Figure 1.1	Locations of Key Construction Activities (after commissioning of 3RS)
Figure 2.1	Locations of Air and Noise Monitoring Stations and Chek Lap Kok Wind Station
Figure 2.2	Vessel based Dolphin Monitoring Transects in Construction, Post-Construction, and Operation Phases
Figure 2.3	Sightings Distribution of Chinese White Dolphins
Figure 2.4	Sighting Locations of Chinese White Dolphins with Different Group Sizes
Figure 2.5	Sighting Locations of Chinese White Dolphins Engaged in Different Behaviours
Figure 2.6	Sighting Locations of Mother-calf Pairs

Appendices

Appendix A	Project Organisation Chart
Appendix B	Environmental Mitigation Implementation Schedule (EMIS) for Construction Phase
Appendix C	Monitoring Results

Abbreviations

3RS	Three-Runway System
AAHK	Airport Authority Hong Kong
AECOM	AECOM Asia Company Limited
AFCD	Agriculture, Fisheries and Conservation Department
AIS	Automatic Information System
ANI	Encounter Rate of Number of Dolphins
APM	Automated People Mover
AW	Airport West
BHS	Baggage Handling System
C&D	Construction and Demolition
CAP	Contamination Assessment Plan
CAR	Contamination Assessment Report
CTCC	Construction Traffic Control Centre
CWD	Chinese White Dolphin
DCM	Deep Cement Mixing
DEZ	Dolphin Exclusion Zone
DO	Dissolved Oxygen
EIA	Environmental Impact Assessment
EM&A	Environmental Monitoring & Audit
EMIS	Environmental Mitigation Implementation Schedule
EP	Environmental Permit
EPD	Environmental Protection Department
EPSS	Emergency Power Supply Systems
ET	Environmental Team
FCZ	Fish Culture Zone
HDD	Horizontal Directional Drilling
HKBCF	Hong Kong-Zhuhai-Macao Bridge Hong Kong Boundary Crossing Facilities
HKIA	Hong Kong International Airport
HSF	High Speed Ferry
IEC	Independent Environmental Checker
I-2RS	Interim Two Runway System
LKC	Lung Kwu Chau
MMHK	Mott MacDonald Hong Kong Limited
MMWP	Marine Mammal Watching Plan
MSS	Maritime Surveillance System
MTRMP-CAV	Updated Marine Travel Routes and Management Plan for Construction and Associated Vessel
NEL	Northeast Lantau
NLMP	North Lantau Marine Park
NWL	Northwest Lantau
PAM	Passive Acoustic Monitoring
SC	Sha Chau
SCZ	Speed Control Zone
SCLKCMP	Sha Chau and Lung Kwu Chau Marine Park
SS	Suspended Solids
STG	Encounter Rate of Number of Dolphin Sightings
SWL	Southwest Lantau
T2	Terminal 2
The Manual	The Updated EM&A Manual
The Project	The Expansion of Hong Kong International Airport into a Three-Runway System
The SkyPier Plan	Marine Travel Routes and Management Plan for High Speed Ferries of SkyPier
TSP	Total Suspended Particulates
WL	West Lantau
WMP	Waste Management Plan

Executive Summary

The “Expansion of Hong Kong International Airport into a Three-Runway System” (the Project) serves to meet the future air traffic demands at Hong Kong International Airport (HKIA). On 7 November 2014, the Environmental Impact Assessment (EIA) Report (Register No.: AEIAR-185/2014) for the Project was approved and an Environmental Permit (EP) (Permit No.: EP-489/2014) was issued for the construction and operation of the Project.

This is the 37^th Construction Phase Quarterly EM&A Report for the Project which summarises the monitoring results and audit findings of the EM&A programme during the reporting period from 1 January 2025 to 31 March 2025.

The new North Runway was commissioned in November 2022. Following the completion of reconfiguration works on the Centre Runway, the Three-runway System (3RS) was commissioned on 28 November 2024.

Key Activities in the Reporting Period

The key activities of the Project carried out in the reporting period are located in reclamation areas and existing airport island respectively. Works in the reclamation areas included filling works, pavement works, concourse superstructure works, tunnel works for Automated People Mover (APM) and Baggage Handling System (BHS) and associated works. Meanwhile, works on the existing airport island involved Terminal 2 (T2) expansion works, modification and tunnel works for APM and BHS, utilities works, road and drainage works, excavation works and 132kV cable laying works.

EM&A Activities Conducted in the Reporting Period

The EM&A programme was undertaken in accordance with the Manual of the Project. Summary of the monitoring activities during this reporting period is presented as below:

Monitoring Activities	Number of Sessions
1-hour Total Suspended Particulates (TSP) air quality monitoring	90
Noise monitoring	50
Vessel line-transect surveys for operation phase Chinese White Dolphin (CWD) monitoring	6

Environmental auditing works, including weekly site inspections of construction works conducted by the ET and bi-weekly site inspections conducted by the Independent Environmental Checker (IEC), audit of SkyPier High Speed Ferries (HSF), and audit of construction and associated vessels, were conducted in the reporting period. Based on the information including ET’s observations, records of Maritime Surveillance System (MSS), and contractors’ site records, it is noted that environmental pollution control and mitigation measures were properly implemented and construction activities of the Project in the reporting period did not introduce adverse impacts to the sensitive receivers.

A 12-month operation phase CWD monitoring by vessel line transect survey was commenced in January 2025.

Snapshots of Good Environmental Practices in the Reporting Period


Wheel washing at site exit	Provision of environmental training for site personnel	Self-monitoring of effluent sample from wastewater treatment facility

Key examples of good site practices implemented in the Project are highlighted as below:

1. Provision of wheel washing for construction vehicles before leaving the site area.

2. Provision of environmental training for site personnel by the contractor.

3. Conducted self-monitoring of an effluent sample from the wastewater treatment facility by the contractor.

Summary Findings of the EM&A Programme

The monitoring works for construction dust, construction noise, construction waste and landscape & visual were conducted during the reporting period in accordance with the Manual.

Monitoring results of construction dust, construction noise, and construction waste did not trigger the corresponding Action and Limit Levels in the reporting period. No non-conformity was recorded for landscape & visual monitoring in the reporting period.

The key findings of the EM&A programme during the reporting period are summarised as below:

	Yes	No	Details	Analysis / Recommendation / Remedial Actions
Breach of Limit Level^		√	No breach of Limit Level was recorded.	Nil
Breach of Action Level^		√	No breach of Action Level was recorded.	Nil
Complaint received in this reporting period	√		A complaint regarding dust nuisance was received on 14 January 2025.	ET requested the relevant contractor to provide information regarding the complaint and replies indicated cleaning works were carried out inside the North Wing Level 6 of Terminal 2 Concourse. The relevant contractor improved their dust mitigation measures prior to undertaking further cleaning works at the area and conducted refresher training for frontline workers. During the ET’s site inspections, no dust related item was recorded. The relevant contractor was reminded to keep review and enhance relevant dust suppression measures to prevent dust nuisance. Hence, the case was considered closed.
Notification of any summons and status of prosecutions		√	No notification of summons nor prosecution was received.	Nil
Changes that affect the EM&A		√	There was no change to the construction works that may affect the EM&A.	Nil

Remarks:

^Only triggering of Action or Limit Level found related to Project works is counted as Breach of Action or Limit Level.

1 Introduction

1.1 Background

On 7 November 2014, the Environmental Impact Assessment (EIA) Report (Register No.: AEIAR-185/2014) for the “Expansion of Hong Kong International Airport into a Three-Runway System” (the Project) was approved and an Environmental Permit (EP) (Permit No.: EP-489/2014) was issued for the construction and operation of the Project.

Airport Authority Hong Kong (AAHK) commissioned Mott MacDonald Hong Kong Limited (MMHK) to undertake the role of Environmental Team (ET) for carrying out the Environmental Monitoring & Audit (EM&A) works during the construction phase of the Project in accordance with the Updated EM&A Manual (the Manual) submitted under EP Condition 3.1 [1]. AECOM Asia Company Limited (AECOM) was employed by AAHK as the Independent Environmental Checker (IEC) for the Project.

