Contents

Abbreviations

Executive summary

1 Introduction

1.1 Background

1.2 Scope of this Report

1.3 Project Organisation

1.4 Contact information for the Project

1.5 Summary of Construction Works

1.6 Summary of EM&A Programme Requirements

2 Environmental Monitoring and Auditing

2.1 Air Quality Monitoring

2.1.1 Action and Limit Levels

2.1.2 Summary of Monitoring Results

2.1.3 Conclusion

2.2 Noise Monitoring

2.2.1 Action and Limit Levels

2.2.2 Summary of Monitoring Results

2.2.3 Conclusion

2.3 Water Quality Monitoring

2.4 Waste Monitoring

2.4.1 Action and Limit Levels

2.4.2 Summary of Monitoring Results

2.4.3 Marine Sediment Management

2.5 Chinese White Dolphin Monitoring

2.5.1 Summary of Monitoring Results

2.6 Environmental Site Inspection

2.6.1 Landscape and Visual Mitigation Measures

2.6.2 Land Contamination Assessment

2.7 Audit of SkyPier High Speed Ferries

2.8 Audit of Construction and Associated Vessels

2.9 Review of the Key Assumptions Adopted in the EIA Report

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

3.1 Compliance with Other Statutory Environmental Requirements

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

3.2.1 Complaints

3.2.2 Notifications of Summons or Status of Prosecution

3.3 Cumulative Statistics

4 Conclusion and Recommendation

Tables

Table 1.1: Contact Information of Key Personnel

Table 1.2: Contact Information of the Project

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

Table 2.1: Impact Air Quality Monitoring Stations

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

Table 2.3: General Meteorological Condition during Impact Air Quality Monitoring

Table 2.4: Impact Noise Monitoring Stations

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

Table 2.6: General Meteorological Condition during Impact Noise Monitoring

Table 2.7: Action and Limit Levels for Construction Waste

Table 2.8: Construction Waste Statistics

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

Table 2.10: Summary of Photo Identification

Table 2.11: Landscape and Visual – Construction Phase Audit Summary

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

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

Table 3.1: Summary of Environmental Complaints

Table 3.2: Statistics for Valid Exceedances for the Environmental Monitoring

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

Figures

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.

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).

This is the 38^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 April 2025 to 30 June 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 concourse superstructure works, pavement 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.

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	102
Noise monitoring	54
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 and audit of implementation of Marine Mammal Watching Plan (MMWP) and Dolphin Exclusion Zone (DEZ) Plan were conducted in the reporting period. Based on the information including ET’s observations, records of Maritime Surveillance System (MSS), Marine Travel routes records 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

Provision of automated water spraying at the stockpiling area	Provision of oil spillage drill for site personnel	Erection of noise insulation materials

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

1. Provision of automated water spraying at the stockpiling area by the contractor to suppress dust nuisance.

2. Provision of oil spillage drill for site personnel by the contractor.

3. Erection of noise insulation materials by the contractor to minimise the noise nuisance.

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 25 April 2025.	ET investigated the case and found that mixing works had been carried out at South Wing Level 6 of Terminal 2 Concourse. The contractor enhanced dust mitigation measures and provided worker training. No dust-related issues were observed during ET’s inspections. The case is 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 38^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 April 2025 to 30 June 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 (Airport Authority Hong Kong)	Principal Manager, Environmental Compliance, Sustainability	Lawrence Tsui	2183 2734
Environmental Team (ET) (Mott MacDonald Hong Kong Limited)	Environmental Team Leader	Terence Kong	2828 5919
	Deputy Environmental Team Leaders	Heidi Yu	2828 5704
		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
Contract 3601 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
	Environmental 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
	Contractor Representative	Ivan Lai	9507 6464
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
	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.

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 concourse superstructure works, pavement 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.

The locations of the key construction activities after commissioning of 3RS are presented in Figure 1.1.

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.

