Contents
1.4 Summary of Construction Works
1.5 Summary of EM&A Requirements
1.6 Status of Statutory Environmental Compliance with the Environmental Permit
1.7 Status of Other Statutory Environmental Requirements
2.3 Monitoring Parameters, Frequency, Duration and Monitoring Dates
2.6 Monitoring Schedule for the Reporting Period
3.3 Monitoring Parameters, Frequency, Duration and Monitoring Dates
3.6 Monitoring Schedule for the Reporting Period
4.3 Monitoring Parameters, Frequency and Duration
4.6 Monitoring Schedule for the Reporting Period
5.3 Monitoring Frequency and Dates
5.6.1 Environment of Stream Courses
7.2 Site Inspections and Key Observations
7.3 Landscape and Visual Mitigation Measures
7.4 Land Contamination Assessment
7.5 Monitoring for Compensation Woodland
7.6 Monitoring for Preserved/Transplanted Plant Species of Conservation Importance
7.6.1 Preserved Plant Species of Conservation Importance
7.6.2 Transplanted Plant Species of Conservation Importance
8 Implementation Status of Environmental Mitigation Measures
9 Summary of Exceedances of the Environmental Quality Performance Limit
10 Summary of Complaints, Notification of Summons and Successful Prosecutions
11.1 Construction Programme for the Coming Reporting Period
11.2 Monitoring Schedule for the Coming Reporting Period
12 Conclusions and Recommendations
Tables
Table 1.1: Commencement Dates of Construction Works for the Active Works Contracts
Table 1.2: Contact Information of Key Personnel
Table 1.3: Major Activities in the Reporting Period
Table 1.4: Summary of Status for the Environmental Aspects under the Updated EM&A Manual
Table 2.1: Impact Air Quality Monitoring Stations
Table 2.2: Impact Air Quality Monitoring Parameters, Frequency, Duration and Monitoring Dates
Table 2.3: Action and Limit Levels for 1-hour TSP
Table 2.4: Impact Air Quality Monitoring Equipment
Table 2.5: Summary of 1-hour TSP Monitoring Results in the Reporting Period
Table 3.1: Impact Construction Noise Monitoring Stations
Table 3.2: Impact Construction Noise Monitoring Parameters, Frequency, Duration and Monitoring Dates
Table 3.3: Action and Limit Levels for Construction Noise
Table 3.4: Noise Monitoring Equipment
Table 3.5: Summary of Construction Noise Monitoring Results in the Reporting Period
Table 4.1: Impact Water Quality Monitoring Stations
Table 4.2: Water Quality Monitoring Parameters, Duration and Frequency
Table 4.3: Calculated Action and Limit Levels for Impact Water Quality Monitoring
Table 4.4: Water Quality Monitoring Equipment
Table 4.5: Details of Exceedances Recorded for Water Quality Monitoring 17
Table 5.1: Impact Ecological Monitoring Stations
Table 5.2: Impact Ecological Monitoring Schedule
Table 5.3: Ecologically related Water Quality Monitoring Parameters and Testing Methods
Table 5.4: Ecologically-related Water Quality Monitoring Equipment
Table 5.5: Action and Limit Levels for Impact Ecological Monitoring
Table 5.8: Environment of Stream Courses at each Monitoring Station
Table 5.9: Summary of Aquatic Invertebrate Species Recorded in the Reporting Period
Table 5.10: Summary of Fish Species Recorded in the Reporting Period
Table 6.1: Quantities of Different Waste Generated and Imported Fill Materials for TCW
Table 7.1: Key Observations Identified during Site Inspections in this Reporting Period
Table 7.2: Landscape and Visual – Construction Phase Audit Summary
Table 7.3: Examples of Landscape and Visual Mitigation Measures in the Reporting Period
Table 7.4: Monitoring Programme for Landscape and Visual
Table 7.5: Event and Action Plan for Landscape and Visual
Table 7.6: Photos of the Compensation Woodland Planting
Table 10.1: Summary of Environmental Complaints
Table 11.1: Major Activities for the next Reporting Period
Tung Chung New Town Extension (TCNTE) is one of the major initiatives under the Government's multi-pronged approach to increase land supply to meet Hong Kong's medium- to long-term needs for housing, economic and social developments. The Environmental Impact Assessment (EIA) Report for TCNTE (Register No. AEIAR-196/2016) was approved on 8 April 2016 and the Environmental Permit (EP) No. EP-519/2016, covering the construction and operation of TCNTE, was granted on 9 August 2016. The EIA Report and EP cover both Tung Chung East (TCE) and Tung Chung West (TCW, hereafter referred to as "the Project").
Civil Engineering and Development Department (CEDD) 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 requirements specified in the EP, Updated EM&A Manual (the Manual), EIA Report of the Project – i.e., Tung Chung New Town Extension (TCNTE) development in Tung Chung West (TCW) and other relevant statutory requirements.
This EM&A Report summarises the monitoring results and audit findings of the EM&A programme undertaken for the TCW Project during the reporting period from 1 to 30 November 2022 in accordance with the Manual. A summary of the monitoring and audit activities conducted in the reporting period is listed as below.
Summary of Monitoring and Audit Activities in the Reporting Period
|
Parameter |
Number of Sessions |
|
Air Quality Monitoring |
5 sessions |
|
Noise Monitoring |
4 sessions |
|
Water Quality Monitoring |
13 sessions |
|
Ecological Monitoring |
1 session |
|
Environmental Site Inspection |
Contract No. NL/2020/05 ("Contract 5"): 5 sessions Contract No. NL/2020/06 ("Contract 6"): 5 sessions |
Environmental auditing works, including weekly site inspections of construction works conducted by the ET, audit of implementation of Habitat Enhancement and Translocation Plan for Amphibian Species of Conservation Importance, Detailed Compensatory Woodland Planting Plan, Plan on Provision of Buffer Zones, Detailed Preservation and/or Translocation Plan for Plant Species of Conservation Importance and Waste Management Plan were conducted in the reporting period. Based on the audit results and the observation for the reporting period, environmental pollution control and mitigation measures for the Project were properly implemented.
Breaches of Action and Limit Levels for Air Quality
No exceedance of Action and Limit Levels was recorded for construction air quality monitoring in the reporting period.
Breaches of Action and Limit Levels for Noise
No exceedance of Limit Levels was recorded for construction noise monitoring in the reporting period. One (1) Action Level exceedance was triggered from the receipt of one (1) environmental complaint related to noise nuisance in the reporting period. Investigation was conducted for the exceedance in accordance with the Event and Action Plan.
Breaches of Action and Limit Levels for Water Quality
Turbidity and Suspended Solids (SS) exceedances were recorded during the reporting period. Relevant investigation and follow-up actions were conducted in accordance with the Event and Action Plan. The exceedances were considered not related to this Project after investigations.
Ecological Monitoring
No exceedance of Action and Limit Levels was recorded for impact ecological monitoring in the reporting period.
Environmental Complaints, Non-compliance & Summons
There was no notification of summons or prosecution recorded in the reporting period.
Four (4) environmental complaints related to Contract 6 were received in the reporting period. Investigations were conducted for the environmental complaints in accordance with the complaint handling process as stated in the Complaint Management Plan.
Reporting Change
There was no reporting change in the reporting period.
Summary of Upcoming Construction Activities
Contract No. NL/2020/05 ("Contract 5") - Ma Wan Chung
· Piling Work at Part D;
· Slope Excavation and Soil Nail Installation, Temporary Excavation and Lateral Support (ELS) Works, Drainage Work, Excavation for Drainage Work, Sheet-piling Work and Excavation for Retaining Wall Construction at Part E;
· Temporary ELS Works, Sheet-piling Work and Drainage Work at Part F;
· Site Investigation and Pre-drilling, Site Clearance and Forming Site Access at Part G;
· Piling Work, Excavation and Retaining Wall Construction at Part H;
Contract No. NL/2020/06 ("Contract 6") - Tung Chung Valley
· Remediation Works at the sites identified with contamination at Area 42 in accordance with the approved Remediation Action Plan (RAP);
· Site Clearance, Site Formation, Sorting of C&D materials and Backfilling, Drainage Works, Excavation and Delivery of General Soil Offsite and Breaking of Rock Materials at the non-contamination sites at Area 42;
· Piling and Site Clearance at Road L29;
· Drainage Works and Road Works at Road L30;
· Excavation and Drainage Works at Visitor Centre;
· Plate Load Test at Sewage Pumping Station-A;
· Site Clearance, Road Works, Drainage Works, Planter Maintenance and Grass Removal at Yu Tung Road;
· Site Clearance, Tree Removal and Proof Drilling Work at Chung Mun Road;
· Piling Works and Site Clearance at Shek Mun Kap Road;
· Site Clearance, Drilling Works, Drainage Works and Breaking of Rock for Fill Material at Area 46.
1
Introduction
1.1
Background
Tung Chung New Town Extension (TCNTE) is one of the major initiatives under the Government's multi-pronged approach to increase land supply to meet Hong Kong's medium- to long-term needs for housing, economic and social developments. The Environmental Impact Assessment (EIA) Report for TCNTE (Register No. AEIAR-196/2016) was approved on 8 April 2016 and the Environmental Permit (EP) No. EP-519/2016, covering the construction and operation of TCNTE, was granted on 9 August 2016. The EIA Report and EP cover both Tung Chung East (TCE) and Tung Chung West (TCW, hereafter referred to as "the Project").
Civil Engineering and Development Department (CEDD) 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 requirements specified in the EP, Updated EM&A Manual (the Manual), EIA Report of the TCW Project and other relevant statutory requirements. The scope of the Project works in TCW includes the following elements:
· Site formation works;
· Construction or the River Park including a visitor centre;
· Construction of proposed open space;
· Construction of sustainable urban drainage system;
· Construction of roads, footpath and the associated junction / road improvement works;
· Construction of coastal pedestrian access;
· Engineering infrastructure works covering drainage, sewerage, waterworks and landscaping works; and
· Implementation of environmental mitigation measures and environmental monitoring and audit works.
The construction works for the Project were commenced on 3 November 2021 and are divided into various works contracts. The following active works contracts were commenced on the dates shown in Table 1.1.
Table 1.1: Commencement Dates of Construction Works for the Active Works Contracts
|
Contract No. |
Contract Name |
Commencement Date of Construction Works |
|
Contract No. NL/2020/05 ("Contract 5") |
Tung Chung New Town Extension – Site Formation and Infrastructure Works at Ma Wan Chung |
3 Nov 2021 |
|
Contract No. NL/2020/06 ("Contract 6") |
Tung Chung New Town Extension – Site Formation and Infrastructure Works at Tung Chung Valley, Phase 1 |
3 Nov 2021 (Note: Construction works at Tung Chung Valley commenced on 30 Nov 2021) |
The locations of Contracts 5 and 6 are shown in Figures 1.1 and 1.2 respectively.
1.2
Scope of this Report
This is the Monthly EM&A Report for the TCW Project which summarises the key findings of the EM&A programme for the construction works during the reporting period from 1 to 30 November 2022.
1.3
Organisation
Structure
The organisation structure of the Project is shown in Appendix A. The key personnel contact names and contact details of the active works contracts are summarised in Table 1.2 below.
