Assessment Point

[4]   Details on the determination of Area Sensitivity Rating are shown in Appendix 4.1b.

[5]   The criteria are presented for [Daytime and evening time criterion / night-time criterion]. Noise criterion is proposed according to IND-TM.

[6]   Noise criterion between 2300 – 0700 hours according to EIAO-TM.

[7]   N/A – Not Applicable, In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR. However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

Inventory of Noise Sources

4.7.2.2           Potential rail noise impacts are anticipated from the existing TCL and AEL which runs on the at-grade ballast track between MTR Tung Chung Station and MTR Tsing Yi Station which is located to the southern side of the proposed development. The noise inventory in the approved Lantau and Airport Railway Environmental Assessment Report (LAR EIA) (EIA-029/BC) has been adopted. Absorptive panel shall be installed under platform of SHO as far as possible to prevent noise reflection. The alignment of rail tracks considered in the assessment is the re-aligned TCL and AEL due to provision of SHO. In addition, the shunting noise in SHD during SHD operation is also included and addressed in this EIA report.

4.7.3                  Prediction and Evaluation of Rail Noise Impact

Scenarios

4.7.3.1           The rail noise impact assessment including the unmitigated scenario and mitigated scenario has been conducted with respect to the criteria set in Annex 5 of the TM. The worst operation mode representing the maximum noise emission has been assessed. Agreement with the Director on the scenarios has been obtained prior to the commencement of the assessment.

4.7.3.2           The following scenarios have been conducted:

·             Phase 1a population intake after April 2026 (Unmitigated Scenario and Mitigated Scenario);

·             Phase 1a to Phase 1b population intake after October 2026 (Unmitigated Scenario and Mitigated Scenario);

·             Phase 1a to Phase 1c population intake after April 2027 (Unmitigated Scenario and Mitigated Scenario);

·             Phase 1 to Phase 2 population intake after January 2030 (Unmitigated Scenario and Mitigated Scenario);

·             Phase 1a to Phase 3 population intake after January 2034 (Unmitigated Scenario and Mitigated Scenario); and

·             Full occupation, i.e. Phase 1 to Phase 4 after July 2038 (Unmitigated Scenario and Mitigated Scenario).

Prediction of Noise Impact

4.7.3.3           The predicted rail noise levels in Leq (30 min) and Lmax during the day and at night at the selected assessment points at various representative floor levels (in m P.D.) are presented on tables and plans of suitable scale.

4.7.3.4           For Lmax prediction, Equation 15.21 in the Transportation Noise Reference Book 1987 has been adopted to calculate Lmax at NSRs, façade correction has been included.

4.7.3.5           The assessment has covered the rail noise impacts associated with the existing railways, the re-aligned TCL and AEL and train movement within SHD due to provision of SHO on existing and planned NSRs with proposed mitigation measures within the assessment area. As the operation of train movement within SHD is different during day-time and night-time, rail noise impact for day-time and night-time have been included.

4.7.3.6           The predicted rail noise levels for TCL/AEL and SHD operation at the representative NSRs are presented in the Table 4.26. Details are provided in Appendix 4.21.

Table 4.26a Predicted rail noise impact at existing and planned NSRs under unmitigated scenario (Phase 1a population intake after Year 2026)

ID[1]

NAP[2]

ASR

Max. Predicted Leq 30 min (Daytime), dB(A)

Max. Predicted Leq 30 min (Night-time), dB(A)

Predicted Lmax[6] , dB(A)

Criteria, dB(A)

Mitigation Measures Required [Y/N]

Leq 30 min[3]

Lmax [5]

Existing NSRs

N01

N01-01

N/A[4]

68

68

80

N/A[4]

N/A[4]

N

Planned NSRs

Phase 1a

101

101-01, 101-03 to 101-06

C

57

57

78

70/60

85

N

103

103-01, 103-03 to 103-05

C

67

67

84

70/60

85

Y

103-06

B

53

51

84

65/55

85

N

104

104-01 to 104-03

B

<40

<40

<60

65/55

85

N

104-04

C

54

52

<60

70/60

85

N

107

107-01, 107-03 to 107-06

C

62

60

77

70/60

85

N

108

108-01, 108-03 to 108-06

C

63

60

76

70/60

85

N

110

110-01, 110-03 to 110-06

C

67

67

83

70/60

85

Y

111

111-01 to 111-04

C

64

61

<60

70/60

85

Y

113

113-01, 113-03 to 113-06

C

67

67

84

70/60

85

Y

114

114-01 to 114-04

C

64

61

<60

70/60

85

Y

116

116-01 to 116-04

C

64

62

<60

70/60

85

Y

117

117-01 to 117-04

C

65

62

<60

70/60

85

Y

118

118-01 to 118-04

C

65

63

<60

70/60

85

Y

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   NAP – Noise Assessment Point

[3]   The criteria are presented for [Daytime and evening time criterion / night-time criterion]. Noise criterion is proposed according to IND-TM.

[4]   N/A – Not Applicable. In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR. However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

[5]   Noise criterion between 2300 – 0700 hours according to EIAO-TM.

[6]   The nearest NSR of each building to the railway is adopted for Lmax calculation to represent the worst case scenario.

Table 4.26b Predicted rail noise impact at existing and planned NSRs under unmitigated scenario (Phase 1a to Phase 1b population intake after Year 2026)

ID[1]

NAP[2]

ASR

Max. Predicted Leq 30 min (Daytime), dB(A)

Max. Predicted Leq 30 min (Night-time), dB(A)

Predicted Lmax[6] , dB(A)

Criteria, dB(A)

Mitigation Measures Required [Y/N]

Leq 30 min[3]

Lmax [5]

Existing NSRs

N01

N01-01

N/A[4]

68

68

80

N/A[4]

N/A[4]

N

Planned NSRs

Phase 1a

101

101-01, 101-03, 101-05

C

45

45

72

70/60

85

N

101-04 and 101-06

B

50

48

72

65/55

85

N

103

103-01, 103-03 to 103-05

C

67

67

84

70/60

85

Y

103-06

B

53

51

84

65/55

85

N

104

104-01 to 104-03

B

<40

<40

<60

65/55

85

N

104-04

C

54

52

<60

70/60

85

N

107

107-01, 107-03 to 107-06

C

62

60

77

70/60

85

N

108

108-01, 108-03 to 108-06

C

63

60

76

70/60

85

N

110

110-01, 110-03 to 110-06

C

67

67

83

70/60

85

Y

111

111-01 to 111-04

C

64

61

<60

70/60

85

Y

113

113-01, 113-03 to 113-06

C

67

67

84

70/60

85

Y

114

114-01 to 114-04

C

64

61

<60

70/60

85

Y

116

116-01 to 116-04

C

64

62

<60

70/60

85

Y

117

117-01 to 117-04

C

65

62

<60

70/60

85

Y

118

118-01 to 118-04

C

65

63

<60

70/60

85

Y

Phase 1a to 1b

119

119-01, 119-03 to 119-06

B

43

45

<60

65/55

85

N

122

122-01, 122-03, 122-05

C

63

63

79

70/60

85

Y

122-04 and 122-06

B

47

47

79

65/55

85

N

123

123-01, 123-03, 123-05

C

61

61

80

70/60

85

Y

123-04 and 123-06

B

41

41

80

65/55

85

N

125

125-01, 125-03, 125-05

C

51

51

71

70/60

85

N

125-04 and 125-06

B

<40

<40

71

65/55

85

N

126

126-01, 126-03 to 126-05

C

57

57

80

70/60

85

N

126-06

B

<40

<40

80

65/55

85

N

129

129-01, 129-03, 129-05

C

51

51

82

70/60

85

N

129-04 and 129-06

B

<40

<40

82

65/55

85

N

130

130-01, 130-03, 130-05

C

51

51

76

70/60

85

N

130-04 and 130-06

B

<40

<40

76

65/55

85

N

132

132-01, 132-03, 132-05

C

60

60

79

70/60

85

N

132-04 and 132-06

B

43

43

79

65/55

85

N

133

133-01, 133-03, 133-05

C

62

62

80

70/60

85

Y

133-04 and 133-06

B

44

44

80

65/55

85

N

135

135–01, 135–03, 135–05

C

49

49

76

70/60

85

N

135–04 and 135–06

B

<40

<40

76

65/55

85

N

801

801-01

C

57

-

76

70/-

85

N

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   NAP – Noise Assessment Point

[3]   The criteria are presented for [Daytime and evening time criterion / night-time criterion]. Noise criterion is proposed according to IND-TM

[4]   N/A – Not Applicable. In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR. However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

[5]   Noise criterion between 2300 – 0700 hours according to EIAO-TM.

[6]   The nearest NSR of each building to the railway is adopted for Lmax calculation to represent the worst case scenario.

Table 4.26c Predicted rail noise impact at existing and planned NSRs under unmitigated scenario (Phase 1a to Phase 1c population intake after Year 2027)

ID[1]

NAP[2]

ASR

Max. Predicted Leq 30 min (Daytime), dB(A)

Max. Predicted Leq 30 min (Night-time), dB(A)

Predicted Lmax[6] , dB(A)

Criteria, dB(A)

Mitigation Measures Required [Y/N]

Leq 30 min[3]

Lmax [5]

Existing NSRs

 

N01

N01-01

N/A[4]

69

69

80

N/A[4]

N/A[4]

N

Planned NSRs

 

Phase 1a

 

101

101-01, 101-03, 101-05

C

45

45

72

70/60

85

N

101-04 and 101-06

B

50

48

72

65/55

85

N

103

103-01, 103-03 to 103-05

C

67

67

84

70/60

85

Y

103-06

B

53

51

84

65/55

85

N

104

104-01 to 104-03

B

<40

<40

<60

65/55

85

N

104-04

C

54

52

<60

70/60

85

N

107

107-01, 107-03 to 107-06

C

62

60

77

70/60

85

N

108

108-01, 108-03 to 108-06

C

63

60

76

70/60

85

N

110

110-01, 110-03 to 110-06

C

67

67

83

70/60

85

Y

111

111-01 to 111-04

C

64

61

<60

70/60

85

Y

113

113-01, 113-03 to 113-06

C

67

67

84

70/60

85

Y

114

114-01 to 114-04

C

64

61

<60

70/60

85

Y

116

116-01 to 116-04

C

64

62

<60

70/60

85

Y

117

117-01 to 117-04

C

65

62

<60

70/60

85

Y

118

118-01 to 118-04

C

65

63

<60

70/60

85

Y

Phase 1a to Phase 1b

 

