Expansion of Hong Kong

International Airport into a

Three-Runway System

 

Construction Phase Quarterly EM&A Report

No.24 (1 October to 31 December 2021)

March 2022

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Contents

Abbreviations  1

Executive summary  3

1       Introduction  7

1.1      Background  7

1.2      Scope of this Report 7

1.3      Project Organisation  7

1.4      Contact information for the Project 11

1.5      Summary of Construction Works  12

1.6      Summary of EM&A Programme Requirements  12

2       Environmental Monitoring and Auditing  16

2.1      Air Quality Monitoring  16

2.1.1        Action and Limit Levels  16

2.1.2        Summary of Monitoring Results  16

2.1.3        Conclusion  17

2.2      Noise Monitoring  17

2.2.1        Action and Limit Levels  17

2.2.2        Summary of Monitoring Results  17

2.2.3        Conclusion  18

2.3      Water Quality Monitoring  18

2.3.1        Action and Limit Levels  19

2.3.2        Summary of Monitoring Results  20

2.3.3        Conclusion  22

2.4      Waste Monitoring  22

2.4.1        Action and Limit Levels  22

2.4.2        Summary of Monitoring Results  23

2.4.3        Marine Sediment Management 23

2.5      Chinese White Dolphin Monitoring  24

2.5.1        Action and Limit Levels  24

2.5.2        Summary of Monitoring Results  24

2.6      Sewage Flow Monitoring  33

2.6.1        Brief Summary of the Agreed Method  33

2.6.2        Desk-Based Monitoring Result 34

2.7      Environmental Site Inspection  34

2.7.1        Landscape and Visual Mitigation Measures  35

2.7.2        Land Contamination Assessment 41

2.8      Audit of SkyPier High Speed Ferries  41

2.9      Audit of Construction and Associated Vessels  42

2.10     Review of the Key Assumptions Adopted in the EIA Report 42

3       Report on Non-compliance, Complaints, Notifications of Summons and Prosecutions  43

3.1      Compliance with Other Statutory Environmental Requirements  43

3.2      Analysis and Interpretation of Complaints, Notification of Summons and Status of Prosecutions  43

3.2.1        Complaints  43

3.2.2        Notifications of Summons or Status of Prosecution  46

3.3      Cumulative Statistics  46

4       Conclusion and Recommendation  47

 

Tables

Table 1.1: Contact Information of Key Personnel 8

Table 1.2: Contact Information of the Project 11

Table 1.3: Summary of Status for All Environmental Aspects under the Updated EM&A Manual 12

Table 2.1: Impact Air Quality Monitoring Stations  16

Table 2.2: Percentage of Air Quality Monitoring Results within Action and Limit Levels  16

Table 2.3: General Meteorological Condition during Impact Air Quality Monitoring  16

Table 2.4: Impact Noise Monitoring Stations  17

Table 2.5: Percentage of Noise Monitoring Results within Action and Limit Levels  17

Table 2.6: General Meteorological Condition during Impact Noise Monitoring  18

Table 2.7: Monitoring Locations and Parameters for Impact Water Quality Monitoring  18

Table 2.8: Action and Limit Levels for General Water Quality Monitoring  20

Table 2.9: The Control and Impact Stations during Flood Tide and Ebb Tide for General Water Quality Monitoring  20

Table 2.10: Percentage of Water Quality Monitoring Results within Action and Limit Levels  21

Table 2.11: General Weather Condition and Sea Condition during Impact Water Quality Monitoring  21

Table 2.12: Summary of SS Compliance Status (Mid-Ebb Tide) 21

Table 2.13: Summary of SS Compliance Status (Mid-Flood Tide) 22

Table 2.14: Action and Limit Levels for Construction Waste  23

Table 2.15: Construction Waste Statistics  23

Table 2.16: Land-based Theodolite Tracking Survey Station Details  24

Table 2.17: Derived Values of Action Level and Limit Level for Chinese White Dolphin Monitoring  24

Table 2.18: Summary of Number of CWD Sightings and Number of Dolphins for the Same Quarter Last Year, Previous Quarter, and Current Reporting Period  25

Table 2.19: Summary of Monthly and Running Quarterly STG and ANI of Chinese White Dolphin for the Same Quarter Last Year, Previous Quarter, and Current Reporting Period  27

Table 2.20: Summary of Photo Identification  31

Table 2.21: Summary of Survey Effort and CWD Group of Land-based Theodolite Tracking Survey  31

Table 2.22: Landscape and Visual – Construction Phase Audit Summary  36

Table 2.23: Summary of the Number of Retained, Transplanted and To-be-transplanted Trees in the Reporting Period  37

Table 2.24: Summary of the Tree Status Updated in the Reporting Period  37

Table 2.25: Summary of the Transplanted Trees Updated in the Reporting Period  38

Table 2.26: Photos of the Existing Transplanted Trees in the Reporting Period  41

Table 3.1: Summary of Environmental Complaints  43

Table 3.2: Statistics for Valid Exceedances for the Environmental Monitoring  46

Table 3.3: Statistics for Non-compliance, Complaints, Notifications of Summons and Prosecution  46

 

Figures

Figure 1.1

Locations of Key Construction Activities

Figure 1.2

Latest Layout of the Enhanced Silt Curtain

Figure 2.1

Locations of Air and Noise Monitoring Stations and Chek Lap Kok Wind Station

Figure 2.2

Water Quality Monitoring Stations 

Figure 2.3

Vessel based Dolphin Monitoring Transects in Construction, Post-Construction, and Operation Phases

Figure 2.4

Land based Dolphin Monitoring Locations in Baseline and Construction Phases

Figure 2.5

Sightings Distribution of Chinese White Dolphins

Figure 2.6

 

Sighting Locations of Chinese White Dolphins with Different Group Sizes

Figure 2.7

Sighting Locations of Chinese White Dolphins Engaged in Different Behaviours

Figure 2.8

Sighting Locations of Mother-calf Pairs

Figure 2.9

 

Plots of First Sightings of All CWD Groups from Land-based Stations

Figure 2.10

Location for Passive Acoustic Monitoring

Figure 2.11

Schematic Diagram for Sewerage System Flow Monitoring

Figure 2.12

Sewerage System Collecting Sewage from Airport

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

HKBCF

Hong Kong-Zhuhai-Macao Bridge Hong Kong Boundary Crossing Facilities

HKIA

Hong Kong International Airport

HSF

High Speed Ferry

IEC

Independent Environmental Checker

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

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 24th 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 October 2021 to 31 December 2021.  

Key Activities in the Reporting Period

The key activities of the Project carried out in the reporting period included reclamation works and land-based works. Works in the reclamation areas included marine filling, seawall and facilities construction, together with runway and associated works such as bored piling for approach lights. Land-based works on existing airport island involved mainly airfield works, foundation and substructure work for Terminal 2 expansion, modification and tunnel work for Automated People Mover (APM) and Baggage Handling System (BHS), and preparation work for utilities, with activities include site establishment, site office construction, road and drainage works, cable ducting, demolition, piling, and 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

96

Noise monitoring

52

Water quality monitoring

37

Vessel line-transect surveys for Chinese White Dolphin (CWD) monitoring

6

Land-based theodolite tracking survey effort for 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), 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 information including ET’s observations, records of Maritime Surveillance System (MSS), and contractors’ site records, it is noted that environmental pollution control and mitigation measures were properly implemented and construction activities of the Project in the reporting period did not introduce adverse impacts to the sensitive receivers.