Table 1.2: Contact Information of Key Personnel
|
Party |
Position |
Name |
Telephone |
|
Contract No. NL/2020/05 ("Contract 5") Tung Chung New Town Extension – Site Formation and Infrastructure Works at Ma Wan Chung |
|||
|
Project Proponent (Civil Engineering and Development Department (CEDD)) |
Chief Engineer |
Gavin Wong |
2231 4439 |
|
Senior Engineer |
Samson Kwong |
2231 4468 |
|
|
Engineer |
Carol Lam |
2231 4472 |
|
|
Engineer’s Representative (ER) (Ove Arup and Partners Hong Kong Limited) |
Principal Resident Engineer |
Jackson Wong |
5699 5710 |
|
Senior Resident Engineer |
Sam Chan |
9671 5538 |
|
|
Senior Inspector of Works |
Tony Chiu |
5699 5792 |
|
|
Contractor (Build King – Richwell Civil Joint Venture) |
Project Manager |
Eric Yip |
9196 6098 |
|
Construction Manager |
Artie Wong |
9633 0977 |
|
|
|
Site Agent |
Ricky Hon |
9100 7509 |
|
|
Environmental Officer |
Calvin Chan |
6117 2894 |
|
|
24-hour Complaint Hotline |
- |
9326 1161 |
|
Contract No. NL/2020/06 ("Contract 6") Tung Chung New Town Extension – Site Formation and Infrastructure Works at Tung Chung Valley, Phase 1 |
|||
|
Project Proponent (Civil Engineering and Development Department (CEDD)) |
Chief Engineer |
Gavin Wong |
2231 4439 |
|
Senior Engineer |
CT Lam |
2231 4469 |
|
|
Engineer |
Samuel Yiu |
2231 4510 |
|
|
Engineer’s Representative (ER) (Ove Arup and Partners Hong Kong Limited) |
Principal Resident Engineer |
Jackson Wong |
5699 5710 |
|
Senior Resident Engineer |
Shirley Yeung |
9671 5518 |
|
|
Senior Inspector of Works |
Jensen Lo |
5699 5746 |
|
|
Contractor (China Railway Group Limited) |
Project Director |
Andy Yeung |
9650 0037 |
|
Project Manager |
Paul Chan |
6263 0621 |
|
|
Construction Manager |
Aaron Choi |
5345 3438 |
|
|
Deputy Project Manager / Superintendent |
Robert Luo |
9588 2485 |
|
|
|
Site Agent |
Dan Tang |
6365 8035 |
|
|
Environmental Officer |
Simon Mak |
6266 0745 |
|
|
24-hour Complaint Hotline |
- |
9326 1161 |
|
Environmental Team (ET) (Mott MacDonald Hong Kong Limited) |
ET Leader |
Daniel Sum |
2585 8495 |
|
Deputy ET Leader |
Heidi Yu |
2828 5704 |
|
|
Independent Environmental Checker (IEC) (Binnies Hong Kong Limited) |
IEC |
Manuel Chua |
3894 9501 |
|
Deputy IEC |
Edward Lau |
3894 9502 |
|
1.4
Summary of
Construction Works
The programme of the construction is shown in Appendix B.
As informed by the Contractors of the active works contracts, details of the major works carried out in this reporting period are listed in Table 1.3.
The environmental mitigation implementation schedule is presented in Appendix C.
Table 1.3: Major Activities in the Reporting Period
|
Activities |
Key Issues |
Key Mitigation Measures |
|
Contract No. NL/2020/05 ("Contract 5") Tung Chung New Town Extension – Site Formation and Infrastructure Works at Ma Wan Chung |
||
|
● Pre-drill for Piling Work at Part D ● Piling Work at Part D ● Soil Nail Work at Part E ● Slope Excavation at Part E ● Temporary ELS Works (Sheet-piling and Excavation) at Part E ● Drainage Work (Excavation, Pipe Installation and Concreting) at Part E ● Sheet-piling Work at Part E ● Tree Removal and Transplantation at Part F ● Sheet-pile Installation at Part F ● Site Clearance at Part G ● Forming Access Road at Part G ● Silt Curtain Installation at Part G ● Site Investigation at Part G ● Piling Work at Part H ● Excavation at Part H ● Retaining Wall Construction at Part H |
● Dust Emission ● Handling and storage of C&D materials generated from construction activities ● Noise from plant operation ● Emission of dark smoke from PMEs ● Efficiency of wastewater and drainage management ● Tree Protection |
● Good site practices ● Regular water spraying on stockpiles ● Provide tarpaulin sheets coverage on stockpiles ● Sorting and reuse of C&D materials as far as practicable ● Use of QPME and noise barrier/acoustic mat ● Regular maintenance of PMEs ● Implementation of wastewater and drainage management ● Retain and protect all existing trees and vegetation within the study area which are not directly affected by the works |
|
Contract No. NL/2020/06 ("Contract 6") Tung Chung New Town Extension – Site Formation and Infrastructure Works at Tung Chung Valley, Phase 1 |
||
|
● Site Clearance at Area 42, Road L29, Area 46, Yu Tung Road, Chung Mun Road and Shek Mun Kap Road ● Sorting of C&D Materials and Backfilling at Area 42 ● Site Formation at the non-contamination sites at Area 42 ● Remediation Works at the sites identified with contamination at Area 42 in accordance with the approved RAP ● Drainage Works at Area 42, Road L30 and Visitor Centre ● Excavation and Delivery of General Soil Offsite at Area 42 ● Breaking of Rock Materials at Area 42 ● Piling at Road L29 and Sewage Pumping Station-A ● Excavation Works at Visitor Centre ● Road Works at Yu Tung Road ● Planter Maintenance and Grass Removal at Yu Tung Road ● Tree Removal at Chung Mun Road and Area 46 ● Proof Drilling Work at Chung Mun Road ● Ground Investigation Works at Shek Mun Kap Road ● Drilling Works at Area 46 ● Breaking of Rock for Fill Material at Area 46 |
● Dust Emission ● Handling and storage of C&D materials generated from construction activities ● Noise from plant operation ● Emission of dark smoke from PMEs ● Efficiency of wastewater and drainage management ● Tree Protection |
● Good site practices ● Regular water spraying on stockpiles ● Provide tarpaulin sheets coverage on stockpiles ● Sorting and reuse of C&D materials as far as practicable ● Use of QPME and noise barrier/acoustic mat ● Regular maintenance of PMEs ● Implementation of wastewater and drainage management ● Retain and protect all existing trees and vegetation within the study area which are not directly affected by the works |
1.5
Summary of EM&A Requirements
The status of all environmental aspects is presented in Table 1.4. The EM&A requirements remained unchanged during the reporting period.
Table 1.4: Summary of Status for the Environmental Aspects under the Updated EM&A Manual
|
Parameter |
Status |
|
Air Quality |
|
|
Baseline Monitoring |
The results of baseline air quality monitoring for TCW were reported in the Baseline Monitoring Report and submitted to EPD under EP Condition 3.4. |
|
Impact Monitoring |
On-going for TCW. Monitoring conducted three times in every 6 days. |
|
Noise |
|
|
Baseline Monitoring (Construction Noise) |
The results of baseline noise monitoring for TCW were reported in the Baseline Monitoring Report and submitted to EPD under EP Condition 3.4. |
|
Impact Monitoring (Construction Noise) |
On-going for TCW. Monitoring conducted once per week. |
|
Impact Monitoring for Road Traffic Noise during Operational Phase |
To be conducted during operational phase. |
|
Fixed Noise Commissioning Test |
To be implemented by the Contractor before operation of Tung Chung New Town Extension (TCNTE) development. |
|
Water Quality |
|
|
Baseline Monitoring |
The results of baseline water quality monitoring for TCW were reported in the Baseline Monitoring Report and submitted to EPD under EP Condition 3.4. |
|
Impact Monitoring |
On-going for TCW. Monitoring conducted three times per week. |
|
Waste Management |
|
|
Waste Monitoring |
On-going. |
|
Land Contamination |
|
|
Contamination Assessment Plan (CAP), Remediation Action Plan (RAP) and Remediation Report (RR) |
Remediation works in Area 42 was being carried out in accordance with the Contamination Assessment Report and Remediation Action Plan as approved by EPD. Proposed site investigation of the remaining potentially contaminated areas identified in the approved EIA Report is to be conducted after land resumption. Site investigation at the suspected land contamination sites in Chung Mun Road, Road L29 and Shek Mun Kap Road was completed in accordance with the Supplementary Contamination Assessment Plan as approved by EPD. Contamination Assessment Report was submitted to EPD on 29 November 2022. |
|
Ecology |
|
|
Monitoring for Compensation Woodland |
Compensation Woodland Planting was completed in May 2022. With the approval from EPD on the monitoring proposal in October 2022, the monitoring for Compensation Woodland was commenced in November 2022. |
|
Monitoring for Emergent Plant inside the future River Park |
To be conducted when the emergent plants are planted. |
|
Monitoring for Translocated Amphibians of Conservation Importance |
Pre-construction survey was conducted during 20-22 October 2021. Capture and translocation exercise was conducted during 29-31 October 2021. |
|
Monitoring for Preserved/Transplanted Plant Species of Conservation Importance |
Pre-construction Survey Report and the Preservation/Translocation Proposal were submitted to EPD. Preservation of Plant Species of Conservation Importance has been commenced and monitoring has been carried out in the reporting period. Translocation of Plant Species of Conservation Importance will be commenced in Mar 2023 tentatively. |
|
Baseline Monitoring for Tung Chung Stream Ecologically Important Stream (EIS) and Wong Lung Hang EIS |
The results of baseline ecological monitoring for TCW were reported in the Baseline Monitoring Report and submitted to EPD under EP Condition 3.4. Monitoring for Wong Lung Hang was not required and the proposal by the ET Leader of TCE was accepted by EPD on 2 September 2021. |
|
Impact Monitoring for Tung Chung Stream |
On-going for TCW. Monitoring conducted at monthly intervals.
|
|
Landscape and Visual |
|
|
Baseline Monitoring |
The results of baseline landscape and visual monitoring were reported in the Baseline Monitoring Report and submitted to EPD under EP Condition 3.4. |
|
Site Environmental Audit |
|
|
Regular Site Inspection |
On-going. |
|
Plan on Provision of Buffer Zones implementation measures |
Under implementation by the Contractor of Contract 6. |
|
Plan for Review of Use of New Low Noise Road Surfacing Material implementation measures |
Not applicable during this reporting period. |
|
River Park Plan implementation measures |
Not applicable during this reporting period. |
|
Preservation and/or Translocation Plan for Plant Species of Conservation Importance implementation measures |
Under implementation by the Contractors of Contracts 5 and 6. |
|
Detailed Compensatory Woodland Planting Plan implementation measures |
Under implementation by the Contractor of Contract 6. |
|
Habitat Enhancement and Translocation Plan for Amphibian Species of Conservation Importance implementation measures |
Under implementation by the Contractor of Contract 6. |
|
Waste Management Plan implementation measures |
Under implementation by the Contractors of Contracts 5 and 6. |
|
Complaint Hotline and Email Channel |
Under implementation by the Contractors of Contracts 5 and 6. |
|
Environmental Log Book |
On-going. |
Taking into account the construction works, impact monitoring of air quality, noise, water quality, ecology and waste management were carried out in the reporting period. The monitoring schedule of air quality, noise, water quality and ecological monitoring are provided in Appendix F, Appendix G, Appendix H and Appendix I respectively.
The EM&A programme also involved environmental 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 and relevant EP submissions, including Habitat Enhancement and Translocation Plan for Amphibian Species of Conservation Importance, Detailed Preservation and/or Translocation Plan for Plant Species of Conservation Importance, Detailed Compensatory Woodland Planting Plan, Plan on Provision of Buffer Zones and Waste Management Plan.
