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

Construction Phase Quarterly EM&A Report No.9 (1 January to 31 March 2018)

June 2018

 

 

 

 

 

 

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     Weekly Environmental Site Inspection

2.7     Ecological Monitoring

2.8     Audit of SkyPier High Speed Ferries

2.9     Audit of Construction and Associated Vessels

2.10    Coral Post-Translocation Monitoring

2.11    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 6

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 9

Table 2.1: Impact Air Quality Monitoring Stations  13

Table 2.2: Percentage Compliance of Air Quality Monitoring Results  13

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

Table 2.4: Impact Noise Monitoring Results  14

Table 2.5: Impact Noise Monitoring Results  14

Table 2.6: Monitoring Locations and Parameters for Impact Water Quality Monitoring  15

Table 2.7: Action and Limit Levels for General Water Quality Monitoring and Regular DCM Monitoring  16

Table 2.8: The Control and Impact Stations during Flood Tide and Ebb Tide for General Water Quality Monitoring and Regular DCM Monitoring  17

Table 2.9: Percentage of Monitoring Results Complying with Action and Limit Levels  17

Table 2.10: Summary of SS Results Triggering Action or Limit Level (Mid-Ebb Tide) 18

Table 2.11: Summary of SS Results Triggering Action or Limit Level (Mid-Flood Tide) 18

Table 2.12: Summary of Chromium Results Triggering Action or Limit Level (Mid-Ebb Tide) 18

Table 2.13: Summary of Chromium Results Triggering Action or Limit Level (Mid-Flood Tide) 18

Table 2.14: Summary of Nickel Results Triggering Action or Limit Level (Mid-Flood Tide) 19

Table 2.15: Action and Limit Levels for Construction Waste  20

Table 2.16: Summary of Construction Waste Generated in the Reporting Period  20

Table 2.17: Land-based Theodolite Tracking Survey Station Details  21

Table 2.18: Derived Values of Action Level and Limit Level for Chinese White Dolphin Monitoring  21

Table 2.19: Summary of Number of CWD Sightings and Number of Dolphins for the Same Quarter Last Year, Previous Quarter, and Current Reporting Period  22

Table 2.20: Summary of Monthly and Running Quarterly STG and ANI of Chinese White Dolphin for Previous and Current Reporting Periods  24

Table 2.21: Summary of Photo Identification  28

Table 2.22: Summary of Survey Effort and CWD Group of Land-based Theodolite Tracking Survey  29

Table 3.1: Summary of Environmental Complaints  35

Table 3.2: Statistics for Valid Exceedances for the Environmental Monitoring  36

Table 3.3: Statistics for Non-compliance, Complaints, Notifications of Summons and Prosecution  36

 

 

 

 

 

 

 

 

 

Figures

Figure 1.1- 1.2

Locations of Key Construction Activities in this reporting period

Figure 2.1

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

Figure 2.2

Locations of 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 Organization 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

CNP

Construction Noise Permit

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

EP

Environmental Permit

EPD

Environmental Protection Department

ET

Environmental Team

FCZ

Fish Culture Zone

HDD

Horizontal Directional Drilling

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

Marine Surveillance System

MTRMP-CAV

Marine Travel Routes and Management Plan for Construction and Associated Vessel

NEL

Northeast Lantau

NWL

Northwest Lantau

PAM

Passive Acoustic Monitoring

PVD

Prefabricated Vertical Drain

SC

Sha Chau

SCLKCMP

Sha Chau and Lung Kwu Chau Marine Park

SS

Suspended Solids

STG

Encounter Rate of Number of Dolphin Sightings

SWL

Southwest Lantau

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.

This is the 9th Construction Phase Quarterly EM&A Report for the Project which summarizes the monitoring results and audit findings of the EM&A programme during the reporting period from 1 January 2018 to 31 March 2018.   

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, laying of sand blanket, seawall construction, and prefabricated vertical drain (PVD) installation. Land-side works included horizontal directional drilling (HDD) works, site establishment, site office construction, road and drainage works, cable ducting, demolition and modification of existing facilities, concrete removal works, piling, and excavation works.

EM&A Activities Conducted in the Reporting Period

The EM&A programme was undertaken in accordance with the Updated EM&A 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

102

Noise monitoring

65

Water quality monitoring

39

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

6

Land-based theodolite tracking survey effort for CWD monitoring

15

Terrestrial ecology monitoring

3

Apart from the regular site inspections, audit of SkyPier High Speed Ferries (HSF), audit of the construction and associated vessels, and audit of the implementation of Marine Mammal Watching Plan (MMWP) and Dolphin Exclusion Zone (DEZ) Plan were also conducted in the reporting period. Based on the information including ET’s observations, records of Marine Surveillance System (MSS) and contractors’ site records, the environmental mitigation measures were properly implemented and the construction activities of the Project in the reporting period did not introduce adverse impacts to the sensitive receivers.

