TABLE OF CONTENTS

4 Airborne noise impact. 4-1

4.1 Introduction. 4-1

4.2 Environmental Legislation, Standards, and Guidelines. 4-1

4.3 Description of Existing Environment 4-4

4.4 Noise Sensitive Receivers. 4-6

4.5 Construction Phase. 4-17

4.6 Operational Phase - Fixed Plant Noise Impact Assessment 4-30

4.7 Operational Phase - Rail Noise Impact Assessment 4-55

4.8 Environmental Monitoring and Audit Requirement 4-56

4.9 Conclusion. 4-56

List of Tables

Table 4.1 Noise Criteria for Daytime Construction Noise. 4-2

Table 4.2 Construction Noise Criteria during Restricted Hours. 4-3

Table 4.3 Acceptable Noise Levels for Airborne Rail Noise. 4-3

Table 4.4 Acceptable Noise Levels for Fixed Noise Source. 4-4

Table 4.5 Representative NAPs for Construction Noise Impact Assessment 4-6

Table 4.6 Representative NAPs for Operational Noise - Fixed Plant Noise Impact Assessment 4-10

Table 4.7 Summary of Unmitigated Construction Noise Levels. 4-20

Table 4.8 Summary of Mitigation Measures adopted for PMEs. 4-25

Table 4.9 Summary of Mitigated Construction Noise Levels. 4-27

Table 4.10 Predicted Maximum Allowable SWL for Planned Noise Source. 4-33

List of Figures

C1603/C/NOL/ACM/M52/301	Locations of Prevailing Background Noise Measurement
C1603/C/NOL/ACM/M52/302	Location of Prevailing Background Noise Measurement (Tin Shui Wai, near Wetland Seasons Park Phase 1)
C1603/C/NOL/ACM/M52/310 to C1603/C/NOL/ACM/M52/323	Locations of Noise Sensitive Receivers (Existing)
C1603/C/NOL/ACM/M52/330 to C1603/C/NOL/ACM/M52/339	Locations of Noise Sensitive Receivers (Planned)
C1603/C/NOL/ACM/M52/351 to C1603/C/NOL/ACM/M52/362	Locations of Representative Noise Assessment Points (Construction Noise)
C1603/C/NOL/ACM/M52/390 to C1603/C/NOL/ACM/M52/402	Locations of Representative Noise Assessment Points (Fixed Plant Noise)

List of Appendices

Appendix 4.1	Prevailing Background Noise Measurement
Appendix 4.2	Proposed Fixed Plant Noise Criteria for NSRs
Appendix 4.3	Existing NSRs to be Removed or Resumed
Appendix 4.4	Photographs of Selected Representative Noise Sensitive Receivers
Appendix 4.5	SWLs of PMEs
Appendix 4.6	Detailed PME Inventory
Appendix 4.7	Locations of Workfronts for Construction
Appendix 4.8	Unmitigated Construction Noise Calculation
Appendix 4.9	Sketch of Typical Temporary Noise Barrier & Enclosure
Appendix 4.10	Mitigated Construction Noise Calculation
Appendix 4.11	Fixed Plant Noise Calculation
Appendix 4.12	Fixed Plant Noise Measurement at Existing KSR Station
Appendix 4.13	Predicted Fixed Plant Noise Levels at the NSRs at Representative Floor Levels
Appendix 4.14	Locations of Noise Canopy and Elevation of NTD

4 Airborne noise impact

4.1 Introduction

4.1.1 Potential airborne noise impacts likely arising from both the construction and operational phases of the Project were evaluated in this section. Recommendations on noise mitigation measures were also made where necessary and appropriate.

4.2 Environmental Legislation, Standards, and Guidelines

General

4.2.1 Noise impacts were assessed in accordance with Annexes 5 and 13 of the Technical Memorandum on Environmental Impact Assessment Process (EIAO-TM) and the Project Study Brief (i.e. ESB-346/2021).

4.2.2 The Noise Control Ordinance, Cap. 400 (NCO) and Environmental Impact Assessment Ordinance, Cap. 499 (EIAO) provide the statutory framework for noise control. Assessment procedures and standards are set out in the following Technical Memoranda (TMs):

· Technical Memorandum on Environmental Impact Assessment Process (EIAO-TM);

· Technical Memorandum for the Assessment of Noise from Places other than Domestic Premises, Public Places or Construction Sites (IND-TM);

· Technical Memorandum on Noise from Construction Work in Designated Areas (DA-TM);

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

· Technical Memorandum on Noise from Percussive Piling (PP-TM).

4.2.3 Percussive piling is governed under the PP-TM and a construction noise permit (CNP) is required in order to carry out such work. As the issuance of a CNP by the Noise Control Authority (NCA) would depend on the compliance of percussive piling noise impact with the limits set out within the PP-TM, in addition to no percussive piling works required during the construction of the Project, the assessment of this type of noise was not covered in the EIA Report.

Construction Noise Criteria during Non-restricted Hours

4.2.4 There is no statutory limit on construction noise during non-restricted hours (i.e. 0700 – 1900 hours of any day not being a Sunday or general holiday) under NCO and related TMs. Nevertheless, the EIAO-TM promulgated under the EIAO imposes noise criteria to ensure a better environment. Daytime general construction works (excluding percussive piling) between the 0700 – 1900 hours on weekdays, is controlled under the EIAO-TM. Annex 5 of the EIAO-TM sets out the construction noise assessment limits, which are L_{eq(30 min)} 75 dB(A) for domestic premises, hotels and hostels; and L_{eq(30 min)} 70 dB(A) for schools during normal hours (L_{eq(30 min)} 65 dB(A) during examination periods) and all other places where unaided voice communication is required. The noise criteria are summarised in Table 4.1.

Table 4.1 Noise Criteria for Daytime Construction Noise

Uses^(1)	Daytime (0700 to1900 hours on any day not being a Sunday or general holiday) (Leq, 30min, dB(A))
All domestic premises including temporary housing accommodation	75
Hotels and hostels	75
Educational institutions (including kindergartens, nurseries and all others where unaided voice communication is required	70 65 (During examinations)

Notes:

(1) The above standards apply to uses which rely on opened windows for ventilation.

(2) The above standards shall be viewed as the maximum allowable noise levels assessed at 1m from the external façade.

Construction Noise Criteria during Restricted Hours

4.2.5 The NCO 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.

4.2.6 In addition to the general controls on the use of PME during restricted hours, the use of Specified Powered Mechanical Equipment (SPME) and the undertaking of Prescribed Construction Work (PCW) within a designated area during the restricted hours would require a CNP and are controlled by the DA-TM. The SPME defined under the DA-TM includes hand-held breaker, bulldozer, concrete lorry mixer, dump truck and hand-held vibratory poker, while the PCW includes the erection or dismantling of formwork or scaffolding; hammering; and loading, unloading or handling of rubble, wooden boards, steel bars, wood or scaffolding material. The DA-TM details the procedures adopted by EPD for assessing the use of SPME and/or the undertaking of PCW within a designated area during restricted hours and for determining whether a CNP would be issued. As defined in the Noise Control Designated Area Plan No. EPD/AN/NT-01, some construction area of the Project would fall within the Designated Area (DA).

4.2.7 A CNP may be granted in cases where the noise can be contained within the Acceptable Noise Level (ANL) at the noise sensitive receivers (NSRs).  ANLs are assigned depending upon the Area Sensitivity Rating (ASR).  The corresponding basic noise levels (BNLs) for the evening and night-time periods are given in Table 4.2.

Table 4.2 Construction Noise Criteria during Restricted Hours

Time Period	BNL During Restricted Hours (Leq, 5min, dB(A))^(1)
	ASR ‘A’	ASR ‘B’	ASR ‘C’
All days during the evening (1900 to 2300 hours), and general holidays (including Sundays) during the daytime and evening (0700 to 2300 hours)	60 (45)	65 (50)	70 (55)
All days during the night-time (2300 to 0700 hours)	45 (30)	50 (35)	55 (40)

Note:

(1) Figures in brackets are BNLs for SPME within the designated area.

4.2.8 As defined in the Noise Control Designated Area Plan No. EPD/AN/NT-01, the works sites at Shui Mei Road, Pok Wai, Long Ha, Yau Tam Mei Tsuen and Shek Wu Wai San Tsuen, etc. are within the DA.

4.2.9 Despite any description or assessment made in this EIA Report on construction noise aspects, 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. It will also take into account contemporary conditions/ situations of adjoining land uses and any previous complaints against construction activities at the site before deciding whether to grant a CNP.  Nothing in the EIA Report should bind the Noise Control Authority in making its decision.  If a CNP is to be issued, the Noise Control Authority should include in the permit any condition it thinks fit.  Failure to comply with any such conditions will lead to cancellation of the CNP and prosecution under the NCO.

Operational Noise – Airborne Rail Noise

4.2.10 The EIAO-TM and IND-TM stipulate the appropriate ANL for airborne rail noise.  The ANLs are dependent on ASR of the NSR and are shown in Table 4.3.  The EIAO-TM also specifies the maximum rail noise limit of L_max 85 dB(A) between 2300 and 0700 hours.

Table 4.3 Acceptable Noise Levels for Airborne Rail Noise

Time Period	Noise Criteria (Leq, 30min, dB(A))
	ASR ‘A’	ASR ‘B’	ASR ‘C’
Daytime and Evening (0700 to 2300 hours)	60	65	70
Night-time (2300 to 0700 hours)	50	55	60

4.2.11 The NOL alignment would be located underground except a short trough section at the tunnel portal connecting to Ngau Tam Mei Depot (NTD). The NTD has been designed with concrete deck and vertical walls to avoid noise nuisance to the NSRs nearby from train operation within NTD. The depot openings have been minimized as far as practicable. In addition, the internal surfaces of NTD would be lined with noise absorption materials with due consideration of engineering and operation constraints to further minimise the noise nuisance. The short trough section has also been minimised as far as practicable and would also be covered by noise canopies with natural ventilation feature. With such design, there would be no direct line of sight from any NSRs to the airborne railway noise sources.

4.2.12 For maintenance trains depart and return to the NTD between 2300 and 0700 hours, these will be used to support maintenance operations in the transporting of personnel and plant for inspection and remedial works. The night-time train noise from maintenance trains would be governed by CNP under NCO and hence would not be quantified in this EIA study.

Operational Noise – Fixed Plant Noise

4.2.13 Fixed noise sources associated with the Project are controlled by the NCO and IND-TM.  The ANL is a function of the type of area within which the NSRs are located, and the degree of the effect on the NSRs of influencing factors such as major roads and industrial areas.

4.2.14 More stringent criteria for planned fixed plant noise impact stipulated in the EIAO-TM for planning purposes are as follows.

· 5 dB(A) below the appropriate ANL set out in the IND-TM; or

· prevailing background noise level where the prevailing background noise level is 5 dB(A) below the appropriate ANL (i.e. ANL – 5 dB(A)).

4.2.15 The ANLs for different time periods are given in Table 4.4. In any event, the Area Sensitivity Rating assumed in the EIA Report is for indicative assessment only. Therefore, the Noise Control Authority shall determine noise impact from concerned fixed noise sources on the basis of prevailing legislation and practices being in force, and taking account of contemporary conditions/situations of adjoining land uses. Nothing in the EIA study shall bind the Noise Control Authority in the context of law enforcement against any of the fixed noise sources being assessed.

Table 4.4 Acceptable Noise Levels for Fixed Noise Source

Time Period	ANL, dB(A)			ANL-5, dB(A)
	ASR ‘A’	ASR ‘B’	ASR ‘C’	ASR ‘A’	ASR ‘B’	ASR ‘C’
Daytime and Evening (0700 to 2300 hours)	60	65	70	55	60	65
Night (2300 to 0700 hours)	50	55	60	45	50	55

4.3 Description of Existing Environment

4.3.1 The Project is located in the northern part of the New Territories where majority of the area is predominantly in rural nature. The underground alignment would pass through a large area of wetlands, agricultural lands, private lots, brown field sites, village developments and low-density residential developments. There are also numerous planned housing developments located within and in the vicinity of the assessment area such as public housing developments at Kam Tin South, public housing development near Sha Po Tsuen, as well as the new development areas at Kwu Tung, San Tin and Ngau Tam Mei.

4.3.2 The existing noise climate in the vicinity of the Project area is dominated by the road traffic noise from Tsing Long Highway, San Tin Highway and Fanling Highway, as well as the rail noise from TML at Kam Tin area. In addition, isolated industrial operations scattered throughout the Project area also contribute to the overall ambient noise levels. These operations include open storage facilities, warehouse, container back-up areas and car stripping/repair workshops.

Prevailing Background Noise Measurement

4.3.3 According to the latest information provided by MTR Corporation, the fixed plant noise sources of the Project would be located at stations, ancillary buildings (ABs), and NTD. Background noise measurements were conducted at various locations in the vicinity of the Project to obtain prevailing background noise levels during weekday and weekend.

4.3.4 In accordance with IND-TM, sound level meter in compliance with International Electrotechnical Commission Publications 651:1979 (Type 1) and 804:1985 (Type 1) specifications were used for carrying out the noise measurement. Immediately prior to and following each noise measurement, the accuracy of sound level meter was checked using an acoustic calibrator generating 94dB at 1000 Hz. Measurement was considered to be valid with the calibration level from before and after the noise measurement within 1.0 dB(A).

4.3.5 Prevailing background noise was measured in L90 (1hr). During the noise measurement, the following procedures were followed:

· Parameters such as frequency weighting, the time weighting and the duration of measurement were set as follows:

- Frequency weighting: A

- Time weighting: Fast

- Duration of measurement: at least 24 hours continuously to cover both daytime and night-time periods (with data being logged at every one second)

· Noise measurements were conducted in accordance with standard acoustic principles and practices in the relation to weather conditions.

4.3.6 For the measurement conducted under free-field condition, a façade correction of +3dB(A) was added to the measurement result to account the façade reflection effect.

4.3.7 For the prevailing background noise within future KTN NDA, reference was made to Table 4.15 of the approved EIA report for North East New Territories New Development Areas (NENT NDA) (Register No.: AEIAR-175/2013).