1.6
Status of
Statutory Environmental Compliance with the Environmental Permit
The status of statutory environmental compliance with the EP conditions under the EIAO, submission status under the EP and implementation status of mitigation measures are presented in Appendix D.
1.7
Status of Other Statutory Environmental Requirements
The environmental licences and permits (including Environmental Permit, waste disposal billing account, registration as chemical waste producer and construction noise permit) which were valid in the reporting period are presented in Appendix E. No non-compliance with environmental statutory requirements was recorded.
1.8
Reporting of EM&A Results
The EM&A programme for the Project required environmental monitoring for air quality, noise and water quality as well as environmental site inspections for air quality, noise, water quality, waste management, ecology, and landscape and visual impacts. The EM&A requirements and related findings for each component are summarised in the following sections:
● Section 2 - Air Quality;
● Section 3 - Noise;
● Section 4 - Water Quality;
● Section 5 - Ecology;
● Section 6 - Waste Management Status;
● Section 7 - EM&A Site Inspection;
● Section 8 - Implementation Status of Environmental Mitigation Measures;
● Section 9 - Summary of Exceedances of the Environmental Quality Performance Limit;
● Section 10 - Summary of Complaints, Notification of Summons and Successful Prosecutions;
● Section 1 - Future Key Issues; and
● Section 12 - Conclusions and Recommendations.
2
Air Quality
2.1
Monitoring Requirements
According to the requirements in the Updated EM&A Manual, regular impact air quality monitoring shall be carried out at the designated monitoring locations during the construction period of the Project to obtain 1-hour Total Suspended Particulate (TSP) concentrations. One-hour sampling should be done at least 3 times per 6 days while the highest dust impact is expected. Further details of the impact air quality monitoring are presented in the following sections.
2.2
Monitoring Locations
A total of two air quality monitoring stations were identified for impact monitoring in the TCNTE possible development area (PDA) at Tung Chung West and are covered by this Report.
Locations of the impact air quality monitoring stations covered in this Report are summarised in Table 2.1 and shown in Appendix F1.
Table 2.1: Impact Air Quality Monitoring Stations
|
Monitoring Station |
Location |
|
DM-5 |
Lung Tseung Tau |
|
DM-6 |
Mok Ka |
2.3
Monitoring Parameters, Frequency, Duration and Monitoring Dates
Table 2.2 summarises the parameters, frequency, duration and monitoring dates for impact air quality monitoring during the reporting period.
Table 2.2: Impact Air Quality Monitoring Parameters, Frequency, Duration and Monitoring Dates
|
Monitoring Station |
Parameter |
Frequency and Duration |
Monitoring Dates |
|
DM-5 |
1-hour Total Suspended Particulates (TSP) |
3 times per 6 days during the construction period of the Project |
2, 8, 14, 19 & 25 Nov 2022 |
|
DM-6 |
2.4
Action and Limit Levels
The Action and Limit Levels of the air quality monitoring are provided in Table 2.3 below.
Table 2.3: Action and Limit Levels for 1-hour TSP
|
Monitoring Station |
Action Level (μg/m3) |
Limit Level (μg/m3) |
|
DM-5 |
266 |
500 |
|
DM-6 |
260 |
500 |
2.5
Monitoring Equipment
Portable direct reading dust meter was used to carry out the 1-hour TSP impact monitoring for the Project. The proposed use of portable direct reading dust meters was submitted to IEC and agreed by IEC in accordance with Section 5.5 of the Updated EM&A Manual. With the use of direct reading dust meter, it can allow prompt and direct results for the EM&A reporting and the implementation of the Event and Action Plan. The portable direct reading dust meter would be calibrated every year against High Volume Sampler (HVS) to check the validity and accuracy of the results measured by direct reading method.
Table 2.4 summarizes the equipment used in the impact air quality monitoring during the reporting period. Copies of the calibration certificates for the portable dust meters are presented in Appendix F2 and show that the portable direct reading dust meter is capable of providing comparable results with that provided by HVS.
Table 2.4: Impact Air Quality Monitoring Equipment
|
Monitoring Station |
Equipment |
Model |
|
DM-5 |
Portable direct reading dust meter
|
SIBATA LD-3B (Serial No. 336338 and 436553) |
|
DM-6 |
2.6
Monitoring Schedule for the Reporting Period
The schedule for impact air quality monitoring during the reporting period is provided in Appendix F3.
2.7
Results and Observations
The monitoring results for 1-hour TSP are summarised in Table 2.5. The monitoring data and the graphical presentation are provided in Appendix F4.
Table 2.5: Summary of 1-hour TSP Monitoring Results in the Reporting Period
|
Monitoring Station |
Average (μg/m3) |
Range (μg/m3) |
Action Level (μg/m3) |
Limit Level (μg/m3) |
|
DM-5 |
56 |
30 – 88 |
266 |
500 |
|
DM-6 |
42 |
22 – 51 |
260 |
500 |
The dust sources in the reporting period included road traffic and nearby construction sites.
No exceedance of Action and Limit Levels was recorded for construction air quality monitoring in the reporting period. No action was thus required to be undertaken in accordance with the Event and Action Plan presented in Appendix F5.
3
Noise
3.1
Monitoring Requirements
According to the requirements in the Updated EM&A Manual, regular impact construction noise monitoring shall be carried out at the designated monitoring locations once per week during the construction period of the Project. Construction noise level shall be measured in terms of the A-weighted equivalent continuous sound pressure level (Leq). Leq (30min) shall be used as the monitoring parameter for the time period between 0700 and 1900 hours on normal weekdays. For all other time periods, Leq (5min) shall be employed for comparison with the Noise Control Ordinance (NCO) criteria. As supplementary information for data auditing, statistical results such as L10 and L90 shall also be obtained for reference.
During the reporting period, regular impact construction noise monitoring at NMS-CA-6, NMS-CA-7, NMS-CA-8 and NMS-CA-9 in Tung Chung Valley commenced on 2 December 2021 (after the commencement of construction works in Tung Chung Valley), while regular impact construction noise monitoring at NMS-CA-5 in Ma Wan Chung continued.
Further details of the impact construction noise monitoring are presented in the following sections.
3.2
Monitoring Locations
A total of five construction noise monitoring stations were identified for impact monitoring in the TCNTE possible development area (PDA) at Tung Chung West and are covered by this Report.
Locations of the impact construction noise monitoring stations covered in this Report are summarised in Table 3.1 and shown in Appendix G1.
Table 3.1: Impact Construction Noise Monitoring Stations
|
Monitoring Station |
Location |
Type of Measurement |
|
NMS-CA-5 |
Village house in Ma Wan Chung (G/F) |
Free field^ |
|
NMS-CA-6 |
Village house in Shek Mun Kap (G/F) |
Free field^ |
|
NMS-CA-7 |
YMCA of Hong Kong Christian College (Roof Floor) |
Façade |
|
NMS-CA-8 |
Caritas Charles Vath College (Roof Floor) |
Façade |
|
NMS-CA-9* |
Hong Chi Shiu Pong Morninghope School (Roof Floor) |
Façade |
Remark: * NMS-CA-9, which was described as "possible school development near Tung Chung Area 39" in the Updated EM&A Manual, was subsequently confirmed as "Hong Chi Shiu Pong Morninghope School" prior to commencement of baseline monitoring.
^ For Free Field measurement, +3dB(A) should be added to the measured results.
3.3
Monitoring Parameters, Frequency, Duration and Monitoring Dates
Table 3.2 summarises the parameters, frequency, duration and monitoring dates for impact construction noise quality monitoring during the reporting period.
Table 3.2: Impact Construction Noise Monitoring Parameters, Frequency, Duration and Monitoring Dates
|
Monitoring Station |
Parameter |
Frequency and Duration |
Monitoring Dates |
|
NMS-CA-5 |
30-min measurement between 0700 & 1900 hrs on normal weekdays (Monday to Saturday) Leq, L10 and L90 would be recorded |
Once every week for 30 mins during the construction period of the Project |
3, 8, 17 & 22 Nov 2022 |
|
NMS-CA-6 |
|||
|
NMS-CA-7 |
|||
|
NMS-CA-8 |
|||
|
NMS-CA-9 |
3.4
Action and Limit Levels
The Action and Limit Levels for construction noise of the Project are provided in Table 3.3 below.
Table 3.3: Action and Limit Levels for Construction Noise
|
Monitoring Station |
Time Period |
Action Level |
Limit Level (dB(A), Leq(30min)) |
|
NMS-CA-5 NMS-CA-6 |
0700-1900 hrs on normal weekdays# |
When one documented complaint is received |
75 |
|
NMS-CA-7* NMS-CA-8* NMS-CA-9* |
70 (65 during school examination periods) |
Note: # If works are to be carried out during restricted hours, the conditions stipulated in the construction noise permit issued by the Noise Control Authority have to be followed.
* Denotes school / educational institution.
3.5
Monitoring Equipment
Integrating Sound Level Meters were used to conduct impact construction noise monitoring. They were the Type 1 sound level meter capable of giving a continuous readout of the noise level readings including equivalent continuous sound pressure level (LAeq) and percentile sound pressure level (Lx). They complied with International Electrotechnical Commission Publications 651:1979 (Type 1) and 804:1985 (Type 1). Table 3.4 summarizes the equipment used in the impact construction noise monitoring. Copies of the calibration certificates for the sound level meters and acoustical calibrators are attached in Appendix G2.
Table 3.4: Noise Monitoring Equipment
|
Monitoring Station |
Equipment & Model |
|
|
|
Integrating Sound Level Meter |
Acoustical Calibrator |
|
NMS-CA-5 |
Rion NL-52 (serial no. 00542913) |
Larson Davis CAL200 (serial no. 11334) |
|
NMS-CA-6 |
||
|
NMS-CA-7 |
||
|
NMS-CA-8 |
||
|
NMS-CA-9 |
||
3.6
Monitoring Schedule for the Reporting Period
The schedule for impact construction noise monitoring during the reporting period is provided in Appendix G3.
3.7
Results and Observations
The monitoring results for construction noise are summarised in Table 3.5. The monitoring data and the graphical presentation are provided in Appendix G4.
Table 3.5: Summary of Construction Noise Monitoring Results in the Reporting Period
|
Monitoring Station |
Average (dB(A), Leq(30min)) |
Range (dB(A), Leq(30min)) |
Limit Level (dB(A), Leq(30min)) |
|
NMS-CA-5 |
62^ |
58 – 65^ |
75 |
|
NMS-CA-6 |
54^ |
49 – 55^ |
|
|
NMS-CA-7 |
67 |
66 – 67 |
70 (65# during school examination periods) |
|
NMS-CA-8 |
67 |
66 – 68 |
|
|
NMS-CA-9 |
65 |
64 – 66 |
Note: ^ +3dB(A) Façade correction included for Free Field measurement.
# No school examination was taken place at NMS-CA-7 and NMS-CA-9 during this reporting period.
(1) Reduced to 65 dB(A) during school examination periods at NMS-CA-8. School examination period took place from 24 Nov to 25 Nov.
The noise sources during the construction noise monitoring in the reporting period included bird sound, nearby traffic, school activities and aircraft as well as nearby construction sites.
No Limit Level exceedance was recorded for construction noise monitoring in the reporting period. One (1) Action Level exceedance was triggered from the receipt of one (1) environmental complaint related to noise nuisance in the reporting period. Investigation was conducted for the complaint in accordance with the Event and Action Plan (Appendix G5) and the details were provided in Section 10.