In accordance with Section 6.2.1.1 of the Manual, the methodology of annual sewage flow monitoring for the existing gravity sewer from the airport discharge manhole to Tung Chung Sewage Pumping Station (TCSPS) should be prepared and submitted to EPD one year before the scheduled commencement of operation of the proposed third runway. As such, the sewage flow monitoring methodology paper was prepared, submitted and subsequently approved by EPD on 21 June 2021. The annual sewage flow monitoring has also been started since June 2021. According to the daily flow monitoring record of Sewage Pumping Station 1 (SPS-1) located at the Airport from October to December 2021 (see Appendix C), the daily average flow of 16,319 m3/day for October 2021, 15,717 m3/day for November 2021 and 14,866 m3/day for December 2021 were well below 80% of pipe full flow capacity of 53,395.2 m3/day as defined in Section 2.6.3 of the approved sewage flow monitoring methodology paper. For the subsequent sets of sewage flow monitoring data for SPS-1, it will be presented in upcoming Quarterly and Annual EM&A Reports.

 

Snapshots of Good Environmental Practices in the Reporting Period

Use of sandbags and water-filled barriers for muddy water discharge prevention

Use of earth bund as speed cushion for dust suppression purpose

Provision of environmental training for site personnel

 

 

 

 

 

 

 

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

1.      Sandbags and water-filled barriers were placed along site boundary to prevent muddy water discharge to nearby swale.

2.      Earth bund as speed cushion was set up at haul road to reduce vehicle speed and minimise the generation of fugitive dust.

3.      Environmental training was provided to workers for proper waste management and chemical waste handling procedures.

 

Summary Findings of the EM&A Programme

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

Monitoring results of construction dust, construction noise, construction waste, and CWD monitoring did not trigger the corresponding Action and Limit Levels in the reporting period.

The water quality monitoring results for all parameters, except suspended solids (SS), obtained during the reporting period were within the corresponding Action and Limit Levels stipulated in the EM&A programme. Relevant investigation and follow-up actions will be conducted according to the EM&A programme if the corresponding Action and Limit Levels are triggered. For SS, some testing results triggered the relevant Action Levels, and the corresponding investigations were conducted accordingly. The investigation findings concluded that the cases were not related to the Project. To conclude, the construction activities in the reporting period did not introduce adverse impact to all water quality sensitive receivers.

 

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

Complaints Received

 

A complaint regarding dust issue at 3RS construction site area was received on 6 October 2021.

ET requested the relevant contractors to provide information related to the complaint. Regular site inspections and ad-hoc inspection were conducted in which no item related to insufficient water spraying was recorded. The contractors were reminded to continue implementing dust suppression measures, especially sufficient water spraying at the site area in accordance with the implementation schedule in the EM&A Manual. Hence, the case was considered closed.

 

A complaint regarding dust issue at 3RS construction site area near northeastern quay bus station was received on 29

 October 2021.

ET requested the relevant contractor to provide information related to the complaint. Regular site inspections and ad-hoc inspection were conducted in which no item related to dust issue was recorded and water spraying at the concerned location was observed. All contractors were reminded to properly implement dust suppression measures, especially water spraying at their site area in accordance with the implementation schedule in the Updated EM&A Manual. Hence, the case was considered closed.

 

A complaint regarding dust issue at 3RS construction site area was received on 7 November 2021.

ET requested the relevant contractor to provide information related to the complaint. During a regular site inspection, dust was observed when there was vehicle movement on haul road, and was rectified by the contractor afterwards. An ad-hoc inspection was conducted in which water spraying at the concerned haul road was observed. All contractors were reminded to properly implement dust mitigation measures, especially water spraying on the haul road in accordance with the implementation schedule in the Updated EM&A Manual. Hence, the case was considered closed. 

 

Two emails regarding dust issue were received on 15 November 2021.

ET requested the relevant contractor to provide information related to the complaint. During a regular site inspection, dust was observed when there was vehicle movement on haul road and was rectified by the contractor promptly. An ad-hoc inspection was conducted subsequently in which water spraying at the concerned haul road was observed. All contractors were reminded to properly implement dust mitigation measures, especially water spraying on the haul road in accordance with the implementation schedule in the Updated EM&A Manual. Hence, the case was considered closed. 

 

A complaint regarding Non-road Mobile Machinery (NRMM) issue at 3RS contractor’s works area was received on 24 November 2021.

ET requested the relevant contractor to provide information related to the complaint. According to the information received, the contractor had obtained a valid NRMM label for the concerned vehicle. All contractors were reminded to continue and regular update their NRMM plant inventory list, to self-check and ensure proper NRMM labels are displayed on their on-site vehicles and machines. Hence, the case was considered closed. 

 

A complaint regarding suspected dump truck for garbage disposal that was not properly covered was received on 1 December 2021.

ET requested the relevant contractors to provide information related to the complaint. Regular site inspections and ad-hoc inspection were conducted in which no item related to the covering of dump trucks was recorded. All contractors were reminded to ensure the proper covering of dump trucks for garbage disposal and avoid potential blowing away of materials during the process. Hence, the case was considered closed. 

 

A complaint regarding muddy water was received on 13 December 2021.

ET requested the relevant contractor to provide information related to the complaint. Regular site inspections and ad-hoc inspections were conducted in which no observation on muddy water was recorded. All contractors were reminded to properly implement water quality mitigation measures on their work sites in accordance with the implementation schedule in the Updated EM&A Manual. Hence, the case was considered closed.

Notification of any summons and status of prosecutions

A contractor reported in October 2021 that they had pleaded guilty in court regarding a dust control emission incident for reclamation works in April 2021. 

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. 71.

1.2          Scope of this Report

This is the 24th 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 October 2021 to 31 December 2021.