Snapshots of EM&A Activities in the Reporting Period

http://env.threerunwaysystem.com/Monthly%20EM&A/201802%2025th%20EM&A%20Report/Monthly%20EMA%20Report%20No%2025_files/image001.jpg

http://env.threerunwaysystem.com/Monthly%20EM&A/201803%2026th%20EM&A%20Report/Monthly%20EMA%20Report%20No%2026_files/image002.jpg

http://env.threerunwaysystem.com/Monthly%20EM&A/201804%2027th%20EM&A%20Report/Monthly%20EMA%20Report%20No%2027_files/image001.jpg

Photo 1: Land-Based Theodolite Tracking Survey for Chinese White Dolphin (CWD) at Sha Chau Conducted by ET

Photo 2: Sample Collection for Water Quality Monitoring Conducted by ET

Photo 3: Environmental Management Meeting for EM&A Review with Works Contracts

 

Summary Findings of the EM&A Programme

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

One monitoring result of 1-hour TSP triggered the Action Level in the reporting period, and the corresponding investigation was conducted accordingly. The investigation findings concluded that the case was not due to the Project.

The water quality monitoring results for dissolved oxygen (DO), turbidity, and total alkalinity obtained during the reporting period complied with 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 suspended solids (SS), chromium, and nickel, some of the testing results triggered the relevant Action or Limit Levels in the reporting period, and the corresponding investigations were conducted accordingly. The investigation findings concluded that the cases were not related to the Project. To conclude, the construction activities in the reporting period did not introduce adverse impact to all water quality sensitive receivers.

The monthly terrestrial ecology monitoring on Sheung Sha Chau observed that HDD works were conducted at the daylighting location and there was no encroachment upon the egretry area nor any significant disturbance to ardeids at Sheung Sha Chau by the works.

The key findings of the EM&A programme during the reporting period is summarized as below:

 

 

Yes

No

Details

Analysis / Recommendation / Remedial Actions

Breach of Limit Level^

 

No breach of Limit Level was recorded.

Nil

Breach of Action Level^

 

No breach of Action Level was recorded.

Nil

Complaints Received

A complaint on the use of disqualified non-road mobile machineries (NRMM) was received on 19 Jan 2018.

Based on ET’s site inspections, it was observed that all Contractors have used NRMMs with appropriate labels.

A complaint on noise from Sha Chau works was received on 5 Feb 2018.

No observation relating to construction works and deployment of powered mechanical equipment during restricted hours was found during regular and ad-hoc site inspections.

The contractor was reminded to comply with all conditions stipulated in the Environmental Permit and Construction Noise Permit.

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 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 existing 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. 22.

1.2      Scope of this Report

This is the 9th Construction Phase Quarterly EM&A Report for the Project which summarizes the key findings of the EM&A programme during the reporting period from 1 January 2018 to 31 March 2018.

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

Keith Chau

2972 1721

Independent Environmental Checker (IEC)

(AECOM Asia Company Limited)

Independent Environmental Checker

Jackel Law

3922 9376

 

Deputy Independent Environmental Checker

Roy Man

3922 9376

 

 

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

Sandra Lo

6329 3513

Contract 3202 DCM (Package 2)

(Samsung-BuildKing Joint Venture)

Project Manager

Ilkwon Nam

9643 3117

Environmental Officer

Dickson Mak

9525 8408

Contract 3203 DCM (Package 3)

(Sambo E&C Co., Ltd.)

Project Manager

Eric Kan

9014 6758

Environmental Officer

David Hung

9765 6151

Contract 3204 DCM (Package 4)

(CRBC-SAMBO Joint Venture)

Project Manager

Kyung-Sik Yoo

9683 8697

Environmental Officer

Kanny Cho

6799 8226

Contract 3205 DCM (Package 5)

(Bachy Soletanche - Sambo Joint Venture)

Deputy Project Director

Min Park

9683 0765

Environmental Officer

Margaret Chung

9130 3696

 

 

Reclamation Works:

 

 

 

Party

Position

Name

Telephone

Contract 3206

(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)

Project Manager

Kin Hang Chung

9412 1386

 

Terminal 2 Expansion Works:

Party

Position

Name

Telephone

Contract 3501 Antenna Farm and Sewage Pumping Station

(Build King Construction Ltd.)

