Expansion of Hong Kong International Airport into a Three-Runway System |
Construction Phase Monthly EM&A Report No.55 (For July 2020) |
Contents
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 |
CNP |
Construction Noise Permit |
CWD |
Chinese White Dolphin |
DCM |
Deep Cement Mixing |
DEZ |
Dolphin Exclusion Zone |
DO |
Dissolved Oxygen |
EAR |
Ecological Acoustic Recorder |
EIA |
Environmental Impact Assessment |
EM&A |
Environmental Monitoring & Audit |
EP |
Environmental Permit |
EPD |
Environmental Protection Department |
ET |
Environmental Team |
FCZ |
Fish Culture Zone |
HDD |
Horizontal Directional Drilling |
HKBCF |
Hong Kong-Zhuhai-Macao Bridge Hong Kong Boundary Crossing Facilities |
HKIA |
Hong Kong International Airport |
HOKLAS |
Hong Kong Laboratory Accreditation Scheme |
HSF |
High Speed Ferry |
HVS |
High Volume Sampler |
IEC |
Independent Environmental Checker |
LKC |
Lung Kwu Chau |
MTCC |
Marine Traffic Control Centre |
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 |
SC |
Sha Chau |
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 55th 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 2020.
Key Activities in the Reporting Period
The key activities of the Project carried out in the reporting period included reclamation works and land-based works. Works in the reclamation areas included deep cement mixing (DCM) works, marine filling, seawall and facilities construction, together with runway and associated works. Land-based works on existing airport island involved mainly airfield works, foundation and substructure work for Terminal 2 expansion, modification and tunnel work for Automated People Mover (APM) and Baggage Handling System (BHS), and preparation work for utilities, with activities include site establishment, site office construction, road and drainage works, cable ducting, demolition, piling, and excavation works.
EM&A Activities Conducted in the Reporting Period
The 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 Marine Mammal Watching Plan (MMWP) and Dolphin Exclusion Zone (DEZ) Plan, were conducted in the reporting period. Based on information including ET’s observations, records of Maritime Surveillance System (MSS), and contractors’ site records, it is noted that environmental pollution control and mitigation measures were properly implemented and construction activities of the Project in the reporting period did not introduce adverse impacts to the sensitive receivers.
Snapshots of EM&A Activities in the Reporting Period
|
|
|
Small Vessel Line-transect Survey of CWD Conducted by ET |
Dump Truck with Mechanical Truck Cover adopted by Contractor for Delivering C&D Materials |
Enhanced Design of Wheel Washing Facility to prevent Run-off of Wash Water |
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 will be conducted according to the EM&A programme if the corresponding Action and Limit Levels are triggered. For dissolved oxygen (DO), some testing results triggered the relevant Action and Limit Levels, and the corresponding investigations were conducted accordingly. Further investigations for cases recorded between 11 and 25 June 2020 were also provided in this Construction Phase Monthly EM&A Report. The investigation findings indicated that the cases recorded in June and July 2020 were not related to the Project. To conclude, the construction activities did not introduce adverse impact to all water quality sensitive receivers.
Summary of Upcoming Key Issues
Reclamation Works:
Contract 3205 DCM works
● DCM works
Contract 3206 Main Reclamation Works
● Land-based ground improvement works;
● Seawall construction;
● Marine filling; and
● Sorting and reuse of inert waste from other 3RS contracts.
Airfield Works:
Contract 3301 North Runway Crossover Taxiway
● Cable ducting works; and
● Subgrade compaction and paving works.
Contract 3302 Eastern Vehicular Tunnel Advance Works
● Cable laying and ducting works;
● Trench excavation works;
● Backfilling and reinstatement works;
● Piling and structure works;
● King Post Construction; and
● Site establishment.
Contract 3303 Third Runway and Associated Works
● Footing and utilities work;
● Preparation works for box culvert construction;
● Bored pilling work; and
● Cable laying and ducting works.
Contract 3307 Fire Training Facility
● Site establishment
Third Runway Concourse:
Contract 3403 New Integrated Airport Centres Building and Civil Works
● Piling works and
● Installation of cable and lightning pit.
Contract 3405 Third Runway Concourse Foundation and Substructure Works
● Plant mobilisation;
● Bored pilling work; and
● Laying of pipes.
Terminal 2 Expansion:
Contract 3503 Terminal 2 Foundation and Substructure Works
● T2 re-configuration;
● Excavation works;
● Utilities, drainage, and road work; and
● Piling and structure works.
Automated People Mover (APM) and Baggage Handling System (BHS):
Contract 3601 New Automated People Mover System (TRC Line)
● Construction of site office.
Contract 3602 Existing APM System Modification Works
● Modification works at APM depot.
Construction Support (Facilities):
Contract 3721 Construction Support Infrastructure Works
● Excavation and backfilling; and
● Laying of drainage pipes and dusts.
Contract 3722 Construction Support Facilities
● Formboard erecting and concreting;
● Foundation works;
● Erection of superstructure; and
● Site Establishment.
Airport Support Infrastructure:
Contract 3801 APM and BHS Tunnels on Existing Airport Island
● Construction of box culvert;
● Cofferdam installation for shaft;
● King Post;
● Backfilling work; and
● Site clearance.
Contract 3802 APM and BHS Tunnels and Related Works
● Site establishment;
● Set up storage area and temporary haul road; and
● Ground investigation.
Construction Support (Services / Licences):
Contract 3901A/ B Concrete Batching Facility
● Erection of superstructure;
● Concreting; and
● Foundation work.
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 |
√ |
|
A complaint regarding suspected improper chemical waste disposal at the pier near Marina Garden, Tuen Mun was received on 6 Jul 2020.
|
ET requested the concerned Contractor for details on the complaint. Based on information provided by Contractor, no chemical waste has been generated from the Contractor. The case was considered closed. |
|
A complaint regarding the discharge of muddy water from the construction site which was near Aviation Fuel Supply Company (AFSC) Operation Limited premise to the surrounding surface water channel was received on 13 Jul 2020. |
ET investigated the related work contracts that carried out construction activities at or near the alleged area. Based on information provided by contractors and ET’s inspection findings, no malpractices were observed. The case was considered closed. |
|||
Notification of any summons and status of prosecutions |
|
√ |
No notification of summons or 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.
On 7 November 2014, the Environmental Impact Assessment (EIA) Report (Register No.: AEIAR-185/2014) for the “Expansion of Hong Kong International Airport into a Three-Runway System” (the Project) was approved and an Environmental Permit (EP) (Permit No.: EP-489/2014) was issued for the construction and operation of the Project.