119

119-01, 119-03 to 119-06

B

43

45

<60

65/55

85

N

122

122-01, 122-03, 122-05

C

63

63

79

70/60

85

Y

122-04 and 122-06

B

47

47

79

65/55

85

N

123

123-01, 123-03, 123-05

C

61

61

80

70/60

85

Y

123-04 and 123-06

B

41

41

80

65/55

85

N

125

125-01, 125-03, 125-05

C

51

51

71

70/60

85

N

125-04 and 125-06

B

<40

<40

71

65/55

85

N

126

126-01, 126-03 to 126-05

C

57

57

80

70/60

85

N

126-06

B

<40

<40

80

65/55

85

N

129

129-01, 129-03, 129-05

C

51

51

82

70/60

85

N

129-04 and 129-06

B

<40

<40

82

65/55

85

N

130

130-01, 130-03, 130-05

C

51

51

76

70/60

85

N

130-04 and 130-06

B

<40

<40

76

65/55

85

N

132

132-01, 132-03, 132-05

C

60

60

79

70/60

85

N

132-04 and 132-06

B

43

43

79

65/55

85

N

133

133-01, 133-03, 133-05

C

62

62

80

70/60

85

Y

133-04 and 133-06

B

44

44

80

65/55

85

N

135

135–01, 135–03, 135–05

C

49

49

76

70/60

85

N

135–04 and 135–06

B

<40

<40

76

65/55

85

N

801

801-01

C

57

-

76

70/-

85

N

Phase 1a to Phase 1c

 

136

136-01 to 136-04

C

65

63

76

70/60

85

Y

139

139-01 to 139-04

C

64

62

<60

70/60

85

Y

140

140-01 to 140-04

C

64

62

<60

70/60

85

Y

142

142-01, 142-03 to 142-06

C

66

63

<60

70/60

85

Y

143

143-01, 143-03 to 143-06

C

63

62

77

70/60

85

Y

146

146-01 to 146-04

C

59

55

78

70/60

85

N

147

147-01, 147-03 to 147-06

C

67

67

<60

70/60

85

Y

149

149-01 to 149-04

C

70

67

84

70/60

85

N

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   NAP – Noise Assessment Point

[3]   The criteria are presented for [Daytime and evening time criterion / night-time criterion]. Noise criterion is proposed according to IND-TM

[4]   N/A – Not Applicable. In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR. However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

[5]   Noise criterion between 2300 – 0700 hours according to EIAO-TM.

[6]   The nearest NSR of each building to the railway is adopted for Lmax calculation to represent the worst case scenario.

Table 4.26d Predicted rail noise impact at existing and planned NSRs under unmitigated scenario (Phase 1a to Phase 2 population intake after Year 2030)

ID[1]

NAP[2]

ASR

Max. Predicted Leq 30 min (Daytime), dB(A)

Max. Predicted Leq 30 min (Night-time), dB(A)

Predicted Lmax[6] , dB(A)

Criteria, dB(A)

Mitigation Measures Required [Y/N]

Leq 30 min[3]

Lmax [5]

Existing NSRs

N01

N01-01

N/A[4]

69

69

80

N/A[4]

N/A[4]

N

Planned NSRs

Phase 1

101

101-01, 101-03, 101-05

C

45

45

72

70/60

85

N

101-04 and 101-06

B

<40

<40

72

65/55

85

N

103

103-01, 103-03 to 103-05

C

67

67

84

70/60

85

Y

103-06

B

44

44

84

65/55

85

N

104

104-01 to 104-04

B

<40

<40

<60

65/55

85

N

107

107–01, 107–03, 107–05

C

56

56

77

70/60

85

N

107–04 and 107–06

B

<40

<40

77

65/55

85

N

108

108–01, 108–03, 108–05

C

57

57

76

70/60

85

N

108–04 and 108–06

B

<40

<40

76

65/55

85

N

110

110–01, 110–03 to 110–05

C

67

67

83

70/60

85

Y

110–06

B

42

42

83

65/55

85

N

111

111-01 to 111-04

B

<40

<40

<60

65/55

85

N

113

113–01, 113–03 to 113–05

C

67

67

84

70/60

85

Y

113-06

B

41

41

84

65/55

85

N

114

114-01 to 114-04

B

<40

<40

<60

65/55

85

N

116

116-01 to 116-04

B

<40

<40

<60

65/55

85

N

117

117-01 to 117-04

B

<40

<40

<60

65/55

85

N

118

118-01 to 118-04

B

<40

<40

<60

65/55

85

N

Phase 1a to Phase 1b

119

119-01, 119-03 to 119-06

B

45

45

<60

65/55

85

N

122

122-01, 122-03, 122-05

C

63

63

<60

70/60

85

Y

122-04 and 122-06

B

47

47

<60

65/55

85

N

123

123-01, 123-03, 123-05

C

61

61

80

70/60

85

Y

123-04 and 123-06

B

41

41

80

65/55

85

N

125

125-01, 125-03, 125-05

C

51

51

71

70/60

85

N

125-04 and 125-06

B

<40

<40

71

65/55

85

N

126

126-01, 126-03 to 126-05

C

57

57

80

70/60

85

N

126-06

B

<40

<40

80

65/55

85

N

129

129-01, 129-03, 129-05

C

51

51

82

70/60

85

N

129-04 and 129-06

B

<40

<40

82

65/55

85

N

130

130-01, 130-03, 130-05

C

51

51

76

70/60

85

N

130-04 and 130-06

B

<40

<40

76

65/55

85

N

132

132-01, 132-03, 132-05

C

60

60

79

70/60

85

N

132-04 and 132-06

B

43

43

79

65/55

85

N

133

133-01, 133-03, 133-05

C

62

62

80

70/60

85

Y

133-04 and 133-06

B

44

44

80

65/55

85

N

135

135-01, 135-03, 135-05

C

49

49

76

70/60

85

N

135-04 and 135-06

B

<40

<40

76

65/55

85

N

801

801-01

C

57

-

76

70/-

85

N

Phase 1a to Phase 1c

136

136-01 to 136-04

B

<40

<40

<60

65/55

85

N

139

139-01 to 139-04

B

<40

<40

<60

65/55

85

N

140

140-01 to 140-04

B

<40

<40

<60

65/55

85

N

142

142-01, 142-03 to 142-06

C

60

59

77

70/60

85

N

143

143-01, 143-03 to 143-06

C

60

60

78

70/60

85

N

146

146-01 to 146-04

C

55

<40

<60

70/60

85

N

147

147-01, 147-03 to 147-06

C

67

67

84

70/60

85

Y

149

149-01 to 149-04

C

59

<40

<60

70/60

85

N

Phase 1 to Phase 2

201

201-01 to 201-03

C

57

57

75

70/60

85

N

206

206-01

C

50

50

72

70/60

85

N

207

207-01

C

46

46

69

70/60

85

N

211

211-01

C

50

50

77

70/60

85

N

212

212-01 to 212-02

C

50

50

74

70/60

85

N

215

215-01 to 215-04

C

48

48

68

70/60

85

N

501

501-01 to 501-05

C

52

-

74

70/-

85

N

802

802-01 to 802-02

C

57

-

76

70/-

85

N

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   NAP – Noise Assessment Point

[3]   The criteria are presented for [Daytime and evening time criterion / night-time criterion]. Noise criterion is proposed according to IND-TM

[4]   N/A – Not Applicable. In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR. However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

[5]   Noise criterion between 2300 – 0700 hours according to EIAO-TM.

[6]   The nearest NSR of each building to the railway is adopted for Lmax calculation to represent the worst case scenario.

Table 4.26e Predicted rail noise impact at existing and planned NSRs under unmitigated scenario (Phase 1a to Phase 3 population intake after Year 2034)

ID[1]

NAP[2]

ASR

Max. Predicted Leq 30 min (Daytime), dB(A)

Max. Predicted Leq 30 min (Night-time), dB(A)

Predicted Lmax[6] , dB(A)

Criteria, dB(A)

Mitigation Measures Required [Y/N]

Leq 30 min[3]

Lmax [5]

Existing NSRs

N01

N01-01

N/A[4]

69

69

80

N/A[4]

N/A[4]