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 Leader

Heidi Yu

2828 5704

Independent Environmental Checker (IEC)

(AECOM Asia Company Limited)

Independent Environmental Checker

Jackel Law

3922 9376

 

Deputy Independent Environmental Checker

Roy Man

3922 9141

 

 

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 1451

 

Airfield Works:

Party

Position

Name

Telephone

Contract 3301

North Runway Crossover Taxiway

(FJT-CHEC-ZHEC Joint Venture)

Deputy Project Director

Kin Hang Chung

9800 0048

Environmental Officer

Joe Wong

6182 0351

Contract 3302

Eastern Vehicular Tunnel Advance Works

(China Road and Bridge Corporation)

Project Manager

Dickey Yau

5699 4503

Environmental Officer

Dennis Ho

5645 0563

Contract 3303

Third Runway and Associated Works

(SAPR Joint Venture)

Project Manager

Andrew Keung

6277 6628

Environmental Officer

Max Chin

6447 5707

Contract 3305

Airfield Ground Lighting System

(ADB Safegate Hong Kong Limited)

Project Manager

Allam Al-Turk

2944 9725

Environmental Officer

Calvin Sze

9205 9277

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 3307

Fire Training Facility

(Paul Y. Construction Company Limited)

Project Manager

Chris Wong

6110 1157

Environmental Officer

 

 

Albert Chan

9700 1083

Contract 3308

Foreign Object Debris Detection System

(DAS Aviation Services Group)

Project Manager

Jeffrey Yau

9873 7422

Environmental Officer

Terry Siu

9141 2511

Contract 3310

North Runway Modification Works

Project Manager

Kingsley Chiang

9424 8437

Environmental Officer

Federick Wong

9842 2703

 

Third Runway Concourse:

Party

Position

Name

Telephone

Contract 3402 New Integrated Airport Centres Enabling Works

(Wing Hing Construction Co., Ltd.)

Contract Manager

Michael Kan

9206 0550

Environmental Officer

Lisa He

5374 3418

Contract 3403 New Integrated Airport Centres Building and Civil Works

(Sun Fook Kong Construction Limited)

Project Manager

Alice Leung

9220 3162

Environmental Officer

Ray Cheung

9785 1566

Contract 3404

Integrated Airport Control System

(Shun Hing Systems Integration Co., Ltd.)

Project Manager

Andy Ng

9102 2739

Environmental Officer

Richard Ng

9802 9577

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)

Assistant Project Manager

Qian Zhang

5377 7976

Environmental Officer

Malcolm Leung

7073 7559

 

Terminal 2 (T2) Expansion:

Party

Position

Name

Telephone

Contract 3503 Terminal 2 Foundation and Substructure Works

(Leighton – Chun Wo Joint Venture)

 

 

Project Manager

Eric Wu

3973 1718

Environmental Officer

 

 

 

 

 

Rex Yiu

6465 6861

Contract 3508 Terminal 2 Expansion Works

(Gammon Engineering & Construction Company Limited)

Project Director

Richard Ellis

6201 5637

Environmental Officer

Fanny Law

6184 4650

 

Automated People Mover (APM) and Baggage Handling System (BHS):

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

 

P L Wong

 

 

 

 

9143 2185

Contract 3602 Existing APM System Modification Works

(Niigata Transys Co., Ltd.)

Project Manager

Kunihiro Tatecho

9755 0351

Environmental Officer

Carrie Kwan   

9276 0551

Contract 3603 3RS Baggage Handling System (VISH Consortium)

Project Manager

K C Ho

9272 9626

Environmental Officer

Eric Ha

9215 3432

 

Construction Support (Facilities):

Party

Position

Name

Telephone

Contract 3721 Construction Support Infrastructure Works

(China State Construction Engineering (Hong Kong) Ltd.)

Site Agent

Thomas Lui

9011 5340

Environmental Officer

Gary Yeung

9042 1720

Contract 3722 Western Support Area – Construction Support Facilities

(Tapbo Construction Company Limited and Konwo Modular House Limited Joint Venture)

Deputy Project Director

Philip Kong

9337 8700

Environmental Officer

Eddie Suen

 

6338 8862

Contract 3723

Eastern Support Area – Construction Support Facilities

(Tapbo Construction Company Limited and Konwo Modular House Ltd. Joint Venture.)

Deputy Project Director

Philip Kong

9337 8700

Environmental Officer

Eddie Suen

 

6338 8862

Contract 3728 Minor Site Works

(Shun Yuen Construction Company Limited)

Contract Manager

C K Liu

9194 8739

Environmental Officer

 

 

 

 

 

K F Li

9086 1793

Contract 3733 Emergency Repair Service

(Wing Hing Construction Co., Ltd.)

 

Project Manager

Michael Kan

9206 0550

SHE Manager

Mike Leung

6625 2550  

 

Airport Support Infrastructure:

Party

Position

Name

Telephone

Contract 3801 APM and BHS Tunnels on Existing Airport Island

(China State Construction Engineering (Hong Kong) Ltd.)

Project Manager

Kingsley Chiang

9424 8437

Environmental Officer 

Eunice Kwok

9243 1331

Contract 3802 APM and BHS Tunnels and Related Works

(Gammon Construction Limited)

Project Director

John Adams

6111 6989

Environmental Officer

Phoebe Ng

9869 1105

 

Construction Support (Services / Licences):

Party

Position

Name

Telephone

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)

Senior Project Manager

Gabriel Chan

2435 3260

Environmental Officer

Rex Wong

2695 6319

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 key activities of the Project carried out in the reporting period included reclamation works and land-based works. Works in the reclamation areas included marine filling, seawall and facilities construction, together with runway and associated works such as bored piling for approach lights. Land-based works on existing airport island involved mainly airfield works, foundation and substructure work for Terminal 2 expansion, modification and tunnel work for APM and BHS systems, and preparation work for utilities, with activities include site establishment, site office construction, road and drainage works, cable ducting, demolition of existing facilities, piling, and excavation works.

The locations of the key construction activities are presented in Figure 1.1. Figure 1.2 presents the latest layout of enhanced silt curtain deployed.

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 has been 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 has been 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 has been 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.

On-going for reclamation works. General impact water quality monitoring for water jetting works was completed on 23 May 2017.

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 May 2021, regular DCM monitoring was ceased at all monitoring stations starting from 24 June 2021 and would be resumed if there are marine-based DCM works in the coming future.

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 has been started since June 2021.

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 details of the routine H2S monitoring system will be prepared and submitted to EPD at least one year before commencement of operation of 3RS.

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.

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 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.

On-going

 

 

 

 

 

 

 

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 has been reported in Baseline Monitoring Report and submitted to EPD under EP Condition 3.4.

Impact Monitoring

Weekly

 

On-going

Environmental Auditing

 

Regular site inspection

Weekly

On-going

Marine Mammal Watching Plan (MMWP) implementation measures

Monitor and check

On-going

Dolphin Exclusion Zone (DEZ) Plan implementation measures

Monitor and check

On-going

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

On-going

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, water quality, waste management, landscape & visual, and CWD 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, environmental trainings and regular environmental management meetings were conducted during the reporting period which are summarised as below:

    Six skipper trainings provided by ET; and

    Fifty-four environmental management meetings for EM&A review with works contracts.

