Contents
2.1.1 Monitoring Requirements and Equipment
2.1.2 Results and Observations
2.2.1 Monitoring Requirements and Equipment
2.2.2 Results and Observations
2.3.1 Monitoring Requirements and Equipment
2.3.2 Results and Observations
2.4.1 Egretry Monitoring Requirements
2.4.2 Egretry Monitoring Methodology
2.4.3 Results and Observations of Egretry Monitoring
2.8 Summary oF Complaints, Notification OF Summons AND Successful Prosecutions
Annex B Construction Programme
Annex C2 The graphical plots of the trends (AIR QUALITY MONITORING)
Annex c3 Event and action plan
Annex D1 The graphical plots of the trends (Noise MONITORING)
annex d2 event and action plan
Annex E1 The graphical plots of the trends (water quality MONITORING)
Annex G2 Mitigation Measures Implementation Status
List of Tables
Table 1.2 Contact Information of Key Personnel
Table 1.3 Major CONStRUCTION WORKS IN THE REPORTING PERIOD
Table 1.4 Summary of Status for the Environmental Aspects under the EM&A Manual
Table 2.1 Action and Limit Levels for Air Quality (Dust)
Table 2.2 Air Quality Monitoring Details
Table 2.3 Summary of 1-Hour RSP Monitoring Results in the Reporting Period
Table 2.4 Summary of 24-hour rolling average RSP Monitoring Results in the Reporting Period
Table 2.5 Summary of 24-hour rolling average FSP Monitoring Results in the Reporting Period
Table 2.6 Summary of EXCEEDANCES RECORDED FOR AIR QUALITY MONITORING in the reporting period
Table 2.7 Action and Limit Levels for Construction noise
Table 2.8 Noise Monitoring Details
Table 2.9 Summary of Construction Noise Monitoring Results in the Reporting Period
Table 2.10 Calculated Action and Limit Levels for Water Quality
Table 2.11 Locations of Impact Water Quality Monitoring Stations and Monitoring Requirements
Table 2.12 SUMMARY OF impact water quality MONITORING RESULTS IN THE REPORTING PERIOD
Table 2.13 Summary of EXCEEDANCES RECORDED FOR water QUALITY MONITORING in the reporting period
Table 2.14 number of nests and ardeids recorded at MPV Egretry
Table 2.15 usage of flight paths recorded at MPV egretry
Table 2.16 usage of flight paths and flight heights recorded at mpv egretry
Table 2.17 number of nests and ardeids recorded at MPLV Egretry
Table 2.18 usage of flight paths recorded at MPLV egretry
Table 2.19 usage of flight paths and flight heights recorded at mpLv egretry
Table 2.20 Key Observations Identified during the site inspection in this Reporting Month
List of Figures
FIGURE 2.7 Location of Egretry and 100m Buffer Area (recorded in EIA and in 2025)
Executive Summary
This is the Quarterly Environmental Monitoring and Audit (EM&A) Report presenting the EM&A works during the period of March 2026 - May 2026 for the San Tin Technopole Phase 1 Development (the Project) in accordance with the EM&A Manual. Two (2) works contracts, Package 1 Contract 1 (ND/2024/09) and Package 2 Contract 1 (ND/2024/10), are active in this reporting period.
· The construction of ND/2024/09 commenced on 29 September 2025; and
· The construction of ND/2024/10 commenced on 18 September 2025.
A summary of EM&A activities conducted in the reporting period is listed below:
Air Quality Monitoring Continuous impact monitoring
Noise Monitoring
• ND/2024/09 13 sessions
• ND/2024/10 13 sessions
Water Quality Monitoring
• ND/2024/09 37 sessions
• ND/2024/10 37 sessions
Ecological Monitoring 5 sessions for Pre-construction Site Check and Nest Control, 3 sessions for Mai Po Lung Village (MPLV) Egretry and 3 sessions for Mai Po Village (MPV) Egretry
Environmental Site Inspection
• ND/2024/09 13 sessions
• ND/2024/10 13 sessions
During the reporting period, the frequency of all monitoring works followed the requirements of the EM&A Manual, and all equipment used had valid calibration certificates. The weather conditions were predominantly sunny and partly cloudy, providing generally favorable circumstances for conducting impact monitoring of air quality, noise, and water quality.
Subject to the influence of ongoing river maintenance works in the San Tin Eastern Main Drainage Channel (STEMDC) affecting access and monitoring conditions at Station D1’, a temporary monitoring location (D1’T) along the same drainage channel system was adopted on 11 February 2026. Water quality monitoring was resumed at station D1’ starting from 25 March 2026.
Breaches of Action and Limit Levels for Air Quality
No Project-related Action or Limit level exceedance was recorded in the reporting period. A total of six (6) Action Level and fifty-eight (58) Limit Level exceedances were recorded for impact air quality monitoring, investigation was conducted, and all exceedances were confirmed to be not Project‑related. Therefore, no further action under the Event and Action Plan was required.
Breaches of Action and Limit Levels for Noise
No exceedance of Action and Limit Levels was recorded for impact noise monitoring in the reporting period.
Breaches of Action and Limit Levels for Water Quality
No Project-related Action or Limit level exceedance was recorded in the reporting period. A total of two (2) Action Level and twelve (12) Limit Level exceedances were recorded for impact water quality monitoring, investigation was conducted, and all exceedances were confirmed to be not Project‑related. Therefore, no further action under the Event and Action Plan was required.
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.
1. Introduction
1.1 Background
San Tin Technopole Phase 1 Development (“the Project”) mainly covers innovation & technology (I&T) land parcels to the north of San Tin Highway/Fanling Highway, some residential land to the south and the key infrastructure areas with road connections. The construction of the Project will be delivered under various works contracts and its scope of works comprises the following elements:
• Site formation of land for innovation and technology development, housing, community, commercial and other developments;
• Engineering infrastructure works including but not limited to roadworks, drainage, sewerage, waterworks, pumping stations, fresh water and flushing water service reservoirs, Common Utility Tunnel (CUT) and other associated buildings / structures / E&M systems for the Project; and
• Landscaping works;
The Environmental Impact Assessment (EIA) Report for the San Tin/Lok Ma Chau Development Node (STLMC DN) (Register No. AEIAR-261/2024) was approved on 17 May 2024. Two (2) works contracts, ND/2024/09 and ND/2024/10, are active in this reporting period. The construction of ND/2024/09 commenced on 29 September 2025, and the construction of ND/2024/10 commenced on 18 September 2025. The location of the Project, including the associated works areas of each active works contract is shown in Figure 1.1. The relevant Environmental Permits (EPs) under the Project and the respective works contracts are summarized in Table 1.1.
Table 1.1 Summary of Environmental Permits under the Project and the Respective Active Works Contracts
|
Designated Project |
Work Contracts |
||
|
ND/2024/09 |
ND/2024/10 |
||
|
EP-640/2024 |
San Tin / Lok Ma Chau Water Reclamation Plant |
P |
|
|
EP-641/2024 |
San Tin / Lok Ma Chau Effluent Polishing Plant |
P |
|
|
EP-664/2025 |
Revitalisation of San Tin Eastern Main Drainage Channel |
|
|
|
EP-665/2025 |
Recreational Development (“Open Space”) along San Tin Western Main Drainage Channel and at Mai Po Lung Village within Deep Bay Buffer Zone 2 |
|
|
|
EP-666/2025 |
New Primary Distributor Road (Road P1) and District Distributor Roads (Roads D1, D2, D3, D4, D5 and D6) for San Tin / Lok Ma Chau Development Node |
|
|
ERM-Hong Kong, Limited (ERM) is commissioned to undertake the role of Environmental Team (ET) for the Project in accordance with the requirements specified in the Environmental Permit(s), the Environmental Monitoring and Audit (EM&A) Manual, the EIA Report of the STLMC DN project and other relevant statutory requirements.
1.2 Scope of the EM&A Report
This is the Quarterly EM&A Summary Report for the Project which summarises the key findings of the EM&A programme during the reporting period from March 2026 to May 2026.
1.3 Organisation Structure
The organisation structure of the Project is shown in Annex A. The key personnel contact names and details are summarised in Table 1.2 below.