Project Manager

Raymond Au

6985 8860

Environmental Officer

Edward Tam

9287 8270

Contract 3502 Terminal 2 APM Depot Modification Works

(Build King Construction Ltd.)

Project Manager

Kivin Cheng

9380 3635

Environmental Officer

Chun Pong Chan

9187 7118

Contract 3503 Terminal 2 Foundation and Substructure Works

(Leighton – Chun Wo Joint Venture)

Construction Manager

Stephen O’Donoghue

9732 6787

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

 

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, laying of sand blanket, seawall construction, and prefabricated vertical drain (PVD) installation. Land-side works included horizontal directional drilling (HDD) works, site establishment, site office construction, road and drainage works, cable ducting, demolition and modification of existing facilities, concrete removal works, piling, and excavation works.

The locations of the works areas are presented in Figure 1.1 to Figure 1.2.

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

The CAR for Golf Course was submitted to EPD.

Terrestrial Ecology

 

 

Pre-construction Egretry Survey Plan

Once per month in the breeding season between April and July, prior to the commencement of HDD drilling works.

The Egretry Survey Plan was submitted and approved by EPD under EP Condition 2.14.

Ecological Monitoring

Monthly monitoring during the HDD construction works period from August to March.

On-going

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

On-going

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

 

 

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, terrestrial ecology, landscape and 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 briefings, environmental trainings, and regular environmental management meetings were conducted during the reporting period which are summarized as below:

    Three dolphin observer trainings provided by ET;

    Seven skipper trainings provided by ET;

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

    One environmental briefing on environmental compliance and construction waste management provided by EPD and AAHK; and

    26 occasions of environmental management meetings on EM&A matters.

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 summarized in Table 2.2 and the graphical plot is presented in Appendix C.

Table 2.2: Percentage Compliance of Air Quality Monitoring Results

 

AR1A

AR2

Jan 2018

100.0%

94.4%

Feb 2018

100.0%

100.0%

Mar 2018

100.0%

100.0%

Overall

100.0%

98.0%

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

One monitoring result of 1-hour TSP at AR2 triggered the Action Level on 8 January 2018. Actions were taken accordingly based on the established Event and Action Plan as presented in the Manual. Details of the investigation findings are presented in Construction Phase Monthly EM&A Report No. 25, which concluded that the case was not related to the Project.

General meteorological conditions throughout the impact monitoring period were recorded and summarized in Table 2.3.

Table 2.3: General Meteorological Condition During Impact Air Quality Monitoring

 

Weather

Wind Direction

Jan 2018

Sunny to Rainy

Northeast or East

Feb 2018

Sunny to Cloudy

North or East

Mar 2018

Sunny to Fine

South or Southwest

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 works of the Project.

2.2      Noise Monitoring

Impact noise monitoring was conducted at five 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 Results

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)

NM3A

Site Office

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) Reduced to 70dB(A) for school and 65dB(A) during school examination periods at NM4.

2.2.2      Summary of Monitoring Results

The noise monitoring results in the reporting period are summarized in Table 2.5 and the graphical plot is presented in Appendix C.

Table 2.5: Impact Noise Monitoring Results

 

NM1A

NM3A

NM4

NM5

NM6

Jan 2018

100.0%

100.0%

100.0%

100.0%

100.0%

Feb 2018

100.0%

100.0%

100.0%

100.0%

100.0%

Mar 2018

100.0%

100.0%

100.0%

100.0%

100.0%

Overall

100.0%

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 Level by the total number of monitoring results.

The monitoring results complied with the corresponding Action and Limit Levels at all monitoring stations in the reporting period.

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 construction noise impact monitoring were road traffic at NM1A, student activities, aircraft and helicopter noise at NM4, and aircraft and helicopter noise at NM3A, 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 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 22 water quality monitoring stations, comprising 12 impact (IM) stations, 7 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 2.6 describes the details of the monitoring stations. Figure 2.2 shows the locations of the monitoring stations.

