Expansion of Hong Kong
International Airport into a Three-Runway System

Construction Phase Quarterly EM&A Report No.18 (1 April to 30 June 2020)

September 2020

 

 

 

355482

06/15/13

A

 

 

 

 

Mott MacDonald

 

 

 

 

 

 

Contents

Abbreviations

Executive Summary

1       Introduction

1.1     Background

1.2     Scope of this Report

1.3     Project Organisation

1.4     Contact information for the Project

1.5     Summary of Construction Works

1.6     Summary of EM&A Programme Requirements

2       Environmental Monitoring and Auditing

2.1     Air Quality Monitoring

2.1.1       Action and Limit Levels

2.1.2       Summary of Monitoring Results

2.1.3       Conclusion

2.2     Noise Monitoring

2.2.1       Action and Limit Levels

2.2.2       Summary of Monitoring Results

2.2.3       Conclusion

2.3     Water Quality Monitoring

2.3.1       Action and Limit Levels

2.3.2       Summary of Monitoring Results

2.3.3       Conclusion

2.4     Waste Monitoring

2.4.1       Action and Limit Levels

2.4.2       Summary of Monitoring Results

2.5     Chinese White Dolphin Monitoring

2.5.1       Action and Limit Levels

2.5.2       Summary of Monitoring Results

2.6     Environmental Site Inspection

2.6.1       Landscape and Visual Mitigation Measures

2.6.2       Land Contamination Assessment

2.7     Audit of SkyPier High Speed Ferries

2.8     Audit of Construction and Associated Vessels

2.9     Review of the Key Assumptions Adopted in the EIA Report

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

3.1     Compliance with Other Statutory Environmental Requirements

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

3.2.1       Complaints

3.2.2       Notifications of Summons or Status of Prosecution

3.3     Cumulative Statistics

4       Conclusion and Recommendation

 

Tables

Table 1.1: Contact Information of Key Personnel 7

Table 1.2: Contact Information of the Project 10

Table 1.3: Summary of Status for All Environmental Aspects under the Updated EM&A Manual 10

Table 2.1: Impact Air Quality Monitoring Stations  14

Table 2.2: Percentage of Air Quality Monitoring Results within Action and Limit Levels  14

Table 2.3: General Meteorological Condition during Impact Air Quality Monitoring  14

Table 2.4: Impact Noise Monitoring Stations  15

Table 2.5: Percentage of Noise Monitoring Results within Action and Limit Levels  15

Table 2.6: General Meteorological Condition during Impact Noise Monitoring  16

Table 2.7: Monitoring Locations and Parameters for Impact Water Quality Monitoring  16

Table 2.8: Action and Limit Levels for General Water Quality Monitoring and Regular DCM Monitoring  17

Table 2.9: The Control and Impact Stations during Flood Tide and Ebb Tide for General Water Quality Monitoring and Regular DCM Monitoring  18

Table 2.10 : Percentage of Water Quality Monitoring Results within Action and Limit Levels  19

Table 2.11: General Weather Condition and Sea Condition during Impact Water Quality Monitoring  19

Table 2.12: Summary of DO (Surface and Middle) Results triggering Action or Limit Level (Mid-Ebb Tide) 19

Table 2.13: Summary of DO (Bottom) Results triggering Action or Limit Level (Mid-Ebb Tide) 20

Table 2.14: Summary of DO (Surface and Middle) Results triggering Action or Limit Level (Mid-Flood Tide) 20

Table 2.15: Summary of DO (Bottom) Results triggering Action or Limit Level (Mid-Flood Tide) 20

Table 2.16: Summary of SS Results triggering Action or Limit Level (Mid-Flood Tide) 20

Table 2.17: Action and Limit Levels for Construction Waste  21

Table 2.18: Construction Waste Statistics  22

Table 2.19: Land-based Theodolite Tracking Survey Station Details  22

Table 2.20: Derived Values of Action Level and Limit Level for Chinese White Dolphin Monitoring  23

