Expansion of Hong Kong

International Airport into a

Three-Runway System

Construction Phase Monthly EM&A

Report No. 91

(For July 2023)

August 2023

 

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Contents

Abbreviations

Executive summary

1       Introduction

1.1      Background

1.2      Scope of this Report

1.3      Project Organisation

1.4      Summary of Construction Works

1.5      Summary of EM&A Programme Requirements

2       Air Quality Monitoring

2.1      Action and Limit Levels

2.2      Monitoring Equipment

2.3      Monitoring Methodology

2.3.1         Measuring Procedure

2.3.2         Maintenance and Calibration

2.4      Summary of Monitoring Results

2.5      Conclusion

3       Noise Monitoring

3.1      Action and Limit Levels

3.2      Monitoring Equipment

3.3      Monitoring Methodology

3.3.1         Monitoring Procedure

3.3.2         Maintenance and Calibration

3.4      Summary of Monitoring Results

3.5      Conclusion

4       Water Quality Monitoring

4.1      Action and Limit Levels

4.2      Monitoring Equipment

4.3      Monitoring Methodology

4.3.1         Measuring Procedure

4.3.2         Maintenance and Calibration

4.3.3         Laboratory Measurement / Analysis

4.4      Summary of Monitoring Results

4.5      Conclusion

5       Waste Management

5.1      Action and Limit Levels

5.2      Waste Management Status

5.3      Marine Sediment Management

6       Chinese White Dolphin Monitoring

6.1      Action and Limit Levels

6.2      CWD Monitoring Transects and Stations

6.2.1         Small Vessel Line-transect Survey

6.2.2         Land-based Theodolite Tracking Survey

6.3      CWD Monitoring Methodology

6.3.1         Small Vessel Line-transect Survey

6.3.2         Photo Identification

6.3.3         Land-based Theodolite Tracking Survey

6.4      Monitoring Results and Observations

6.4.1         Small Vessel Line-transect Survey

6.4.2         Photo Identification

6.4.3         Land-based Theodolite Tracking Survey

6.5      Progress Update on Passive Acoustic Monitoring

6.6      Site Audit for CWD-related Mitigation Measures

6.7      Timing of reporting CWD Monitoring Results

6.8      Summary of CWD Monitoring

7       Environmental Site Inspection and Audit

7.1      Environmental Site Inspection

7.2      Landscape and Visual Mitigation Measures

7.3      Land Contamination Assessment

7.4      Audit of SkyPier High Speed Ferries

7.5      Audit of Construction and Associated Vessels

7.6      Implementation of Dolphin Exclusion Zone

7.7      Status of Submissions under Environmental Permits

7.8      Compliance with Other Statutory Environmental Requirements

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

7.9.1         Complaints

7.9.2         Notifications of Summons or Status of Prosecution

7.9.3         Cumulative Statistics

8       Future Key Issues and Other EIA & EM&A Issues

8.1      Construction Programme for the Coming Reporting Period

8.2      Key Environmental Issues for the Coming Reporting Period

8.3      Monitoring Schedule for the Coming Reporting Period

8.4      Review of the Key Assumptions Adopted in the EIA Report

9       Conclusion and Recommendation

 

Tables

Table 1.1: Contact Information of Key Personnel

Table 1.2: Summary of Status of All Environmental Aspects under the Updated EM&A Manual

Table 2.1: Locations of Impact Air Quality Monitoring Stations 

Table 2.2: Action and Limit Levels of Air Quality Monitoring 

Table 2.3: Air Quality Monitoring Equipment

Table 2.4: Summary of Air Quality Monitoring Results 

Table 3.1: Locations of Impact Noise Monitoring Stations 

Table 3.2: Action and Limit Levels for Noise Monitoring 

Table 3.3: Noise Monitoring Equipment

Table 3.4: Summary of Construction Noise Monitoring Results 

Table 4.1: Monitoring Locations of Impact Water Quality Monitoring 

Table 4.2: Action and Limit Levels for General Water Quality Monitoring 

Table 4.3: The Control and Impact Stations during Flood Tide and Ebb Tide for General Water Quality Monitoring 

Table 4.4: Water Quality Monitoring Equipment

Table 4.5: Other Monitoring Equipment

Table 4.6: Laboratory Measurement/ Analysis of SS 

Table 4.7: Summary of DO (Surface and Middle) Compliance Status (Mid-Ebb Tide)

Table 4.8: Summary of DO (Bottom) Compliance Status (Mid-Ebb Tide)

Table 4.9: Summary of DO (Bottom) Compliance Status (Mid-Flood Tide)

Table 4.10: Summary of Findings from Investigation of DO Monitoring Results 

Table 5.1: Action and Limit Levels for Construction Waste 

Table 5.2: Construction Waste Statistics 

Table 6.1: Derived Values of Action and Limit Levels for Chinese White Dolphin Monitoring 

Table 6.2: Coordinates of Transect Lines in NEL, NWL, AW, WL and SWL Survey Areas 

Table 6.3: Land-based Theodolite Survey Station Details 

Table 6.4: Comparison of CWD Encounter Rates of the Whole Survey Area with Action Levels 

Table 6.5: Summary of Photo Identification 

Table 6.6: Summary of Survey Effort and CWD Group of Land-based Theodolite Tracking 

Table 7.1: Landscape and Visual – Construction Phase Audit Summary 

Table 7.2: Examples of Landscape and Visual Mitigation Measures in the Reporting Periods 

Table 7.3: Monitoring Programme for Landscape and Visual

Table 7.4: Event and Action Plan for Landscape and Visual

Table 7.5: Summary of the Number of Retained, Transplanted and To-be-transplanted Trees in the Reporting Period 

