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
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 16
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 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 31 May 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 |
5 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 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 Action and Limit Levels was recorded for construction noise monitoring in the reporting period.
Breaches of Action and Limit Levels for Water Quality
Turbidity and Suspended Solids (SS) exceedances were recorded during the reporting period. Relevant investigations 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 environmental complaint, notification of summons or prosecution recorded in the reporting period.
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
· Demolition of Existing Structures, Pre-drilling Work and Piling Work at Part D;
· Ground Investigation and Installation of Geotechnical Instrumentation, Site Clearance, Slope Excavation and Soil Nail Installation, Temporary ELS Works, Road Diversion, Construction of Rock Fall Fence, Excavation for Drainage Work and Retaining Wall Construction and Sheet-piling Work at Part E;
· Trial Pit Excavation and Road Diversion at Part F;
· Geotechnical Investigation and Forming Site Access at Part G;
· Construction of Haul Road, Hoarding and Fencing Erection, Site Clearance, Trial Pit Excavation, Pre-drill for Piling Work and Piling Work at Part H;
Contract No. NL/2020/06 ("Contract 6") - Tung Chung Valley
· Site Investigation and sampling at the potential land contamination sites at Area 42 under EPD approved Supplementary Contamination Assessment Plan;
· Site Clearance and Site Formation at the non-contamination sites at Area 42;
· Site Clearance at Road L29 and Road L30;
· Backfilling for Ramp Formation at Temporary Bridge A;
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 31 May 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 |
Gary Yung |
2195 0847 |
|
|
Engineer |
Carol Lam |
2231 4472 |
|
|
Engineer’s Representative (ER) (Ove Arup and Partners Hong Kong Limited) |
Principal Resident Engineer |
Jackson Wong |
5699 5710 |
|
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 |
|
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 |
|
|
Deputy Project Manager / Superintendent |
Robert Luo |
9588 2485 |
|
|
|
Site Agent |
Jim Ko |
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 |
||
|
● Ground Investigation and Installation of Geotechnical Instrumentation at Part E ● Geotechnical Investigation Works at Part G ● Temporary ELS Works at Part E ● Road Diversion at Part E and F ● Construction of Rock Fall Fence at Part E ● Site Clearance at Part D and H ● Removal of Former Church Structure at Part D ● Construction of Haul Road at Part H ● Hoarding and Fencing Erection at Part E and H ● Trial Pit Excavation at Part F and H ● Temporary Drainage Diversion at Part E |
● 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 and Road L29 ● Site Survey at Sewage Pumping Station-A ● Sorting of C&D Materials at Area 42 ● Site Formation at the non-contamination sites at Area 42 ● Site Investigation and sampling at the potential land contamination sites at Area 42 under the EPD approved Supplementary Contamination Assessment Plan ● Decking of bridge at Temporary Bridge A ● Fencing Erection at Sewage Pumping Station-A ● Road Diversion at Road L30 ● Tree Planting and vegetation removal at Compensatory Woodland ● Tree Felling at Road L29 ● Plants removal at Yu Tung Road |
● 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) |
Site investigation in Area 42 was carried out in accordance with the Supplementary Contamination Assessment 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. |
|
Ecology |
|
|
Monitoring for Compensation Woodland |
To be conducted when compensation woodland is planted. |
|
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 |
To be conducted after preservation/transplantation. |
|
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 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 11 - 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 |
6, 11, 17, 23 & 27 May 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. 276019 and 6Z7784) |
|
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 |
24 |
13 – 43 |
266 |
500 |
|
DM-6 |
23 |
14 – 31 |
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 |
4, 13, 19, 26 & 31 May 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. 00710259) |
Larson Davis CAL200 (serial no. 11333) |
|
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 |
58^ |
54 – 61^ |
75 |
|
NMS-CA-6 |
53^ |
50 – 54^ |
|
|
NMS-CA-7 |
61 |
56 – 63 |
70 (65#(1) during school examination periods) |
|
NMS-CA-8 |
61 |
57 – 63 |
|
|
NMS-CA-9 |
61 |
59 – 62 |
Note: ^ +3dB(A) Façade correction included for Free Field measurement.