Table 2.6: Monitoring Locations and Parameters for Impact Water Quality Monitoring

Monitoring Stations

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

806458

818351

IM2

Impact Station

806193

818852

IM3

Impact Station

806019

819411

IM4

Impact Station

805039

819570

IM5

Impact Station

804924

820564

IM6

Impact Station

805828

821060

IM7

Impact Station

806835

821349

IM8

Impact Station

807838

821695

IM9

Impact Station

808811

822094

 

IM10

Impact Station

809838

822240

IM11

Impact Station

810545

821501

IM12

Impact Station

811519

821162

SR1(1)

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

812586

820069

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

Tai Ho Bay, Near Tai Ho Stream SSSI

814663

817899

SR7

Ma Wan Fish Culture Zone (FCZ)

823742

823636

SR8(4)

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

811418

(from July 2017 onwards)

820246

Notes:

(1)    The seawater intakes of SR1 for the future HKBCF is not yet in operation, hence no water quality impact monitoring was conducted at this station. The future permanent location for SR1 during impact monitoring is subject to finalisation after the HKBCF seawater is commissioned.

(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)    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 2.7. The control and IM stations during flood tide and ebb tide for general water quality monitoring and regular DCM monitoring are presented in Table 2.8.

Table 2.7: 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 SR1& 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 SR1

 

 

 

SS (mg/l)

To be determined prior to its commissioning

To be determined prior to its commissioning

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 2.8: 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, SR8

Ebb Tide

 

C1

SR4A, SR5A, SR6

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 complying with their corresponding Action and Limit Levels in the reporting period are presented in Table 2.9.

Table 2.9: Percentage of Monitoring Results Complying with Action and Limit Levels

 

General Water Quality Monitoring

Regular DCM Monitoring

DO

(Surface and Middle)

DO

(Bottom)

SS

Turbidity

Alkalinity

Chromium

Nickel

Jan 2018

100.0%

100.0%

99.8%

100.0%

100.0%

100.0%

100.0%

Feb 2018

100.0%

100.0%

98.4%

100.0%

100.0%

99.0%

99.7%

Mar 2018

100.0%

100.0%

97.3%

100.0%

100.0%

100.0%

99.7%

Overall

100.0%

100.0%

98.5%

100.0%

100.0%

99.7%

99.8%

Note: The percentages are calculated by dividing the number of depth-averaged results complying with their corresponding Action and Limit Level by the total number of depth-averaged results.

The monitoring results for DO, turbidity, and total alkalinity obtained in the reporting period complied with 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 SS, chromium, and nickel, some of the testing results triggered the relevant Action or Limit Levels in the reporting period, and the corresponding investigations were conducted accordingly.

Summaries of results triggering Action or Limit Level for SS, chromium, and nickel are presented in Table 2.8 to Table 2.14. Details of the investigation findings are presented in Construction Phase Monthly EM&A Report No. 25, 26, and 27, which concluded that all results triggering the Action or Limit Level were not related to the Project.

Table 2.10: Summary of SS 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

SR7

SR8

04/01/2018

 

 

 

 

 

 

 

 

 

 

D

 

 

 

 

 

 

 

 

01/02/2018

 

 

 

D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

03/02/2018

 

 

D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

17/03/2018

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20/03/2018

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No. of result triggering Action or Limit Level

0

0

1

1

1

2

1

0

0

0

1

0

0

0

0

0

0

0

0

Table 2.11: Summary of SS Results Triggering Action or Limit Level (Mid-Flood Tide)

IM1

IM2

IM3

IM4

IM5

IM6

IM7

IM8

IM9

IM10

IM11

IM12

SR3

SR4A

SR5A

SR6

SR7

SR8

01/02/2018

 

 

 

 

D

 

 

 

 

 

 

 

 

 

 

 

 

 

03/02/2018

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

06/02/2018

 

 

 

 

 

 

 

 

 

 

 

 

D

 

 

 

 

 

03/03/2018

 

 

 

 

D

D

D

 

 

 

 

 

 

 

 

 

 

 

06/03/2018

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20/03/2018

 

 

 

 

D

D

D

D

D

 

 

 

 

 

 

 

 

 

No. of result triggering Action or Limit Level

0

0

2

2

3

2

2

1

1

0

1

0

1

0

0

0

0

0

Table 2.12: Summary of Chromium Results Triggering Action or Limit Level (Mid-Ebb Tide)

IM1

IM2

IM3

IM4

IM5

IM6

IM7

IM8

IM9

IM10

IM11

IM12

06/02/2018

 

 

 

 

 

 

 

 

 

 

D

 

No. of result triggering Action or Limit Level

0

0

0

0

0

0

0

0

0

0

1

0

Table 2.13: Summary of Chromium Results Triggering Action or Limit Level (Mid-Flood Tide)

IM1

IM2

IM3

IM4

IM5

IM6

IM7

IM8

IM9

IM10

IM11

IM12

06/02/2018

 

 

 

 

 

 

 

D

D

 

 

 

No. of result triggering Action or Limit Level

0

0

0

0

0

0

0

1

1

0

0

0

Table 2.14: Summary of Nickel Results Triggering Action or Limit Level (Mid-Flood Tide)

IM1

IM2

IM3

IM4

IM5

IM6

IM7

IM8

IM9

IM10

IM11

IM12

20/02/2018

 

 

 

 

 

 

 

 

D

 

 

 

29/03/2018

 

 

 

 

 

 

 

 

D

 

 

 

No. of result triggering Action or Limit Level

0

0

0

0

0

0

0

0

2

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.