4.3.8 For simulation of the future conditions at SAT and NTM NDAs, background noise measurement was conducted at Tin Shui Wai (near Wetland Seasons Park Phase 1), where are located in the same type of area “Area other than those above” with prevailing background dominated by road traffic on Wetland Park Road, for determination of comparable background noise at these NDAs. Noise climate of future San Tin / Lok Ma Chau Development Node (STLMC DN) with SAT Station will be dominated by planned District Distributor roads (i.e. Road D1), similar to the condition at Wetland Season Park of which the noise climate is dominated by Wetland Park Road. As both planned Road D1 and Wetland Park Road are classified as District Distributor Road, the prevailing background noise measured near Wetland Season Park is considered representative to that of future SAT Station area. Similarly, it is anticipated that the noise climate at the area to the south of NTD would be dominated by future road network within the area under Land Use Review Study for Ngau Tam Mei Area (NTM LUR). Although the road category of the planned road is not available in this stage, the scale of the road is expected to be similar to Wetland Park Road. Hence, the prevailing background noise within NTM LUR area is expected to be similar to Wetland Season Park, and the prevailing background noise measured near Wetland Season Park is considered also representative to that of area to the south of NTD.

4.3.9 Locations of the prevailing background noise measurement are shown in Figure Nos. C1603/C/NOL/ACM/M52/301 to 302. The prevailing noise measurement results and measurement details is presented in Appendix 4.1.

4.3.10 Based on the measurement results in Appendix 4.1, appropriate noise criteria for planned fixed noise sources were determined by comparing the prevailing background noise levels and the appropriate ANL-5 dB(A). The proposed fixed plant noise criteria for different NSRs are summarised in Appendix 4.2.

4.4 Noise Sensitive Receivers

4.4.1 The assessment area for the noise impact assessment was set as 300m from the boundary of the Project and the works areas/works sites. With reference to the criteria set out in Annex 13 of EIAO-TM, observations from site visits and review of relevant land use plans including the Outline Zoning Plans (OZP), Development Permission Area Plans, Outline Development Plans, Layout Plans and other relevant published land use plans, including plans and drawings published by the Lands Department and any land use and development applications approved by the Town Planning Board, representative existing and planned NSRs, within 300m assessment area of the Project boundary were identified. All NSRs within the assessment area are shown in Figure Nos. C1603/C/NOL/ACM/M52/310 – 323 and C1603/C/NOL/ACM/M52/330 – 339.

4.4.2 Some of the existing NSRs, that are close to the Project, would be removed / resumed by the Project or other concurrent projects according to the respective construction programme provided by the project proponent, and thus these NSRs, as listed in Appendix 4.3, would not be considered in the noise impact assessment.

4.4.3 Representative NSRs located closest to the subject noise sources, i.e. first layer of NSRs, are considered the most affected locations.  Furthermore, the first layer of NSRs would provide acoustic shielding to those receivers at further distance behind.  The first layer of NSRs represents the worst-case scenario and are selected as representative Noise Assessment Point (NAPs) for noise assessment.   A summary of representative NAPs, including the planned/committed and existing NSRs, for different noise impact assessments is presented in Table 4.5 and Table 4.6 respectively with their locations shown in Figure Nos. C1603/C/NOL/ACM/M52/351 – 362 and C1603/C/NOL/ACM/M52/390 – 402. Photographs of representative NSRs are shown in Appendix 4.4.

Table 4.5 Representative NAPs for Construction Noise Impact Assessment

NAP ID	Description	Land Use ^(1)	Existing / Planned	No. of Storey
PHD-E1	11D Shek Wu Tong	R	Existing	2
PHDKSR-E1	2 Shek Wu Tong	R	Existing	2
PHDKSR-P1	Planned Residential Block at Kam Tin South Housing Development	R	Planned	N/A ^(2)
PHDKSR-P2	Planned Residential Block at Kam Tin South Housing Development	R	Planned	N/A ^(2)
PHDKSR-P3	Planned Residential Block at Kam Tin South Housing Development	R	Planned	N/A ^(2)
KSR-P1	Planned Residential Block at Kam Tin South Housing Development	R	Planned	N/A ^(2)
KSR-P2	Planned G/IC Site at Kam Tin South Housing Development^(3)	G/IC	Planned	N/A ^(2)
KSR-P3	Planned G/IC Site at Kam Tin South Housing Development	G/IC	Planned	N/A ^(2)
KSR-P4	Planned Residential Block at Kam Tin South Housing Development	R	Planned	N/A ^(2)
KSR-P5	Grand Mayfair	R	Planned	16
KSR-P6	Grand Mayfair	R	Planned	16
KSR-P7	Grand Mayfair	R	Planned	16
KSR-P8	Planned School Site at Kam Tin South Housing Development	E	Planned	N/A ^(2)
KSR-E1	230 Kat Hing Wai	R	Existing	3
SMR-E1	Tower 8B, Park Yoho	R	Exiting	14
SMR-E2	Tower 1A, Park Yoho	R	Existing	14
AUT-E1	Shum Residence	R	Existing	2
AUT-E2	26 Mo Fan Heung	R	Existing	1
AUT-P1	Planned Residential Block at Sha Po Public Housing Development	R	Planned	N/A ^(2)
AUT-P2	Planned Residential Block at Sha Po Public Housing Development	R	Planned	N/A ^(2)
AUT-P3	Planned Residential Block at Sha Po Public Housing Development	R	Planned	N/A ^(2)
POW-E1	166 Pok Wai	R	Existing	2
POW-E2	171A Pok Wai	R	Existing	1
POW-E3	169 Pok Wai	R	Existing	2
POW-E4	170 Pok Wai	R	Existing	3
LHT-E1	Village House in Long Ha	R	Existing	1
NTM-E1	Hongtai Home for the Aged Limited	HA	Existing	3
NTM-E2	Village House in Yau Tam Mei Tsuen	R	Existing	2
NTM-E3	Temporary Structure near Chun Shin Road	R	Existing	1
NTM-E4	Village House near Chuk Yau Road	R	Existing	2
NTM-E5	Temporary Structure near Chuk Yau Road	R	Existing	2
NTM-E6	Village House near Wang Ping Shan South Road	R	Existing	2
NTM-E7	House A, Greenacres Villa	R	Existing	3
NTM-E8	Temporary Structure near Ching Yau Road	R	Existing	1
SAT-E1	Temporary Structure near Shek Wu Wai San Tsuen	R	Existing	1
SAT-E2	Temporary Structure near Shek Wu Wai San Tsuen	R	Existing	1
SAT-E3	Temporary Structure near Shek Wu Wai	R	Existing	1
SAT-E4	89 Shek Wu Wai	R	Existing	3
SAT-E5	Temporary Structure near Shek Wu Wai	R	Existing	2
SAT-E6	Christian New Life Association	R	Existing	1
KLR-E1	616 Siu Hum Tsuen	R	Existing	3
KTR-E1	Village House near Kwu Tung Road	R	Existing	1
KTR-E2	Village House near Kwu Tung Road	R	Existing	2
KTR-E3	271 Chau Tau Tsuen	R	Existing	3
PSA-E1	Village House near Pak Shek Au	R	Existing	1
KTU-P1	Planned Housing Development at Kwu Tung North NDA	R	Planned	N/A ^(2)
KTU-P2	Planned Housing Development at Kwu Tung North NDA	R	Planned	N/A ^(2)
KTU-P3	Planned Housing Development at Kwu Tung North NDA	R	Planned	N/A ^(2)
KTU-P4	Planned Housing Development at Kwu Tung North NDA	R	Planned	N/A ^(2)
KTU-P5	Planned Housing Development at Kwu Tung North NDA	R	Planned	N/A ^(2)
KTU-P6	Planned Housing Development at Kwu Tung North NDA	R	Planned	N/A ^(2)
KTU-P7	Planned Housing Development at Kwu Tung North NDA	R	Planned	N/A ^(2)
KTU-P8	Planned Housing Development at Kwu Tung North NDA	R	Planned	N/A ^(2)
TSH-E1	Village House near Tai Shu Ha Road West	R	Existing	1

Notes:

(1) E – Educational Institution; G/IC – Government, Institution or Community; HA – Home for the Aged; R – Residential.

(2) Information regarding number of storeys for the planned/ committed developments is unavailable at the time of preparing this EIA Report.

(3) Based on the best available information provided by CLP Power Hong Kong Limited, there will be a cable reserve zone along the southwest boundary of the G/IC site and a planned substation to be located at southern part of the GI/C site. Information subject to the design of the planned development. The NAP was assumed at a location outside the cable reserve zone and the planned substation

Table 4.6 Representative NAPs for Operational Noise - Fixed Plant Noise Impact Assessment

NAP ID^(1),(21)	Description	Land Use^(2)	Existing / Planned	No. of Storey	Type of Area	Influencing Factor	Degree to which NSR is affected	Area Sensitive Rating ^(3),(4)
KSR-PF01a	Future Kam Sheung Road Package 2 Property Development	R	Planned	-^(6)	Area other than those above^(7)	-	-	B
KSR-PF01b	Future Kam Sheung Road Package 2 Property Development	R	Planned	-^(6)	Area other than those above^(7)	-	-	B
KSR-PF01c	Future Kam Sheung Road Package 2 Property Development	R	Planned	-^(6)	Area other than those above^(7)	-	-	B
KSR-PF02a	Grand Mayfair	R	Planned	16	Area other than those above^(8)	-	-	B
KSR-PF02b	Grand Mayfair	R	Planned	16	Area other than those above^(8)	-	-	B
KSR-PF02c	Grand Mayfair	R	Planned	16	Area other than those above^(8)	-	-	B
KSR-PF02d	Grand Mayfair	R	Planned	16	Area other than those above^(8)	-	-	B
KSR-PF03a	Planned G/IC Site at Kam Tin South Housing Development	G	Planned	-^(6)	Area other than those above^(9)	-	-	B
KSR-PF03b	Planned G/IC Site at Kam Tin South Housing Development	G	Planned	-^(6)	Area other than those above^(9)	-	-	B
KSR-PF04	Planned Residential Block at Kam Tin South Housing Development	R	Planned	-^(6)	Area other than those above^(9)	-	-	B
KSR-PF05	Planned G/IC Site at Kam Tin South Housing Development	G	Planned	-^(6)	Area other than those above^(9)	-	-	B
KSR-PF06	Planned School Site at Kam Tin South Housing Development	E	Planned	-^(6)	Area other than those above^(9)	-	-	B
KSR-PF08	Planned School in Park Yoho Phase 3	E	Planned	-^(6)	Area other than those above^(10)	-	-	B
KSR-PF08a	Planned School in Park Yoho Phase 3	E	Planned	-^(6)	Area other than those above^(10)	-	-	B
AUT-F01	Tower 8B, Park Yoho	R	Existing	14	Area other than those above^(11)	-	-	B
AUT-F01a	Tower 5B, Park Yoho	R	Existing	13	Area other than those above^(11)	-	-	B
AUT-PF01	Planned Residential Block at Sha Po Public Housing Development	R	Planned	-^(6)	Area other than those above^(13)	San Tin Highway	Not Affected	B
AUT-PF02	Planned Residential Block at Sha Po Public Housing Development	R	Planned	-^(6)	Area other than those above^(13)	San Tin Highway	Not Affected	B
AUT-PF03	Planned Residential Block at Sha Po Public Housing Development	R	Planned	-^(6)	Area other than those above^(13)	San Tin Highway	Not Affected	B
AUT-PF04	Planned Residential Block at Sha Po Public Housing Development	R	Planned	-^(6)	Area other than those above^(13)	San Tin Highway	Not Affected	B
AUT-F06	26 Mo Fan Heung	R	Existing	2	Area other than those above	Industrial Zone	Within 100m of Industrial Zone	B ^(12)
AUT-F02	Shum Residence	R	Existing	2	Area other than those above	Industrial Zone	Within 100m of Industrial Zone	B ^(12)
AUT-F05a	166 Pok Wai	R	Existing	2	Low density residential area	San Tin Highway	Indirectly Affected	B
AUT-F05b	170 Pok Wai	R	Existing	3	Low density residential area	San Tin Highway	Indirectly Affected	B
AUT-F05c	169 Pok Wai	R	Existing	2	Low density residential area	San Tin Highway	Indirectly Affected	B
NTM-F01	Village House in Long Ha	R	Existing	1	Area other than those above^(14)	San Tin Highway	Not Affected	B
NTM-F02	Village House in Long Ha	R	Existing	1	Low density residential area	-	-	A
NTM-F04	Hongtai Home for the Aged Limited	HA	Existing	3	Area other than those above^(16)	-	-	B
NTM-F04a	Temporary Structure near Ching Yau Road	R	Existing	1	Area other than those above^(16)	-	-	B
NTM-F05	The Dhamma Garden	R/W	Existing	3	Area other than those above^(18)	-	-	B
NTM-F05a	Temporary Structure near Chuk Yau Road	R	Existing	2	Area other than those above^(16)	-	-	B
NTM-F06	Village House near Wang Ping Shan South Road	R	Existing	2	Area other than those above^(16)	-	-	B
NTM-F07	Temporary Structure near Chun Shin Road	R	Existing	1	Low density residential area	-	-	A
NTM-F08	Village House near Chuk Yau Road	R	Existing	2	Area other than those above^(16)	-	-	B
NTM-PF01^(17)	Potential Development at Land Use Review Study for Ngau Tam Mei Area (NTM LUR)	-^(6)	Planned	-^(6)	Area other than those above^(16)	-	-	B
NTM-PF01a^(17)	Potential Development at NTM LUR	-^(6)	Planned	-^(6)	Area other than those above^(16)	-	-	B
NTM-PF01b^(17)	Potential Development at NTM LUR	-^(6)	Planned	-^(6)	Area other than those above^(16)	-	-	B
NTM-PF02^(17)	Potential Development at NTM LUR	-^(6)	Planned	-^(6)	Area other than those above^(16)	-	-	B
NTM-PF04^(17)	Potential Development at NTM LUR	-^(6)	Planned	-^(6)	Area other than those above^(16)	-	-	B
NTM-PF07a ^(17)	Potential Development at NTM LUR	-^(6)	Planned	-^(6)	Area other than those above^(16)	-	-	B
NTM-PF07b^(17)	Potential Development at NTM LUR	-^(6)	Planned	-^(6)	Area other than those above^(16)	-	-	B
NTM-PF07c^(17)	Potential Development at NTM LUR	-^(6)	Planned	-^(6)	Area other than those above^(16)	-	-	B
NTM-PF07d^(17)	Potential Development at NTM LUR	-^(6)	Planned	-^(6)	Area other than those above^(16)	-	-	B
NTM-PF07e^(17)	Potential Development at NTM LUR	-^(6)	Planned	-^(6)	Area other than those above^(16)	-	-	B
NTM-PF07f^(17)	Potential Development at NTM LUR	-^(6)	Planned	-^(6)	Area other than those above^(16)	-	-	B
NTM-PF07g^(17)	Potential Development at NTM LUR	-^(6)	Planned	-^(6)	Area other than those above^(16)	-	-	B
NTM-PF07h^(17)	Potential Development at NTM LUR	-^(6)	Planned	-^(6)	Area other than those above^(16)	-	-	B
NTM-PF07q^(17)	Potential Development at NTM LUR	-^(6)	Planned	-^(6)	Area other than those above^(16)	-	-	B
NTM-PF07r^(17)	Potential Development at NTM LUR	-^(6)	Planned	-^(6)	Area other than those above^(16)	-	-	B
NTM-PF07s^(17)	Potential Development at NTM LUR	-^(6)	Planned	-^(6)	Area other than those above^(16)	-	-	B
SAT-F02	Temporary Structure near Shek Wu Wai	R	Existing	1	Low density residential area	-	-	A
SAT-PF01a	Potential Housing Development in San Tin / Lok Ma Chau Development Node (STLMC DN)	R	Planned	-^(6)	Area other than those above^(19)	-	-	B
SAT-PF01b	Potential Housing Development in STLMC DN	R	Planned	-^(6)	Area other than those above^(19)	-	-	B
SAT-PF01c	Potential Housing Development in STLMC DN	R	Planned	-^(6)	Area other than those above^(19)	-	-	B
SAT-PF01d	Potential Housing Development in STLMC DN	R	Planned	-^(6)	Area other than those above^(19)	-	-	B
SAT-PF01e	Potential Housing Development in STLMC DN	R	Planned	-^(6)	Area other than those above^(19)	-	-	B
SAT-PF01f	Potential Housing Development in STLMC DN	R	Planned	-^(6)	Area other than those above^(19)	-	-	B
SAT-PF01h	Potential Housing Development in STLMC DN	R	Planned	-^(6)	Area other than those above^(19)	-	-	B
SAT-PF02d	Potential Housing Development in STLMC DN	R	Planned	-^(6)	Area other than those above^(19)	-	-	B
SAT-PF03	Potential School in STLMC DN	E	Planned	-^(6)	Area other than those above^(19)	-	-	B
SAT-PF03a	Potential Housing Development in STLMC DN	R	Planned	-^(6)	Area other than those above^(19)	-	-	B
SAT-PF05a	Potential FSD Staff Quarter in San Tin / Lok Ma Chau Development Node	R	Planned	-^(6)	Area other than those above^(19)	-	-	B
SAT-F04	271 Chau Tau Tsuen	R	Existing	3	Low density residential area	-	-	A
KTU-F01	Village House near Pak Shek Au	R	Existing	1	Area other than those above^(14)	-	-	B
KTU-F01a	Village House near Pak Shek Au	R	Existing	1	Area other than those above^(14)	-	-	B
KTU-PF01a	Planned Housing Development at Kwu Tung North NDA	R	Planned	-^(6)	Area other than those above^(20)	-	-	B
KTU-PF01b	Planned Housing Development at Kwu Tung North NDA	R	Planned	-^(6)	Area other than those above^(20)	-	-	B
KTU-PF01c	Planned Housing Development at Kwu Tung North NDA	R	Planned	-^(6)	Area other than those above^(20)	-	-	B
KTU-PF02a	Planned Housing Development at Kwu Tung North NDA	R	Planned	-^(6)	Area other than those above^(20)	-	-	B
KTU-PF02b	Planned Housing Development at Kwu Tung North NDA	R	Planned	-^(6)	Area other than those above^(20)	-	-	B
KTU-PF03a	Planned Housing Development at Kwu Tung North NDA	R	Planned	-^(6)	Area other than those above^(20)	-	-	B
KTU-PF03b	Planned Housing Development at Kwu Tung North NDA	R	Planned	-^(6)	Area other than those above^(20)	-	-	B
KTU-PF04a	Planned Housing Development at Kwu Tung North NDA	R	Planned	-^(6)	Area other than those above^(20)	-	-	B
KTU-PF04b	Planned Housing Development at Kwu Tung North NDA	R	Planned	-^(6)	Area other than those above^(20)	-	-	B
KTU-PF05a	Planned Housing Development at Kwu Tung North NDA	R	Planned	-^(6)	Area other than those above^(20)	-	-	B
KTU-PF05b	Planned Housing Development at Kwu Tung North NDA	R	Planned	-^(6)	Area other than those above^(20)	-	-	B
KTU-PF06a	Planned Housing Development at Kwu Tung North NDA	R	Planned	-^(6)	Area other than those above^(20)	-	-	B
KTU-PF06b	Planned Housing Development at Kwu Tung North NDA	R	Planned	-^(6)	Area other than those above^(20)	-	-	B
KTU-PF06c	Planned Housing Development at Kwu Tung North NDA	R	Planned	-^(6)	Area other than those above^(20)	-	-	B
KTU-PF07	Planned Housing Development at Kwu Tung North NDA	R	Planned	-^(6)	Area other than those above^(20)	-	-	B