Table 7.6: Summary of the Transplanted Trees Updated in the Reporting Period 

Table 7.7: Photos of the Existing Transplanted Trees Inspection in this Reporting Month 

Table 7.8: Summary of Key Audit Findings against the SkyPier Plan 

Table 7.9: Status of Submissions under Environmental Permit

 

 

 

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 4.1

Water Quality Monitoring Stations

Figure 6.1

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

Figure 6.2

Land based Dolphin Monitoring in Baseline and Construction Phases

Figure 6.3

Sightings Distribution of Chinese White Dolphins

Figure 6.4

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

Figure 6.5

Location for Autonomous Passive Acoustic Monitoring

Figure 7.1

Duration of the SkyPier HSFs travelling through the SCZ for July 2023

 

Appendices

Appendix A

Environmental Mitigation Implementation Schedule (EMIS) for Construction Phase

Appendix B

Monitoring Schedule

Appendix C

Monitoring Results

Appendix D

Calibration Certificates

Appendix E

Status of Environmental Permits and Licences

Appendix F

Cumulative Statistics on Exceedances, Environmental Complaints, Notification of Summons and Status of Prosecutions

Appendix G

Data of SkyPier HSF Movements to/from Macau (between 1 and 31 July 2023)

 

 

 


Abbreviations

3RS

Three-Runway System

AAHK

Airport Authority Hong Kong

AECOM

AECOM Asia Company Limited

AFCD

Agriculture, Fisheries and Conservation Department

AIS

Automatic Information System

ANI

Encounter Rate of Number of Dolphins

APM

Automated People Mover

AW

Airport West

BHS

Baggage Handling System

C&D

Construction and Demolition

CAP

Contamination Assessment Plan

CAR

Contamination Assessment Report

CTCC

Construction Traffic Control Centre

CWD

Chinese White Dolphin

DCM

Deep Cement Mixing

DEZ

Dolphin Exclusion Zone

DO

Dissolved Oxygen

EIA

Environmental Impact Assessment

EM&A

Environmental Monitoring & Audit

EP

Environmental Permit

EPD

Environmental Protection Department

EPSS

Emergency Power Supply Systems

ET

Environmental Team

FCZ

Fish Culture Zone

HKBCF

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

HKIA

Hong Kong International Airport

HOKLAS

Hong Kong Laboratory Accreditation Scheme

HSF

High Speed Ferry

HVS

High Volume Sampler

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

Marine Travel Routes and Management Plan for Construction and Associated Vessel

NEL

Northeast Lantau

NWL

Northwest Lantau

PAM

Passive Acoustic Monitoring

PM

Project Manager

SC

Sha Chau

SCZ

Speed Control Zone

SCLKCMP

Sha Chau and Lung Kwu Chau Marine Park

SS

Suspended Solids

SSSI

Site of Special Scientific Interest

STG

Encounter Rate of Number of Dolphin Sightings

SWL

Southwest Lantau

T2

Terminal 2

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

The Manual

The Updated EM&A Manual

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 91st Construction Phase Monthly 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 to 31 July 2023.

Key Activities in the Reporting Period

The key activities of the Project carried out in the reporting period are located in reclamation areas and existing airport island respectively. Works in the reclamation areas included seawall construction, land improvement works and filling together with taxiways, concourse, tunnel work for Automated People Mover (APM) and Baggage Handling System (BHS) and associated works. Land-based works on existing airport island involved mainly airfield works, Terminal 2 expansion works, modification and tunnel work for APM and BHS, and preparation work for utilities, with activities include road and drainage works, cable ducting, demolition, piling, and excavation works.

EM&A Activities Conducted in the Reporting Period

The monthly 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

30

Noise monitoring

16

Water quality monitoring

13

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

2

Land-based theodolite tracking survey effort for CWD monitoring

2

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 Dolphin Exclusion Zone (DEZ) Plan, were conducted in the reporting period. Based on the 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 EM&A Activities in the Reporting Period

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Land-based Theodolite Tracking Survey for CWD conducted by ET

Noise Impact Monitoring conducted by ET in Tin Sum Village House

Checking of Wheel Washing Facilities by Contractor

Results of Impact Monitoring

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 did not trigger the corresponding Action and Limit Levels in the reporting period.

The water quality monitoring results for all parameters, except dissolved oxygen (DO), 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 were conducted for DO results triggering the relevant Action Level and the investigation findings revealed that the cases were not related to the Project. To conclude, the construction activities during the reporting period did not introduce adverse impact to all water quality sensitive receivers.

Summary of Upcoming Key Issues

Contract 3206 Main Reclamation Works

    Filling materials delivery.

Airfield Works

Contract 3302 Eastern Vehicular Tunnel Advance Works

    Construction of tunnel structure;

    Pipe and drainage diversion works;

    Utilities and backfilling works; and

    Stockpiling.

Contract 3305 Airfield Ground Lighting System

    Enhanced vehicular warning light hardware installation;

    Power supply system installation;

    Rectification work for airfield ground lighting system; and

    Cable containment installation.

Contract 3306 Observation Facility Control System Supporting Interim 2RS and 3RS

    Equipment installation;

    Structured cabling.

Contract 3308 Foreign Object Debris Detection System

    Rectification work for handover sensor system.

Contract 3310 North Runway Modification Works

    Architectural, builder's work and finishing works;

    Seawall construction;

    Construction of stormwater drainage;

    Piling works;

    Aviation fuel pipe works;

    Pipe pile works;

    Construction of box culvert; and

    Land improvement works (Transition layer and backfilling works).

Third Runway Concourse:

Contract 3403 New Integrated Airport Centres Building and Civil Works

    Architectural, builder's work and finishing works; and

    Electrical and mechanical works.