Parameters	EM&A Requirements	Status
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 2^nd audit was conducted in May 2025. The 1^st audit was 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	Marine Mammal Watching Plan (MMWP) implementation measures was conducted in May and June 2025.
Dolphin Exclusion Zone (DEZ) Plan implementation measures	Monitor and check	Dolphin Exclusion Zone (DEZ) monitoring was conducted in May and June 2025.
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	All monitoring required under Silt Curtain Deployment Plan measure was completed on 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-eight 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/m^3)	Limit Level (mg/m^3)
AR1A	Man Tung Road Park	306	500
AR2	Village House at Tin Sum	298

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
Apr 2025	100%	100%
May 2025	100%	100%
Jun 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
Mar 2025	Sunny to Cloudy	Southwest to Northwest
Apr 2025	Sunny to Cloudy	Northeast to Northwest
May 2025	Sunny to Cloudy	North to Southwest
Jun 2025	Sunny to Cloudy	East 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
Apr 2025	100%	100%	100%	100%
May 2025	100%	100%	100%	100%
Jun 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
Mar 2025	Sunny to Cloudy
Apr 2025	Sunny to Overcast
May 2025	Sunny to Cloudy
Jun 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 (m^3)	C&D Material Reused in the Project (m^3)	C&D Material Reused in other Projects (m^3)	C&D Material Transferred to Public Fill^(^2)(m^3)	Chemical Waste (kg)	Chemical Waste (l)	General Refuse (tonne)
This reporting period
Apr 2025	760	1,885	0	4,680	0	0	4,336
May 2025	692	841	0	3,654	0	600	3,282
Jun 2025^(3)	782	577	0	2,964	0	0	3,209
Total	2,234	3,303	0	11,298	0	600	10,814
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.9.

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 April to June 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 1,347 km of survey effort was collected from these surveys, with around 98.4% 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 April to June 2025, there were a total of 29 sightings of CWD, with 67 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, 23 sightings with a total of 50 dolphins and five sightings with a total of 15 dolphins were recorded in WL and SWL respectively during the current reporting period. One sighting of two dolphins was recorded in NWL. No CWD was sighted in the NEL survey area.

Compared with the previous quarter (i.e. January to March 2025), the total number of CWD sightings and the total number of the dolphins have decreased by 45% and 39% respectively. Overall, the current reporting quarter has shown a declining trend in both dolphin sightings and the number of dolphins across all survey areas except SWL with a slightly increase in the number of dolphins.

Compared with the same quarter of last year (i.e., April to June 2024), there was also a decrease in both the total number of sightings and the total number of dolphins by 17% and 34% respectively. In WL, there was a decrease in number of dolphins by 28% while the number of sightings were identical. In SWL, there was a decrease in both number of sightings and number of dolphins. Moreover, the total number of sightings and total number of dolphins in NWL are similarly low to 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 April to June 2024	Previous Reporting Period January to March 2025	Current Reporting Period April to June 2025
NEL	0 (0)	0 (0)	0 (0)
NWL	2 (2)	6 (13)	1 (2)
AW	0 (0)	2 (4)	0 (0)
WL	23 (69)	37 (83)	23 (50)
SWL	10 (23)	8 (10)	5 (15)
Total	35(101)	53 (110)	29 (67)

Note: Values in ( ) represent number of dolphins

The distribution of CWD sightings recorded from April to June 2025 is illustrated in Figure 2.3. In NWL, a CWD sighting was recorded at the waters near Castle Peak Power Station. This marks the first sighting in this part of the NWL survey area since 2022. 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 Tung 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 April to June 2025

Remarks: (1) Please note that there are 29 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 April to June 2025, the group size of CWD sightings ranged from one to seven dolphins. The average group size of CWD was 2.31 dolphins per group, which is larger than that of the last quarter (2.08 dolphins per group). However, the average group size of CWD sightings in this reporting quarter is smaller when compared to the same quarter of last year (2.89 dolphins from April to June 2024)

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 29 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 April to June 2025, eight sightings of CWD were recorded with foraging activities. Amongst them, three sightings were observed associated with operating purse seiners in WL.

