Contents
1.4 Summary of Construction Works
1.5 Summary of EM&A Programme Requirements
2.3.2 Maintenance and Calibration
2.4 Summary of Monitoring Results
3.3.2 Maintenance and Calibration
3.4 Summary of Monitoring Results
4.3.2 Maintenance and Calibration
4.3.3 Laboratory Measurement / Analysis
4.4 Summary of Monitoring Results
5.3 Marine Sediment Management
6 Chinese White Dolphin Monitoring
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
6.3.3 Land-based Theodolite Tracking Survey
6.4 Monitoring Results and Observations
6.4.1 Small Vessel Line-transect Survey
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
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
7.9.2 Notifications of Summons or Status of Prosecution
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
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 4.4: 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 (Surface and Middle) Compliance Status (Mid-Flood Tide)
Table 4.10: Summary of DO (Bottom) Compliance Status (Mid-Flood Tide)
Table 4.11: 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 7.6: Summary of the Transplanted Trees Updated in the Reporting Period
Table 7.7: Summary of Key Audit Findings against the SkyPier Plan
Table 7.8: Status of Submissions under Environmental Permit
Appendices
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 |
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 92nd 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 August 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 Terminal 2 expansion works, modification and tunnel work for APM and BHS, utilities works, road and drainage works, demolition, piling, excavation works, and 132kV cable laying 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 |
36 |
|
Noise monitoring |
20 |
|
Water quality monitoring |
14 |
|
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
|
|
|
|
|
Dust Suppression Measure conducted by Contractor |
Chemical Spill Drill conducted by Contractor |
On-site Checking of Construction Noise Permit conducted by ET |
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 and Limit 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; 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;
● Excavation lateral support;
● 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
● 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;
● Fuel pipe installation works;
● Utilities 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 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;
● Excavation;
● Pipe pile trimming; and
● Castle cable trench,
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;
● Tower crane footing and erection works; and
● Pile cap construction 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.
Utilities:
132kV Cable
● Cable trenching and cable layering;
● Duct installation and cable duct mandrill test;
● Backfilling; and
● Draw pit opening.
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 92nd 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 August 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 |
Ruby Hui |
6218 6408 |
|
|
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 |
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 |
|
|
Utilities: |
|||
|
Party |
Position |
Name |
Telephone |
|
132 kV Cable (CLP Power Hong Kong Limited / Kum Shing Construction Company Limited) |
Engineer |
Ken Fung |
6391 9087 |
|
Project Engineer |
Ivan Shek |
9822 5836 |
|
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, 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 Terminal 2 expansion works, modification and tunnel work for APM and BHS, utilities works, road and drainage works, demolition, piling, excavation works, and 132kV cable laying.
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:
● Sixteen environmental management meetings for EM&A review with works contracts: 2, 3, 9, 10, 15, 16, 17, 23, 28 & 30 August 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
|
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 |
|
Portable direct reading dust meter (Laser dust monitor) |
SIBATA LD-3B-1 (Serial No. 597337) |
04 May 2023 |
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 |
11 - 45 |
306 |
500 |
|
AR2 |
8 - 47 |
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 of Monthly EM&A Report No.91 |
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) |
63 - 66 |
75 |
|
NM4(1) (3) |
61 - 64 |
70(2) |
|
NM5(1) (3) |
61 - 65 |
75 |
|
NM6(1) (3) |
66 - 71 |
75 |
Notes:
(1) +3dB(A) Façade correction included;
(2) The limit level will be reduced to 65dB(A) during school examination periods at NM4. No school examination took place 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 |
(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 of Monthly EM&A Report No. 91 |
|
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 and/or Limit Level, and investigations were conducted accordingly.
Table 4.7 to Table 4.10 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)
Table 4.8: Summary of DO (Bottom) Compliance Status (Mid-Ebb Tide)
Table 4.9: Summary of DO (Surface and Middle) Compliance Status (Mid-Flood Tide)
Table 4.10: Summary of DO (Bottom) Compliance Status (Mid-Flood Tide)
|
Note: Detailed results are presented in Appendix C. |
|
|
Legend: |
|
|
|
The monitoring results were within the corresponding Action and Limit Levels |
|
|
Monitoring result triggered the Action Level at monitoring station located upstream of the Project based on dominant tidal flow |
|
D |
Monitoring result triggered the Action Level at monitoring station located downstream of the Project based on dominant tidal flow |
|
|
Monitoring result triggered the Limit Level at monitoring station located upstream of the Project based on dominant tidal flow |
|
D |
Monitoring 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 |
Monitoring results triggered the corresponding Action and/or Limit Level on two monitoring days.