Table 1.2 Contact Information of Key Personnel
|
Party |
Position |
Name |
Telephone |
|
San Tin Technopole Project hotline |
-- |
-- |
3152 3537 |
|
Environmental Team (ET) (ERM-Hong Kong, Limited) |
ET Leader |
Raymond Chow |
2271 3281 |
|
|
ET Leader Representative (EP-640/2024) |
Manson Yeung |
2271 3012 |
|
|
ET Leader Representative (EP-641/2024) |
Pako Yu |
2271 3027 |
|
Independent Environmental Checker (IEC) (Mott MacDonald Hong Kong Limited) |
IEC |
Thomas Chan |
2828 5967 |
|
IEC Representative (EP-640/2024) |
Sunny Chan |
2828 5962 |
|
|
IEC Representative (EP-641/2024) |
Jay Chua |
2828 5710 |
|
|
Contract No. ND/2024/09 |
|||
|
Civil Engineering and Development Department |
Senior Engineer |
Vicky W.K. Yuen |
3426 2590 |
|
Engineer |
Stanley C.Y. Hung |
3152 3564 |
|
|
Engineer’s Representative (ER) (AECOM - Halcrow Joint Venture) |
Chief Resident Engineer |
Albert Yu |
8493 0329 |
|
Senior Resident Engineer |
Timonthy Chan |
8494 6981 |
|
|
Senior Resident Engineer |
Tony Chan |
8491 4870 |
|
|
Contractor (CR15G - Tung Lee Joint Venture) |
Construction Manager |
K. K. Yuen |
9498 1213 |
|
Site Agent |
Wilson Chan |
9656 8865 |
|
|
Sub Agent |
Paul So |
5989 0614 |
|
|
Environmental Officer |
Frank Liu |
6900 3526 |
|
|
Environmental Supervisor |
Johnny Kam |
6178 4786 |
|
|
Contract No. ND/2024/10 |
|||
|
Civil Engineering and Development Department |
Senior Engineer |
Albert S. Lam |
3547 1635 |
|
Engineer |
Patrick P.L. Wan |
3152 3472 |
|
|
Engineer’s Representative (ER) (Arup - Binnies Joint Venture) |
Chief Resident Engineer |
Victor Go |
2608 7688 |
|
Senior Resident Engineer |
Raymond Cheung |
2908 4924 |
|
|
Contractor (Kuly Construction & Engineering Company Limited) |
Senior Project Manager |
Ma Kin Man |
9552 1734 |
|
Site Agent |
Tang Wing Kai |
9300 7037 |
|
|
Environmental Officer |
Brenda Yiu |
9346 3966 |
|
1.4 Summary of Construction Works
As informed by the Contractor, details of the major construction works carried out in this reporting period are listed in Table 1.3. The construction programme is shown in Annex B.
Table 1.3 Major CONStRUCTION WORKS IN THE REPORTING PERIOD
|
March 2026 |
April 2026 |
May 2026 |
|
Contract No. ND/2024/09 |
||
|
• Site Formation works at Portion 1D-1 (Big Forest) • Site Formation works at Area C2 (Soccer Field) • Tree felling works • Ground Investigation (soil sampling) for contaminated soil treatment • GI works |
• Site Formation works at Portion 1D-1 (Big Forest) • Site Formation works at Area C2 (Soccer Field) • Tree felling works • Ground Investigation (soil sampling) for contaminated soil treatment • GI works |
• Site Formation Works (Area C) • Operation of Shredding Facilities • Archaeological Works (Area A and E) • Asbestos Survey • Ground Investigation (soil sampling) for contaminated soil treatment • GI works |
|
Contract No. ND/2024/10 |
||
|
• Ground Investigation Work • Construction for Box Culvert • Tree Felling |
• Ground Investigation Work • Construction for Box Culvert • Tree Felling |
• Ground Investigation Work • Construction for Box Culvert • Construction of Sewerage Pipe • Construction of Containment Wall |
1.5 Summary of EM&A Programme Requirements
The status for all environmental aspects is presented in Table 1.4. The EM&A programme requirements remained unchanged during the reporting period.
Table 1.4 Summary of Status for the Environmental Aspects under the EM&A Manual
|
Parameters |
Status |
|
Air Quality |
|
|
Impact Monitoring |
On-going for Contract Nos. ND/2024/09 and ND/2024/10, monitoring conducted continuously |
|
Noise |
|
|
Baseline Monitoring |
The results of baseline noise monitoring for Contract Nos. ND/2024/09 and ND/2024/10 and ND/2025/01 were reported in Baseline Monitoring Report and submitted to EPD under the EM&A Manual Section 16.3 and EP Condition 3.3. |
|
Impact Monitoring |
On-going for Contract Nos. ND/2024/09 and ND/2024/10, monitoring conducted once per week |
|
Water Quality |
|
|
Baseline Monitoring |
The results of baseline water quality monitoring for Contract Nos. ND/2024/09 and ND/2024/10 were reported in Baseline Monitoring Report and submitted to EPD under the EM&A Manual Section 16.3 and EP Condition 3.3. |
|
Impact Monitoring |
On-going for Contract Nos. ND/2024/09 and ND/2024/10, monitoring conducted 3 days per week |
|
Waste Management |
|
|
Waste Monitoring |
On-going |
|
Land Contamination |
|
|
Contamination Assessment Plan (CAP), Remediation Action Plan (RAP) and Remediation Report (RR) |
On-going |
|
Ecology |
|
|
Wetland Compensation Monitoring (Monitoring on Construction Phase Disturbance) |
The 12-month baseline monitoring was completed under NDO 08/2024 in November 2025. To be conducted when construction activities occur within 400m from the contiguous pond / wetland habitats on the northern portion of the Project area. |
|
Wetland Compensation Monitoring (Monitoring on Wetland Enhancement) |
The 12-month baseline monitoring was completed under NDO 08/2024 in November 2025. To be conducted at certain milestones between the commencement of pond filling and the full operation of San Tin Technopole. |
|
Night Roost Monitoring |
Pre-construction Night Roost Survey commenced in September 2025 and completed in March 2026, a standalone report for the survey will be prepared. |
|
Egretry Monitoring |
On-going between March and early September. |
|
Flight Corridor Monitoring |
To be conducted when construction activities occur within this flight corridor. |
|
Woodland Compensation Monitoring |
To be conducted after completion of compensatory planting. |
|
Post-transplantation / Post-seedling Planting Monitoring of Flora Species of Conservation Importance |
To be conducted after the transplantation / seedling planting. |
|
Post-translocation Monitoring of Fauna Species of Conservation Importance |
To be conducted after the translocation. |
|
Pre-construction Site Check and Nest Control |
Pre-construction Site Check and Nest Control commenced in March 2026 and on-going during the breeding season (March to July). The associated nest control measures to be conducted in non-breeding season (August to February) after pre-construction survey. A stand alone report will be prepared. |
|
Pre-construction Site Check for Eurasian Otter |
To be conducted prior to the commencement of construction activities. |
|
Wildlife Corridor Monitoring |
To be conducted upon establishment of the wildlife corridors. |
|
Site Environmental Audit |
|
|
Regular Site Inspection |
On-going |
|
Environmental Log Book |
On-going |
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. Details of the EP submissions status shall be referred to corresponding EM&A reports.
1.6 Status of other Statutory Environmental Requirement
The environmental licenses and
permits, including EP, discharge license under Water Pollution Control
Ordinance, registration as chemical waste producer, construction noise permit
and specified processes license, which were valid in the reporting period are
presented in corresponding EM&A monthly report. No
non-compliance with environmental statutory requirements was recorded in the
reporting period.
2. Monitoring Results
2.1 Air Quality Monitoring
2.1.1 Monitoring Requirements and Equipment
According to the EM&A Manual of the Project, impact air quality monitoring in terms of 1-hour average Respirable Suspended Particulate (RSP), 24-hour rolling average RSP and 24-hour rolling average Fine Suspended Particulate (FSP) concentrations, was conducted continuously with air sensors. The results of these monitoring parameters are compared with the corresponding Action and Limit levels listed in Table 2.1.