The Project covers the expansion of the existing airport into a three-runway system (3RS) with key project components comprising land formation of about 650 ha and all associated facilities and infrastructure including taxiways, aprons, aircraft stands, a passenger concourse, an expanded Terminal 2, all related airside and landside works and associated ancillary and supporting facilities. The submarine aviation fuel pipelines and submarine power cables also require diversion as part of the works.

Construction of the Project is to proceed in the general order of diversion of the submarine aviation fuel pipelines, diversion of the submarine power cables, land formation, and construction of infrastructure, followed by construction of superstructures.

The summary of construction works programme can be referred to the corresponding Monthly EM&A Reports. Description of relevant contracts in the reporting period was presented in Appendix A of the Construction Phase Monthly EM&A Report No. 94.

1.2 Scope of this Report

This is the 37^th Construction Phase Quarterly EM&A Report for the Project which summarises the key findings of the EM&A programme during the reporting period from 1 January 2025 to 31 March 2025.

1.3 Project Organisation

The Project’s organisation structure is provided in Appendix A. Contact details of the key personnel have been updated and provided in Table 1.1.

Table 1.1: Contact Information of Key Personnel

Party	Position	Name	Telephone
Project Manager’s Representative	Principal Manager, Environmental Compliance, Sustainability	Lawrence Tsui	2183 2734
(Airport Authority Hong Kong)	Environmental Team Leader	Terence Kong	2828 5919
	Deputy Environmental Team Leaders	Heidi Yu	2828 5704
	Deputy Environmental Team Leaders	Ken Wong	2828 5817
Independent Environmental Checker (IEC) (AECOM Asia Company Limited)	Independent Environmental Checker	Roy Man	3729 0380
	Deputy Independent Environmental Checker	Jackel Law	3856 5312

Reclamation Works:

Party

Position

Name

Telephone

Contract 3206

Main Reclamation Works (ZHEC-CCCC-CDC Joint Venture)

Project Manager

Alan Mong

3763 1352

Environmental Officer

Zhang Bin Wang

3763 1525

Airfield Works:

Party	Position	Name	Telephone
Contract 3305 Airfield Ground Lighting System (ADB Safegate Hong Kong Limited)	Project Manager	Allam Al-Turk	2944 9725
	Environmental Officer	Ivan Ting	9222 9490
Contract 3306 Observation Facility Control System Supporting Interim 2RS and 3RS (Chinney Alliance Engineering Limited)	Project Director	Dennis Yam	9551 9920
	Environmental Officer	Richard Liu	9216 8990
Contract 3308 Foreign Object Debris Detection System (DAS Aviation Services Group)	Project Manager	Jeffrey Yau	9873 7422
Contract 3310 North Runway Modification Works (China State Construction Engineering (Hong Kong) Ltd.)	Project Manager	Kingsley Chiang	9424 8437
	Environmental Officer	Federick Wong	9842 2703

Terminal 2 Concourse and Apron Works:

Party	Position	Name	Telephone
Contract 3402 New Integrated Airport Centres Enabling Works (Wing Hing Construction Co., Ltd.)	Project Manager	Wyman Lau	6112 9753
	Health Safety Environmental Manager	Mike Leung	6625 2550
Contract 3404 Integrated Airport Control System (Shun Hing Systems Integration Co., Ltd.)	Project Manager	Andy Ng	9102 2739
	Environmental Officer	Michael Lo	6228 3926
Contract 3405 Third Runway Concourse Foundation and Substructure Works (China Road and Bridge Corporation – Bachy Soletanche Group Limited – LT Sambo Co., Ltd. Joint Venture)	Project Manager	Francis Choi	9423 3469
	Environmental Officer	Jacky Lai	9028 8975
Contract 3408 Third Runway Concourse and Apron Works (Beijing Urban Construction Group Company Limited and Chevalier (Construction) Company Limited Joint Venture)	Senior HSE Manager	Qian Zhang	5377 7976
	Environmental Officer	Ivan Mak	9422 4805

Terminal 2 Expansion:

Party

Position

Name

Telephone

Contract 3508

Terminal 2 Expansion Works

(Gammon Engineering & Construction Company Limited)

Project Director

Richard Ellis

6201 5637

Environmental Officer

Carrie Kwan

9276 0551

Automated People Mover and Baggage Handling System:

Party	Position	Name	Telephone
New Automated People Mover System (TRC Line) (CRRC Puzhen Bombardier Transportation Systems Limited and CRRC Nanjing Puzhen Co., Ltd. Joint Venture)	Project Manager	Hongdan Wei	158 6180 9450
	Environmental Officer	H Y Yue	9185 8186
Contract 3602 Existing APM System Modification Works (Ndsiiigata Transys Co., Ltd.)	Project Manager	Xia Bo	6586 4950
	Environental Officer	Y M Tong	5316 9801
Contract 3603 3RS Baggage Handling System (VISH Consortium)	Project Manager	K C Ho	9272 9626
	Environmental Officer	Richard Ng	9802 9577

Airport Support Infrastructure:

Party	Position	Name	Telephone
Contract 3801 APM and BHS Tunnels on Existing Airport Island (China State Construction Engineering (Hong Kong) Ltd.)	Project Manager	Kingsley Chiang	9424 8437
	Environmental Officer	Eunice Kwok	9243 1331
Contract 3802 APM and BHS Tunnels and Related Works (Gammon Engineering & Construction Company Limited)	Project Director	John Adams	6111 6989
	Environmental Officer	Yan Ng	5345 8555
Contract 3804 East and Landside Fire Stations (Beijing Urban Construction Group Company Limited - Beijing Urban Construction International Company Limited - Kin Shing (Leung's) General Contractors Ltd Joint Venture)	Project Manager	Zhang Jinyuan	6708 0506
	Environmental Representative	Karis Lam	6084 9745
Contract 3805 New Airport District Police Operational Base (Chinney Construction Co., Ltd.)	Project Manager	Peter Li	9628 0768
	Environmental Officer	Mike Li	6306 8547

Construction Support:

Party	Position	Name	Telephone
Contract 3721 Construction Support Infrastructure Works (China State Construction Engineering (Hong Kong) Ltd.)	Senior Project Manager	Thomas Lui	9011 5340
	Environmental Officer	John Mak	6273 8703
Contract 3728 Minor Site Works (Shun Yuen Construction Company Limited)	Contract Manager	C K Liu	9194 8739
	Environmental Officer	Dan Leung	6856 5899
Contract 3733 Emergency Repair Service (Wing Hing Construction Co., Ltd.)	Project Manager	Michael Kan	9206 0550
	Safety Health Environmental Manager	Mike Leung	6625 2550
Contract 3901A Concrete Batching Facility (K. Wah Concrete Company Limited)	Project Manager	Benedict Wong	9553 2806
	Environmental Officer	C P Fung	9874 2872
Contract 3901B Concrete Batching Facility (Gammon Construction Limited)	General Manager	Gabriel Chan	2435 3260
	Environmental Officer	Rex Wong	2695 6319
Contract 3908 Quay Management Services (Gitanes – Crown Asia Joint Venture)	Project Manager	Ian Li	9750 6438
	Environmental Officer	Tang Kai Fun	9406 3526
Contract 3913 Asphalt Batching Plant (SPR Joint Venture)	Project Manager	Xie Yi Sheng	6580 6005
Contract 3913 Asphalt Batching Plant (SPR Joint Venture)	Environmental Officer	Kenneth Chan	9300 2182

Utilities:

Party

Position

Name

Telephone

132kV Cable

(CLP Power Hong Kong Limited / Kum Shing (K.F.) Construction Company Limited)

Engineer

Ken Fung

6391 9087

Assistant Engineer

Kevin Wu

6508 9779

1.4 Contact information for the Project

The contact information for the Project is provided in Table 1.2. The public can contact us through the following channels if they have any queries and comments on the environmental monitoring data and project related information.

Table 1.2: Contact Information of the Project

Channels	Contact Information
Hotline	3908 0354
Email	env@3rsproject.com
Fax	3747 6050
Postal Address	Airport Authority Hong Kong HKIA Tower 1 Sky Plaza Road Hong Kong International Airport Lantau Hong Kong Attn: Environmental Team Leader Mr Terence Kong c/o Mr Lawrence Tsui (TRD)

1.5 Summary of Construction Works

The new North Runway was commissioned in November 2022. Following the completion of reconfiguration works on the Centre Runway, the 3RS was commissioned on 28 November 2024.