# No school examination was taken place at NMS-CA-9 during this reporting period.
(1) Reduced to 65 dB(A) during HKDSE examination periods at NMS-CA-7 and NMS-CA-8. HKDSE examination period took place from 22 Apr to 14 May. School examination took place at NMS-CA-7 from 16 May to 21 June.
The major 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 exceedance of Action and Limit Levels was recorded for construction noise monitoring in the reporting period. No action was thus required to be undertaken in accordance with the Event and Action Plan presented in Appendix G5.
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] |
811080 |
814965 |
|
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. |
3, 5, 7, 10, 12, 14, 16, 18, 20, 23, 25, 27 & 30 May 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 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 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 |
|
12 May 2022 |
Suspended Solids |
TCW-WQM1 |
Action |
(a) (b) (c) (d) (e) |
|
Suspended Solids |
TCW-WQM3A |
(a) (b) (c) (d) (e) |
||
|
Turbidity |
(a) (b) (c) (d) (e) |
Remarks: (a) No spillage incident in the Tung Chung Stream was reported by the Contractors.
(b) Elevated measurement results were recorded from the corresponding upstream monitoring stations of Tung Chung Stream, which indicated that the deterioration of the water quality was not due the activity at the vicinity of the monitoring stations.
(c) Rainy weather was recorded during the sampling day. High river water flow which might cause the resuspension of the deposited sediment in the river bed.
(d) 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 settling tank and reused on-site. No deficiency in the practices of the implementation of the environmental mitigation measures was observed.
(e) No similar exceedance was recorded from the subsequent monitoring event.
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) |
|
May 2022 |
18 May 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 5.5. 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. A truck with water pump was observed extracting water from the stream. |
|
RP3 |
Revitalisation Zone (Channelised Section) |
Slow flowing artificial, concretised and channelised stream. Pavement was the dominant substrate with little sand and rock. Algal mat was observed at this site. 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. Algal mat was observed at this site. 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 16 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 |
|
|
Scud |
Amphipoda |
|
|
|
|
|
|
✔ |
|
|
Small Minnow Mayfly |
Baetidae |
✔ |
✔ |
✔ |
|
✔ |
✔ |
|
|
|
Freshwater Shrimp |
Caridina cantonensis |
|
|
✔ |
|
|
✔ |
|
|
|
Hepu Mitten Crab |