N

Planned NSRs

Phase 1a

101

101-01, 101-03, 101-05

C

45

45

72

70/60

85

N

101-04 and 101-06

B

<40

<40

72

65/55

85

N

103

103-01, 103-03 to 103-05

C

67

67

84

70/60

85

Y

103-06

B

44

44

84

65/55

85

N

104

104-01 to 104-04

B

<40

<40

<60

65/55

85

N

107

107–01, 107–03, 107–05

C

56

56

77

70/60

85

N

107–04 and 107–06

B

<40

<40

77

65/55

85

N

108

108–01, 108–03, 108–05

C

57

57

76

70/60

85

N

108–04 and 108–06

B

<40

<40

76

65/55

85

N

110

110–01, 110–03 to 110–05

C

67

67

83

70/60

85

Y

110–06

B

42

42

83

65/55

85

N

111

111-01 to 111-04

B

<40

<40

<60

65/55

85

N

113

113–01, 113–03 to 113–05

C

67

67

84

70/60

85

Y

113-06

B

41

41

84

65/55

85

N

114

114-01 to 114-04

B

<40

<40

<60

65/55

85

N

116

116-01 to 116-04

B

<40

<40

<60

65/55

85

N

117

117-01 to 117-04

B

<40

<40

<60

65/55

85

N

118

118-01 to 118-04

B

<40

<40

<60

65/55

85

N

Phase 1a to Phase 1b

119

119-01, 119-03 to 119-06

B

45

45

<60

65/55

85

N

122

122-01, 122-03, 122-05

C

63

63

<60

70/60

85

Y

122-04 and 122-06

B

47

47

<60

65/55

85

N

123

123-01, 123-03, 123-05

C

61

61

80

70/60

85

Y

123-04 and 123-06

B

41

41

80

65/55

85

N

125

125-01, 125-03, 125-05

C

51

51

71

70/60

85

N

125-04 and 125-06

B

<40

<40

71

65/55

85

N

126

126-01, 126-03 to 126-05

C

57

57

80

70/60

85

N

126-06

B

<40

<40

80

65/55

85

N

129

129-01, 129-03, 129-05

C

51

51

82

70/60

85

N

129-04 and 129-06

B

<40

<40

82

65/55

85

N

130

130-01, 130-03, 130-05

C

51

51

76

70/60

85

N

130-04 and 130-06

B

<40

<40

76

65/55

85

N

132

132-01, 132-03, 132-05

C

60

60

79

70/60

85

N

132-04 and 132-06

B

43

43

79

65/55

85

N

133

133-01, 133-03, 133-05

C

62

62

80

70/60

85

Y

133-04 and 133-06

B

44

44

80

65/55

85

N

135

135-01, 135-03, 135-05

C

49

49

76

70/60

85

N

135-04 and 135-06

B

<40

<40

76

65/55

85

N

801

801-01

C

57

-

76

70/-

85

N

Phase 1a to Phase 1c

136

136-01 to 136-04

B

<40

<40

<60

65/55

85

N

139

139-01 to 139-04

B

<40

<40

<60

65/55

85

N

140

140-01 to 140-04

B

<40

<40

<60

65/55

85

N

142

142-01, 142-03 to 142-05

C

59

59

77

70/60

85

N

142-06

B

43

43

77

65/55

85

N

143

143-01, 143-03 to 143-05

C

60

60

78

70/60

85

N

143-06

B

45

45

78

65/55

85

N

146

146-01 to 146-04

B

<40

<40

<60

65/55

85

N

147

147-01, 147-03 to 147-05

C

67

67

84

70/60

85

Y

147-06

B

40

40

84

65/55

85

N

149

149-01 to 149-04

B

<40

<40

<60

65/55

85

N

Phase 1 to Phase 2

201

201-01 to 201-03

C

57

57

75

70/60

85

N

206

206-01

C

50

50

72

70/60

85

N

207

207-01

C

46

46

69

70/60

85

N

211

211-01

C

50

50

77

70/60

85

N

212

212-01 to 212-02

C

50

50

74

70/60

85

N

215

215-01 to 215-04

C

48

48

68

70/60

85

N

501

501-01 to 501-05

C

52

-

74

70/-

85

N

802

802-01 to 802-02

C

57

-

76

70/-

85

N

Phase 1 to Phase 3

301

301-01

C

50

50

77

70/60

85

N

303

303-01 to 303-07

C

56

56

73

70/60

85

N

304

304-01

C

50

50

69

70/60

85

N

305

305-01

C

51

51

70

70/60

85

N

307

307-01 to 307-06

C

62

62

73

70/60

85

Y

308

308-01

C

55

55

70

70/60

85

N

309

309-01 to 309-02

C

57

57

70

70/60

85

N

310

310-01 to 310-04

C

50

50

72

70/60

85

N

311

311-01 to 311-02

C

50

50

69

70/60

85

N

312

312-01

C

49

49

69

70/60

85

N

601

601–01 and 601–06

B

52

-

74

65/55

85

N

601–02 to 601–05, 601–07 to  601–09

C

54

-

74

70/-

85

N

803

803-01

B

<40

-

<60

65-

85

N

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   NAP – Noise Assessment Point

[3]   The criteria are presented for [Daytime and evening time criterion / night-time criterion]. Noise criterion is proposed according to IND-TM

[4]   N/A – Not Applicable. In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR. However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

[5]   Noise criterion between 2300 – 0700 hours according to EIAO-TM.

[6]  Only the first layer of NSRs are selected for Lmax prediction as Phase 1a to Phase 1c and Phase 4a could provide noise screening to rail noise on the residential blocks in Phase 2, Phase 3, Phase 4b and Phase 4c. As the predicted maximum Lmax for first layer of NSR is 85 dB(A), therefore, the predicted Lmax for Phase 2, Phase 3, Phase 4b and Phase 4c should be smaller than 85dB(A), which complies with the Lmax criterion. 

Table 4.26f Predicted rail noise impact at existing and planned NSRs under unmitigated scenario (full occupation after Year 2038)

ID[1]

NAP[2]

ASR

Max. Predicted Leq 30 min (Daytime), dB(A)

Max. Predicted Leq 30 min (Night-time), dB(A)

Predicted Lmax[6] , dB(A)

Criteria, dB(A)

Mitigation Measures Required [Y/N]

Leq 30 min[3]

Lmax [5]

Existing NSRs

N01

N01-01

N/A[4]

69

69

80

N/A[4]

N/A[4]

N

Planned NSRs

Phase 1a

101

101-01, 101-03, 101-05

C

45

45

72

70/60

85

N

101-04 and 101-06

B

<40

<40

72

65/55

85

N

103

103-01, 103-03 to 103-05

C

67

67

84

70/60

85

Y

103-06

B

44

44

84

65/55

85

N

104

104-01 to 104-04

B

<40

<40

<60

65/55

85

N

107

107–01, 107–03, 107–05

C

56

56

77

70/60

85

N

107–04 and 107–06

B

<40

<40

77

65/55

85

N

108

108–01, 108–03, 108–05

C

57

57

76

70/60

85

N

108–04 and 108–06

B

<40

<40

76

65/55

85

N

110

110–01, 110–03 to 110–05

C

67

67

83

70/60

85

Y

110–06

B

42

42

83

65/55

85

N

111

111-01 to 111-04

B

<40

<40

<60

65/55

85

N

113

113–01, 113–03 to 113–05

C

67

67

84

70/60

85

Y

113-06

B

41

41

84

65/55

85

N

114

114-01 to 114-04

B

<40

<40

<60

65/55

85

N

116

116-01 to 116-04

B

<40

<40

<60

65/55

85

N

117

117-01 to 117-04

B

<40

<40

<60

65/55

85

N

118

118-01 to 118-04

B

<40

<40

<60

65/55

85

N

Phase 1a to Phase 1b

119

119-01, 119-03 to 119-06

B

45

45

<60

65/55

85

N

122

122-01, 122-03, 122-05

C

63

63

<60

70/60

85

Y

122-04 and 122-06

B

47

47

<60

65/55

85

N

123

123-01, 123-03, 123-05

C

61

61

80

70/60

85

Y

123-04 and 123-06

B

41

41

80

65/55

85

N

125

125-01, 125-03, 125-05

C

51

51

71

70/60

85

N

125-04 and 125-06

B

<40

<40

71

65/55

85

N

126

126-01, 126-03 to 126-05

C

57

57

80

70/60

85

N

126-06

B

<40

<40

80

65/55

85

N

129

129-01, 129-03, 129-05

C

51

51

82

70/60

85

N

129-04 and 129-06

B

<40

<40

82

65/55

85

N

130

130-01, 130-03, 130-05

C

51

51

76

70/60

85

N

130-04 and 130-06

B

<40

<40

76

65/55

85

N

132

132-01, 132-03, 132-05

C

60

60

79

70/60

85

N

132-04 and 132-06

B

43

43

79

65/55

85

N

133

133-01, 133-03, 133-05

C

62

62

80

70/60

85

Y

133-04 and 133-06

B

44

44

80

65/55

85

N

135

135-01, 135-03, 135-05

C

49

49

76

70/60

85

N

135-04 and 135-06

B

<40

<40

76

65/55

85

N

801

801-01

C

57

-

76

70/-

85

N

Phase 1a to Phase 1c

136

136-01 to 136-04

B

<40

<40

<60

65/55

85

N

139

139-01 to 139-04

B

<40

<40

<60

65/55

85

N

140

140-01 to 140-04

B

<40

<40

<60

65/55

85

N

142

142-01, 142-03 to 142-05

C

59

59

77

70/60

85

N

142-06

B

40

40

77

65/55

85

N

143

143-01, 143-03 to 143-05

C

60

60

78

70/60

85

N

143-06

B

41

41

78

65/55

85

N

146

146-01 to 146-04

B

<40

<40

<60

65/55

85

N

147

147-01, 147-03 to 147-05

C

67

67

84

70/60

85

Y

147-06

B

40

40

84

65/55

85

N

149

149-01 to 149-04

B

<40

<40

<60

65/55

85

N

Phase 1 to Phase 2

201

201-01 to 201-03

C

57

57

75

70/60

85

N

206

206-01

C

50

50

72

70/60

85

N

207

207-01

C

46

46

69

70/60

85

N

211

211-01

C

50

50

77

70/60

85

N

212

212-01 to 212-02

C

50

50

74

70/60

85

N

215

215-01 to 215-04

C

48

48

68

70/60

85

N

501

501-01 to 501-05

C

52

-

74

70/-

85

N

802

802-01 to 802-02

C

57

-

76

70/-

85

N

Phase 1 to Phase 3

301

301-01

C

50

50

77

70/60

85

N

303

303-01 to 303-07

C

56

56

73

70/60

85

N

304

304-01

C

50

50

69

70/60

85

N

305

305-01

C

51

51

70

70/60

85

N

307

307-01 to 307-06

C

62

62

73

70/60

85

Y

308

308-01

C

48

48

70

70/60

85

N

309

309-01 to 309-02

C

48

48

70

70/60

85

N

310

310-01 to 310-04

C

50

50

72

70/60

85

N

311

311-01 to 311-02

C

50

50

69

70/60

85

N

312

312-01

C

49

49

69

70/60

85

N

601

601–01 and 601–06

B

52

-

74

65/-

85

N

601–02 to 601–05, 601–07 to  601–09

C

54

-

74

70/-

85

N

803

803-01

B

<40

-

<60

65/-

85

N

Phase 1 to Phase 4

401

401–01 to 401–04

B

<40

<40

<60

65/55

85

N

403

403–01 to 403–04

B

<40

<40

<60

65/55

85

N

404

404–01 to 404–04

B

<40

<40

<60

65/55

85

N

407

407–01 to 407–04

B

<40

<40

<60

65/55

85

N

408

408-02 to 408–18

C

60

60

78

70/60

85

N

409

409-01 to 409–18

C

58

58

77

70/60

85

N

414

414-01 to 414–15

C

63

63

75

70/60

85

Y

415

415-01 to 415-02

C

55

55

72

70/60

85

N

419

419-01 to 419–13

C

52

52

73

70/60

85

N

420

420-01 to 420–19

C

53

53

77

70/60

85

N

421

421-01 to 421–17

C

58

58

81

70/60

85

N

422

422-01 to 422–12

C

63

63

84

70/60

85

Y

701

701-01 to 701-08

C

57

-

81

70/-

85

N

804

804-01

B

<40

-

<60

65/-

85

N

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   NAP – Noise Assessment Point

[3]   The criteria are presented for [Daytime and evening time criterion / night-time criterion]. Noise criterion is proposed according to IND-TM

[4]   N/A – Not Applicable. In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR. However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

[5]   Noise criterion between 2300 – 0700 hours according to EIAO-TM.