Table 2.21: Summary of Number of CWD Sightings and Number of Dolphins for the Same Quarter Last Year, Previous Quarter, and Current Reporting Period  24

Table 2.22: 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  26

Table 2.23: Summary of Photo Identification  30

Table 2.24: Summary of Survey Effort and CWD Group of Land-based Theodolite Tracking Survey  31

Table 3.1: Statistics for Valid Exceedances for the Environmental Monitoring  37

Table 3.2: Statistics for Non-compliance, Complaints, Notifications of Summons and Prosecution  38

 

 

 

 

 

 

 

 

 

Figures

Figure 1.1

Locations of Key Construction Activities

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

 

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

CAP

Contamination Assessment Plan

CAR

Contamination Assessment Report

CWD

Chinese White Dolphin

DCM

Deep Cement Mixing

DEZ

Dolphin Exclusion Zone

DO

Dissolved Oxygen

EAR

Ecological Acoustic Recorder

EIA

Environmental Impact Assessment

EM&A

Environmental Monitoring & Audit

EMIS

Environmental Mitigation Implementation Schedule

EP

Environmental Permit

EPD

Environmental Protection Department

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

MTCC

Marine Traffic Control Centre

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

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 18th Construction Phase Quarterly EM&A Report for the Project which summarises the monitoring results and audit findings of the EM&A programme during the reporting period from 1 April 2020 to 30 June 2020.  

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 deep cement mixing (DCM) works, marine filling, seawall and facilities construction, together with runway and associated works. 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

56

Water quality monitoring

39

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.

 

Snapshots of Good Environmental Practices in the Reporting Period

Reuse of inert C&D materials as filling materials for the marine reclamation

Reuse of rubble and asphalt generated from demolition for paving haul roads

Seawall blocks with eco-enhancement designs along the artificial vertical seawall

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

1.     About 14,000 tonnes of inert C&D materials arising from the Horizontal Directional Drilling (HDD) works were reused as filling materials for the marine reclamation.

2.     Rubble and asphalt collected from demolition were reused for paving haul roads of the construction area to reduce generation of fugitive dust during the movements of vehicle.

3.     As part of the marine ecological and fisheries enhancement strategies, seawall blocks with eco-enhancement designs along the artificial vertical seawall has been installed to facilitate and promote colonisation of intertidal and sub-tidal fauna in the future.

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 dissolved oxygen (DO) and 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 DO and SS, some testing results triggered the relevant Action or Limit Level, and the corresponding investigations were conducted accordingly. The investigation findings concluded that the case was 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 is 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

 

No construction activities-related complaint was received

Nil

Notification of any summons and status of prosecutions

 

No notification of summons or prosecution were received.

Nil

Changes that affect the EM&A

 

There was no change to the construction works that may affect the EM&A.  

Nil

Remarks:

^Only triggering of Action or Limit Level found related to Project works is counted as Breach of Action or Limit Level.

 

1        Introduction

1.1      Background

On 7 November 2014, the Environmental Impact Assessment (EIA) Report (Register No.: AEIAR-185/2014) for the “Expansion of Hong Kong International Airport into a Three-Runway System” (the Project) was approved and an Environmental Permit (EP) (Permit No.: EP-489/2014) was issued for the construction and operation of the Project.

Airport Authority Hong Kong (AAHK) commissioned Mott MacDonald Hong Kong Limited (MMHK) to undertake the role of Environmental Team (ET) for carrying out the Environmental Monitoring & Audit (EM&A) works during the construction phase of the Project in accordance with the Updated EM&A Manual (the Manual) submitted under EP Condition 3.1[1]. AECOM Asia Company Limited (AECOM) was employed by AAHK as the Independent Environmental Checker (IEC) for the Project.

The Project covers the expansion of the existing airport into a three-runway system (3RS) with key project components comprising land formation of about 650 ha and all associated facilities and infrastructure including taxiways, aprons, aircraft stands, a passenger concourse, an expanded Terminal 2, all related airside and landside works and associated ancillary and supporting facilities. The submarine aviation fuel pipelines and submarine power cables also require diversion as part of the works.