Eriocheir hepuensis |
|
|
|
✔ |
|
|
|
|
|
Black-banded Gossamerwing (Larva) |
Euphaea decorata |
✔ |
|
|
|
✔ |
|
|
|
|
Caddisfly (Larva) |
Hydropsychidae |
✔ |
✔ |
|
|
✔ |
|
|
|
|
Caddisfly (Larva) |
Lepidostomatidae |
|
|
|
|
✔ |
|
|
|
|
Freshwater Prawn |
Macrobrachium sp. |
|
|
|
✔ |
|
|
|
|
|
Chinese Hooktail (Larva) |
Ophiogomphus sinicus |
|
|
|
|
✔ |
|
|
|
|
European Physa |
Physella acuta |
|
|
|
|
✔ |
|
|
|
|
Water Strider |
Ptilomera tigrina |
✔ |
|
|
✔ |
|
|
✔ |
|
|
Smaller Water Strider |
Rhagovelia sp. |
✔ |
|
|
|
|
✔ |
✔ |
|
|
Caddisfly (Larva) |
Rhyacophilidae |
|
✔ |
|
|
|
|
|
|
|
Freshwater Snail |
Tarebia granifera |
|
|
|
✔ |
|
|
|
|
|
|
Total no. of species |
5 |
3 |
2 |
4 |
6 |
3 |
3 |
|
|
Action Level (Wet Season) |
2.1 |
1.2 |
1.3 |
2.0 |
0.9 |
2.8 |
1.6 |
||
|
Limit Level (Wet Season) |
1.5 |
0.9 |
1.0 |
1.5 |
0.7 |
2.0 |
1.2 |
||
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) |
|
✔ |
|
|
✔ |
|
|
||||
|
Chinese Barb |
Barbodes semifasciolatus |
|
✔ |
|
✔ |
|
|
|
||||
|
Sharp-nosed Sand Goby |
Favonigobius gymnauchen |
|
|
|
|
|
|
✔ |
||||
|
Common Silverbiddy |
Gerres oyena |
|
|
|
|
|
|
✔ |
||||
|
Fork Tongue Goby |
Glossogobius giuris |
|
|
|
|
|
|
✔ |
||||
|
Broken-band Hillstream Loach |
Liniparhomaloptera disparis |
✔ |
✔ |
|
|
✔ |
|
|
||||
|
Mullet |
Mugilidae |
|
|
|
✔ |
|
|
✔ |
||||
|
Rice Fish |
Oryzias curvinotus (1) |
|
|
|
✔ |
|
|
|
||||
|
Predaceous Chub |
Parazacco spilurus (2) |
✔ |
✔ |
|
✔ |
✔ |
|
|
||||
|
Southern Platyfish |
Poecilia maculatis |
|
|
|
|
✔ |
|
|
||||
|
Sucker-belly Loach |
Pseudogastromyzon myersi |
✔ |
|
|
|
|
|
|
||||
|
- |
Rhinogobius duospilus |
✔ |
✔ |
|
|
|
|
|
||||
|
Jarbua Terapon |
Terapon jarbua |
|
|
|
|
|
|
✔ |
||||
|
Tilapia |
Tilaipia sp. |
|
|
|
|
|
|
✔ |
||||
|
Swordtail |
Xiphophorus hellerii |
|
✔ |
✔ |
✔ |
✔ |
✔ |
|
||||
|
Variable Platyfish |
Xiphophorus variatus |
|
|
|
|
✔ |
|
|
||||
|
|
Total no. of species |
4 |
6 |
1 |
5 |
6 |
1 |
6 |
||||
|
Action Level (Wet Season) |
3.6 |
3.5 |
0.9 |
5.0 |
2.8 |
0.9 |
4.4 |
|||||
|
Limit Level (Wet Season) |
2.6 |
2.5 |
0.7 |
3.6 |
2.0 |
0.7 |
3.2 |
|||||
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 (kg) |
|
Mar 2022 |
0.42* |
0.015 |
0 |
0.42* |
0.46 |
0.103 |
0 |
|
Apr 2022 |
3.99* |
2.53 |
0.93 |
3.06* |
0.46 |
0.103 |
0 |
|
May 2022 |
0.85 |
0 |
0 |
0.85 |
0.23 |
0.166 |
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.
(f) Updated figure for the previous month is reported and marked with an asterisk (*).
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 3, 11, 19, 24 and 31 May 2022 for Contract 5; and
● Five (5) site inspections were carried out on 5, 12, 17, 26 and 31 May 2022 for Contract 6.
Key observations during the site inspections are summarised in Table 7.1.