4
Water Quality
4.1
Monitoring
Requirements
According to the requirements in the Updated EM&A Manual, regular impact water quality monitoring shall be carried out 3 days per week at the designated monitoring locations during the construction period of the Project. The interval between two sets of monitoring shall not be less than 36 hours. Further details of the impact water quality monitoring are presented in the following sections.
4.2
Monitoring Locations
The locations of the monitoring stations under the Project are shown in Table 4.1 and Appendix H1.
Table 4.1: Impact Water Quality Monitoring Stations
|
Monitoring Station |
Description |
Location |
|
|
|
Easting |
Northing |
|
|
TCW-WQM1 |
Downstream of Tung Chung Stream |
810784 |
815710 |
|
Tung Chung Stream (West) |
|||
|
TCW-WQM2 |
Middle of Tung Chung Stream (West) |
810701 |
815015 |
|
TCW-WQM4 |
Upstream of Tung Chung Stream (West) |
810641 |
814405 |
|
TCW-WQM6(1) |
Downstream of Tung Chung Stream (West) |
810814 |
815385 |
|
Tung Chung Stream (East) |
|||
|
TCW-WQM3A(2) |
Middle of Tung Chung Stream (East) [aka Upstream of River Park] |
811083 |
814895 |
|
TCW-WQM5A(3) |
Upstream of Tung Chung Stream (East) |
811194 811138 |
814368 814498 |
|
TCW-WQM7(1) |
Downstream of Tung Chung Stream (East) [aka Downstream of River Park] |
810862 |
815400 |
Notes:
(1) TCW-WQM6 and TCW-WQM7 are additional monitoring stations which can monitor the water quality impact associated with construction activities along the Tung Chung Stream (West) and Tung Chung Stream (East) respectively.
(2) TCW-WQM3A is the proposed relocated TCW-WQM3, which will be upstream of the River Park where there are no direct works on Tung Chung Stream (East). The original TCW-WQM3 location lies within the construction works area for the future River Park, which will be directly modified and inaccessible during construction phase.
(3) The monitoring location of TCW-WQM5A will be bounded by the coordinates shown, with the exact location depending on the nearest safe accessible and practical location to the original TCW-WQM5.
4.3
Monitoring Parameters, Frequency and Duration
Table 4.2 summarises the parameters, frequency and duration for impact water quality monitoring during the reporting period.
Table 4.2: Water Quality Monitoring Parameters, Duration and Frequency
|
Monitoring Station |
Parameters (Units) |
Frequency, Duration and Replication |
Monitoring Dates |
|
TCW-WQM1, TCW-WQM2, TCW-WQM3A, TCW-WQM4, TCW-WQM5A, TCW-WQM6, TCW-WQM7 |
● Dissolved Oxygen (DO) (mg/L and % saturation) ● Temperature (°C) ● Turbidity (NTU) ● Salinity (ppt) ● pH ● Suspended Solids (SS) (mg/L) ● Conductivity(1) (µS/cm) |
Impact monitoring: 3 days per week during the construction period of the Project. Not less than 36 hours’ interval between two sets of monitoring. Two (2) replicate in-situ measurements and water samples. |
2, 4, 7, 9, 11, 14, 16, 18, 21, 23, 25, 28 & 30 Nov 2022 |
Remark:
1. Water depth measurement is not applicable due to very shallow depth of the monitoring locations.
Note:
(1) Conductivity is an additional reference monitoring parameter adopted during a review of the baseline monitoring programme in June 2021. It is not compulsory as prescribed in the Updated EM&A Manual.
In addition to the parameters presented in Table 4.2, other relevant data were also recorded, including monitoring location, time, approximate water depth (by visual observation), tidal condition (if applicable), weather conditions and any special phenomena or work underway at the Project site.
4.4
Action and Limit Levels
The calculated Action and Limit Levels of the impact water quality monitoring for the monitoring stations of Tung Chung Stream (West), Tung Chung Stream (East) and TCW-WQM1 are shown in Table 4.3 below.
Table 4.3: Calculated Action and Limit Levels for Impact Water Quality Monitoring
|
Parameters |
Action Level |
Limit Level |
|
Tung Chung Stream (West) |
||
|
DO in mg/L |
3.4 mg/L |
3.3 mg/L |
|
SS in mg/L |
7.0 mg/L or 120% of upstream control station at the same tide of the same day, whichever is higher |
16.9 mg/L or 130% of upstream control station at the same tide of the same day, whichever is higher |
|
Turbidity in NTU |
6.7 NTU or 120% of upstream control station at the same tide of the same day, whichever is higher |
22.0 NTU or 130% of upstream control station at the same tide of the same day, whichever is higher |
|
Tung Chung Stream (East) |
||
|
DO in mg/L |
4.2 mg/L |
4.0 mg/L |
|
SS in mg/L |
7.2 mg/L or 120% of upstream control station at the same tide of the same day, whichever is higher |
9.7 mg/L or 130% of upstream control station at the same tide of the same day, whichever is higher |
|
Turbidity in NTU |
9.8 NTU or 120% of upstream control station at the same tide of the same day, whichever is higher |
22.5 NTU or 130% of upstream control station at the same tide of the same day, whichever is higher |
|
TCW-WQM1 |
||
|
DO in mg/L |
2.2 mg/L |
1.8 mg/L |
|
SS in mg/L |
7.3 mg/L |
9.7 mg/L |
|
Turbidity in NTU |
24.7 NTU |
35.3 NTU |
Notes:
(1) For DO, non-compliance occurs when monitoring results is lower than the limits.
(2) For SS and Turbidity, non-compliance occurs when monitoring results is larger than the limits.
(3) Action and Limit Levels do not apply to TCW-WQM4 and TCW-WQM5A which are upstream control stations.
4.5
Monitoring Equipment
Table 4.4 summarizes the equipment used in the impact water quality monitoring works. All the monitoring equipment complied with the requirements set out in the Updated EM&A Manual. Copies of the calibration certificates are attached in Appendix H2.
Table 4.4: Water Quality Monitoring Equipment
|
Equipment |
Brand and Model |
|
Multifunctional Meter (in-situ measurement of DO, pH, temperature, salinity, turbidity and conductivity) |
Horiba U-53 (serial no. LUAVCDWU) |
4.6
Monitoring Schedule for the Reporting Period
The schedule for impact water quality monitoring during the reporting period is provided in Appendix H3.
4.7
Results and Observations
A total of 13 monitoring events for impact water quality monitoring were conducted at all designated monitoring stations during the reporting period. Impact water quality monitoring results and graphical presentations were provided in Appendix H4.
Action and Limit Level exceedances were recorded for water quality impact monitoring in the reporting period and the Event and Action Plan (Appendix H5) was undertaken. Investigations on the action and limit level exceedances were conducted and summarised in Table 4.5 below.
Table 4.5: Details of Exceedances Recorded for Water Quality Monitoring
|
Date |
Parameter |
Station |
Type |
Justification |
|
2 Nov 2022 |
Turbidity |
TCW-WQM7 |
Action |
(a) (b) (c) (d) (e) |
|
7 Nov 2022 |
Suspended Solids |
TCW-WQM1 |
Limit |
(e) (f) |
|
Suspended Solids |
TCW-WQM7 |
Action |
(c) (e) (g) (h) (i) |
|
|
Turbidity |
Action |
(c) (e) (g) (h) (i) |
||
|
11 Nov 2022 |
Suspended Solids |
TCW-WQM1 |
Action |
(a) (b) (e) (j) |
|
28 Nov 2022 |
Suspended Solids |
TCW-WQM1 |
Action |
(a) (b) (e) (j) |
Remarks: (a) No deficiency in the practices of the implementation of the environmental mitigation measure was observed.
(b) No similar exceedance was recorded from the upstream of Tung Chung Stream.
(c) The existing surface drain along the site boundary of Area 42 has been intercepted and the construction runoff as collected from Area 42 was diverted to the wastewater treatment facility for treatment before discharge in accordance with Discharge Licence requirements. No deficiency in the practices of the implementation of the environmental mitigation measures was observed.
(d) The weather during the sampling day was rainy with Strong Wind Signal No. 3 issued and the river water flow was high in which the deposited sediment in the river bed could be re-suspended and washed downstream. This might attribute to the high turbidity at the monitoring station.
(e) No similar exceedance was recorded from the subsequent monitoring event.
(f) The cause of the elevated measurement result might due to the runoff from upstream locations since similar exceedance was recorded at upstream monitoring station.
(g) Silty water was observed at the existing storm drain outlets located at downstream of monitoring station TCW-WQM3A in which result in elevated measurement in turbidity and SS at TCW-WQM7. Contractor replied that the silty water might due to the wash-out of the residual mud inside the u-channel/drain pipes from the hill-side inlets along Tung Chung Road.
(h) The two outlets located within Area 42 to the Tung Chung Stream had been temporarily plugged in the dry season.
(i) Close monitoring of Tung Chung Stream to ensure that no muddy water as generated from the construction work of the Project was discharged into the Tung Chung Stream.
(j) No specific observations were made during the course of monitoring which might result in the exceedance in the measurement result.
Based on the investigation findings, the exceedances were considered not related to the Project.
Nevertheless, the Contractors were reminded to implement all relevant mitigation measures for the works, including provide periodic maintenance of construction plant and equipment as well as maintain good site practice. The ET will keep on checking monitoring data, plant, equipment and Contractors’ working methods.
5
Ecology
5.1
Monitoring
Requirements
According to the requirements in the Updated EM&A Manual, regular impact ecological monitoring in terms of water quality, aquatic invertebrate and fish species shall be carried out on a monthly basis at the designated monitoring locations during the construction period of the Project. Further details of the impact ecological monitoring are presented in the following sections.
5.2
Monitoring
Locations
A total of seven (7) monitoring stations at Tung Chung Stream covering both River Park and other Public Works (road crossings, polders, and stormwater attenuation and treatment ponds) were identified for the construction phase monitoring.
The locations of the monitoring stations are presented in Table 5.1 and Appendix I1. Note that the exact monitoring locations were subject to fine adjustment based on site conditions (e.g. adverse weather conditions, blockage by plants, rocks or other obstacles).
Table 5.1: Impact Ecological Monitoring Stations
|
Monitoring Station |
Description |
Coordinates |
|||
|
|
Easting |
Northing |
Latitude (N) |
Longitude (E) |
|
|
RP1 |
Conservation Zone (Natural Section) |
811150 |
814469 |
22°16'07.95"N |
113°55'59.41"E |
|
RP2 |
Upstream of River Park |
811083 |
814895 |
22°16'21.77"N |
113°55'57.05"E |
|
RP3 |
Revitalisation Zone (Channelised Section) |
811036 |
815076 |
22°16'27.66"N |
113°55'55.38"E |
|
RP4 |
Downstream of River Park |
810846 |
815402 |
22°16'38.25"N |
113°55'48.72"E |
|
PW1 |
Near Public Works |
811099 |
814589 |
22°16'11.83"N |
113°55'57.63"E |
|
PW2 |
Near Public Works |
810933 |
815318 |
22°16'35.54"N |
113°55'51.79"E |
|
PW3 |
Near Public Works |
810789 |
815658 |
22°16'46.56"N |
113°55'46.71"E |
5.3
Monitoring Frequency and Dates
As required under the Updated EM&A Manual, the impact ecological monitoring shall cover the full construction programme on a monthly basis. Table 5.2 summarises the frequency and monitoring dates for the impact monitoring during the reporting period.