1.6 Summary of EM&A Programme Requirements

The status for all environmental aspects is presented in Table 1.3. The EM&A requirements remained unchanged during the reporting period.

Table 1.3: Summary of Status for All Environmental Aspects under the Updated EM&A Manual

Parameters	EM&A Requirements	Status
Air Quality
Baseline Monitoring	At least 14 consecutive days before commencement of construction work	The baseline air quality monitoring result was reported in Baseline Monitoring Report and submitted to EPD under EP Condition 3.4.
Impact Monitoring	At least 3 times every 6 days	On-going
Noise
Baseline Monitoring	Daily for a period of at least two weeks prior to the commencement of construction works	The baseline noise monitoring result was reported in Baseline Monitoring Report and submitted to EPD under EP Condition 3.4.
Impact Monitoring	Weekly	On-going
Water Quality
General Baseline Water Quality Monitoring for reclamation, water jetting and field joint works	Three days per week, at mid-flood and mid-ebb tides, for at least four weeks prior to the commencement of marine works.	The baseline water quality monitoring result was reported in Baseline Water Quality Monitoring Report and submitted to EPD under EP Condition 3.4.
General Impact Water Quality Monitoring for reclamation, water jetting and field joint works	Three days per week, at mid-flood and mid-ebb tides.	General impact water quality monitoring for water jetting works was completed on 23 May 2017. The general impact water quality monitoring was terminated after 31 October 2023.
Initial Intensive Deep Cement Mixing (DCM) Water Quality Monitoring	At least four weeks	The Initial Intensive DCM Monitoring Report was submitted and approved by EPD in accordance with the Detailed Plan on DCM.
Regular DCM Water Quality Monitoring	Three times per week until completion of DCM works.	Due to the completion of all marine-based DCM works within April 2022, regular DCM monitoring was ceased at all monitoring stations starting from 28 April 2022.
Post-construction Phase Water Quality Monitoring	Three days per week, at mid-flood and mid-ebb tides for four weeks	The four-week post-construction phase water quality monitoring exercise was commenced on 14 November 2023 and completed on 9 December 2023.
Sewerage and Sewage Treatment
Methodology for carrying out annual sewage flow monitoring for concerned gravity sewer	Methodology to be prepared and submitted to EPD one year before the scheduled commencement of operation of the proposed third runway.	The proposed methodology of the annual sewage flow monitoring was approved by EPD. The annual flow monitoring was started from June 2021 and completed in 2022.
Details of the routine H₂S monitoring system for the sewerage system of 3RS	Details to be prepared and submitted to EPD at least one year before commencement of the operation of 3RS.	The H₂S monitoring was started after the commissioning of 3RS on 28 November 2024.
Waste Management
Waste Monitoring	At least weekly	On-going
Land Contamination
Supplementary Contamination Assessment Plan (CAP)	At least 3 months before commencement of any soil remediation works.	The Supplementary CAP was submitted and approved by EPD under EP condition 2.20.
Site Re-appraisal Summary Report for Fire Training Facility	Site Re-appraisal Summary Report for Fire Training Facility	Site Re-appraisal Summary Report for Fire Training Facility was submitted and accepted by EPD.
Contamination Assessment Report (CAR) for Golf Course	CAR to be submitted for golf course	The CAR for Golf Course was submitted and accepted by EPD.
CAR for Terminal 2 Emergency Power Supply System	CAR to be submitted for Terminal 2 Emergency Power Supply Systems	The CARs for Terminal 2 Emergency Power Supply Systems were submitted and accepted by EPD.
Terrestrial Ecology
Pre-construction Egretry Survey Plan	Once per month in the breeding season between April and July, prior to the commencement of Horizontal Directional Drilling (HDD) drilling works.	The Egretry Survey Plan was submitted and approved by EPD under EP Condition 2.14.
Ecological Monitoring	Monthly monitoring during the HDD construction works period from August to March.	The terrestrial ecological monitoring at Sheung Sha Chau was completed in January 2019.
Marine Ecology
Pre-Construction Phase Coral Dive Survey	Prior to marine construction works	The Coral Translocation Plan was submitted and approved by EPD under EP Condition 2.12.
Coral Translocation	-	The coral translocation was completed on 5 January 2017.
Post-translocation Monitoring	As per an enhanced monitoring programme based on the Coral Translocation Plan	The post-translocation monitoring programme according to the Coral Translocation Plan was completed in April 2018.
Chinese White Dolphins (CWD)
Baseline Monitoring	6 months of baseline surveys before the commencement of land formation related construction works. Vessel line transect surveys: Two full surveys per month; Land-based theodolite tracking surveys: Two days per month at the Sha Chau station and two days per month at the Lung Kwu Chau station; and Passive Acoustic Monitoring (PAM): For the whole duration of baseline period.	Baseline CWD results were reported in the CWD Baseline Monitoring Report and submitted to EPD in accordance with EP Condition 3.4.
Impact Monitoring	Vessel line transect surveys: Two full surveys per month; Land-based theodolite tracking surveys: One day per month at the Sha Chau station and one day per month at the Lung Kwu Chau station; and PAM: For the whole duration for land formation related construction works.	The construction phase CWD monitoring was completed in December 2023.
Post-construction Phase Monitoring	12 months of post-construction phase CWD monitoring upon the completion of marine construction works; and Vessel line transect surveys: Two full surveys per month.	The post-construction phase monitoring was completed in December 2024.
Operation Phase Monitoring	12 months of operation phase CWD monitoring upon full implementation of North Lantau Marine Park; and Vessel line transect surveys: Two full surveys per month.	The operation phase CWD monitoring was commenced in January 2025.
Operation Phase Audit	SkyPier High Speed Ferries (HSF) implementation measures: Once every three months for a period of one year upon operation of 3RS. Spill Response Plan implementation measures: Once every 6 months for a period of one year upon operation of 3RS.	The 1^st audit was conducted in February 2025. The 2^nd audit would be conducted in May 2025. The 1^st audit would be conducted in May 2025.
Landscape and Visual
Landscape and Visual Plan	At least 3 months before the commencement of construction works on the formed land of the Project.	The Landscape & Visual Plan was submitted and approved by EPD under EP Condition 2.18
Baseline Monitoring	One-off survey within the Project site boundary prior to commencement of any construction works	The baseline landscape & visual monitoring result was reported in Baseline Monitoring Report and submitted to EPD under EP Condition 3.4.
Impact Monitoring	Weekly	On-going
Establishment Works Monitoring	Bi-monthly	On-going
Long Term Management (10 years) Monitoring	Annually	On-going
Environmental Auditing
Regular site inspection	Weekly	On-going
Marine Mammal Watching Plan (MMWP) implementation measures	Monitor and check	No Marine Mammal Watching Plan (MMWP) implementation measures was conducted during this reporting period.
Dolphin Exclusion Zone (DEZ) Plan implementation measures	Monitor and check	No Dolphin Exclusion Zone (DEZ) monitoring was conducted during this reporting period.
SkyPier High Speed Ferries (HSF) implementation measures	Monitor and check	On-going
Construction and Associated Vessels implementation measures	Monitor and check	On-going
Silt Curtain Deployment Plan implementation measures	Monitor and check	No Silt Curtain Deployment Plan measure was implemented at C7a after 17 March 2025.
Spill Response Plan implementation measures	Monitor and check	On-going
Complaint Hotline and Email Channel	Construction phase	On-going
Environmental Log Book	Construction phase	On-going

Taking into account the construction works in the reporting period, impact monitoring of air quality, noise, waste management and landscape & visual were carried out in the reporting period.

The EM&A programme also involved weekly site inspections and related auditing conducted by ET for the checking of implementation of required environmental mitigation measures recommended in the approved EIA Report. To promote the environmental awareness and enhance the environmental performance of the contractors, regular environmental management meetings were conducted during the reporting period which are summarised as below:

· Thirty-seven environmental management meetings for EM&A review with works contracts.