[6]   Only the first layer of NSRs are selected for Lmax prediction as Phase 1a to Phase 1c and Phase 4a could provide noise screening to rail noise on the residential blocks in Phase 2, Phase 3, Phase 4b and Phase 4c. As the predicted maximum Lmax for first layer of NSR is 85 dB(A), therefore, the predicted Lmax for Phase 2, Phase 3, Phase 4b and Phase 4c should be smaller than 85dB(A), which complies with the Lmax criterion.

4.7.3.7           It can be seen that most of the NSRs met the criteria except some NSRs exceed the night-time criterion of 1 – 7 dB(A). Hence, mitigation measures are required. The rail noise impact at Country Park (N01) ranges from 68 to 69 dB(A). Given the transient nature of visitor using hiking trails, adverse noise impact is not anticipated.

4.7.3.8           The total number of dwellings, classrooms and other noise sensitive receivers that will be exposed to rail noise impact exceeding the criteria set in Annex 5 in the EIAO-TM have been calculated. It is predicted that a total of about 200 dwellings will be exposed to rail noise impact under unmitigated scenario during Phase 1a; 200 dwellings during Phase 1a to 1b; 400 dwellings during Phase 1a to 1c, 400 dwellings during Phase 1a to 2, 400 dwellings during Phase 1a to 3 and 400 dwellings after full occupation.

4.7.4                  Mitigation of Rail Noise Impact

Direct Mitigation Measures

4.7.4.1           As the unmitigated scenario has exceeded the respective noise criterion, the proposed rail noise mitigation measures are shown in Table 4.27 and Figure 4.6.  

Table 4.27 Extents and locations of proposed mitigation measures for rail noise

Phase

NAP[1]

Type of Mitigation Measures[2, 4]

Phase 1

103

Noise canopy[3]

110

Noise canopy[3]

113

Noise canopy[3]

122

Noise canopy[3]

123

Noise canopy[3]

133

Noise canopy[3]

147

Noise canopy[3]

Phase 3

307

Noise canopy[3]

Phase 4

414

Noise canopy[3]

422

Noise canopy[3]

Notes:

[1]         NAP – Noise Assessment Point

[2]         Details are shown in Figure 4.6.

[3]         Out of 1.6km, a total of about 1.1km sections of noise canopy has been proposed along the southern edge of the podium at +23mPD to protect the NSRs against road traffic and rail noise impacts.  Extend of canopy for each phase is shown in Figure 4.1c. Typical section of noise canopy is given in Appendix 4.22.

[4]         In addition, temporary cantilever noise barrier and canopy at the podium edge are proposed after Phase 1 to mitigate the shunting noise during SHD replanning works. Extend of the cantilever noise barrier and canopy is shown in Figure 4.6e.

4.7.4.2           Summary of the proposed road traffic noise and rail noise mitigation measures are shown in Table 4.28.

Table 4.28 Extents and locations of proposed mitigation measures for road traffic noise and rail noise

Phase

NAP[1]

Type of Mitigation Measures[2,5]

Phase 1

103

Acoustic windows

Noise canopy[4]

110

Acoustic windows

Noise canopy[4]

113

Acoustic windows

Noise canopy[4]

122

Noise canopy[4]

123

Noise canopy[4]

133

Noise canopy[4]

143

Acoustic windows

147

Acoustic windows

Noise canopy[4]

801

Acoustic windows

Phase 2

802

Acoustic windows

Phase 3

307

Noise canopy[4]

601

Noise tolerant use[3]

Phase 4

408

Acoustic windows

409

Acoustic windows

414

Noise canopy[4]

420

Acoustic windows

421

Acoustic windows

422

Acoustic windows

Noise canopy[4]

701

Noise tolerant use[3]

Notes:

[1]         NAP – Noise Assessment Point

[2]         Details are shown in Figure 4.6.

[3]         Noise tolerant use is proposed to be arranged in the internal layout at the facade facing the NLH. Details are shown in Figure 4.6.

[4]         Out of 1.6km, a total of about 1.1km sections of noise canopy has been proposed along the southern edge of the podium at +23mPD to protect the NSRs against road traffic and rail noise impacts.  Extend of canopy for each phase is shown in Figure 4.1c. Typical section of noise canopy is given in Appendix 4.22.

[5]         In addition, temporary cantilever noise barrier and canopy at the podium edge are proposed after Phase 1 to mitigate the shunting noise during SHD replanning works. Extend of the cantilever noise barrier and canopy is shown in Figure 4.6e.

4.7.4.3           There might be potential wheel squeal when train moving through sharp bends within existing SHD.  The passenger trains has been installed with stick lubricator to minimize the potential wheel squeal, where necessary, further administrative measures including train wheel and rail lubrication techniques will be adopted, during the operation of existing SHD to minimize the potential wheel squeal.

4.7.4.4           Fixed glazing could be considered as specially provided glazing under NCO in the later detail design stage. When fixed/rail noise is transmitted to the NSR primarily through specially provided glazing at the facade of the building as considered appropriate for reducing the noise, and the assessment point is a particular internal location considered appropriate having regard to the normal occupancy of the building, the proposed fixed glazing will be provided with sufficient noise insulation performance to meet NCO TM requirement.

4.7.4.5           The predicted mitigated noise levels at representative NSRs are presented in Table 4.29. Details are provided in Appendix 4.23.

Table 4.29a Predicted rail noise impact at existing and planned NSRs under mitigated scenario (Phase 1a population intake after Year 2026)

ID[1]

NAP[2]

ASR

Max. Predicted Leq 30 min (Daytime), dB(A)

Max. Predicted Leq 30 min (Night-time), dB(A)

Criteria, dB(A)

Mitigation Measures Required [Y/N]

Leq 30 min[3]

Existing NSRs

N01

N01-01

N/A[4]

68

68

N/A[4]

N

Planned NSRs

Phase 1a

101

101-01, 101-03, 101-06

C

57

57

70/60

N

103

103-01, 103-03 to 103-05

C

53

53

70/60

N

103-06

B

46

44

65/55

N

104

104-01 to 104-03

B

<40

<40

65/55

N

104-04

C

48

45

70/60

N

107

107-01, 107-03 to 107-06

C

53

51

70/60

N

108

108-01, 108-03 to 108-06

C

56

54

70/60

N

110

110-01, 110-03 to 110-06

C

55

54

70/60

N

111

111-01 to 111-04

C

52

50

70/60

N

113

113-01, 113-03 to 113-06

C

54

53

70/60

N

114

114-01 to 114-04

C

52

50

70/60

N

116

116-01 to 116-04

C

54

51

70/60

N

117

117-01 to 117-04

C

56

53

70/60

N

118

118-01 to 118-04

C

61

58

70/60

N

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   NAP – Noise Assessment Point

[3]   The criteria are presented for [Daytime and evening time criterion / night-time criterion]. Noise criterion is proposed according to IND-TM

[4]   N/A – Not Applicable. In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR. However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

[5]   Noise criterion between 2300 – 0700 hours according to EIAO-TM.

[6]   The nearest NSR of each building to the railway is adopted for Lmax calculation to represent the worst case scenario.

Table 4.29b Predicted rail noise impact at existing and planned NSRs under mitigated scenario (Phase 1a to Phase 1b population intake after Year 2026)

ID[1]

NAP[2]

ASR

Max. Predicted Leq 30 min (Daytime), dB(A)

Max. Predicted Leq 30 min (Night-time), dB(A)

Criteria, dB(A)

Mitigation Measures Required [Y/N]

Leq 30 min[3]

Existing NSRs

N01

N01-01

N/A[4]

68

68

N/A[4]

N

Planned NSRs

Phase 1a

101

101-01, 101-03, 101-05

C

<40

<40

70/60

N

101-04 and 101-06

B

46

44

65/55

N

103

103-01, 103-03 to 103-05

C

53

53

70/60

N

103-06

B

46

44

65/55

N

104

104-01 to 104-03

B

<40

<40

65/55

N

104-04

C

48

45

70/60

N

107

107-01, 107-03 to 107-06

C

53

51

70/60

N

108

108-01, 108-03 to 108-06

C

56

54

70/60

N

110

110-01, 110-03 to 110-06

C

55

54

70/60

N

111

111-01 to 111-04

C

52

50

70/60

N

113

113-01, 113-03 to 113-06

C

54

53

70/60

N

114

114-01 to 114-04

C

52

50

70/60

N

116

116-01 to 116-04

C

54

51

70/60

N

117

117-01 to 117-04

C

56

53

70/60

N

118

118-01 to 118-04

C

61

58

70/60

N

Phase 1a to Phase 1b

119

119-01, 119-03 to 119-06

B

<40

42

65/55

N

122

122-01, 122-03, 122-05

C

44

44

70/60

N

122-04 and 122-06

B

<40

<40

65/55

N

123

123-01, 123-03, 123-05

C

51

51

70/60

N

123-04 and 123-06

B

<40

<40

65/55

N

125

125-01, 125-03, 125-05

C

51

51

70/60

N

125-04 and 125-06

B

<40

<40

65/55

N

126

126-01, 126-03 to 126-05

C

45

45

70/60

N

126-06

B

<40

<40

65/55

N

129

129-01, 129-03, 129-05

C

<40

<40

70/60

N

129-04 and 129-06

B

<40

<40

65/55

N

130

130-01, 130-03, 130-05

C

51

51

70/60

N

130-04 and 130-06

B

<40

<40

65/55

N

132

132-01, 132-03, 132-05

C

43

43

70/60

N

132-04 and 132-06

B

41

41

65/55

N

133

133-01, 133-03, 133-05

C

41

41

70/60

N

133-04 and 133-06

B

<40

<40

65/55

N

135

135–01, 135–03, 135–05

C

<40

<40

70/60

N

135–04 and 135–06

B

<40

<40

65/55

N

801

801-01

C

57

-

70/-

N

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   NAP – Noise Assessment Point

[3]   The criteria are presented for [Daytime and evening time criterion / night-time criterion]. Noise criterion is proposed according to IND-TM

[4]   N/A – Not Applicable. In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR. However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

[5]   Noise criterion between 2300 – 0700 hours according to EIAO-TM.