Construction of the Project is to proceed in the general order of diversion of the submarine aviation fuel pipelines, diversion of the submarine power cables, land formation, and construction of infrastructure, followed by construction of superstructures.

The updated overall phasing programme of all construction works was presented in Appendix A of the Construction Phase Monthly EM&A Report No. 7 and the contract information was presented in Appendix A of the Construction Phase Monthly EM&A Report No. 54.

1.2      Scope of this Report

This is the 18th Construction Phase Quarterly EM&A Report for the Project which summarises the key findings of the EM&A programme during the reporting period from 1 April 2020 to 30 June 2020.

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, Environment

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

Deputy Environmental Team Leader

Daniel Sum

2585 8495

Independent Environmental Checker (IEC)

(AECOM Asia Company Limited)

Independent Environmental Checker

Jackel Law

3922 9376

 

Deputy Independent Environmental Checker

Roy Man

3922 9141

 

 

Advanced Works:

Party

Position

Name

Telephone

Contract P560(R) Aviation Fuel Pipeline Diversion Works

(Langfang Huayuan Mechanical and Electrical Engineering Co., Ltd.)

Project Manager

 

Wei Shih

 

2117 0566

 

Environmental Officer

Lyn Liu

 

5172 6543

 

 

Reclamation Works:

Party

Position

Name

Telephone

Contract 3205 DCM (Package 5)

(Bachy Soletanche - Sambo Joint Venture)

Deputy Project Director

Min Park

9683 0765

Environmental Officer

William Chan

5408 3045

Contract 3206

Main Reclamation Works (ZHEC-CCCC-CDC Joint Venture)

Project Manager

Alan Mong

3763 1352 

 

Environmental Officer

Kwai Fung Wong

3763 1452

 

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 3307 Fire Training Facility

(Paul Y. Construction Company Limited)

Project Manager

Steven Meredith

6109 1813

Environmental Officer

Albert Chan

9700 1083

 

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

Alpha Chia

9626 1114

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

Cecilia Choi

9265 9352

 

Terminal 2 (T2) Expansion:

Party

Position

Name

Telephone

Contract 3501 Antenna Farm and Sewage Pumping Station

(Build King Construction Ltd.)

Contracts Manager

 

Vincent Kwan

 

9833 1313

 

Environmental Officer

Edward Tam

9287 8270

Contract 3503 Terminal 2 Foundation and Substructure Works

(Leighton – Chun Wo Joint Venture)

Project Manager

Eric Wu

3973 1718

Environmental Officer

Malcolm Leung

3973 0850

 

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

K F Li

9086 1793

Contract 3602 Existing APM System Modification Works

(Niigata Transys Co., Ltd.)

Project Manager

Kunihiro Tatecho

9755 0351

Environmental Officer

Yolanda Gao

5399 3509

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

Xavier Lam

9493 2944

Contract 3722 Western Support Area – Construction Support Facilities

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

Deputy Project Director

Philip Kong

9049 3161

Environmental Officer

Sampson Lo

9752 9118

 

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

Tony Wong

9642 8672

Environmental Officer

Federick Wong

9842 2703

Contract 3802 APM and BHS Tunnels and Related Works

(Gammon Construction Limited)

Project Director

John Adams

6111 6989

Environmental Officer

Andy Leung

9489 0035

 

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 DCM works, marine filling, seawall and facilities construction, together with runway and associated works. 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.

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

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.

On-going

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 pursuant to EP condition 2.20.

Contamination Assessment Report (CAR)

CAR to be submitted for golf course

The CAR for Golf Course was submitted to EPD.

CAR to be submitted for Terminal 2 Emergency Power Supply System No.1 (Volume 1)

The CAR for Terminal 2 Emergency Power Supply System No.1 (Volumes 1 and 2) was submitted to EPD.

Programme for submission of supplementary CAR at the other areas to be agreed.

