1 Introduction

1.1 Background

1.1.1 The Railway Development Strategy 2014 (RDS-2014) announced by the Government of the Hong Kong Special Administrative Region included the conceptual scheme of Tung Chung West (TCW) Extension and a possible Tung Chung East (TCE) Station.

1.1.2 This new railway system has been included in the approved Schedule 3 Environmental Impact Assessment (EIA) for Tung Chung New Town Extension (TCNTE), which has included the new stations at TCE area and TCW area and the associated trackwork and tunnel. However, a separate Schedule 2 EIA study for this railway system is conducted to address the associated environmental impacts, taking into account of the latest design.

1.1.3 The EIA Report for Tung Chung Line Extension (the Project) was approved on 12 July 2022 (Register No. AEIAR-235/2022). The Environmental Permit (EP) No. EP-614/2022 was then issued on 9 August 2022.

1.2 Project Programme

1.2.1 Two construction Works Contracts of the Project have been awarded since May 2023. The construction of the Project commenced in June 2023 and is expected to complete in 2029. Table 1.1 summarises the information of the awarded Works Contracts.

Table 1.1 Summary of Awarded Works Contracts

Works Contract	Description	Construction Start Date	Contractor	Environmental Team
1201	Tung Chung West Station and Tunnels	June 2023	Bouygues – Dragages (1201) JV	AECOM Asia Co. Ltd.
1202	Tung Chung East Station and Associated Enabling Works for Track Diversions	July 2023	Paul Y. – CRCC (TUE1202) JV	Acuity Sustainability Consulting Limited

1.3 Purpose of the Report

1.3.1 The Environmental Monitoring and Audit (EM&A) programme for the Project commenced in June 2023. This is the thirty-first EM&A Report for the Project which summarises the EM&A works undertaken by the respective Contractor’s ET during the period from 1 to 31 December 2025.

2 Environmental Monitoring and Audit

2.1 EM&A Results

2.1.1 The EM&A Report for Works Contracts 1201 and 1202 prepared by the Contractor’s ET are provided in Appendix A and Appendix B. The EM&A Report provides details of the project information, EM&A requirements, impact monitoring and audit results for the Contracts.

2.1.2 A summary of the major construction activities undertaken by the Contractor of Works Contract during the reporting period are presented in Table 2.1.

Table 2.1 Summary of Major Construction Activities in the Reporting Period

Works Contract	Site	Construction Activities
1201	Tung Chung West (TCW) Area	TCW · Superstructure · ELS · Station structure · Ground Treatment · TBM U-turn
	Tung Chung Crescent (TCC) and Tung Chung Ancillary Building (TCA) Areas	TCC · Site Roof Canopy · U/T Shaft Structural Works · D/T Shaft ELS TCA · Shaft Structure · Superstructure · Slurry Treatment Plant Improvement · Trench Excavation for CLP cabling · ABWF and BS works Tunnel between TCC and TCW · TBM D/T Tunnelling · TBM U-Turn · Invert & Walkway – U/T Tunnel · Sump Pit Excavation
	Barging Facility Area	· Site setup · Material storage
1202	Tung Chung East (TCE) Area	TCE Station · Superstructure works for main station, link bridge support, ancillary buildings and extended area at station · Temporary works of tower crane operation and traffic diversion · Construction of underground utilities · ABWF works, building services and E&M system installation Integrated Entrance (IE) and Temporary Works Area in Area 113 · Truss fabrication and installation · Superstructure works · ABWF works and Building Service installation · Temporary works – pavement removal East and West Sides of TCE Station · Drainage works · Track diversion and civil enabling works Car Park · ABWF works and E&M works · Genset installation Trackside Works · Construction works for OHL installation · Construction works for cable installation

2.1.3 During the reporting month, impact monitoring for air quality and construction noise were conducted in accordance with the EM&A Manual. One Action Level of air quality was triggered at DM-4, and repeated measurement was conducted in accordance with EM&A Manual. The result of repeated measurement complied the Action Level, it is considered the exceedance is an isolated case and non-project related. No exceedance of Limit Level of 1-hour TSP was recorded. One noise-related complaint due to the Project construction was received which triggered the Action Level of construction noise. No exceedance of Limit Level of construction noise is recorded. Results of air quality and construction noise are summarised in Tables 2.2 and 2.3 respectively. Details of the monitoring requirements, locations, equipment and methodology are presented in the EM&A Report (Appendix A and Appendix B).

Table 2.2 Summary of 1-Hour TSP Monitoring Results in the Reporting Period

Monitoring Station ID	Location	TSP Concentration (µg/m³)	Action Level (µg/m³)	Limit Level (µg/m³)	Exceedance due to the Project Construction (Yes/No)
*Works Contract 1201*
DM-2	Sheraton Hong Kong Tung Chung Hotel Shopping Mall	80.5 – 226.2	326	500	No
DM-3	Shops at Tung Chung Crescent	35.5 – 192.5	327	500	No
DM-4	Yat Tung Shopping Centre	40.8 – 329.0	312	500	No
DM-5b⁽²⁾	Ma Wan Chung Village	24.2 – 140.2	333	500	No
*Works Contract 1202*
DM-1b⁽³⁾	G/F of Ying Yuet House	62.1 – 165.6	327	500	No
DM-1a	TCNTE East - Planned Commercial Development (COM-1/Area 57)	N/A⁽⁴⁾	342	500	No