In accordance with Event and Action Plan stipulated in the Manual, EPD was informed when the corresponding Limit Levels were triggered, while IEC and Contractors were informed when the corresponding Action and Limit Levels were triggered. Repeat in-situ measurements were conducted for monitoring stations located downstream during ebb tide on 13 and 14 August 2023 according to the requirements as stipulated in the Manual, while the repeat in-situ measurements on 1 September 2023 were cancelled due to No.8 Northwest Gale or Storm Signal was still in force.
Monitoring result triggered the corresponding Action Level at IM7, IM10 and SR3 during ebb-tide on 31 August 2023, IM11 and IM12 during flood-tide on 31 August 2023, IM1, IM2 and SR4A during flood-tide on 12 August 2023. These cases occurred at monitoring stations upstream of the Project and would unlikely be affected by the Project.
Investigations focusing on the cases which occurred at monitoring stations located downstream of the Project were carried out. Details of the Project’s marine construction activities and site observations of the concerned monitoring days were collected. Findings were summarised in Table 4.11.
Table 4.11: Summary of Findings from Investigation of DO Monitoring Results
|
|
Date |
Marine construction works nearby |
Approximate distance from marine construction works |
Status of water quality measures (if applicable) |
Construction vessels in the vicinity |
Turbidity / Silt plume observed near the monitoring station |
Action or Limit Level triggered due to Project |
|
12/08/2023 |
Seawall construction |
At least 1 km |
Implemented |
No |
No |
No |
|
|
31/08/2023 |
Nil |
N/A |
N/A |
No |
No |
No |
|
The investigations confirmed that seawall construction works were conducted with proper implementation of mitigation measures during the concerned monitoring days.
For the DO results recorded at the surface and middle water depth during mid-ebb tide (please refer to Table 4.7), the DO results at some downstream stations triggered Action Level on 12 and 31 August 2023. For IM1 and IM2, it is noted that these stations are located in the western side of the Project, which had similar previous records of widespread low DO level during wet season. Also, for IM11, IM12 and SR2, similar low DO concentrations were also recorded at the control station C2, suggesting the presence of external factors affecting the DO concentration in that area. In addition, the seawall construction works was undertaken over 1km away from the concerned monitoring stations on 12 August 2023 and there was no marine construction works on 31 August 2023. The triggers were unlikely caused by the Project.
For the DO results recorded at the bottom water depth during mid-ebb tide (please refer to Table 4.8), downstream stations including IM1, IM2 and SR4A triggered Action and/or Limit Level on 12 August 2023. For IM1 and IM2, it is noted that these stations are located in the western side of the Project, which had similar previous records of widespread low DO level during wet season. Similar low DO levels were also recorded at control station C2, and the seawall construction works were undertaken more than 1 km away from the monitoring stations, which might possibly suggest the presence of external factors affecting the DO concentration. For SR4A, it is located at a semi-embayed area, which is far away from the Project, and is also unlikely to be affected by the Project.
For the DO results recorded at the surface and middle water depth during mid-flood tide (please refer to Table 4.9), the DO results at two downstream stations IM10 and SR3, triggered Action Level on 31 August 2023. For the case at IM10, low DO concentration was also recorded at its nearest upstream station (i.e. IM11), and it is unlikely to be affected by the Project. For SR3, low DO concentration was also recorded at the control stations C1 and SR2, suggesting the presence of external factors affecting the area as a whole. Furthermore, there was no marine construction works on 31 August 2023. Therefore, the triggers were unlikely caused by the Project.
No silt plume, construction vessel, spillage incident or specific observation at outfalls were observed in the vicinity when monitoring was undertaken at the monitoring stations. Therefore, the case was considered unlikely due to the Project.
4.5
Conclusion
During the reporting period, it is noted that most of the monitoring results were within their corresponding Action and Limit Levels, while some DO measurement results triggered the corresponding Action and/or Limit Levels, investigations were conducted accordingly.