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

 

2          Environmental Monitoring and Auditing

2.1          Air Quality Monitoring

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

2.1.1           Action and Limit Levels

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

Table 2.1: Impact Air Quality Monitoring Stations

Monitoring Station

Location

Action Level (mg/m3)

Limit Level (mg/m3)

AR1A

Man Tung Road Park

306

500

AR2

Village House at Tin Sum

298

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

Oct 2021

100%

100%

Nov 2021

100%

100%

Dec 2021

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

Sep 2021

Sunny to Cloudy

Southwest

Oct 2021

Sunny

Southwest

Nov 2021

Sunny to Fine

Northwest

Dec 2021

Sunny to Overcast

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

Oct 2021

100%

100%

100%

100%

Nov 2021

100%

100%

100%

100%

Dec 2021

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

Sep 2021

Sunny to Cloudy

Oct 2021

Sunny to Cloudy

Nov 2021

Sunny to Overcast

Dec 2021

Sunny to Drizzle

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 at NM4 and aircraft noise near NM5 and 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

During the reporting period, water quality monitoring was conducted three days per week, at mid-flood and mid-ebb tides, at a total of 23 water quality monitoring stations, comprising 12 impact (IM) stations, 8 sensitive receiver (SR) stations, and 3 control (C) stations in the vicinity of the water quality sensitive receivers around the existing airport island in accordance with the Manual. The purpose of water quality monitoring at the IM stations is to promptly capture any potential water quality impacts from the Project before the impacts could become apparent at sensitive receivers (represented by the SR stations). Table 2.7 describes the details of the monitoring stations. Figure 2.2 shows the locations of the monitoring stations.

Due to the completion of all marine-based DCM works within May 2021, regular DCM monitoring was ceased at all monitoring stations starting from 24 June 2021 and will be resumed starting from 11 January 2022 in view of the upcoming marine-based DCM works.

Table 2.7: Monitoring Locations and Parameters for Impact Water Quality Monitoring

Monitoring Station

Description

Coordinates

Easting                                 Northing

Parameters

 

 

C1

Control Station

804247

815620

General Parameters

DO, pH, Temperature, Salinity, Turbidity, SS

 

 

C2

Control Station

806945

825682

C3(2)

Control Station

817803

822109

IM1

Impact Station

807132

817949

IM2

Impact Station

806166

818163

IM3

Impact Station

805594

818784

IM4

Impact Station

804607

819725

IM5

Impact Station

804867

820735

IM6

Impact Station

805828

821060

IM7

Impact Station

806835

821349

IM8

Impact Station

808140

821830

IM9

Impact Station

808811

822094

IM10

Impact Station

809794

822385

IM11

Impact Station

811460

822057

IM12

Impact Station

812046

821459

SR1A(1)

Hong Kong-Zhuhai-Macao Bridge Hong Kong Boundary Crossing Facilities (HKBCF) Seawater Intake for cooling

812660

 

819977

General Parameters

DO, pH, Temperature, Salinity, Turbidity, SS

SR2(2)

Planned marine park / hard corals at The Brothers / Tai Mo To

814166

821463

General Parameters

DO, pH, Temperature, Salinity, Turbidity, SS

 

 

SR3

Sha Chau and Lung Kwu Chau Marine Park / fishing and spawning grounds in North Lantau

807571

822147

General Parameters

DO, pH, Temperature, Salinity, Turbidity, SS

 

SR4A

Sha Lo Wan

807810

817189

SR5A

San Tau Beach SSSI

810696

816593

SR6A(3)

Tai Ho Bay, Near Tai Ho Stream SSSI

814739

817963

SR7

Ma Wan Fish Culture Zone (FCZ)

823742

823636

SR8(4)

Seawater Intake for cooling at Hong Kong International Airport (East)

811623

820390

Notes:

(1)     With the operation of HKBCF, water quality monitoring at SR1A station was commenced on 25 October 2018.

(2)     According to the Baseline Water Quality Monitoring Report, C3 station is not adequately representative as a control station of impact/ SR stations during the flood tide. The control reference has been changed from C3 to SR2 from 1 September 2016 onwards.

(3)     As the access to SR6 was obstructed by the construction activities and temporary structures for Tung Chung New Town Extension, the monitoring location has been relocated to SR6A starting from 8 August 2019.

(4)     The monitoring location for SR8 is subject to further changes due to silt curtain arrangements and the progressive relocation of this seawater intake.

2.3.1           Action and Limit Levels

The Action and Limit Levels for general water quality monitoring stipulated in the EM&A programme for triggering the relevant investigation and follow-up procedures under the programme are presented in Table 2.8. The control and IM stations during flood tide and ebb tide for general water quality monitoring are presented in Table 2.9.

Table 2.8: Action and Limit Levels for General Water Quality Monitoring

Parameters

Action Level

Limit Level

Action and Limit Levels for general water quality monitoring

(excluding SR1A & SR8)

DO in mg/l

(Surface, Middle & Bottom)

Surface and Middle

4.5 mg/l

Surface and Middle

4.1 mg/l

5 mg/l for Fish Culture Zone (SR7) only

Bottom

3.4 mg/l

Bottom

2.7 mg/l

SS in mg/l

23

or 120% of upstream control station at the same tide of the same day, whichever is higher

37

or 130% of upstream control station at the same tide of the same day, whichever is higher

Turbidity in NTU

22.6

36.1

Action and Limit Levels SR1A

 

 

 

SS (mg/l)

33

42

Action and Limit Levels SR8

 

 

 

 

SS (mg/l)

52

 

60

 

Notes:

1. For DO measurement, Action or Limit Level is triggered when monitoring result is lower than the limits.

2. For parameters other than DO, Action or Limit Level of water quality results is triggered when monitoring results is higher than the limits.

3. Depth-averaged results are used unless specified otherwise.

4. In view of the construction programme for marine-based DCM works, regular DCM monitoring was ceased since 24 June 2021 and will be resumed starting from 11 January 2022 in view of the upcoming marine-based DCM works.

Table 2.9: The Control and Impact Stations during Flood Tide and Ebb Tide for General Water Quality Monitoring

Control Station

Impact Stations

Flood Tide

 

C1

IM1, IM2, IM3, IM4, IM5, IM6, IM7, IM8, SR3

SR21

IM7, IM8, IM9, IM10, IM11, IM12, SR1A, SR3, SR4A, SR5A, SR6A, SR8

Ebb Tide

 

C1

SR4A, SR5A, SR6A

C2

IM1, IM2, IM3, IM4, IM5, IM6, IM7, IM8, IM9, IM10, IM11, IM12, SR1A, SR2, SR3, SR7, SR8

Note:

1. As per findings of Baseline Water Quality Monitoring Report, the control reference has been changed from C3 to SR2 from 1 Sep 2016 onwards.

2.3.2           Summary of Monitoring Results

The summary or results within their corresponding Action and Limit Levels in the reporting period are presented in Table 2.10. The weather and sea conditions in the last month of the previous quarter and this reporting period were recorded and summarised in Table 2.11.

Table 2.10: Percentage of Water Quality Monitoring Results within Action and Limit Levels

General Water Quality Monitoring

DO

(Surface and Middle)

DO

(Bottom)

SS

Turbidity

Oct 2021

100%

(367/367)

100%

(367/367)

98.5%

(403/409)

100%

(367/367)

Nov 2021

100%

(455/455)

100%

(455/455)

99.8%

(506/507)

100%

(455/455)

Dec 2021

100%

 (455/455)

100%

(455/455)

99.8%

(506/507)

100%

(455/455)

Overall

100%

100%

99.4%

100%

Note:

(1) The percentages are calculated by dividing the number of depth-averaged results complying with their corresponding Action and Limit Levels by the total number of depth-averaged results.