Notes:

(1) For planned/committed development, the locations of NAP were identified based on the best available information provided from the relevant parties.

(2) E- Educational; HA - Home for the Aged; R – Residential; W – Place of Public Worship; G – G/IC

(3) The corresponding ASR of the NSRs are determined based on the best available information and is for indicative assessment only. The Noise Control Authority shall determine noise impact from concerned noise sources on the basis of prevailing legislation and practices being in force, and the ASR determined in this report should not bind the Authority when enforcing the NCO based on the contemporary conditions. The ASR would be reviewed as necessary based on the contemporary conditions/situations such as adjoining land uses, influencing factors or the latest new development areas.

(4) The fixed plant noise criteria are “ANL-5 dB(A)” of respective Area Sensitive Rating or prevailing background noise level where the prevailing background noise level is 5 dB(A) below the appropriate ANL.

(5) Not used.

(6) Information subject to the design of planned development.

(7) As the areas in the vicinity of the Future Kam Sheung Road Package 2 Property Development (i.e. Grand Mayfair and Kam Tin South Public Housing Development) will be developed to medium to high-density residential area, type of area was considered to be “Area other than those above”.

(8) According to the information in Sales Brochure of the development, Grand Mayfair will be developed to a medium to high-density residential area, type of area was therefore considered to be “Area other than those above”.

(9) According to the building layout plans provided by Housing Department, the Planned Kam Tin South Development (Site 1 & 6) would be developed to medium to high-density residential area, type of area was therefore considered to be “Area other than those above”.

(10) According to planning application A/YL-KTN/604 and A/YL-KTN/663, Park Yoho Phase 2 and 3 will be developed to a medium to high-density residential area, type of area was therefore considered to be “Area other than those above”.

(11) NAP is located in a medium to high-density residential area with some scattered industrial activities (e.g. garage), type of area was therefore considered to be “Area other than those above”.

(12) Considering the existing industrial zone would be changed to other land uses for Sha Po Public Housing Development, as conservative approach, the effect of industrial zone was not considered to determine the appropriate noise criteria.

(13) According to the block layout provided by Housing Department, the Proposed Public Housing Development Near Sha Po Tsuen would be developed to medium to high-density residential area, type of area was therefore considered to be “Area other than those above”.

(14) In view of open storages/industrial uses located in the vicinity of the NSRs, type of area was considered to be “Area other than those above”.

(15) Not used.

(16) According to Section 16 of LC Paper No. CB(1)756/20-21(01–) - Using Brownfield Clusters for Public Housing Development (Second Phase Review) and Other Developments, Ngau Tam Mei Area would be developed to provide a mix of over 6,000 public and private housing units. Based on this information, type of area was considered to be “Area other than those above”.

(17) Reference was made to the draft Preliminary Outline Development Plan (PODP) of Land Use Review Study for Ngau Tam Mei Area provided by the relevant government department.

(18) Not Used.

(19) According to Section 14 of LC Paper No. CB(1)756/20-21(01) - Using Brownfield Clusters for Public Housing Development (Second Phase Review) and Other Developments, the San Tin Lok Ma Chau Development Node (STLMC DN) would be developed as a new development area supporting an estimated housing yield of 31 000 units together with economic and community facilities. Based on this information, type of area was considered to be “Area other than those above”.

(20) Based on the information provided in the approved NENT NDA EIA report (Register No.: AEIAR-175/2013), the area near KTU(NOL) Station will be developed to a medium to high-density residential area, type of area was therefore considered to be “Area other than those above”.

(21) The identification of the planned NAPs is based on the following sources of best available information:

§ KSR-PF01a, KSR-PF1b & KSR-PF1c - No indicative layout plan was available during the course of EIA study and therefore the indicative location of NAP was set at the boundary of the Future Kam Sheung Road Package 2 Property Development.

§ KSR-PF02a, KSR-PF02b, KSR-PF02c and KSR-PF02d- Reference was made to the building layout provided in Sales Brochure of the development (See Note (8) above).

§ KSR-PF03a & KSR-PF3b - Based on the best available information provided by CLP Power Hong Kong Limited, there will be a cable reserve zone along the southwest boundary of the G/IC site and a planned substation to be located at southern part of the G/IC site. The NAP was assumed at a location outside the cable reserve zone and the planned substation.

§ KSR-PF05 & KSR-PF06 – Assessment points were assigned at the boundary of the respective zone for the conservative approach.

§ KSR-PF04 - Reference was made to building layout plans provided by Housing Department.

§ KSR-PF08 and KSR-PF08a - Reference was made to planning application A/YL-KTN/604 and A/YL-KTN/663, and the NAPs were identified based on the Indicative Master Layout Plan shown in these planning applications.

§ AUT-PF01, AUT-PF02, AUT-PF03 and AUT-PF04 - Reference was made to the building layout plans in Final Report (Sha Po) of Agreement No. CE 10/2020 (CE) Site Formation and Infrastructure Works for Proposed Public Housing Developments at Sha Po, Shap Pat Heung and Tai Kei Leng, Yuen Long – Feasibility Study, as provided by Housing Department.

§ NTM-PF01 to NTM-PF07s – Please refer to Note (17) above.

§ SAT-PF01a to SAT-PF05a – Reference was made to the Recommended Outline Development Plan (RODP) provided by the project proponent of STLMC DN.

§ KTU-PF01a to KTU-PF07 - Reference was made to the information provided by CEDD.

4.5 Construction Phase

Source of Impact

4.5.1 The potential sources of airborne noise impact during construction phase of the Project would mainly be the use of PME for various construction activities. Key construction works that would contribute to airborne construction noise impacts are summarized below.

· Construction of 5 stations including KSR(NOL), AUT, NTM, SAT and KTU(NOL) by cut-and-cover;

· Construction of tunnel connecting KSR(NOL), AUT, NTM, SAT and KTU(NOL) Stations by Tunnel Boring Machine (TBM);

· Construction of branching tunnel connecting to NTD by cut-and-cover, mined and drill-and-blast tunnelling method;

· Construction of NTD;

· Construction of overrun tunnel section at KSR and crossover box and bifurcation at SAT by cut-and-cover;

· Demolition of EAP (an aboveground structure) under Existing EAL at Kwu Tung;

· Construction of ABs for EAP/EEPs/VBs;

· Site clearance, construction and reinstatement of temporary explosive magazine at Tai Shu Ha (Yuen Long) and reinstatement;

· Works such as temporary traffic management (TTM), landscaping, minor reinstatement, material delivery, etc.; and

· Construction, operation, and demolition of a concrete batching plant (CBP) at San Tin.

4.5.2 For the construction of branching tunnel connecting to NTD, drill-and-blast tunnelling method would be adopted. There is no statutory procedure or criteria under the NCO and EIAO for assessing the blasting impacts. However, the administrative and procedural control of all blasting operations in Hong Kong is vested in the Mines Division of the CEDD. The Dangerous Goods (General) Regulations, Chapter 295B also stipulates that no person shall carry out blasting unless the possesses a valid mine blasting certificate to be issued by the Mines Division of CEDD.

4.5.3 Major planned/ committed projects in the vicinity which may have potential interface with the Project were identified in Section 2.9 and recapped below. Any cumulative airborne construction noise impacts from these concurrent projects would be considered and addressed in the EIA Study as appropriate.

· Kam Tin South Public Housing Development;

· Grand Mayfair (under construction);

· Kam Sheung Road Package 2 Property Development;

· Kam Tai Road Residential Development (under construction);

· Park Yoho Phase 2 & 3 Development;

· Sha Po Public Housing Development;

· Land Use Review Study for Ngau Tam Mei Area;

· Proposed watermains under Ngau Tam Mei Water Treatment Works Extension;

· San Tin Lok Ma Chau Development Node – Investigation (also known as San Tin Technopole);

· Kwu Tung North New Development Area – Advance Works;

· Kwu Tung North New Development Area – Remaining Phase; and

· Kwu Tung Station on Lok Ma Chau Spur Line.

4.5.4 The construction of the Project will tentatively commence in 2025 for completion in 2034. The plant inventory (Appendix 4.6 refers) was provided and confirmed by the construction professional for the construction noise impact assessment, while the construction programme is shown in Appendix 2.2.

4.5.5 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 were reviewed by the construction professionals and were concluded to be practical for the purposed of this EIA. Appendix 4.6 tabulates the adopted utilization rates, and Appendix 4.7 presents the currently envisaged locations of the workfronts and distances between the notional sources and the NAPs.

4.5.6 The Project Proponent has formulated a reasonable construction programme to avoid noisy construction works, particularly the aboveground works, to be carried out in restricted hours as far as practicable. According to the proposed construction programme, most of the proposed construction works would be carried out during non-restricted hours.  However, certain construction works which would cause not only serious interruption or disruption to road or rail traffic but also the safety concern to pedestrians and drivers. Therefore, some works are unavoidably required to be carried out during restricted hours, so as to minimise inconvenience/ safety issue to the public.  In case of any construction activities are unavoidable to be conducted during restricted hours (i.e. 1900 – 0700 hours), it is the Contractor’s responsibility to ensure the compliance with the NCO and the relevant TMs. The Contractor should submit CNP application to the Noise Control Authority and abide by any conditions stated in the CNP, should one be issued. According to best available information in this stage, the construction works that would be carried out during restricted hours have been identified as below:

· Construction works in proximity to existing rail operation; and

· Construction of tunnels by TBM (Figure No. C1603/C/NOL/ACM/M50/305 refers).

4.5.7 In addition, TBM would be operated during restricted hours at some locations. As the operation of TBM would be underground, the airborne construction noise impact is not anticipated. However, if there would be any associated activities such as removal of debris and rocks during restricted hours, the Contractor should submit CNP application to the Noise Control Authority.