Table 5.2: Impact Ecological Monitoring Schedule
|
Reporting Month |
River Park Study Area (RP1, RP2, RP3 and RP4) and Other Public Works Study Area (PW1, PW2 and PW3) |
|
Nov 2022 |
15 Nov 2022 |
5.4
Monitoring
Methodology
5.4.1
Stream Fauna
Several survey methods which covered different components of the stream fauna (which includes fish species and aquatic invertebrates) were used to monitor the study areas to yield a comprehensive result:
1. Direct Observation - covered all along the accessible part of the watercourse to provide a species list of fish and aquatic invertebrate with corresponding relative abundance.
2. Baited Fish Cage - At each sampling location, two replicates of baited fish cages were deployed for a duration of at least one hour. All collected fish and aquatic invertebrate species were recorded and their abundance were counted. This method may collect fishes which are wary of humans. Permit from the AFCD was obtained before the use of any equipment to collect stream fauna in any streams and watercourses.
3. Kick Sampling - at least two replicates of kick sampling were performed at each monitoring station to obtain aquatic invertebrate (and fish) samples. Kick sampling is a relatively quick method to survey aquatic invertebrates in shallow fast-flowing streams. A ~30 cm x ~30 cm kick sampler with ~0.5 mm mesh size was placed on the stream bed and the area just upstream of the sampler were vigorously disturbed by kicking for one minute. The contents of the net were transferred to suitable containers with freshwater for identification and counting in situ. All identifiable samples were released back to the sampling locations.
5.4.2
Water Quality
Ecologically related water quality monitoring, including in situ measurements and collection of water samples for laboratory analysis, was conducted at each monitoring location. Duplicate water samples were collected at surface water level at each monitoring location.
Water quality parameters including Dissolved Oxygen (in % saturation and mg/L), pH value, temperature, turbidity and salinity were measured in situ while the other parameters, including Suspended Solids (SS), Ammonia, Total Kjeldahl Nitrogen (TKN), Total Phosphorus (TP), Escherichia coli (E. coli), 5-day Biochemical Oxygen Demand (BOD5), Chemical Oxygen Demand (COD) and Oil & Grease, were measured at a HOKLAS accredited laboratory for water quality analysis. Other relevant data, including time, water depth, weather conditions and special phenomena or works underway in the vicinity were recorded.
The measured water quality parameters and laboratory testing method are shown in Table 5.3.
Table 5.3: Ecologically related Water Quality Monitoring Parameters and Testing Methods
|
Parameter |
|
|
|
In situ measurements |
Instrument Range Capability (1) |
Measurement Resolution |
|
pH |
0 – 14 pH units |
0.01 pH units |
|
Salinity |
0 – 70 ppt |
0.01 ppt |
|
Temperature |
-5 – 70°C |
0.1°C |
|
Turbidity |
0 – 4000 NTU |
0.1 NTU |
|
Dissolved Oxygen (DO) |
0 – 50 mg/L |
0.1 mg/L |
|
|
0 – 500% saturation |
0.1% saturation |
|
Laboratory testing and analyses |
Method Reference |
Level of Reporting |
|
Suspended Solids (SS) |
APHA 2540 D |
0.5 mg/L |
|
Ammonia as N |
APHA 4500 NH3 G |
0.01 mg/L |
|
Total Kjeldahl Nitrogen (TKN) as N |
APHA
4500 P: J; |
0.05 mg/L |
|
Total Phosphorus as P |
APHA 4500 P: J |
0.01 mg/L |
|
E. coli |
TM09/EC/10/98 Issue 3, HKEPD |
1 CFU/100mL |
|
5-day Biochemical Oxygen Demand (BOD5) |
APHA 5210 B |
1 mg/L |
|
Chemical Oxygen Demand (COD) |
APHA 5220 B |
2 mg/L |
|
Oil & Grease |
APHA 5520 B |
2 mg/L |
Note (1): Specifications based on YSI ProDSS Multiparameter Water Quality Meter
The equipment used for the in situ ecologically related water quality monitoring work is summarised in Table 5.4. Copies of the calibration certificates are attached in Appendix I2.
Table 5.4: Ecologically-related Water Quality Monitoring Equipment
|
Equipment |
Brand and Model |
|
Multifunctional Meter (in-situ measurement of DO, pH, temperature, salinity and turbidity) |
Horiba U-53 (serial no. X42XKBNO) |
5.5
Action and Limit
Levels
The Action and Limit Levels for the impact ecological monitoring are defined in Table 5.5.
Table 5.5: Action and Limit Levels for Impact Ecological Monitoring
|
Exceedance Level |
Description |
|
Action Level |
Reduction in the monthly taxa diversity (i.e. number of species) of fish or aquatic invertebrate (macroinvertebrate only) of any monitoring station compared to the corresponding monitoring season and station of the baseline survey by 30%. |
|
Limit Level |
Reduction in the monthly taxa diversity (i.e. number of species) of fish or aquatic invertebrate (macroinvertebrate only) of any monitoring station compared to the corresponding monitoring station and season of the baseline survey by 50%. |
For ease of reference, the Action and Limit Levels for aquatic invertebrate and fish (rounded to nearest 0.1) in Wet Season (April to October) and Dry Season (November to March) at each monitoring station are provided in Table 5.6 and Table 5.7 respectively.
Table 5.6: Action Level (AL) and Limit Level (LL) for Number of Aquatic Invertebrate Species at Each Monitoring Station during Wet (Apr - Oct) and Dry (Nov - Mar) Seasons
|
River Park Study Area |
Public Works Study Area |
|||||||
|
|
RP1 |
RP2 |
RP3 |
RP4 |
PW1 |
PW2 |
PW3 |
|
|
Wet season |
AL |
2.1 |
1.2 |
1.3 |
2.0 |
0.9 |
2.8 |
1.6 |
|
LL |
1.5 |
0.9 |
1.0 |
1.5 |
0.7 |
2.0 |
1.2 |
|
|
Dry season |
AL |
1.5 |
1.3 |
0.7 |
2.5 |
1.4 |
2.6 |
0.5 |
|
LL |
1.1 |
0.9 |
0.5 |
1.8 |
1.0 |
1.9 |
0.4 |
|
Table 5.7: Action Level (AL) and Limit Level (LL) for Number of Fish Species at Each Monitoring Station during Wet (Apr – Oct) and Dry (Nov – Mar) Seasons
|
River Park Study Area |
Public Works Study Area |
|||||||
|
|
RP1 |
RP2 |
RP3 |
RP4 |
PW1 |
PW2 |
PW3 |
|
|
Wet season |
AL |
3.6 |
3.5 |
0.9 |
5.0 |
2.8 |
0.9 |
4.4 |
|
LL |
2.6 |
2.5 |
0.7 |
3.6 |
2.0 |
0.7 |
3.2 |
|
|
Dry season |
AL |
4.1 |
3.5 |
0.1 |
4.3 |
4.7 |
0.5 |
4.2 |
|
LL |
2.9 |
2.5 |
0.1 |
3.1 |
3.4 |
0.4 |
3.0 |
|
5.6
Results and
Observations
5.6.1
Environment of Stream Courses
The environment of stream courses at the monitoring stations for the River Park Study Area (RP1 to RP4) and other Public Works Study Area (PW1 to PW3) are presented in Table 5.8.
Table 5.8: Environment of Stream Courses at each Monitoring Station
|
Station Name |
Location |
Physical Environment |
|
RP1 |
Conservation Zone (Natural Section) |
Fast flowing natural stream. The substrate was dominant with boulders and rocks, and sands were sometimes observed. Woodland with dense vegetation was on the river banks. |
|
RP2 |
Upstream of River Park |
Moderate fast flowing natural stream. The substrate was in the form of boulders, rocks, sand and silt mixture. Short but dense herbaceous vegetation was on the right bank of the stream, while dense woodland was on the left bank. |
|
RP3 |
Revitalisation Zone (Channelised Section) |
Slow flowing artificial, concretised and channelised stream. Pavement was the dominant substrate with little sand and rock. Short but dense herbaceous vegetation was on the river banks. A culvert was on the right bank of the stream, and a footbridge was on the upstream of the location. |
|
RP4 |
Downstream of River Park |
The channelised section of Tung Chung Stream ended at the upstream of RP4. RP4 is a moderate fast flowing natural stream close to the estuary. The substrate was in the form of boulders, rocks, sand and silt mixture. Woody plants and herbaceous plants were along the river banks. |
|
PW1 |
Near Public Works |
Fast flowing natural stream. The substrate was dominant with boulders and rocks, and sand was sometimes observed. Woodland with dense vegetation was on the river banks. |
|
PW2 |
Near Public Works |
Slow flowing artificial, concretised and channelised stream. Pavement was the dominant substrate with little sand and rock. Short but dense herbaceous vegetation was on the left bank of the stream, woody plants and herbaceous plants were on right bank of the river. |
|
PW3 |
Near Public Works |
A natural estuary. The substrate was dominant with sand and mud. Dense mangroves were on the shores of the estuary. |
5.6.2
Stream Fauna
A total of 14 aquatic invertebrate species and 19 fish species were recorded across all monitoring stations during the reporting period. The monitoring results for aquatic invertebrate and fish species are summarised in Table 5.9 and Table 5.10. The monitoring data is provided in Appendix I4 and Appendix I5. Representative photos of the species of conservation importance and other species recorded are presented in Appendix I3.
