Table of Contents

1......... Introduction. 1

1.1 Background. 1

1.2 Project Programme. 1

1.3 Purpose of the Report 1

2......... Environmental Monitoring and Audit. 2

2.1 EM&A Results. 2

3......... implementation status on the environmental protection requirements. 4

List of Tables

Table 1.1 Summary of Awarded Works Contracts

Table 2.1 Summary of Major Construction Activities in the Reporting Period

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

Table 2.3 Log for Environmental Complaints, Notification of Summons and Successful Prosecutions for the Reporting Month

Table 3.1 Summary of EP Submissions Status

List of Appendices

Appendix A       Monthly EM&A Report for October 2025 – Oyster Bay Station and Associated Works Contract 1701

1 Introduction

1.1 Background

1.1.1 MTR Corporation Limited (MTRCL) had commenced a study to formulate a technically feasible development scheme for the Proposed Comprehensive Residential and Commercial Development atop Siu Ho Wan Depot (hereinafter referred to the “Oyster Bay (OYB) Property Development”) to optimize housing supply.  To facilitate the construction of the OYB Property Development, railway related works would be required.  The existing Siu Ho Wan Depot (SHD) will undergo replanning works to make room for the phased construction of the OYB Property Development, while maintenance and supporting services to the existing Tung Chung Line (TCL), Airport Express Line (AEL) and Disneyland Resort Line (DRL) should be maintained without causing disruption to the normal operation.  A new Oyster Bay (OYB) Station (formerly named as Siu Ho Wan Station (SHO)) has also been proposed along the TCL tracks to meet transport needs of the OYB Property Development and enable building of a sustainable community.

1.1.2 The Environmental Impact Assessment (EIA) Report (Register No.: AEIAR-214/2017) for the SHO and SHD Replanning Works (hereafter referred to as the “Project”) was approved on 29 November 2017 under the Environmental Impact Assessment Ordinance (EIAO).  Following the approval of the EIA Report, an Environmental Permit (EP) was granted on 22 March 2021 (EP No: EP-588/2021) for the construction and operation of the Project.

1.2 Project Programme

1.2.1 Four civil construction works contracts of the Project have been awarded since December 2021. The construction of the Project commenced in December 2021. The major works for Works Contracts 1731, 1732 and 1733 have been substantially completed in October 2024, while Works Contract 1701 is expected to complete in 2030. 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
1701	Oyster Bay Station and Associated Works	April 2024	China State Construction Engineering (HK) Ltd.	Aurecon Hong Kong Ltd.
1731 ^[1]	Trial Piles and Site Formation for Siu Ho Wan Depot Property Development – Phase 1	January 2023	Gammon Construction Ltd.	WSP (Asia) Ltd.
1732 ^[1]	Cable bridges and associated civil works for cable diversion	December 2021	Paul Y – CRCCI JV	Acuity Sustainability Consulting Ltd.
1733 ^[1]	Vehicular Access Bridge, Demolition of Paint Shop and Construction of EV Stabling Tracks	April 2022	Build King Civil Engineering Ltd.	SGS Hong Kong Ltd.

Note:

[1] The construction works for Works Contracts 1731, 1732 and 1733 were substantially completed in October 2024.

1.3 Purpose of the Report

1.3.1 The EM&A programme for the Project commenced in December 2021. This is the forty-seventh EM&A Report for the Project which summarises the EM&A works undertaken by the respective Contractor’s ETs during the period from 1 to 31 October 2025.

2 Environmental Monitoring and Audit

2.1 EM&A Results

2.1.1 The EM&A Report for Works Contract 1701 prepared by the Contractor’s ET is provided in Appendix A. The EM&A Report provides details of the project information, EM&A requirements, impact monitoring and audit results for the Contract. 

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

Table 2.1          Summary of Major Construction Activities in the Reporting Period

Works Contract	Site	Construction Activities
1701	Overall	· Site clearance, UU diversion, ABWF and BS works, drainage and road work and track works; · Bored pile, predrill and pre-bored H pile, precautionary sheet pile and ELS works; and · RP fencing installation, trial grouting works.

2.1.3 During the reporting period, impact monitoring for air quality was conducted in accordance with the EM&A Manual. No exceedances of the Action / Limit Level of 1-hour TSP due to the Project construction were recorded. Results of air quality is summarised in Table 2.2. Details of the monitoring requirements, locations, equipment and methodology are presented in Appendix A of this Report.

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

Monitoring Station ID	Location	TSP Concentration (µg/m^3)	Action Level (µg/m^3)	Limit Level (µg/m^3)	Exceedance due to the Project Construction (Yes/No)
Works Contract 1701
DM1	Siu Ho Wan Government Maintenance Depot	2.0 – 22.0	294.7	500	No

2.1.4 One environmental complaint, no notification of summons and no successful prosecutions were recorded in the reporting period. Log for environmental complaints, notification of summons and successful prosecutions is provided in Table 2.3.