[6]   The nearest NSR of each building to the railway is adopted for Lmax calculation to represent the worst case scenario.

Table 4.29c Predicted rail noise impact at existing and planned NSRs under mitigated scenario (Phase 1a to Phase 1c population intake after Year 2027)

ID[1]

NAP[2]

ASR

Max. Predicted Leq 30 min (Daytime), dB(A)

Max. Predicted Leq 30 min (Night-time), dB(A)

Criteria, dB(A)

Mitigation Measures Required [Y/N]

Leq 30 min[3]

Existing NSRs

 

N01

N01-01

N/A[4]

69

69

N/A[4]

N

Planned NSRs

 

Phase 1a

 

101

101-01, 101-03, 101-05

C

<40

<40

70/60

N

101-04 and 101-06

B

46

44

65/55

N

103

103-01, 103-03 to 103-05

C

53

53

70/60

N

103-06

B

46

44

65/55

N

104

104-01 to 104-03

B

<40

<40

65/55

N

104-04

C

48

45

70/60

N

107

107-01, 107-03 to 107-06

C

53

51

70/60

N

108

108-01, 108-03 to 108-06

C

56

54

70/60

N

110

110-01, 110-03 to 110-06

C

55

54

70/60

N

111

111-01 to 111-04

C

52

50

70/60

N

113

113-01, 113-03 to 113-06

C

54

53

70/60

N

114

114-01 to 114-04

C

52

50

70/60

N

116

116-01 to 116-04

C

54

51

70/60

N

117

117-01 to 117-04

C

56

53

70/60

N

118

118-01 to 118-04

C

61

58

70/60

N

Phase 1a to Phase 1b

119

119-01, 119-03 to 119-06

B

<40

42

65/55

N

122

122-01, 122-03, 122-05

C

44

44

70/60

N

122-04 and 122-06

B

<40

<40

65/55

N

123

123-01, 123-03, 123-05

C

51

51

70/60

N

123-04 and 123-06

B

<40

<40

65/55

N

125

125-01, 125-03, 125-05

C

51

51

70/60

N

125-04 and 125-06

B

<40

<40

65/55

N

126

126-01, 126-03 to 126-05

C

45

45

70/60

N

126-06

B

<40

<40

65/55

N

129

129-01, 129-03, 129-05

C

<40

<40

70/60

N

129-04 and 129-06

B

<40

<40

65/55

N

130

130-01, 130-03, 130-05

C

51

51

70/60

N

130-04 and 130-06

B

<40

<40

65/55

N

132

132-01, 132-03, 132-05

C

43

43

70/60

N

132-04 and 132-06

B

41

41

65/55

N

133

133-01, 133-03, 133-05

C

41

41

70/60

N

133-04 and 133-06

B

<40

<40

65/55

N

135

135–01, 135–03, 135–05

C

<40

<40

70/60

N

135–04 and 135–06

B

<40

<40

65/55

N

801

801-01

C

57

-

70/-

N

Phase 1a to Phase 1c

136

136-01 to 136-04

C

60

58

70/60

N

139

139-01 to 139-04

C

55

53

70/60

N

140

140-01 to 140-04

C

56

53

70/60

N

142

142-01, 142-03 to 142-06

C

59

57

70/60

N

143

143-01, 143-03 to 143-06

C

56

55

70/60

N

146

146-01 to 146-04

C

55

44

70/60

N

147

147-01, 147-03 to 147-06

C

57

55

70/60

N

149

149-01 to 149-04

C

61

56

70/60

N

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   NAP – Noise Assessment Point

[3]   The criteria are presented for [Daytime and evening time criterion / night-time criterion]. Noise criterion is proposed according to IND-TM

[4]   N/A – Not Applicable. In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR. However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

[5]   Noise criterion between 2300 – 0700 hours according to EIAO-TM.

[6]   The nearest NSR of each building to the railway is adopted for Lmax calculation to represent the worst case scenario.

Table 4.29d Predicted rail noise impact at existing and planned NSRs under mitigated scenario (Phase 1a to Phase 2 population intake after Year 2030)

ID[1]

NAP[2]

ASR

Max. Predicted Leq 30 min (Daytime), dB(A)

Max. Predicted Leq 30 min (Night-time), dB(A)

Criteria, dB(A)

Mitigation Measures Required [Y/N]

Leq 30 min[3]

Existing NSRs

N01

N01-01

N/A[4]

69

69

N/A[4]

N

Phase 1a

Planned NSRs

101

101-01, 101-03, 101-05

C

<40

<40

70/60

N

101-04 and 101-06

B

<40

<40

65/55

N

103

103-01, 103-03 to 103-05

C

53

53

70/60

N

103-06

B

42

42

65/55

N

104

104-01 to 104-04

B

<40

<40

65/55

N

107

107–01, 107–03, 107–05

C

42

42

70/60

N

107–04 and 107–06

B

<40

<40

65/55

N

108

108–01, 108–03, 108–05

C

43

43

70/60

N

108–04 and 108–06

B

<40

<40

65/55

N

110

110–01, 110–03 to 110–05

C

54

54

70/60

N

110–06

B

40

40

65/55

N

111

111-01 to 111-04

B

<40

<40

65/55

N

113

113–01, 113–03 to 113–05

C

53

53

70/60

N

113-06

B

<40

<40

65/55

N

114

114-01 to 114-04

B

<40

<40

65/55

N

116

116-01 to 116-04

B

<40

<40

65/55

N

117

117-01 to 117-04

B

<40

<40

65/55

N

118

118-01 to 118-04

B

<40

<40

65/55

N

Phase 1a to Phase 1b

119

119-01, 119-03 to 119-06

B

<40

<40

65/55

N

122

122-01, 122-03, 122-05

C

44

44

70/60

N

122-04 and 122-06

B

<40

<40

65/55

N

123

123-01, 123-03, 123-05

C

51

51

70/60

N

123-04 and 123-06

B

<40

<40

65/55

N

125

125-01, 125-03, 125-05

C

51

51

70/60

N

125-04 and 125-06

B

<40

<40

65/55

N

126

126-01, 126-03 to 126-05

C

45

45

70/60

N

126-06

B

<40

<40

65/55

N

129

129-01, 129-03, 129-05

C

<40

<40

70/60

N

129-04 and 129-06

B

<40

<40

65/55

N

130

130-01, 130-03, 130-05

C

51

51

70/60

N

130-04 and 130-06

B

<40

<40

65/55

N

132

132-01, 132-03, 132-05

C

43

43

70/60

N

132-04 and 132-06

B

41

41

65/55

N

133

133-01, 133-03, 133-05

C

41

41

70/60

N

133-04 and 133-06

B

<40

<40

65/55

N

135

135-01, 135-03, 135-05

C

<40

<40

70/60

N

135-04 and 135-06

B

<40

<40

65/55

N

801

801-01

C

57

-

70/-

N

Phase 1a to Phase 1c

136

136-01 to 136-04

B

<40

<40

65/55

 

139

139-01 to 139-04

B

<40

<40

65/55

N

140

140-01 to 140-04

B

<40

<40

65/55

N

142

142-01, 142-03 to 142-06

C

47

47

70/60

N

143

143-01, 143-03 to 143-06

C

54

54

70/60

N

146

146-01 to 146-04

C

<40

<40

70/60

N

147

147-01, 147-03 to 147-06

C

54

54

70/60

N

149

149-01 to 149-04

C

<40

<40

70/60

N

Phase 1 to Phase 2

201

201-01 to 201-03

C

57

57

70/60

N

206

206-01

C

47

47

70/60

N

207

207-01

C

44

44

70/60

N

211

211-01

C

49

49

70/60

N

212

212-01 to 212-02

C

47

47

70/60

N

215

215-01 to 215-04

C

46

46

70/60

N

501

501-01 to 501-05

C

51

-

70/-

N

802

802-01 to 802-02

C

57

-

70/-

N

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   NAP – Noise Assessment Point

[3]   The criteria are presented for [Daytime and evening time criterion / night-time criterion]. Noise criterion is proposed according to IND-TM

[4]   N/A – Not Applicable. In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR. However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

[5]   Noise criterion between 2300 – 0700 hours according to EIAO-TM.

[6]   The nearest NSR of each building to the railway is adopted for Lmax calculation to represent the worst case scenario.

Table 4.29e Predicted rail noise impact at existing and planned NSRs under mitigated scenario (Phase 1a to Phase 3 population intake after Year 2034)

ID[1]

NAP[2]

ASR

Max. Predicted Leq 30 min (Daytime), dB(A)

Max. Predicted Leq 30 min (Night-time), dB(A)

Criteria, dB(A)

Mitigation Measures Required [Y/N]

Leq 30 min[3]

Existing NSRs

N01

N01-01

N/A[4]

69

69

N/A[4]