Contract 3404 Integrated Airport Control System

    System maintenance.

Contract 3405 Third Runway Concourse Foundation and Substructure Works

    Structure works;

    Marine sediment treatment works; and

    Tunnel concreting and backfilling works;

Contract 3408 Third Runway Concourse and Apron Works

    Building services and architectural, builder's work and finishing works;

    Erection works for concrete batching plant; and

    Excavation and reinforced concrete works.

Terminal 2 Expansion:

Contract 3508 Terminal 2 Expansion Works

    Bridge demolition;

    Pier and temporary road construction;

    Pump station and electrical station works; and

    Architectural, builder's work and finishing works.

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

Contract 3601 New Automated People Mover System (TRC Line)

    Guide beam installation.

Contract 3602 Existing APM System Modification Works

    Concrete plinth construction.

Contract 3603 Baggage Handling System (BHS)

    BHS installation; and

    Steel work installation.

Construction Support (Facilities):

Contract 3721 Construction Support Infrastructure Works

    Provision of backup services. 

Airport Support Infrastructure:

Contract 3801 APM and BHS Tunnels on Existing Airport Island

    Backfilling works;

    Gas main pipe laying;

    Road reinstatement works; and

    Coring works at bulkhead wall.

Contract 3802 APM and BHS Tunnels and Related Works

    Excavation and lateral supports;

    Box culvert construction;

    Tunnel construction; and

    Electrical and mechanical works.

Contract 3804 East and Landside Fire Stations

    Site setup and formation works;

    Bored pile works;

    Raft foundation and footing works; and

    Tower crane footing and erection works.

Contract 3805 New Airport District Police Operational Base

    Bored pile works; and

    Construction of temporary working platform.

Construction Support (Services / Licences):

Contract 3901A Concrete Batching Facility

    Operation of concrete batching plant and material conveyor belt.

Contract 3901B Concrete Batching Facility

    Operation of concrete batching plant and material conveyor belt.

Contract 3908 Quay Management Services

    Provision of services of site management and logistic control of 3RS quays; and

    Provision of flat top barge and vehicle delivery services between the launching point in Hong Kong and 3RS quays.

Contract 3913 Asphalt Batching Plant

    Operation of asphalt batching plant.

 

Summary Table

The following table summarises the key findings of the EM&A programme during the reporting period:

 

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

Complaint Received

 

No construction activities-related complaint was received during the reporting period.

Nil

Notification of any summons and status of prosecutions

 

No notification of summons nor prosecution was received.

Nil

Change that affect the EM&A

 

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

Nil

Note:

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

 

1        Introduction

1.1        Background

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

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

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

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

The summary of construction works programme can be referred to Section 1.4.

1.2        Scope of this Report

This is the 91st Construction Phase Monthly EM&A Report for the Project which summarises the key findings of the EM&A programme during the reporting period from 1 to 31 July 2023.

1.3        Project Organisation

The Project’s organisation structure presented in Appendix B of the Construction Phase Monthly EM&A Report No.1 remained unchanged during the reporting period. Contact details of the key personnel are presented in Table 1.1.

Table 1.1: Contact Information of Key Personnel

Party

Position

Name

Telephone

Project Manager’s Representative

(Airport Authority Hong Kong)

Principal Manager, Environmental Compliance, Sustainability

Lawrence Tsui

2183 2734

Environmental Team (ET)

(Mott MacDonald Hong Kong Limited)

Environmental Team Leader

Terence Kong

2828 5919

Deputy Environmental Team Leaders

Heidi Yu

2828 5704

Ken Wong

2828 5817

Independent Environmental Checker (IEC)

(AECOM Asia Company Limited)

Independent Environmental Checker

Roy Man

3922 9141 

Deputy Independent Environmental Checker

Jackel Law

3922 9376

 

Reclamation Works:

Party

Position

Name

Telephone

Contract 3206

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

Project Manager

Alan Mong

3763 1352 

Environmental Officer

Zhang Bin Wang

3763 1525

 

Airfield Works:

Party

Position

Name

Telephone

Contract 3302 Eastern Vehicular Tunnel Advance Works

(China Road and Bridge Corporation)

Project Manager

Dickey Yau

5699 4503

Environmental Officer

Dennis Ho

5645 0563

Contract 3305 Airfield Ground Lighting System

(ADB Safegate Hong Kong Limited)

Project Manager

Allam Al-Turk

2944 9725

Environmental Officer

Ivan Ting

9222 9490

Contract 3306 Observation Facility Control System Supporting Interim 2RS and 3RS

(Chinney Alliance Engineering Limited)

Project Director

Dennis Yam

9551 9920

Environmental Officer

Richard Liu

9216 8990

Contract 3307 Fire Training Facility

(Paul Y. Construction Company Limited)

Project Manager

Ken Tang

9640 5397

Environmental Officer

Ferddy Leung

5585 6746

Contract 3308 Foreign Object Debris Detection System

(DAS Aviation Services Group)

Project Manager

Jeffrey Yau

9873 7422

Contract 3310

North Runway Modification Works

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

Project Manager

Kingsley Chiang

9424 8437

Environmental Officer

Federick Wong

9842 2703

 

Third Runway Concourse:

Party

Position

Name

Telephone

Contract 3402 New Integrated Airport Centres Enabling Works

(Wing Hing Construction Co., Ltd.)

Project Manager

Wyman Lau

6112 9753

Health Safety Environmental Manager

Mike Leung

6625 2550

Contract 3403 New Integrated Airport Centres Building and Civil Works

(Sun Fook Kong Construction Limited)

Project Manager

Alice Leung

9220 3162

Environmental Officer

Ray Cheung

9785 1566

Contract 3404 Integrated Airport Control System

(Shun Hing Systems Integration Co., Ltd.)