Table 2.1 Action and Limit Levels for Air Quality (Dust)
|
Parameter |
Action Level |
Limit Level |
|
1-hour RSP |
150 μg/m3 |
Not applicable |
|
24-hour RSP (rolling average) |
Not applicable |
100 μg/m3 |
|
24-hour FSP (rolling average) |
Not applicable |
50 μg/m3 |
The monitoring locations and air sensors used in the continuous impact air quality monitoring are summarised in Table 2.2 and illustrated in Figure 2.1. The copies of the calibration certificates for the onsite air sensors at the monitoring stations and the transfer standards shall be referred to corresponding Monthly EM&A reports.
Table 2.2 Air Quality Monitoring Details
|
Monitoring Station |
Relevancy to Works Contract |
Location |
Equipment |
|
M03 |
ND/2024/10 |
Pun Uk Tsuen |
MAS-Dust (S/N: dev9204Z250700007) |
|
M04 |
ND/2024/10 |
Chau Tau Tsuen |
MAS-Dust (S/N: dev9204Z250700006) |
|
M06 |
ND/2024/09 |
Mai Po San Tsuen |
MAS-Dust (S/N: dev9204Z250800014) |
|
M09 |
ND/2024/10 |
Wing Ping Tsuen |
MAS-Dust (S/N: dev9204Z250700005) |
|
M11 |
ND/2024/09 |
Shek Wui Wai |
MAS-Dust (S/N: dev9204Z250800013) |
|
M13 |
ND/2024/09 |
Rolling Hills (rooftop area) |
MAS-Dust (S/N: dev9204Z250800016) |
|
M14 |
ND/2024/09 |
Rolling Hills (outside of Rolling Hills) |
MAS-Dust (S/N: dev9204Z250800015) |
|
M15a (a) |
ND/2024/09 |
The STEP |
MAS-Dust (S/N: dev9204Z250900019) |
(a) The permission from the property management office of M15a – The STEP has been granted in October 2025. The air quality monitoring at M15a commenced on 18 October 2025.
2.1.2 Results and Observations
During the reporting period, weather conditions were predominantly sunny and partly cloudy, providing generally favorable circumstances for conducting impact monitoring of air quality. Wind conditions during the reporting period extracted from the Hong Kong Observatory (HKO)’s weather station at Wetland Park are presented in Annex C1. Starting from April 2026, wind data were extracted directly from the Hong Kong Observatory (HKO) via DATA.GOV.HK to ensure completeness and accuracy.
The monitoring data for 1-hour RSP, 24-hour rolling average RSP and 24-hour rolling average FSP concentrations in the reporting period are summarized in Table 2.3 to Table 2.5. Major dust sources in the reporting period included haul road traffic and earth moving construction activities associated with the site formation works and tree felling works. The graphical plots of the trends of monitored parameters (the last month of the previous quarter and the present quarter) are provided in Annex C2.
Table 2.3 Summary of 1-Hour RSP Monitoring Results in the Reporting Period
|
Monitoring Station |
Average (µg/m3) |
Range (µg/m3) |
Action Level (µg/m3) |
Limit Level (µg/m3) |
|
M03 |
10.4 |
1.0 - 64.4 |
150 |
Not applicable |
|
M04 |
20.0 |
3.4 - 69.8 |
150 |
Not applicable |
|
M06 |
22.3 |
2.4 - 182.8 |
150 |
Not applicable |
|
M09 |
20.6 |
5.1 - 85.4 |
150 |
Not applicable |
|
M11 |
24.4 |
4.8 - 176.4 |
150 |
Not applicable |
|
M13 |
23.9 |
3.8 - 203.0 |
150 |
Not applicable |
|
M14 |
19.0 |
2.9 - 136.4 |
150 |
Not applicable |
|
M15a |
14.5 |
1.8 - 174.9 |
150 |
Not applicable |
Table 2.4 Summary of 24-hour rolling average RSP Monitoring Results in the Reporting Period
|
Monitoring Station |
Average (µg/m3) |
Range (µg/m3) |
Action Level (µg/m3) |
Limit Level (µg/m3) |
|
M03 |
10.3 |
2.0 - 39.0 |
Not applicable |
100 |
|
M04 |
19.9 |
6.6 - 46.2 |
Not applicable |
100 |
|
M06 |
22.2 |
5.7 - 51.7 |
Not applicable |
100 |
|
M09 |
20.5 |
6.9 - 58.5 |
Not applicable |
100 |
|
M11 |
24.4 |
8.5 - 64.7 |
Not applicable |
100 |
|
M13 |
23.8 |
5.7 - 67.0 |
Not applicable |
100 |
|
M14 |
18.9 |
4.9 - 43.4 |
Not applicable |
100 |
|
M15a |
14.4 |
2.9 - 38.7 |
Not applicable |
100 |
Table 2.5 Summary of 24-hour rolling average FSP Monitoring Results in the Reporting Period
|
Monitoring Station |
Average (µg/m3) |
Range (µg/m3) |
Action Level (µg/m3) |
Limit Level (µg/m3) |
|
M03 |
8.2 |
1.6 - 31.1 |
Not applicable |
50 |
|
M04 |
15.7 |
4.5 - 42.5 |
Not applicable |
50 |
|
M06 |
17.7 |
4.4 - 46.3 |
Not applicable |
50 |
|
M09 |
17.8 |
5.4 - 54.2 |
Not applicable |
50 |
|
M11 |
20.6 |
4.9 - 58.2 |
Not applicable |
50 |
|
M13 |
20.0 |
4.7 - 61.2 |
Not applicable |
50 |
|
M14 |
14.2 |
3.3 - 40.4 |
Not applicable |
50 |
|
M15a |
13.2 |
2.6 - 35.2 |
Not applicable |
50 |
No Project-related Action or Limit level exceedance was recorded in the reporting period. A total of six (6) Action Level and fifty-eight (58) Limit Level exceedances were recorded for impact air quality monitoring, investigation was conducted, and all exceedances were confirmed to be not Project‑related. Therefore, no further action under the Event and Action Plan was required in accordance with the Event and Action Plan presented in Annex C3. Details of exceedances recorded in the reporting period were summarized in Table 2.6 below.