The EM&A programme has been following the recommendations presented in the approved EIA Report and the Manual. A summary of implementation status of the environmental mitigation measures for the construction phase of the Project during the reporting period is provided in Appendix B.

2 Environmental Monitoring and Auditing

2.1 Air Quality Monitoring

Impact 1-hour Total Suspended Particulates (TSP) monitoring was conducted three times every six days at two representative monitoring stations during the reporting period. The locations of monitoring stations are described in Table 2.1 and presented in Figure 2.1.

2.1.1 Action and Limit Levels

The Action and Limit Levels of the air quality monitoring stipulated in the EM&A programme for triggering the relevant investigation and follow-up procedures under the programme are provided in Table 2.1 for reference.

Table 2.1: Impact Air Quality Monitoring Stations

Monitoring Station	Location	Action Level (mg/m³)	Limit Level (mg/m3)
AR1A	Man Tung Road Park	306	500
AR2	Village House at Tin Sum	298	500

2.1.2 Summary of Monitoring Results

The air quality monitoring results in the reporting period are summarised in Table 2.2 and the graphical plot is presented in Appendix C.

Table 2.2: Percentage of Air Quality Monitoring Results within Action and Limit Levels

	AR1A	AR2
Jan 2025	100%	100%
Feb 2025	100%	100%
Mar 2025	100%	100%
Overall	100%	100%

Note: The percentages are calculated by dividing the number of monitoring results within their corresponding Action and Limit Levels by the total number of monitoring results.

All monitoring results were within their corresponding Action and Limit Levels at all monitoring stations in the reporting period.

General meteorological conditions in the last month of the previous quarter and this reporting period were recorded and summarised in Table 2.3.

Table 2.3: General Meteorological Condition during Impact Air Quality Monitoring

	Weather	Dominant Wind Direction
Dec 2024	Sunny to Cloudy	Northwest to Southeast
Jan 2025	Sunny to Cloudy	Northeast to Northwest
Feb 2025	Sunny to Cloudy	North to Southwest
Mar 2025	Sunny to Cloudy	Southwest to Northwest

2.1.3 Conclusion

No dust emission source was observed at the monitoring stations during the monitoring sessions. As the sensitive receivers were far away from the construction activities, with the implementation of dust control measures, there was no adverse impact at the sensitive receivers attributable to the works of the Project.

2.2 Noise Monitoring

Impact noise monitoring was conducted at four representative monitoring stations once per week during 0700 and 1900 in the reporting period. The locations of monitoring stations are described in Table 2.4 and presented in Figure 2.1.

2.2.1 Action and Limit Levels

The Action and Limit Levels of the noise monitoring stipulated in the EM&A programme for triggering the relevant investigation and follow-up procedures under the programme are provided in Table 2.4 for reference.

Table 2.4: Impact Noise Monitoring Stations

Monitoring Station	Location	Action Level	Limit Level
NM1A	Man Tung Road Park	When one documented complaint is received from any one of the sensitive receivers	75 dB(A)
NM4	Ching Chung Hau Po Woon Primary School		65dB(A) / 70 dB(A) ⁽ⁱ⁾
NM5	Village House in Tin Sum		75 dB(A)
NM6	House No. 1, Sha Lo Wan		75 dB(A)

Note:

⁽ⁱ⁾ The Limit Level for NM4 is reduced to 70 dB(A) for being an educational institution. During school examination period, the Limit Level is further reduced to 65 dB(A).

2.2.2 Summary of Monitoring Results

The noise monitoring results in the reporting period are summarised in Table 2.5 and the graphical plot is presented in Appendix C.

Table 2.5: Percentage of Noise Monitoring Results within Action and Limit Levels

	NM1A	NM4	NM5	NM6
Jan 2025	100%	100%	100%	100%
Feb 2025	100%	100%	100%	100%
Mar 2025	100%	100%	100%	100%
Overall	100%	100%	100%	100%

Note: The percentages are calculated by dividing the number of monitoring results within their corresponding Action and Limit Levels by the total number of monitoring results.

No complaints were received from any sensitive receiver that triggered the Action Level.

General meteorological conditions in the last month of the previous quarter and this reporting period were recorded and summarised in Table 2.6.

Table 2.6: General Meteorological Condition during Impact Noise Monitoring

	Weather
Dec 2024	Sunny to Cloudy
Jan 2025	Sunny to Cloudy
Feb 2025	Sunny to Cloudy
Mar 2025	Sunny to Cloudy

2.2.3 Conclusion

Major sources of noise dominating the monitoring stations observed during the construction noise impact monitoring were traffic noise near NM1A, school activities near NM4, and aircraft noise near NM6. As the sensitive receivers were far away from the construction activities, with the implementation of noise control measures, there was no adverse impact at the sensitive receivers attributable to the works of the Project.

2.3 Water Quality Monitoring

All water impact monitoring and post-construction phase water quality monitoring have been completed, with results presented in the Annual EM&A Report for 2023. The analysis in the report indicates that the post-construction phase water quality monitoring did not reveal significant changes compared to the baseline levels. Therefore, it can be concluded that the marine works of the Project during construction phase did not cause deterioration in or adverse impacts on the marine water quality surrounding the Project site.

2.4 Waste Monitoring

In accordance with the Manual, waste generated from construction activities was audited once per week to determine if wastes were being managed in accordance with the Waste Management Plan (WMP) prepared for the Project, contract-specific WMP, and any statutory and contractual requirements. All aspects of waste management including waste generation, storage, transportation, and disposal were assessed during the audits.

2.4.1 Action and Limit Levels

The Action and Limit Levels of the construction waste are provided in Table 2.7.

Table 2.7: Action and Limit Levels for Construction Waste

Monitoring Stations	Action Level	Limit Level
Construction Area	When one valid documented complaint is received	Non-compliance of the WMP, contract-specific WMPs, any statutory and contractual requirements

2.4.2 Summary of Monitoring Results

Weekly monitoring of the Project construction works was carried out by the ET in the reporting period to check and monitor the implementation of proper waste management practices.

Recommendations made by the ET included provision and maintenance of proper chemical waste storage area, as well as handling, segregation, and regular disposal of general refuse. The contractors took actions to implement the recommended measures. Waste management audits were carried out by ET according to the requirements of the Waste Management Plan, updated EM&A Manual and the implementation schedule of the waste management mitigation measures in Appendix B.

Based on updated contractors’ information, summary of construction waste generated in the reporting period is presented in Table 2.8. The ET and IEC carried out site audits regularly and reviewed the trip ticket system.

The contractors established the recycling strategy for C&D materials with proper planning and design to maximize recycling and reuse. Dedicated recyclers were employed for different kinds of recyclable materials by the contractors. Dedicated areas for sorting of materials are established on site. Recyclable materials such as steel bar, metal strip, aluminium, paper and plastic are sorted on-site and transported off-site for recycling during this reporting period.

Table 2.8: Construction Waste Statistics

	C&D⁽¹⁾ Material Stockpiled for Reuse or Recycle (m³)	C&D Material Reused in the Project (m³)	C&D Material Reused in other Projects (m³)	C&D Material Transferred to Public Fill⁽²⁾(m³)	Chemical Waste (kg)	Chemical Waste (l)	General Refuse (tonne)
Previous reporting period
Oct 2024	293	14,738	0	7,395	0	2,400	5,959
Nov 2024	833	0	0	4,533	1,890	2,600	5,907
Dec 2024⁽³⁾	353	0	0	6,284	800	0	7,893
Total	1,479	14,738	0	18,212	2,690	5,000	19,759
This reporting period
Jan 2025	1,583	160	0	8,037	0	0	4,472
Feb 2025	8	11,494	0	7,826	350	0	2,959
Mar 2025 ⁽³⁾	0	1,334	0	6,218	300	0	4,520
Total	1,591	12,988	0	22,081	650	0	11,951

Notes:

(1) C&D refers to Construction and Demolition.

(2) C&D materials not suitable for reuse on-site, including asphalt waste and sediment slurry, were transferred to public fill during the reporting period.

(3) Updated figures were provided by contractors.

There was no complaint, non-compliance of the WMP, contract-specific WMPs, statutory and contractual requirements that triggered Action and Limit Levels in this reporting period.