Assessment Methodology

4.5.8 The airborne construction noise impact assessment was conducted based on the following procedures:

· Determine 300m from the boundary of the Project and the works sites/areas;

· Obtain the construction methods and work sequences for the construction period;

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

· Determine the Sound Power Levels (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 NAPs;

· Quantify the level of impact at the NAPs, 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 for ventilation fan, full noise enclosure for TBM launching shafts/ retrieval shafts, etc., should be examined to alleviate the predicted noise impacts as much as practicable; and

· Consideration of noise mitigation measures by following Annex 13 of EIAO-TM, EIAO Guidance Note “Preparation of Construction Noise Impact Assessment under the Environmental Impact Assessment Ordinance” [GN 9/2010] and Good Practices on Mitigation Construction Noise by EPD.

Cumulative Construction Noise Impact

4.5.9 Concurrent projects in the vicinity of the Project as listed out in Section 4.5.3 were reviewed. Cumulative construction noise impacts arising from San Tin Lok Ma Chau Development Node and NENT NDA have been included in this quantitative impact assessment where appropriate.

4.5.10 In accordance with the approved Environmental Review Report (ERR) for the Variation of Environmental Permit (VEP) of Sheung Shui to Lok Ma Chau Spur Line (Application No.: VEP-604/2021), the construction of KTU(EAL) Station would tentatively commence in Q3 2023 for completion by 2027. Major construction activities including site mobilization and excavation would be carried out from Q1 2024 to Q2 2025. Only minor construction works, i.e. structural works, site reinstatements, and inspection and trial runs, that would not cause significant construction noise impacts, would remain afterwards. Cumulative construction noise impacts are anticipated to be the most significant in Q2 2025 when the construction works for KTU(NOL) Station starts, yet they are considered to be relatively transient. Any cumulative impacts due to construction of KTU(EAL) Station are expected to be minimal from Q3 2025 onwards.

4.5.11 For the concurrent projects with no details on the construction programme and plant inventory at the time of preparing this EIA, they are not included in this cumulative assessment.

Prediction and Evaluation of Environmental Impacts

Unmitigated Airborne Construction Noise Impact during Non-restricted Hours

4.5.12 For normal daytime working hours, according to the latest engineering design, construction would mainly comprise the activities as described in Section 4.5.1. Appendix 4.5 presents the SWLs of each PME. Appendix 4.6 presents the plant inventory adopted for each workfront while Appendix 4.7 shows the locations of workfronts adopted for this construction noise assessment.

4.5.13 Appendix 4.8 presents the unmitigated construction noise levels predicted at representative NAPs, while the summary of unmitigated construction noise levels at the NAPs under unmitigated scenario is provided in Table 4.7 below.

Table 4.7 Summary of Unmitigated Construction Noise Levels

NAP ID	Description	Land Use^(1)	Daytime Noise Criterion, Leq (30min), dB(A) ^(2)	Max. Unmitigated Construction Noise Levels, Leq (30mins), dB(A) ^(3)	Max. Noise Exceedance, dB(A) ^(2)
PHD-E1	11D Shek Wu Tong	R	75	70	-
PHDKSR-E1	2 Shek Wu Tong	R	75	73	-
PHDKSR-P1	Planned Residential Block at Kam Tin South Housing Development	R	75	82	7
PHDKSR-P2	Planned Residential Block at Kam Tin South Housing Development	R	75	84	9
PHDKSR-P3	Planned Residential Block at Kam Tin South Housing Development	R	75	83	8
KSR-P1	Planned Residential Block at Kam Tin South Housing Development	R	75	78	3
KSR-P2	Planned G/IC Site at Kam Tin South Housing Development	G/IC	75	88	13
KSR-P3	Planned G/IC Site at Kam Tin South Housing Development	G/IC	75	79	4
KSR-P4	Planned Residential Block at Kam Tin South Housing Development	R	75	79	4
KSR-P5	Grand Mayfair	R	75	84	9
KSR-P6	Grand Mayfair	R	75	80	5
KSR-P7	Grand Mayfair	R	75	78	3
KSR-P8	Planned School Site at Kam Tin South Housing Development	E	70 (65)	87	17(22)
KSR-E1	230 Kat Hing Wai	R	75	75	-
SMR-E1	Tower 8B, Park Yoho	R	75	87	12
SMR-E2	Tower 1A, Park Yoho	R	75	70	-
AUT-E1	Shum Residence	R	75	80	5
AUT-E2	26 Mo Fan Heung	R	75	86	11
AUT-P1	Planned Residential Block at Sha Po Public Housing Development	R	75	66	-
AUT-P2	Planned Residential Block at Sha Po Public Housing Development	R	75	69	-
AUT-P3	Planned Residential Block at Sha Po Public Housing Development	R	75	63	-
POW-E1	166 Pok Wai	R	75	87	12
POW-E2	171A Pok Wai	R	75	86	11
POW-E3	169 Pok Wai	R	75	91	16
POW-E4	170 Pok Wai	R	75	84	9
LHT-E1	Village House in Long Ha	R	75	73	-
NTM-E1	Hongtai Home for the Aged	HA	75	85	10
NTM-E2	Village House in Yau Tam Mei Tsuen	R	75	85	10
NTM-E3	Temporary Structure near Chun Shin Road	R	75	78	3
NTM-E4	Village House near Chuk Yau Road	R	75	90	15
NTM-E5	Temporary Structure near Chuk Yau Road	R	75	86	11
NTM-E6	Village House near Wang Ping Shan South Road	R	75	82	7
NTM-E7	House A, Greenacres Villa	R	75	78	3
NTM-E8	Temporary Structure near Ching Yau Road	R	75	83	8
SAT-E1	Temporary Structure near Shek Wu Wai San Tsuen	R	75	80	5
SAT-E2	Temporary Structure near Shek Wu Wai San Tsuen	R	75	83	8
SAT-E3	Temporary Structure near Shek Wu Wai	R	75	80	5
SAT-E4	89 Shek Wu Wai	R	75	85	10
SAT-E5	Temporary Structure near Shek Wu Wai	R	75	81	6
SAT-E6	Christian New Life Association	R	75	84	9
KLR-E1	616 Siu Hum Tsuen	R	75	66	-
KTR-E1	Village House near Kwu Tung Road	R	75	79	4
KTR-E2	Village House near Kwu Tung Road	R	75	79	4
KTR-E3	271 Chau Tau Tsuen	R	75	69	-
PSA-E1	Village House near Pak Shek Au	R	75	83	8
KTU-P1	Planned Housing Development at Kwu Tung North NDA	R	75	75	-
KTU-P2	Planned Housing Development at Kwu Tung North NDA	R	75	83	8
KTU-P3	Planned Housing Development at Kwu Tung North NDA	R	75	76	1
KTU-P4	Planned Housing Development at Kwu Tung North NDA	R	75	71	-
KTU-P5	Planned Housing Development at Kwu Tung North NDA	R	75	70	-
KTU-P6	Planned Housing Development at Kwu Tung North NDA	R	75	88	13
KTU-P7	Planned Housing Development at Kwu Tung North NDA	R	75	86	11
KTU-P8	Planned Housing Development at Kwu Tung North NDA	R	75	86	11
TSH-E1	Village House near Tai Shu Ha Road West	R	75	60	-

Notes:

(1) E – Educational Institution; G/IC – Government, Institution or Community; HA – Home for the Aged; R – Residential.

(2) Values in parentheses are applicable to the examination period of education institution.

(3) Bolded values indicate exceedance against the relevant noise criterion.

4.5.14 Based on the above table, without implementation of mitigation measures, the exceedances of noise criteria would range from 1 to 16 dB(A) for residential premises, and 17 dB(A) and 22 dB(A) during normal period and examination period for school respectively. It is estimated that approximately 160 dwellings (existing dwellings at the time of preparing this EIA Report) would be exposed to construction noise impacts exceeding the relevant criteria under unmitigated scenario.

Unmitigated Airborne Construction Noise Impact during Restricted Hours

4.5.15 The Project Proponent has formulated a reasonable construction programme to avoid works particularly the aboveground works, to be carried out in restricted hours as far as practicable. According to the proposed construction programme, most of the proposed construction works would be carried out during non-restricted hours.  However, certain construction works which would cause not only serious interruption or disruption to road or rail traffic but also the safety concern to pedestrians and drivers are required to be carried out during restricted hours, so as to minimise inconvenience to the public.  In case of any construction activities are unavoidable to be conducted during restricted hours (i.e. 1900 – 0700 hours), it is the Contractor’s responsibility to ensure the compliance with the NCO and the relevant TMs. The Contractor should submit CNP application to the Noise Control Authority and abide by any conditions stated in the CNP, should one be issued.

Mitigation Measures

4.5.16 Given that there would be construction noise exceedances predicted during daytime period, mitigation measures are therefore required with the following mitigation measures considered:

· Adoption of quieter construction methods;

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

· Use of quiet PMEs;

· Use of temporary movable noise barriers, noise enclosure, noise insulating fabric, silencer, soundproof hammer bracket to screen noise from PMEs;

· Installation of temporary noise barrier along PWA works site boundary to screen noise for the NSR at Pok Wai; and

· Alternative use of plant items within one worksite, wherever practicable.

4.5.17 The above mitigation measures would be implemented at works sites as good practices where appropriate.

Adoption of Quieter Construction Methods

4.5.18 The practicability of the following quieter construction methods has been reviewed by the construction professionals.

· Use of TBM;

· Use of large diameter bored piling;

· Use of pre-casting and prefabrication technology;

· Use of silent piling such as hydraulic press-in method; and

· Use of rubber head poker vibrator.

4.5.19 Use of TBM and large diameter bored piling have been duly considered during the formulation of construction design. They would be adopted where appropriate and practicable to substitute the noisier cut-and-cover method using excavator-mounted breaker for tunnelling and percussive piling for foundation works.

4.5.20 In addition, off-site prefabrication technologies including Modular Integrated Construction (MiC) and Design for Manufacture and Assembly (DfMA) would be used for the construction of the stations and ABs as far as practicable. Both technologies involve the technique of having modular components (e.g. reinforced concrete beams, slabs and columns, etc.) manufactured off-site and would then be transported to site for assembly. The adoption of MiC and DfMA could result in lesser on-site construction activity and shorter construction period, minimising any airborne construction noise impact to NSRs.

4.5.21 In view of the construction noise impacts associated with sheet piling/ H-beam piling, employment of silent piling by press-in method has been explored as well and considered practicable. This alternative construction method would be adopted at the sites at which the construction activities would induce non-compliance, including KSR, SAT, Shui Mei Road Ancillary Building (SMA), Pak Shek Au Ancillary Building (PAA) and etc.

4.5.22 Use of rubber head poker vibrator will be adopted in place of conventional vibratory poker where appropriate and practicable.

4.5.23 For the use of hydraulic crusher and ripper, the Project Proponent will review the feasibility if further mitigation measures are required.

Good Site Practice

4.5.24 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) that may be in intermittent use should be shut down between work periods or should be throttled down to a minimum;

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

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

· Spoil transportation routes should be directed away from NSRs as far as practicable;

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

· Material stockpiles, site office and other structures should be effectively utilized, wherever practicable, to screen noise from on-site construction activities; and

· Noise monitoring at selected NSRs should be conducted as far as practicable.

4.5.25 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.

Use of Quiet PMEs

4.5.26 Quiet PMEs would be adopted where appropriate, by making reference to the PME listed in the GW-TM, the Quality Powered Mechanical Equipment (QPME)/ other commonly used PME listed in EPD web pages or PME specification published by equipment manufacturer. It is generally known (supported by field measurement) that particular models of construction equipment are quieter than standard types given in the GW-TM.

4.5.27 The types of quiet PME adopted in this assessment are presented in Appendix 4.5 and is for reference only. The Contractor may adopt alternative quiet PME which can be demonstrated that they would not result in construction noise impacts worse than those predicted in this assessment.

Use of Temporary Movable Noise Barrier, Noise Enclosure, Noise Insulating Fabric, Silencer and Soundproof Hammer Bracket

4.5.28 Temporary movable 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. A typical design which has been used locally is a wooden framed barrier with a small-cantilevered upper portion of superficial density no less than 7kg/m² on a skid footing with 25mm thick internal sound absorptive lining. 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.

4.5.29 Temporary movable 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.

4.5.30 For the use of temporary movable noise barrier for at-grade construction works, working space would be considered for their manoeuvrability and placement. Generally, sufficient separation between major plants during at-grade construction works is envisaged to cater for the use of temporary movable noise barriers onsite. Temporary movable noise barrier can be placed close to noise source locally as far as practicable.

4.5.31 In addition, noise insulating fabric (acoustic mats) would be installed for PME such as piling rigs and drilling rigs and the fabric should be lapped such that there would be no opening or gaps on the joints. With reference to MTRC Contract C4420 Tsim Sha Tsui Modification Noise Assessment Report for Variation of Environmental Permit (July 2003) and the technical data from manufacturer, a noise reduction of over 10dB(A) could be achieved with the use of the fabric. Therefore, as a conservative approach, a noise reduction of 10dB(A) for the PME lapped with the fabric was assumed in this assessment.

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

4.5.33 To minimise the noise impact arising from excavator-mounted hydraulic breakers, soundproof hammer bracket will also be installed by Contractor. According to the "Best Practice Guide for Environmental Protection on Construction Sites", page 6-10, published by Hong Kong Construction Association, May 2013, excavator-mounted breaker with soundproof hammer bracket can provide a noise reduction of up to 10 dB(A). The bracket should be made of special alloy and the inside of it is lined with sound insulation material. For conservativeness, the soundproof hammer bracket should be used together with a temporary movable noise barrier or other equivalent mitigation measure(s) for achieving a noise reduction of 10 dB(A) noise reduction.

4.5.34 The feasibility, practicability, programming and effectiveness of the above mitigation measures have been reviewed.

4.5.35 A summary of the temporary movable noise barrier, noise enclosure, noise insulating fabric, etc., adopted for various PMEs is given in Appendix 4.5 and the associated noise reduction is summarised in Table 4.8. Indicative drawings for barrier and enclosure are shown in Appendix 4.9.