(2) The number in the bracket under the percentage represents the total number of depth-averaged results complying with their corresponding Action and Limit Levels over the total number of depth-averaged results.

Table 2.11: General Weather Condition and Sea Condition during Impact Water Quality Monitoring

 

Weather

Sea Condition

Sep 2021

Sunny to Rainy

Calm to Rough

Oct 2021

Sunny to Rainy

Calm to Rough

Nov 2021

Sunny to Cloudy

Calm to Rough

Dec 2021

Sunny to Rainy

Calm to Rough

The monitoring results for all parameters, except suspended solid (SS), obtained during the reporting period were within their corresponding Action and Limit Levels stipulated in the EM&A programme. The detailed monitoring results are presented in Appendix C. Relevant investigation and follow-up actions will be conducted according to the EM&A programme if the corresponding Action and Limit Levels are triggered.

For SS, some of the testing results triggered the corresponding Action Levels in the reporting period, and investigations were conducted accordingly. Summaries of results triggering Action Levels for SS are presented in Table 2.12 to Table 2.13.

Details of the investigation findings were presented in Construction Phase Monthly EM&A Report Nos. 70, 71 and 72, which concluded that all results triggering the Action Levels were not related to the Project.

Table 2.12: Summary of SS Compliance Status (Mid-Ebb Tide)

IM1

IM2

IM3

IM4

IM5

IM6

IM7

IM8

IM9

IM10

IM11

IM12

SR1A

SR2

SR3

SR4A

SR5A

SR6A

SR7

SR8

23/10/2021

 

 

D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11/11/2021

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No. of result triggering Action or Limit Level

0

0

1

0

0

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

 

Table 2.13: Summary of SS Compliance Status (Mid-Flood Tide)

IM1

IM2

IM3

IM4

IM5

IM6

IM7

IM8

IM9

IM10

IM11

IM12

SR1A

SR3

SR4A

SR5A

SR6A

SR7

SR8

07/10/2021

 

 

 

 

 

 

 

D

 

 

 

 

 

 

 

 

 

 

 

23/10/2021

 

 

 

 

D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

23/12/2021

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No. of result triggering Action or Limit Level

0

1

1

1

1

0

0

1

0

0

0

0

0

0

1

0

0

0

0

Note: The monitoring results compiled with their corresponding Action or Limit Levels are presented in Appendix C.

Legend:

 

Result within corresponding Action and Limit Levels

 

Result triggered the Action Level at monitoring station located upstream of the Project based on dominant tidal flow

D

Result triggered the Action Level at monitoring station located downstream of the Project based on dominant tidal flow

 

Upstream station with respect to the Project during the respective tide based on dominant tidal flow

 

Downstream station with respect to the Project during the respective tide based on dominant tidal flow

2.3.3           Conclusion

During the reporting period, it is noted that most of the monitoring results were within their corresponding Action and Limit Levels, while some results triggered the corresponding Action Levels, and investigations were conducted accordingly. Based on the findings presented in Construction Phase Monthly EM&A Report Nos. 70, 71 and 72, the cases that triggered the corresponding Action Levels were not related to the Project. Hence, the Project did not introduce adverse impact to all water quality sensitive receivers. All required actions under the Event and Action Plan were followed.

Nevertheless, the non-project related trigger was attended to and initiated corresponding action and measures. As part of the EM&A programme, the construction methods and mitigation measures for water quality will continue to be monitored and opportunities for further enhancement will continue to be explored and implemented where possible, to strive for better protection of water quality and the marine environment.

In the meantime, the contractors were reminded to implement and maintain all mitigation measures during weekly site inspections and regular environmental management meetings. These include maintaining mitigation measures properly for reclamation works including marine filling and seawall construction as recommended in the Manual.

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 2.14.

Table 2.14: 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 had taken actions to implement the recommended measures. Waste management audits were carried out by ET according to the requirement 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 2.15. Proactive measures have been undertaken during the re-configuration of T2 building. The contractor has 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 contractor, and ET and IEC have carried out site visits to recyclers’ facilities to review recycling process. Dedicated areas for sorting of materials are established on site. Recyclable materials such as steel, reinforcement bar, structural steel, aluminium, copper, other metals and glass are sorted on-site and transported off-site for recycling. ET and IEC have carried out site audits regularly and reviewed the trip ticket system.  

Table 2.15: Construction Waste Statistics 

 

C&D(1) Material Stockpiled for Reuse or Recycle

(m3)

C&D Material Reused in the Project (m3)

C&D Material Reused in other Projects (m3)

C&D Material Transferred to Public Fill(3)

(m3)

Chemical Waste

(kg)

Chemical Waste

(l)

General Refuse (tonne)

Oct 2021(2)

8,018

20,471

24,211

3,896

30

3,400

1,744

Nov 2021(2)

16,540

6,051

7,039

5,493

0

1,400

2,631

Dec 2021(2)

4,842

15,538 

1,251

10,204

600

2,742

2.764

Total

29,400

42,060

32,501

19,593

630

7,542

7,139

Notes:

1.       C&D refers to Construction and Demolition.

2.       Paper, metals and/or plastics were recycled in the reporting period.

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

There were no complaints, non-compliance of the WMP, contract-specific WMPs, statutory and contractual requirements that triggered Action and Limit Levels in the 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 of the Project. The sampling process, 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.

Sampling works for marine sediment generated from the reclaimed land area was on-going during the reporting period. The details of the marine sediment sampling, treatment and backfilling will be reported in the subsequent EM&A Reports upon completion.

2.5          Chinese White Dolphin Monitoring

CWD monitoring was conducted by vessel line transect survey at a frequency of two full surveys per month, supplemented by land-based theodolite tracking survey and PAM. The frequency of the land-based theodolite tracking survey during the construction phase was one day per month at both Sha Chau (SC) and Lung Kwu Chau (LKC) stations, as stipulated in the Manual. 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 conducted from October to December 2021 are shown in Figure 2.3, whilst the land-based theodolite tracking survey stations are described in Table 2.16 and depicted in Figure 2.4. The location of the PAM device is shown in Figure 2.10.

Table 2.16: Land-based Theodolite Tracking Survey Station Details

Stations

Location

Geographical Coordinates

Station Height (m)

Approximate Tracking Distance (km)

D

Sha Chau (SC)

22° 20’ 43.5” N

113° 53’ 24.66” E

45.66

2

E

Lung Kwu Chau (LKC)

22° 22’ 44.83” N

113° 53’ 0.2” E

70.40

3

2.5.1           Action and Limit Levels

The Action Level and Limit Level for CWD monitoring were formulated by an action response approach using the running quarterly dolphin encounter rates (STG and ANI) derived from baseline monitoring data, as presented in the CWD Baseline Monitoring Report. The derived values of Action and Limit Levels for CWD monitoring are shown in Table 2.17.