Table 2.6 Summary of EXCEEDANCES RECORDED FOR AIR QUALITY MONITORING in the reporting period
|
Month |
Monitoring Station |
Parameter |
Exceedance Level |
No. of exceedance(s) |
Date & Time period |
|
March 2026 |
M06 |
1-hour RSP |
Action Level |
1 |
15 Mar 2026 23:00 – 15 Mar 2026 23:59 |
|
|
M11 |
1-hour RSP |
Action Level |
2 |
15 Mar 2026 19:00 – 15 Mar 2026 19:59 15 Mar 2026 23:00 – 15 Mar 2026 23:59 |
|
|
M13 |
1-hour RSP |
Action Level |
2 |
15 Mar 2026 22:00 – 15 Mar 2026 22:59 15 Mar 2026 23:00 – 15 Mar 2026 23:59 |
|
|
M15a |
1-hour RSP |
Action Level |
1 |
15 Mar 2026 23:00 – 15 Mar 2026 23:59 |
|
|
M11 |
24-hour rolling average FSP |
Limit Level |
19 |
15 Mar 2026 02:00 – 16 Mar 2026 01:59 15 Mar 2026
03:00 – 16 Mar 2026 02:59 15 Mar 2026 04:00 – 16 Mar 2026 03:59 15 Mar 2026
05:00 – 16 Mar 2026 04:59 15 Mar 2026 06:00 – 16 Mar 2026 05:59 15 Mar 2026
07:00 – 16 Mar 2026 06:59 15 Mar 2026 08:00 – 16 Mar 2026 07:59 15 Mar 2026
09:00 – 16 Mar 2026 08:59 15 Mar 2026 10:00 – 16 Mar 2026 09:59 15 Mar 2026
11:00 – 16 Mar 2026 10:59 15 Mar 2026 12:00 – 16 Mar 2026 11:59 15 Mar 2026
13:00 – 16 Mar 2026 12:59 15 Mar 2026 14:00 – 16 Mar 2026 13:59 15 Mar 2026
15:00 – 16 Mar 2026 14:59 15 Mar 2026 16:00 – 16 Mar 2026 15:59 15 Mar 2026
17:00 – 16 Mar 2026 16:59 15 Mar 2026 18:00 – 16 Mar 2026 17:59 15 Mar 2026
19:00 – 16 Mar 2026 18:59 15 Mar 2026 20:00 – 16 Mar 2026 19:59 |
|
April 2026 |
M09 |
24-hour rolling average FSP |
Limit Level |
1 |
18 Apr 2026 00:00 – 18 Apr 2026 23:59
|
|
|
M13 |
24-hour rolling average FSP |
Limit Level |
7 |
17 Apr 2026 18:00 – 18 Apr 2026 17:59 17 Apr 2026 19:00 – 18 Apr 2026 18:59 17 Apr 2026 20:00 – 18 Apr 2026 19:59 17 Apr 2026 21:00 – 18 Apr 2026 20:59 17 Apr 2026 22:00 – 18 Apr 2026 21:59 17 Apr 2026 23:00 – 18 Apr 2026 22:59 18 Apr 2026 00:00 – 18 Apr 2026 23:59
|
|
|
M09 |
24-hour rolling average FSP |
Limit Level |
12 |
18 Apr 2026 01:00 – 19 Apr 2026 00:59 18 Apr 2026 02:00 – 19 Apr 2026 01:59 18 Apr 2026 03:00 – 19 Apr 2026 02:59 18 Apr 2026 04:00 – 19 Apr 2026 03:59 18 Apr 2026 05:00 – 19 Apr 2026 04:59 18 Apr 2026 06:00 – 19 Apr 2026 05:59 18 Apr 2026 07:00 – 19 Apr 2026 06:59 18 Apr 2026 08:00 – 19 Apr 2026 07:59 18 Apr 2026 09:00 – 19 Apr 2026 08:59 18 Apr 2026 10:00 – 19 Apr 2026 09:59 18 Apr 2026 11:00 – 19 Apr 2026 10:59 18 Apr 2026 12:00 – 19 Apr 2026 11:59
|
|
|
M13 |
24-hour rolling average FSP |
Limit Level |
19 |
18 Apr 2026 01:00 – 19 Apr 2026 00:59 18 Apr 2026 02:00 – 19 Apr 2026 01:59 18 Apr 2026 03:00 – 19 Apr 2026 02:59 18 Apr 2026 04:00 – 19 Apr 2026 03:59 18 Apr 2026 05:00 – 19 Apr 2026 04:59 18 Apr 2026 06:00 – 19 Apr 2026 05:59 18 Apr 2026 07:00 – 19 Apr 2026 06:59 18 Apr 2026 08:00 – 19 Apr 2026 07:59 18 Apr 2026 09:00 – 19 Apr 2026 08:59 18 Apr 2026 10:00 – 19 Apr 2026 09:59 18 Apr 2026 11:00 – 19 Apr 2026 10:59 18 Apr 2026 12:00 – 19 Apr 2026 11:59 18 Apr 2026 13:00 – 19 Apr 2026 12:59 18 Apr 2026 14:00 – 19 Apr 2026 13:59 18 Apr 2026 15:00 – 19 Apr 2026 14:59 18 Apr 2026 16:00 – 19 Apr 2026 15:59 18 Apr 2026 17:00 – 19 Apr 2026 16:59 18 Apr 2026 18:00 – 19 Apr 2026 17:59 18 Apr 2026 19:00 – 19 Apr 2026 18:59 |
|
May 2026 |
N/A |
N/A |
N/A |
N/A |
N/A |
2.2 Noise Monitoring
2.2.1 Monitoring Requirements and Equipment
According to the EM&A Manual of the Project, noise impact monitoring was conducted once per week during the construction phase of the Project. The Action and Limit Levels for construction noise of the Project are provided in Table 2.7 below.
Table 2.7 Action and Limit Levels for Construction noise
|
Time Period |
Action Level |
Limit Level |
|
0700 - 1900 hours on normal weekdays |
When one documented complaint is received |
75 dB(A)(a),(b) |
Note:
(a) If works are to be carried out during restricted hours, the conditions stipulated in the Construction Noise Permit (CNP) issued by the Noise Control Authority have to be followed.
(b) 70 dB(A) and 65 dB(A) for schools during normal teaching periods and school examination periods, respectively.
Noise monitoring was performed using sound level meter at the designated monitoring stations provided in Table 2.8 and Figure 2.2. The copies of the calibration certificates for the equipment shall be referred to corresponding Monthly EM&A reports.
Table 2.8 Noise Monitoring Details
|
Monitoring Station |
Relevancy to Works Contract |
Location |
Parameter and Frequency |
Type of Measurement |
|
|
|
|||
|
CM1 |
ND/2024/09 |
69 Mai Po San Tsuen |
30-minute measurement between 0700 and 1900 on normal weekdays (Monday to Saturday) Once per week for 30 mins during the construction period of the relevant works contracts of the Project |
Free field |
|
CM3 |
ND/2024/09 |
Scenic Heights Block B2 |
Free field |
|
|
CM4 |
ND/2024/09 |
30 Rolling Hills Phase II |
Façade |
|
|
CM9 |
ND/2024/10 |
285B Wing Ping Tsuen |
Free field |
|
|
CM10 |
ND/2024/10 |
291 Chau Tau Tsuen |
Free field |
|
|
CM11 |
ND/2024/10 |
218 Chau Tau Tsuen |
Free field |
2.2.2 Results and Observations
During the reporting period, weather conditions were predominantly sunny and partly cloudy, providing generally favorable circumstances for conducting impact monitoring of noise. Results for noise monitoring are summarised in Table 2.9. Major noise sources during the noise monitoring included noise from use of Powered Mechanical Equipment (PME) for pile wall construction, tree felling, demolition and site formation works. The graphical plots of the trends of monitored parameters (the last month of the previous quarter and the present quarter) are provided in Annex D1.
Table 2.9 Summary of Construction Noise Monitoring Results in the Reporting Period
|
Monitoring Station |
Average, dB(A), |
Range, dB(A), Leq (30 min) |
Limit Level, dB(A), Leq (30 min) |
|
CM1 (a) |
70.3 |
68.7 - 71.6 |
75 |
|
CM3 (a) |
53.4 |
49.5 - 55.5 |
75 |
|
CM4 |
46.5 |
43.6 - 50.0 |
75 |
|
CM9 (a) |
64.9 |
62.5 - 68.1 |
75 |
|
CM10 (a) |
58.0 |
54.8 - 60.3 |
75 |
|
CM11 (a) |
54.4 |
51.5 - 56.5 |
75 |
Note(s):
(a) A correction of +3 dB(A) was made to the free field measurements.
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 Annex D2.
2.3 Water Quality Monitoring
2.3.1 Monitoring Requirements and Equipment
Water quality impact monitoring was carried out to ensure that any deterioration of water quality was detected, and that timely action was taken to rectify the situation if the deterioration of water quality is caused by the Project. Impact water quality monitoring was undertaken three days per week during the reporting period in accordance with the EM&A Manual. Each water quality impact monitoring was scheduled such that the interval between two water quality impact monitoring was more than 36 hours to record representative water quality data throughout the week.
Two (2) replicate in-situ measurements and samples were collected at each monitored water depth of each designated monitoring stations. Dissolved Oxygen (DO), pH value, salinity, temperature and turbidity were measured in-situ whereas the level of suspended solids (SS) were determined by SGS Hong Kong Limited which is a HOKLAS accredited laboratory.
The calculated Action and Limit Levels of water quality monitoring with reference to the Baseline Water Quality Monitoring Report are provided in Table 2.10.