Airport Authority Hong Kong (AAHK) commissioned Mott MacDonald Hong Kong Limited (MMHK) to undertake the role of Environmental Team (ET) for carrying out the Environmental Monitoring & Audit (EM&A) works during the construction phase of the Project in accordance with the Updated EM&A Manual (the Manual) submitted under EP Condition 3.1[1]. AECOM Asia Company Limited (AECOM) was employed by AAHK as the Independent Environmental Checker (IEC) for the Project.
The Project covers the expansion of the existing airport into a three-runway system (3RS) with key project components comprising land formation of about 650 ha and all associated facilities and infrastructure including taxiways, aprons, aircraft stands, a passenger concourse, an expanded Terminal 2, all related airside and landside works and associated ancillary and supporting facilities. The submarine aviation fuel pipelines and submarine power cables also require diversion as part of the works.
Construction of the Project is to proceed in the general order of diversion of the submarine aviation fuel pipelines, diversion of the submarine power cables, land formation, and construction of infrastructure, followed by construction of superstructures.
The updated overall phasing programme of all construction works was presented in Appendix A of the Construction Phase Monthly EM&A Report No. 7 and the contract information was presented in Appendix A of Construction Phase Monthly EM&A Report No. 54.
This is the 55th 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 2020.
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, Environment |
Lawrence Tsui |
2183 2734 |
Environmental Team (ET) (Mott MacDonald Hong Kong Limited) |
Environmental Team Leader |
Terence Kong |
2828 5919 |
|
Deputy Environmental Team Leader |
Heidi Yu |
2828 5704 |
|
Deputy Environmental Team Leader |
Daniel Sum |
2585 8495 |
Independent Environmental Checker (IEC) (AECOM Asia Company Limited) |
Independent Environmental Checker |
Jackel Law |
3922 9376
|
|
Deputy Independent Environmental Checker |
Roy Man |
3922 9141 |
Reclamation Works:
Party |
Position |
Name |
Telephone |
Contract 3205 DCM (Package 5) (Bachy Soletanche - Sambo Joint Venture) |
Deputy Project Director |
Min Park |
9683 0765 |
Environmental Officer |
William Chan |
5408 3045 |
|
Contract 3206 Main Reclamation Works (ZHEC-CCCC-CDC Joint Venture)
|
Project Manager |
Alan Mong
|
3763 1352 |
Environmental Officer |
Kwai Fung Wong |
3763 1452 |
Airfield Works:
Party |
Position |
Name |
Telephone |
Contract 3301 North Runway Crossover Taxiway (FJT-CHEC-ZHEC Joint Venture) |
Deputy Project Director |
Kin Hang Chung |
9800 0048 |
Environmental Officer |
Joe Wong |
6182 0351 |
|
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 3303 Third Runway and Associated Works (SAPR Joint Venture) |
Project Manager |
Andrew Keung |
6277 6628 |
Environmental Officer |
Max Chin |
6447 5707 |
|
Contract 3307 Fire Training Facility (Paul Y. Construction Company Limited) |
Project Manager |
Steven Meredith |
6109 1813 |
Environmental Officer |
Albert Chan |
9700 1083 |
Third Runway Concourse:
Party |
Position |
Name |
Telephone |
Contract 3402 New Integrated Airport Centres Enabling Works (Wing Hing Construction Co., Ltd.) |
Contract Manager |
Michael Kan |
9206 0550 |
Environmental Officer |
Lisa He |
5374 3418 |
|
Contract 3403 New Integrated Airport Centres Building and Civil Works (Sun Fook Kong Construction Limited) |
Project Manager |
Alice Leung |
9220 3162 |
Environmental Officer |
Alpha Chia |
9626 1114 |
|
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 |
Cecilia Choi |
9265 9352 |
Terminal 2 (T2) Expansion:
Party |
Position |
Name |
Telephone |
Contract 3503 Terminal 2 Foundation and Substructure Works (Leighton – Chun Wo Joint Venture) |
Project Manager |
Eric Wu |
3973 1718 |
Environmental Officer |
Malcolm Leung |
3973 0850 |
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 |
K F Li |
9086 1793 |
|
Contract 3602 Existing APM System Modification Works (Niigata Transys Co., Ltd.) |
Project Manager |
Kunihiro Tatecho |
9755 0351 |
Environmental Officer |
Yolanda Gao |
5399 3509 |
|
Contract 3603 3RS Baggage Handling System (VISH Consortium) |
Project Manager |
K C Ho |
9272 9626 |
Environmental Officer |
Eric Ha |
9215 3432 |
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 |
Xavier Lam |
9493 2944 |
|
Contract 3722 Western Support Area – Construction Support Facilities (Tapbo Construction Company Limited and Konwo Modular House Limited Joint Venture) |
Deputy Project Director |
Philip Kong |
9049 3161 |
Environmental Officer |
Sampson Lo |
9752 9118 |
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 |
Tony Wong |
9642 8672 |
Environmental Officer |
Federick Wong |
9842 2703 |
|
Contract 3802 APM and BHS Tunnels and Related Works (Gammon Construction Limited) |
Project Director |
John Adams |
6111 6989 |
Environmental Officer |
Andy Leung |
9489 0035 |
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) |
Senior Project Manager |
Gabriel Chan |
2435 3260 |
Environmental Officer |
Rex Wong |
2695 6319 |
The key activities of the Project carried out in the reporting period included reclamation works and land-based works. Works in the reclamation areas included DCM works, marine filling, seawall and facilities construction, together with runway and associated works. Land-based works on existing airport island involved mainly airfield works, foundation and substructure work for Terminal 2 expansion, modification and tunnel work for APM and BHS systems, and preparation work for utilities, with activities include site establishment, site office construction, road and drainage works, cable ducting, demolition of existing facilities, piling, and excavation works.
The locations of key construction activities are presented in Figure 1.1.
The status for all environmental aspects are presented in Table 1.2. The EM&A requirements remained unchanged during the reporting period and details can be referred to Table 1.2 of the Construction Phase Monthly EM&A Report No. 1.
