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

Construction Phase Quarterly EM&A Report No.15 (1 July to 30 September 2019)

December 2019

 

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

2.7     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 9

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  13

Table 2.2: Percentage of Air Quality Monitoring Results within Action and Limit Levels  13

Table 2.3: General Meteorological Condition During Impact Air Quality Monitoring  13

Table 2.4: Impact Noise Monitoring Stations  14

Table 2.5: Percentage of Noise Monitoring Results within Action and Limit Levels  14

Table 2.6: General Meteorological Condition During Impact Noise Monitoring  15

Table 2.7: Monitoring Locations and Parameters for Impact Water Quality Monitoring  15

Table 2.8: Action and Limit Levels for General Water Quality Monitoring and Regular DCM Monitoring  16

Table 2.9: The Control and Impact Stations during Flood Tide and Ebb Tide for General Water Quality Monitoring and Regular DCM Monitoring  17

Table 2.10: Percentage of Water Quality Monitoring Results within Action and Limit Levels  18

Table 2.11: General Weather Condition and Sea Condition During Impact Water Quality Monitoring  18

Table 2.12: Summary of DO (Surface and Middle) Results Triggering Action or Limit Level (Mid-Ebb Tide) 18

Table 2.13: Summary of DO (Bottom) Results Triggering Action or Limit Level (Mid-Ebb Tide) 19

Table 2.14: Summary of DO (Surface and Middle) Results Triggering Action or Limit Level (Mid-Flood Tide) 19

Table 2.15: Summary of DO (Bottom) Results Triggering Action or Limit Level (Mid-Flood Tide) 19

Table 2.16: Summary of SS Results Triggering Action or Limit Level (Mid-Ebb Tide) 19

Table 2.17: Summary of SS Results Triggering Action or Limit Level (Mid-Flood Tide) 19

Table 2.18: Summary of Nickel Results Triggering Action or Limit Level (Mid-Ebb Tide) 20

Table 2.19: Summary of Nickel Results Triggering Action or Limit Level (Mid-Flood Tide) 20

Table 2.20: Action and Limit Levels for Construction Waste  21

Table 2.21: Construction Waste Statistics  21

Table 2.22: Land-based Theodolite Tracking Survey Station Details  22

Table 2.23: Derived Values of Action Level and Limit Level for Chinese White Dolphin Monitoring  22

Table 2.24: Summary of Number of CWD Sightings and Number of Dolphins for the Same Quarter Last Year, Previous Quarter, and Current Reporting Period  23

Table 2.25: 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  25

Table 2.26: Summary of Photo Identification  29

Table 2.27: 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 2.2a

Water Quality Monitoring Stations  

Figure 2.2b

Updated Water Quality Monitoring Stations (Since 8 August 2019)

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

CTP

Coral Translocation Plan

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

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 15th 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 July 2019 to 30 September 2019.  

Key Activities in the Reporting Period

The key activities of the Project carried out in the reporting period included reclamation works and land-side works. Reclamation works included deep cement mixing (DCM) works, marine filling, and seawall construction. Land-side works involved mainly 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

38

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

6

Land-based theodolite tracking survey effort for CWD monitoring

9

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

A screenshot of a cell phone

Description automatically generated

 

 

Pay for Environmental Scheme to Promote Contractors’ Environmental Performance

Safety Sand Berm Constructed along Seawall

Support and Enhance On-going Fisheries Operations

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

1.     AAHK initiated an incentive scheme, called Pay for the Environmental Scheme to promote best environmental implementation practices and to enhance contractors’ environmental awareness and performance.

2.     Safety sand berm was constructed along partially completed seawall for safety reason, as well as to prevent site runoff from leaking into marine waters.

3.     Pilot tests on re-stocking suitable fish fry have commenced with an aim of contributing to enhancing marine ecology and fisheries resources in North Lantau waters.

 

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 turbidity, total alkalinity and chromium 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 dissolved oxygen (DO), suspended solid (SS) and nickel, some testing results triggered the relevant Action or Limit Levels, 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

 

Starting from 8 Aug 2019, one of the water quality sensitive receiver stations was relocated.

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. 42.

1.2      Scope of this Report

This is the 15th 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 July 2019 to 30 September 2019.