Project Manager

Andy Ng

9102 2739

Safety and Environmental Manager

Josephine Chang

9383 7705

Contract 3405 Third Runway Concourse Foundation and Substructure Works

(China Road and Bridge Corporation – Bachy Soletanche Group Limited – LT Sambo Co., Ltd. Joint Venture)

Project Manager

Francis Choi

9423 3469

Environmental Officer

Jacky Lai

9028 8975

Contract 3408

Third Runway Concourse and Apron Works

(Beijing Urban Construction Group Company Limited and Chevalier (Construction) Company Limited Joint Venture)

Assistant Project Manager

Qian Zhang

5377 7976

Environmental Officer

Malcolm Leung

7073 7559

 

Terminal 2 (T2) Expansion:

Party

Position

Name

Telephone

Contract 3508 Terminal 2 Expansion Works

(Gammon Engineering & Construction Company Limited)

Project Director

Richard Ellis

6201 5637

Environmental Officer

Fanny Law

6184 4650

 

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

Party

Position

Name

Telephone

Contract 3601 New Automated People Mover System (TRC Line)

(CRRC Puzhen Bombardier Transportation Systems Limited and CRRC Nanjing Puzhen Co., Ltd. Joint Venture)

Project Manager

Hongdan Wei

158 6180 9450

Environmental Officer

H Y Yue

9185 8186

Contract 3602 Existing APM System Modification Works

(Niigata Transys Co., Ltd.)

Project Manager

Xia Bo

6586 4950

Environmental Officer

Y M Tong

5316 9801

Contract 3603 3RS Baggage Handling System

(VISH Consortium)

Project Manager

K C Ho

9272 9626

Environmental Officer

Richard Ng

9802 9577

 

Construction Support (Facilities):

Party

Position

Name

Telephone

Contract 3721 Construction Support Infrastructure Works

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

Site Agent

Thomas Lui

9011 5340

Environmental Officer

John Mak

6273 8703

Contract 3728 Minor Site Works

(Shun Yuen Construction Company Limited)

Contract Manager

C K Liu

9194 8739

Environmental Officer

Dan Leung

6856 5899

Contract 3733 Emergency Repair Service

(Wing Hing Construction Co., Ltd.)

Project Manager

 

Michael Kan

9206 0550

Safety Health Environmental Manager

Mike Leung

6625 2550

 

Airport Support Infrastructure:

Party

Position

Name

Telephone

Contract 3801 APM and BHS Tunnels on Existing Airport Island

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

Project Manager

Kingsley Chiang

9424 8437

Environmental Officer

Eunice Kwok

9243 1331

Contract 3802 APM and BHS Tunnels and Related Works

(Gammon Engineering & Construction Company Limited)

Project Director

John Adams

6111 6989

Environmental Officer*

Phoebe Ng

9869 1105

Environmental Supervisor

Yan Ng

5345 8555

Contract 3804 East and Landside Fire Stations

(Beijing Urban Construction Group Company

Limited -

Beijing Urban Construction International Company Limited - Kin Shing

(Leung's)

General Contractors Ltd

Joint Venture)

Project Manager

Mr. Zhang Xianda

4661 6818

Environmental Officer

Ms. Kimberly Wong

5542 1669

Contract 3805 New

Airport District Police Operational Base

(Chinney Construction Co., Ltd.)

Project Manager

Cheuk Wing Wai

9339 8321

Environmental Officer

Mike Li

6306 8547

* Environmental Officer of C3802 left on 24 July 2023 and was replaced by Environmental Supervisor Yan Ng.

 

Construction Support (Services / Licences):

Party

Position

Name

Telephone

Contract 3901A Concrete Batching Facility

(K. Wah Concrete Company Limited)

Project Manager

Benedict Wong

9553 2806

Environmental Officer

C P Fung

9874 2872

Contract 3901B Concrete Batching Facility

(Gammon Construction Limited)

General Manager

Gabriel Chan

2435 3260

Environmental Officer

Rex Wong

2695 6319

Contract 3908 Quay Management Services

(Gitanes – Crown Asia Joint Venture)

Project Manager

Mr. Ian Li

9750 6438

Environmental Officer

Mr. Tang Kai Fun

9406 3526

Contract 3913 Asphalt Batching Plant

(SPR Joint Venture)

Project Manager

Xie Yi Sheng

6580 6005

Environmental Officer

Kenneth Chan

9300 2182

1.4        Summary of Construction Works

The key activities of the Project carried out in the reporting period are located in reclamation areas and existing airport island respectively. Works in the reclamation areas included seawall construction and filling, together with taxiways, concourse, tunnel work for Automated People Mover (APM) and Baggage Handling System (BHS) and associated works. Land-based works on existing airport island involved mainly airfield works, Terminal 2 expansion works, modification and tunnel work for APM and BHS, and preparation work for utilities, with activities include road and drainage works, cable ducting, demolition, piling, and excavation works.

The locations of key construction activities are presented in Figure 1.1.

1.5        Summary of EM&A Programme Requirements

The status for all environmental aspects are presented in Table 1.2. The EM&A requirements remained unchanged during the reporting period.

Table 1.2: Summary of Status of 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 was 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 was 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 was reported in Baseline Water Quality Monitoring Report and submitted to EPD under EP Condition 3.4.

General Impact Water Quality Monitoring for reclamation, water jetting and field joint works

Three days per week, at mid-flood and mid-ebb tides.