2.4.3 Marine Sediment Management

Marine sediment is managed according to the EIA Report, Updated EM&A Manual and Waste Management Plan and the proposal of Further Development on Treatment Level / Details and the Reuse Mode for Marine Sediment (hereinafter referred to as “Further Development Proposal”) of the Project. The storage conditions of the excavated marine sediment, treatment process, final backfilling location as well as associated records were inspected and checked by ET and verified by IEC to ensure they were in compliance with the requirements as stipulated in the Waste Management Plan and Further Development Proposal.

Backfilling works for treated marine sediment generated from the reclaimed land area were conducted during the reporting period. The details of the marine sediment sampling, treatment and backfilling can be referred to Annual EM&A Report No.8.

2.5 Chinese White Dolphin Monitoring

The operation phase CWD monitoring was conducted by vessel line transect survey at a frequency of two full surveys per month since January 2025. The vessel survey transects followed the transect lines proposed in the Manual and are consistent with those used in the Agriculture, Fisheries and Conservation Department (AFCD) long-term CWD monitoring programme. The transect locations of CWD monitoring by vessel line transect survey are shown in Figure 2.2.

2.5.1 Summary of Monitoring Results

2.5.1.1 Vessel Line Transect Survey

Survey Effort

During the reporting period from January to March 2025, a total of six sets of vessel line transect survey covering all transects in Northeast Lantau (NEL), Northwest Lantau (NWL), Airport West (AW), West Lantau (WL) and Southwest Lantau (SWL) survey areas were conducted at a frequency of twice per month, in each survey area.

A total of around 1,331 km of survey effort was collected from these surveys, with around 96.6% of the total survey effort being conducted under favourable weather condition (i.e. Beaufort Sea State 3 or below with favourable visibility). Details of the survey effort data are presented in Appendix C.

CWD Sighting

From January to March 2025, there were a total of 53 sightings of CWD, with 110 dolphins sighted (Table 2.9). All these sightings were recorded during on-effort searches under favourable weather condition.

When breaking down the sightings by survey areas, 37 sightings with a total of 83 dolphins and eight sightings with a total of 10 dolphins were recorded in WL and SWL respectively during the current reporting period. Six sightings of 13 dolphins were recorded in NWL while two sighting of four dolphins were recorded in the Airport West water within the NWL survey area. No CWD was sighted in NEL survey area.

Compared with the previous quarter (i.e. October to December 2024), the total number of CWD sightings and the total number of the dolphins have increased by 130% and 96% respectively. There was a notable increase in both dolphin sightings and the number of dolphins in both WL and NWL survey area in the current reporting quarter.

Compared with the same quarter of last year (i.e., January to March 2024), there was also an increase in both the total number of sightings and the total number of dolphins by 152% and 47% respectively. In WL, there was an increase in both the number of sightings and number of dolphins by 105% and 22% respectively. In SWL, there was a slight increase in both number of sightings and number of dolphins. Moreover, there were significant increases in both total number of sightings and total number of dolphins in NWL as there was no sighting in the same reporting period in 2024.

Table 2.9 below shows the comparison of the numbers of sightings and dolphins amongst the current reporting period, last quarter, and the same quarter of last year.

Table 2.9: Summary of Number of CWD Sightings and Number of Dolphins for the Same Quarter Last Year, Previous Quarter, and Current Reporting Period

	Same Quarter of Last Year January to March 2024	Previous Reporting Period October to December 2024	Current Reporting Period January to March 2025
NEL	0 (0)	0 (0)	0 (0)
NWL	0 (0)	2 (3)	6 (13)
AW	1 (1)	0 (0)	2 (4)
WL	18 (68)	11 (23)	37 (83)
SWL	2 (6)	10 (30)	8 (10)
Total	21 (75)	23 (56)	53 (110)

Note: Values in ( ) represent number of dolphins

The distribution of CWD sightings recorded from January to March 2025 is illustrated in Figure 2.3. In NWL, most of the CWD sightings were clustered at the western water of HKIA while another two sightings were recorded in the western water of Sha Chau and the northern water outside of SCLKCMP respectively. In WL, CWD sightings were scattered throughout the waters between Tai O and Fan Lau. In SWL, the CWD sightings were recorded in water near Fan Lau and Tai Long Wan as well as at the northern water of Soko’s Island. No CWD sighting was recorded in NEL survey area during the reporting period. Details of the sighting data are presented in Appendix C.

Figure 2.3: Sightings Distribution of Chinese White Dolphins from January to March 2025

Remarks: (1) Please note that there are 53 pink circles on the map indicating the sighting locations of CWD. Some of them were very close to each other and therefore appear overlapped on this sighting distribution map. (2) Marine Park excludes land area and the landward boundary generally follows the high water mark along the coastline.

Group Size

From January to March 2025, the group size of CWD sightings ranged from one to eight dolphins. The average group size of CWD was 2.08 dolphins per group, which is smaller than that of the last quarter (2.43 dolphins per group). The average group size of CWD in this reporting quarter is also smaller than that of the same quarter of last year (3.57 dolphins per group).

In this reporting quarter, majority of the CWD sightings were in small group size (i.e., 1-2 dolphins). There was no CWD sighting with large group size (i.e., 10 or more dolphins) during this reporting period.

There was no apparent pattern in the distribution of small-sized dolphin groups, medium-sized dolphin groups and large-sized dolphin groups in all survey areas. Sighting locations of CWD groups with different group sizes are depicted in Figure 2.4.

Figure 2.4: Sighting Locations of Chinese White Dolphins with Different Group Sizes

Remarks: (1) Please note that there are 53 circles on the map indicating the sighting locations of CWD. Some of them were very close to each other and therefore appear overlapped on this sighting distribution map. (2) Marine park excludes land area and the landward boundary generally follows the high water mark along the coastline.

Activities and Association with Fishing Boats

From January to March 2025, 12 sightings of CWD were recorded with foraging activities. Amongst them, three sightings were observed associated with operating gillnetter and one sighting with operating purse seiner in WL.

Sightings with foraging activities recorded in the current reporting period was higher than that in the previous reporting period (i.e., six sightings involved foraging activities between October and December 2024). The number of CWD sightings with foraging activities in this reporting period was also higher than that in the same quarter of last year (i.e., six sightings between January to March 2024).

The sighting locations of CWDs engaged in different behaviours during the current reporting period are illustrated in Figure 2.5.

Figure 2.5: Sighting Locations of Chinese White Dolphins Engaged in Different Behaviours

Remarks: (1) Marine park excludes land area and the landward boundary generally follows the high water mark along the coastline.

Mother-calf Pairs

From January to March 2025, four sightings of CWD were recorded with the presence of mother-and-unspotted juvenile pairs and/or mother-and-calf pair, which was more than that recorded in the previous reporting quarter (i.e., two sightings between October to December 2024). Yet, the number of CWD sightings with the presence of mother-calf pairs was less than that recorded in the same quarter of last year (i.e., seven sightings between January to March 2024).

These four sightings with the presence of mother-calf pairs recording during the reporting period were recorded in WL and SWL survey area. The locations of CWD sightings with the presence of mother-calf pairs are shown in Figure 2.6.

Figure 2.6: Sighting Locations of Mother-calf Pairs

Remarks: (1) Please note that there are four circles on the map indicating the sighting locations of CWD. Some of them were very close to each other and therefore appear overlapped on this sighting distribution map.

(2) Marine park excludes land area and the landward boundary generally follows the high water mark along the coastline.

Photo Identification

Between January and March 2025, a total number of 36 different CWD individuals were identified altogether for a total of 61 times. Re-sighting information of CWD individuals provides an initial idea of their range use and apparent connection between different areas of Lantau waters. Amongst these 36 different CWD individuals, 13 animals (i.e., NLMM023, SLMM003, SLMM007, SLMM014, SLMM023, SLMM031, SLMM073, WLMM043, WLMM056, WLMM079, WLMM080, WLMM114 and WLMM147) were sighted for more than once. The most frequently re-sighted individual of this quarter is WLMM056 which has been re-sighted 5 times followed by SLMM003 and SLMM023 both being re-sighted for 4 times.