Table 1.2: Summary of status for all environmental aspects under the Updated EM&A Manual
Parameters |
Status |
Air Quality |
|
Baseline Monitoring |
The baseline air quality monitoring result has been reported in Baseline Monitoring Report and submitted to EPD under EP Condition 3.4. |
Impact Monitoring |
On-going |
Noise |
|
Baseline Monitoring |
The baseline noise monitoring result has been reported in Baseline Monitoring Report and submitted to EPD under EP Condition 3.4. |
Impact Monitoring |
On-going |
Water Quality |
|
General Baseline Water Quality Monitoring for reclamation, water jetting and field joint works |
The baseline water quality monitoring result has been reported in Baseline Water Quality Monitoring Report and submitted to EPD under EP Condition 3.4. |
General Impact Water Quality Monitoring for reclamation, water jetting and field joint works |
On-going |
Initial Intensive Deep Cement Mixing (DCM) Water Quality Monitoring |
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 |
On-going |
Waste Management |
|
Waste Monitoring |
On-going |
Land Contamination |
|
Supplementary Contamination Assessment Plan (CAP) |
The Supplementary CAP was submitted to EPD pursuant to EP Condition 2.20. |
Contamination Assessment Report (CAR) for Golf Course |
The CAR for Golf Course was submitted to EPD. |
Contamination Assessment Report (CAR) for Terminal 2 Emergency Power Supply System No.1 (Volumes 1 and 2) |
The CAR for Terminal 2 Emergency Power Supply System No.1 (Volumes 1 and 2) was submitted to EPD. |
Terrestrial Ecology |
|
Pre-construction Egretry Survey Plan |
The Egretry Survey Plan was submitted and approved by EPD under EP Condition 2.14. |
Ecological Monitoring |
The terrestrial ecological monitoring at Sheung Sha Chau was completed in January 2019. |
Marine Ecology |
|
Pre-Construction Phase Coral Dive Survey |
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 |
The post-translocation monitoring programme according to the Coral Translocation Plan was completed in April 2018. |
Chinese White Dolphins (CWD) |
|
Vessel Survey, Land-based Theodolite Tracking and Passive Acoustic Monitoring (PAM) |
|
Baseline Monitoring |
Baseline CWD results were reported in the CWD Baseline Monitoring Report and submitted to EPD in accordance with EP Condition 3.4. |
Impact Monitoring |
On-going |
Landscape & Visual |
|
Landscape & Visual Plan |
The Landscape & Visual Plan was submitted to EPD under EP Condition 2.18 |
Baseline Monitoring |
The baseline landscape & visual monitoring result has been reported in Baseline Monitoring Report and submitted to EPD under EP Condition 3.4. |
Impact Monitoring |
On-going |
Environmental Auditing |
|
Regular site inspection |
On-going |
Marine Mammal Watching Plan (MMWP) implementation measures |
On-going |
Dolphin Exclusion Zone (DEZ) Plan implementation measures |
On-going |
SkyPier High Speed Ferries (HSF) implementation measures |
On-going |
Construction and Associated Vessels Implementation measures |
On-going |
Complaint Hotline and Email channel |
On-going |
Environmental Log Book |
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, environmental trainings and regular environmental management meetings were conducted during the reporting period, which are summarised as below:
● One skipper training session provided by ET: 8 July 2020;
● One dolphin observer training session provided by ET: 17 July 2020;
● Sixteen environmental management meetings for EM&A review with works contracts: 2, 3, 6, 10, 14, 15, 20, 22, 23, 27, 29, 30, and 31 July 2020.
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.
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 |
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 |
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) |
24 Oct 2019 |
Monthly EM&A Report No. 46, Appendix E |
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.
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 E of the Construction Phase Monthly EM&A Report No. 46, and the calibration certificates of portable direct reading dust meters listed in Table 2.3 are valid in the reporting period.
The air quality monitoring schedule involved in 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 |
7 - 34 |
306 |
500 |
AR2 |
3 - 16 |
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.
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.
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 |
Note:
(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.
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).
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) |
24 Mar 2020 |
Monthly EM&A Report No. 52, Appendix D |
Rion NL-52 (Serial No. 01287679) |
21 Jun 2020 |
Monthly EM&A Report No. 54, Appendix E |
|
Acoustic Calibrator |
Casella CEL-120/1 (Serial No. 2383737) |
21 Sep 2019 |
Monthly EM&A Report No. 45, Appendix D |
Castle GA607 (Serial No. 040162) |
4 Jul 2020 |
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 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.
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.
The noise monitoring schedule involved in the 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) |
67 - 73 |
75 |
NM4(1) |
61 - 64 |
70(2) |
NM5(1) |
53 - 61 |
75 |
NM6(1) |
66 - 68 |
75 |
Notes:
(1) +3dB(A) Façade correction included;
(2) Reduced to 65dB(A) during school examination periods at NM4. No school examination took place during this reporting period.
No complaints were received from any sensitive receiver that triggered the Action Level. All monitoring results were also within the corresponding Limit Levels at all monitoring stations in the reporting period.
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 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.
Water quality monitoring of DO, pH, temperature, salinity, turbidity, suspended solids (SS), total alkalinity, chromium, and nickel was conducted three days per week, at mid-ebb and mid-flood tides, at a total of 23 water quality monitoring stations, comprising 12 impact (IM) stations, 8 sensitive receiver (SR) stations and 3 control (C) stations in the vicinity of 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 and Parameters 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
DCM Parameters Total Alkalinity, Heavy Metals(2) |
C2 |
Control Station |
806945 |
825682 |
|
C3(3) |
Control Station |
817803 |
822109 |
|
IM1 |
Impact Station |
807132 |
817949 |
|
IM2 |
Impact Station |
806166 |
818163 |
|
IM3 |
Impact Station |
805594 |
818784 |
|
IM4 |
Impact Station |
804607 |
819725 |
|
IM5 |
Impact Station |
804867 |
820735 |
|
IM6 |
Impact Station |
805828 |
821060 |
|
IM7 |
Impact Station |
806835 |
821349 |
|
IM8 |
Impact Station |
808140 |
821830 |
|
IM9 |
Impact Station |
808811 |
822094 |
|
IM10 |
Impact Station |
809794 |
822385 |
|
IM11 |
Impact Station |
811460 |
822057 |
|
IM12 |
Impact Station |
812046 |
821459 |
|
SR1A(1) |
Hong Kong-Zhuhai-Macao Bridge Hong Kong Boundary Crossing Facilities (HKBCF) Seawater Intake for cooling |
812660 |
819977 |
General Parameters DO, pH, Temperature, Salinity, Turbidity, SS |
SR2(3) |
Planned marine park / hard corals at The Brothers / Tai Mo To
|
814166 |
821463 |
General Parameters DO, pH, Temperature, Salinity, Turbidity, SS
DCM Parameters Total Alkalinity, Heavy Metals(2)(4) |
SR3 |
Sha Chau and Lung Kwu Chau Marine Park / fishing and spawning grounds in North Lantau |
807571 |
822147 |
General Parameters DO, pH, Temperature, Salinity, Turbidity, SS
General Parameters DO, pH, Temperature, Salinity, Turbidity, SS
|
SR4A |
Sha Lo Wan |
807810 |
817189 |
|
SR5A |
San Tau Beach SSSI |
810696 |
816593 |
|
SR6A(5) |
Tai Ho Bay, Near Tai Ho Stream SSSI |
814739 |
817963 |
|
SR7 |
Ma Wan Fish Culture Zone (FCZ) |
823742 |
823636 |
|
SR8(6) |
Seawater Intake for cooling at Hong Kong International Airport (East) |
811623 |
820390 |
Notes:
(1) With the operation of HKBCF, water quality monitoring at SR1A station was commenced on 25 October 2018. 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) Details of selection criteria for the two heavy metals for regular DCM monitoring refer to the Detailed Plan on Deep Cement Mixing available on the dedicated 3RS website (http://env.threerunwaysystem.com/en/ep-submissions.html). DCM specific water quality monitoring parameters (total alkalinity and heavy metals) were only conducted at C1 to C3, SR2, and IM1 to IM12.