Table 2.10 Calculated Action and Limit Levels for Water Quality
|
Parameter |
Action Level |
Limit Level |
|
San Tin Eastern Main Drainage Channel (STEMDC) - Station D1’ |
||
|
DO in mg/L (a) |
1.2 mg/L |
1.2 mg/L |
|
SS in mg/L (b), (c) |
105 mg/L, or 120% of upstream control station’s (U1a) SS recorded on the same day |
113 mg/L, or 130% of upstream control station's (U1a) SS recorded on the same day |
|
Turbidity in NTU (b), (c) |
97 NTU, or 120% of upstream control station’s (U1a) turbidity recorded on the same day |
102 NTU, or 130% of upstream control station's (U1a) turbidity recorded on the same day |
|
San Tin Western Main Drainage Channel (STWMDC) - Stations D2a, D2b’, D2c and D2d |
||
|
DO in mg/L (a) |
1.3 mg/L |
1.1 mg/L |
|
SS in mg/L (b), 3 |
38 mg/L, or 120% of upstream control stations’ (U2a and U2b) SS recorded on the same day |
46 mg/L, or 130% of upstream control stations’ (U2a and U2b) SS recorded on the same day |
|
Turbidity in NTU (b), (c) |
42 NTU, or 120% of upstream control stations’ (U2a and U2b) turbidity recorded on the same day |
52 NTU, or 130% of upstream control stations’ (U2a and U2b) turbidity recorded on the same day |
|
Small Watercourses along Sam Tam Road - Station D7 |
||
|
DO in mg/L (a) |
0.6 mg/L |
0.6 mg/L |
|
SS in mg/L (b) |
5 mg/L |
5 mg/L |
|
Turbidity in NTU (b) |
11 NTU |
12 NTU |
|
Small Watercourses near Mai Po Village - Station D8 |
||
|
DO in mg/L (a) |
1.4 mg/L |
1.2 mg/L |
|
SS in mg/L (b) |
7 mg/L |
8 mg/L |
|
Turbidity in NTU (b) |
12 NTU |
13 NTU |
Note(s):
(a) For DO, non-compliance of the water quality limits occurs when monitoring result is lower than the limits.
(b) For SS and turbidity, non-compliance of the water quality limits occurs when monitoring result is higher than the limits
(c) For clarity, the exceedance of Action / Limit Levels for SS and turbidity is considered to occur when both the baseline percentile criteria (based on 95%-ile / 99%-ile of collected baseline data) and control station criteria (based on 120% / 130% of control station data collected on the same day during impact monitoring) are exceeded. In case more than one upstream control station is involved, the higher number would be considered as the control criteria. Exceeding either the baseline percentile criteria or control station criteria alone does not constitute the exceedance of the corresponding Action / Limit Levels.
The locations of the monitoring stations under works contracts ND/2024/09 and ND/2024/10 are shown in Figure 2.3 and Table 2.11. The copies of the calibration certificates for the equipment shall be referred to corresponding Monthly EM&A reports.
Environmental site audits, including weekly site inspections of construction works by representatives from ET, Engineer and Contractor; and joint site inspection with Independent Environmental Checker (IEC) were conducted during 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.
Table 2.11 Locations of Impact Water Quality Monitoring Stations and Monitoring Requirements
|
Monitoring Station |
Relevancy to Works Contract |
Coordinates |
Description
|
Parameters and Frequency |
|
|
Easting |
Northing |
||||
|
U1a’ (a) |
ND/2024/10 |
826821 |
838974 |
Upstream Station |
In-situ measurements • DO (mg/L) • DO Saturation (%) • Salinity • Temperature (℃) • pH • Turbidity (NTU)
Laboratory measurements • SS (mg/L)
3 days per week during the construction period of the relevant works contracts of the Project. |
|
U1b’ (a) |
ND/2024/10 |
827146 |
840550 |
Upstream Station (Alternative Monitoring location of U1b) |
|
|
G1a |
ND/2024/10 |
826686 |
839212 |
Gradient Station |
|
|
G1b |
ND/2024/10 |
826472 |
839908 |
Gradient Station |
|
|
G1c |
ND/2024/10 |
826339 |
840303 |
Gradient Station |
|
|
G1d |
ND/2024/10 |
826316 |
840657 |
Gradient Station |
|
|
D1’ (a) |
ND/2024/10 |
825363 |
841421 |
Impact Station |
|
|
D1’T (b) |
ND/2024/10 |
825536 |
840985 |
Impact Station |
|
|
U2a |
ND/2024/09 |
826181 |
838334 |
Upstream Station |
|
|
U2b’ (a) |
ND/2024/09 |
825517 |
838767 |
Upstream Station (Alternative Monitoring location of U2b) |
|
|
G2 |
ND/2024/09 |
825588 |
839518 |
Gradient Station |
|
|
D2a |
ND/2024/09 |
825200 |
839396 |
Impact Station |
|
|
D2b’ (a) |
ND/2024/09 |
824726 |
840168 |
Impact Station (Alternative Monitoring location of D2b) |
|
|
D2c |
ND/2024/09 |
824846 |
840373 |
Impact Station |
|
|
D2d |
ND/2024/09 |
825239 |
839846 |
Impact Station |
|
|
D7 |
ND/2024/09 |
824254 |
838831 |
Impact Station |
|
|
D8 |
ND/2024/09 |
824188 |
839310 |
Impact Station |
|
Note(s):
(a) EPD approved the alternative stations (U1a’, U1b’, D1’ U2b’ and D2b’) on 18 March 2026.
(b) Adjustment of water quality monitoring stations D1’T has been adopted as a temporary replacement of the original stations D1’ due to influence of the ongoing river maintenance works in San Tin Eastern Main Drainage Channel (STEMDC) since 11 February 2026. As no river maintenance works were observed on 25 March 2026, water quality monitoring was resumed at station D1’ starting from 25 March 2026.
2.3.2 Results and Observations
During the reporting period, weather conditions were predominantly sunny and partly cloudy, providing generally favorable circumstances for conducting impact monitoring of water quality.
As confirmed by the Engineer’s Representative (ER) for Contract Nos. ND/2024/09 and ND/2024/10, no construction activities were undertaken during the period from 3 April 2026 to 7 April 2026, and no water quality monitoring was scheduled.
Results for water quality monitoring are summarised in Table 2.12 below. No major source of construction works was observed during the water quality monitoring in the reporting period.
The graphical plots of the trends of monitored parameters are in Annex E1.
Table 2.12 SUMMARY OF impact water quality MONITORING RESULTS IN THE REPORTING PERIOD
|
Monitoring Station |
Average |
Range |
||||
|
DO (mg/L) |
Turbidity (NTU) |
SS (mg/L) |
DO (mg/L) |
Turbidity (NTU) |
SS (mg/L) |
|
|
U1a/U1a’ |
5.5 |
11.8 |
6.6 |
1.1 - 8.8 |
0.8 - 194.5 |
1.1 - 41.5 |
|
U1b’ |
6.7 |
49.4 |
9.6 |
1.3 - 9.8 |
1.4 - 902.5 |
1.0 - 94.0 |
|
G1a |
5.8 |
13.0 |
7.7 |
1.5 - 9.1 |
0.7 - 305.0 |
1.0 - 62.0 |
|
G1b |
2.4 |
18.2 |
10.1 |
0.3 - 10.2 |
4.7 - 125.5 |
1.9 - 45.0 |
|
G1c |
3.5 |
21.3 |
8.2 |
1.2 - 9.0 |
2.3 - 71.4 |
1.1 - 45.5 |
|
G1d |
4.7 |
31.5 |
14.3 |
0.6 - 13.1 |
1.9 - 249.0 |
1.0 - 45.5 |
|
D1’ /D1’T |
3.7 |
32.3 |
20.9 |
1.3 - 8.5 |
6.4 - 86.2 |
3.4 - 79.0 |
|
U2a |
6.5 |
6.1 |
5.2 |
1.9 - 9.6 |
0.6 - 13.2 |
1.0 - 24.0 |
|
U2b’ |
2.1 |
4.5 |
7.3 |
0.7 - 9.6 |
0.9 - 12.6 |
1.5 - 47.0 |
|
G2 |
3.9 |
12.0 |
9.2 |
1.5 - 6.6 |
2.2 - 54.2 |
1.0 - 39.0 |
|
D2a |
3.1 |
11.2 |
6.4 |
1.4 - 6.1 |
0.7 - 40.2 |
1.0 - 17.5 |
|
D2b’ |
3.7 |
21.9 |
8.9 |
1.5 - 6.2 |
3.3 - 38.7 |
1.9 - 18.0 |
|
D2c |
2.3 |
16.7 |
10.4 |
1.3 - 6.8 |
6.1 - 40.7 |
1.3 - 62.0 |
|
D2d |
1.7 |
21.0 |
9.4 |
1.3 - 3.8 |
4.8 - 40.4 |
1.7 - 42.5 |
|
D7 |
1.7 |
4.3 |
3.2 |
0.7 - 4.1 |
1.7 - 8.8 |
1.0 - 26.5 |
|
D8 |
3.0 |
5.9 |
4.8 |
1.5 - 6.2 |
3.5 - 11.1 |
1.0 - 22.5 |
No Project‑related Action or Limit level exceedance was recorded in the reporting period. A total of two (2) Action Level and twelve (12) Limit Level exceedances were recorded for impact water quality monitoring, investigation was conducted, and all exceedances were confirmed to be not Project‑related. Therefore, no further action under the Event and Action Plan was required in accordance with the Event and Action Plan presented in Annex E2. Details of exceedances recorded in the reporting period were summarized in Table 2.13 below.