Table 2.3          Log for Environmental Complaints, Notification of Summons and Successful Prosecutions for the Reporting Month

Works Contract	Environmental Complaints	Notification of Summons	Successful Prosecutions
1701	1	0	0

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

2.1.6 A summary of the major construction activities undertaken by the Contractor of Works Contract in the next three reporting months is presented in Table 2.4.

Table 2.4          Summary of Major Construction Activities in the Next Three Reporting Months

Works Contract	Site	Construction Activities
1701	Overall	· UU diversion, survey, trial pit, launching shaft mobilization works, typhoon door construction and installation · Precautionary sheet pile, pipe pile, bored pile, pre-bored H piles, resume mini pile, ELS for pile caps, pad footings, pile caps and ground beams construction works · Construction level crossing, RP fencing, pre-grouting, trial grouting works, OHL construction and track works, and PBSHP installation

3 implementation status on the environmental protection requirements

3.1.1 The Contractor has implemented all mitigation measures and requirements as stated in the EIA Report, EM&A Manual and EP (EP No: EP-588/2021). 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-588/2021)	Submission	Submission date
Condition 1.12	Commencement Date of Construction	11 Jun 2021 (1^st submission) 12 Jul 2021 (2^nd submission) 12 Aug 2021 (3^rd submission)
Condition 1.14	Commencement Date of Operation	No later than 3 months before commencement of operation
Condition 2.7	Construction Works Phasing Schedule Proposal	1 Nov 2021 (1^st Submission) 20 Dec 2021 (2^nd Submission) 29 Dec 2021 (Deposited) 9 October 2023 (1^st Submission with updated Phase 1 works) 30 Nov 2023 (Deposited)
Condition 2.8	Environmental Permit Submission Schedule	12 Aug 2021 10 Sep 2021 (Deposited) 16 May 2025 (Updated)
Condition 2.9	Management Organization	1 Nov 2021 (1^st Submission) 20 Dec 2021 (2^nd Submission) 21 Mar 2022 (3^rd Submission) 9 Aug 2022 (4^thSubmission) 16Nov 2022 (5^th Submission) 18 Sep 2023 (6^th submission) 22 Jan 2024 (7^th Submission) 21 Mar 2025 (8^th Submission)
Condition 2.10	Construction Noise Mitigation Plan	1 Nov 2021 (1^st Submission) 20 Dec 2021 (2^nd Submission) 28 Dec 2021 (Deposited) 30 Dec 2022 (1^st Submission which covered Phase 1 main works) 29 Mar 2023 (2^nd Submission which covered Phase 1 main works) 18 May 2023 (3^rd Submission which covered Phase 1 main works) 28 Jul 2023 (4^th Submission for Phase 1 works) 30 Oct 2023 (5^th Submission for Phase 1 works) 6 Dec 2023 (6^th Submission for Phase 1 works) 8 Dec 2023 (Deposited) 21 Jun 2024 (7^th Submission for Phase 1 works) 14 Feb 2025 (8^th Submission for Phase 1 works) 9Sep 2025 (9^th Submission for Phase 1 works)
Condition 2.11	Noise Mitigation Plan	31 Mar 2023 (1^st submission) 31 Jul 2023 (2^nd submission) 20 Oct 2023 (3^rd submission) 7 Mar 2024 (4^th submission) 18 Mar 2024 (Approved)
Condition 2.12	Fixed Plant Noise Audit Report	To be submitted at least 1 month before commencement of operation of certain phase of the replanned SHD
Condition 2.13	Waste Management Plan	1 Nov 2021 (1^st Submission) 20 Dec 2021 (2^nd Submission) 28 Dec 2021 (Deposited) 30 Jun 2023 (1^st Submission for Phase 1 work) 1 Aug 2023 (2^nd Submission for Phase 1 works) 31 Aug 2023 (Deposited for Phase 1 works)
Condition 2.14	Updated Contamination Assessment Plan	To be submitted no later than 2 months before the commencement of site investigation works at the contaminated areas identified in the approved EIA report ^[1]
Condition 2.15	Landscape and Visual Plan(s)	27 Apr 2023 (1^st Submission) 27 Jul 2023 (2^nd Submission) 20 Oct 2023 (3^rd Submission) 8 Dec 2023 (Approved)
Condition 3.3	Baseline Monitoring Report	1 Nov 2021 16 Nov 2021 (Deposited)
Condition 3.4	Monthly EM&A Report No. 46 (September 2025)	Submitted within 10 working days after the end of the reporting month
Condition 4.2	Dedicated Internet Website	12 Jan 2022 25 Jul 2023 (update address) 14 Mar 2024 (update address)

Note:

[1] EPD acknowledged that Phase 1 works of the Project will not disturb/encroach into potential land contamination areas identified in the approved EIA Report on 6 May 2025.

Appendix A

Monthly EM&A Report for October 2025

Oyster Bay Station and Associated Works Contract 1701