Table 2.17: Derived Values of Action Level and Limit Level for Chinese White Dolphin Monitoring 

 

NEL, NWL, AW, WL and SWL as a Whole

Action Level

Running quarterly STG < 1.86 & ANI < 9.35

Limit Level

Two consecutive running quarterly (3-month) STG < 1.86 & ANI < 9.35

2.5.2           Summary of Monitoring Results

2.5.2.1              Vessel Line Transect Survey

Survey Effort

During the October to December 2021 reporting period, 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 1,357 km of survey effort was collected from these surveys, with around 80.9% 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 October to December 2021, there were a total of 29 sightings of CWD, with 91 dolphins sighted (Table 2.18). Amongst these sightings, 27 sightings with 89 dolphins were recorded during on-effort searches under favourable weather condition.

When breaking down the sightings by survey areas, one sighting with one dolphin, 22 sightings with 70 dolphins and 6 sightings with 20 dolphins were recorded in NWL, WL and SWL respectively during the current reporting period. No CWD was sighted on AW transect nor in NEL survey area.

Compared with the last quarter (i.e. July to September 2021), both the total number of CWD sightings and total number of the dolphins decreased by 43% and 45% respectively. The most noticeable decrease was reflected from the NWL survey area.

Compared with the same quarter of last year (i.e. October to December 2020), there were decreases in both the total number of sightings and the total number of dolphins by 36% and 34% respectively. Such decreases were recorded throughout the three survey areas.

Table 2.18 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 2.18: 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

Previous Reporting Period

Current Reporting Period

 

October to December 2020

July to September 2021

October to December 2021

NEL

0 (0) 

0 (0)

0 (0)

NWL

2 (2) 

9 (20)

1 (1)

AW

2 (4) 

0 (0)

0 (0)

WL

27 (88) 

29 (105)

22 (70)

SWL

14 (43) 

13 (39)

6 (20)

Total

45 (137) 

51 (164)

29 (91)

Note: Values in ( ) represent number of dolphins

The distribution of CWD sightings recorded from October to December 2021 is illustrated in Figure 2.5. In NWL, there was only one CWD sighting recorded near Lung Kwu Chau. In WL, CWD sightings were scattered amongst the survey area from Tai O to Peaked Hill. In SWL, CWD sightings were scattered in the waters around Fan Lau and in the central part of the survey area.  No CWD sightings were recorded in NEL survey area during the reporting period. Details of the sighting data are presented in Appendix C.

Figure 2.5: Sightings Distribution of Chinese White Dolphins from October to December 2021

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.

 

Encounter Rate

The dolphin encounter rates for the number of on-effort dolphin sightings per 100 km survey effort (STG) and for the total on-effort number of dolphins per 100 km survey effort (ANI) in the whole survey area (i.e. NEL, NWL, AW, WL and SWL) for October, November and December 2021 are summarised in Table 2.19.

In this reporting period, both the running quarterly STG and ANI increased from October to November 2021 but followed by a drop in December 2021. This is mainly resulted from the drops for the monthly STG and ANI from October to December 2021 (STG: from 3.71 to 1.59; ANI: from 11.42 to 4.51). No Action Level for CWD monitoring was triggered during the reporting period.

Compared with the previous reporting period (i.e. July to September 2021), both the running quarterly STG and ANI decreased from September 2021 to December 2021 (STG: from 3.84 to 2.46; ANI from 12.38 to 8.11). While comparing with the same quarter of last year (i.e. October to December 2020), both the running quarterly STG and ANI decreased, from 3.71 to 2.46 and from 11.64 to 8.11 respectively. Encounter rates for these periods are summarised in Table 2.19 and graphical presentation is provided in Appendix C

Table 2.19: Summary of Monthly and Running Quarterly STG and ANI of Chinese White Dolphin for the Same Quarter Last Year, Previous Quarter, and Current Reporting Period

 

Same Quarter of Last Year

Previous Reporting Period

Current Reporting Period

 

Oct 20

Nov 20

Dec 20

Jul 21

Aug 21

Sep 21

Oct 21

Nov 21

Dec 21

Monthly STG

3.89

3.30

3.99

6.84

1.32

3.55

3.71

2.16

1.59

Monthly ANI

17.80

10.37

7.19

21.22

4.19

12.29

11.42

8.63

4.51

Running Quarterly STG

2.24

2.73

3.71

4.39

3.69

3.84

2.77

3.15

2.46

Running Quarterly ANI

9.54

10.52

11.64

12.98

11.32

12.38

9.05

10.84

8.11

Note:    For detailed calculations of encounter rates STG and ANI for the current reporting period, please refer to the Construction Phase Monthly EM&A Report Nos. 70, 71, and 72.

Group Size

Between October and December 2021, the group size of CWD sightings ranged from 1 to 13 dolphins. The average group size of CWD was 3.14 dolphins per group, which is slightly smaller than that of the last quarter (3.22 dolphins per group). The average group size of CWD in this reporting quarter is slightly larger than that of the same quarter of last year (3.0 dolphins per group).

In this reporting quarter, the numbers of CWD sightings with small group size (i.e. 1-2 dolphins) and medium group size (i.e. 3-9 dolphins) were similar. There are no observable differences in the distribution pattern between small-sized and medium-sized dolphin groups in WL and SWL as they all scattered amongst survey areas. In NWL, there was only one small-sized dolphin group recorded near Lung Kwu Chau during the current reporting period.

One CWD sighting with large group size (i.e. 10 or more dolphins) was recorded in this reporting period, which was encountered in WL survey area near the offshore waters between Yi O and Peaked Hill. Sighting locations of CWD groups with different group sizes are depicted in Figure 2.6.

Figure 2.6: 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 October to December 2021, 14 sightings of CWD were recorded with feeding activities. Amongst them, two sightings were observed associated with operating shrimp trawler in WL and gillnetter in SWL survey area.

The number of sightings with feeding recorded in the current reporting period is same as that in the previous reporting period (i.e. 14 sightings involved feeding activities between July and September 2021). The number of CWD sightings with feeding activities in this reporting period is much higher than that in the same quarter of last year (i.e. 4 sightings between October to December 2020).

The sighting locations of CWDs engaged in different behaviours during the current reporting period are illustrated in Figure 2.7.

Figure 2.7: Sighting Locations of Chinese White Dolphins Engaged in Different Behaviours

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


Mother-calf Pairs

From October to December 2021, six sightings of CWD were recorded with the presence of mother-and-unspotted juvenile pairs and/or mother-and-unspotted calf pairs observed, which is similar to that recorded in the previous reporting quarter (i.e. seven sightings between July and September 2021) as well as that recorded in the same quarter of last year (i.e. seven sightings between October to December 2020). These six sightings were recorded in WL and SWL.

The locations of CWD sightings with the presence of mother-calf pairs are shown in Figure 2.8.

Figure 2.8: Sighting Locations of Mother-calf Pairs

Remarks: (1) Please note that there are six circles on the map indicating the sighting locations of Mother-Calf pair. (2) Marine park excludes land area and the landward boundary generally follows the high water mark along the coastline.