Legend:

 

Result complied with 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 complied with their corresponding Action and Limit Levels, while 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 No. 25, 26, and 27, all results 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 had been followed.

Nevertheless, the non-project related triggers have been attended to and have 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 inspection. These include maintaining the silt curtain for sand blanket laying properly and maintaining the levels of materials on barges to avoid overflow as recommended in the Manual.

2.4      Waste Monitoring

In accordance with the Manual, the 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 2.15.

Table 2.15: 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

Based on updated contractors’ information, summary of construction waste generated in the reporting period is presented in Table 2.16.

The monitoring results complied with the corresponding Action and Limit Levels in the reporting period.

Table 2.16: Summary of Construction Waste Generated in the Reporting Period

 

Excavated Material (m3)1

C&D2 Material Reused in the Project (m3)

C&D Material Disposed of as Public Fill (m3)

Chemical Waste (kg)

Chemical Waste (L)

General Refuse (tonne)3

Jan 2018

662

4,310

597

210

45,200

162

Feb 2018

739

480

1,387

225

25,000

141

Mar 2018

1,236

563

1,689

165

8,000

258

Total

2,637

5,353

3,673

600

78,200

561

Notes:

1.     The excavated materials were temporarily stored at stockpiling area and will be reused in the Project.

2.     C&D refers to Construction and Demolition.

3.     Figures are rounded off to the nearest tonne.

4.     Paper, plastics, and metals were recycled in the reporting period.

Weekly waste 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 during the reporting period.

Recommendations were provided during monitoring, including provision and maintenance of spill kits and drip trays, provision of proper storage area for general refuse and chemical waste, as well as regular segregation and removal of waste. The contractors had taken actions to implement the recommended measures.

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. Additional land-based theodolite tracking survey at the SC station and the LKC station (in total 2 tracking days and 3 tracking days per month at respective stations) were also conducted on a voluntary basis to collect supplementary information for the Project. Monitoring was fully completed in the reporting period. The vessel survey transect lines matched those proposed in the Manual and transect lines are consistent with those used in the Agriculture, Fisheries and Conservation Department (AFCD) long-term CWD monitoring programme. The transect locations of CWD monitoring by vessel line transect survey conducted from October to December 2017 are shown in Figure 2.3, whilst the land-based theodolite tracking survey stations are described in Table 2.17 and depicted in Figure 2.4. The location of the PAM device is shown in Figure 2.10.

Table 2.17: 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 2.18.

Table 2.18: 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 reporting period, six complete sets of vessel line transect surveys were conducted from January to March 2018 to cover all transects in Northeast Lantau (NEL), Northwest Lantau (NWL), Airport West (AW), West Lantau (WL) and Southwest Lantau (SWL) survey areas twice per month.

A total of around 1,368 km of survey effort was collected from these surveys, with around 91.8% 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 January to March 2018, there were in total 65 sightings of CWDs with 203 dolphins sighted (Table 2.19). Amongst the sightings of CWDs, 60 sightings with 195 dolphins were made during on-effort searches during favourable weather conditions.

When breaking down the sightings by survey areas, 23 sightings with 63 dolphins, six sightings with 22 dolphins, 28 sightings with 99 dolphins and 8 sightings with 19 dolphins were recorded in NWL, AW, WL and SWL survey areas respectively during the current reporting period. No CWD was sighted in NEL survey area.

Compared with last quarter (i.e. October to December 2017), there is an observable increase in terms of number of CWD sightings in NWL (increased by around 77%) although the number of dolphins remains similar. In AW transects, there are significant increases in terms of both number of sighting and number of dolphins when compared with last reporting quarter (i.e. 200% and 120% increases respectively). The number of sightings and the number of dolphins in WL increased slightly by 17% and 27% respectively compared with last reporting quarter. While in SWL, the numbers remain similar.