Table 5.9: Summary of Aquatic Invertebrate Species Recorded in the Reporting Period
|
Common Name |
Species Name |
River Park Study Area |
Public Works Study Area |
|||||
|
|
|
RP1 |
RP2 |
RP3 |
RP4 |
PW1 |
PW2 |
PW3 |
|
Small Minnow Mayfly |
Baetidae |
✔ |
✔ |
✔ |
|
✔ |
✔ |
|
|
Freshwater Snail |
Biomphalaria straminea |
|
|
|
|
|
✔ |
|
|
Mitten Crab |
Eriocheir japonica |
|
✔ |
|
|
|
|
|
|
Black-banded Gossamerwing (Larva) |
Euphaea decorata |
✔ |
|
|
|
✔ |
|
|
|
Caddisfly |
Hydropsychidae |
✔ |
|
|
|
✔ |
|
|
|
Freshwater Prawn |
Macrobrachium sp. |
✔ |
|
|
|
✔ |
|
|
|
European Physa |
Physella acuta |
|
|
✔ |
|
|
|
|
|
Smaller Water Strider |
Rhagovelia sp. |
✔ |
✔ |
✔ |
✔ |
✔ |
|
|
|
Caddisfly (Larva) |
Rhyacophilidae |
|
✔ |
|
|
|
|
|
|
Freshwater Snail |
Tarebia granifera |
|
|
✔ |
✔ |
|
|
|
|
Dropwings (Larva) |
Trithemis sp. |
|
|
✔ |
|
|
|
|
|
- |
Unidentified crab larva |
|
|
|
✔ |
|
✔ |
|
|
- |
Unidentified shrimp larva |
|
|
|
|
|
|
✔ |
|
Emerald Cascader (Larva) |
Zygonyx iris (1) |
|
|
|
|
|
✔ |
|
|
|
Total no. of species |
5 |
4 |
5 |
3 |
5 |
4 |
1 |
|
Action Level (Dry Season) |
1.5 |
1.3 |
0.7 |
2.5 |
1.4 |
2.6 |
0.5 |
|
|
Limit Level (Dry Season) |
1.1 |
0.9 |
0.5 |
1.8 |
1.0 |
1.9 |
0.4 |
|
Note (1): Species of conservation importance (Fellowes et. al., 2002)
Table 5.10: Summary of Fish Species Recorded in the Reporting Period
|
Common Name |
Species Name |
River Park Study Area |
Public Works Study Area |
|||||
|
|
|
RP1 |
RP2 |
RP3 |
RP4 |
PW1 |
PW2 |
PW3 |
|
Beijiang Thick-lipped Barb |
Acrossocheilus beijiangensis (1) |
✔ |
✔ |
|
|
✔ |
|
|
|
Asiatic Glassfish |
Ambassis sp. |
|
|
|
✔ |
|
|
|
|
Redbelly Tilapia |
Coptodon zillii |
|
|
|
|
|
|
✔ |
|
Common Silverbiddy |
Gerres oyena |
|
|
|
✔ |
|
|
✔ |
|
Fork Tongue Goby |
Glossogobius giuris |
|
|
|
✔ |
|
|
✔ |
|
Broken-band Hillstream Loach |
Liniparhomaloptera disparis |
✔ |
|
|
|
✔ |
|
|
|
Pond Loach |
Misgurnus anguillicaudatus |
|
|
✔ |
|
|
|
|
|
Mullet |
Mugilidae |
|
|
|
✔ |
|
|
✔ |
|
Mozambique Tilapia |
Oreochromis mossambicus |
|
|
|
|
|
|
✔ |
|
Rice Fish |
Oryzias curvinotus (1) |
|
|
|
✔ |
|
|
|
|
Predaceous Chub |
Parazacco spilurus (2) |
✔ |
✔ |
|
|
✔ |
|
|
|
Common Mudskipper |
Periophthalmus modestus |
|
|
|
|
|
|
✔ |
|
Sucker-belly Loach |
Pseudogastromyzon myersi |
✔ |
|
|
|
|
|
|
|
Javanese Fatnose Goby |
Pseudogobius javanicus |
|
|
|
|
|
|
✔ |
|
- |
Rhinogobius duospilus |
✔ |
✔ |
|
|
✔ |
|
|
|
Barcheek Goby |
Rhinogobius giurinus |
|
|
|
✔ |
|
|
|
|
Jarbua Terapon |
Terapon jarbua |
|
|
|
|
|
|
✔ |
|
Swordtail |
Xiphophorus hellerii |
✔ |
✔ |
✔ |
✔ |
✔ |
|
|
|
Variable Platyfish |
Xiphophorus variatus |
✔ |
✔ |
|
|
✔ |
✔ |
|
|
|
Total no. of species |
7 |
5 |
2 |
7 |
6 |
1 |
8 |
|
Action Level (Dry Season) |
4.1 |
3.5 |
0.1 |
4.3 |
4.7 |
0.5 |
4.2 |
|
|
Limit Level (Dry Season) |
2.9 |
2.5 |
0.1 |
3.1 |
3.4 |
0.4 |
3.0 |
|
Note (1): Species of conservation importance (Fellowes et. al., 2002)
Note (2): Species of conservation importance (Zheng & Wang,1998)
No exceedance of Action and Limit Levels was recorded for the impact ecological monitoring in the reporting period, comparing against the baseline monitoring data. No action was thus required to be undertaken in accordance with the Event and Action Plan presented in Appendix I6.
5.6.3
Water Quality
As the EM&A programme of TCW already has its own river water quality monitoring (i.e. 3 times per week, refer to Section 4 of this EM&A Report) and its associated Action and Limit Levels, this section of ecologically-related water quality monitoring results (i.e. at monthly basis) will be adopted for facilitating the investigation in case of any trigger of Action and Limit Levels of the ecological monitoring. The ecologically related water quality monitoring result during the reporting period is summarised in Appendix I7.
5.7
References
Fellowes, J., M. Lau, D. Dudgeon, G.T. Reels, G.W.J., Ades, G. Carey, B. Chan, K. Roger, K.S. Lee M. Leven, K. Wilson and Y.T. Yu. 2002. Wild animals to watch: terrestrial and freshwater fauna of conservation concern in Hong Kong. Memoirs of the Hong Kong Natural History Society. 25:123-159.
Zheng, G., and Wang, Q. 1998. China Red Data Book of Endangered Animals: Aves. Science Press, Beijing. China. 346pp.
6
Waste Management Status
6.1
General
The Contractors of Contracts 5 and 6 have each obtained a waste disposal billing account and registered as chemical waste producer. Sufficient numbers of receptacles were available for general refuse collection and sorting.
All dump trucks engaged on site were equipped with Real Time Tracking and Monitoring (RTTM) system during the reporting period. The Surveillance Team of the ET conducted regular site inspections on the dump trucks and their track records. No illegal dumping and landfilling of C&D materials was found during the reporting period.
Wastes generated during this reporting period include mainly non-inert construction wastes. Reference has been made to the waste flow tables prepared by the Contractors. The quantities of different types of wastes and imported fill materials are summarised in Table 6.1.
Table 6.1: Quantities of Different Waste Generated and Imported Fill Materials for TCW
|
Month / Year |
Inert C&D Materials(a) (in ‘000m3) |
Imported Fill Materials(d) (in ‘000m3) |
Inert Construction Waste Re-used in the Contract (in ‘000m3) |
Inert Construction Waste Re-used in other Projects(e) (in ‘000m3) |
Non-inert Construction Waste(b) (in ‘000m3) |
Recyclable Materials(c) (in ‘000kg) |
Chemical Waste (‘000kg) |
|
Sep 2022 |
22.30 |
1.49 |
0.83 |
13.62 |
0.51 |
9.939 |
0 |
|
Oct 2022 |
15.69 |
1.13 |
0.11 |
13.63 |
0.95 |
0.308 |
10 |
|
Nov 2022 |
10.44 |
0.22 |
0.09 |
7.14 |
0.63 |
0.284 |
0 |
Notes: (a) Inert construction and demolition wastes include hard rock and large broken concrete, and materials disposed as public fill.
(b) Non-inert construction wastes include general refuse disposed at landfill.
(c) Recyclable materials include metals, paper, cardboard, plastics and others.
(d) Imported fill materials include public fill.
(e) Inert Construction Waste reused in other construction contracts under TCNTE.
7
EM&A Site Inspection
7.1
Monitoring Requirements
Environmental site inspections were carried out on a weekly basis with the Contractors and ER to monitor the implementation of proper environmental pollution control and mitigation measures for air quality, noise, water quality, waste management, ecology and landscape and visual impacts under the Project.
7.2
Site Inspections and Key Observations
In the reporting period:
● Five (5) site inspections were carried out on 1, 11, 16, 22 and 29 November 2022 for Contract 5; and
● Five (5) site inspections were carried out on 3, 8, 17, 24 and 29 November 2022 for Contract 6.
Key observations during the site inspections are summarised in Table 7.1.
The Contractors were reminded to implement all relevant mitigation measures related to construction dust, construction noise, water quality, waste management, ecology and landscape and visual outlined in the EIA Report and the Updated EM&A Manual.
Table 7.1: Key Observations Identified during Site Inspections in this Reporting Period
|
Contract No. |
Inspection Date(s) |
Environmental Observation |
Recommendation / Remark |
|
Contract 5 |
1 Nov 2022 |
Area Part D in Ma Wan Chung and Part G Coastal Pedestrian Access ● No deficiency was observed |
● Nil |
|
11 Nov 2022 |
Area Part D, Part E in Ma Wan Chung and Part G Coastal Pedestrian Access ● No deficiency was observed |
● Nil |
|
|
16 Nov 2022 |
Area Part D in Ma Wan Chung ● No deficiency was observed |
● Nil |
|
|
22 Nov 2022 |
Area Part D and Part E in Ma Wan Chung ● No deficiency was observed |
● Nil |
|
|
29 Nov 2022 |
Area Part D and Part E in Ma Wan Chung and Part G Coastal Pedestrian Access ● No deficiency was observed |
● Nil |
|
|
Contract 6 |
3 Nov 2022 |
Area 46 in Tung Chung Valley ● Water discharge from existing storm drain outlets into the construction site was observed ● A copy of valid Environmental Permit was not observed Area 42 in Tung Chung Valley ● Notable fugitive dust was observed during the handling of construction materials ● Wheel-washing facility was not provided ● Accumulation of sludge was observed at the surface channel ● Drip tray was not provided for the containment of chemicals ● Wastewater treatment facility was found not in operation Temporary Bridge A ● Wheel washing facility was not provided Road L29 ● Insufficient sandbags along the roadside near to Tung Chung Stream was observed Tung Chung Stream ● Accumulation of mud and soil were observed at the river bed and river bank of Tung Chung Stream |
Area 46 in Tung Chung Valley ● Implement proper measures to prevent runoff from discharging into Tung Chung Stream ● Display a copy of valid Environmental Permit for public information in accordance with permit requirement Area 42 in Tung Chung Valley ● Ensure that the dust suppression measures for the construction activities are available and effective ● Provide and operate proper wheel-washing facility so that the dusty materials from its body and wheels of the site vehicles could be washed before departure from the construction site ● Carry out regular desludging of the sediment as accumulated in the surface channel to ensure that the channel can function properly ● Provide drip tray for the proper containment of chemicals ● Operate thew wastewater treatment facility to ensure the wastewater collected from the construction site should be properly treated in accordance with the Discharge Licence requirements before final discharge Temporary Bridge A ● Provide proper wheel washing facility to ensure that the soil as adhered on the body and wheels of the dump trucks are cleaned up before departure from the construction site Road L29 ● Provide sufficient sandbags along the roadside near to Tung Chung Stream to prevent surface runoff falling into the stream from the road Tung Chung Stream ● Clear up the mud and soil from the Tung Chung Stream |
|
|
8 Nov 2022 |
Area 46 in Tung Chung Valley ● Water discharge from existing storm drain outlets into the construction site was observed ● A copy of valid Environmental Permit was not observed Area 42 in Tung Chung Valley ● Notable fugitive dust was observed during the handling of construction materials ● Wheel-washing facility was not provided ● Accumulation of sludge was observed at the surface channel ● Drip tray was not provided for the containment of chemicals ● Wastewater treatment facility was found not in operation ● Temporary drainage pipe for diverting the surface runoff at the construction site to the communal drain was observed ● Surface runoff from the uphill area of Tung Chung Road was drained into the construction site Temporary Bridge A ● Wheel washing facility was not provided Road L29 ● Insufficient sandbags along the roadside near to Tung Chung Stream was observed Tung Chung Stream ● Accumulation of mud and soil were observed at the river bed and river bank of Tung Chung Stream Chung Mun Road ● Existing trees without proper protection was observed Visitor Centre ● Idled water pipe was observed at the side near to Tung Chung Stream |
Area 46 in Tung Chung Valley ● Implement proper measures to prevent runoff from discharging into Tung Chung Stream ● Display a copy of valid Environmental Permit for public information in accordance with permit requirement Area 42 in Tung Chung Valley ● Ensure that the dust suppression measures for the construction activities are available and effective ● Provide and operate proper wheel-washing facility so that the dusty materials from its body and wheels of the site vehicles could be washed before departure from the construction site ● Carry out regular desludging of the sediment as accumulated in the surface channel to ensure that the channel can function properly ● Provide drip tray for the proper containment of chemicals ● Operate thew wastewater treatment facility to ensure the wastewater collected from the construction site should be properly treated in accordance with the Discharge Licence requirements before final discharge ● Remove the drainage pipe and direct the wastewater to the wastewater treatment facilities before final discharge ● Direct the water to wastewater treatment facility for proper treatment before final discharge Temporary Bridge A ● Provide proper wheel washing facility to ensure that the soil as adhered on the body and wheels of the dump trucks are cleaned up before departure from the construction site Road L29 ● Provide sufficient sandbags along the roadside near to Tung Chung Stream to prevent surface runoff falling into the stream from the road Tung Chung Stream ● Clear up the mud and soil from the Tung Chung Stream Chung Mun Road ● Set up proper Tree Protection Zone (TPZ) to protect the existing trees to be retained or transplanted within the Project site. Visitor Centre ● Remove the idled water pipe from the area |