Table 2.13 Summary of EXCEEDANCES RECORDED FOR water QUALITY MONITORING in the reporting period
|
Month |
Monitoring Station |
Parameter |
Exceedance Level |
No. of exceedance(s) |
Date |
|
March 2026 |
D7 |
SS |
Limit Level |
1 |
16 Mar 2026 |
|
|
D8 |
SS |
Limit Level |
1 |
30 Mar 2026 |
|
April 2026 |
D8 |
SS |
Limit Level |
1 |
9 Apr 2026 |
|
|
D2c |
SS |
Limit Level |
1 |
24 Apr 2026 |
|
|
D7 |
SS |
Limit Level |
1 |
24 Apr 2026 |
|
|
D8 |
SS |
Limit Level |
1 |
29 Apr 2026 |
|
May 2026 |
D8 |
SS |
Limit Level |
1 |
11 May 2026 |
|
|
D7 |
SS |
Limit Level |
1 |
13 May 2026 |
|
|
D8 |
SS |
Limit Level |
1 |
13 May 2026 |
|
|
D2d |
SS |
Action Level |
1 |
18 May 2026 |
|
|
D7 |
SS |
Limit Level |
1 |
18 May 2026 |
|
|
D8 |
SS |
Limit Level |
1 |
18 May 2026 |
|
|
D2c |
SS |
Limit Level |
1 |
20 May 2026 |
|
|
D8 |
SS |
Action Level |
1 |
30 May 2026 |
2.4 Ecological Monitoring
2.4.1 Egretry Monitoring Requirements
According to Sections 10.13.1.6 – 10.13.1.8 of the EIA Report and Sections 9.3.3.1 – 9.3.3.5 of the EM&A Manual of the Project, two active egretries, including Mai Po Lung Village (MPLV) Egretry and Mai Po Village (MPV) Egretry, were observed within / adjacent to Project boundary, and buffer area(s) of 100m from the footprint of both egretries were proposed (Figure 2.4).
Considering the condition, location and extent of egretry could change periodically with or without additional human disturbance, pre-construction surveys are necessary to confirm the latest boundary of the egretries before commencement of the construction works, and the 100m buffer area should be verified according to the latest site observation on the egretries. The pre-construction surveys for egretries were conducted monthly between March and September 2025 during breeding season. Two ardeid species, Chinese Pond Heron (Ardeola bacchus) and Little Egret (Egretta garzetta) were recorded in both egretries. Peak counts of 76 nests at MPV and 111 nests at MPLV Egretries were recorded respectively, which are comparable to the findings in the approved EIA report (84 nests at MPV and 86 nests at MPLV). A total of eight major flight lines were identified at both egretries, where the flight path preference was similar to those recorded in the approved EIA report. The extent of both egretries recorded during the pre-construction egretry survey is provided in Figure 2.4.
During the construction phase, egretry monitoring survey would be conducted monthly for the MPV Egretry and MPLV Egretry during breeding season (between March and early September) by qualified ecologist with at least 5 years of relevant working experience. Upon the completion of the enhancement work at the “Open Space”, egretry monitoring survey shall be continued monthly for the first three breeding seasons. The monitoring requirements for the egretry monitoring during the construction phase and upon the completion of the enhancement work at the “Open Space” shall be the same.
The implementation of seasonal control within the 100m buffer area should be confirmed (i.e. construction activities shall be avoided during the ardeid breeding period) during monitoring and no direct impact to the egretries shall be induced by construction works (except for the small area of encroachment as stated in the EIA Report).
2.4.2 Egretry Monitoring Methodology
2.4.2.1 egretry count
The location of the egretries and the vantage points for the flight path surveys are presented in Figure 2.5. The egretry monitoring survey was undertaken on 13 March, 23 April and 22 May 2026 at MPLV and 19 March, 17 April and 18 May 2026 at MPV during the reporting period, respectively by qualified ecologist with at least 5 years of relevant working experience. The status of egretries and ardeid nesting activities were identified. Active nests, which was determined by the presence of incubating adults or chicks, was counted directly from vantage points along the edge of a colony with the use of binoculars or by the naked eye, depending on the proximity between the surveyor and the colony.
The species, abundance and number of nests were recorded, whilst the latest boundary of the egretries was updated during pre-construction survey, where appropriate. These data were compared with that recorded in the baseline.
The nest status (vacant or occupied), notable breeding behaviours (e.g. brooding, feeding of chicks), and presence of adult/juveniles were identified. In addition, the physical environment, including identification of trees that are supporting nests within or in close proximity to the egretries, were recorded as supplementary information during monitoring.
2.4.2.2 flight path
Flight path surveys for the breeding ardeids were undertaken at the proposed vantages points for egretries (i.e. VP1A and VP1B for MPV Egretry, and VP2A and VP2B for MPLV Egretry respectively) (see Figure 2.6) for two hours in the early morning, starting about 15-30 minutes before sunrise, which is the peak period of bird activity.
The flight path and flight height of ardeid individuals were followed by means of high-power binoculars to identify their landing locations, wherever possible. Where the ardeids fly out of sight prior to landing, the location at which they are lost from sight were recorded.
2.4.2.3 site condition
Any changes in site condition or disturbances detected or observed (e.g. tree-crown pruning works) within or in close proximity to the egretries, including both construction and non-construction related activities, during each monitoring were also recorded.
2.4.3 Results and Observations of Egretry Monitoring
At this stage, a specific triggering point for investigation of any significant decrease in breeding ardeid numbers has not yet been established. This is because the commencement programme and extent of construction works within and adjacent to the concerned egretries and their associated 100 m buffer areas have yet to be confirmed. Baseline information on ardeid breeding activity will continue to be collected through routine egretry monitoring in accordance with the EM&A Manual. Subject to confirmation of the construction schedule and availability of contract‑specific information, the need for and applicability of a triggering point, including its definition and investigation mechanism, will be reviewed and established if considered necessary at a later stage to ensure timely identification and assessment of any construction‑related impacts. The extent of the egretries recorded in the approved EIA (2012 -2021 and 2022) and during the 2025 pre-construction survey is presented in Figure 2.7 for comparison.
2.4.3.1 MPV egretry
In the MPV egretry, nesting and breeding activities of ardeids were recorded on Albizia lebbeck and Aleurites moluccana. Given the egretry is closely adjacent to the Castle Peak Road (San Tin Section), intensive human disturbance (e.g. traffic of large container trucks) were observed. No construction activities were observed at the egretry or within the 100m buffer area during the reporting period. Details of number of nests and abundance of adults and juveniles in this reporting period are presented in Table 2.14 while usage of flight paths and flight heights are provided in Table 2.15 and Table 2.16, respectively. The flight paths of the egretry are presented in Figure 2.6.