N

Planned NSRs

Phase 1a

101

101-01, 101-03, 101-05

C

<40

<40

70/60

N

101-04 and 101-06

B

<40

<40

65/55

N

103

103-01, 103-03 to 103-05

C

53

53

70/60

N

103-06

B

42

42

65/55

N

104

104-01 to 104-04

B

<40

<40

65/55

N

107

107–01, 107–03, 107–05

C

42

42

70/60

N

107–04 and 107–06

B

<40

<40

65/55

N

108

108–01, 108–03, 108–05

C

43

43

70/60

N

108–04 and 108–06

B

<40

<40

65/55

N

110

110–01, 110–03 to 110–05

C

54

54

70/60

N

110–06

B

40

40

65/55

N

111

111-01 to 111-04

B

<40

<40

65/55

N

113

113–01, 113–03 to 113–05

C

53

53

70/60

N

113-06

B

<40

<40

65/55

N

114

114-01 to 114-04

B

<40

<40

65/55

N

116

116-01 to 116-04

B

<40

<40

65/55

N

117

117-01 to 117-04

B

<40

<40

65/55

N

118

118-01 to 118-04

B

<40

<40

65/55

N

Phase 1a to Phase 1b

119

119-01, 119-03 to 119-06

B

<40

<40

65/55

N

122

122-01, 122-03, 122-05

C

44

44

70/60

N

122-04 and 122-06

B

<40

<40

65/55

N

123

123-01, 123-03, 123-05

C

51

51

70/60

N

123-04 and 123-06

B

<40

<40

65/55

N

125

125-01, 125-03, 125-05

C

51

51

70/60

N

125-04 and 125-06

B

<40

<40

65/55

N

126

126-01, 126-03 to 126-05

C

45

45

70/60

N

126-06

B

<40

<40

65/55

N

129

129-01, 129-03, 129-05

C

<40

<40

70/60

N

129-04 and 129-06

B

<40

<40

65/55

N

130

130-01, 130-03, 130-05

C

51

51

70/60

N

130-04 and 130-06

B

<40

<40

65/55

N

132

132-01, 132-03, 132-05

C

43

43

70/60

N

132-04 and 132-06

B

41

41

65/55

N

133

133-01, 133-03, 133-05

C

41

41

70/60

N

133-04 and 133-06

B

<40

<40

65/55

N

135

135-01, 135-03, 135-05

C

<40

<40

70/60

N

135-04 and 135-06

B

<40

<40

65/55

N

801

801-01

C

57

-

70/-

N

Phase 1a to Phase 1c

136

136-01 to 136-04

B

<40

<40

65/55

N

139

139-01 to 139-04

B

<40

<40

65/55

N

140

140-01 to 140-04

B

<40

<40

65/55

N

142

142-01, 142-03 to 142-05

C

47

47

70/60

N

142-06

B

43

43

65/55

N

143

143-01, 143-03 to 143-05

C

54

54

70/60

N

143-06

B

44

44

65/55

N

146

146-01 to 146-04

B

<40

<40

65/55

N

147

147-01, 147-03 to 147-05

C

54

54

70/60

N

147-06

B

40

40

65/55

N

149

149-01 to 149-04

B

<40

<40

65/55

N

Phase 1 to Phase 2

201

201-01 to 201-03

C

57

57

70/60

N

206

206-01

C

47

47

70/60

N

207

207-01

C

44

44

70/60

N

211

211-01

C

49

49

70/60

N

212

212-01 to 212-02

C

47

47

70/60

N

215

215-01 to 215-04

C

46

46

70/60

N

501

501-01 to 501-05

C

51

-

70/-

N

802

802-01 to 802-02

C

57

-

70/-

N

Phase 1 to Phase 3

301

301-01

C

48

48

70/60

N

303

303-01 to 303-07

C

56

56

70/60

N

304

304-01

C

49

49

70/60

N

305

305-01

C

49

49

70/60

N

307

307-01 to 307-06

C

56

56

70/60

N

308

308-01

C

55

55

70/60

N

309

309-01 to 309-02

C

57

57

70/60

N

310

310-01 to 310-04

C

48

48

70/60

N

311

311-01 to 311-02

C

48

48

70/60

N

312

312-01

C

47

47

70/60

N

601

601–01 and 601–06

B

49

-

65/55

N

601–02 to 601–05, 601–07 to  601–09

C

51

-

70/-

N

803

803-01

B

<40

-

65-

N

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   NAP – Noise Assessment Point

[3]   The criteria are presented for [Daytime and evening time criterion / night-time criterion]. Noise criterion is proposed according to IND-TM

[4]   N/A – Not Applicable. In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR. However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

[5]   Noise criterion between 2300 – 0700 hours according to EIAO-TM.

[6]   The nearest NSR of each building to the railway is adopted for Lmax calculation to represent the worst case scenario.

Table 4.29f Predicted rail noise impact at existing and planned NSRs under mitigated scenario (full occupation after Year 2038)

ID[1]

NAP[2]

ASR

Max. Predicted Leq 30 min (Daytime), dB(A)

Max. Predicted Leq 30 min (Night-time), dB(A)

Criteria, dB(A)

Mitigation Measures Required [Y/N]

Leq 30 min[3]

Existing NSRs

N01

N01-01

N/A[4]

69

69

N/A[4]

N

Planned NSRs

Phase 1a

101

101-01, 101-03, 101-05

C

<40

<40

70/60

N

101-04 and 101-06

B

<40

<40

65/55

N

103

103-01, 103-03 to 103-05

C

53

53

70/60

N

103-06

B

42

42

65/55

N

104

104-01 to 104-04

B

<40

<40

65/55

N

107

107–01, 107–03, 107–05

C

42

42

70/60

N

107–04 and 107–06

B

<40

<40

65/55

N

108

108–01, 108–03, 108–05

C

43

43

70/60

N

108–04 and 108–06

B

<40

<40

65/55

N

110

110–01, 110–03 to 110–05

C

54

54

70/60

N

110–06

B

40

40

65/55

N

111

111-01 to 111-04

B

<40

<40

65/55

N

113

113–01, 113–03 to 113–05

C

53

53

70/60

N

113-06

B

<40

<40

65/55

N

114

114-01 to 114-04

B

<40

<40

65/55

N

116

116-01 to 116-04

B

<40

<40

65/55

N

117

117-01 to 117-04

B

<40

<40

65/55

N

118

118-01 to 118-04

B

<40

<40

65/55

N

Phase 1a to Phase 1b

119

119-01, 119-03 to 119-06

B

<40

<40

65/55

N

122

122-01, 122-03, 122-05

C

44

44

70/60

N

122-04 and 122-06

B

<40

<40

65/55

N

123

123-01, 123-03, 123-05

C

51

51

70/60

N

123-04 and 123-06

B

<40

<40

65/55

N

125

125-01, 125-03, 125-05

C

51

51

70/60

N

125-04 and 125-06

B

<40

<40

65/55

N

126

126-01, 126-03 to 126-05

C

45

45

70/60

N

126-06

B

<40

<40

65/55

N

129

129-01, 129-03, 129-05

C

<40

<40

70/60

N

129-04 and 129-06

B

<40

<40

65/55

N

130

130-01, 130-03, 130-05

C

51

51

70/60

N

130-04 and 130-06

B

<40

<40

65/55

N

132

132-01, 132-03, 132-05

C

43

43

70/60

N

132-04 and 132-06

B

41

41

65/55

N

133

133-01, 133-03, 133-05

C

41

41

70/60

N

133-04 and 133-06

B

<40

<40

65/55

N

135

135-01, 135-03, 135-05

C

<40

<40

70/60

N

135-04 and 135-06

B

<40

<40

65/55

N

801

801-01

C

57

-

70/-

N

Phase 1a to Phase 1c

136

136-01 to 136-04

B

<40

<40

65/55

N

139

139-01 to 139-04

B

<40

<40

65/55

N

140

140-01 to 140-04

B

<40

<40

65/55

N

142

142-01, 142-03 to 142-05

C

47

47

70/60

N

142-06

B

40

40

65/55

N

143

143-01, 143-03 to 143-05

C

54

54

70/60

N

143-06

B

40

40

65/55

N

146

146-01 to 146-04

B

<40

<40

65/55

N

147

147-01, 147-03 to 147-05

C

54

54

70/60

N

147-06

B

40

40

65/55

N

149

149-01 to 149-04

B

<40

<40

65/55

N

Phase 1 to Phase 2

201

201-01 to 201-03

C

57

57

70/60

N

206

206-01

C

47

47

70/60

N

207

207-01

C

44

44

70/60

N

211

211-01

C

49

49

70/60

N

212

212-01 to 212-02

C

47

47

70/60

N

215

215-01 to 215-04

C

46

46

70/60

N

501

501-01 to 501-05

C

51

-

70/-

N

802

802-01 to 802-02

C

57

-

70/-

N

Phase 1 to Phase 3

301

301-01

C

48

48

70/60

N

303

303-01 to 303-07

C

56

56

70/60

N

304

304-01

C

49

49

70/60

N

305

305-01

C

49

49

70/60

N

307

307-01 to 307-06

C

55

55

70/60

N

308

308-01

C

48

48

70/60

N

309

309-01 to 309-02

C

48

48

70/60

N

310

310-01 to 310-04

C

48

48

70/60

N

311

311-01 to 311-02

C

48

48

70/60

N

312

312-01

C

47

47

70/60

N

601

601–01 and 601–06

B

49

-

65/-

N

601–02 to 601–05, 601–07 to  601–09

C

51

-

70/-

N

803

803-01

B

<40

-

65/-

N

Phase 1 to Phase 4

401

401–01 to 401–04

B

<40

<40

65/55

N

403

403–01 to 403–04

B

<40

<40

65/55

N

404

404–01 to 404–04

B

<40

<40

65/55

N

407

407–01 to 407–04

B

<40

<40

65/55

N

408

408-02 to 408–18

C

60

60

70/60

N

409

409-01 to 409–18

C

57

57

70/60

N

414

414-01 to 414–15

C

52

52

70/60

N

415

415-01 to 415-02

C

50

50

70/60

N

419

419-01 to 419–13

C

51

51

70/60

N

420

420-01 to 420–19

C

51

51

70/60

N

421

421-01 to 421–17

C

51

51

70/60

N

422

422-01 to 422–12

C

57

57

70/60

N

701

701-01 to 701-08

C

54

-

70/-

N

804

804-01

B

<40

-

65/-

N

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   NAP – Noise Assessment Point

[3]   The criteria are presented for [Daytime and evening time criterion / night-time criterion]. Noise criterion is proposed according to IND-TM

[4]   N/A – Not Applicable. In accordance with Annex 13 of the EIAO-TM, country parks are considered to be a NSR. However, the EIAO-TM and IND-TM do not provide a specific noise limits for Country Parks.

[5]   Noise criterion between 2300 – 0700 hours according to EIAO-TM.

[6]   The nearest NSR of each building to the railway is adopted for Lmax calculation to represent the worst case scenario.

4.7.4.6           With the proposed mitigation measures, all the representative NSRs will be within the respective noise criterion. There would be no existing dwellings, classrooms and other noise sensitive elements that will be exposed to adverse residual noise impact exceeding the criteria set in Annex 5 in the EIAO-TM.