Four individuals namely SLMM014, WLMM056, WLMM079 and WLMM114 were re-sighted in different survey areas during this reporting period. The numbers of CWD individuals re-sighted more than once was higher than that of the last report reporting period from October to December 2024 and the number of identified individuals showed cross-area movement is showing the same trend (i.e. Four CWD individuals in current reporting period versus only one in last reporting period).

A summary of photo identification works is presented in Table 2.10. Representative photos of the 36 identified individuals and figures depicting the sighting locations of the aforementioned four individuals re-sighted in different survey areas in this reporting period are presented in Appendix C.

Table 2.10: Summary of Photo Identification

Individual ID	Date of sighting	Sighting Group No.	Area	Individual ID	Date of sighting	Sighting Group No.	Area
NLMM013	20-Jan-25	1	AW	WLMM001	20-Mar-25	5	WL
NLMM023	19-Feb-25	3	NWL	WLMM004	18-Feb-25	6	WL
NLMM023	19-Mar-25	1	NWL	WLMM007	20-Jan-25	6	WL
NLMM027	19-Feb-25	3	NWL	WLMM029	21-Mar-25	4	WL
NLMM055	20-Mar-25	5	WL	WLMM043	20-Jan-25	1	AW
NLMM063	19-Feb-25	3	NWL		19-Feb-25	1	NWL
NLMM065	19-Feb-25	3	NWL		19-Feb-25	2	NWL
NLMM094	19-Mar-25	1	NWL	WLMM049	20-Mar-25	5	WL
SLMM003	20-Mar-25	4	WL	WLMM056	17-Jan-25	5	SWL
		5	WL		20-Jan-25	9	WL
		7	WL		12-Mar-25	10	SWL
	21-Mar-25	5	WL		21-Mar-25	1	WL
SLMM007	20-Mar-25	1	WL		21-Mar-25	3	WL
	20-Mar-25	2	WL	WLMM063	20-Jan-25	2	WL
	21-Mar-25	2	WL	WLMM079	3-Jan-25	1	SWL
SLMM014	12-Feb-25	8	SWL		20-Mar-25	1	WL
SLMM014	20-Mar-25	5	WL		21-Mar-25	5	WL
SLMM023	18-Feb-25	3	WL	WLMM080	18-Feb-25	5	WL
	20-Mar-25	5	WL	WLMM080	20-Mar-25	6	WL
	21-Mar-25	1	WL	WLMM114	20-Jan-25	9	WL
	21-Mar-25	5	WL	WLMM114	3-Mar-25	11	SWL
SLMM030	5-Feb-25	1	NWL	WLMM118	18-Feb-25	5	WL
SLMM031	20-Mar-25	7	WL	WLMM147	20-Mar-25	1	WL
	20-Mar-25	8	WL	WLMM147	21-Mar-25	5	WL
	21-Mar-25	4	WL	WLMM180	20-Jan-25	5	WL
SLMM035	21-Mar-25	4	WL	WLMM204	11-Feb-25	1	WL
SLMM052	20-Mar-25	5	WL	WLMM205	11-Feb-25	1	WL
SLMM071	5-Feb-25	1	NWL	WLMM206	11-Feb-25	2	WL
SLMM073	20-Mar-25	1	WL	WLMM207	11-Feb-25	2	WL
	20-Mar-25	2	WL	WLMM208	11-Feb-25	2	WL
	21-Mar-25	2	WL

2.5.1.2 Site Audit for CWD-related Mitigation Measures

During the reporting period, no dolphin observation station was deployed by the contractor for continuous monitoring of the DEZ in accordance with the DEZ Plan. During this reporting period, no training session were provided by the ET for the proposed dolphin observers.

The construction vessel management are presented in Section 2.8 below.

According to Section 10.6.2.2 of the Updated EM&A Manual, audits of HSF implementation measures and Spill Responses Plan implementation measures will be conducted once every three months and every six months respectively for one year upon operation of 3RS. The first audit of HSF implementation measures was conducted in February 2025. During the audit period from 28 November 2024 to 28 February 2025, all the HSFs complied with the HSF Plan. The second audit of HSF implementation measures will be conducted in May 2025. The first audit of the Spill Responses Plan measures will be conducted in May 2025.

2.6 Environmental Site Inspection

Site inspections of the construction works to audit the implementation of proper environmental pollution control and mitigation measures for the Project were conducted by ET and IEC on a weekly and bi-weekly basis, respectively. Besides, ad-hoc site inspections were also conducted by ET and IEC if environmental problems were identified, or subsequent to receipt of an environmental complaint, or as part of the investigation work. These site inspections provided a direct means to reinforce the specified environmental protection requirements and pollution control measures in construction sites.

During site inspections, environmental situation, status of implementation of pollution control and mitigation measures were observed. Environmental documents and site records, including waste disposal record, maintenance record of environmental equipment, and relevant environmental permit and licences, were also checked on-site. Observations were recorded in the site inspection checklist and passed to the contractor together with the appropriate recommended mitigation measures where necessary in order to advise contractors on environmental improvement, awareness and on-site enhancement measures. The observations were made with reference to the following information during the site inspections:

· The EIA and EM&A requirements;

· Relevant environmental protection laws, guidelines, and practice notes;

· The EP conditions and other submissions under the EP;

· Monitoring results of EM&A programme;

· Works progress and programme;

· Proposal of individual works;

· Contract specifications on environmental protection; and

· Previous site inspection results.

Good site practices were implemented in the project to enhance environmental performance. Key examples implemented in the Project are highlighted as below:

1. Provision of wheel washing for construction vehicles before leaving the site area.

2. Provision of environmental training for site personnel by the contractor.

3. Conducted self-monitoring of an effluent sample from the wastewater treatment facility by the contractor.


Wheel washing at site exit	Provision of environmental training for site personnel	Self-monitoring of effluent sample from wastewater treatment facility

Besides, advice was given when necessary to ensure the construction workforce were familiar with relevant procedures, and to maintain good environmental performance on site. Regular toolbox talks on environmental issues were organised for the construction workforce by the contractors to ensure understanding and proper implementation of environmental protection and pollution control mitigation measures.

A summary of implementation status of the environmental mitigation measures for the construction phase of the Project during the reporting period is provided in Appendix B.

2.6.1 Landscape and Visual Mitigation Measures

Implementation of applicable landscape and visual mitigation measures (reference to the environmental protection measures CM1 – CM10 and OM7 in Appendix B) was monitored regularly in accordance with the Manual. The implementation status of the environmental protection measures is summarised in Table 2.11. For trees which were managed under the Project during the reporting period, relevant measures (i.e., CM1 – CM9) were implemented by Contract 3508 and 132kV cable. For CM10, the advanced hydroseeding works around taxiways and runways were carried out during the reporting period. The total number of retained trees, transplanted trees and to-be-transplanted trees under the management of Project are summarized in Table 2.12.

The total number of retained trees of the Project as of March 2025 was 76. Compared to 24 retained trees reported in the previous reporting period, the change in number was due to the following reason:

· The works of 132kV cable commenced the maintenance of 52 retained trees.

The cumulative total number of transplanted trees of the Project remained unchanged (i.e. 26 nos.) comparing with previous reporting quarter. Details of the summary of transplanted trees are shown in Table 2.13. Photos of the transplanted trees are presented in Table 2.14.

For OM7, the bi-monthly site inspections for 12-month establishment period was undertaken in March 2025 during the reporting period.