|
17 Nov 2022 |
Area 46 in Tung Chung Valley ● Water discharge from existing storm drain outlets into the construction site was observed ● A copy of valid Environmental Permit was not observed ● Improper site hoarding was observed Road L29 ● Pile without covering during the soldier piling work was observed
|
Area 46 in Tung Chung Valley ● Implement proper measures to prevent runoff from discharging into Tung Chung Stream ● Display a copy of valid Environmental Permit for public information in accordance with permit requirement ● Establish proper hoarding along the site boundary in accordance with the requirements of APCO Road L29 ● Ensure that the pile should be fully covered with the plastic covering during the soldier piling work |
|
|
24 Nov 2022 |
Area 46 in Tung Chung Valley ● Water discharge from existing storm drain outlets into the construction site was observed ● A copy of valid Environmental Permit was not observed ● Improper site hoarding was observed ● Footprint of concrete lorry washing next to the preserved tree was observed and sandbags as placed at the footing of the TPZ of the preserved tree were not observed Area 42 in Tung Chung Valley ● Cover for the treated materials stockpiled at the stockpiling area was not observed Road L29 ● Pile without covering during the soldier piling work was observed Temporary Bridge A ● No deficiency was observed |
Area 46 in Tung Chung Valley ● Implement proper measures to prevent runoff from discharging into Tung Chung Stream ● Display a copy of valid Environmental Permit for public information in accordance with permit requirement ● Establish proper hoarding along the site boundary in accordance with the requirements of APCO ● Arrange workshop training to remind the site staff of the preservation requirements of the trees which are to be retained at the site and deploy sandbags for the established TPZ Area 42 in Tung Chung Valley ● Cover the treated materials stockpiled at the stockpiling area with impermeable lining properly to prevent the ingress of rainwater and fugitive dust emission Road L29 ● Ensure that the pile should be fully covered with the plastic covering during the soldier piling work |
|
|
29 Nov 2022 |
Area 46 in Tung Chung Valley ● Water discharge from existing storm drain outlets into the construction site was observed ● A copy of valid Environmental Permit was not observed ● Improper site hoarding was observed ● Footprint of concrete lorry washing next to the preserved tree was observed and sandbags as placed at the footing of the TPZ of the preserved tree were not observed Area 42 in Tung Chung Valley ● Cover for the treated materials stockpiled at the stockpiling area was not observed Road L29 ● Pile without covering during the soldier piling work was observed |
Area 46 in Tung Chung Valley ● Implement proper measures to prevent runoff from discharging into Tung Chung Stream ● Display a copy of valid Environmental Permit for public information in accordance with permit requirement ● Establish proper hoarding along the site boundary in accordance with the requirements of APCO ● Arrange workshop training to remind the site staff of the preservation requirements of the trees which are to be retained at the site and deploy sandbags for the established TPZ Area 42 in Tung Chung Valley ● Cover the treated materials stockpiled at the stockpiling area with impermeable lining properly to prevent the ingress of rainwater and fugitive dust emission Road L29 ● Ensure that the pile should be fully covered with the plastic covering during the soldier piling work |
7.3
Landscape and Visual Mitigation Measures
Implementation of applicable landscape and visual mitigation measures (reference to the environmental protection measures MM1 to MM5, MM7 to MM8, MM18 to MM20 in Appendix C) was monitored in accordance with Manual. All measures undertaken by the Contractor during the construction phase and establishment work phase shall be audited by ET to ensure compliance with the intended aims of the measures.
The implementation status of the environmental protection measures is summarised below in Table 7.2. Examples of landscape and visual mitigation measures are shown in Table 7.3. The monitoring programme for detailed design, construction and establishment stages is presented in Table 7.4. Event and Action Plan for Landscape and Visual impacts is stated in Table 7.5.
Table 7.2: Landscape and Visual – Construction Phase Audit Summary
|
Landscape and Visual Mitigation Measures during Construction |
Implementation Status |
Relevant Contract(s) in the Reporting Period |
|
MM1- Optimization of Construction Areas & Providing Temporary Landscape on Temporary Construction |
The implementation of mitigation measures was checked by ET during weekly site inspection. Implementation of the measures by Contractors was observed. |
All works contracts |
|
MM2 - Minimize Topographical Changes |
||
|
MM3 - Preservation of Potentially Registerable OVTs, Rare and Protective Vegetation |
Tree Protection Specifications were provided in the relevant Contract Specifications respectively for implementation by the Contractors under the Project.
The Detailed Preservation and/or Translocation Plan for Plant Species of Conservation Importance was submitted under EP Condition 2.21 and accepted by EPD.
The Contractors’ performance on the implementation of the tree maintenance and protection measures were observed and checked by the ET weekly during construction period. |
All works contracts |
|
MM4 - Transplanting of Existing Trees |
Tree Transplanting Specifications were provided in the relevant Contract Specifications respectively for implementation by the Contractors under the Project where trees would unavoidably be affected by the construction works.
The Detailed Preservation and/or Translocation Plan for Plant Species of Conservation Importance was submitted under EP Condition 2.21 and accepted by EPD.
The Contractors were required to submit Method Statements for tree transplanting prior to the transplanting works. Tree inspections were conducted by ET to check the tree transplanting works implemented by the Contractors on site.
The Contractors’ performance on the implementation of trees maintenance and protection measures on transplanted trees were observed and checked by the ET bi-monthly during the 24-month establishment period after the completion of each batch of transplanting works. |
All works contracts |
|
MM5 – Screen Hoarding |
The implementation of mitigation measures was checked by ET during weekly site inspection. Implementation of the measures by Contractors was observed. |
All works contracts |
|
MM7 – Protection of Natural Rivers and Streams |
The implementation of mitigation measures was checked by ET during weekly site inspection. Implementation of the measures by Contractors was observed. |
Contract 6 |
|
MM8 - Preservation of Natural Coastline |
The implementation of mitigation measures was checked by ET during weekly site inspection. Implementation of the measures by Contractors was observed. |
Contract 5 |
|
MM18 - Landscaping on Slopes |
Not applicable during the reporting period |
Contract 5 |
|
MM19 - Landscape Treatment on Channelized Watercourses |
Not applicable during the reporting period |
Contract 6 |
|
MM20 - Lighting Control |
The implementation of mitigation measures was checked by ET during weekly site inspection. Implementation of the measures by Contractors was observed. |
All works contracts |
Table 7.3: Examples of Landscape and Visual Mitigation Measures in the Reporting Period
|
|
|
|
|
Erection of site hoardings around works area in unobtrusive colours |
General view of tree protection zone for retained tree |
Transplanting of existing trees to temporary nursery site |
|
|
|
|
|
Control of night-time lighting using light hooding |
|
|
Table 7.4: Monitoring Programme for Landscape and Visual
|
Stage |
Monitoring Task |
Monitoring Report |
Form of Approval |
Frequency |
|
Design |
Monitoring of design works against the recommendations of the landscape and visual impact assessments within the EIA should be undertaken by the Engineer and Landscape Architect, to ensure that they fulfil the intentions of the mitigation measures. Any changes to the design, including design changes on site should also be checked |
Report by CEDD / ER confirming that the design conforms to requirements of EP. |
Approved by CEDD |
At completion of design stage |
|
Construction |
Monitoring of the contractor’s operations during the construction period. |
Report on Contractor's compliance, by ET |
Counter signature of report by IEC |
Monthly |
|
Establishment Works |
Monitoring of the planting works during the 24-months Establishment Period after completion of the construction works. |
Report on Contractor's compliance by ET |
Counter signature of report by IEC |
Bi-monthly |
Table 7.5: Event and Action Plan for Landscape and Visual
|
Event Action Level |
Action |
|||
|
ET |
IEC |
ER |
Contractor |
|
|
Design Check |
Check final design conforms to the requirements of EP and prepare report. |
Check report. Recommend remedial design if necessary. |
Undertake remedial design if necessary. |
|
|
Non-conformity on one occasion |
Inform the IEC, ER and the Contractor Discuss remedial actions with IEC, ER and Contractor Monitor remedial actions until rectification has been completed. |
Check report. Check Contractor’s working method Discuss with ET, ER and Contractor on possible remedial measures. Advise ER on effective of proposed remedial measures. Check implementation of remedial measures. |
Confirm receipt of notification of non-conformity in writing Review and agree on the remedial measures proposed by the Contractor Ensure remedial measures are properly implemented. |
Identify source and investigate the non-conformity Amend working methods agreed with ER as appropriate Rectify damage and undertake any necessary replacement. |
|
Repeated Non-conformity |
Identify sources Inform the Contractor, IEC and ER Discuss inspection frequency Discuss remedial actions with IEC, ER and Contractor Monitor remedial actions until rectification has been completed If non-conformity stops, cease additional monitoring. |
Check inspection report Check Contractor’s working method Discuss with ET, ER and Contractor on possible remedial measures Advise ER on effectiveness of proposed remedial measures. |
Notify the Contractor In consultation with the ET and IEC, agree with the Contractor on the remedial measures to be implemented Supervise implementation of remedial measures. |
Identify source and investigate the non-conformity Amend working methods agreed with ER as appropriate Rectify damage and undertake any necessary replacement. Stop relevant portion of works as determined by ER until the non-conformity is abated. |
7.4
Land Contamination Assessment
Remediation works in Area 42 was being carried out in accordance with the Contamination Assessment Report (CAR) and Remediation Action Plan (RAP) as approved by EPD. Site Investigation in Chung Mun Road, Road L29 and Shek Mun Kap Road was completed in accordance with the Supplementary CAP as approved by EPD. CAR was submitted to EPD on 29 November 2022. Proposed site investigation of the remaining potentially contaminated areas identified in the approved EIA Report will be confirmed and conducted after approval of the further submission of the Supplementary CAP as necessary.
7.5
Monitoring for Compensation Woodland
Compensation Woodland Planting was completed in May 2022. With the approval from EPD on the monitoring proposal in October 2022, the monitoring for Compensation Woodland was commenced in November 2022. Photos of the Compensation Woodland planting are shown in Table 7.6.
Table 7.6: Photos of the Compensation Woodland Planting
|
|
|
7.6
Monitoring for Preserved/Transplanted Plant Species of
Conservation Importance
For the plant species of conservation importance within the works area of Contract 5, there were three (3) individuals of Gmelina chinensis, six (6) individuals of Aquilaria sinensis and five (5) individuals of Canthium dicoccum identified. One (1) individual of Gmelina chinensis, two (2) individuals of Aquilaria sinensis and two (2) individuals of Canthium dicoccum were recommended being preserved in-situ. The remaining individuals were recommended to be removed owing to poor form and structure condition.