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 and 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

 

Deep Cement Mixing (DCM) Works:

Party

Position

Name

Telephone

Contract 3201 DCM (Package 1)

(Penta-Ocean-China State-Dong-Ah Joint Venture)

Project Director

Tsugunari Suzuki

9178 9689

Environmental Officer

Hiu Yeung Tang

 

6329 3513

Contract 3205 DCM (Package 5)

(Bachy Soletanche - Sambo Joint Venture)

Deputy Project Director

Min Park

9683 0765

Environmental Officer

William Chan

5408 3045

 

Reclamation Works:

 

 

 

Party

Position

Name

Telephone

Contract 3206

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

Project Manager

Kim Chuan Lim

3763 1509

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

Nelson Tam

9721 3942

Contract 3302 Eastern Vehicular Tunnel Advance Works

(China Road and Bridge Corporation)

 

Project Manager

Wan Cheung Lee

6100 6075

Environmental Officer

Wilmer Ng

3919 9421

Contract 3303 Third Runway and Associated Works

(SAPR Joint Venture)

Project Manager

Steven Meredith

6109 1813

Environmental Officer

Pan Fong

9436 9435

 

Third Runway Concourse and Integrated Airport Centres Works:

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

 

Terminal 2 Expansion Works:

Party

Position

Name

Telephone

Contract 3501 Antenna Farm and Sewage Pumping Station

(Build King Construction Ltd.)

Project Manager

Vincent Kwan

9833 1313

Environmental Officer

Edward Tam

9287 8270

Contract 3502 Terminal 2 APM Depot Modification Works

(Build King Construction Ltd.)

Project Manager

David Ng

9010 7871

Environmental Officer

Chun Pong Chan

9187 7118

Contract 3503 Terminal 2 Foundation and Substructure Works

(Leighton – Chun Wo Joint Venture)

Construction Manager

Eric Wu

3973 1718

Environmental Officer

Stephen Tsang

5508 6361

 

Automated People Mover (APM) Works:

Party

Position

Name

Telephone

Contract 3602 Existing APM System Modification Works

(Niigata Transys Co., Ltd.)

Project Manager

Kunihiro Tatecho

9755 0351

Environmental Officer

Arthur Wong

9170 3394

 

Baggage Handling System (BHS) Works:

Party

Position

Name

Telephone

Contract 3603 3RS Baggage Handling System (VISH Consortium)

Project Manager

Andy Ng

9102 2739

Environmental Officer

Eric Ha

9215 3432

 

Airport Support Infrastructure and Logistic Works:

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

Fredrick Wong

9842 2703

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-side works. Reclamation works included deep cement mixing (DCM) works, marine filling, and seawall construction. Land-side works involved mainly 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 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) for Golf Course

CAR to be submitted for golf course first

The CAR for Golf Course 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:

   Two skipper trainings provided by ET;

    One dolphin observer training session provided by ET;

    Twenty-five environmental management meetings for EM&A review with works contracts

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

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

Jul 2019

100.0%

100.0%

Aug 2019

100.0%

100.0%

Sep 2019

100.0%

100.0%

Overall

100.0%

100.0%

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

Jun 2019

Sunny to Cloudy

Southwest

Jul 2019

Sunny to Cloudy

Southwest

Aug 2019

Sunny to Rainy

Southwest

Sep 2019

Sunny to Drizzle

Northwest

2.1.3      Conclusion

No dust emission source from Project activities was observed during impact air quality monitoring. Major sources of dust observed at the monitoring stations during the monitoring sessions were local air pollution and nearby traffic emissions. It is considered that the monitoring work in the reporting period was effective and there was no adverse impact attributable to the Project activities.

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

Jul 2019

100.0%

100.0%

100.0%

100.0%

Aug 2019

100.0%

100.0%

100.0%

100.0%

Sep 2019

100.0%

100.0%

100.0%

100.0%

Overall

100.0%

100.0%

100.0%

100.0%

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

Jun 2019

Sunny to Cloudy

Jul 2019

Sunny to Cloudy

Aug 2019

Sunny to Drizzle

Sep 2019

Sunny to Drizzle

2.2.3      Conclusion

As the construction activities were far away from the monitoring stations, major sources of noise dominating the monitoring stations observed during the monitoring sessions were traffic noise near NM1A, school activities at NM4, and aircraft and helicopter noise near NM5 and NM6. It is considered that the monitoring work in the reporting period was effective and there was no adverse impact attributable to the Project activities.