Based on the investigation findings, all results that triggered the corresponding Action and/or Limit Levels were not due to the Project. Therefore, the Project did not cause adverse impact at the water quality sensitive receivers. All required actions under the Event and Action Plan were followed. These cases appeared to be due to natural fluctuation or other sources not related to the Project.
Nevertheless, 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 as recommended in the Manual during weekly site inspection and regular environmental management meetings.
5
Waste Management
In accordance with the Manual, the waste generated from construction activities was audited once per week to determine if wastes are 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.
5.1
Action
and Limit Levels
The Action and Limit Levels of the construction waste are provided in Table 5.1.
Table 5.1: 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 |
5.2
Waste
Management Status
Weekly monitoring on all works contracts were carried out by the ET to check and monitor the implementation of proper waste management practices during the construction phase.
Recommendations made included provision and maintenance of proper chemical waste storage area, as well as handling, segregation, and regular disposal of general refuse. The contractors have taken actions to implement the recommended measures. Waste management audits were carried out by ET according to the requirement of the Waste Management Plan, Updated EM&A Manual and the implementation schedule of the waste management mitigation measures in Appendix A.
Based on updated contractors’ information, construction waste generated in the reporting period is summarised in Table 5.2. The ET and IEC have carried out site audits regularly and reviewed the trip ticket system. Dedicated areas for sorting of materials are established on site. Recyclable materials such as steel bar, metal strip, aluminium, paper and plastic are sorted on-site and transported off-site for recycling during this reporting period.
Table 5.2: Construction Waste Statistics
|
|
C&D Material Stockpiled for Reuse or Recycle(1) (m3) |
C&D Material Reused in the Project (m3) |
C&D Material Reused in other Projects (m3) |
C&D Material Transferred to Public Fill (m3) |
Chemical Waste (kg) |
Chemical Waste (l) |
General Refuse (tonne) |
|
|
Aug 2023(2) |
210 |
11,050 |
1,531 |
6,849 |
0 |
0 |
3580 |
|
|
Notes: (1) C&D refers to Construction and Demolition. (2) The data was based on the information provided by contractors up to the submission date of this Monthly EM&A Report, and might be updated in the forthcoming Monthly EM&A Report. |
||||||||
There were no complaints, non-compliance of the WMP, contract-specific WMPs, statutory and contractual requirements that triggered Action and Limit Levels in the reporting period.
5.3
Marine
Sediment Management
Marine sediment is managed according to the EIA Report, Updated EM&A Manual, Waste Management Plan and the proposal of Further Development on Treatment Level / Details and the Reuse Mode for Marine Sediment (hereinafter referred to as “Further Development Proposal”) of the Project. The sampling process, storage conditions of the excavated marine sediment, treatment process, final backfilling location as well as associated records were inspected and checked by ET and verified by IEC to ensure they were in compliance with the requirements as stipulated in the Waste Management Plan and Further Development Proposal.
Backfilling works for treated marine sediment were conducted during the reporting period. The details of the marine sediment sampling, treatment and backfilling can be referred to Annual EM&A Report No.7.
6
Chinese White Dolphin Monitoring
In accordance with the Manual, CWD monitoring by small vessel line-transect survey supplemented by land-based theodolite tracking survey and passive acoustic monitoring should be conducted during construction phase.
The small vessel line-transect survey should be conducted at a frequency of two full surveys per month, while land-based theodolite tracking survey should be conducted at a frequency of one day per month per station at Sha Chau (SC) and Lung Kwu Chau (LKC) during the construction phase as stipulated in the Manual.
6.1
Action
and Limit Levels
The Action and Limit Levels for CWD monitoring were formulated by the action response approach using the running quarterly dolphin encounter rates STG and ANI derived from the baseline monitoring data, as presented in the CWD Baseline Monitoring Report. The derived values of Action and Limit Levels for CWD monitoring were summarised in Table 6.1.