As for the plant species of conservation importance within the works area of Contract 6, there were twelve (12) individuals of Aquilaria sinensis identified. Three (3) individuals of Aquilaria sinensis were recommended being preserved in-situ while two (2) individuals of Aquilaria sinensis were recommended being transplanted to the receptor site in accordance with the Preservation and/or Translocation Proposal for Plant Species of Conservation Importance submitted under section 3.1.1 of Detailed Preservation and/or Translocation Plan for Plant Species of Conservation Importance (Condition 2.21 of the EP No. EP-519/2016). The remaining individuals were recommended to be removed owing to poor form and structure condition.
7.6.1
Preserved Plant Species of Conservation Importance
Monthly monitoring of the in-situ preserved plant species of conservation importance by the Qualified Botanist (QB) appointed under Contract 5 and Contract 6 respectively were implemented in the reporting period. Termite track with live termites was recorded at one (1) individual of Aquilaria sinensis (Tree No. U043) under Contract 5. Insecticide was applied for the concerned plant as recommended by the QB appointed under Contract 5.
Tree protection zones for the in-situ preserved plant species of conservation importance were demarcated. No injuries and/or damages to the individuals of the in-situ preserved plant species of conservation importance were reported by the QB during the reporting period. Photographic record and tree schedule of the preserved plant species of conservation importance monitoring are provided in Appendix J.
The ET will continue to monitor the implementation of monitoring of in-situ preserved plant species of conservation importance.
7.6.2
Transplanted Plant Species of Conservation Importance
According to the Translocation Proposal for Plant Species of Conservation Importance for Contract 6 as submitted to EPD in October 2022, the translocation of the two (2) individuals of Aquilaria sinensis would be commenced in March 2023 tentatively.
8
Implementation Status of
Environmental Mitigation Measures
A summary of the Environmental Mitigation Implementation Schedule is presented in Appendix C. The necessary mitigation measures were implemented properly for the Project.
9
Summary of Exceedances of the
Environmental Quality Performance Limit
The monitoring results for air quality monitoring (1-hour TSP) complied with the Action/Limit levels in the reporting period.
No Limit Level exceedance was recorded for the construction noise monitoring in the reporting period. However, one (1) Action Level exceedance was triggered from one (1) environmental complaint related to noise nuisance received in the reporting period.
Four (4) Action Level exceedances and one (1) Limit Level exceedance were recorded for water quality impact monitoring in the reporting period. The investigations on the Action and Limit Level exceedances were conducted and the results were summarised in Section 4.7.
No Action/Limit Level exceedance was recorded for impact ecological monitoring in the reporting period.
Cumulative statistics on exceedance are summarised in Appendix K.
10
Summary of Complaints, Notification
of Summons and Successful Prosecutions
There was no notification of summons or prosecution recorded in the reporting period.
Four (4) environmental complaints related to Contract 6 were received in the reporting period. Investigations were being conducted for the environmental complaint in accordance with the complaint handling process as stated in the Complaint Management Plan. Environmental complaint in the reporting period is summarised in Table 10.1 below.
Table 10.1: Summary of Environmental Complaints
|
|
Complaint(s) |
Investigation/Follow up action(s) |
|
1 |
Environmental complaint related to Contract 6 regarding the tree cutting works along Chung Mun Road |
Tree felling works was in progress following the approved Tree Preservation and Removal Proposal (TPRP) and qualified person was appointed by Contractor to provide on-site supervision of the tree felling works. Tree Protection Zone was also provided for the trees which were to be retained at the construction site. To enhance the protection to the existing trees within the construction site, Contractor has implemented the following mitigation measures: 1. Water barriers with guard board were used to enclose the working area and additional notices would be posted to alert the public not to enter the site area; 2. All subcontractors and foreman had been reminded the matters to be aware of when conducting tree felling works during Site Safety and Environmental Committee Meeting. |
|
2 |
Environmental complaint related to Contract 6 regarding the suspected discharge of muddy water from construction sites into Tung Chung Stream |
Site formation at Area 42 and construction of Road L29 and Road L30 were being carried out in the vicinity of the concerned area. No improper discharge from their temporary drainage system was observed. Inspection at the concerned area was also carried out in the following days and no muddy water was observed. Contractor had taken the following actions: 1. The two outlets located within Area 42 to the Tung Chung Stream had been temporarily plugged in the dry season; 2. Surface runoff as drained into the construction site was collected and treated within Area 42 in accordance with Discharge Licence requirements before final discharge; 3. Close monitoring of Tung Chung Stream to ensure that no muddy water as generated from the construction work of the Project was discharged into the Tung Chung Stream. |
|
3 |
Environmental complaint related to Contract 6 regarding the construction noise nuisance as generated from the piling works in Shek Lau Po |
Pre-boring and sheet-piling works, site establishment and pedestrian road maintenance were carried out at the concerned area. No measurement exceedance was recorded from the impact noise monitoring. To minimise the potential noise impact to the nearby residents, Contractor has implemented the following mitigation measures: 1. Silenced type pilers were deployed to reduce the noise impact during sheet piling work; 2. Noise mitigation measures of the powered mechanical equipment as operated next to the sheet piling operation were enhanced if applicable so that the overall construction noise as generated from the construction site could be lowered if possible; 3. Sheet piling work would be carried out in intermittent manner and scheduled as agreed with nearby noise sensitive receivers including schools and domestic premises to minimise the noise impact; 4. Noise measurement would be carried out by Contractor to assess the construction noise impacts and the effectiveness of the noise mitigation measures as implemented; 5. Proper planning and working method for the future sheet piling works would be adopted. The sheet piles would be installed one by one instead of erection of an entire row of sheet piles to reduce the potential construction noise as generated from the resonance effect between the sheet piles. |
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4 |
Environmental complaint related to Contract 6 regarding suspected discharge of polluting effluent to Tung Chung Stream near Mun Tung Estate |
No improper discharge from the construction work of the Project was observed at the Tung Chung Stream. Contractor had implemented the following mitigation measures to prevent water pollution at Tung Chung Stream: 1. The two outlets located within Area 42 to the Tung Chung Stream had been temporarily plugged in the dry season; 2. Surface runoff as drained into the construction site was collected and treated within the site in accordance with Discharge Licence requirements before final discharge; 3. Sandbag barriers and water pumps had been provided on site to direct storm water to wastewater treatment facilities. |
Statistics on complaints, notifications of summons, successful prosecutions are summarised in Appendix K.
11
Future Key Issues
11.1
Construction Programme for the Coming Reporting Period
Works to be undertaken in the next monitoring period of December 2022 are summarised in Table 11.1 below, together with the key issues and the key mitigation measures.
The ET will keep track on the construction works to confirm compliance of environmental requirements and the proper implementation of all necessary mitigation measures. The ET will also recommend to the Contractors about the environmental toolbox topics on the abovementioned key issues for the next reporting period.
11.2
Monitoring Schedule for the Coming Reporting Period
The tentative schedules for environmental monitoring in December 2022 are provided in Appendix L.
Table 11.1: Major Activities for the next Reporting Period
|
Activities |
Key Issues |
Key Mitigation Measures |
|
Contract No. NL/2020/05 ("Contract 5") Tung Chung New Town Extension – Site Formation and Infrastructure Works at Ma Wan Chung |
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● Piling Work at Part D and Part H ● Slope Excavation and Soil Nail Installation at Part E ● Temporary ELS Works (Sheet-piling and excavation) at Part E and Part F ● Drainage Work (Excavation, Pipe Installation and Concreting) at Part E and Part F ● Sheet-piling Work at Part E ● Excavation for Drainage Work at Part E ● Excavation for Retaining Wall Construction at Part E ● Site Investigation and Pre-drilling at Part G ● Site Clearance at Part G ● Forming Site Access at Part G ● Excavation at Part H ● Retaining Wall Construction at Part H |
● Dust Emission ● Handling and storage of C&D materials generated from construction activities ● Noise from plant operation ● Emission of dark smoke from PMEs ● Efficiency of wastewater and drainage management ● Tree Protection |
● Good site practices ● Regular water spraying on stockpiles ● Provide tarpaulin sheets coverage on stockpiles ● Sorting and reuse of C&D materials as far as practicable ● Use of QPME and noise barrier/acoustic mat ● Regular maintenance of PMEs ● Implementation of wastewater and drainage management ● Retain and protect all existing trees and vegetation within the study area which are not directly affected by the works |
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Contract No. NL/2020/06 ("Contract 6") Tung Chung New Town Extension – Site Formation and Infrastructure Works at Tung Chung Valley, Phase 1 |
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● Site Clearance at Area 42, Road L29, Yu Tung Road, Chung Mun Road, Shek Mun Kap Road and Area 46 ● Remediation Works at the sites identified with contamination at Area 42 in accordance with the approved RAP ● Site Formation at the non-contamination sites at Area 42 ● Sorting of C&D materials and Backfilling at Area 42 ● Drainage Works at Area 42, Road L30, Visitor Centre, Yu Tung Road and Area 46 ● Excavation and Delivery of General Soil Offsite at Area 42 ● Breaking of Rock Materials at Area 42 ● Piling at Road L29 and Shek Mun Kap Road ● Road Works at Road L30 and Yu Tung Road ● Excavation Works at Visitor Centre ● Plate Load Test at Sewage Pumping Station-A ● Planter Maintenance and Grass Removal at Yu Tung Road ● Tree Removal at Chung Mun Road ● Proof Drilling Work at Chung Mun Road ● Drilling Works at Area 46 ● Breaking of Rock for Fill Material at Area 46 |
● Dust Emission ● Handling and storage of C&D materials generated from construction activities ● Noise from plant operation ● Emission of dark smoke from PMEs ● Efficiency of wastewater and drainage management ● Tree Protection |
● Good site practices ● Regular water spraying on stockpiles ● Provide tarpaulin sheets coverage on stockpiles ● Sorting and reuse of C&D materials as far as practicable ● Use of QPME and noise barrier/acoustic mat ● Regular maintenance of PMEs ● Implementation of wastewater and drainage management ● Retain and protect all existing trees and vegetation within the study area which are not directly affected by the works |
12
Conclusions and Recommendations
General
This EM&A Report presents the findings of the EM&A activities undertaken for the Project – i.e., Tung Chung New Town Extension (TCNTE) development in Tung Chung West (TCW) – during the period from 1 to 30 November 2022 in accordance with the Updated EM&A Manual and the requirements of the Environmental Permit (EP) (No. EP-519/2016).
Air Quality
No exceedance of Action/Limit Levels was recorded for the air quality monitoring (1-hour TSP) in the reporting period.
Noise
No exceedance of Limit Levels was recorded for the construction noise monitoring in the reporting period. However, one (1) Action Level exceedance was triggered from the receipt of one (1) environmental complaint related to noise nuisance in the reporting period.
Water Quality
No Project-related Action/Limit Level exceedance was recorded for water quality monitoring after investigation.
Ecology
No exceedance of Action/Limit Levels was recorded for impact ecological monitoring in the reporting period.
Environmental Site Inspections
Environmental site inspections were carried out during the reporting period. Recommendations on remedial actions were given to the Contractors for the deficiencies identified during the site inspections.
Environmental Complaint, Notification of Summons or Prosecution
There was no notification of summons or prosecution recorded in the reporting period.
Four (4) environmental complaints related to Contract 6 were received in the reporting period. Investigations were conducted for the environmental complaints in accordance with the complaint handling process as stated in the Complaint Management Plan.
Recommendations
The ET will keep track of the construction works to confirm compliance of environmental requirements and the proper implementation of all necessary mitigation measures.
Figures