Table 4.8 Summary of Mitigation Measures adopted for PMEs

PME	Mitigation Measures	Attenuation, dB(A)
Air compressor, air flow > 30m^3/min	Barrier	-10
Asphalt paver	Barrier	-5
Batching Plant	Barrier	-10
Hand-held breaker	Barrier	-10
Breaker, excavator mounted (hydraulic)	Barrier with Soundproof Hammer Bracket (or other equivalent mitigation measure(s))	-10
Bulldozer	Barrier	-5
Concrete corer	Enclosure	-15
Concrete lorry mixer	Barrier	-5
Concrete mixer	Barrier	-10
Concrete pump	Enclosure	-15
Mobile crane	Barrier	-5
Crane, tower (electric)	Barrier	-5
Compactor, vibratory	Barrier	-10
Drill/ grinder, percussive, hand-held (electric)	Barrier	-10
Excavator/ loader	Barrier	-5
Hoist	Barrier	-5
Piling, diaphragm wall, bentonite filtering plant/ slurry treatment plant	Barrier	-10
Piling, larger diameter bored, grab and chisel	Acoustic Mat	-10
Piling, larger diameter bored, oscillator	Acoustic Mat	-10
Piling, larger diameter bored, reverse circulation drill	Acoustic Mat	-10
Piling, earth auger	Acoustic Mat	-10
Power pack	Barrier	-10
Vibratory poker	Barrier	-10
Planer	Barrier	-10
Roller, vibratory	Barrier	-5
Saw	Barrier	-10
Ventilation fan	Silencer	-15
Drill rig	Acoustic Mat	-10
Grout pump	Barrier	-10
Portable generator	Barrier	-10
Vibrating hammer	Barrier	-10
Lorry	Barrier	-5
Dump truck	Barrier	-5

Installation of Temporary Noise Barrier along the PWA Works Site Boundary

4.5.36 In view of the close proximity between a village house (i.e. POW-E3) and construction works for PWA, a noise barrier, which would provide at least 8dB(A) noise reduction, is proposed along the site boundary adjacent to the concerned NSR. The location and the section drawing of the proposed temporary noise barrier is shown in Appendix 4.10. The design of the barrier should include the followings:

· Gaps and openings at joints should be avoided;

· The length of the barrier should be about 75m while the height should be about 2.3m; and

· Surface density of the barrier should be no less than 7kg/m².

Alternative Use of Plant Items within One Works Site

4.5.37 In practice, some plant items will operate sequentially within the same worksite, and certain reduction of the predicted noise impacts could be achieved. However, any additional control on the sequencing of plants will impose a restrictive constraint to the Contractor on the operation and planning of plant items, and the implementation of the requirement would be difficult to be monitored. Hence, sequencing operation of PME has not been taken into consideration.

Mitigation Measures for Construction Works During Restricted Hours

4.5.38 The Contractor(s) should avoid conducting construction activities during restricted hours as far as practicable. If such construction activities are unavoidable, the Contractor(s) should adopt quieter construction methods such as use of QPME, quieter PME, quieter construction method (such as use of hydraulic crusher/wire saw/hand-held concrete crusher instead of hydraulic breaker for demolition works), purpose-built noise barrier and noise enclosure as far as practicable for construction activities during restricted hours to ensure compliance with the NCO and relevant TM. The effectiveness and practicality of all these identified measures should be investigated and verified during the design, tendering and implementation stage of the construction works.

Mitigated Construction Noise Levels during Non-Restricted Hours

4.5.39 Appendix 4.10 presents the details of mitigated construction noise levels predicted at the representative NAPs. A summary of the mitigated construction noise levels predicted at the NAPs is provided in Table 4.9 below.

Table 4.9 Summary of Mitigated Construction Noise Levels

NAP ID	Description	Land Use^(1)	Daytime Noise Criterion, Leq (30min), dB(A) ^(2)	Mitigated Construction Noise Levels, Leq (30mins), dB(A) ^(3)	Max. Noise Exceedance, dB(A) ^(2)
PHD-E1	11D Shek Wu Tong	R	75	55	-
PHDKSR-E1	2 Shek Wu Tong	R	75	57	-
PHDKSR-P1	Planned Residential Block at Kam Tin South Housing Development	R	75	66	-
PHDKSR-P2	Planned Residential Block at Kam Tin South Housing Development	R	75	67	-
PHDKSR-P3	Planned Residential Block at Kam Tin South Housing Development	R	75	67	-
KSR-P1	Planned Residential Block at Kam Tin South Housing Development	R	75	65	-
KSR-P2	Planned G/IC Site at Kam Tin South Housing Development	G/IC	75	75	-
KSR-P3	Planned G/IC Site at Kam Tin South Housing Development	G/IC	75	66	-
KSR-P4	Planned Residential Block at Kam Tin South Housing Development	R	75	68	-
KSR-P5	Grand Mayfair	R	75	73	-
KSR-P6	Grand Mayfair	R	75	68	-
KSR-P7	Grand Mayfair	R	75	67	-
KSR-P8	Planned School Site at Kam Tin South Housing Development	E	70 (65)	70	(5)
KSR-E1	230 Kat Hing Wai	R	75	63
SMR-E1	Tower 8B, Park Yoho	R	75	75	-
SMR-E2	Tower 1A, Park Yoho	R	75	55	-
AUT-E1	Shum Residence	R	75	69	-
AUT-E2	26 Mo Fan Heung	R	75	75	-
AUT-P1	Planned Residential Block at Sha Po Public Housing Development	R	75	53	-
AUT-P2	Planned Residential Block at Sha Po Public Housing Development	R	75	57	-
AUT-P3	Planned Residential Block at Sha Po Public Housing Development	R	75	51	-
POW-E1	166 Pok Wai	R	75	72	-
POW-E2	171A Pok Wai	R	75	71	-
POW-E3	169 Pok Wai	R	75	75	-
POW-E4	170 Pok Wai	R	75	70	-
LHT-E1	Village House in Long Ha	R	75	- ^(6)	-
NTM-E1	Hongtai Home for the Aged	HA	75	74	-
NTM-E2	Village House in Yau Tam Mei Tsuen	R	75	73	-
NTM-E3	Temporary Structure near Chun Shin Road	R	75	64	-
NTM-E4	Village House near Chuk Yau Road	R	75	74	-
NTM-E5	Temporary Structure near Chuk Yau Road	R	75	70	-
NTM-E6	Village House near Wang Ping Shan South Road	R	75	71	-
NTM-E7	House A, Greenacres Villa	R	75	64	-
NTM-E8	Temporary Structure near Ching Yau Road	R	75	71	-
SAT-E1	Temporary Structure near Shek Wu Wai San Tsuen	R	75	70	-
SAT-E2	Temporary Structure near Shek Wu Wai San Tsuen	R	75	72	-
SAT-E3	Temporary Structure near Shek Wu Wai	R	75	69	-
SAT-E4	89 Shek Wu Wai	R	75	74 ^(5)	-
SAT-E5	Temporary Structure near Shek Wu Wai	R	75	71	-
SAT-E6	Christian New Life Association	R	75	71	-
KLR-E1	616 Siu Hum Tsuen	R	75	71 ^(4)	-
KTR-E1	Village House near Kwu Tung Road	R	75	67	-
KTR-E2	Village House near Kwu Tung Road	R	75	67	-
KTR-E3	271 Chau Tau Tsuen	R	75	59	-
PSA-E1	Village House near Pak Shek Au	R	75	70	-
KTU-P1	Planned Housing Development at Kwu Tung North NDA	R	75	64 ^(5)	-
KTU-P2	Planned Housing Development at Kwu Tung North NDA	R	75	72 ^(5)	-
KTU-P3	Planned Housing Development at Kwu Tung North NDA	R	75	65 ^(5)	-
KTU-P4	Planned Housing Development at Kwu Tung North NDA	R	75	60 ^(5)	-
KTU-P5	Planned Housing Development at Kwu Tung North NDA	R	75	59 ^(5)	-
KTU-P6	Planned Housing Development at Kwu Tung North NDA	R	75	75 ^(5)	-
KTU-P7	Planned Housing Development at Kwu Tung North NDA	R	75	74 ^(5)	-
KTU-P8	Planned Housing Development at Kwu Tung North NDA	R	75	74 ^(5)	-
TSH-E1	Village House near Tai Shu Ha Road West	R	75	52	-

Notes:

(1) E – Educational Institution; G/IC – Government, Institution or Community; HA – Home for the Aged; R – Residential.

(2) Values in parentheses are applicable to the examination period of education institution.

(3) Bolded values indicate exceedance against the relevant noise criterion.

(4) No mitigation measures are considered necessary and proposed, given that compliance with noise criterion under unmitigated scenario. Cumulative airborne construction noise impacts from San Tin Lok Ma Chau Development Node were incorporated.

(5) Cumulative airborne construction noise impacts from San Tin Lok Ma Chau Development Node and NENT NDA were incorporated.

(6) No mitigation measures are considered necessary and proposed, given that compliance with noise criterion under unmitigated scenario.

4.5.40 With the adoption of the above mitigation measures, the predicted construction noise levels at the identified NAPs would be largely reduced, complying with the corresponding noise criterion, except at the planned school site at Kam Tin South Housing Development (i.e. KSR P-8) where exceedance of 5dB(A) are still anticipated during examination period. The Contractor should liaise with the representative of concerned school and/or the Examination Authority to ascertain the exact dates and times of all examination periods during the construction period and should avoid conducting noisy activities during the examination periods if the school is relied on opened windows for ventilation. With the avoidance of particular noisy construction activities during the examination periods, the mitigated construction noise impact at the concerned school would comply with the stipulated noise criterion.

4.5.41 It is recommended that Construction Noise Management Plan(s) (CNMP(s)) should be prepared based on the best available information before the issue of tender and the commencement of construction works, subject to the contract arrangement of the Project and agreement with EPD. The plan should include a quantitative construction noise impact assessment with details on the construction method, plant inventory and recommended noise mitigation measures for the future contractors’ further update on CNMP before commencement of construction works and implementation in order to minimise the construction noise impact and comply with the EIAO-TM. In addition, further review on the cumulative construction noise impact should be conducted as necessary in the later CNMP when the information of the concurrent project is available. The CNMP(s) should be certified by Certified Noise Modelling Professional of Hong Kong Institute of Qualified Environmental Professionals (HKIQEP) or equivalent.

Evaluation of Residual Construction Noise Impacts

4.5.42 With the implementation of the recommended noise mitigation measures, including quieter construction methods, good site practices, the use of QPME, temporary movable noise barriers, proper scheduling and arrangement of concerned construct activities and avoidance of using particular noisy PMEs during examination period, the predicted construction noise levels at the NSRs during non-restricted hours would comply with the noise criteria set out in EIAO-TM.

Construction Noise Impact during Restricted Hours

4.5.43 The Contractor should avoid works to be carried out within restricted hours as far as practicable. However, it is envisaged that some construction works which are listed in Section 4.5.6 would cause not only serious interruption or disruption to road or rail traffic, but also the safety concern to pedestrians and drivers. Therefore, some works are unavoidably required to be conducted during restricted hours. In addition, removal of debris and rocks for operation of TBM would be carried out in restricted hours. Nevertheless, it is the Contractor’s responsibility to ensure the compliance of noise generated from any construction activities that are unavoidable to be conducted during restricted hours (i.e. 1900 – 0700 hours) with the NCO and the relevant TMs. The Contractor should submit CNP application to the Noise Control Authority and abide by any conditions stated in the CNP, should one be issued.

4.6 Operational Phase - Fixed Plant Noise Impact Assessment

Assessment Methodology – Fixed Plant Noise

4.6.1 Given that the noise specifications of the proposed fixed plant items are not available during the EIA Study, the maximum allowable sound power levels were therefore determined for future detailed design of the fixed plant. For the assessment of noise from the fixed plant, the Max. SWLs of the identified fixed noise sources were determined by adopting standard acoustics principles. The following formula was used for calculating the Max. SWLs of the fixed plant:

SPL = Max SWL – DC + FC + BC

where

SPL	Sound Pressure Level, in dB(A)
Max SWL	Maximum Allowable Sound Power Level , in dB(A)
DC	Distance Attenuation, in dB(A) (i.e. 20 log D + 8 [where D is the distance in metres])
FC	Facade Correction, in dB(A) (i.e. 3 dB(A))
BC	Barrier Correction, in dB(A)

4.6.2 It is assumed that all fixed plant within the same location would be operated at the same time as the worst-case operation mode / scenario. Screening correction offered by buildings or other structures such as proposed stations, ABs and residential buildings was taken into account in calculating the predicted noise levels. Barrier correction of -10 dB(A) was applied if the direct line of sight between the noise source and NSR is blocked by buildings or natural terrains, while a barrier correction of -5 dB(A) was applied for NSR do not have direct line of sight to the fixed plant. A positive 3 dB(A) was added to predicted noise levels at the NSRs due to the façade effect.

4.6.3 Corrections of tonality, intermittency or impulsiveness were not included owing to the lack of design/supplier information at the time of preparing the EIA study. If the noise exhibits any of these characteristics during detailed design or operation of the plant, the noise limit of the plants should be reduced in accordance with the recommendation given in IND-TM.

4.6.4 Other than the potential fixed plant noise impact arising from the Project, cumulative fixed plant noise may also contribute from the existing and planned fixed plant noise sources of other railway projects. Existing/Planned fixed plant sources of other railway projects may include:

· Existing fixed plant sources at PHD;

· Existing ventilation louvers at KSR Station on TML; and

· Fixed plant sources on the Lok Ma Chau Spur Line (LMCSL) of EAL.

4.6.5 Cumulative fixed plant noise impacts from other railway projects were assessed quantitatively.

Source of Impact – Fixed Plant Noise

4.6.6 The major fixed plant noise sources would be the new electrical and mechanical (E&M) equipment to be installed in the proposed stations, NTD and ABs. It is expected that most of the fixed noise sources would be housed within plant rooms, which would be effective in most cases for minimising fixed plant noise impact. In NTD, fixed noise sources would comprise ventilation fans, traction substation and plants associated with building and maintenance services including a train wash, running maintenance track, lifting track, workshop, a loco shed, plantrooms to support the operation of NOL. Loco shed, train wash, running maintenance track, lifting track and workshop will be located under the concrete deck of the NTD and away from the depot's ingress/outgress/openings, such that noise impact from these facilities to surroundings are considered minimal. Other fixed noise sources such as traction substation, a ventilation building, louvres and cooling towers which will be located outside the concrete deck were included in the fixed plant noise assessment. The operational modes of the fixed plants have been confirmed by railway operation professionals.

4.6.7 It should be noted that the locations and the number of the fixed plant sources would be subject to change during the design evolvement of the Project in the later stage (e.g. detailed design stage). In addition, the blocking layouts of planned developments in the vicinity of the Project were yet to be available during the EIA stage. Nevertheless, a preliminary fixed plant noise assessment was conducted, following the assessment methodology stated in Section 4.6.1, to estimate the maximum allowable SWLs of the fixed plant noise sources. The design of fixed noise sources should be further reviewed by Engineer/Contractor to ensure the compliance of NCO and EIAO-TM criteria in the detailed design stage or fitting-out stage and after the development layouts of planned development in the vicinity of the Project being finalized. Due considerations should be given to locate major plants and noisy activities far away from depot's ingress/outgress/openings, and quieter plants and quieter designs should also be adopted during detailed design stage.