Sightings with foraging activities recorded in the current reporting period was lower than that in the previous reporting period (i.e., 12 sightings involved foraging activities between January and March 2025). The number of CWD sightings with foraging activities in this reporting period is identical to that of the same quarter of last year (i.e., eight sightings between April and June 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 April to June 2025, four sightings of CWD were recorded with the presence of mother-and-unspotted juvenile pairs and/or mother-and-calf pair, which remain consistent with the previous reporting quarter (i.e., four sightings between January and March 2025). The number of CWD sightings with the presence of mother-calf pairs was also the same as the same quarter of last year (i.e., four sightings between April and June 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 April and June 2025, a total number of 24 different CWD individuals were identified altogether for a total of 32 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 24 different CWD individuals, six animals (i.e., SLMM003, SLMM023, SLMM025, SLMM052, WLMM150 and WLMM192) were sighted for more than once. The most frequently re-sighted individuals of this quarter are SLMM003 and SLMM052, both have been re-sighted three times.

Three individuals namely SLMM003, SLMM052 and WLMM150 were re-sighted in different survey areas during this reporting period. The numbers of CWD individuals re-sighted more than once was lower than that of the last report reporting period from January to March 2025 (i.e. 13 identified individuals) and the number of identified individuals that showed cross-area movement is slightly lower than in the last reporting period (i.e. four CWD individuals from January to March 2025).

A summary of photo identification works is presented in Table 2.10. Representative photos of the 24 identified individuals and figures depicting the sighting locations of the three 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	9-May-25	1	NWL	WLMM018	10-Jun-25	4	WL
NLMM090	17-Apr-25	2	WL	WLMM043	16-May-25	3	WL
NLMM095	9-May-25	1	NWL	WLMM056	17-Apr-25	3	WL
SLMM003	17-Apr-25	5	WL	WLMM067	16-May-25	4	WL
	9-Jun-25	2	SWL	WLMM068	16-May-25	4	WL
		3	SWL	WLMM109	10-Jun-25	4	WL
SLMM014	9-Jun-25	3	SWL	WLMM111	16-May-25	4	WL
SLMM023	17-Apr-25	5	WL	WLMM114	9-Jun-25	3	SWL
	6-Jun-25	2	WL	WLMM150	17-Apr-25	3	WL
SLMM025	9-Jun-25	2	SWL		9-Jun-25	5	SWL
		3	SWL	WLMM162	16-May-25	4	WL
SLMM031	15-Apr-25	12	SWL	WLMM163	17-Apr-25	5	WL
SLMM034	16-May-25	3	WL	WLMM190	10-Jun-25	1	WL
SLMM050	16-May-25	4	WL	WLMM192	9-Jun-25	2	SWL
SLMM052	17-Apr-25	5	WL			3	SWL
	9-Jun-25	2	SWL
		3	SWL

2.5.1.2 Site Audit for CWD-related Mitigation Measures

In April 2025, no marine construction works activities were carried out, and therefore DEZ monitoring was not required. During May and June 2025, one dolphin observation station and a team of at least two dolphin observers were deployed by the contractor to continuously monitor the DEZ for rock armour laying works in accordance with the DEZ Plan. From the contractor’s records, no dolphins or other marine mammals were observed in May and June 2025. The contractor’s records were also audited by ET during the site inspection. 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 3RS was commissioned on 28 November 2024.

The second audit of HSF implementation measures upon operation of 3RS was conducted in May 2025, covering period from 1 March 2025 to 31 May 2025. No SkyPier HSFs were recorded travelling between HKIA SkyPier and Zhuhai / Macau.

The first audit of Spill Responses Plan measures upon operation of 3RS was conducted in May 2025, covering the period from 28 November 2024 to 31 May 2025. No specific findings were observed during the audit.  

2.6 Environmental Site Inspection

Site inspections of the construction works were conducted by ET and IEC on a weekly and bi-weekly basis, respectively, to audit the implementation of proper environmental pollution control and mitigation measures for the Project. 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 served as a direct mechanism to reinforce the specified environmental protection requirements and pollution control measures at 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 automated water spraying at the stockpiling area by the contractor to suppress dust nuisance.