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 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 2.2a shows the locations of the monitoring stations. The monitoring location for SR6 has been relocated to SR6A since 8 August 2019. The updated monitoring locations are presented in Figure 2.2b from that day onwards.

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

Monitoring Station

Description

Coordinates

Parameters

 

 

Easting

Northing

 

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

SR6(5)

Tai Ho Bay, Near Tai Ho Stream SSSI

814663

817899

SR6A(5)

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, SR6, SR6A, SR8

Ebb Tide

 

C1

SR4A, SR5A, SR6, 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

Jul 2019

98.5%

91.4%

100.0%

100.0%

100.0%

100.0%

100.0%

Aug 2019

100.0%

100.0%

99.6%

100.0%

100.0%

100.0%

98.7%

Sep 2019

99.5%

100.0%

98.7%

100.0%

100.0%

100.0%

99.7%

Overall

99.3%

97.1%

99.5%

100.0%

100.0%

100.0%

99.5%

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

Jun 2019

Sunny to Rainy

Calm to Rough

Jul 2019

Sunny to Rainy

Calm to Rough

Aug 2019

Sunny to Rainy

Calm to Rough

Sep 2019

Sunny to Cloudy

Calm to Rough

The monitoring results for turbidity, total alkalinity, and chromium obtained in 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, SS and nickel, 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 nickel are presented in Table 2.12 to Table 2.19.

Details of the investigation findings were presented in Construction Phase Monthly EM&A Report No. 43, 44 and 45, 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

SR6/

SR6A*

SR7

11/7/2019

 

D

D

D

 

 

 

 

 

 

 

 

 

 

D

 

 

 

No. of result triggering Action or Limit Level

0

1

1

1

0

0

1

0

0

0

0

0

0

0

1

0

0

0

 

 

 

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

SR6/

SR6A*

SR7

11/7/2019

D

D

D

D

 

 

 

 

 

 

D

 

 

 

D

 

 

D

13/7/2019

 

 

D

D

 

 

 

 

 

 

 

 

 

 

D

 

 

 

27/7/2019

 

D

D

D

 

 

 

 

 

 

 

 

 

 

D

 

 

D

No. of result triggering Action or Limit Level

1

2

3

3

1

3

2

0

0

0

1

0

0

1

3

0

0

2

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

SR2

SR3

SR4A

SR5A

SR6/

SR6A*

SR7

11/7/2019

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10/9/2019

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No. of result triggering Action or Limit Level

0

0

0

1

0

0

0

0

0

0

0

0

0

0

0

1

1

1

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

SR2

SR3

SR4A

SR5A

SR6/

SR6A*

SR7

11/7/2019

 

 

 

 

D

D

 

 

 

 

 

 

 

 

 

 

 

 

13/7/2019

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

27/7/2019

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No. of result triggering Action or Limit Level

1

3

3

3

1

1

0

0

0

0

1

0

0

0

3

0

0

1

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

IM1

IM2

IM3

IM4

IM5

IM6

IM7

IM8

IM9

IM10

IM11

IM12

SR1A

SR2

SR3

SR4A

SR5A

SR6/

SR6A*

SR7

SR8

31/8/2019

 

 

D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D

 

 

3/9/2019

D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

28/9/2019

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No. of result triggering Action or Limit Level

1

0

1

0

1

0

0

0

1

0

0

0

0

0

0

0

0

1

0

0

Table 2.17: 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

SR6/

SR6A*

SR7

SR8

3/9/2019

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

28/9/2019

 

 

 

 

 

 

 

 

D

 

 

 

 

 

 

 

 

 

 

No. of result triggering Action or Limit Level

1

0

1

0

0

0

0

0

1

0

0

0

0

0

0

0

0

0

0

Table 2.18: Summary of Nickel Results Triggering Action or Limit Level (Mid-Ebb Tide)

IM1

IM2

IM3

IM4

IM5

IM6

IM7

IM8

IM9

IM10

IM11

IM12

12/9/2019

 

 

 

D

 

 

 

 

 

 

 

 

No. of result triggering Action or Limit Level

0

0

0

1

0

0

0

0

0

0

0

0

Table 2.19: Summary of Nickel Results Triggering Action or Limit Level (Mid-Flood Tide)

IM1

IM2

IM3

IM4

IM5

IM6

IM7

IM8

IM9

IM10

IM11

IM12

10/8/2019

 

 

 

 

D

D

D

 

 

 

 

 

No. of result triggering Action or Limit Level

1

0

0

0

1

1

1

0

0

0

0

0

Note: The monitoring results on monitoring dates not presented in the above tables did not trigger their corresponding Action or Limit Levels. Detailed results are presented in Appendix C.