4.7.4.7           Table 4.15 has presented the packages of noise mitigation measures that are recommended for the current building design.  Nevertheless, depends on the evaluation during subsequent detailed design, the future developers may wish to explore any alternative approaches to achieve equivalent or even better environmental performance. During the detailed design stage, an environmental review may be conducted to study and optimise the extent of sections of canopy and noise barrier that could help to reduce the rail noise impacts to allow scope in enhancing current scheme adopted in this EIA. They would need to demonstrate that the noise criteria can still be achieved by adopting their packages of mitigation measures.

Indirect Mitigation Measures

4.7.4.8           Since direct mitigation measures are sufficient to protect the dwellings to achieve compliance of relevant criteria, indirect mitigation measures are not required.

4.7.5                  Structural-borne Rail Noise Impact

4.7.5.1           As discussed in Section 4.5.5, structural-borne rail noise impact is not anticipated under deck (reprovisioned SHD).  In addition, the TCL/AEL is operated on at-grade ballast track with no structural integration with the topside development and SHO and SHD Replanning Works, adverse structural-borne rail noise impact is not anticipated.

4.7.6                  Evaluation of Residual Rail Noise Impact

4.7.6.1           According to Section 4.7.4, all the NSRs are within the respective noise criterion, adverse residual noise impacts are therefore not anticipated.

4.7.7                  Cumulative Rail and Fixed Plant Noise Impact

4.7.7.1           Cumulative rail and fixed plant noise impact assessment has been conducted with mitigation for rail noise proposed in Section 4.5.4, Section 4.7.4 and mitigation measures proposed in the Railway EIA.

4.7.7.2           Detail calculation is shown in Appendix 4.25 and summary of the cumulative impacts are given in Table 4.30.

Table 4.30a Predicted cumulative rail and fixed plant noise impact for selected representative NSR (Phase 1)

ID[1]

NAP[2]

ASR

Max. Predicted Noise Level, dB(A)

Criteria, dB(A)

Mitigation Measures Required [Y/N]

Leq 30 min[3]

Leq 30 min[4]

103

103-01

C

61/55

70/60

N

108

108-06

C

60/55

70/60

N

110

110-01

C

59/55

70/60

N

113

113-01

C

58/54

70/60

N

116

116-01

C

56/49

70/60

N

119

119-01

B

57/50

65/55

N

119

119-06

B

57/49

65/55

N

123

123-01

C

61/54

70/60

N

136

136-04

C

62/58

70/60

N

139

139-01

C

60/51

70/60

N

142

142-06

C

62/58

70/60

N

143

143-06

C

62/54

70/60

N

149

149-03

C

65/58

70/60

N

149

149-04

C

65/55

70/60

N

Notes:                            

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   NAP – Noise Assessment Point

[3]   The maximum noise level are presented for [Daytime and evening time Leq 30 min / night-time Leq 30 min].

[4]   The criteria are presented for [Daytime and evening time criterion / night-time criterion]. Noise criterion is proposed according to IND-TM.

Table 4.30b Predicted cumulative rail and fixed plant noise impact for selected representative NSR (Phase 1 to 2)

ID[1]

NAP[2]

ASR

Max. Predicted Noise Level, dB(A)

Criteria, dB(A)

Mitigation Measures Required [Y/N]

Leq 30 min[3]

Leq 30 min[4]

103

103-01

C

61/55

70/60

N

108

108-06

B

57/47

65/55

N

110

110-01

C

58/55

70/60

N

113

113-01

C

58/54

70/60

N

116

116-01

B

56/46

65/55

N

119

119-01

B

57/50

65/55

N

119

119-06

B

57/49

65/55

N

123

123-01

C

61/54

70/60

N

136

136-04

B

57/47

65/55

N

139

139-01

B

59/49

65/55

N

142

142-06

C

59/50

70/60

N

143

143-06

C

61/50

70/60

N

149

149-03

C

63/50

70/60

N

149

149-04

C

63/49

70/60

N

Notes:

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   NAP – Noise Assessment Point

[3]   The maximum noise level are presented for [Daytime and evening time Leq 30 min / night-time Leq 30 min].

[4]   The criteria are presented for [Daytime and evening time criterion / night-time criterion]. Noise criterion is proposed according to IND-TM.

Table 4.30c Predicted cumulative rail and fixed plant noise impact for selected representative NSR (Phase 1 to Phase 3)

ID[1]

NAP[2]

ASR

Max. Predicted Noise Level, dB(A)

Criteria, dB(A)

Mitigation Measures Required [Y/N]

Leq 30 min[3]

Leq 30 min[4]

103

103-01

C

61/55

70/60

N

108

108-06

B

57/47

65/55

N

110

110-01

C

58/55

70/60

N

113

113-01

C

58/54

70/60

N

116

116-01

B

56/46

65/55

N

119

119-01

B

57/50

65/55

N

119

119-06

B

57/49

65/55

N

123

123-01

C

61/54

70/60

N

136

136-04

B

57/47

65/55

N

139

139-01

B

59/49

65/55

N

142

142-06

B

58/49

65/55

N

143

143-06

B

57/49

65/55

N

149

149-03

B

58/48

65/55

N

149

149-04

B

56/46

65/55

N

Notes:                            

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   NAP – Noise Assessment Point

[3]   The maximum noise level are presented for [Daytime and evening time Leq 30 min / night-time Leq 30 min].

[4]   The criteria are presented for [Daytime and evening time criterion / night-time criterion]. Noise criterion is proposed according to IND-TM.

Table 4.30d Predicted cumulative rail and fixed plant noise impact for selected representative NSR (full occupation after Phase 4)

ID[1]

NAP[2]

ASR

Max. Predicted Noise Level, dB(A)

Criteria, dB(A)

Mitigation Measures Required [Y/N]

Leq 30 min[3]

Leq 30 min[4]

103

103-01

C

61/55

70/60

N

108

108-06

B

57/47

65/55

N

110

110-01

C

58/55

70/60

N

113

113-01

C

58/54

70/60

N

116

116-01

B

56/46

65/55

N

119

119-01

B

57/50

65/55

N

119

119-06

B

57/49

65/55

N

123

123-01

C

61/54

70/60

N

136

136-04

B

57/47

65/55

N

139

139-01

B

59/49

65/55

N

142

142-06

B

58/49

65/55

N

143

143-06

B

57/48

65/55

N

149

149-03

B

57/47

65/55

N

149

149-04

B

55/45

65/55

N

407

407-01

B

53/44

65/55

N

422

422-07

C

60/58

70/60

N

Notes:                            

[1]   The assessment only includes NSRs which rely on opened windows for ventilation.

[2]   NAP – Noise Assessment Point

[3]   The maximum noise level are presented for [Daytime and evening time Leq 30 min / night-time Leq 30 min].

[4]   The criteria are presented for [Daytime and evening time criterion / night-time criterion]. Noise criterion is proposed according to IND-TM.

4.7.7.3           Table 4.15 has presented the packages of noise mitigation measures that are recommended for the current building design. Nevertheless, depends on the evaluation during subsequent detailed design, the future developers may wish to explore any alternative approaches to achieve equivalent or even better environmental performance. They would need to demonstrate that the noise criteria can still be achieved by adopting their packages of mitigation measures.

4.8                         Helicopter Noise Assessment

4.8.1                  Helicopter Noise Impact Assessment Methodology

4.8.1.1           Helicopter noise is considered as a ‘point’ source and has been evaluated based on standard acoustic principle of point source propagation. Corrections have been applied for the distance attenuation, façade, barrier or topographical effect where applicable. Agreement with the Director on the methodology and computational model has been obtained prior to the commencement of the assessment.

4.8.2                  Identification of Helicopter Noise Impact

Identification of Assessment Area and Noise Sensitive Receivers

4.8.2.1           For helicopter noise assessment, the assessment area includes those within 130m from site boundary (see Appendix 4.26 for the assessment area determination). Representative Planned NSRs have been selected from Table 4.8 and are summarised in the table below and illustrated in Figure 4.10. Agreement with the Director on the assessment area and noise assessment points has been obtained prior to the commencement of the assessment.

Table 4.31 Representative planned NSRs for helicopter noise assessment

ID[1]

Uses[2]

No. of Domestic Storey

NAP[3][4]

119

R

15

119-01

201

R

16

201-03

217

R

19

217-01

309

R

22

309-03

315

R

20

315-01

410

R

22

410-01

422

R

22

422-07

802

E

1

802-02

Notes:

[1]   The assessment only includes include NSRs which rely on opened windows for ventilation.

[2]   R – Residential Premises, E – Educational Institutions

[3]   NAP – Noise Assessment Point.

[4]   First layer of NSRs within 130m assessment area is included. Appendix 4.26 shows the assessment area determination.

Inventory of Noise Sources

4.8.2.2           As discussed in Section 4.2.3, the existing helicopters of GFS (Super Puma AS332 and EC 155 B1) will be replaced by Airbus Helicopter H175. In addition, MD 902 Explorer will be used for flight between HKIA and Kowloon, AgustaWestland AW139, Sikorsky S-76 and Sikrosky S-92A will be used for flight between HKIA and Macau, HKIA and China respectively. Therefore, it is anticipated that only Airbus Helicopter H175 and MD 902 Explorer would travel along the north coast of Lantau near the proposed development.

4.8.2.3           The helicopter noise source term based on the Flight Manual Airbus Helicopter H175, Technical Description MD902 Explorer have been confirmed with GFS and relevant parties.

4.8.2.4           The International Civil Aviation Organisation (ICAO) has a stipulated reference noise standard for helicopters with lateral movement for different flying modes including approach, take-off and flyover. Besides, Type-Certificate Data Sheet for Noise Airbus Helicopter H175 and Technical Description MD 902 Explorer have presented a measured noise level for the types of helicopters of concern. A comparison of the measured noise levels to the maximum limit as specified in the ICAO are shown in table below. Agreement with the Director on the information of the helicopter noise characteristics has been obtained prior to the commencement of the assessment.

Table 4.32 Helicopter noise data with lateral movements

Flying Mode

EPN, dB

MD 902

H175

[1]

[2]

[1]

[2]

Approach

89.6

95.3

95.1

98.8

Take-off

85.4

94.5

89.8

95.8

Flyover

83.5

93.3

91.0

93.8

Notes:

[1]   Measured noise levels according to the European Aviation Safety Agency Type-Certificate Data Sheet of Airbus Helicopter H175 and Technical Description MD 902 Explorer.

[2]   ICAO reference limit.

