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 Three civil construction works contracts of the Project have been awarded since December 2021. The construction of the Project commenced in December 2021 and these three works contracts are expected to complete in 2024. 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
1731	Trial Piles and Site Formation for Siu Ho Wan Depot Property Development – Phase 1	January 2023	Gammon Construction Ltd.	WSP (Asia) Ltd.
1732	Cable bridges and associated civil works for cable diversion	December 2021	Paul Y – CRCCI JV	Acuity Sustainability Consulting Ltd.
1733	Vehicular Access Bridge, Demolition of Paint Shop and Construction of EV Stabling Tracks	April 2022	Build King Civil Engineering Ltd.	SGS Hong Kong Ltd.

1.3 Purpose of the Report

1.3.1 The Environmental Monitoring and Audit (EM&A) programme for the Project commenced in December 2021. This is the twenty sixth 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 January 2024.

2 Environmental Monitoring and Audit

2.1 EM&A Results

2.1.1 The EM&A Report for Works Contract 1731, 1732 and 1733 prepared by the Contractor’s ET are provided in Appendices A to C. 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
1731	Overall	· Site Clearance & Hoarding · Pre-drilling Works · Bored Piling Works
1732	Overall	· Instrumentation monitoring · Draw pits, cable ducts and cable trough works at depot · EVA construction and watermain installation · Additional footings and civil works at test track and east level crossing · Cable containments at the footing for cable diversion · Cable bridge E&M works
1733	Overall	· LV Diversion · Construction of EV Stabling Track and Vehicular Access Bridge · Road Work · Concrete Pavement · E&M Work · Site Formation Work · Chain Link Fence Construction · Site Clearance

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 Tables 2.2. Details of the monitoring requirements, locations, equipment and methodology are presented in Appendices A to C of this Report.

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 1731, 1732 & 1733*
DM1	Siu Ho Wan Government Maintenance Depot	58.8 – 69.1	294.7	500	No

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 1731, 1732 & 1733

DM1

Siu Ho Wan Government Maintenance Depot

58.8 – 69.1

294.7

500

2.1.4 No environmental complaints, 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 2.3.

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
1731	0	0	0
1732	0	0	0
1733	0	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.

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 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)
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)
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)
Condition 2.11	Noise Mitigation Plan	31 Mar 2023 (1^st submission) 31 Jul 2023 (2^nd submission) 20 Oct 2023 (3^rd submission)
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 2.15	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.25 (December 2023)	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)