Photo Identification

Between October and December 2021, a total number of 31 different CWD individuals were identified altogether for 46 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 31 different CWD individuals, eight animals (i.e. SLMM003, SLMM012, SLMM014, SLMM025, SLMM037, WLMM043, WLMM071 and WLMM079) were sighted for more than once.

Five individuals including SLMM003, SLMM012, SLMM025, SLMM037 and WLMM079 were re-sighted in different survey areas (i.e. WL and SWL) during this reporting period. The most frequently re-sighted individuals in this reporting quarter are SLMM003, SLMM037 and WLMM043 that each of them has been encountered four times. The number of CWD individuals re-sighted more than once and the number of CWD individuals showing cross-area movement in the current reporting period are both lower than those of the previous reporting quarter from July to September 2021 (26 and 14 individuals respectively).

A summary of photo identification works is presented in Table 2.20. Representative photos of the 31 identified individuals and figures depicting the sighting locations of the aforementioned eight re-sighted individuals recorded in this reporting period are presented in Appendix C.

Table 2.20: Summary of Photo Identification

Individual ID

Date of sighting

Sighting Group No.

Area

 

Individual
ID

Date of sighting

Sighting Group No.

Area

NLMM016

07-Dec-21

1

NWL

 

SLMM058

04-Nov-21

2

WL

NLMM081

06-Oct-21

4

WL

 

SLMM066

04-Nov-21

4

WL

SLMM003

06-Oct-21

6

WL

 

WLMM001

11-Nov-21

1

SWL

 

04-Nov-21

3

WL

 

WLMM003

04-Nov-21

1

WL

 

11-Nov-21

1

SWL

 

WLMM007

06-Oct-21

4

WL

 

06-Dec-21

2

SWL

 

WLMM040

06-Dec-21

2

SWL

SLMM007

06-Oct-21

4

WL

 

WLMM043

06-Oct-21

1

WL

SLMM010

04-Nov-21

3

WL

 

 

03-Nov-21

1

WL

SLMM012

04-Nov-21

5

WL

 

 

04-Nov-21

1

WL

 

16-Dec-21

1

SWL

 

 

15-Dec-21

1

WL

SLMM014

11-Nov-21

1

SWL

 

WLMM062

06-Oct-21

4

WL

 

16-Dec-21

1

SWL

 

WLMM068

15-Dec-21

1

WL

SLMM025

06-Oct-21

4

WL

 

WLMM071

06-Oct-21

2

WL

 

16-Dec-21

1

SWL

 

 

04-Nov-21

2

WL

SLMM027

04-Nov-21

5

WL

 

WLMM079

06-Oct-21

6

WL

SLMM030

19-Oct-21

2

WL

 

 

04-Nov-21

3

WL

SLMM031

27-Oct-21

3

SWL

 

 

11-Nov-21

1

SWL

SLMM037

06-Oct-21

6

WL

 

WLMM114

04-Nov-21

3

WL

 

04-Nov-21

3

WL

 

WLMM131

11-Nov-21

1

SWL

 

 

5

WL

 

WLMM149

04-Nov-21

2

WL

 

06-Dec-21

2

SWL

 

WLMM168

06-Oct-21

2

WL

SLMM049

06-Oct-21

4

WL

 

WLMM169

06-Oct-21

4

WL

SLMM052

06-Oct-21

4

WL

 

WLMM170

06-Oct-21

4

WL

 

2.5.2.2              Land-based Theodolite Tracking Survey

Survey Effort

Between October and December 2021, a total of six days of land-based theodolite tracking survey effort were completed, including three days on Lung Kwu Chau and three days on Sha Chau. In total, eight CWD groups were tracked from the Lung Kwu Chau station while no CWD groups were tracked from the Sha Chau station, with an overall 0.22 CWD groups sighted per survey hour.

Information on survey effort and CWD groups sighted during land-based theodolite tracking surveys are presented in Table 2.21. Details on the survey effort and CWD groups tracked are presented in Appendix C. The first sighting locations of CWD groups tracked between October and December 2021 are shown in Figure 2.9.

Table 2.21: Summary of Survey Effort and CWD Group of Land-based Theodolite Tracking Survey

Land-based Station

# of Survey Sessions

Survey Effort (hh:mm)

# CWD Groups Sighted

CWD Group Sighting per Survey Hour

October 2021

Lung Kwu Chau

1

06:00

3

0.5

Sha Chau

1

06:00

0

0

TOTAL

2

12:00

3

0.25

November 2021

Lung Kwu Chau

1

06:00

2

0.33

Sha Chau

1

06:00

0

0

TOTAL

2

12:00

2

0.17

December 2021

Lung Kwu Chau

1

06:00

3

0.5

Sha Chau

1

06:00

0

0

TOTAL

2

12:00

3

0.25

OVERALL

6

36:00

8

0.22

Figure 2.9:       Plots of First Sightings of All CWD Groups from Land-based Stations

Remark: Marine park excludes land area and the landward boundary generally follows the high water mark along the coastline.

2.5.2.3              Progress Update on PAM

PAM device has been deployed and positioned to the south of Sha Chau island inside the SCLKCMP (Figure 2.10), supplement the detection of CWD presence in the south Sha Chau area that are not recorded visually by the land-based theodolite tracking survey and to coincide the theodolite data when there is sighting from the land-based station at Sha Chau. Both C-POD and F-POD are considered as effective PAM devices in detecting CWD occurrence, and F-POD was the main PAM device deployed where feasible. In this reporting period, the F-POD has been retrieved on 11 October 2021 for data collection and was subsequently re-deployed. As the period of data collection and analysis takes more than four months, PAM results could not be reported in quarterly intervals but report for supplementing the annual CWD monitoring analysis.

2.5.2.4              Site Audit for CWD-related Mitigation Measures

During the reporting period, silt curtains were in place by the contractors for marine filling works and bored piling, in which dolphin observers were deployed by each contractor in accordance with the Marine Mammal Watching Plan (MMWP). Teams of at least two dolphin observers were deployed at 1 to 5 dolphin observation stations by the contractors for continuous monitoring of the DEZ for seawall construction (ongoing) and bored piling works (up to October 2021) in accordance with the DEZ Plan. Trainings for the proposed dolphin observers on the implementation of MMWP and DEZ monitoring were provided by the ET prior to the aforementioned works, with a cumulative total of 704 individuals being trained and the training records were kept by the ET. From the contractors’ MMWP observation records and DEZ monitoring records, no dolphin or other marine mammals were observed within or around the silt curtains or the DEZ in this reporting period. The contractors’ records were also audited by the ET during site inspection.

Audits of acoustic decoupling for construction vessels were carried out during weekly site inspection and summarised in Section 2.7. Summary of audits of SkyPier HSFs route diversion and speed control and construction vessel management are presented in Section 2.8 and Section 2.9 respectively.