On-going

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 to 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

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:

   Seven skipper trainings provided by ET;

   Four dolphin observer training session provided by ET;

   Two environmental briefings on EP and EM&A requirements of the 3RS provided by ET; and

   Thirty-nine 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

Mar 2020

100%

100%

Apr 2020

100%

100%

Jun 2020

100%

100%

Overall

100%

100%

Note: The percentages are calculated by dividing the number of monitoring results within their corresponding Action and Limit Levels by the total number of monitoring results.

All monitoring results were within their corresponding Action and Limit Levels at all monitoring stations in the reporting period.

General meteorological conditions in the last month of the previous quarter and this reporting period were recorded and summarised in Table 2.3.

Table 2.3: General Meteorological Condition during Impact Air Quality Monitoring

 

Weather

Dominant Wind Direction

Mar 2020

Sunny to Rainy

East

Apr 2020

Sunny to Cloudy

West

May 2020

Sunny to Cloudy

Southwest

Jun 2020

Sunny to Cloudy

Southwest

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

Apr 2020

100%

100%

100%

100%

May 2020

100%

100%

100%

100%

Jun 2020

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. All monitoring results were also within the corresponding 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 2.6.

Table 2.6: General Meteorological Condition during Impact Noise Monitoring

 

Weather

Mar 2020

Sunny to Drizzle

Apr 2020

Sunny to Cloudy

May 2020

Sunny to Cloudy

Jun 2020

Sunny to Cloudy

2.2.3      Conclusion

Major sources of noise dominating the monitoring stations observed during the construction noise impact monitoring were traffic noise near NM1A 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.

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

 

DCM Parameters

Total Alkalinity, Heavy Metals(2)

C2

Control Station

806945

825682

C3(3)

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(3)

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

814166

821463

General Parameters

DO, pH, Temperature, Salinity, Turbidity, SS

 

DCM Parameters

Total Alkalinity, Heavy Metals(2)(4)

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(5)

Tai Ho Bay, Near Tai Ho Stream SSSI

814739

817963

SR7

Ma Wan Fish Culture Zone (FCZ)

823742

823636

SR8(6)

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)    Details of selection criteria for the two heavy metals for regular DCM monitoring refer to the Detailed Plan on Deep Cement Mixing available on the dedicated 3RS website (http://env.threerunwaysystem.com/en/ep-submissions.html).  DCM specific water quality monitoring parameters (total alkalinity and heavy metals) were only conducted at C1 to C3, SR2, and IM1 to IM12.

(3)    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.

(4)    Total alkalinity and heavy metals results are collected at SR2 as a control station for regular DCM monitoring.

(5)    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.

(6)    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 and regular DCM 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 and regular DCM monitoring are presented in Table 2.9.

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

Parameters

Action Level

Limit Level

Action and Limit Levels for general water quality monitoring and regular DCM 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

Total Alkalinity in ppm

95

99

Representative Heavy Metals for regular DCM monitoring

(Chromium)

0.2

0.2

Representative Heavy Metals for regular DCM monitoring

(Nickel)

3.2

 

3.6

 

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. Details of selection criteria for the two heavy metals for regular DCM monitoring refer to the Detailed Plan on Deep Cement Mixing available on the dedicated 3RS website http://env.threerunwaysystem.com/en/ep-submissions.html)

5. The Action and Limit Levels for the two representative heavy metals chosen will be the same as that for the intensive DCM monitoring.

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

Regular DCM Monitoring

DO

(Surface and Middle)

DO

(Bottom)

SS

Turbidity

Alkalinity

Chromium

Nickel

Apr 2020

100%

(455/455)

100%

(455/455)

100%

(507/507)

100%

(455/455)

100%

(312/312)

100%

(312/312)

100%

(312/312)

May 2020

99.8%

(437/438)

100%

(438/438)

99.8%

(487/488)

100%

(438/438)

100%

(300/300)

100%

(300/300)

100%

(300/300)

Jun 2020

93.4%

(425/455)

91.6%

(417/455)

100%

(507/507)

100%

(455/455)

100%

(312/312)

100%

(312/312)

100%

(312/312)

Overall

97.7%

97.2%

99.9%

100%

100%

100%

100%

Note: 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.

