Expansion of Hong Kong
International Airport into a
Three-Runway System
Construction Phase Monthly EM&A
Report No. 91
(For July 2023)
August 2023
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 (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
7.6: 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
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 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
|
|
|
|
|
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
|
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 |
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 |
(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 |
|
|
YSI ProDSS (Serial No. 17E100747) |
23 Jun 2023 |
||
|
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 |
|