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

Initial Intensive Deep Cement Mixing (DCM) Water Quality Monitoring

At least four weeks

The Initial Intensive DCM Monitoring Report was submitted and approved by EPD in accordance with the Detailed Plan on DCM.

Regular DCM Water Quality Monitoring

Three times per week until completion of DCM works.

Due to the completion of all marine-based DCM works within April 2022, regular DCM monitoring was ceased at all monitoring stations starting from 28 April 2022 and would be resumed if there are marine-based DCM works in the coming future.

Sewerage and Sewage Treatment

Methodology for carrying out annual sewage flow monitoring for concerned gravity sewer

Methodology to be prepared and submitted to EPD one year before the scheduled commencement of operation of the proposed third runway

The proposed methodology of the annual sewage flow monitoring was approved by EPD. The annual flow monitoring was started from June 2021 and completed in 2022.

Details of the routine H2S monitoring system for the sewerage system of 3RS

Details to be prepared and submitted to EPD at least one year before commencement of the operation of 3RS

The H2S monitoring proposal was accepted by EPD in Jun 2023.

Waste Management

Waste Monitoring

At least weekly

On-going

Land Contamination

Supplementary Contamination Assessment Plan (CAP)

At least 3 months before commencement of any soil remediation works.

The Supplementary CAP was submitted and approved by EPD under EP Condition 2.20.

Contamination Assessment Report (CAR) for Golf Course

CAR to be submitted for golf course

The CAR for Golf Course was submitted and accepted by EPD.

Contamination Assessment Reports (CAR) for Terminal 2 Emergency Power Supply Systems

CAR to be submitted for Terminal 2 Emergency Power Supply Systems

The CARs for Terminal 2 Emergency Power Supply Systems were submitted and accepted by EPD.

Terrestrial Ecology

Pre-construction Egretry Survey Plan

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

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

Ecological Monitoring

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

The terrestrial ecological monitoring at Sheung Sha Chau was completed in January 2019.

Marine Ecology

Pre-Construction Phase Coral Dive Survey

Prior to marine construction works

The Coral Translocation Plan was submitted and approved by EPD under EP Condition 2.12.

Coral Translocation

-

The coral translocation was completed.

Post-Translocation Coral 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 & Visual

 

 

Landscape & Visual Plan

At least 3 months before the commencement of construction works on the formed land of the Project.

The Landscape & Visual Plan was submitted and approved by EPD under EP Condition 2.18

Baseline Monitoring

One-off survey within the Project site boundary prior to commencement of any construction works

The baseline landscape & visual monitoring result was reported in Baseline Monitoring Report and submitted to EPD under EP Condition 3.4.

Impact Monitoring

Weekly

On-going

Establishment Works Monitoring

Bi-monthly

On-going

Long Term Management (10 years) Monitoring

Annually

On-going

Environmental Auditing

 

 

Regular site inspection

Weekly

On-going

Marine Mammal Watching Plan (MMWP) implementation measures

Monitor and check

No Marine Mammal Watching Plan (MMWP) implementation measures during this reporting period.

Dolphin Exclusion Zone (DEZ) Plan implementation measures

Monitor and check

On-going

SkyPier High Speed Ferries (HSF) implementation measures

Monitor and check

On-going

Construction and Associated Vessels Implementation measures

Monitor and check

On-going

Silt Curtain Deployment Plan implementation measures

Monitor and check

On-going

Spill Response Plan implementation measures

Monitor and check

On-going

Complaint Hotline and Email channel

Construction phase

On-going

Environmental Log Book

Construction phase

On-going

Taking into account the construction works in this 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 the ET for checking the implementation of the required environmental mitigation measures recommended in the approved EIA Report. To promote the environmental awareness and enhance the environmental performance of the contractors, regular environmental management meetings were conducted during the reporting period, which are summarised as below:

    Seventeen environmental management meetings for EM&A review with works contracts: 5, 6, 7, 11, 13, 18, 19, 20, 21, 24, 25, 26 & 27 July 2023.

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 A.

 

2        Air Quality Monitoring

Air quality monitoring of 1-hour Total Suspended Particulates (TSP) was conducted three times every six days at two representative monitoring stations in the vicinity of air sensitive receivers in Tung Chung and villages in North Lantau in accordance with the Manual. Table 2.1 describes the details of the monitoring stations. Figure 2.1 shows the locations of the monitoring stations.

Table 2.1: Locations of Impact Air Quality Monitoring Stations

Monitoring Station

Location

AR1A

Man Tung Road Park

AR2

Village House at Tin Sum

2.1        Action and Limit Levels

In accordance with the Manual, baseline air quality monitoring of 1-hour TSP levels at the two air quality monitoring stations were established as presented in the Baseline Monitoring Report. 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 2.2.  

Table 2.2: Action and Limit Levels of Air Quality Monitoring

Monitoring Station

Action Level (mg/m3)

Limit Level (mg/m3)

AR1A

306

500

AR2

298

2.2        Monitoring Equipment

Portable direct reading dust meter was used to carry out the air quality monitoring. Details of equipment used in the reporting period are given in Table 2.3.

Table 2.3: Air Quality Monitoring Equipment

Equipment

Brand and Model                  

Last Calibration Date                  

Calibration Certificate Provided in

Portable direct reading dust meter

(Laser dust monitor)

 

SIBATA LD-3B-2

(Serial No. 296098)

16 Sep 2022

Appendix D of Monthly EM&A Report No. 83

2.3        Monitoring Methodology

2.3.1         Measuring Procedure

The measurement procedures involved in the impact air quality monitoring can be summarised as follows: 

a.   The portable direct reading dust meter was mounted on a tripod at a height of 1.2m above the ground.

b.   Prior to the measurement, the equipment was set up for 1 minute span check and 6 second background check.

c.   The one hour dust measurement was started. Site conditions and dust sources at the nearby area were recorded on a record sheet.

d.   When the measurement completed, the “Count” reading per hour was recorded for result calculation.