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

 

Weather

Sea Condition

Mar 2020

Sunny to Rainy

Calm to Rough

Apr 2020

Sunny to Rainy

Calm to Rough

May 2020

Sunny to Rainy

Calm to Rough

Jun 2020

Sunny to Rainy

Calm to Rough

The monitoring results for all parameters, except DO and SS, obtained during the reporting period were within their 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 DO and SS, some of the testing results triggered the relevant Action or Limit Level in the reporting period, and investigations were conducted accordingly. Summaries of results triggering Action or Limit Level for DO and SS are presented Table 2.12 to Table 2.16.

Details of the investigation findings were presented in Construction Phase Monthly EM&A Report No. 52, 53, 54, and 55, which concluded that all results triggering the Action or Limit Level were not related to the Project.

Table 2.12: Summary of DO (Surface and Middle) Results triggering Action or Limit Level (Mid-Ebb Tide)

IM1

IM2

IM3

IM4

IM5

IM6

IM7

IM8

IM9

IM10

IM11

IM12

SR2

SR3

SR4A

SR5A

SR6A

SR7

30/05/2020

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D

11/06/2020

 

D

D

D

 

 

 

 

 

 

 

 

 

 

D

 

 

 

13/06/2020

 

D

D

D

 

 

 

 

 

 

 

 

 

 

D

 

 

D

16/06/2020

 

D

D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20/06/2020

 

 

D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No. of result triggering Action or Limit Level

0

3

4

2

2

2

2

1

0

0

0

0

0

2

2

0

0

2

 

Table 2.13: Summary of DO (Bottom) Results triggering Action or Limit Level (Mid-Ebb Tide)

IM1

IM2

IM3

IM4

IM5

IM6

IM7

IM8

IM9

IM10

IM11

IM12

SR2

SR3

SR4A

SR5A

SR6A

SR7

11/06/2020

D

D

D

D

 

 

 

 

 

 

 

 

 

 

D

 

 

 

13/06/2020

 

D

D

D

 

 

 

 

 

 

 

 

 

 

D

 

 

 

16/06/2020

 

D

D

D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

18/06/2020

 

D

D

D

 

 

 

 

 

 

 

 

 

 

D

 

 

 

20/06/2020

 

D

D

 

 

 

 

 

 

 

 

 

 

 

D

 

 

 

23/06/2020

 

D

D

 

 

 

 

 

 

 

 

 

 

 

D

 

 

 

25/06/2020

 

D

 

 

 

 

 

 

 

 

 

 

 

 

D

 

 

 

No. of result triggering Action or Limit Level

1

7

6

4

1

1

1

0

0

0

0

0

0

0

6

0

0

0

Table 2.14: Summary of DO (Surface and Middle) Results triggering Action or Limit Level (Mid-Flood Tide)

IM1

IM2

IM3

IM4

IM5

IM6

IM7

IM8

IM9

IM10

IM11

IM12

SR3

SR4A

SR5A

SR6A

SR7

11/06/2020

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

13/06/2020

 

 

 

 

D

 

D

 

 

 

 

 

D

 

 

 

 

No. of result triggering Action or Limit Level

0

2

2

2

1

0

1

0

0

0

0

0

1

0

0

0

0

Table 2.15: Summary of DO (Bottom) Results triggering Action or Limit Level (Mid-Flood Tide)

IM1

IM2

IM3

IM4

IM5

IM6

IM7

IM8

IM9

IM10

IM11

IM12

SR3

SR4A

SR5A

SR6A

SR7

11/06/2020

 

 

 

 

 

 

D

 

 

 

 

 

 

 

 

 

 

13/06/2020

 

 

 

 

D

D

D

 

 

 

 

 

D

 

 

 

 

16/06/2020

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No. of result triggering Action or Limit Level