(3) According to the Baseline Water Quality Monitoring Report, C3 station is not adequately representative as a control station of impact/ SR stations during the flood tide. The control reference has been changed from C3 to SR2 from 1 September 2016 onwards.
(4) Total alkalinity and heavy metals results are collected at SR2 as a control station for regular DCM monitoring.
(5) As the access to SR6 was obstructed by the construction activities and temporary structures for Tung Chung New Town Extension, the monitoring location has been relocated to SR6A starting from 8 August 2019.
(6) The monitoring location for SR8 is subject to further changes due to silt curtain arrangements and the progressive relocation of this seawater intake.
In accordance with the Manual, baseline water quality levels at the above-mentioned 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 and regular DCM 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 and regular DCM monitoring are presented in Table 4.3.
Table 4.2: Action and Limit Levels for General Water Quality Monitoring and Regular DCM Monitoring
Parameters |
Action Level (AL) |
Limit Level (LL) |
|||
Action and Limit Levels for general water quality monitoring and regular DCM 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 5mg/l for Fish Culture Zone (SR7) only |
||
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 |
|||
Regular DCM Monitoring |
Total Alkalinity in ppm |
95 |
99 |
||
Representative Heavy Metals for regular DCM monitoring (Chromium) in µg/l |
0.2 |
0.2 |
|||
Representative Heavy Metals for regular DCM monitoring (Nickel) in µg/l |
3.2 |
|
3.6 |
|
|
Action and Limit Levels SR1A |
|
|
|
||
SS (mg/l)) |
33 |
|
42 |
|
|
Action and Limit Levels SR8 |
|
|
|
|
|
SS (mg/l) |
52 |
|
60 |
|
Notes:
(1) For DO measurement, 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.
(4) Details of selection criteria for the two heavy metals for regular DCM monitoring refer to the Detailed Plan on Deep Cement Mixing available on the dedicated 3RS website (http://env.threerunwaysystem.com/en/ep-submissions.html)
(5) The Action and Limit Levels for the two representative heavy metals chosen will be the same as that for the intensive DCM monitoring.
Table 4.3: The Control and Impact Stations during Flood Tide and Ebb Tide for General Water Quality Monitoring and Regular DCM Monitoring
Control Station |
Impact Stations |
Flood Tide |
|
C1 |
IM1, IM2, IM3, IM4, IM5, IM6, IM7, IM8, SR3 |
SR2(1) |
IM7, IM8, IM9, IM10, IM11, IM12, SR1A, SR3, SR4A, SR5A, SR6A, SR8 |
Ebb Tide |
|
C1 |
SR4A, SR5A, SR6A |
C2 |
IM1, IM2, IM3, IM4, IM5, IM6, IM7, IM8, IM9, IM10, IM11, IM12, SR1A, SR2, SR3, SR7, SR8 |
Note:
(1) As per findings of Baseline Water Quality Monitoring Report, the control reference has been changed from C3 to SR2 from 1 September 2016 onwards.
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
Brand and Model |
Last Calibration Date |
Calibration Certificate Provided in |
|
Multifunctional Meter (measurement of DO, pH, temperature, salinity and turbidity) |
YSI 6920V2 (Serial No. 0001C6A7) |
20 Jul 2020 |
|
YSI 6920V2 (Serial No. 00019CB2) |
21 Apr 2020 (1) |
Monthly EM&A Report No. 52, Appendix D |
|
YSI ProDSS (Serial No. 16H104234) |
10 Jun 2020 |
Monthly EM&A Report No. 54, Appendix E |
|
YSI ProDSS (Serial No. 17E100747) |
20 Jul 2020 |
||
Digital Titrator (measurement of total alkalinity) |
Titrette Bottle-top Burette, 50ml (Serial No. 10N60623) |
1 Jun 2020 |
Monthly EM&A Report No. 54, Appendix E |
Note:
(1) The monitoring equipment was not used in the reporting period after the expiry date of the calibration certificate.
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 |
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, alkalinity and water depth were collected by equipment listed in Table 4.4 and Table 4.5. Water samples for heavy metals and 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.
Calibration of In-situ Instruments
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). Accuracy check of the digital titrator was performed at least once per monitoring day.
Calibration certificates of the monitoring equipment used in the reporting period are listed in Table 4.4.
Analysis of SS and heavy metals 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 and heavy metals determination. The SS and heavy metals determination works were started within 24 hours after collection of the water samples. The analysis of SS and heavy metals have followed the standard methods summarised in Table 4.6. The QA/QC procedures for laboratory measurement/ analysis of SS and heavy metals were presented in Appendix F of the Construction Phase Monthly EM&A Report No.8.