 

Note*: SR6 has been relocated to SR6A starting from 8 August 2019

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

 

Result triggered the Limit Level at monitoring station located upstream 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 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 No. 43, 44 and 45, 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 2.20.

Table 2.20: 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.

Based on updated contractors’ information, summary of construction waste generated in the reporting period is presented in Table 2.21.

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.

Table 2.21: Construction Waste Statistics

 

C&D1 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

(m3)

Chemical Waste

(kg)

Chemical Waste

(L)

General Refuse (tonne)

Jul 20192

4,821

4,568

665

4,627

200

9,040

399

Aug 20192

7,766

5,568

0

3,447

200

7,200

827

Sep 20192

4,369

499

11,672

3,963

75

3,600

748

Total

16,956

10,635

12,337

12,037

475

19,840

1,974

 

Notes:

1.     C&D refers to Construction and Demolition.

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

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. Since January 2019, additional theodolite tracking survey for one day at LKC station was conducted on a voluntary basis to collect supplementary information for the Project, such that a total of one tracking day at SC station and two tracking days at LKC station were conducted per month. 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 July to September 2019 are shown in Figure 2.3, whilst the land-based theodolite tracking survey stations are described in Table 2.22 and depicted in Figure 2.4. The location of the PAM device is shown in Figure 2.10.

Table 2.22: 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 2.23.

Table 2.23: 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 July to September 2019 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 1,347 km of survey effort was collected from these surveys, with around 95.6% 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 July to September 2019, there were a total of 69 sightings of CWDs, with 283 dolphins sighted (Table 2.24). All these sightings were made during on-effort searches under favourable weather condition.

When breaking down the sightings by survey areas, 3 sightings with 4 dolphins, 41 sightings with 182 dolphins and 25 sightings with 97 dolphins were recorded in NWL, WL and SWL survey areas respectively during the current reporting period. No CWD was sighted in NEL or AW survey areas.

Compared with the last quarter (i.e. April to June 2019), there is an overall increase in terms of both number of CWD sightings and number of dolphins (increased by around 97% and 110% respectively). WL and SWL both showed drastic increases in terms of both number of CWD sightings and number of dolphins, and such increases were most remarkable in SWL as the number of CWD sightings and number of dolphins increased by around 317% and 471% respectively. On the other hand, NWL experienced an observable decline in terms of both number of CWD sightings and number of dolphins by about 67% and 82% respectively.

Compared with the same quarter of last year in 2018 (i.e. July to September 2018), there were an overall increase in both number of CWD sightings and number of dolphins by 8% and 41% respectively. The increase is mainly contributed by SWL waters with the number of CWD sightings and number of dolphins increased by around 108% and 185% respectively. On the other hand, NWL showed a decline in both numbers of sightings and dolphins by 73% and 86% respectively.

Table 2.24 below shows the comparison of the numbers of sightings and dolphins amongst the current reporting period, last quarter, and the same quarter of year 2018.

Table 2.24: 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

 

July to September 2018

April to June 2019

July to September 2019

NEL

1 (1)

0 (0)

0 (0)

NWL

11 (29)

9 (22)

3 (4)

AW

0 (0)

0 (0)

0 (0)

WL

40 (137)

20 (96)

41 (182)

SWL

12 (34)

6 (17)

25 (97)

Total

64 (201)

35 (135)

69 (283)

Note: Values in ( ) represent number of dolphins

The distribution of CWD sightings recorded from July to September 2019 is illustrated in Figure 2.5. In NWL, one CWD sighting was recorded off the northwestern corner of Lung Kwu Chau while the remaining two CWD sightings were recorded at the southwestern corner of the survey area. In WL, CWD sightings distributed from the northern part of survey area around the Hong Kong-Zhuhai-Macao Bridge Hong Kong Link Road to Fan Lau, with more sightings clustered at waters near Tai O, Yi O, Peaked Hill and Fan Lau. In SWL, CWD sightings scattered over the relatively inshore waters from Fan Lau to Shui Hau, with more sightings recorded at waters around the Soko Islands. No CWD sightings were recorded in NEL or in close vicinity of the 3RS works area. Details of the sighting data are presented in Appendix C.