0

1

2

1

1

1

2

0

0

0

0

0

1

2

0

0

0

Table 2.16: Summary of SS Results triggering Action or Limit Level (Mid-Flood Tide)

IM1

IM2

IM3

IM4

IM5

IM6

IM7

IM8

IM9

IM10

IM11

IM12

SR1A

SR3

SR4A

SR5A

SR6A

SR7

SR8

09/05/2020

 

 

 

 

D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No. of result triggering Action or Limit Level

0

0

0

0

1

0

0

0

0

0

0

0

0

0

0

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

D

Result triggered the Limit 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

In the reporting period, it is noted that most monitoring results were within their corresponding Action and Limit Levels, while only a minor number of results triggered their corresponding Action or Limit Level, and investigations were conducted accordingly. Based on the findings presented in Construction Phase Monthly EM&A Report Nos. 52, 53, 54, and 55, all cases that triggered the corresponding Action or Limit Level 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 triggers were 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 DCM works, 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 2.17.

Table 2.17: 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 2.18. 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 visit to recyclers’ facilities to review recycling process.  Recycling materials before leaving the site are weighted by a weight bridge and monitored by CCTV system. 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 has carried out site audits regularly and reviewed the trip ticket system.  

Table 2.18: 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)

Apr 2020(2)

2,809

14,720

0

2,700

0

4,800

998

May 2020(2)

3,424

39,321

0

2,871

60

2,000

1,131

Jun 2020(2)

3,903

24,450

0

3,164

0

0

736

Total

10,136

78,491

0

8,735

60

6,800

2,865

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.

Marine Sediment Management

Marine sediment is managed according to the EIA Report, Updated EM&A Manual and the project Waste Management Plan. Sediment sampling and treatment are in progress. Treated sediment is reused as backfilling materials.

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 April to June 2020 are shown in Figure 2.3, whilst the land-based theodolite tracking survey stations are described in Table 2.19 and depicted in Figure 2.4. The location of the PAM device is shown in Figure 2.10.

Table 2.19: 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 2.20.

Table 2.20: 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 April to June 2020 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 1,349 km of survey effort was collected from these surveys, with around 94.7% of the total survey effort being conducted under favourable weather condition (i.e. Beaufort Sea State 3 or below with favourable visibility). Details of the survey effort data are presented in Appendix C.

CWD Sighting

From April to June 2020, there were a total of 41 sightings of CWDs, with 178 dolphins sighted (Table 2.21). Amongst these sightings, 40 sightings with 177 dolphins were recorded during on-effort searches under favourable weather condition.

When breaking down the sightings by survey areas, 26 sightings with 121 dolphins and 15 sightings with 57 dolphins were recorded in WL and SWL survey areas respectively during the current reporting period. No CWD was sighted in NEL, NWL or AW survey areas.

Compared with the last quarter (i.e. January to March 2020), the total number of CWD sightings and the total number of dolphins increased by around 8% and 42% respectively. Both of WL and SWL showed increases in terms of both the number of CWD sightings and number of dolphins, and such increase was most remarkable for the number of dolphins in SWL (i.e. increased by 138%). In NWL (including AW transects), the number of CWD sightings dropped from five to zero.

Compared with the same quarter of last year in 2019 (i.e. April to June 2019), there is an overall observable increase in both number of CWD sightings and number of dolphins, by 17% and 32% respectively, although the number of CWD sighting in NWL dropped to zero in this year.

Table 2.21 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 2.21: 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

 

April to June 2019

January to March 2020

April to June 2020

NEL

0 (0)

0 (0)

0 (0)

NWL

9 (22)

4 (16)

0 (0)

AW

0 (0)

1 (6)

0 (0)

WL

20 (96)

25 (79)

26 (121)

SWL

6 (17)

8 (24)

15 (57)

Total

35 (135)

38 (125)

41 (178)

Note: Values in ( ) represent number of dolphins

The distribution of CWD sightings recorded from April to June 2020 is illustrated in Figure 2.5. In WL, CWD sightings mainly clustered at waters between Tai O and Yi O, and also between Peaked Hill and Fan Lau. In SWL, most of the CWD sightings scattered from Fan Lau to the waters north of the Soko Islands. No CWD sightings were recorded in NEL, NWL or AW survey areas. Details of the sighting data are presented in Appendix C.