Table 4.6: Laboratory Measurement/ Analysis of SS and Heavy Metals
Parameters |
Instrumentation |
Analytical Method |
Reporting Limit |
SS |
Analytical Balance |
APHA 2540D |
2mg/l |
Heavy Metals |
|
|
|
Chromium (Cr) |
ICP-MS |
USEPA 6020A |
0.2µg/l |
Nickel (Ni) |
ICP-MS |
USEPA 6020A |
0.2µg/l |
The water quality monitoring schedule for the reporting period is updated and 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 Limit Levels, 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 tide 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 |
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 Limit Levels on three monitoring days. In accordance with Event and Action Plan stipulated in the Manual, EPD, IEC and Contractor were informed when the corresponding Action and Limit Levels were triggered. Repeat measurement was conducted on 17, 19, 20 and 22 July 2020 as stipulated in the Manual. Some cases occurred at monitoring stations upstream of the Project during respective tide and would unlikely be affected by the Project.
Investigations focusing on the cases that occurred at monitoring stations located downstream of the Project were carried out. Details of the Project’s marine construction activities and site observations on the concerned monitoring days were collected. Findings were summarized 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 |
16/7/2020 |
DCM works |
Around 1km |
Localised and enhanced silt curtain deployed |
No |
No |
No |
18/7/2020 |
DCM works |
Around 1km |
Localised and enhanced silt curtain deployed |
No |
No |
No |
21/7/2020 |
DCM works |
Around 1km |
Localised and enhanced silt curtain deployed |
No |
No |
No |
During the reporting period, all the DO results which triggered Action or Limit Level were recorded at monitoring stations located at the western part of the 3RS marine work site. The ET checked with all contractors and confirmed that only DCM works and marine filling activities were undertaking at this area, localised and enhanced silt curtains were deployed and there was no abnormal operation. The contractors had also checked the maintenance record of all plant and equipment and confirmed that there was no spillage incident or abnormal observation.
In June, the low DO levels which triggered Action and Limit Levels occurred from 11 to 25 June 2020. Actions have been taken to repeat the monitoring in the next day. The initial findings after reviewing the results of control stations and tidal situation revealed that the cases were not much related to the construction activities. In addition, further investigation was conducted to monitor the in-situ water quality around the western part of the 3RS marine work site at locations closer to the construction activities. The monitoring results did not identify any hotspots of low DO levels. Conversely, the additional monitoring showed that the low DO levels were present over a large area, covering the western part of the 3RS marine work site. It is also noted that similar sustained low DO levels have occurred in this area in the previous wet season (i.e. June 2017 and July 2019). These findings suggest that the area of IM2 to IM4, similar to SR4A, is likely naturally susceptible to low DO levels during the wet season as a result of the combination of climatic and hydrological conditions in this area. Therefore, the cases were considered unlikely due to the Project.
In July, similar cases recorded from 16 July to 21 July 2020 with DO levels triggered Action and Limit Levels. Actions have been taken to repeat the monitoring in the next day and the results were found similar. Further investigation found that there were no abnormal activities observed, the cases were considered similar to those found in June 2020 and not due to the Project.
Detail investigation findings are presented in Appendix C.
During the reporting period, it is noted that the vast majority of monitoring results were within their corresponding Action and Limit Levels, while only a minor number of DO measurement results triggered the corresponding Action and Limit Levels, and investigations were conducted accordingly.
Based on the investigation findings, all results that triggered the corresponding Action or Limit Levels in June and July 2020 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 during weekly site inspection and regular environmental management meetings. These include maintaining mitigation measures properly for reclamation works including DCM works, marine filling, and seawall construction as recommended in the Manual.
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.
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 |
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 had 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 information provided by contractors, construction waste generated in the reporting period is summarised in Table 5.2. Proactive measures have been undertaken during the re-configuration of T2 building. The contractor has established the recycling strategy for C&D materials with proper planning and design to maximize recycling and reuse. Dedicated recyclers were employed for different kinds of recyclable materials by the contractor, and ET and IEC have carried out site visit to recyclers’ faciltities to review recycling process. Recycling materials before leaving the site are weighted by a weight bridge and monitored by CCTV system. Dedicated areas for sorting of materials are established on site. Recyclable materials such as steel, reinforcement bar, structural steel, aluminum, copper, other metals and glass are sorted on-site and transported off-site for recycling. ET and IEC has carried out site audits regularly and reviewed the trip ticket system.
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.
Along with the design and construction progress, further development on the treatment level/details and the re-use mode for marine sediment generated from 3RS Project has been conducted according to the EIA recommendation.
Table 5.2: Construction Waste Statistics
|
C&D(1) Material Stockpiled for Reuse or Recycle (m3) |
C&D Material Reused in the Project (m3) |
C&D Material Reused in other Projects (m3) |
C&D Material Transferred to Public Fill (m3) |
Chemical Waste (kg) |
Chemical Waste (l) |
General Refuse (tonne) |
|
June 2020(2)(3) |
3,903 |
*32,271 |
0 |
3,164 |
0 |
0 |
736 |
|
July 2020(2)(4) |
2,895 |
38,584 |
16 |
3,785 |
60 |
4,200 |
1,035 |
|
Notes: (1) C&D refers to Construction and Demolition. (2) Metals, paper and/or plastics were recycled in the reporting period. (3) Updated figure for the previous month is reported and marked with an asterisk (*). Updated figures for earlier months will be reported in the forthcoming Annual EM&A Report. (4) 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. |
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.
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. |
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 |
11W |
802860 |
815500 |
5E |
801300 |
809450 |
12S/11E |
803750 |
815500 |
6W |
799800 |
810450 |
12N |
803750 |
818500 |
6E |
801400 |
810450 |
|
|
|
SWL |
|||||
1S |
802494 |
803961 |
6S |
807467 |
801137 |
1N |
802494 |
806174 |
6N |
807467 |
808458 |
2S |
803489 |
803280 |
7S |
808553 |
800329 |
2N |
803489 |
806720 |
7N |
808553 |
807377 |
3S |
804484 |
802509 |
8S |
809547 |
800338 |
3N |
804484 |
807048 |
8N |
809547 |
807396 |
4S |
805478 |
802105 |
9S |
810542 |
800423 |
4N |
805478 |
807556 |
9N |
810542 |
807462 |
5S |
806473 |
801250 |
10S |
811446 |
801335 |
5N |
806473 |
808458 |
10N |
811446 |
809436 |
Land-based theodolite tracking survey stations were set up at two locations, one facing east/south/west on the southern slopes of Sha Chau (SC), and the other facing north/northeast/northwest at Lung Kwu Chau (LKC). The stations (D and E) are depicted in Figure 6.2 and shown in Table 6.3 with position coordinates, height of station and approximate distance of consistent theodolite tracking capabilities for CWD.