Table 2.14 number of nests and ardeids recorded at MPV Egretry
|
Month |
Species |
Number of Nests |
Number of Adults |
Number of Chicks/Juveniles |
|
March 2026 |
Little Egret |
18 |
40 |
0 |
|
|
Chinese Pond Heron (Ardeola bacchus) |
0 |
0 |
0 |
|
April 2026 |
Little Egret |
56 |
32 |
0 |
|
|
Chinese Pond Heron (Ardeola bacchus) |
1 |
5 |
0 |
|
May 2026 |
Little Egret |
57 |
37 |
31 |
|
|
Chinese Pond Heron (Ardeola bacchus) |
3 |
3 |
0 |
|
March 2026 - May 2026 |
Little Egret |
131 |
109 |
31 |
|
|
Chinese Pond Heron (Ardeola bacchus) |
4 |
8 |
0 |
Table 2.15 usage of flight paths recorded at MPV egretry
|
Month |
Flight Path |
Number of Usage |
Percentage |
|
March 2026 |
Flight Path 1 |
35 |
30.4% |
|
|
Flight Path 2 |
11 |
9.6% |
|
|
Flight Path 3 |
28 |
24.3% |
|
|
Flight Path 4 |
14 |
12.2% |
|
|
Flight Path 5 |
9 |
7.8% |
|
|
Flight Path 5a |
15 |
13.0% |
|
|
Flight Path 6 |
0 |
0.0% |
|
|
Flight Path 7 |
3 |
2.6% |
|
|
Total |
115 |
100.0% |
|
April 2026 |
Flight Path 1 |
8 |
13.3% |
|
|
Flight Path 2 |
5 |
8.3% |
|
|
Flight Path 3 |
22 |
36.7% |
|
|
Flight Path 4 |
12 |
20.0% |
|
|
Flight Path 5 |
4 |
6.7% |
|
|
Flight Path 5a |
0 |
0.0% |
|
|
Flight Path 6 |
3 |
5.0% |
|
|
Flight Path 7 |
6 |
10.0% |
|
|
Total |
60 |
100.0% |
|
May 2026 |
Flight Path 1 |
36 |
22.5% |
|
|
Flight Path 2 |
7 |
4.4% |
|
|
Flight Path 3 |
32 |
20.0% |
|
|
Flight Path 4 |
52 |
32.5% |
|
|
Flight Path 5 |
9 |
5.6% |
|
|
Flight Path 5a |
3 |
1.9% |
|
|
Flight Path 6 |
9 |
5.6% |
|
|
Flight Path 7 |
12 |
7.5% |
|
|
Total |
160 |
100.0% |
|
March 2026 – May 2026 |
Flight Path 1 |
79 |
23.60% |
|
|
Flight Path 2 |
23 |
6.90% |
|
|
Flight Path 3 |
82 |
24.50% |
|
|
Flight Path 4 |
78 |
23.30% |
|
|
Flight Path 5 |
22 |
6.60% |
|
|
Flight Path 5a |
18 |
5.40% |
|
|
Flight Path 6 |
12 |
3.60% |
|
|
Flight Path 7 |
21 |
6.30% |
|
|
Total |
335 |
100.0% |
Table 2.16 usage of flight paths and flight heights recorded at mpv egretry
|
Month |
Flight height(m) |
Flight Path 1 |
Flight Path 2 |
Flight Path 3 |
Flight Path 4 |
Flight Path 5 |
Flight Path 5a |
Flight Path 6 |
Flight Path 7 |
|
March 2026 |
0-10 |
30 |
10 |
28 |
10 |
5 |
15 |
0 |
0 |
|
|
11-20 |
5 |
1 |
0 |
4 |
4 |
0 |
0 |
3 |
|
|
21-30 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
|
Total |
35 |
11 |
28 |
14 |
9 |
15 |
0 |
3 |
|
April 2026 |
0-10 |
7 |
4 |
19 |
10 |
3 |
0 |
0 |
3 |
|
|
11-20 |
1 |
1 |
3 |
2 |
1 |
0 |
3 |
3 |
|
|
21-30 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
|
Total |
8 |
5 |
22 |
12 |
4 |
0 |
3 |
6 |
|
May 2026 |
0-10 |
14 |
3 |
25 |
37 |
7 |
3 |
5 |
12 |
|
|
11-20 |
22 |
4 |
7 |
15 |
2 |
0 |
4 |
0 |
|
|
21-30 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
|
Total |
36 |
7 |
32 |
52 |
9 |
3 |
9 |
12 |
|
|
Total (March 2026 – May 2026) |
79 |
23 |
82 |
78 |
22 |
18 |
12 |
21 |
2.4.3.2 MPLV egretry
In the MPLV egretry, nesting and breeding activities of ardeids were recorded on Ficus virens, Ficus benjamina, Ficus Microcarpa, Melaleuca cajuputi subsp. cumingiana, and Peltophorum pterocarpum. Given the egretry is closely adjacent to the Castle Peak Road (San Tin Section), intensive human disturbance (e.g. traffic of large container trucks) were observed. No construction activities were observed at the egretry or within the 100m buffer area during the reporting period. Details of number of nests and abundance of adults and juveniles in this reporting period are presented in Table 2.17 while usage of flight paths and flight heights are provided in Table 2.18 and Table 2.19, respectively.
A new flight path towards southeast of egretry was observed during the reporting period, the updated flight paths of the egretry are presented in Figure 2.6.
Table 2.17 number of nests and ardeids recorded at MPLV Egretry
|
Month |
Species |
Number of Nests |
Number of Adults |
Number of Chicks/Juveniles |
|
March 2026 |
Little Egret |
3 |
1 |
0 |
|
|
Chinese Pond Heron (Ardeola bacchus) |
0 |
0 |
0 |
|
April 2026 |
Little Egret |
8 |
8 |
0 |
|
|
Chinese Pond Heron (Ardeola bacchus) |
27 |
27 |
0 |
|
May 2026 |
Little Egret |
21 |
23 |
23 |
|
|
Chinese Pond Heron (Ardeola bacchus) |
54 |
36 |
47 |
|
March 2026 – May 2026 |
Little Egret |
32 |
32 |
23 |
|
|
Chinese Pond Heron (Ardeola bacchus) |
81 |
63 |
47 |
Table 2.18 usage of flight paths recorded at MPLV egretry
|
Month |
Flight Path |
Number of Usage |
Percentage |
|
March 2026 |
Flight Path 1 |
0 |
0.0% |
|
|
Flight Path 2 |
0 |
0.0% |
|
|
Flight Path 3 |
8 |
36.4% |
|
|
Flight Path 4 |
11 |
50.0% |
|
|
Flight Path 5 |
0 |
0.0% |
|
|
Flight Path 6 |
0 |
0.0% |
|
|
Flight Path 7 |
0 |
0.0% |
|
|
Flight Path 8 |
3 |
13.6% |
|
|
Flight Path 9 |
0 |
0.0% |
|
|
Total |
22 |
100.0% |
|
April 2026 |
Flight Path 1 |
30 |
33.3% |
|
|
Flight Path 2 |
10 |
11.1% |
|
|
Flight Path 3 |
18 |
20.0% |
|
|
Flight Path 4 |
7 |
7.8% |
|
|
Flight Path 5 |
0 |
0.0% |
|
|
Flight Path 6 |
0 |
0.0% |
|
|
Flight Path 7 |
6 |
6.7% |
|
|
Flight Path 8 |
11 |
12.2% |
|
|
Flight Path 9 |
8 |
8.9% |
|
|
Total |
90 |
100.0% |
|
May 2026 |
Flight Path 1 |
13 |
12.1% |
|
|
Flight Path 2 |
20 |
18.7% |
|
|
Flight Path 3 |
19 |
17.8% |
|
|
Flight Path 4 |
26 |
24.3% |
|
|
Flight Path 5 |
15 |
14.0% |
|
|
Flight Path 6 |
1 |
0.9% |
|
|
Flight Path 7 |
7 |
6.5% |
|
|
Flight Path 8 |
6 |
5.6% |
|
|
Flight Path 9 |
0 |
0.0% |
|
|
Total |
107 |
100.0% |
|
March 2026 – May 2026 |
Flight Path 1 |
43 |
19.60% |
|
|
Flight Path 2 |
30 |
13.70% |
|
|
Flight Path 3 |
45 |
20.50% |
|
|
Flight Path 4 |
44 |
20.10% |
|
|
Flight Path 5 |
15 |
6.80% |
|
|
Flight Path 6 |
1 |
0.50% |
|
|
Flight Path 7 |
13 |
5.90% |
|
|
Flight Path 8 |
20 |
9.10% |
|
|
Flight Path 9 |
8 |
3.70% |
|
|
Total |
219 |
100% |
Table 2.19 usage of flight paths and flight heights recorded at mpLv egretry
|
Month |
Flight height(m) |
Flight Path 1 |
Flight Path 2 |
Flight Path 3 |
Flight Path 4 |
Flight Path 5 |
Flight Path 6 |
Flight Path 7 |
Flight Path 8 |
Flight Path 9 |
|
March 2026 |
0-10 |
0 |
0 |
7 |
11 |
0 |
0 |
2 |
2 |
0 |
|
|
11-20 |
0 |
0 |
1 |
0 |
0 |
0 |
1 |
1 |
0 |
|
|
21-30 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
|
Total |
0 |
0 |
8 |
11 |
0 |
0 |
3 |
3 |
0 |
|
April 2026 |
0-10 |
28 |
8 |
16 |
4 |
0 |
0 |
6 |
7 |
5 |
|
|
11-20 |
2 |
2 |
2 |
3 |
0 |
0 |
0 |
4 |
3 |
|
|
21-30 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
|
Total |
30 |
10 |
18 |
7 |
0 |
0 |
6 |
11 |
8 |
|
May 2026 |
0-10 |
4 |
14 |
19 |
24 |
13 |
1 |
7 |
5 |
0 |
|
|
11-20 |
9 |
6 |
0 |
2 |
2 |
0 |
0 |
1 |
0 |
|
|
21-30 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
|
Total |
13 |
20 |
19 |
26 |
15 |
1 |
7 |
6 |
0 |
|
|
Total (March 2026 – May 2026) |
43 |
30 |
45 |
44 |
15 |
1 |
16 |
20 |
8 |
2.5 EM&A Site Inspection
Site inspections were carried out on a weekly basis with the Contractor and ER to monitor the implementation of proper environmental pollution control and mitigation measures for air quality, noise, water quality, waste management, landscape and visual impacts under the Project. In the reporting period, thirteen (13) site inspections were carried out for ND/2024/09, and thirteen (13) site inspections were carried out for ND/2024/10. Details of comments and recommendations were provided during site inspections shall be referred to corresponding EM&A monthly reports. Key observations during the site inspections are summarized in Table 2.14.