Figure 2.5: Sightings Distribution of Chinese White Dolphins from April to June 2020


Remarks: (1) Please note that there are 41 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 April, May and June 2020 are summarised in Table 2.22.

In this reporting period, both the monthly STG and ANI increased from April to June. The running quarterly STG slightly decreased from April to May and rebounded in June at a level higher than April, while the running quarterly ANI increased from April to June. No action Level for CWD monitoring was triggered during the reporting period.

Compared with the previous reporting period (i.e. January to March 2020), both the running quarterly STG and ANI increase, from 2.82 to 3.13 and from 9.17 to 13.86 respectively. While comparing with the same quarter of last year (i.e. April to June 2019), both the running quarterly STG and ANI increased, from 2.73 to 3.13 and from 10.54 to 13.86 respectively.

Table 2.22: 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

 

Apr 19

May 19

Jun 19

Jan 20

Feb 20

Mar 20

Apr 20

May 20

Jun 20

Monthly STG

2.86

2.33

3.02

2.89

3.13

2.42

1.58

2.12

5.86

Monthly ANI

10.78

10.72

10.07

11.32

8.43

7.76

6.77

13.91

21.47

Running Quarterly STG

2.10

2.37

2.73

2.65

2.86

2.82

2.36

2.03

3.13

Running Quarterly ANI

7.47

9.80

10.54

7.86

8.89

9.17

7.63

9.45

13.86

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 No. 52, 53 and 54.

Group Size

Between April and June 2020, the group size of CWD sightings ranged from 1 to 16 dolphins. The average group size of CWDs was 4.3 dolphins per group, which is larger than that of the last quarter (3.3 dolphins per group). The average group size of CWDs in this reporting quarter is also larger than that of the same quarter of last year (3.9 dolphins per group).

In this reporting quarter, the number of CWD sightings with medium group size (i.e. 3-9 dolphins) was slightly higher than that with small group size (i.e. 1-2 dolphins). There were four CWD sightings with large group size (i.e. 10 or more dolphins) recorded in this reporting period.

There were no distinct distribution patterns of small-sized and medium-sized CWD groups observed in the current reporting period, except that in SWL the medium-sized CWD groups tended to cluster at the coastal waters between Lantau and the Soko Islands. 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 41 circles on the map indicating the sighting locations of CWD. Some of them were very close to each other and therefore appear overlapped on this sighting distribution map. (2) Marine park excludes land area and the landward boundary generally follows the high water mark along the coastline.

Activities and Association with Fishing Boats

From April to June 2020, 11 sightings of CWDs were recorded with feeding activities.  Amongst these sightings, two were observed in association with operating purse seiner, one was in association with pair trawler and another one was associated with gillnetter.

The number of sightings with feeding recorded in the current reporting period is higher than that in the previous reporting period (i.e. seven sightings involved feeding activities in which no sighting associated with fishing boat between January and March 2020). The number of CWD sightings with feeding activities is the same compared with the data in the same quarter of last year (i.e. 11 sightings between April and June 2019).

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 April to June 2020, seven sightings of CWDs were recorded with the presence of mother-and-unspotted juvenile, which is much more than that recorded in the previous reporting quarter (i.e. two sightings in January to March 2020) but slightly fewer than that recorded in the same quarter of last year (i.e. nine sightings in April to June 2019). All these sightings were recorded in WL except one recorded in SWL.

The locations of CWD sightings with the presence of mother-and-unspotted juvenile are shown in Figure 2.8.