Table 2.11: Landscape and Visual – Construction Phase Audit Summary

Landscape and Visual Mitigation Measures during Construction Implementation Status	Implementation Status	Relevant Contract(s) in the Reporting Period
CM1 – The construction area and contractor’s temporary works areas shall be minimised to avoid impacts on adjacent landscape.	The implementation of mitigation measures were checked by ET during weekly site inspection and clarified by the Contractors during the monthly Environmental Management Meetings. Implementation of the measures CM5, CM6 and CM7 by Contractors was observed.	All works contracts
CM2 – Reduction of construction period to practical minimum.
CM3 – Phasing of the construction stage to reduce visual impacts during the construction phase.
CM4 – Construction traffic (land and sea) including construction plants, construction vessels and barges shall be kept to a practical minimum.
CM5 – Erection of decorative mesh screens or construction hoardings around works areas in visually unobtrusive colours.
CM6 – Avoidance of excessive height and bulk of site buildings and structures
CM7 – Control of night-time lighting by hooding all lights and through minimisation of night working periods
CM8 – All existing trees shall be carefully protected during construction. Detailed Tree Protection Specification shall be provided in the Contract Specification. Under this specification, the Contractor shall be required to submit, for approval, a detailed working method statement for the protection of trees prior to undertaking any works adjacent to all retained trees, including trees in contractor’s works areas	Tree Protection Specifications were provided in the relevant Contract Specifications respectively for implementation by the Contractors under the Project. The Contractors’ performance on the implementation of the trees maintenance and protection measures were observed and checked by the ET weekly during construction period.	3508, 132kV Cable
CM9 – Trees unavoidably affected by the works shall be transplanted where practical. A detailed Tree Transplanting Specification shall be provided in the Contract Specification, if applicable. Sufficient time for necessary tree root and crown preparation periods shall be allowed in the project programme	Tree Transplanting Specifications were provided in the relevant Contract Specifications respectively for implementation by the Contractors under the Project where trees will unavoidably be affected by the construction works. The Contractors were required to submit Method Statements for tree transplanting prior to the transplanting works. Tree inspections were conducted by ET to check the tree transplanting works implemented by the Contractors on site. The Contractors’ performance on the implementation of trees maintenance and protection measures on transplanted trees were observed and checked by the ET bi-monthly during the 12-month establishment period after the completion of each batch of transplanting works. Long term management of the transplanted trees were currently monitored by ET annually.	3508
CM 10 – Land formation works shall be followed with advanced hydroseeding around taxiways and runways as soon as practical	The Contractor’s performance on the implementation of advanced hydroseeding works was observed and checked by the ET during the weekly site inspection.	3310
OM7 – Compensatory tree planting for all felled trees shall be provided to the satisfaction of relevant Government departments. Required numbers and locations of compensatory trees shall be determined and agreed separately with Government during the Tree Felling Application process under the relevant technical circulars⁽¹⁾	Compensatory trees have been planted in batches at different time periods. The compensatory trees were checked by ET bi-monthly during the 12-month establishment period after the completion of each batch of compensatory tree planting works. Subsequently, the trees were monitored annually throughout the 10-year long-term management period, succeeding the establishment period for each batch of compensatory planting.	AAHK

Note:

(1) AAHK is the management and maintenance agency of the compensatory trees. Tree Felling Application is not required for 3RS project.

Table 2.12: Summary of the Number of Retained, Transplanted and To-be-transplanted Trees in the Reporting Period

Contract No. / Works	Retained (nos.)	Transplanted (nos.)		To-be-transplanted (nos.)
Contract No. / Works	Retained (nos.)	Establishment Period	Maintenance Period	To-be-transplanted (nos.)
3503⁽¹⁾	0	0	9	0
3508	24	0	12	0
3801⁽²⁾	0	0	5	0
132kV Cable	52	0	0	0
Grand Total	76	0	26	0

Notes:

(1) Contract 3503 was completed and the 9 transplanted trees, including T835, T836, T838, T812, T814, T815, T829, T830 and T831, have been handed over to AAHK in February 2022.

(2) The 5 transplanted trees, including CT276, CT1253, CT1194, CT1794 and CT1795, have been handed over to other management agencies. Details of the management agency are presented in Table 2.13.

Table 2.13: Summary of the Transplanted Trees Updated in the Reporting Period

Tree ID	Transplant Date	Management Stage	Management Agency	Remarks
CT276	3 May 2018	Long Term Management period Jun 2019 – May 2028	Southern Landside Petrol Filling Station	Establishment Period was completed. Next inspection will be conducted in February 2026. Photos of the last inspection in February 2025 can be referred to Table 7.7 of the Construction Phase Monthly EM&A Report No. 110.
CT1253	4 May 2018	Long Term Management period Jun 2019 – May 2028	Southern Landside Petrol Filling Station
T835	22 Jan 2020	Long Term Management period Feb 2021 – Jan 2030	AAHK	Establishment Period was completed. The trees within the land parcel was acquired for construction of infrastructure. The trees were felled in 2023.
T836	13 Dec 2019	Long Term Management period Feb 2021 – Jan 2030	AAHK
T838	22 Jan 2020	Long Term Management period Feb 2021 – Jan 2030	AAHK
T812	21 Dec 2020	Long Term Management period Jan 2022 – Dec 2031	AAHK	Establishment Period was completed. Next inspection will be conducted in December 2025. Photos of the last inspection in December 2024 can be referred to Table 7.7 of the Construction Phase Monthly EM&A Report No. 108.
T814	20 Dec 2020	Long Term Management period Jan 2022 – Dec 2031	AAHK
T815	15 Dec 2020	Long Term Management period Jan 2022 – Dec 2031	AAHK
T829	18 Dec 2020	Long Term Management period Jan 2022 – Dec 2031	AAHK
T830	14 Dec 2020	Long Term Management period Jan 2022 – Dec 2031	AAHK
T831	19 Dec 2020	Long Term Management period Jan 2022 – Dec 2031	AAHK
T1493	6 Jul 2021	Long Term Management period Aug 2022 – Jul 2031	Contract 3508	Establishment Period was completed. Next inspection will be conducted in July 2025. Photos of the last inspection in July 2024 can be referred to Table 7.7 of the Construction Phase Monthly EM&A Report No.103.
T1494	6 Jul 2021	Long Term Management period Aug 2022 – Jul 2031	Contract 3508
T1495	10 Jul 2021	Long Term Management period Aug 2022 – Jul 2031	Contract 3508
T1496	5 Jul 2021	Long Term Management period Aug 2022 – Jul 2031	Contract 3508
T1497	5 Jul 2021	Long Term Management period Aug 2022 – Jul 2031	Contract 3508
T1498	29 Jun 2021	Long Term Management period Aug 2022 – Jul 2031	Contract 3508
T1499	29 Jun 2021	Long Term Management period Aug 2022 – Jul 2031	Contract 3508
T1500	30 Jun 2021	Long Term Management period Aug 2022 – Jul 2031	Contract 3508
T1501	30 Jun 2021	Long Term Management period Aug 2022 – Jul 2031	Contract 3508
T1502	5 Jul 2021	Long Term Management period Aug 2022 – Jul 2031	Contract 3508
T1503	6 Jul 2021	Long Term Management period Aug 2022 – Jul 2031	Contract 3508
T1504	24 Jun 2021	Long Term Management period Aug 2022 – Jul 2031	Contract 3508
CT1194	4 May 2018	Long Term Management period Jun 2019 – May 2028	Southern Landside Petrol Filling Station	Establishment Period was completed. Uprooted and collapsed due to Typhoon Higos on 18 August 2020. Tree removal was conducted as recommended by tree specialist of the contractor of Southern Landside Petrol Filing Station.
CT1794	3 May 2018	Long Term Management period Jun 2019 – May 2028	AsiaWorld-Expo	Establishment Period was completed. The tree within the land parcel was acquired by the government for construction of emergency hospital to handle COVID19 pandemic at AsiaWorld-Expo. The tree was felled in late 2020.
CT1795	3 May 2018	Long Term Management period Jun 2019 – May 2028	AsiaWorld-Expo	Establishment Period was completed. The tree within the land parcel was acquired by the government for construction of emergency hospital to handle COVID19 pandemic at AsiaWorld-Expo. The tree was felled in late 2020.

Table 2.14: Photos of the Existing Transplanted Trees Inspected in the Reporting Period


CT276	CT1253

2.6.2 Land Contamination Assessment

The Supplementary CAP was submitted to EPD pursuant to EP Condition 2.20. The CARs for Golf Course and T2 Emergency Power Supply Systems (EPSS) were submitted to EPD in accordance with EP Condition 1.9 and the Supplementary CAP, in which no land contamination issues were identified. EPD has issued no further comment for aforesaid CARs. No leakage was found after the removal of underground fuel pipelines and all required additional photos were submitted to EPD.