Table 6.3: Land-based Theodolite Survey Station Details
Stations |
Location |
Geographical Coordinates |
Station Height (m) |
Approximate Tracking Distance (km) |
D |
Sha Chau (SC) |
22° 20’ 43.5” N 113° 53’ 24.66” E |
45.66 |
2 |
E |
Lung Kwu Chau (LKC) |
22° 22’ 44.83” N 113° 53’ 0.2” E |
70.40 |
3 |
Small vessel line-transect surveys provided data for density and abundance estimation and other assessments using distance-sampling methodologies, specifically, line-transect methods.
The surveys involved small vessel line-transect data collection and have been designed to be similar to, and consistent with, previous surveys for the AFCD for their long-term monitoring of small cetaceans in Hong Kong. The survey was designed to provide systematic, quantitative measurements of density, abundance and habitat use.
As mentioned in Section 6.2.1, the transects covered NEL, NWL, AW, WL and SWL areas as proposed in the Manual, which are consistent with the AFCD long-term monitoring programme (except AW). There are two types of transect lines:
● Primary transect lines: the parallel and zigzag transect lines as shown in Figure 6.1; and
● Secondary transect lines: transect lines connecting between the primary transect lines and going around islands.
All data collected on both primary and secondary transect lines were used for analysis of sighting distribution, group size, activities including association with fishing boat, and mother-calf pairs. Only on-effort data collected under conditions of Beaufort 0-3 and visibility of approximately 1200 m or beyond were used for analysis of the CWD encounter rates.
A 15-20m vessel with a flying bridge observation platform about 4 to 5m above water level and unobstructed forward view, and a team of three to four observers were deployed to undertake the surveys. Two observers were on search effort at all times when following the transect lines with a constant speed of 7 to 8 knots (i.e. 13 to 15 km per hour), one using 7X handheld binoculars and the other using unaided eyes and recording data.
During on-effort survey periods, the survey team recorded effort data including time, position (waypoints), weather conditions (Beaufort sea state and visibility) and distance travelled in each series with assistance of a handheld GPS device. The GPS device also continuously and automatically logged data including time, position (latitude and longitude) and vessel speed throughout the entire survey.
When CWDs were seen, the survey team was taken off-effort, the dolphins were approached and photographed for photo-ID information (using a Canon 7D [or similar] camera and long 300 mm+ telephoto lens), then followed until they were lost from view. At that point, the boat returned (off effort) to the survey line at the closest point after obtaining photo records of the dolphin group and began to survey on effort again.
Focal follows of dolphins would be used for providing supplementary information only where practicable (i.e. when individual dolphins or small stable groups of dolphins with at least one member that could be readily identifiable with unaided eyes during observations and weather conditions are favourable). These would involve the boat following (at an appropriate distance to minimise disturbance) an identifiable individual dolphin for an extended period of time, and collecting detailed data on its location, behaviour, response to vessels, and associates.
CWDs can be identified by their unique features like presence of scratches, nick marks, cuts, wounds, deformities of their dorsal fin and distinguished colouration and spotting patterns.
When CWDs were observed, the survey team was taken off-effort, the dolphins were approached and photographed for photo-ID information (using a Canon 7D [or similar] camera and long 300 mm+ telephoto lens). The survey team attempted to photograph both sides of every single dolphin in the group as the colouration and spotting pattern on both sides may not be identical. The photos were taken at the highest available resolution and stored on Compact Flash memory cards for transferring into a computer.
All photos taken were initially examined to sort out those containing potentially identifiable individuals. These sorted-out images would then be examined in detail and compared to the CWD photo-identification catalogue established for 3RS Project during the baseline monitoring stage.
Land-based theodolite tracking survey obtains fine-scale information on the time of day and movement patterns of the CWDs. A digital theodolite (Sokkia/Sokkisha Model DT5 or similar equipment) with 30-power magnification and 5-s precision was used to obtain the vertical and horizontal angle of each dolphin and vessel position. Angles were converted to geographic coordinates (latitude and longitude) and data were recorded using Pythagoras software, Version 1.2. This method delivers precise positions of multiple spatially distant targets in a short period of time. The technique is fully non-invasive, and allows for time and cost-effective descriptions of dolphin habitat use patterns at all times of daylight.
Three surveyors (one theodolite operator, one computer operator, and one observer) were involved in each survey. Observers searched for dolphins using unaided eyes and handheld binoculars (7X50). Theodolite tracking sessions were initiated whenever an individual CWD or group of CWDs was located. Where possible, a distinguishable individual was selected, based on colouration, within the group. The focal individual was then continuously tracked via the theodolite, with a position recorded each time the dolphin surfaced. In case an individual could not be positively distinguished from other members, the group was tracked by recording positions based on a central point within the group whenever the CWD surfaced. Tracking continued until animals were lost from view; moved beyond the range of reliable visibility (>1-3km, depending on station height); or environmental conditions obstructed visibility (e.g., intense haze, Beaufort sea state >4, or sunset), at which time the research effort was terminated. In addition to the tracking of CWD, all vessels that moved within 2-3km of the station were tracked, with effort made to obtain at least two positions for each vessel.
Theodolite tracking included focal follows of CWD groups and vessels. Priority was given to tracking individual or groups of CWD. The survey team also attempted to track all vessels moving within 1 km of the focal CWD.
Within this reporting period, two complete sets of small vessel line-transect surveys were conducted on the 6, 8, 9, 10, 13, 20, 21 and 22 July 2020, covering all transects in NEL, NWL, AW, WL and SWL survey areas for twice.
A total of around 430.31 km of survey effort was collected from these surveys and around 91.8% of the survey effort was being conducted under favourable weather condition (i.e. Beaufort Sea State 3 or below with favourable visibility). Details of the survey effort are given in Appendix C.
Sighting Distribution
In July 2020, 28 sightings with 124 dolphins were sighted. Amongst these sightings, 27 sightings with 113 dolphins are on-effort records under favourable weather condition (i.e. Beaufort Sea State 3 or below with favourable visibility). Details of cetacean sightings are presented in Appendix C.
Distribution of all CWD sightings recorded in July 2020 is illustrated in Figure 6.3. In NWL, the only CWD sighting was recorded northeastern to Sha Chau and Lung Kwu Chau Marine Park. In WL, the majority of the CWD sightings were clustered at waters around Tai O and at the relatively offshore waters between Yi O and Fan Lau. In SWL, CWD sightings were scattered from Shui Hau to Fan Lau with the majority recorded at the offshore waters between Fan Lau and the Soko Islands. No sightings of CWD were recorded in NEL or AW survey area.