Compared with the same quarter of last year (i.e. January to March 2017), the total number of CWD sightings and the total number of dolphins increased by around 20% and 10% respectively. Looking at the breakdown of survey areas, it is worth noting that there are significant increases in terms of both number of sightings and number of dolphins in NWL (including AW transects) by over three times. However, the combined values of WL and SWL show another picture with declines of 23% in terms of number of sightings and 28% in terms of number of dolphins.

Table 2.19 below shows the comparison of the numbers of sightings and dolphins amongst the current reporting period, last quarter, and the same quarter of year 2017.

Table 2.19: Summary of Number of CWD Sightings and Number of Dolphins for the Same Quarter Last Year, Previous Quarter, and Current Reporting Period

 

January to March 2017

October to December 2017

January to March 2018

NEL

0 (0)

0 (0)

0 (0)

NWL

5 (16)

13 (62)

23 (63)

AW

2 (5)

2 (10)

6 (22)

WL

33 (126)

24 (78)

28 (99)

SWL

14 (38)

8 (18)

8 (19)

Total

54 (185)

47 (168)

65 (203)

Note: Values in ( ) represent number of dolphins

Distribution of CWD sightings recorded from January to March 2018 are illustrated in Figure 2.5. In NWL, CWD sightings were mostly within and around Sha Chau and Lung Kwu Chau Marine Park (SCLKCMP) as well as the southwestern part of the survey area with several sightings recorded in close vicinity to the 3RS works area. It is worth noting that one off-effort sighting of CWD with two individuals was recorded feeding just outside the eastern tip of the 3RS works area in February 2018, which is the first time that CWD was encountered at that part of the NWL survey area since the start of CWD monitoring for the 3RS Project dated back to December 2015. In WL, CWD sightings were recorded on all transects generally except the short transect which passes through Hong Kong-Zhuhai-Macao Bridge Hong Kong Link Road. The majority of the CWD sightings in WL were located at the waters near Tai O and the waters between Peaked Hill and Fan Lau. While in SWL, CWD sightings scattered throughout the survey area with three sightings recorded around Soko Islands. Details of the sighting data are presented in Appendix C.

Figure 2.5: Sightings Distribution of Chinese White Dolphins


Remarks: Please note that there are 65 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 January, February and March 2018 are summarized in Table 2.20.

In this reporting period, the monthly STG increased slightly from January to February 2018 followed by a relatively observable decline in March 2018, while the monthly ANI decreased from January 2018 to March 2018 quite significantly. Comparing with the previous reporting period, both the running quarterly STG and ANI increased slightly from 4.05 to 4.78 and from 14.75 to 15.52 respectively.

Table 2.20: Summary of Monthly and Running Quarterly STG and ANI of Chinese White Dolphin for Previous and Current Reporting Periods

 

Previous Reporting Period

Current Reporting Period

 

Oct 17

Nov 17

Dec 17

Jan 18

Feb 18

Mar 18

Monthly STG

4.54

2.07

5.33

5.10

5.38

3.84

Monthly ANI

16.02

6.82

20.77

19.94

16.15

10.33

Running Quarterly STG

5.90

4.09

4.05

4.27

5.27

4.78

Running Quarterly ANI

19.05

13.91

14.75

16.27

18.89

15.52

Note:    For detailed calculations of encounter rates STG and ANI, please refer to the Construction Phase Monthly EM&A Report No. 25, 26 and 27.

Group Size

Between January and March 2018, the group size of CWD sightings ranged from 1 to 13 dolphins. The average group size of CWDs was 3.1 dolphins per group while that of the last quarter was 3.6. Small-sized CWD sightings (1-2 dolphins) were dominant, with 37 out of 65 sightings. There were three CWD sightings with large group size (10 or more dolphins) recorded in this reporting period. One of these sightings was recorded on AW transect while others were recorded in WL survey area.

In NWL and SWL, CWD sightings with small group size were dominated in this reporting period. While in WL, the number of sightings with small group size and the number of sightings with medium group size (3-9 dolphins) were similar. 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 65 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 January to March 2018, 21 sightings of CWDs were recorded with feeding activities.  Amongst these 21 sightings, six sightings were observed in association with fishing boats – four were observed in association with operating gill netters in NWL and WL, while two sightings were observed in association with operating purse seiners in NWL and SWL. The numbers of sightings with feeding and association with fishing boats are higher when compared to the last reporting period (14 sightings involved feeding activities with three sightings observed in association with operating fishing boats in October to December 2017). Compared with the data in the same period of last year, CWD sightings with feeding activities increased by 40% but the association with operating fishing boats decreased by the same percentage (15 sightings observed with feeding activities amongst which 10 sightings were observed with operating fishing boats in January to March 2017). The sighting locations of CWDs engaged in different behaviours during the 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 January to March 2018, 10 sightings of CWDs were recorded with the presence of mother-and-calf, mother-and-unspotted juvenile and/or mother-and-spotted juvenile pairs. Six of these sightings were recorded in NWL (including AW) while others were sighted in WL. The sighting locations of mother-calf pairs are shown in Figure 2.8.