According to the approved supplementary CAP, there are 3 remaining locations where site re-appraisal / additional site investigation is proposed. The site re-appraisal summary report for Fire Training Facility was submitted and accepted by EPD on 20 December 2023. The status of site re-appraisal/ additional site investigation of the 2 remaining locations (Fuel Tank Room to the west of CAD Antenna Farm and Airside Petrol Filling Station) shall be further updated upon latest development programme is available.

2.7 Audit of SkyPier High Speed Ferries

The Marine Travel Routes and Management Plan for High Speed Ferries of SkyPier (the SkyPier Plan) was submitted to the Advisory Council on the Environment for comment and subsequently submitted to and approved by EPD in November 2015 under EP Condition 2.10. The approved SkyPier Plan is available on the dedicated website of the Project. In the SkyPier Plan, AAHK has committed to implement the mitigation measure of requiring HSFs of SkyPier travelling between HKIA and Zhuhai / Macau to start diverting the route with associated speed control across the area, i.e. Speed Control Zone (SCZ), with high CWD abundance. The route diversion and speed restriction at the SCZ have been implemented since 28 December 2015.

According to EP Condition 2.10 and the SkyPier Plan, the annual daily average limit and the maximum daily movement cap were to be implemented before the NLMP designation on 1 November 2024. Consequently, the limit and cap are no longer applicable.

During January 2025, no ferry movement between HKIA SkyPier and Zhuhai was recorded and a total 6 ferry movements between HKIA SkyPier and Macau were audited. The average speed of the HSF travelling through the Speed Control Zone (SCZ) ranged from 11.6 to 13.5 knots. All HSFs travelled through the SCZ with average speed within 15 knots in compliance with the SkyPier Plan.

No ferry movement between HKIA SkyPier and Zhuhai / Macau was recorded in February and March 2025.

During the previous reporting period, two ferries were recorded with the speed deviation within the NLMP in December 2024. These two cases were closed after the ET’s investigation.

The summary of the SkyPier Plan monitoring result is presented in Graph 1.

Graph 1: Summary of SkyPier High Speed Ferries Monitoring Results

2.8 Audit of Construction and Associated Vessels

On the implementation of the updated Marine Travel Routes and Management Plan for Construction and Associated Vessels (MTRMP-CAV), the requirements of the NLMP have been included in the Maritime Surveillance System (MSS). The MSS automatically recorded deviation cases such as speeding, and entering no entry zone. ET conducted bi-weekly audit of relevant information including AIS data, vessel tracks and other relevant records to ensure sufficient information were provided by the system and the contractors complied with the requirements of the MTRMP-CAV. The contactors submitted 3-month rolling vessel plans for construction vessel activities to AAHK in order to help maintain the number of construction vessels to a practicable minimum. The IEC also performed audit on the compliance of the requirements as part of the EM&A programme.

During the reporting period, deviations including speeding and entering no-entry zones were identified. After investigation by the contractors’ Construction Traffic Control Centre (CTCC) representatives, all the concerned captains were reminded to comply with the requirements of the MTRMP-CAV.

One skipper training workshop was held with one skipper by ET. One skipper training workshop was held by contractor’s Environmental Officer with one skipper and competency test was conducted subsequently with the trained skipper by ET.

2.9 Review of the Key Assumptions Adopted in the EIA Report

With reference to Appendix E of the Manual, it is noted that the key assumptions adopted in approved EIA report for the construction phase are still valid and no major changes are involved. The environmental mitigation measures recommended in the approved EIA Report remain applicable and shall be implemented in undertaking construction works for the Project.

3 Report on Non-compliance, Complaints, Notifications of Summons and Prosecutions

3.1 Compliance with Other Statutory Environmental Requirements

During the reporting period, environmental related licenses and permits required for the construction activities were checked. No non-compliance with environmental statutory requirements was recorded.

3.2 Analysis and Interpretation of Complaints, Notification of Summons and Status of Prosecutions

3.2.1 Complaints

During the reporting period, one environmental complaint was received and the details are summarized in Table 3.1 below.

Table 3.1: Summary of Environmental Complaints

Date of Complaint Received	Details	Analysis/ Remedial Actions	Status
14 January 2025	A complaint regarding dust nuisance was received.	A complaint regarding dust nuisance was received on 14 January 2025. The case was investigated by ET in accordance with the Manual and the Complaint Management Plan of the Project. ET requested the relevant contractor to provide information regarding the complaint and replies indicated cleaning works were carried out inside the North Wing Level 6 of Terminal 2 Concourse. The relevant contractor improved their dust mitigation measures by wetting the floor and using a mist sprayer prior to undertaking the cleaning works; and conducting refresher training with frontline cleaning workers on dust suppression measures for cleaning works. During the ET’s site inspections, no dust related item was recorded. The relevant contractor was reminded to keep review their dust mitigation measures and to enhance dust suppression measures before conducting cleaning and other dusty works to prevent dust nuisance. Hence, the case was considered closed.	Closed

3.2.2 Notifications of Summons or Status of Prosecution

Neither notification of summons nor prosecution was received during the reporting period.

3.3 Cumulative Statistics

Cumulative statistics on valid exceedance, non-compliance, complaints, notifications of summons and status of prosecutions are summarised in Table 3.2 and Table 3.3.

Table 3.2: Statistics for Valid Exceedances for the Environmental Monitoring

		Total No. Recorded in the Reporting Period	Total No. Recorded since the Project Commenced
1-hr TSP	Action Level	0	0
1-hr TSP	Limit Level	0	0
Noise	Action Level	0	0
Noise	Limit Level	0	0
Waste	Action Level	0	1
Waste	Limit Level	0	0
Water	Action Level	Nil⁽²⁾	0
Water	Limit Level	Nil⁽²⁾	0
CWD	Action Level	Nil⁽³⁾	0
CWD	Limit Level	Nil⁽³⁾	0

Remarks: 1) Non-project related triggers of Action or Limit Level are not shown in this table.

2) With the completion of land formation works including seawall construction and all marine filling works in the first quarter of 2023, the construction phase water quality impact monitoring was terminated after 31 October 2023. No water quality impact monitoring was undertaken during the reporting period.

3) Construction phase CWD monitoring by small vessel line-transect survey supplemented by land-based theodolite tracking survey and passive acoustic monitoring was completed in December 2023. No CWD impact monitoring was undertaken during the reporting period.

Table 3.3: Statistics for Non-compliance, Complaints, Notifications of Summons and Prosecution

Reporting Period	Cumulative Statistics
	Non-compliance	Complaints	Notifications of Summons	Prosecutions
This reporting period	0	1	0	0
From 28 December 2015 to end of the reporting period	0	81	2	2

4 Conclusion and Recommendation

The new North Runway was commissioned in November 2022. Following the completion of reconfiguration works on the Centre Runway, the 3RS was commissioned on 28 November 2024. In the first quarter of 2025, the EM&A programme has been implemented as planned, including construction air quality, construction noise, operation phase CWD monitoring, and waste monitoring, as well as environmental site inspections.

Key project activities included filling, pavement, concourse superstructure, and tunnel works for AMP and BHS in reclamation areas, and T2 expansion, utilities, road and drainage works excavation, and 132kV cable laying on the existing airport island.

During the reporting period, monitoring results showed no exceedances in construction dust, construction noise, and construction waste and no non-conformity in landscape & visual monitoring. All water impact monitoring and post-construction phase water quality monitoring have been completed. Operation phase CWD monitoring recorded 53 sightings of 110 dolphins under favorable conditions.

Site inspections were conducted regularly to ensure implementation of appropriate environmental pollution control and mitigation measures. Site inspection findings were recorded in the site inspection checklists and provided to the contractors to follow up. HSF movements under the SkyPier Plan were audited, showing compliance with speed limits. Bi-weekly audit of the MSS were conducted, ensuring the contractors full complied with the requirements of the MTRMP-CAV.

The recommended environmental mitigation measures, as included in the EM&A programme, were effectively implemented during the reporting period. Also, the EM&A programme implemented by the ET has effectively monitored the construction activities and ensured the proper implementation of mitigation measures.

[1] The Manual is available on the Project’s dedicated website (accessible at: http://env.threerunwaysystem.com/en/index.html)