Figure 6.3: Sightings Distribution of Chinese White Dolphins
Remarks: (1) Please note that there are 28 pink circles on the map indicating the sighting locations of CWDs. Some of them were very close to each other and therefore may appear overlapped on this distribution map. (2) Marine park excludes land area and the landward boundary generally follows the high water mark along the coastline.
Encounter Rate
Two types of dolphin encounter rates were calculated based on the data from July 2020. They included the number of dolphin sightings per 100 km survey effort (STG) and total number of dolphins per 100 km survey effort (ANI) in the whole survey area (i.e. NEL, NWL, AW, WL and SWL). In the calculation of dolphin encounter rates, only survey data collected under favourable weather condition (i.e. Beaufort Sea State 3 or below with favourable visibility) were used. The formulae used for calculation of the encounter rates are shown below:
Encounter
Rate by Number of Dolphin Sightings (STG)
Encounter
Rate by Number of Dolphins (ANI)
(Notes: Only data collected under Beaufort 3 or below condition were used)
In July 2020, a total of around 394.79 km of survey effort were conducted under Beaufort Sea State 3 or below with favourable visibility, whilst a total number of 27 on-effort sightings with 113 dolphins were sighted under such condition. Calculation of the encounter rates in July 2020 are shown in Appendix C.
For the running quarter of the reporting period (i.e., from May 2020 to July 2020), a total of around 1228.86 km of survey effort were conducted under Beaufort Sea State 3 or below with favourable visibility, whilst a total number of 60 on-effort sightings and a total number of 260 dolphins from on-effort sightings were obtained under such condition. Calculation of the running quarterly encounter rates are shown in Appendix C.
The STG and ANI of CWD in the whole survey area (i.e. NEL, NWL, AW, WL and SWL) during the month of July 2020 and during the running quarter are presented in Table 6.4 below and compared with the Action Level. The running quarterly encounter rates STG and ANI remain above the Action Level, thus the Action Level is not triggered.
Table 6.4: Comparison of CWD Encounter Rates of the Whole Survey Area with Action Levels
|
Encounter Rate (STG) |
Encounter Rate (ANI) |
July 2020 |
6.84 |
28.62 |
Running Quarter from May 2020 to July 2020(1) |
4.88 |
21.16 |
Action Level |
Running quarterly(1) STG < 1.86 & ANI < 9.35 |
|
Note: (1) Running quarterly encounter rates STG & ANI were calculated from data collected in the reporting period and the two preceding survey months, i.e. the data from May 2020 to July 2020, containing six sets of transect surveys for all monitoring areas. Action Level will be triggered if both STG and ANI fall below the criteria. |
Group Size
In July 2020, 28 groups of 124 dolphins in total were sighted, and the average group size of CWDs was 4.4 dolphins per group. Sightings with small group size (i.e. 1-2 dolphins) and medium group size (i.e. 3-9 dolphins) were similar. There were two CWD sightings with large group size (i.e. 10 or more dolphins) recorded in WL.
Activities and Association with Fishing Boats
Seven sightings of CWDs were recorded engaging in feeding activities in July 2020 and one of them was observed in association with operating purse seiner in SWL.
Mother-calf Pair
In July 2020, eight CWD sightings were recorded with the presence of mother-and-unspotted calf and/or mother-and-unspotted juvenile pair.
In July 2020, a total number of 57 different CWD individuals were identified for totally 75 times. A summary of photo identification works is presented in Table 6.5. Representative photos of these individuals are given in Appendix C.
Table 6.5: Summary of Photo Identification
Individual ID |
Date of Sighting (dd-mmm-yy) |
Sighting Group No. |
Area |
|
Individual ID |
Date of Sighting (dd-mmm-yy) |
Sighting Group No. |
Area |
NLMM012 |
13-Jul-20 |
4 |
WL |
|
WLMM029 |
20-Jul-20 |
4 |
SWL |
NLMM013 |
13-Jul-20 |
5 |
WL |
|
WLMM030 |
06-Jul-20 |
2 |
WL |
NLMM019 |
20-Jul-20 |
4 |
SWL |
|
|
13-Jul-20 |
2 |
WL |
NLMM020 |
06-Jul-20 |
4 |
WL |
|
WLMM038 |
13-Jul-20 |
1 |
WL |
NLMM027 |
20-Jul-20 |
3 |
SWL |
|
WLMM043 |
13-Jul-20 |
5 |
WL |
NLMM034 |
13-Jul-20 |
1 |
WL |
|
WLMM047 |
13-Jul-20 |
7 |
WL |
NLMM037 |
20-Jul-20 |
8 |
SWL |
|
WLMM060 |
13-Jul-20 |
6 |
WL |
|
|
9 |
SWL |
|
WLMM063 |
21-Jul-20 |
3 |
SWL |
NLMM052 |
13-Jul-20 |
5 |
WL |
|
WLMM071 |
06-Jul-20 |
2 |
WL |
|
21-Jul-20 |
5 |
SWL |
|
WLMM079 |
13-Jul-20 |
7 |
WL |
NLMM060 |
06-Jul-20 |
2 |
WL |
|
|
20-Jul-20 |
5 |
SWL |
NLMM063 |
22-Jul-20 |
1 |
NWL |
|
|
21-Jul-20 |
4 |
SWL |
SLMM003 |
13-Jul-20 |
7 |
WL |
|
WLMM080 |
13-Jul-20 |
6 |
WL |
|
21-Jul-20 |
4 |
SWL |
|
WLMM085 |
13-Jul-20 |
6 |
WL |
SLMM007 |
13-Jul-20 |
6 |
WL |
|
|
|
7 |
WL |
|
|
7 |
WL |
|
WLMM086 |
13-Jul-20 |
2 |
WL |
SLMM010 |
13-Jul-20 |
6 |
WL |
|
WLMM089 |
13-Jul-20 |
5 |
WL |
SLMM012 |
21-Jul-20 |
2 |
SWL |
|
WLMM091 |
13-Jul-20 |
2 |
WL |
SLMM014 |
06-Jul-20 |
3 |
WL |
|
|
|
3 |
WL |
SLMM025 |
13-Jul-20 |
7 |
WL |
|
WLMM092 |
13-Jul-20 |
2 |
WL |
|
20-Jul-20 |
3 |
SWL |
|
|
|
3 |
WL |
SLMM027 |
21-Jul-20 |
5 |
SWL |
|
WLMM098 |
13-Jul-20 |
1 |
WL |
SLMM037 |
20-Jul-20 |
5 |
SWL |
|
WLMM102 |
06-Jul-20 |
1 |
WL |
SLMM049 |
13-Jul-20 |
7 |
WL |
|
WLMM107 |
06-Jul-20 |
2 |
WL |
|
20-Jul-20 |
5 |
SWL |
|
WLMM112 |
13-Jul-20 |
6 |
WL |
SLMM052 |
13-Jul-20 |
7 |
WL |
|
WLMM122 |
21-Jul-20 |
7 |
SWL |
SLMM060 |
20-Jul-20 |
1 |
SWL |
|
WLMM136 |
06-Jul-20 |
2 |
WL |
|
21-Jul-20 |
7 |
SWL |
|
WLMM147 |
13-Jul-20 |
7 |
WL |
SLMM062 |
20-Jul-20 |
3 |
SWL |
|
|
20-Jul-20 |
5 |
SWL |
|
21-Jul-20 |
2 |