4.6.8 Locations of fixed noise sources and the relevant concerned NSRs are shown in Figure Nos. C1603/C/NOL/ACM/M52/390 to 402. The validity of the inventory and locations of the fixed noise sources was confirmed with the Project Engineer.

4.6.9 The maximum SWLs of the fixed plant noise sources of the Project are presented in Table 4.10. Detailed noise calculations for daytime and evening (i.e. 0700 – 2300 hours) and night-time (i.e. 2300 – 0700 hours) operations are shown in Appendix 4.11. The predicted noise impacts at different NAPs with various representative floor levels are presented in Appendix 4.13.

Table 4.10 Predicted Maximum Allowable SWL for Planned Noise Source

Location	Fixed Plant Source ID	Fixed Plant Source	Maximum Allowable SWL during Daytime/Evening Period, dB(A)	Maximum Allowable SWL during Night-time Period, dB(A)
Kam Sheung Road Station	K01a	Ventilation Louvre	72	61
	K01b	Ventilation Louvre	73	62
	K01c	Ventilation Louvre	73	62
	K02	Ventilation Louvre at Transformer (Tx) Room	83	72
	K03	Ventilation Louvre at Transformer (Tx) Room	71	60
	K04	Ventilation Louvre at Transformer (Tx) Room	83	72
	K05	Ventilation Louvre at Transformer (Tx) Room	71	60
	K06	Ventilation Louvre at Transformer (Tx) Room	83	72
	K07	Ventilation Louvre at Transformer (Tx) Room	71	60
	K08	Ventilation Louvre at Transformer (Tx) Room	83	72
	K09	Ventilation Louvre at Transformer (Tx) Room	76	65
	K09a	Ventilation Louvre	73	62
	K09b	Ventilation Louvre	73	62
	K09c	Ventilation Louvre	74	63
	K09d	Chiller Plantroom Fresh Air Intake	74	63
	K10	Ventilation Louvre	81	70
	K10a	Ventilation Louvre	69	58
	K10b	Ventilation Louvre	71	60
	K10c	Ventilation Louvre	71	60
	K10d	Ventilation Louvre	71	60
	K11	Ventilation Louvre at Transformer (Tx) Room	71	60
	K12	Ventilation Louvre at Transformer (Tx) Room	71	60
	K13	Ventilation Louvre at Transformer (Tx) Room	71	60
	K14	Ventilation Louvre at Transformer (Tx) Room	71	60
	K15	Ventilation Louvre at Transformer (Tx) Room	71	60
	K16	Ventilation Louvre at Transformer (Tx) Room	71	60
	K17	Ventilation Louvre at Transformer (Tx) Room	71	60
	K18	Ventilation Louvre at Transformer (Tx) Room	71	60
	K19	Ventilation Louvre	86	75
	K20	Ventilation Louvre	88	77
	K20a	Ventilation Louvre	79	68
	K21	Ventilation Louvre	79	68
	K22	Ventilation Louvre	86	75
	K22a	Ventilation Louvre	81	70
	K22b	Ventilation Louvre	81	70
	K22c	Ventilation Louvre	83	72
	K23	Ventilation Louvre	86	75
	K24	Ventilation Louvre	86	75
	K25	Ventilation Louvre	86	75
	K26	Ventilation Louvre	86	75
	K27	Ventilation Louvre	85	74
	K27a	Ventilation Louvre	83	72
	K28	Ventilation Louvre	88	77
	K29	Ventilation Louvre	88	77
	K30	Ventilation Louvre	85	74
	K30a	Ventilation Louvre	69	58
	K31	Ventilation Louvre	85	74
	K31a	Ventilation Louvre	66	55
	K31b	Ventilation Louvre	66	55
	K31c	Ventilation Louvre	81	70
	K31d	Ventilation Louvre	83	72
	K32	Cooling Tower (Discharge Louvre)	88	77
	K33	Cooling Tower (Discharge Louvre)	88	77
	K34	Cooling Tower (Discharge Louvre)	88	77
	K35	Cooling Tower (Intake Louvre)	87	76
	K35a	Ventilation Louvre	83	72
	K35b	Ventilation Louvre	81	70
	K37	Ventilation Louvre	88	77
	K38	Ventilation Louvre	88	77
	K39	Ventilation Louvre	88	77
	K40	Ventilation Louvre	88	77
	K41	Ventilation Louvre	86	75
	K41a	Ventilation Louvre	77	66
	K42	Ventilation Louvre	86	75
K42a	Ventilation Louvre	71	60
K43	Ventilation Louvre	86	75
K44	AC Outdoor Unit	77	66
K45	AC Outdoor Unit	77	66
K45a	Ventilation Louvre	83	72
K46	AC Outdoor Unit	77	66
K47	AC Outdoor Unit	76	65
K48	Ventilation Louvre	86	75
K48a	Ventilation Louvre	81	70
K48b	Ventilation Louvre	81	70
K49	Ventilation Louvre	88	77
K50	Ventilation Louvre	88	77
K51	Ventilation Louvre	88	77
K51a	Ventilation Louvre	81	70
K51b	Ventilation Louvre	81	70
K52	Ventilation Louvre	88	77
K53	Ventilation Louvre	85	74
K54	Ventilation Louvre	85	74
K55	Ventilation Louvre	85	74
K56	Ventilation Louvre	85	74
K57	AC Outdoor Unit	85	74
Au Tau Station	A01	Ventilation Louvre	90	80
	A02	Ventilation Louvre	90	80
	A03	Ventilation Louvre	90	80
	A03a	Ventilation Louvre	80	70
	A04	Ventilation Louvre	84	74
	A04a	Ventilation Louvre	80	70
	A05	Ventilation Louvre	80	70
	A05a	Ventilation Louvre	80	70
	A05b	Ventilation Louvre	85	75
	A05c	Ventilation Louvre	85	75
	A06	Ventilation Louvre	89	79
	A07	Ventilation Louvre	89	79
	A08	Cooling Tower (Intake Louvre)	86	76
	A09	Cooling Tower (Discharge Louvre)	95	85
	A10	Cooling Tower (Discharge Louvre)	95	85
	A11	Cooling Tower (Discharge Louvre)	95	85
	A12	Ventilation Louvre	90	80
	A12a	Ventilation Louvre	85	75
	A13	Ventilation Louvre	90	80
	A13a	Ventilation Louvre	90	80
	A14	Ventilation Louvre	85	75
	A14a	Ventilation Louvre	90	80
	A15	Ventilation Louvre	85	75
	A15a	Ventilation Louvre	90	80
	A15b	Ventilation Louvre	90	80
	A15c	Ventilation Louvre	85	75
	A15d	Ventilation Louvre	85	75
	A16	AC Outdoor Unit	90	80
	A16a	Ventilation Louvre	85	75
	A16b	Ventilation Louvre	85	75
	A17	AC Outdoor Unit	85	75
	A17a	Ventilation Louvre	85	75
	A19	Ventilation Louvre at Transformer (Tx) Room	82	72
	A20	Ventilation Louvre at Tx Room	82	72
	A21	Ventilation Louvre at Tx Room	82	72
	A22	Ventilation Louvre at Tx Room	80	70
	A23	Ventilation Louvre at Tx Room	80	70
	A24	Ventilation Louvre at Tx Room	82	72
	A25	Ventilation Louvre at Tx Room	80	70
	A26	Ventilation Louvre at Tx Room	82	72
	A26a	Ventilation Louvre	85	75
	A27	Ventilation Louvre	89	79
	A28	Ventilation Louvre	87	77
	A28a	Ventilation Louvre	80	70
	A28b	Ventilation Louvre	80	70
	A29	Ventilation Louvre	87	77
	A30	Ventilation Louvre at Tx Room	77	67
	A31	Ventilation Louvre at Tx Room	80	70
	A32	Ventilation Louvre at Tx Room	78	68
	A33	Ventilation Louvre at Tx Room	80	70
	A34	Ventilation Louvre at Tx Room	78	68
	A35	Ventilation Louvre at Tx Room	80	70
	A36	Ventilation Louvre at Tx Room	78	68
	A37	Ventilation Louvre at Tx Room	80	70
	A37a	Ventilation Louvre	80	70
	A37b	Ventilation Louvre	80	70
	A37c	Ventilation Louvre	80	70
	A37d	Ventilation Louvre	82	72
	A37e	Ventilation Louvre	82	72
	A38	AC Outdoor Unit	87	77
	A39	Ventilation Louvre	86	76
	A40	Ventilation Louvre	86	76
	A41	Ventilation Louvre	87	77
Ngau Tam Mei Station	N01	Ventilation Louvre	79	74
	N02	Ventilation Louvre	79	74
	N03	Ventilation Louvre	79	74
	N04	Ventilation Louvre at Transformer (Tx) Room	77	72
	N05	Ventilation Louvre at Transformer (Tx) Room	77	72
	N06	Ventilation Louvre at Transformer (Tx) Room	77	72
	N07	Ventilation Louvre at Transformer (Tx) Room	77	72
	N08	Ventilation Louvre	80	75
	N09	Ventilation Louvre at Transformer (Tx) Room	77	72
	N10	Ventilation Louvre at Transformer (Tx) Room	77	72
	N11	Ventilation Louvre at Transformer (Tx) Room	77	72
	N12	Ventilation Louvre at Transformer (Tx) Room	82	77
	N12a	Ventilation Louvre	78	73
	N12b	Ventilation Louvre	78	73
	N12c	Ventilation Louvre	78	73
	N12d	Ventilation Louvre	80	75
	N13	AC Outdoor Unit	80	75
	N14	AC Outdoor Unit	80	75
	N15	Ventilation Louvre at Transformer (Tx) Room	77	72
	N15a	Ventilation Louvre	78	73
	N16	Ventilation Louvre at Transformer (Tx) Room	77	72
	N17	Ventilation Louvre	80	75
	N18	Ventilation Louvre at Transformer (Tx) Room	77	72
	N19	Ventilation Louvre at Transformer (Tx) Room	77	72
	N20	Ventilation Louvre	80	75
	N20a	Ventilation Louvre	78	73
	N21	Ventilation Louvre at Transformer (Tx) Room	77	72
	N21a	Ventilation Louvre	78	73
	N22	Ventilation Louvre at Transformer (Tx) Room	77	72
	N23	Ventilation Louvre at Transformer (Tx) Room	77	72
	N24	Ventilation Louvre at Transformer (Tx) Room	77	72
	N25	Ventilation Louvre	79	74
	N26	Ventilation Louvre	80	75
	N27	Ventilation Louvre	77	72
	N28	Ventilation Louvre	79	74
	N29	Ventilation Louvre	79	74
	N30	Ventilation Louvre	77	72
	N30a	Ventilation Louvre	78	73
	N31	Ventilation Louvre	79	74
	N31a	Ventilation Louvre	82	77
	N31b	Ventilation Louvre	82	77
	N31c	Ventilation Louvre	82	77
	N31d	Ventilation Louvre	82	77
	N32	Ventilation Louvre	80	75
	N32a	Ventilation Louvre	78	73
	N32b	Ventilation Louvre	78	73
	N33	Ventilation Louvre	80	75
	N34	Ventilation Louvre	80	75
	N34a	Ventilation Louvre	73	68
	N35	Ventilation Louvre	82	77
	N36	Ventilation Louvre	80	75
	N37	Ventilation Louvre	80	75
	N38	Ventilation Louvre	68	63
	N39	Ventilation Louvre	80	75
	N39a	Ventilation Louvre	75	70
	N40	Ventilation Louvre	78	73
	N40a	Ventilation Louvre	78	73
	N40b	Ventilation Louvre	82	77
	N41	Ventilation Louvre	75	70
	N41a	Ventilation Louvre	72	67
	N43	Ventilation Louvre	72	67
	N44	Ventilation Louvre	76	71
	N45	Ventilation Louvre	72	67
	N45a	Ventilation Louvre	68	63
N45b	Ventilation Louvre	68	63
N46	Ventilation Louvre	76	71
N46a	Ventilation Louvre	75	70
N47	Ventilation Louvre	76	71
N47a	Ventilation Louvre	75	70
N47b	Ventilation Louvre	75	70
N47c	Ventilation Louvre	75	70
N48	Ventilation Louvre	79	74
N49	Ventilation Louvre	76	71
N50	Cooling Tower (Intake Louvre)	81	76
N50a	Cooling Tower (Discharge Louvre)	81	76
N51	Cooling Tower (Intake Louvre)	81	76
N52	Ventilation Louvre	78	73
N53	Ventilation Louvre	79	74
N54	Ventilation Louvre	79	74
N55	Ventilation Louvre	79	74
N56	Ventilation Louvre	79	74
Ngau Tam Mei Depot	NTD01	Ventilation Louvre	78	73
	NTD02	Ventilation Louvre	76	71
	NTD03	Ventilation Louvre	75	70
	NTD04	Ventilation Louvre	75	70
	NTD05	Ventilation Louvre	75	70
	NTD06	Ventilation Louvre	76	71
	NTD07	Ventilation Louvre	75	70
	NTD08	Ventilation Louvre	75	70
	NTD09	Ventilation Louvre	70	65
	NTD10	Ventilation Louvre	70	65
	NTD11	Ventilation Louvre	70	65
	NTD12	Ventilation Louvre	75	70
	NTD13	Ventilation Louvre	79	74
	NTD14	Ventilation Louvre	77	72
	NTD15	Ventilation Louvre	77	72
	NTD15a	Transformer	80	75
	NTD16	Ventilation Louvre	80	75
	NTD16a	Transformer	80	75
	NTD17	Ventilation Louvre	77	72
	NTD18	Ventilation Louvre	73	68
	NTD19	Ventilation Louvre	73	68
	NTD20	Ventilation Louvre	73	68
	NTD21	Ventilation Louvre	78	73
	NTD22	Ventilation Louvre	80	75
	NTD23	Ventilation Louvre	80	75
	NTD24	Ventilation Louvre	76	71
	NTD25	Ventilation Louvre	80	75
	NTD26	Ventilation Louvre	70	65
	NTD27	Ventilation Louvre	70	65
	NTD28	Ventilation Louvre	75	70
	NTD29	Ventilation Louvre	75	70
	NTD30	Ventilation Louvre	83	78
	NTD31	Ventilation Louvre	80	75
	NTD32	Ventilation Louvre	82	77
	NTD33	Ventilation Louvre	81	76
	NTD34	Ventilation Louvre	80	75
	NTD35	Ventilation Louvre	85	80
	NTD36	Ventilation Louvre	85	80
	NTD37	Ventilation Louvre	85	80
	NTD38	Ventilation Louvre	85	80
	NTD39	Ventilation Louvre	85	80
	NTD40	Ventilation Louvre	80	75
	NTD41	Ventilation Louvre	75	70
	NTD42	Ventilation Louvre	75	70
	NTD43	Ventilation Louvre	75	70
	NTD44	Ventilation Louvre	75	70
	NTD45	Ventilation Louvre	75	70
	NTD46	Ventilation Louvre	75	70
	NTD47	Ventilation Louvre	75	70
	NTD48	Ventilation Louvre	70	65
	NTD49	Ventilation Louvre	70	65
	NTD50	Ventilation Louvre	70	65
	NTD51	Ventilation Louvre	80	75
	NTD52	Ventilation Louvre	73	68
	NTD53	Ventilation Louvre	68	63
	NTD54	Ventilation Louvre	73	68
	NTD55	Ventilation Louvre	85	80
	NTD56	Ventilation Louvre	72	67
	NTD57	Ventilation Louvre	78	73
	NTD58	Ventilation Louvre	73	68
	NTD59	Ventilation Louvre	70	65