2.3.2         Maintenance and Calibration

The portable direct reading dust meter is calibrated every year against high volume sampler (HVS) to check the validity and accuracy of the results measured by direct reading method. The calibration record of the HVS provided in Appendix D of the Monthly EM&A Report No. 77 and the calibration certificates of portable direct reading dust meters listed in Table 2.3 are valid in the reporting period.

2.4        Summary of Monitoring Results

The air quality monitoring schedule of the reporting period is provided in Appendix B.

The air quality monitoring results in the reporting period are summarised in Table 2.4. Detailed impact monitoring results are presented in Appendix C.

Table 2.4: Summary of Air Quality Monitoring Results

Monitoring Station

1-hr TSP Concentration Range (mg/m3)

Action Level (mg/m3)

Limit Level (mg/m3)

AR1A

10 - 96

306

500

AR2

9 - 45

298

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

General meteorological conditions throughout the impact monitoring period were recorded. Wind data including wind speed and wind direction for each monitoring day were collected from the Chek Lap Kok Wind Station.

2.5        Conclusion

No dust emission source was observed at the monitoring stations during the monitoring sessions. As the sensitive receivers were far away from the construction activities, with the implementation of dust control measures, there was no adverse impact at the sensitive receivers attributable to the works of the Project.


 

3        Noise Monitoring

Noise monitoring in the form of 30-minute measurements of Leq, L10, and L90 levels was conducted once per week between 0700 and 1900 on normal weekdays at four representative monitoring stations in the vicinity of noise sensitive receivers in Tung Chung and villages in North Lantau in accordance with the Manual. Table 3.1 describes the details of the monitoring stations. Figure 2.1 shows the locations of the monitoring stations.

Table 3.1: Locations of Impact Noise Monitoring Stations

Monitoring Station

Location

Type of measurement

NM1A

Man Tung Road Park

Free field

NM2(1)

Tung Chung West Development

To be determined

NM3A(2)

Site Office

Facade

NM4

Ching Chung Hau Po Woon Primary School

Free field

NM5

Village House in Tin Sum

Free field

NM6

House No. 1, Sha Lo Wan

Free field

Notes:

(1)    As described in Section 4.3.3 of the Manual, noise monitoring at NM2 will only commence after occupation of the future Tung Chung West Development.

(2)    According to Section 4.3.3 of the Manual, the noise monitoring at NM3A was temporarily suspended starting from 1 September 2018 and would be resumed with the completion of the Tung Chung East Development.

3.1        Action and Limit Levels

In accordance with the Manual, baseline noise levels at the noise monitoring stations were established as presented in the Baseline Monitoring Report. 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 3.2.

Table 3.2: Action and Limit Levels for Noise Monitoring

Monitoring Stations

Time Period

Action Level

Limit Level, Leq(30mins) dB(A)

NM1A, NM2, NM3A, NM4, NM5 and NM6

0700-1900 hours on normal weekdays

When one documented

complaint is received from

any one of the sensitive

receivers

75dB(A)(1)

Note:

(1)    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).

3.2        Monitoring Equipment

Noise monitoring was performed using sound level meter at each designated monitoring station.  The sound level meters deployed comply with the International Electrotechnical Commission Publications 651:1979 (Type 1) and 804:1985 (Type 1) specifications. Acoustic calibrator was used to check the sound level meters by a known sound pressure level for field measurement.  Details of equipment used in the reporting period are given in Table 3.3.

Table 3.3: Noise Monitoring Equipment

Equipment

Brand and Model

Last Calibration Date

Calibration Certificate Provided in

Integrated Sound Level Meter

Rion NL-52

(Serial No. 00998505)

19 Mar 2023

Appendix D of Monthly EM&A Report No.87

Integrated Sound Level Meter

Rion NL-52

(Serial No. 01287679)

10 Oct 2022

Appendix D of Monthly EM&A Report No. 82

Acoustic Calibrator

Castle GA607 (Serial No. 040162)

19 Mar 2023

Appendix D of Monthly EM&A Report No.87

Acoustic Calibrator

Casella CEL-120 (Serial No. 2383737)

18 Jun 2023

Appendix D

3.3        Monitoring Methodology

3.3.1         Monitoring Procedure

The monitoring procedures involved in the noise monitoring can be summarised as follows: 

a.   The sound level meter was set on a tripod at least a height of 1.2m above the ground for free-field measurements at monitoring stations NM1A, NM4, NM5 and NM6. A correction of +3dB(A) was applied to the free field measurements.

b.   Façade measurements were made at the monitoring station NM3A.

c.   Parameters such as frequency weighting, time weighting and measurement time were set.

d.   Prior to and after each noise measurement, the meter was calibrated using the acoustic calibrator.  If the difference in the calibration level before and after measurement was more than 1dB(A), the measurement would be considered invalid and repeat of noise measurement would be required after re-calibration or repair of the equipment.

e.   During the monitoring period, Leq, L10 and L90 were recorded. In addition, site conditions and noise sources were recorded on a record sheet.

f.    Noise measurement results, when higher than the baseline monitoring levels, were corrected with reference to the baseline monitoring levels.

g.   Observations were recorded when high intrusive noise (e.g. dog barking, helicopter noise) was observed during the monitoring.