Figure 2.5: Sightings Distribution of Chinese White Dolphins from Jul to Sep 2019


Remarks: Please note that there are 69 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.

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 July, August and September 2019 are summarised in Table 2.25.

In this reporting period, both the monthly STG and ANI decreased from the exceptionally high records in July to August, but rebounded in September. Both running quarterly STG and ANI increased from July to September 2019.

Compared with the previous reporting period, there are increases in both running quarterly STG (from 2.73 to 5.36) and running quarterly ANI (from 10.54 to 21.98). While comparing with the same quarter of last year (i.e. July to September 2018), both the running quarterly STG and ANI increased from 4.82 to 5.36 and from 15.32 to 21.98 respectively.     

Table 2.25: 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

 

Jul 18

Aug 18

Sep 18

Apr 19

May 19

Jun 19

Jul 19

Aug 19

Sep 19

Monthly STG

5.04

4.48

4.97

2.86

2.33

3.02

7.64

3.95

4.47

Monthly ANI

13.86

15.67

16.26

10.78

10.72

10.07

31.72

16.50

17.63

Running Quarterly STG

3.74

4.66

4.82

2.10

2.37

2.73

4.37

4.92

5.36

Running Quarterly ANI

11.57

15.58

15.32

7.47

9.80

10.54

17.72

19.69

21.98

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. 43, 44 and 45.

Group Size

Between July and September 2019, the group size of CWD sightings ranged from 1 to 17 dolphins. The average group size of CWDs was 4.1 dolphins per group which is slightly larger than that of the last quarter which was 3.9. The average group size of CWDs in this reporting quarter is also larger that of the same quarter of last year (3.1 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. Amongst all 69 sightings, there were six sightings with large group size (i.e. 10 or more dolphins). The large CWD groups were sighted in WL and SWL. In WL, there were four CWD sightings with large group size and they scattered from Tai O to Fan Lau. In SWL, the two CWD sightings with large group size were recorded at the central and western side of the Soko Islands.

There were no distinct distribution patterns of small-sized and medium-sized CWD groups observed in the current reporting period. However, all CWD groups recorded in NWL were small-sized. 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: Please note that there are 69 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.

Activities and Association with Fishing Boats

During July to September 2019, 18 sightings of CWDs were recorded with feeding activities.  None of these sightings were observed in association with operating fishing boats.

The number of sightings with feeding recorded in the current reporting period is higher than the last reporting period (11 sightings involved feeding activities with two sightings associated with operating fishing boat in April to June 2019). The number of CWD sightings with feeding activities is higher when compared with the data in the same quarter of last year (i.e. 12 sightings in July to September 2018).

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

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


Mother-calf Pairs

From July to September 2019, 11 sightings of CWDs were recorded with the presence of mother-and-unspotted calf and/or mother-and-unspotted juvenile, which is more than that of the last reporting quarter (i.e. 8 sightings between April and June 2019). The number is equal to that recorded in the same quarter of last year (i.e. 11 sightings between July and September 2018). The majority of these sightings were recorded in WL survey area.

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

 

Figure 2.8: Sighting Locations of Mother-calf Pairs


Photo Identification

During July to September 2019, a total number of 104 different CWD individuals were identified altogether for 166 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 104 different CWD individuals, 36 animals (i.e. NLMM001, NLMM015, NLMM063, SLMM003, SLMM007, SLMM012, SLMM022, SLMM029, SLMM037, SLMM049, SLMM052, SLMM053, SLMM062, SLMM064, SLMM070, WLMM004, WLMM027, WLMM039, WLMM043, WLMM049, WLMM056, WLMM065, WLMM067, WLMM069, WLMM078, WLMM079, WLMM081, WLMM082, WLMM090, WLMM094, WLMM104, WLMM115, WLMM122, WLMM131, WLMM132 and WLMM147) were sighted for more than once.