The Contractors have rectified all of the observations identified during environmental site inspections in the reporting period. 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 |
3 May 2022 |
Area Part D and Part E in Ma Wan Chung ● No deficiency was observed |
● Nil |
|
11 May 2022 |
Area Part D, Part E and Part H in Ma Wan Chung ● No deficiency was observed |
● Nil |
|
|
19 May 2022 |
Area Part D, Part E and Part H in Ma Wan Chung ● No deficiency was observed |
● Nil |
|
|
24 May 2022 |
Area Part D and Part E in Ma Wan Chung ● No deficiency was observed |
● Nil |
|
|
31 May 2022 |
Area Part D, Part E and Part H in Ma Wan Chung ● No deficiency was observed |
● Nil |
|
|
Contract 6 |
5 May 2022 |
Area 42 in Tung Chung Valley ● Hoarding was not extended along the site boundary Temporary Bridge A ● No deficiency was observed |
Area 42 in Tung Chung Valley ● The Contractor was urged to extend the hoarding along the site boundary. |
|
12 May 2022 |
Area 42 in Tung Chung Valley ● Hoarding was not extended along the site boundary Temporary Bridge A ● No deficiency was observed |
Area 42 in Tung Chung Valley ● The Contractor was urged to extend the hoarding along the site boundary. |
|
|
17 May 2022 |
Area 42 in Tung Chung Valley ● Hoarding was not extended along the site boundary ● Operation Manual was not observed at the wastewater treatment facilities ● Flow measuring device was not observed at the wastewater treatment facilities ● No drip tray was observed for the chemicals Compensatory Woodland ● No deficiency was observed |
Area 42 in Tung Chung Valley ● The Contractor was urged to extend the hoarding along the site boundary. ● The Contractor was urged to provide a copy of Operation Manual at the wastewater treatment facilities. ● The Contractor was urged to install a flow measuring device at the wastewater treatment facilities. ● The Contractor was urged to provide drip tray for the proper containment of chemicals. |
|
|
26 May 2022 |
Area 42 in Tung Chung Valley ● Flow measuring device was not observed at the wastewater treatment facilities Sewage Pumping Station-A and Temporary Bridge A ● No deficiency was observed |
Area 42 in Tung Chung Valley ● The Contractor was urged to install a flow measuring device at the wastewater treatment facilities. |
|
|
31 May 2022 |
Area 42 in Tung Chung Valley ● Flow measuring device was not observed at the wastewater treatment facilities ● Coverage and notice at the boreholes for Land Contamination Assessment was not observed Compensatory Woodland and Temporary Bridge A ● No deficiency was observed |
Area 42 in Tung Chung Valley ● The Contractor was urged to install a flow measuring device at the wastewater treatment facilities. ● The Contractor was urged to provide proper coverage and notice at the boreholes when the Land Contamination Assessment has not yet completed. |
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 Action/Limit Level exceedance was recorded for the construction noise monitoring in the reporting period.
Three (3) action level exceedances were recorded for water quality impact monitoring in the reporting period. The investigations on the action 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 J.
10
Summary of Complaints, Notification
of Summons and Successful Prosecutions
There was no environmental complaint, notification of summons or prosecution recorded in the reporting period.
Statistics on complaints, notifications of summons, successful prosecutions are summarised in Appendix J.
11
Future Key Issues
11.1
Construction Programme for the Coming Reporting Period
Works to be undertaken in the next monitoring period of June 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 June 2022 are provided in Appendix K.
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 |
||
|
● Ground Investigation and Installation of Geotechnical Instrumentation at Part E ● Site Clearance at Part E and H ● Geotechnical Investigation at Part G ● Forming Site Access at Part G ● Slope Excavation and Soil Nail Installation at Part E ● Temporary ELS Works at Part E ● Road Diversion at Part E and F ● Construction of Rock Fall Fence at Part E ● Excavation for Drainage Work at Part E ● Sheet-piling Work at Part E ● Excavation for Retaining Wall Construction at Part E ● Construction of Haul Road at Part H ● Hoarding and Fencing Erection at Part H ● Trial Pit Excavation at F and H ● Pre-drill for Piling Work at Part D and H ● Piling Work at Part D and H ● Demolition of Existing Structures at Part D |
● 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 and Road L30 ● Site Investigation and sampling at the potential land contamination sites at Area 42 under EPD approved Supplementary Contamination Assessment Plan ● Site Formation at the non-contamination sites at Area 42 ● Backfilling for Ramp Formation at Temporary Bridge A
|
● 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 31 May 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 Action/Limit Levels was recorded for the construction noise monitoring 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 environmental complaint, notification of summons or prosecution recorded in the reporting period.
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