3.3.2         Maintenance and Calibration

The maintenance and calibration procedures are summarised below:

a.   The microphone head of the sound level meter was cleaned with soft cloth at regular intervals.

b.   The meter and calibrator were sent to the supplier or laboratory accredited under Hong Kong Laboratory Accreditation Scheme (HOKLAS) to check and calibrate at yearly intervals.

Calibration certificates of the sound level meters and acoustic calibrators used in the noise monitoring listed in Table 3.3 are valid in the reporting period.

3.4        Summary of Monitoring Results

The noise monitoring schedule of reporting period is provided in Appendix B.

The noise monitoring results in the reporting period are summarised in Table 3.4. Detailed impact monitoring results are presented in Appendix C.

Table 3.4: Summary of Construction Noise Monitoring Results

Monitoring Station

Noise Level Range, dB(A)

Leq (30mins)

Limit Level, dB(A)

Leq (30mins)

NM1A(1)

64 - 71

75

NM4(1) (3)

62 - 65

70(2)

NM5(1) (3)

65 - 66

75

NM6(1) (3)

61 - 68

75

 Notes:

(1)    +3dB(A) Façade correction included;

(2)    The limit level will be reduced to 65dB(A) during school examination periods at NM4. School examination took place on 18 July 2023 during this reporting period.

(3)    Some of the noise measurement results were higher than the baseline monitoring levels. In order to reduce the influence of non-Project related noise on the monitoring results, these measurement results were corrected with reference to the baseline monitoring results.

No complaints were received from any sensitive receiver that triggered the Action Level. All monitoring results were within the corresponding Limit Levels at all monitoring stations in the reporting period.

3.5        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 traffic noise near NM1A, school activities near NM4 and aircraft noise near NM6 during this reporting period. It is considered that the monitoring work during the reporting period was effective and there was no adverse impact attributable to the Project activities.

 

4        Water Quality Monitoring

Water quality monitoring of DO, pH, temperature, salinity, turbidity, and suspended solids (SS) was conducted three days per week, at mid-ebb and mid-flood tides, at a total of 14 water quality monitoring stations, comprising 6 impact (IM) stations, 5 sensitive receiver (SR) stations and 3 control (C) stations in the vicinity of 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 impact from the Project before it could become apparent at sensitive receivers (represented by the SR stations). Table 4.1 describes the details of the monitoring stations. Figure 4.1 shows the locations of the monitoring stations.

Table 4.1: Monitoring Locations of Impact Water Quality Monitoring

Monitoring Station

Description

Coordinates

Parameters

 

 

Easting

Northing

 

C1

Control Station

804247

815620

General Parameters

DO, pH, Temperature, Salinity, Turbidity, SS

 

C2

Control Station

806945

825682

C3(2)

Control Station

817803

822109

IM1(4)

Impact Station

806458

818351

IM2(4)

Impact Station

806236

819183

IM7(4)

Impact Station

806835

821349

IM10(4)

Impact Station

809838

822240

IM11(4)

Impact Station

810545

821501

IM12(4)

Impact Station

811519

821162

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

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

814166

821463

General Parameters

DO, pH, Temperature, Salinity, Turbidity, SS

 

SR3

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

807571

822147

General Parameters

DO, pH, Temperature, Salinity, Turbidity, SS

 

SR4A

Sha Lo Wan

807810

817189

SR8(3)

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. To better reflect the water quality in the immediate vicinity of the intake, the monitoring location of SR1A has been shifted closer to the intake starting from 5 January 2019.

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

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

(4)    With the seawall completion and removal of enhanced open sea silt curtains, these monitoring stations were relocated back to their original locations. For IM2, there was minor adjustment of the monitoring location.

4.1        Action and Limit Levels

In accordance with the Manual, baseline water quality levels at the representative water quality monitoring stations were established as presented in the Baseline Water Quality Monitoring Report. The Action and Limit Levels of general water quality monitoring stipulated in the EM&A programme for triggering the relevant investigation and follow-up procedures under the programme are provided in Table 4.2. The control and impact stations during ebb tide and flood tide for general water quality monitoring are presented in Table 4.3.

Table 4.2: Action and Limit Levels for General Water Quality Monitoring

Parameters

Action Level (AL)

Limit Level (LL)

Action and Limit Levels for general water quality monitoring

(excluding SR1A & SR8)

General Water Quality Monitoring

DO in mg/l (Surface, Middle & Bottom)

Surface and Middle

4.5mg/l

Surface and Middle

4.1mg/l

Bottom

3.4mg/l

Bottom

2.7mg/l

Suspended Solids (SS) in mg/l

23

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

37

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

Turbidity in NTU

22.6

36.1

Action and Limit Levels SR1A

 

 

 

SS (mg/l))

33

 

42

 

Action and Limit Levels SR8

 

 

 

 

SS (mg/l)

52

 

60

 

Notes:

(1)    For DO measurement, non-compliance occurs when monitoring result is lower than the limits.

(2)    For parameters other than DO, non-compliance of water quality results when monitoring results is higher than the limits.

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

Table 4.3: The Control and Impact Stations during Flood Tide and Ebb Tide for General Water Quality Monitoring

Control Station

Impact Stations

Flood Tide

 

C1

IM1, IM2, IM7, SR3

SR2(1)

IM7, IM10, IM11, IM12, SR1A, SR3, SR4A, SR8

Ebb Tide

 

C1

SR4A

C2

IM1, IM2, IM7, IM10, IM11, IM12, SR1A, SR2, SR3, SR8

Note:

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

4.2        Monitoring Equipment

Table 4.4 summarises the equipment used in the reporting period for monitoring of specific water quality parameters under the water quality monitoring programme.