Figure 2.8: Sighting Locations of Mother-calf Pairs


Remarks: Please note that there are 10 pink circles on the map indicating the locations of the sightings with the presence of mother-and-calf, mother-and-unspotted juvenile and/or mother-and-spotted juvenile pairs. Some of them were very close to each other and therefore appear overlapped on this sighting distribution map.

Photo Identification

During January to March 2018, a total number of 83 different CWD individuals were identified altogether for 123 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 83 different CWD individuals, 30 animals (i.e. NLMM002, NLMM004, NLMM009, NLMM023, NLMM043, NLMM061, NLMM063, NLMM065, SLMM003, SLMM010, SLMM014, SLMM028, SLMM030, SLMM034, SLMM049, WLMM001, WLMM004, WLMM006, WLMM007, WLMM009, WLMM026, WLMM027, WLMM029, WLMM057, WLMM065, WLMM066, WLMM071, WLMM079, WLMM109 and WLMM111) were sighted for more than once.

Seven individuals including SLMM010, SLMM014, WLMM004, WLMM006, WLMM009, WLMM029 and WLMM057 were re-sighted in different survey areas within this reporting period. Amongst these seven animals, WLMM004, WLMM006, WLMM009, WLMM029 and WLMM057 had cross-area movement between NWL (including AW) and WL survey areas. Whilst SLMM010 and SLMM014 had cross-area movement between WL and SWL. The most frequently re-sighted individual was WLMM027 which has been re-sighted 4 times in NWL (including AW) during this reporting period. The number of CWD individuals re-sighted for more than once and the number of CWD individuals showed cross-area movement are both higher than the last reporting quarter (i.e. October to December 2017).

A summary of photo identification works is presented in Table 2.21. Representative photos of the 83 identified individuals and figures depicting the sighting locations of the aforementioned 30 re-sighted individuals recorded in this reporting period are presented Appendix C.

Table 2.21: Summary of Photo Identification

Individual ID

Date of sighting

Sighting Group No.

Area

 

Individual
ID

Date of sighting

Sighting Group No.

Area

NLMM001

12-Feb-18

4

NWL

 

SLMM055

14-Feb-18

4

WL

NLMM002

18-Jan-18

1

NWL

 

SLMM060

08-Jan-18

1

SWL

 

12-Feb-18

2

NWL

 

SLMM062

13-Feb-18

7

WL

 

22-Mar-18

1

NWL

 

WLMM001

13-Feb-18

5

WL

NLMM004

06-Feb-18

4

NWL

 

 

12-Mar-18

2

WL

 

12-Feb-18

2

NWL

 

WLMM003

13-Mar-18

3

WL

 

22-Mar-18

1

NWL

 

WLMM004

15-Jan-18

3

WL

NLMM009

12-Feb-18

2

NWL

 

 

13-Feb-18

1

AW

 

22-Mar-18

1

NWL

 

WLMM006

14-Feb-18

2

AW

NLMM010

18-Jan-18

1

NWL

 

 

 

3

WL

NLMM016

14-Feb-18

5

WL

 

WLMM007

15-Jan-18

8

WL

NLMM018

22-Mar-18

1

NWL

 

 

12-Mar-18

1

WL

NLMM021

18-Jan-18

2

NWL

 

WLMM009

14-Feb-18

2

AW

NLMM023

18-Jan-18

1

NWL

 

 

 

3

WL

 

12-Feb-18

2

NWL

 

WLMM015

15-Jan-18

3

WL

NLMM037

18-Jan-18

1

NWL

 

WLMM017

13-Feb-18

8

WL

NLMM043

12-Feb-18

2

NWL

 

WLMM018

12-Mar-18

1

WL

 

22-Mar-18

1

NWL

 

WLMM021

16-Jan-18

3

SWL

NLMM049

12-Feb-18

3

NWL

 

WLMM026

15-Jan-18

1

AW

NLMM052

06-Feb-18

3

NWL

 

 

14-Mar-18

1

NWL

NLMM055

12-Feb-18

2

NWL

 

 

 

3

NWL

NLMM057

18-Jan-18

3

NWL

 