Fourteen individuals including NLMM001, NLMM015, NLMM063, SLMM049, SLMM053, SLMM064, WLMM004, WLMM056, WLMM065, WLMM067, WLMM078, WLMM079, WLMM104 and WLMM115 were re-sighted in different survey areas during this reporting period. NLMM063 and WLMM115 had cross-area movement between NWL and WL survey areas, while the others had cross-area movement between WL and SWL survey areas. The most frequently re-sighted individual in this reporting quarter was WLMM079 which has been encountered altogether for 6 times. The number of re-sighted CWD individuals and the number of CWD individuals showing cross-area movement from July to September 2019 are both higher than those of the last reporting quarter (29 and 12 individuals respectively).

A summary of photo identification works is presented in Table 2.26. Representative photos of the 104 identified individuals and figures depicting the sighting locations of the aforementioned 36 re-sighted individuals recorded in this reporting period are presented Appendix C.

Table 2.26: Summary of Photo Identification

Individual ID

Date of sighting

Sighting Group No.

Area

 

Individual
ID

Date of sighting

Sighting Group No.

Area

NLMM001

16-Jul-19

6

WL

 

WLMM039

16-Jul-19

5

WL

18-Jul-19

1

SWL

 

8-Aug-19

7

WL

3

SWL

 

21-Aug-19

3

WL

NLMM012

21-Aug-19

1

WL

 

WLMM040

17-Jul-19

6

SWL

NLMM015

9-Sep-19

6

SWL

 

WLMM043

16-Jul-19

1

WL

12-Sep-19

1

WL

 

25-Sep-19

6

WL

NLMM020

9-Sep-19

6

SWL

 

WLMM046

18-Jul-19

3

SWL

NLMM021

21-Aug-19

2

WL

 

WLMM049

16-Jul-19

3

WL

NLMM027

21-Aug-19

2

WL

 

25-Sep-19

5

WL

NLMM033

8-Aug-19

1

WL

 

WLMM051

8-Aug-19

1

WL

NLMM037

24-Jul-19

1

NWL

 

WLMM052

16-Jul-19

5

WL

NLMM040

8-Aug-19

2

WL

 

WLMM054

9-Sep-19

1

SWL

NLMM041

8-Aug-19

2

WL

 

WLMM056

17-Jul-19

2

SWL

NLMM043

25-Sep-19

1

WL

 

21-Aug-19

5

WL

NLMM046

8-Aug-19

2

WL

 

9-Sep-19

6

SWL

NLMM049

23-Jul-19

6

WL

 

WLMM060

12-Sep-19

3

WL

NLMM056

8-Aug-19

1

WL

 

WLMM062

25-Sep-19

2

WL

NLMM061

17-Jul-19

9

SWL

 

WLMM063

17-Jul-19

10

SWL

NLMM063

24-Jul-19

1

NWL

 

WLMM065

17-Jul-19

9

SWL

21-Aug-19

5

WL

 

12-Sep-19

3

WL

12-Sep-19

1

WL

 

25-Sep-19

5

WL

NLMM067

8-Aug-19

1

WL

 

WLMM067

17-Jul-19

2

SWL

SLMM002

25-Sep-19

9

WL

 

25-Sep-19

9

WL

SLMM003

16-Jul-19

6

WL

 

WLMM069

17-Jul-19

4

SWL

21-Aug-19

5

WL

 

18-Jul-19

3

SWL

12-Sep-19

2

WL

 

WLMM071

12-Sep-19

5

WL

3

WL

 

WLMM075

25-Sep-19

2

WL

SLMM007

16-Jul-19

6

WL

 

WLMM078

18-Jul-19

4

SWL

12-Sep-19

2

WL

 

25-Sep-19

8

WL

25-Sep-19

9

WL

 

WLMM079

18-Jul-19

1

SWL

SLMM010

21-Aug-19

5

WL

 

3

SWL

SLMM012

17-Jul-19

2

SWL

 

23-Jul-19

7

WL

18-Jul-19

1

SWL

 

21-Aug-19

5

WL

9-Sep-19

6

SWL

 

12-Sep-19

2

WL

SLMM014

18-Jul-19

4

SWL

 

3

WL

SLMM022

23-Jul-19

7

WL

 

WLMM081

16-Jul-19

4

WL

25-Sep-19

8

WL

 

8-Aug-19

4

WL

 

9

WL

 

WLMM083

16-Jul-