Table 6.1: Derived Values of Action and Limit Levels for Chinese White Dolphin Monitoring
|
|
NEL, NWL, AW, WL and SWL as a Whole |
|
Action Level(3) |
Running quarterly(1) STG < 1.86 & ANI < 9.35 |
|
Limit Level(3) |
Two consecutive running quarterly(2) (3-month) STG < 1.86 & ANI < 9.35 |
|
Notes: (referring to the baseline monitoring report) (1) Action Level – running quarterly encounter rates STG & ANI of this month will be calculated from the reporting period and the two preceding survey months. (2) Limit Level – two consecutive running quarters mean both the running quarterly encounter rates of the preceding month and the running quarterly encounter rates of this month. (3) Action Level and/or Limit Level will be triggered if both STG and ANI fall below the criteria. |
|
6.2
CWD
Monitoring Transects and Stations
6.2.1
Small
Vessel Line-transect Survey
Small vessel line-transect surveys were conducted along the transects covering Northeast Lantau (NEL), Northwest Lantau (NWL), Airport West (AW), West Lantau (WL) and Southwest Lantau (SWL) areas as proposed in the Manual, which are consistent with the Agriculture, Fisheries and Conservation Department (AFCD) long-term monitoring programme (except the addition of AW). The AW transect has not been previously surveyed in the AFCD programme due to the restrictions of HKIA Approach Area, nevertheless, this transect was established during the EIA of the 3RS Project and refined in the Manual with the aim to collect project specific baseline information within the HKIA Approach Area to fill the data gap that was not covered by the AFCD programme. This also provided a larger sample size for estimating the density, abundance and patterns of movements in the broader study area of the project.
The planned vessel survey transect lines following the waypoints set for construction phase monitoring as proposed in the Manual are depicted in Figure 6.1 with the waypoint coordinates of all transect lines given in Table 6.2, which are subject to on-site refinement based on the actual survey conditions and constraints.
Table 6.2: Coordinates of Transect Lines in NEL, NWL, AW, WL and SWL Survey Areas
|
Waypoint |
Easting |
Northing |
Waypoint |
Easting |
Northing |
|
NEL |
|||||
|
1S |
813525 |
820900 |
6N |
818568 |
824433 |
|
1N |
813525 |
824657 |
7S |
819532 |
821420 |
|
2S |
814556 |
818449 |
7N |
819532 |
824209 |
|
2N |
814559 |
824768 |
8S |
820451 |
822125 |
|
3S |
815542 |
818807 |
8N |
820451 |
823671 |
|
3N |
815542 |
824882 |
9S |
821504 |
822371 |
|
4S |
816506 |
819480 |
9N |
821504 |
823761 |
|
4N |
816506 |
824859 |
10S |
822513 |
823268 |
|
5S |
817537 |
820220 |
10N |
822513 |
824321 |
|
5N |
817537 |
824613 |
11S |
823477 |
823402 |
|
6S |
818568 |
820735 |
11N |
823477 |
824613 |
|
NWL |
|||||
|
1S |
804671 |
814577 |
5S |
808504 |
821735 |
|
1N |
804671 |
831404 |
5N |
808504 |
828602 |
|
2Sb |
805475 |
815457 |
6S |
809490 |
822075 |
|
2Nb |
805476 |
818571 |
6N |
809490 |
825352 |
|
2Sa |
805476 |
820770 |
7S |
810499 |
822323 |
|
2Na |
805476 |
830562 |
7N |
810499 |
824613 |
|
3S |
806464 |
821033 |
8S |
811508 |
821839 |
|
3N |
806464 |
829598 |
8N |
811508 |
824254 |
|
4S |
807518 |
821395 |
9S |
812516 |
821356 |
|
4N |
807518 |
829230 |
9N |
812516 |
824254 |
|
AW |
|||||
|
1W |
804733 |
818205 |
2W |
805045 |
816912 |
|
1E |
806708 |
818017 |
2E |
805960 |
816633 |
|
WL |
|||||
|
1W |
800600 |
805450 |
7W |
800400 |
811450 |
|
1E |
801760 |
805450 |
7E |
802400 |
811450 |
|
2W |
800300 |
806450 |
8W |
800800 |
812450 |
|
2E |
801750 |
806450 |
8E |
802900 |
812450 |
|
3W |
799600 |
807450 |
9W |
801500 |
813550 |
|
3E |
801500 |
807450 |
9E |
803120 |
813550 |
|
4W |
799400 |
808450 |
10W |
801880 |
814500 |
|
4E |
801430 |
808450 |
10E |
803700 |
814500 |
|
5W |
799500 |
809450 |
|||