WLMM027

15-Jan-18

1

AW

NLMM061

15-Jan-18

1

AW

 

 

18-Jan-18

4

NWL

 

18-Jan-18

3

NWL

 

 

14-Mar-18

1

NWL

 

12-Feb-18

1

NWL

 

 

 

3

NWL

NLMM062

15-Jan-18

2

WL

 

WLMM028

13-Mar-18

3

WL

NLMM063

18-Jan-18

2

NWL

 

WLMM029

14-Feb-18

2

AW

 

22-Mar-18

1

NWL

 

 

13-Mar-18

3

WL

NLMM064

06-Feb-18

1

NWL

 

WLMM043

15-Jan-18

3

WL

NLMM065

12-Feb-18

4

NWL

 

WLMM046

14-Mar-18

4

NWL

 

14-Mar-18

4

NWL

 

WLMM055

13-Feb-18

2

AW

 

 

6

NWL

 

WLMM057

14-Feb-18

2

AW

SLMM002

14-Feb-18

8

WL

 

 

 

3

WL

SLMM003

15-Jan-18

8

WL

 

WLMM060

18-Jan-18

5

NWL

 

14-Feb-18

8

WL

 

WLMM062

12-Feb-18

1

NWL

 

12-Mar-18

1

WL

 

WLMM063

13-Feb-18

1

AW

SLMM007

15-Jan-18

8

WL

 

WLMM064

15-Jan-18

2

WL

SLMM010

15-Jan-18

8

WL

 

WLMM065

18-Jan-18

3

NWL

 

17-Jan-18

7

SWL

 

 

14-Mar-18

2

NWL

SLMM012

17-Jan-18

7

SWL

 

WLMM066

15-Jan-18

1

AW

SLMM014

12-Mar-18

1

WL

 

 

18-Jan-18

3

NWL

 

 

3

SWL

 

 

14-Mar-18

2

NWL

SLMM018

17-Jan-18

5

SWL

 

WLMM071

15-Jan-18

1

AW

SLMM022

15-Jan-18

8

WL

 

 

18-Jan-18

5

NWL

SLMM023

13-Mar-18

3

WL

 

WLMM073

12-Mar-18

1

WL

SLMM025

12-Mar-18

1

WL

 

WLMM078

13-Mar-18

1

WL

SLMM027

12-Mar-18

1

WL

 

WLMM079

15-Jan-18

8

WL

SLMM028

15-Jan-18

1

AW

 

 

12-Mar-18

1

WL

 

16-Jan-18

1

AW

 

WLMM080

14-Mar-18

4

NWL

SLMM030

17-Jan-18

6

SWL

 

WLMM081

15-Jan-18

3

WL

 

 

7

SWL

 

WLMM107

13-Feb-18

5

WL

SLMM031

13-Mar-18

5

WL

 

WLMM108

15-Jan-18

3

WL

SLMM034

12-Mar-18

2

WL

 

WLMM109

15-Jan-18

3

WL

 

13-Mar-18

2

WL

 

 

 

5

WL

SLMM037

14-Feb-18

8

WL

 

 

 

7

WL

SLMM044

13-Feb-18

8

WL

 

WLMM110

15-Jan-18

3

WL

SLMM046

15-Jan-18

3

WL

 

WLMM111

15-Jan-18

3

WL

SLMM048

13-Feb-18

5

WL

 

 

 

7

WL

SLMM049

15-Jan-18

8

WL

 

WLMM112

15-Jan-18

3

WL

 

12-Mar-18

1

WL

 

WLMM113

14-Feb-18

4

WL

SLMM052

15-Jan-18

8

WL

 

WLMM114

12-Mar-18

1

WL

SLMM053

14-Feb-18

3

WL

 

 

 

 

 

2.5.2.2            Land-based Theodolite Tracking Survey

Survey Effort

During January to March 2018, a total of 15 days of land-based theodolite tracking survey effort were completed, including nine days on Lung Kwu Chau and six days on Sha Chau. In total, 31 CWD groups were tracked from the Lung Kwu Chau station while no CWD groups were tracked from the Sha Chau station, with an overall 0.34 CWD groups sighted per survey effort hour.

Information on survey effort and CWD groups sighted during land-based theodolite tracking surveys are presented in Table 2.22. Details on the survey effort and CWD groups tracked are presented in Appendix C. The first sighting locations of CWD groups tracked between January and March 2018 are shown in Figure 2.9.

Table 2.22: Summary of Survey Effort and CWD Group of Land-based Theodolite Tracking Survey

Land-based Station