SWL |
|
|
21-Jul-20 |
4 |
SWL |
SLMM070 |
21-Jul-20 |
2 |
SWL |
|
WLMM149 |
06-Jul-20 |
2 |
WL |
WLMM001 |
13-Jul-20 |
6 |
WL |
|
WLMM154 |
06-Jul-20 |
2 |
WL |
|
|
7 |
WL |
|
WLMM155 |
13-Jul-20 |
1 |
WL |
WLMM008 |
21-Jul-20 |
5 |
SWL |
|
WLMM156 |
13-Jul-20 |
1 |
WL |
WLMM009 |
13-Jul-20 |
6 |
WL |
|
WLMM157 |
13-Jul-20 |
7 |
WL |
|
20-Jul-20 |
4 |
SWL |
|
WLMM158 |
13-Jul-20 |
7 |
WL |
WLMM019 |
22-Jul-20 |
1 |
NWL |
|
WLMM159 |
13-Jul-20 |
7 |
WL |
WLMM028 |
20-Jul-20 |
4 |
SWL |
|
|
|
|
|
Survey Effort
Land-based theodolite tracking surveys were conducted at LKC on 15 July 2020 and at SC on 7 July 2020, with a total of two days of land-based theodolite tracking survey effort accomplished in this reporting period. No CWD group was tracked during the surveys. Information of survey effort and CWD groups are presented in Table 6.6. Details of the survey effort are presented in Appendix C.
Table 6.6: Summary of Survey Effort and CWD Group of Land-based Theodolite Tracking
Land-based Station |
|
No. of Survey Sessions |
Survey Effort (hh:mm) |
No. of CWD Groups Sighted |
CWD Group Sighting per Survey Hour |
Lung Kwu Chau |
|
1 |
6:00 |
0 |
0 |
Sha Chau |
|
1 |
6:00 |
0 |
0 |
TOTAL |
|
2 |
12:00 |
0 |
0 |
Underwater acoustic monitoring using Passive Acoustic Monitoring (PAM) should be undertaken during land formation related construction works. In this reporting period, the Ecological Acoustic Recorder (EAR) was retrieved on 22 July 2020 and subsequently redeployed and positioned at south of Sha Chau Island inside the SCLKCMP with 20% duty cycle (Figure 6.5). The EAR deployment is generally for 6 weeks prior to data retrieval for analysis. Acoustic data is reviewed to give an indication of CWDs occurrence patterns and to obtain anthropogenic noise information simultaneously. Analysis (by a specialised team of acousticians) involved manually browsing through spectrograms of every acoustic recording and logging the occurrence of dolphin signals. All potential dolphin detections will be re-played by computer as well as listened to by human ears for accurate assessment of dolphin group presence. As the period of data collection and analysis takes more than four months, PAM results could not be reported in monthly intervals but report for supplementing the annual CWD monitoring analysis.
During the reporting period, silt curtains were in place by the contractor for marine filling, in which dolphin observers were deployed by contractor in accordance with the MMWP. Overall, 2 to 4 dolphin observation stations and teams of at least two dolphin observers were deployed by the contractors for continuous monitoring of the DEZ for DCM and seawall construction works in accordance with the DEZ Plan. Trainings for the proposed dolphin observers on the implementation of MMWP and DEZ monitoring were provided by the ET prior to the aforementioned works, with a cumulative total of 696 individuals being trained and the training records kept by the ET. From the contractors’ MMWP observation records, no dolphin or other marine mammals were observed within or around the silt curtains. As for DEZ monitoring records, no dolphin or other marine mammals were observed within or around the DEZs in this reporting month. These contractors’ records were also audited by the ET during site inspection.
Audits of acoustic decoupling measures for construction vessels were carried out during weekly site inspection and the observations are summarised in Section 7.1. Audits of SkyPier high speed ferries route diversion and speed control and construction vessel management are presented in Section 7.2 and Section 7.3 respectively.
Detailed analysis of CWD monitoring results collected by small vessel line-transect survey will be provided in future quarterly reports. Detailed analysis of CWD monitoring results collected by land-based theodolite tracking survey and PAM will be provided in future annual reports after a larger sample size of data has been collected.
Monitoring of CWD was conducted with two complete sets of small vessel line-transect surveys and two days of land-based theodolite tracking survey effort as scheduled. The running quarterly encounter rates STG and ANI in the reporting period did not trigger the Action Level for CWD monitoring.
Site inspections of the construction works were carried out on a weekly basis to monitor the implementation of proper environmental pollution control and mitigation measures for the Project. The weekly site inspection schedule of the construction works is provided in Appendix B. Bi-weekly site inspections were also conducted by the IEC. Besides, ad-hoc site inspections were conducted by ET and IEC if environmental problems were identified, or subsequent to receipt of an environmental complaint, or as part of the investigation work. These site inspections provided a direct means to reinforce the specified environmental protection requirements and pollution control measures in construction sites.
During site inspections, environmental situation, status of implementation of pollution control and mitigation measures were observed. Environmental documents and site records, including waste disposal record, maintenance record of environmental equipment, and relevant environmental permit and licences, were also checked on site. Observations were recorded in the site inspection checklist and passed to the contractor together with the recommended mitigation measures where necessary in order to advise contractors on environmental improvement, awareness and on-site enhancement measures. The observations were made with reference to the following information during the site inspections:
·