Table 4.4: Water Quality Monitoring Equipment

Equipment

Brand and Model

Last Calibration Date

Calibration Certificate Provided in

Multifunctional Meter (measurement of DO, pH, temperature, salinity and turbidity)

YSI ProDSS (Serial No. 15M100005)

23 Jun 2023

Appendix D

YSI ProDSS (Serial No. 17E100747)

23 Jun 2023

Appendix D

YSI ProDSS (Serial No. 16H104233)

2 Jun 2023

Appendix D of Monthly EM&A Report No. 90

YSI ProDSS (Serial No. 21K101468)

2 Jun 2023

Appendix D of Monthly EM&A Report No. 90

Other equipment used as part of the impact water quality monitoring programme are listed in Table 4.5.

Table 4.5: Other Monitoring Equipment

Equipment

Brand and Model

Water Sampler

Van Dorn Water Sampler

Positioning Device (measurement of GPS)

Garmin eTrex Vista HCx

Current Meter (measurement of current speed and direction, and water depth)

Sontek HydroSurveyor

4.3        Monitoring Methodology

4.3.1         Measuring Procedure

Water quality monitoring samples were taken at three depths (at 1m below surface, at mid-depth, and at 1m above bottom) for locations with water depth >6m. For locations with water depth between 3m and 6m, water samples were taken at two depths (surface and bottom). For locations with water depth <3m, only the mid-depth was taken. Duplicate water samples were taken and analysed.

The water samples for all monitoring parameters were collected, stored, preserved and analysed according to the Standard Methods, APHA 22nd ed. and/or other methods as agreed by the EPD. In-situ measurements at monitoring locations including temperature, pH, DO, turbidity, salinity, and water depth were collected by equipment listed in Table 4.4 and Table 4.5. Water samples for SS analysis were stored in high density polythene bottles with no preservative added, packed in ice (cooled to 4ºC without being frozen), delivered to the laboratory within 24 hours of collection.

4.3.2         Maintenance and Calibration

Calibration of In-situ Instruments

All in-situ monitoring instrument was checked, calibrated and certified by a laboratory accredited under HOKLAS before use. Responses of sensors and electrodes were checked with certified standard solutions before each use.

Wet bulb calibration for a DO meter was carried out before commencement of monitoring and after completion of all measurements each day. Calibration was not conducted at each monitoring location as daily calibration is adequate for the type of DO meter employed. A zero check in distilled water was performed with the turbidity probe at least once per monitoring day. The probe was then calibrated with a solution of known NTU. In addition, the turbidity probe was calibrated at least twice per month to establish the relationship between turbidity readings (in NTU) and levels of SS (in mg/l).

Calibration certificates of the monitoring equipment used in the reporting period are listed in Table 4.4.

4.3.3         Laboratory Measurement / Analysis

Analysis of SS have been carried out by a HOKLAS accredited laboratory, ALS Technichem (HK) Pty Ltd (Reg. No. HOKLAS 066). Sufficient water samples were collected at all the monitoring stations for carrying out the laboratory SS determination. The SS determination works were started within 24 hours after collection of the water samples. The analysis of SS have followed the standard methods summarised in Table 4.6. The QA/QC procedures for laboratory measurement/ analysis of SS were presented in Appendix F of the Construction Phase Monthly EM&A Report No.8.

Table 4.6: Laboratory Measurement/ Analysis of SS

Parameters

Instrumentation

Analytical Method

Reporting Limit

SS

Analytical Balance

APHA 2540D

2mg/l

4.4        Summary of Monitoring Results

The water quality monitoring schedule for the reporting period is provided in Appendix B.

The water quality monitoring results for all parameters, except DO, obtained during the reporting period were within their corresponding Action and Limit Levels. The detailed monitoring results are presented in Appendix C.

For DO, some of the testing results triggered the corresponding Action Level, and investigations were conducted accordingly.

Table 4.7 to Table 4.9 present the summary of the DO compliance status at IM and SR stations during mid-ebb and mid-flood tides for the reporting period.

Table 4.7: Summary of DO (Surface and Middle) Compliance Status (Mid-Ebb Tide)

 

IM1

IM2

IM7

IM10

IM11

IM12

SR2

SR3

SR4A

01-07-23

 

 

 

 

 

 

 

 

 

04-07-23

 

D

 

 

 

 

 

 

 

06-07-23

 

 

 

 

 

 

 

 

 

08-07-23

 

 

 

 

 

 

 

 

 

11-07-23

 

 

 

 

 

 

 

 

 

13-07-23

 

 

 

 

 

 

 

 

 

15-07-23

 

 

 

 

 

 

 

 

 

18-07-23

 

 

 

 

 

 

 

 

 

20-07-23

 

 

 

 

 

 

 

 

 

22-07-23

 

 

 

 

 

 

 

 

 

25-07-23

 

 

 

 

 

 

 

 

 

27-07-23

 

 

 

 

 

 

 

 

 

29-07-23

 

 

 

 

 

 

 

 

 

No. of result triggering Action or Limit Level

0

1

0

0

0

0

0

0

0

Table 4.8: Summary of DO (Bottom) Compliance Status (Mid-Ebb Tide)

 

IM1

IM2

IM7

IM10

IM11

IM12

SR2

SR3

SR4A

01-07-23

 

 

 

 

 

 

 

 

 

04-07-23

D

D

 

 

 

 

 

 

 

06-07-23

 

 

 

 

 

 

 

 

 

08-07-23

 

 

 

 

 

 

 

 

 

11-07-23

 

 

 

 

 

 

 

 

 

13-07-23

 

 

 

 

 

 

 

 

 

15-07-23

 

 

 

 

 

 

 

 

 

18-07-23

 

 

 

 

 

 

 

 

 

20-07-23

 

 

 

 

 

 

 

 

 

22-07-23