Note:

(1) Impact monitoring to be carried out during the construction period of corresponding activity

(2) Alternative monitoring location to DM-5 Ma Wan Chung Village in the approved EM&A Manual

(3) Alternative monitoring location to DM-1 Rosita Yuen Kindergarten in the approved EM&A Manual

(4) Impact monitoring to be carried out upon the commence of operation and during the construction period of the corresponding activity

Table 2.3 Summary of Construction Noise Monitoring Results in the Reporting Period

Monitoring Station ID	Location	Noise Level (L_eq,_30mins, dB(A))	Limit Level (L_eq,_30mins, dB(A))	Exceedance due to the Project Construction (Yes/No)
*Works Contract 1201*
NM2	Block 9 of Tung Chung Crescent	Below Baseline Level	75	No
NM3a⁽²⁾	2/F rooftop of Yat Tung Shopping Centre	71.0 – 72.5	75	No
*Works Contract 1202*
NM1	Ying Tung Estate	55.7 – 66.9	75	No
NM4	Tung Chung Area 113	N/A⁽¹⁾	75	No
NM6	Tung Chung Area 100	N/A⁽¹⁾	75	No

Note:

(1) Impact monitoring to be carried out upon the intake of the population and during the construction period of the corresponding activity

(2) Alternative monitoring location to NM3 Yat Tung Estate in approved EM&A Manual

2.1.4 Two environmental complaints, and no notification of summons and successful prosecutions were recorded in the reporting period. Log for environmental complaints, notification of summons and successful prosecutions is provided in Table 2.4.

Table 2.4 Log for Environmental Complaints, Notification of Summons and Successful Prosecutions for the Reporting Month

Works Contract	Environmental Complaints	Notification of Summons	Successful Prosecutions
1201	2	0	0
1202	0	0	0

2.1.5 Regular site inspections were conducted by the Contractor’s ET on a weekly basis to check the implementation of environmental pollution control and mitigation measures for the Project. No non-conformance was identified in the reporting period.

3 implementation status on the environmental protection requirements

3.1.1 The respective Contractors have implemented all mitigation measures and requirements as stated in the EIA Report, EM&A Manual and EP (EP-614/2022). The status of required submissions under the EP as of the reporting period are summarised in Table 3.1.

Table 3.1 Summary of EP Submissions Status

EP Condition (EP-614/2022)	Submission	Submission date
Condition 1.12	Notification of Commencement Date of Construction	9 Mar 2023 9 May 2023 (updated)
Condition 1.14	Notification of Commencement Date of Operation	No later than 1 month prior to the commencement of operation
Condition 2.9	Notification of Setup of Community Liaison Group	21 Mar 2023
Condition 2.10	Construction Works Phasing Schedule	14 Apr 2023 (deposited)
Condition 2.11	EP Submission Schedule	14 Apr 2023 (deposited)
Condition 2.12	Management Organization	28 Apr 2023 18 Sep 2023 (updated) 22 Jan 2024 (updated) 27 Feb 2025 (updated)
Condition 2.13	Construction Noise Management Plan (CNMP) · Works Contract No. 1201 · Works Contract No. 1202	10 Mar 2023 31 May 2023 (approved) 25 Sep 2023 (approved) 30 Oct 2023 (approved) 8 Nov 2024 (approved) 12 Dec 2025 30 Dec 2025 10 Mar 2023 27 Jun 2023 (approved) 12 Sep 2023 (approved) 1 Nov 2023 (approved) 19 Mar 2025 (approved) 3 Nov 2025 (approved)
Condition 2.14	Rail Noise Mitigation Plan (RNMP)	13 Jan 2023 25 Aug 2023 (approved)
Condition 2.15	Plan on Noise Enclosure at Tung Chung Crescent	13 Apr 2023 29 Aug 2023 (approved) 1 Nov 2024 (approved)
Condition 2.16	Compensatory Tree Planting Implementation Plan	31 Oct 2025 29 Dec 2025
Condition 2.17	Landscape and Visual Mitigation Plan (LVMP)	12 Apr 2023 13 Dec 2024 (deposited) 16 Apr 2025 (deposited)
Condition 2.18	Contingency and Response Plan	14 Nov 2024 17 Feb 2025 (approved)
Condition 2.19	Wastewater Management Plan (WWMP)	9 Mar 2023 29 May 2023 (approved) 13 Sep 2023 (approved)
Condition 2.20	Waste Management Plan (WMP)	16 Feb 2023 30 Mar 2023 (deposited)
Condition 2.23	Further Archaeological Testing Report	28 Sep 2022 22 May 2023 (deposited)
Condition 2.25	Fixed Plant Noise Audit Report	To be submitted at least 1 month before commencement of operation of the Project
Condition 3.3	Baseline Monitoring Report	28 Apr 2023 17 May 2023
Condition 3.4	Monthly EM&A Report No.1 to 30 Monthly EM&A Report No.31	Reported in previous Monthly EM&A Reports This submission
Condition 4.2	Dedicated Internet Website	10 Jul 2023 15 Mar 2024 (updated)

Appendix A

Monthly EM&A Report

for

Contract 1201

Tung Chung West Station and Tunnels

(December 2025)

Appendix B

Monthly EM&A Report

for

Contract 1202

Tung Chung East Station and Associated Enabling Works for Track Diversions

(December 2025)