 

Figure 2.8: Sighting Locations of Mother-calf Pairs

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

Photo Identification

During April to June 2020, a total number of 66 different CWD individuals were identified altogether for 115 times. Re-sighting information of CWD individuals provides an initial idea of their range use and apparent connection between different areas around Lantau. Amongst these 66 different CWD individuals, 34 animals (i.e. NLMM015, NLMM057, NLMM063, SLMM002, SLMM003, SLMM007, SLMM014, SLMM023, SLMM025, SLMM028, SLMM030, SLMM031, SLMM034, SLMM049, SLMM052, SLMM070, SLMM072, WLMM006, WLMM007, WLMM013, WLMM018, WLMM027, WLMM028, WLMM029, WLMM043, WLMM073, WLMM075, WLMM081, WLMM082, WLMM090, WLMM107, WLMM114, WLMM131 and WLMM150) were sighted for more than once.

Fourteen individuals including SLMM002, SLMM014, SLMM023, SLMM025, SLMM028, SLMM031, SLMM034, SLMM049, SLMM052, SLMM072, WLMM018, WLMM073, WLMM114 and WLMM131 were re-sighted in different survey areas during this reporting period. All cross-area movement were between WL and SWL survey areas. The most frequently re-sighted individual in this reporting quarter was WLMM114 which has been encountered altogether for six 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 higher than those of the previous reporting quarter from January to March 2020 (19 and nine individuals respectively).

A summary of photo identification works is presented in Table 2.23. Representative photos of the 66 identified individuals and figures depicting the sighting locations of the aforementioned 34 re-sighted individuals recorded in this reporting period are presented Appendix C.

Table 2.23: Summary of Photo Identification

Individual ID

Date of sighting

Sighting Group No.

Area

 

Individual
ID

Date of sighting

Sighting Group No.

Area

NLMM011

11-Jun-20

1

WL

WLMM004

16-Jun-20

5

WL

NLMM015

22-Jun-20

1

SWL

WLMM005

07-May-20

3

WL

2

SWL

WLMM006

09-Apr-20

6

WL

NLMM043

16-Jun-20

1

WL

07-May-20

3

WL

NLMM055

11-Jun-20

5

WL

WLMM007

09-Apr-20

6

WL

NLMM057

09-Apr-20

1

WL

07-May-20

3

WL

3

WL

13-May-20

3

WL

NLMM063

22-Jun-20

1

SWL

WLMM009

07-May-20

2

WL

2

SWL

WLMM011

22-Jun-20

2

SWL

NLMM070

09-Apr-20

3

WL

WLMM013

09-Apr-20

6

WL

SLMM002

09-Apr-20

6

WL

16-Jun-20

2

WL

12-May-20

5

SWL

WLMM015

16-Jun-20

4

WL

13-May-20

1

WL

WLMM018

13-May-20

3

WL

3

WL

22-Jun-20

4

SWL

SLMM003

07-May-20

3

WL

WLMM027

07-May-20

1

WL

13-May-20

3

WL

13-May-20

3

WL

SLMM007

09-Apr-20

6

WL

WLMM028

09-Apr-20

6

WL

07-May-20

3

WL

07-May-20

3

WL

SLMM010

11-May-20

4

SWL

WLMM029

09-Apr-20

6

WL

SLMM012

11-May-20

4

SWL

07-May-20

3

WL

SLMM014

09-Apr-20

6

WL

WLMM030

16-Jun-20

2

WL

11-May-20

4

SWL

WLMM043

11-Jun-20

4

WL

18-Jun-20

1

SWL

7

WL

2

SWL

WLMM056

09-Apr-20

1

WL

SLMM023

11-May-20

4

SWL

WLMM060

09-Apr-20

1

WL

13-May-20

1

WL

WLMM062

16-Jun-20

2

WL

3

WL

WLMM070

11-May-20

4

SWL

SLMM025

11-May-20

4

SWL

WLMM073

11-May-20

4

SWL

16-Jun-20

5

WL

13-May-20

3

WL

18-Jun-20

1

SWL

22-Jun-20

4

SWL

SLMM028

09-Apr-20

6

WL

WLMM075