[3]   Lmax = EPNdB-13, with reference to “Transportation Noise Reference Book” (Nelson, 1987), Equation (6a) “Conversion Relationship of Aircraft Noise Indices between WECPNL and DENL” (Proceedings of 20th International Congress of Acoustics), Section 2.1 “Consideration to noise index for evaluating airport noise in Japan” (The 33rd International Congress and Exposition on Noise Control Engineering) and Section 2 “Evaluation and Prediction of Airport Noise in Japan” (Journal of the Acoustical Society of Japan).

4.8.2.5           The GFS helipad and HKBAC on Airport Island are about 7km away from the proposed development. Due to the large separation distance from the proposed development, helicopter noise impact will be mainly generated by flyover mode.

4.8.2.6           Under normal operation, Silvermine is the normal helicopter entry exit route from the HKIA during day-time, evening period and night-time. Aerodrome Traffic Zone (ATZ) via the Visual Flight Rules (VFR) Holding Area at Pak Mong, which is about 500m west of SHD. Therefore, helicopter will flyover outside the 130m assessment area and helicopter noise impacts are not anticipated. Under adverse weather, however, the helicopter from GFS would need to fly along North Lantau Expressway (NLE), which will be altered after implementation of Topside development, at an average height of approximately 500 feet (approx. 150m) above mean sea level and 130m north of SHD flight corridor along the coastline of North Lantau between Pak Mong and the Toll Plaza of the Tsing Ma Bridge. In addition, as advised by CAD, a helicopter shall not fly closer than 500 feet (approx. 150m) to any person, vessel, vehicle or structure. Therefore, helicopter shall not fly closer than 150m under adverse weather or for emergency uses at night-time. With Airbus Helicopter H175 (EPD, 93.8dB under flyover mode) at 150m separation from SHD and according standard acoustic principle of point source attenuation, Lmax would be less than 85dB(A) including 3dB(A) facade correction which is within the helicopter noise criteria.

4.8.2.7           As discussed in Section 4.2.3.11, the partial relocation of GFS emergency flying services to a forward base is still yet to be finalized. Hence, the helicopter noise impact assessment is still based on the worst case scenario on flyover mode (i.e. Airbus Helicopter H175). To provide sufficient setback distance for achieving the Lmax 85 dB(A) noise criterion, 130m away from the flight route for the routine services under normal condition (see Appendix 4.26). As sufficient setback distance is allowed, potential helicopter noise impacts are not anticipated.

4.8.3                  Prediction and Evaluation of Helicopter Noise Impact

Scenarios

4.8.3.1           The helicopter noise impact assessment of the Project is conducted with respect to the proposed criteria and EPD agreement of unmitigated scenario and mitigated scenario on the worst operation mode (i.e. flyover mode with helicopter type Airbus Helicopter H175 with maximum noise emission) representing the maximum noise emission. The operation modes have been confirmed with GFS. Agreement with the Director on the operation mode has been obtained prior to the commencement of the assessment.

Prediction of Noise Impact

4.8.3.2           The predicted helicopter noise levels at the representative NSRs are shown in table below. Details are provided in Appendix 4.27.

Table 4.33 Predicted helicopter noise impacts

ID[1]

Uses[2]

NAP

[3][4]

Criteria, Lmax dB(A)

Max. Predicted Daytime Lmax, dB(A) [5]

Exceedance

[Y/N]

119

R

119-01

85

84

N

201

R

201-03

85

84

N

217

R

217-01

85

84

N

309

R

309-03

85

84

N

315

R

315-01

85

84

N

410

R

410-01

85

84

N

422

R

422-07

85

84

N

802

E

802-02

85

84

N

Notes:

[1]   The assessment only includes include NSRs which rely on opened windows for ventilation.

[2]   R – Residential Premises, E – Educational Institutions

[3]   NAP – Noise Assessment Point

[4]   First layer of NSRs within 130m assessment area is included. Appendix 4.26 shows the assessment area determination.

[5]   Bolded values mean exceedance of the relevant noise criteria.

4.8.3.3           The maximum predicted noise levels at concerned NSRs is 84dB(A) as shown in Table 4.33. From the above table, all planned NSRs will be within daytime noise criteria of Lmax 85dB(A). The Lmax contour is shown in Appendix 4.27. Since there is no relevant noise criteria in the EIAO-TM and overseas / international guidelines applicable to emergency helicopter operation in the in evening and night-time periods, the helicopter noise impact during evening and night-time periods would not be quantitatively assessed. Furthermore, night-time operation is only expected for emergency uses, and the flight-path along Silvermine will be taken unless during adverse weather. As discussed above, helicopter will not fly closer than 150m during adverse weather. Adverse helicopter noise impacts are not anticipated.

4.8.4                  Mitigation of Helicopter Noise Impact

Direct Mitigation Measures

4.8.4.1           As discussed above, the maximum predicted noise levels would be 84dB(A) and comply with relevant noise criteria. Therefore, direct mitigation measures are not required.

Indirect Mitigation Measures

4.8.4.2           As discussed above, the maximum predicted noise levels would be 84dB(A) and comply with relevant noise criteria. Therefore, indirect mitigation measures are not required.

4.8.5                  Evaluation of Residual Helicopter Noise Impact

4.8.5.1           Adverse helicopter noise impacts are not expected and adverse residual noise impacts are therefore not anticipated.

4.9                         Marine Traffic Noise Assessment

4.9.1.1           As discussed in Section 2, there is no statutory requirement for marine traffic noise. The construction of the Project would not require any marine works and hence construction vessels for marine works are not anticipated. Besides, there are neither existing nor planned marine routes within the 300m assessment area. Agreement with the Director on the assessment has been obtained prior to the commencement of the assessment.  Hence, marine traffic noise impacts are not anticipated during both construction and operational phases.

4.10                   Noise Implications Caused by Elements to be Implemented by SHO and SHD Replanning Works

4.10.1.1      As discussed in Section 1.3, the latest implementation strategy has recommended the following items in EIA Study Brief ESB-296/2016 will be separately implemented by the SHO and SHD Replanning Works project which will be addressed in the Railway EIA.

·               Railway depot replanning works within the existing site boundary;

·               Podium deck and property enabling works for the topside development;

·               A new SHO, as well as local access roads and emergency vehicular access (EVA); and

·               Provision of the sewerage network with sewage pumping station to cater sewage generated by SHO and SHD Replanning Works.

4.10.1.2      According to Railway EIA findings and recommendations, all the practicable measures to avoid, minimise and mitigate the noise generated from the SHO and SHD Replanning Works have been exhausted. The Railway EIA has also recommended a series of mitigation measures similar to those as described in Section 4.3.4, Section 4.4.4, Section 4.5.4, and Section 4.7.4 for implementation.  The Railway EIA has concluded that, with the implementation of those mitigation measures, adverse noise implications are not anticipated.

4.11                   Conclusion

4.11.1             Construction Phase

4.11.1.1      Construction noise impact assessment associated with the use of Powered Mechanical Equipment (PME) for different phases of construction has been conducted. With the implementation of practical mitigation measures including good site management practices, use of movable noise barrier and full enclosure, use of “quiet” plant and working method, construction noise impacts at all representative planned residential noise sensitive uses would be controlled to acceptable levels. For the representative planned educational institutions, the construction noise impacts during school normal and examination periods would also comply with the relevant criteria. Although there are no criteria for country parks, the mitigated noise levels are predicted to be low at the selected assessment points and adverse construction noise impacts are therefore not anticipated.

4.11.2             Operational Phase

4.11.2.1      Operation road traffic noise impacts on planned and existing noise sensitive uses within 300m assessment area have been predicted. Results indicate that the noise impacts on representative planned NSRs can be mitigated by a combination of noise mitigation measures including acoustic windows, fixed glazing and arrangement of noise tolerant use in some buildings to within the respective noise criteria. Therefore, adverse road traffic noise impacts are not anticipated.

4.11.2.2      Fixed noise assessment has been conducted. Noise impact from planned fixed plant could be effectively mitigated by implementing noise control measure at source during project implementation stage. With the adoption of the proposed maximum permissible SWLs for the proposed fixed plant, the noise levels at representative planned NSRs due to both the existing and planned fixed plants complies with the relevant noise criteria. For existing NSR (i.e. Lantau North (Extension) Country Park), the predicted noise level due to both the existing and planned fixed plants is 59 dB(A). Given the transient nature of visitor using hiking trails, adverse fixed noise sources impacts are not anticipated.

4.11.2.3      According to the approved 3RS EIA (AEIAR-185/2014) findings, the predicted NEF 25 contours of the 3Rs would be away from site boundary in Year 2011, Year 2021, Year 2030 and Year 2032. Adverse aircraft noise impacts are not anticipated. Although not under the statutory requirements, the use of acoustic insulation in form of well-gasketted window to enhance the indoor living environment would be reviewed in the detailed design stage, as mentioned in Section 2.4.3.13 of this report.

4.11.2.4      Rail noise assessment has been conducted. Rail noise impacts from shunting tracks entering/ leaving from SHD are anticipated, rail noise impact assessment results indicate that the noise impacts on NSRs would comply with the statutory requirements with noise mitigation measure including sections of canopy along the podium edge. For existing NSR (i.e. Lantau North (Extension) Country Park), the predicted noise level is 69 dB(A). Given the transient nature of visitor using hiking trails, adverse rail noise impacts are not anticipated.

4.11.2.5      Cumulative fixed and rail noise assessment has been conducted. With the implementation of the recommended mitigation measures, cumulative fixed and rail noise impacts on NSRs would comply with the relevant noise criteria.

4.11.2.6      Helicopter noise impacts on the planned noise sensitive uses have been predicted. According to the latest information, the flight path of helicopters would maintain sufficient separation distance from noise sensitive uses. Adverse helicopter noise impacts are not anticipated.

4.11.2.7      Since there is no existing and planned marine route within the 300m assessment area, marine traffic noise impacts are not anticipated.

 


[1] Phase 1 is sub-divided into Phase 1a, Phase 1b and Phase 1c. In view of the curvative design of the building layout for Block 101 and the modified layout for Block 118, noise exceedances for these two blocks during Phase 1a and Phase 1b are not anticipated before Phase 1c population intake. Therefore, the entire Phase 1 (i.e. Phase 1a to Phase 1c) is considered representative to present the predicted noise levels for its sub-divided phases.