	NTD60	Ventilation Louvre	69	64
	NTD61	Ventilation Louvre	71	66
	NTD62	Ventilation Louvre	80	75
NTD63	Ventilation Louvre	78	73
NTD64	Ventilation Louvre	72	67
NTD65	Ventilation Louvre	72	67
NTD66	Ventilation Louvre	74	69
NTD67	Ventilation Louvre	73	68
NTD68	Ventilation Louvre	75	70
NTD69	Ventilation Louvre	70	65
NTD70	Ventilation Louvre	75	70
NTD71	Ventilation Louvre	75	70
NTD72	Ventilation Louvre	78	73
NTD73	Ventilation Louvre	75	70
NTD74	Ventilation Louvre	75	70
NTD75	Ventilation Louvre	75	70
NTD76	Ventilation Louvre	75	70
NTD77	Ventilation Louvre	77	72
NTD78	Ventilation Louvre	75	70
NTD79	Ventilation Louvre	76	71
NTD80	Ventilation Louvre	75	70
NTD81	Ventilation Louvre	75	70
NTD82	Ventilation Louvre	75	70
NTD83	Ventilation Louvre	75	70
NTD84	Ventilation Louvre	75	70
NTD85	Ventilation Louvre	75	70
NTD86	Ventilation Louvre	77	72
NTD87	Ventilation Louvre	75	70
NTD88	Ventilation Louvre	74	69
NTD89	Ventilation Louvre	73	68
NTD90	Ventilation Louvre	72	67
NTD91	Ventilation Louvre	75	70
NTD92	Ventilation Louvre	74	69
NTD93	Ventilation Louvre	78	73
NTD94	Ventilation Louvre	73	68
NTD94a	Ventilation Louvre	73	68
NTD95	Ventilation Louvre	73	68
NTD96	Ventilation Louvre	74	69
NTD97	Cooling Tower	80	75
NTD98	Cooling Tower	80	75
NTD99	Cooling Tower	80	75
NTD100	Ventilation Louvre	80	75
NTD101	Ventilation Louvre	80	75
NTD102	Ventilation Louvre	75	70
NTD103	Ventilation Louvre	75	70
NTD104	Ventilation Louvre	83	78
NTD105	Ventilation Louvre	73	68
NTD106	Ventilation Louvre	75	70
NTD107	Ventilation Louvre	72	67
NTD108	Ventilation Louvre	82	77
NTD109	Ventilation Louvre	82	77
NTD110	Ventilation Louvre	85	80
NTD111	Ventilation Louvre	77	72
NTD112	Ventilation Louvre	77	72
NTD113	Ventilation Louvre	77	72
NTD114	Ventilation Louvre	85	80
NTD115	Ventilation Louvre	85	80
San Tin Station	S01	Ventilation Louvre	88	80
	S02	Ventilation Louvre	88	80
	S03	Ventilation Louvre at Transformer (Tx) Room	88	80
	S04	Ventilation Louvre at Transformer (Tx) Room	88	80
	S05	Ventilation Louvre at Transformer (Tx) Room	88	80
	S06	Ventilation Louvre	88	80
	S07	Ventilation Louvre at Transformer (Tx) Room	88	80
	S08	Ventilation Louvre at Transformer (Tx) Room	88	80
	S09	Ventilation Louvre at Transformer (Tx) Room	88	80
	S09a	Ventilation Louvre	88	80
	S09b	Ventilation Louvre	93	85
	S10	Ventilation Louvre	89	81
	S10a	Ventilation Louvre	88	80
	S11	Ventilation Louvre	96	88
	S12	Ventilation Louvre	86	78
	S13	Ventilation Louvre	85	77
	S14	Ventilation Louvre	85	77
	S14a	Ventilation Louvre	83	75
	S14b	Ventilation Louvre	81	73
	S14c	Ventilation Louvre	81	73
	S15	Ventilation Louvre	87	79
	S15a	Ventilation Louvre	80	72
	S15b	Ventilation Louvre	80	72
	S16	Ventilation Louvre	88	80
	S16a	Ventilation Louvre	78	70
	S17	Ventilation Louvre	85	77
	S18	Ventilation Louvre	85	77
	S19	Ventilation Louvre	84	76
	S20	Ventilation Louvre	86	78
	S20a	AC Outdoor Unit	88	77
Kwu Tung Station on NOL	KT1	Ventilation Louvre	82	70
	KT2	Ventilation Louvre	82	70
	KT3	Ventilation Louvre	82	70
	KT4	Ventilation Louvre	82	70
	KT5	Ventilation Louvre	82	70
	KT6	Ventilation Louvre	82	70
	KT7	Ventilation Louvre	82	70
	KT8	Ventilation Louvre	82	70
	KT9	Ventilation Louvre	82	70
	KT10	Ventilation Louvre	82	70
	KT11	Ventilation Louvre	85	75
	KT12	Ventilation Louvre	85	75
	KT13	Ventilation Louvre	80	70
	KT14	Ventilation Louvre	80	70
	KT15	Ventilation Louvre	80	70
	KT16	Ventilation Louvre	81	72
	KT17	Ventilation Louvre	81	72
	KT18	Ventilation Louvre	80	71
	KT19	Ventilation Louvre	80	71
	KT20	Ventilation Louvre	80	70
	KT21	Ventilation Louvre	80	68
	KT22	Ventilation Louvre	80	68
	KT23	Ventilation Louvre	80	68
	KT24	Ventilation Louvre	80	68
	KT25	Ventilation Louvre	80	68
	KT26	Ventilation Louvre	80	70
	KT27	Ventilation Louvre	85	75
	KT28	Ventilation Louvre	85	76
	KT29	Ventilation Louvre	85	76
	KT30	Ventilation Louvre	85	76
	KT31	Ventilation Louvre	85	75
	KT32	Ventilation Louvre	85	75
	KT33	Ventilation Louvre	80	72
	KT34	Ventilation Louvre	80	72
	KT35	Ventilation Louvre	80	72
	KT36	Ventilation Louvre	80	72
	KT37	Ventilation Louvre	80	72
	KT38	Ventilation Louvre	80	72
	KT39	Ventilation Louvre	80	71
	KT40	Ventilation Louvre	80	71
	KT41	Ventilation Louvre	80	69
	KT42	Ventilation Louvre	80	69
	KT43	Ventilation Louvre	80	69
	KT44	Ventilation Louvre	80	68
	KT45	Ventilation Louvre	80	68
	KT46	Ventilation Louvre	80	68
	KT47	Ventilation Louvre	80	68
	KT48	Ventilation Louvre	80	74
	KT49	Ventilation Louvre	85	75
	KT50	Ventilation Louvre	85	75
	KT51	Ventilation Louvre	85	75
	KT52	Ventilation Louvre	85	75
	KT53	Ventilation Louvre	80	70
	KT54	Ventilation Louvre	83	73
	KT55	Ventilation Louvre	85	75
	KT56	Ventilation Louvre	85	75
	KT57	Ventilation Louvre	85	75
	KT58	Ventilation Louvre	85	75
	KT59	Ventilation Louvre	85	75
	KT60	Ventilation Louvre	81	71
	KT61	Ventilation Louvre	81	71
	KT62	Ventilation Louvre	81	71
	KT63	Ventilation Louvre	80	70
	KT64	Ventilation Louvre	80	70
KT65	Ventilation Louvre	80	70
KT66	Ventilation Louvre	80	70
KT67	Ventilation Louvre	80	70
KT68	Ventilation Louvre	82	72
KT69	Ventilation Louvre	81	71
KT70	Ventilation Louvre	81	71
KT71	Ventilation Louvre	81	70
KT72	Ventilation Louvre	81	70
KT73	Ventilation Louvre	81	71
KT74	Ventilation Louvre	81	71
Shui Mei Road Ancillary Building	SMA-1	Ventilation Louvre	68	60
	SMA-1a	Ventilation Louvre	68	64
	SMA-2	Ventilation Louvre	67	65
	SMA-3	Ventilation Louvre at Tx Room	72	72
	SMA-4	Ventilation Louvre at Tx Room	72	72
	SMA-5	Ventilation Louvre at Tx Room	68	68
	SMA-6	Ventilation Louvre at Tx Room	68	68
	SMA-7	Ventilation Louvre at Tx Room	72	72
	SMA-8	Ventilation Louvre at Tx Room	72	72
	SMA-9	Ventilation Louvre at Tx Room	72	72
	SMA-10	Ventilation Louvre at Tx Room	72	72
	SMA-10a	Ventilation Louvre	79	79
	SMA-11	Ventilation Louvre	79	79
	SMA-11a	Ventilation Louvre	79	79
	SMA-11b	Ventilation Louvre	79	79
	SMA-11c	Ventilation Louvre	79	79
	SMA-11d	Ventilation Louvre	70	62
	SMA-11e	Ventilation Louvre	70	62
	SMA-11f	Ventilation Louvre	70	65
	SMA-11g	Ventilation Louvre	70	66
	SMA-12	Ventilation Louvre	71	70
	SMA-13	AC Outdoor Unit	72	70
Pok Wai Ancillary Building	PWA-1	Ventilation Louvre	89	79
	PWA-2	Ventilation Louvre	89	79
	PWA-3	Ventilation Louvre	89	79
	PWA-4	Ventilation Louvre at Tx Room	82	72
	PWA-5	Ventilation Louvre at Tx Room	82	72
	PWA-6	Ventilation Louvre at Tx Room	82	72
	PWA-7	Ventilation Louvre at Tx Room	82	72
	PWA-8	Ventilation Louvre at Tx Room	82	72
	PWA-9	Ventilation Louvre at Tx Room	82	72
	PWA-10	Ventilation Louvre at Tx Room	82	72
	PWA-11	Ventilation Louvre at Tx Room	82	72
	PWA-11a	Ventilation Louvre	85	75
	PWA-12	Ventilation Louvre	75	65
	PWA-13	Ventilation Louvre	84	74
	PWA-14	Ventilation Louvre	81	71
	PWA-15	Ventilation Louvre	81	71
	PWA-16	Ventilation Louvre	71	61
	PWA-16a	Ventilation Louvre	70	60
	PWA-16b	Ventilation Louvre	80	70
	PWA-17	AC Outdoor Unit	85	75
Long Ha Tsuen Ancillary Building	LHA-1	Ventilation Louvre at Tx Room	87	82
	LHA-2	Ventilation Louvre at Tx Room	87	82
	LHA-3	Ventilation Louvre at Tx Room	87	82
	LHA-4	Ventilation Louvre at Tx Room	87	82
	LHA-4a	Ventilation Louvre	82	77
	LHA-4b	Ventilation Louvre	82	77
	LHA-5	Ventilation Louvre	82	77
	LHA-5a	Ventilation Louvre	82	77
	LHA-5b	Ventilation Louvre	82	77
	LHA-6	Ventilation Louvre	82	77
	LHA-6a	Ventilation Louvre	82	77
	LHA-6b	Ventilation Louvre	82	77
	LHA-6c	Ventilation Louvre	82	77
	LHA-7	AC Outdoor Unit	91	86
San Tin Ancillary Building	SNA-1	Ventilation Louvre	88	80
	SNA-1a	Ventilation Louvre	88	80
	SNA-2	Ventilation Louvre	88	80
	SNA-3	Ventilation Louvre	88	80
	SNA-4	Ventilation Louvre at Tx Room	82	74
	SNA-5	Ventilation Louvre at Tx Room	82	74
	SNA-6	Ventilation Louvre at Tx Room	82	74
	SNA-7	Ventilation Louvre at Tx Room	82	74
	SNA-8	Ventilation Louvre at Tx Room	82	74
	SNA-9	Ventilation Louvre at Tx Room	82	74
	SNA-10	Ventilation Louvre at Tx Room	82	74
	SNA-11	Ventilation Louvre at Tx Room	82	74
	SNA-11a	Ventilation Louvre	82	74
	SNA-12	Ventilation Louvre	88	80
	SNA-12a	Ventilation Louvre	83	75
	SNA-12b	Ventilation Louvre	83	75
	SNA-13	AC Outdoor Unit	94	86
	SNA-13a	Ventilation Louvre	83	75
	SNA-13b	Ventilation Louvre	82	74
	SNA-13c	Ventilation Louvre	82	74
	SNA-13d	Ventilation Louvre	82	74
	SNA-14	Ventilation Louvre	82	74
Ka Lung Road Ancillary Building	KLA-1	Ventilation Louvre at Tx Room	96	88
	KLA-2	Ventilation Louvre at Tx Room	96	88
	KLA-3	Ventilation Louvre at Tx Room	96	88
	KLA-4	Ventilation Louvre at Tx Room	96	88
	KLA-4a	Ventilation Louvre	93	85
	KLA-4b	Ventilation Louvre	93	85
	KLA-4c	Ventilation Louvre	93	85
	KLA-4d	Ventilation Louvre	93	85
	KLA-4e	Ventilation Louvre	93	85
	KLA-4f	Ventilation Louvre	93	85
	KLA-4g	Ventilation Louvre	93	85
	KLA-4h	Ventilation Louvre	93	85
	KLA-4i	Ventilation Louvre	93	85
	KLA-4j	Ventilation Louvre	96	88
	KLA-4k	Ventilation Louvre	96	88
	KLA-5	AC Outdoor Unit	97	88
Kwu Tung Road Ancillary Building	KTA-1	Ventilation Louvre	95	88
	KTA-1a	Ventilation Louvre	93	86
	KTA-1b	Ventilation Louvre	93	86
	KTA-2	Ventilation Louvre at Tx Room	95	85
	KTA-3	Ventilation Louvre at Tx Room	95	85
	KTA-4	Ventilation Louvre	95	85
	KTA-5	Ventilation Louvre at Tx Room	95	85
	KTA-5a	Ventilation Louvre	95	88
	KTA-6	Ventilation Louvre at Tx Room	95	85
	KTA-7	Ventilation Louvre at Tx Room	95	85
	KTA-7a	Ventilation Louvre	95	88
	KTA-7b	Ventilation Louvre	95	88
	KTA-8	Ventilation Louvre at Tx Room	95	85
	KTA-9	Ventilation Louvre at Tx Room	95	85
	KTA-9a	Ventilation Louvre	95	88
	KTA-9b	Ventilation Louvre	95	88
	KTA-10	Ventilation Louvre	95	88
	KTA-10a	Ventilation Louvre	95	88
	KTA-10b	Ventilation Louvre	95	88
	KTA-11	AC Outdoor Unit	97	90
Pak Shek Au Ancillary Building	PAA-1	Ventilation Louvre at Tx Room	87	81
	PAA-2	Ventilation Louvre at Tx Room	87	81
	PAA-3	Ventilation Louvre at Tx Room	87	81
	PAA-4	Ventilation Louvre at Tx Room	87	81
	PAA-4a	Ventilation Louvre	87	81
	PAA-4b	Ventilation Louvre	87	81
	PAA-4c	Ventilation Louvre	87	81
	PAA-4d	Ventilation Louvre	87	81
	PAA-4e	Ventilation Louvre	87	81
	PAA-4f	Ventilation Louvre	87	81
	PAA-4g	Ventilation Louvre	87	81
	PAA-4h	Ventilation Louvre	87	81
	PAA-4i	Ventilation Louvre	89	83
	PAA-5	AC Outdoor Unit	91	85
	PAA-6	Ventilation Louvre at Tx Room	93	87
	PAA-7	Ventilation Louvre	87	81
	PAA-8	Ventilation Louvre	87	81
	PAA-9	Ventilation Louvre	87	81
	PAA-10	Ventilation Louvre	87	81
	PAA-11	Ventilation Louvre	87	81
	PAA-12	Ventilation Louvre	87	81
	PAA-12a	Ventilation Louvre	87	81
	PAA-13	Ventilation Louvre at Tx Room	93	87
	PAA-14	Ventilation Louvre	87	81
	PAA-15	Ventilation Louvre	87	81
	PAA-16	Ventilation Louvre	87	81
	PAA-17	Ventilation Louvre	87	81
	PAA-18	Ventilation Louvre	87	81
	PAA-19	Ventilation Louvre	87	81
	PAA-20	Ventilation Louvre	93	87
	PAA-21	Ventilation Louvre	93	87
	PAA-22	Ventilation Louvre	87	81
	PAA-23	Ventilation Louvre	87	81
	PAA-24	Ventilation Louvre	93	87
	PAA-25	Ventilation Louvre	93	87
	PAA-26	Ventilation Louvre	87	81
	PAA-27	Ventilation Louvre	93	87
	PAA-28	Ventilation Louvre	93	87
	PAA-29	Ventilation Louvre	87	81
	PAA-30	AC Outdoor Unit	87	81