2. Provision of oil spillage drill for site personnel by the contractor.

3. Erection of noise insulation materials by the contractor to minimise the noise nuisance.

Provision of automated water spraying at the stockpiling area	Provision of oil spillage drill for site personnel	Erection of noise insulation materials

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. 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 remained unchanged (i.e. 76 nos.) comparing to the previous reporting quarter.

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.

For OM7, the annual site inspection for long-term management period was conducted in April and May 2025 and the bi-monthly site inspections for 12-month establishment period was conducted in May 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.	-
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.)
		Establishment Period	Maintenance Period
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 were 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.

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.

During the reporting period, the SkyPier HSF travelling to and from Zhuhai and Macau has been suspended until further notice. No SkyPier HSFs were recorded travelling HKIA SkyPier and Zhuhai / Macau.

2.8 Audit of Construction and Associated Vessels

The updated Marine Travel Routes and Management Plan for Construction and Associated Vessels (MTPMP-CAV) was approved by EPD on 16 May 2025 under EP Condition 2.9.

Following its implementation, the Marine Surveillance System (MSS) automatically recorded any deviations, while the ET conducted bi-weekly audit of relevant information including AIS data, vessel tracks and other relevant records up to May 2025. Starting from June 2025, the ET transitioned to auditing construction and associated vessels activities based on the marine travel routes records submitted by the contractors, ensuring compliance with the MTRMP-CAV requirements.

To support effective vessel management, the contactors continued to submit 3-month rolling vessel plans for construction vessel activities to AAHK in order to help maintain the number of construction vessels at a practicable minimum. The IEC also carried out compliance audits as part of the EM&A programme.

During April and May 2025, deviations including speeding and entry into no-entry zones were identified. After investigation by the contractors’ Construction Traffic Control Centre (CTCC) representatives, all the concerned captains were reminded to adhere strictly to the MTRMP-CAV requirements.

In June 2025, the ET commenced audits based on the marine travel routes records submitted by contractors.  Observations regarding malfunctioning AIS performance on the construction and associated vessels were recorded. The concerned contractor has been followed up to address the AIS performance issues on their vessels. All relevant contractors were reminded to comply with the MTRMP-CAV requirements.

Furthermore, a skipper training workshop was held by contractor’s Environmental Officer, attended by one skipper.  A competency test was subsequently conducted by the ET to assess the trained skipper’s understanding and adherence to the plan.

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
25 April 2025	A complaint regarding dust nuisance was received.	A complaint was received on 25 April 2025 concerning dust nuisance at South Wing Level 6 of Terminal 2 Concourse. In accordance with the Project’s Manual and Complaint Management Plan, the ET initiated an investigation. The relevant contractor confirmed that mixing works had been conducted in the area. Prior to resuming such activities, dust mitigation measures were enhanced and training was provided to workers. ET conducted site inspections and did not observe any dust-related items. The contractor was reminded to continue reviewing dust control measures and ensure proper training is provided before future mixing works. Based on the findings, the complaint case is considered resolved and 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
	Limit Level	0	0
Noise	Action Level	0	0
	Limit Level	0	0
Waste	Action Level	0	1
	Limit Level	0	0
Water	Action Level	Nil^(^2)	0
	Limit Level	Nil^(^2)	0
CWD	Action Level	Nil^(^3)	0
	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	82	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 second 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 pavement, concourse superstructure, and tunnel works for AMP and BHS in reclamation areas, and T2 expansion, utilities, road and drainage works excavation 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 29 sightings of 67 dolphins under favourable conditions.

Regular site inspections were conducted to ensure implementation of appropriate environmental pollution control and mitigation measures. Findings from these inspections were recorded in the site inspection checklists and issued to the contractors for their action. No SkyPier HSFs were recorded travelling HKIA SkyPier and Zhuhai / Macau.  Audit of the MSS and marine travel routes records were conducted, ensuring the contractors fully complied with the requirements of the MTRMP-CAV.

The recommended environmental mitigation measures outlined in the EM&A programme were effectively implemented during the reporting period. Also, the EM&A programme as carried out 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)