2.6          Sewage Flow Monitoring

In accordance with the approved EIA Report (AEIAR-185/2014) for Expansion of Hong Kong International Airport into a Three-Runway System (3RS), the gravity sewer from the airport discharge manhole to TCSPS was recommended to be upgraded by AAHK to cater for the ultimate design sewage flow from the expanded airport. It was recommended in section 6.2.1.1 of the Manual that AAHK should conduct annual monitoring for the sewage flow build-up of the gravity sewer from the airport discharge manhole to TCSPS one year before the scheduled commencement of operation of the proposed third runway. The annual monitoring results shall inform the timing of commencement of the planning of the sewer upgrading works. The sewage flow monitoring methodology paper (the Paper) was prepared, submitted and subsequently approved by EPD on 21 June 2021.

2.6.1           Brief Summary of the Agreed Method

With reference to the Paper, the existing sewer to be monitored is the section between FMH7042035 (reference point A) and FMH7043286 (reference point C). A schematic diagram of the sewage system between reference point A and C is presented in Figure 2.11. The locations of these reference points are presented in Figure 2.12. To determine if the threshold of 80% of the design capacity is being reached, an approach using the Colebrook-White equation was used.

Two pipe segments between reference points A and C were identified with the lowest flow capacity and therefore selected as the benchmark for comparing the actual sewage flow of the sewers for the flow monitoring:

     Segment 1: for sewage pipelines serving the airport – the critical segment is the 1050mm sewer between manholes FMH7042032 and FMH7042033, where the 80% threshold of full flow capacity is 53,395.2 m3/day; and

     Segment 2: for the sewage pipelines serving the airport and catchment L4 – the critical segment is the 1050mm sewer between manholes FMH7043288 and FMH7043287, where the of 80% threshold of full flow capacity is 57,628.8 m3/day.

According to the Paper, segment 1 would reach its 80% full flow capacity before segment 2. Hence, segment 1 was considered the critical segment within the section between reference points A and C, and it was agreed to conduct sewage flow monitoring for segment 1 only. With the daily flow rate of SPS-1, which collects sewage arising from the Airport, is available from AAHK, desk-based flow monitoring would be conducted by comparing the daily average flow rate of SPS-1 (i.e. Q1) against the threshold of 80% of pipe capacity of segment 1 (i.e. 53,395.2 m3/day) in accordance with the following criteria:

      If Q1 53,395.2 m3/day, planning of sewerage upgrading works can be on hold until results of next annual monitoring; and

      If Q1 > 53,395.2 m3/day, planning of sewerage upgrading works shall be considered to start and annual monitoring shall be discontinued.

Within the monitoring period, if the daily average flow rate of SPS-1 (i.e. Q1) is higher than the threshold of 53,395.2 m3/day, planning of sewerage upgrading works shall be considered to start and the annual monitoring shall be discontinued. The above approach was agreed to be adopted as part of annual monitoring for the sewage flow increment of the concerned gravity sewer in 2021 and 2022.

2.6.2           Desk-Based Monitoring Result

To fulfil the requirements as mentioned in previous section, the annual sewage flow monitoring has been started since June 2021. According to the daily flow monitoring record of SPS-1 from October to December 2021 (see Appendix C), the daily average flow of 16,319 m3/day for October 2021, 15,717 m3/day for November 2021 and 14,866 m3/day for December 2021 were well below the above-mentioned threshold of 53,395.2 m3/day. For the subsequent sets of sewage flow monitoring data for SPS-1, it will be presented in upcoming Quarterly and Annual EM&A Reports.

2.7          Environmental Site Inspection

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

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

·        The EIA and EM&A requirements;

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

·        The EP conditions and other submissions under the EP;

·        Monitoring results of EM&A programme;

·        Works progress and programme;

·        Proposal of individual works;

·        Contract specifications on environmental protection; and

·        Previous site inspection results.

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

1.      Sandbags and water-filled barriers were placed at site boundary to prevent muddy water discharge to nearby swale.

2.      Earth bund as speed cushion was set up at haul road to reduce vehicle speed and minimise the generation of fugitive dust.

3.      Environmental training was provided to workers for proper waste management and chemical waste handling procedures.

Use of sandbags and water-filled barriers for muddy water discharge prevention

Use of earth bund as speed cushion for dust suppression purpose

Provision of environmental training for site personnel

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.

2.7.1           Landscape and Visual Mitigation Measures

Implementation of applicable landscape and visual mitigation measures (reference to the environmental protection measures CM1 – CM10 in Appendix B) is monitored regularly in accordance with the Manual. The implementation status of the environmental protection measures is summarised in Table 2.22. For trees which were managed under the Project during the reporting period, relevant measures have been implemented by Contracts 3302, 3503, 3508, 3602 and 3801. Contract 3802 would begin to undertake tree management measures subject to the handover of site area. Those trees which were within the Project boundary yet to be taken care by existing 3RS Contractors during the reporting period were managed by AAHK. The total number of retained trees, transplanted trees and to-be-transplanted trees under the management of Project are summarized in Table 2.23.

The total number of retained trees of the Project as of December 2021 was 52. Compared to 89 retained trees reported in the previous reporting period, the change in number was due to the following reasons:

·        Some trees near Airport North Interchange under Contract 3508 were removed due to safety concern of Airport Express Line (AEL) operation (-4 nos);

·        A storage area with some trees were handed over from Contract 3801 to AAHK.  The trees were excluded from the Project (-28 nos); and

·        Works areas with trees were handed over from Contract 3503 to Contract 3508, of which part of the trees would be felled by Contract 3508 as planned (-5 nos).

Table 2.24 lists the affected tree ID together with the reasons for change of retained tree status of the Project. The summary of transplanted trees is shown in Table 2.25. Photos of the transplanted trees are presented in Table 2.26.

Table 2.22: 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.

3RS Project 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 have been 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.

3302, 3503, 3508, 3602, 3801

 

3802

(To be implemented)

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 have been 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.  

3503, 3508 3801

 

3802

(To be implemented)

CM 10 – Land formation works shall be followed with advanced hydroseeding around taxiways and runways as soon as practical

To be implemented around taxiways and runways as soon as practicable.

To be implemented

Table 2.23: Summary of the Number of Retained, Transplanted and To-be-transplanted Trees in the Reporting Period

Existing

 

 

 

Contract

Retain (nos.)

Transplanted (nos.)

To-be-transplanted (nos.)

Establishment Period

Maintenance Period

3302

9

0

0

0

3503

0

6

3

0

3508(1)

24

12

0

0

3602

2

0

0

0

3801

17

0

   5 (2)

0

Sub-total

52

18

8

0

Provisional

 

 

 

Contract

Retain (nos.)

Transplanted (nos.)

To-be-transplanted (nos.)

3508(1)

51

0

10

Sub-total

51

0

10

Grand Total

103

26

10

 Note:

(1)     As some of the site areas have been handed over to Contract 3508, existing trees to be managed by Contract 3508 is subject to change after initial tree surveys for each batch of handed over site areas have been conducted by the Contractor.

(2)     Three transplanted trees (CT1194, CT1794 and CT1795) were subsequently fell after transplantation. Please refer to Table 2.25 for details.

Table 2.24: Summary of the Tree Status Updated in the Reporting Period

Tree ID(s)