Mitigation Measure

4.6.10 Based on the preliminary assessment result, the predicted maximum allowable SWLs are in the range of 55 –97dB(A). Relatively low SWLs were predicted for the fixed plant sources at the KSR(NOL) Station, NTM Station, NTD and SMA, due to the conservative assumptions on the NAP locations at the boundaries of the planned development. It is recommended to update the maximum allowable SWLs in later stage of the Project when the detailed design of the fixed plant sources and the building layouts of the planned developments are available.

4.6.11 Nevertheless, the predicted maximum allowable SWLs are considered achievable by selection of proper plant and adoption of acoustic treatment based on the past experience of other similar railway projects. Reference was made to the Fixed Plant Noise Audit Report for South Island Line (East)^[1] for the typical SWLs of fixed plant sources. For example, the measured SWLs of ventilation louvers at Ocean Park Station and its electrical room were in the range of 62 - 86 dB(A) and the measured SWLs of cooling tower at Lee Wing Street Plant Building (LWB) are in the range of 86 – 89 dB(A) without installation of mitigation measures acoustic louvers and noise enclosure. For ventilation louvers, noise mitigation treatments could be provided in the form of acoustic louvers which are available in the market, fitted to the ventilation opening to ensure the compliance of noise levels at NSRs with the stipulated noise criteria. Typical insertion losses of acoustic louvers are in the range of 5 dB(A) to 10 dB(A). For cooling towers, a full noise enclosure with appropriate sound insulation material should be provided to alleviate the noise impact. According to the Appendix IV of “Good Practices on Ventilation System Noise Control” published by EPD, a complete enclosure and a silenced ventilation system could provide more than 20 dB(A) noise reduction. The Contractors should properly design the noise mitigation measures, if required, according to the “Good Practices on Ventilation System Noise Control”.

4.6.12 Fixed Noise Sources Management Plan(s) (FNMP(s)) should be prepared before the issue of tender and before commencement of the installation of fixed plant, subject to the contract arrangement of the Project and agreement with EPD. The FNMP should contain the quantitative fixed noise sources impact assessment based on the best available information, accounting all design measures including noise mitigation measures. The FNMP(s) should be certified by Certified Noise Modelling Professional of HKIQEP or equivalent. In addition, Fixed Noise Audit Report(s) (FNAR) should be prepared before commencement of operation of the Project to demonstrate the compliance of the fixed plant noise sources of the Project with the maximum allowable SWLs determined in this EIA Report, or otherwise approved by the EPD in compliance with the requirements in EIAO-TM having due regard to the characteristics of tonality, impulsiveness and intermittency.

Cumulative Fixed Plant Noise Impact

4.6.13 The fixed plants at PHD, existing KSR(TML) Station, ventilation shafts and planned KTU(EAL) Station on LMCSL were identified as fixed plant noise sources that may pose cumulative fixed plant noise impact to the NSRs in the vicinity of these fixed plants. The cumulative fixed plant noise impacts were evaluated and presented in Appendix 4.11. Adverse cumulative fixed plant noise impact is not expected at the representative NAPs, with details discussed below.

PHD

4.6.14 According to the PHD ERR 2012, there is an existing train wash plant which is located near the Future School site in Kam Tin South Development (Site 1). Cumulative fixed plant noise impact assessment was conducted based on the information of the fixed plant sources presented in the ERR. In addition, other existing fixed plants that are located at more than 300m from the representative NAPs were excluded in the assessment. The prediction results indicated that the cumulative fixed plant noise impacts at the representative NAPs comply with the relevant ANL.

KSR(TML) Station

4.6.15 Fixed noise sources at the existing KSR(TML) Station were identified and SWLs of the fixed noise sources were also determined by noise measurements. The SWL measurement results are presented in Appendix 4.12. Cumulative fixed plant noise impacts were evaluated quantitatively, and the result indicated that the cumulative fixed plant noise impacts at the representative NAPs comply with the relevant ANL.

Ventilation Shafts on LMCSL near KTA and PAA

4.6.16 The KTA and PAA would be located near the ventilation shafts on LMCSL in Kwu Tung area, hence, cumulative fixed plant noise impact would be expected. For the fixed plant noise from the existing ventilation shafts on LMCSL near KTA and PAA, reference was made to Table 7.16 of the approved EIA report for Sheung Shui to Lok Ma Chau Spur Line (LMCSL) (Register No.: AEIAR-052/2002) and Appendix 4.25 of the approved EIA report for NENT NDA (Register No.: AEIAR-175/2013) respectively. Cumulative fixed plant noise impacts were evaluated quantitatively, and the results indicated that the cumulative fixed plant noise impacts at the representative NAPs comply with ANL.

KTU(EAL) Station and Existing EAPs on LMCSL

4.6.17 The KTU(NOL) Station would be located at the north of KTU Station (EAL) and existing EAPs on LMCSL. There are two existing EAPs, namely EAP No. 3 and EAP No. 4, located at the east and the west of future KTU(EAL) Station respectively. Based on the proposed construction arrangement, EAP No. 4 would be demolished before the operation of the Project. Hence, no cumulative fixed plant noise impact would be expected from EAP No. 4. For the fixed plant noise generated from the existing EAP No. 3, reference was made to the Appendix 4.25 of the approved EIA report for NENT NDA. For the fixed plant noise generated from the future KTU(EAL) Station, reference was made to the LMCSL ERR 2021^[2]. Cumulative fixed plant noise impact was evaluated quantitatively, and the results, which presented in Appendix 4.11, indicated that the cumulative fixed plant noise impacts at the representative NAPs comply with ANL.

4.7 Operational Phase - Rail Noise Impact Assessment

Source of Impact

4.7.1 The NOL alignment would be located underground except a short trough section at the tunnel portal connecting to NTD. The trough section has been minimised as far as practicable to satisfy fire services requirement and tracks with turnouts at this trough section would also be covered by noise canopies and vertical louvre walls with natural ventilation feature. The locations of trough section, noise canopies and vertical louvre walls are shown in Appendix 4.14. 8-car type SP1900 or other train type with equivalent or better noise performance will be used in NOL and would shunt from tunnel portal to NTD at a speed of about 20kph and at a train frequency of 5 trains per 30mins per direction during both daytime and night-time periods. The nearest existing NSR (i.e. Village House near Wang Ping Shan South Road) would be located at about 80m from the trough section covered by noise canopies. With provision of noise canopies, there would be no direct line of sight from any NSRs to the airborne railway noise sources at the trough section and in NTD. Furthermore, the NTD has been designed with concrete deck and vertical walls, where the internal surfaces would be lined with noise absorption materials with due consideration of engineering and operation constraints, to avoid noise nuisance to the NSRs nearby from train operation within NTD. Considering both the train speed and train frequency are relatively low and there would be no direct line of sight from any NSRs to the airborne railway noise sources, therefore, adverse airborne railway noise impact due to the operation of the Project is not anticipated.

4.7.2 Ancillary buildings would be constructed aboveground along the tunnel for emergency access and ventilation purpose. The ancillary buildings would be concrete structures and fitted with ventilation equipment, metal ducting and louvers at the ventilation openings. It is anticipated that there would be no direct air-borne noise transmission paths from the tunnel to outdoor via the ancillary buildings. Any noise from louvres of the ancillary facilities, considered as noise from fixed plant sources, would be controlled under NCO through adoption of appropriate measures such as absorptive lining and splitter attenuator. High performance attenuators could be installed in the ventilation air duct system to control ventilation fan noise and also substantially reduce train noise emission, if any, to the outside.

4.8 Environmental Monitoring and Audit Requirement

Construction Noise

4.8.1 Noise monitoring is recommended as part of the environmental monitoring and audit (EM&A) programme for the construction phase of the Project to check the compliance of the daytime construction noise criteria. The implementation of the recommended mitigation measures for daytime construction activities should also be audited as part of the EM&A programme. Details of the EM&A requirements are provided in the EM&A Manual.

Fixed Plant Noise

4.8.2 Before commencement of the operation of fixed plant sources, FNAR(s) should be prepared, while verification of the noise performance of the fixed plants should be conducted during the testing and commissioning stage. Details of the EM&A programme are provided in a stand-alone EM&A Manual.

Rail Noise

4.8.3 Compliance check on rail noise against NCO criteria should be conducted before the commissioning of the Project. Details of the EM&A programme are provided in a stand-alone EM&A Manual.

4.9 Conclusion

Construction Phase

4.9.1 The construction noise impacts of the Project during normal daytime working hours were predicted according to the plant inventory and construction programme developed by the Project Engineer. All practicable noise mitigation measures, including the use of QPME, deployment of construction noise barriers and enclosures, adoption of quieter construction methods (including use of TBM, large diameter bored piling, MiC, DfMA, silent piling, rubber head poker vibrator), as well as sequencing of construction activities at critical works areas, have been exhausted to minimise the potential construction noise impacts. The assessment results indicated that the mitigated noise levels at all NSRs would comply with the construction noise criteria as set out in EIAO-TM, except that exceedance is anticipated at the planned school site at Kam Tin South Housing Development during examination period. The Contractor should liaise with the representative of the concerned school and/or the Examination Authority to ascertain the exact dates and times of all examination periods during the construction period and should avoid conducting noisy activities during the examination periods if the school is relied on opened windows for ventilation. With the avoidance of particular noisy construction activities during the examination periods, the mitigated construction noise impact at the concerned school would comply with the stipulated noise criterion.

4.9.2 It is recommended that CNMP(s) should be prepared based on the best available information before the issue of tender and the commencement of construction works, subject to the contract arrangement of the Project and agreement with EPD. The plan should include a quantitative construction noise impact assessment with details on the construction method, plant inventory and recommended noise mitigation measures for the future Contractors’ further update on CNMP before commencement of construction works and implementation in order to minimise the construction noise impact and comply with the EIAO-TM. In addition, further review on the cumulative construction noise impact should be conducted as necessary in the later CNMP when the information of the concurrent project is available. The CNMP should be certified by Certified Noise Modelling Professional of HKIQEP or equivalent.

Operational Noise

4.9.3 With the proper selection of fixed plant and adoption of acoustic treatment to achieve the recommended maximum allowable SWLs for the proposed fixed plant, the fixed plant noise impact at the NSRs located in the vicinity of fixed plant sources would comply with the criteria set out in EIAO-TM. If there is any change in engineering design information during detailed design stage or fitting-out stage, the fixed source noise design should be reviewed by Engineer/Contractor ensuring that the NCO and EIAO-TM criteria at NSRs can be met in the future. FNMP should be prepared before the issue of tender and before commencement of the installation of fixed plant, subject to the contract arrangement of the Project and agreement with EPD. The FNMP should be certified by Certified Noise Modelling Professional of HKIQEP or equivalent. Fixed Noise Audit Report(s) (FNAR) should also be prepared before commencement of operation of the Project to demonstrate the compliance of the fixed plant noise sources of the Project.

4.9.4 The NOL alignment would be located underground except a short trough section at the tunnel portal connecting to NTD. The trough section has been minimised and would be covered with noise canopies. Considering the train speed and train frequency are relatively low at the trough section and there would be no direct line of sight from any NSRs to the airborne railway noise sources at the trough section and NTD, adverse airborne railway noise impact due to the operation of the Project is therefore not anticipated.

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^[1] Fixed Plant Noise Audit Report for South Island Line (East), November 2016 (https://www.epd.gov.hk/eia/register/english/permit/vep5082016/documents/fpnar/pdf/fpnar.pdf)

^[2] Environmental Review Report for supporting the Variation of Environmental Permit (VEP) of Sheung Shui to Lok Ma Chau Spur Line 2021 (Application No.: VEP-604/2021)