No site inspection was conducted by EPD in the reporting period.
Table 2.20 Key Observations Identified during the site inspection in this Reporting Month
|
Inspection Date |
Environmental Observations |
Follow-up Status |
|
ND/2024/09 |
||
|
2 March 2026 |
· No particular observation. |
· N/A |
|
9 March 2026 |
• No particular observation. · The contractor was reminded to improve site runoff control measures. |
· N/A |
|
16 March 2026 |
• No particular observation. · The contractor was reminded to provide regular watering. |
· N/A |
|
25 March 2026 |
• The Contractor was reminded to conduct regular check and maintenance for the wet seps on site. |
· Regular checks and maintenance of the wet seps on site have been conducted. |
|
1 April 2026 |
• No particular observation. · The contractor was reminded to improve site runoff control measures along cycle track |
· N/A |
|
8 April 2026 |
• No particular observation. · |
· N/A |
|
13 April 2026 |
• No particular observation. · |
· N/A |
|
24 April 2026 |
· The contractor was reminded to wash vehicle/ shoes before exit site. |
· Footwear cleaning Basin has been provided at the site exit. |
|
27 April 2026 |
· No particular observation. |
· N/A |
|
4 May 2026 |
· No particular observation. |
· N/A |
|
11 May 2026 |
· No particular observation. |
· N/A |
|
22 May 2026 |
• No particular observation. · The contractor was reminded to review the performance of the sump pit and provide maintenance as necessary |
· N/A |
|
29 May 2026 |
· No particular observation. |
· N/A |
|
ND/2024/10 |
||
|
3 March 2026 |
• No particular observation. |
• N/A |
|
10 March 2026 |
• Overflow of the first sedimentation tank was observed. The contractor was reminded to review the site drainage system to ensure the capacity is adequate for coming wet season. |
• Overflow of the first sedimentation tank was resolved. Due to the low water flow from upper tank to lower tank. One more pump was provided in the upper tank to pump the water to the lower tank. |
|
17 March 2026 |
• No particular observation. |
• N/A |
|
26 March 2026 |
• No particular observation. • The contractor was reminded to cover all idle stockpiles |
• N/A |
|
1 April 2026 |
• No particular observation. |
• N/A |
|
8 April 2026 |
• No particular observation. • The contractor was reminded to collect/ clear the waste regularly on site. |
• N/A |
|
15 April 2026 |
• No particular observation. The contractor was reminded to cover the idle stockpile properly when idle. |
• N/A |
|
23 April 2026 |
• The contractor was reminded to display the CNP at the proper location at the site boundary. |
The valid CNP was displayed at the site boundary. |
|
28 April 2026 |
• No particular observation. • The contractor was reminded to check and maintain the site tidiness regularly. |
• N/A |
|
6 May 2026 |
• No particular observation. • The contractor was reminded to clear the stagnant water properly after rain on site. |
• N/A |
|
12 May 2026 |
• No particular observation. |
· N/A |
|
21 May 2026 |
• No particular observation. The contractor was reminded to clear the soil and mud regularly at the vehicle washing point |
· N/A |
|
26 May 2026 |
• No particular observation. |
· N/A |
2.6 Waste Management
Waste generated from the Works Contracts of the Project include inert construction and demolition (C&D) materials and non-inert C&D wastes. Sorting of C&D materials was carried out on site. Sufficient numbers of receptacles were available for general refuse collection and sorting.
Reference has been made to the waste flow tables prepared by the Contractors. The quantities of different types of waste are summarised in Table 2.21. Details of cumulative waste management data are presented as a waste flow table in Annex F.
Table 2.21 Comparison of Estimated Amount of Waste Generated for Construction of the Project and Actual Amount Generated during the Reporting Period
|
Type of Waste |
Estimated Amount for the Project (m3) |
Actual Amount during Reporting Period (m3) |
|
Inert C&D materials (or public fills) to be disposed of |
5,522,800
|
7.73 |
|
Non-inert C&D materials (or C&D waste) to be disposed of |
7,800 |
944.49 |
Note:
(a) Assumed Inert C&D waste density = 1,300kg/m3
(b) Assumed Non-inert C&D waste density = 800 kg/m3
2.7 Implementation Status of Environmental Mitigation Measures
A summary of the Environmental Mitigation Implementation Schedule is presented in Annex G1 and the Environmental Mitigation implementation status in this reporting period is presented in Annex G2. The necessary mitigation measures were implemented properly for the Project.
2.8 Summary oF Complaints, Notification OF Summons AND Successful Prosecutions
There was
no notification of summons or prosecution recorded in the reporting period.
3. comments Conclusion and Recommendations
This EM&A Report presents the findings of the EM&A activities undertaken for the Project during the period of March 2026 – May 2026 in accordance with the EM&A Manual and the requirements of the EPs. The environmental monitoring (impact and baseline), site inspection, environmental complaint handling and EM&A reporting in works areas under Contract Nos. ND/2024/09 and ND/2024/10 were covered and carried out.
Air quality (1-hour RSP, 24-hour rolling average RSP and 24-hour rolling average FSP), noise and water quality monitoring were carried out in the reporting period.
No Project-related Action or Limit level exceedance was recorded in the reporting period. A total of six (6) Action Level and fifty-eight (58) Limit Level exceedances were recorded for impact air quality monitoring, investigation was conducted, and all exceedances were confirmed to be not Project‑related. Therefore, no further action under the Event and Action Plan was required.
The monitoring results for impact noise monitoring complied with the Action/ Limit levels in the reporting period.
No Project-related Action or Limit level exceedance was recorded in the reporting period. A total of two (2) Action Level and twelve (12) Limit Level exceedances were recorded for impact water quality monitoring, investigation was conducted, and all exceedances were confirmed to be not Project‑related. Therefore, no further action under the Event and Action Plan was required.
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.
Based on observation from the impact monitoring results and site inspections recorded, it was considered that mitigation measures were effective and efficient in controlling the potential impacts due to construction of the project during the reporting period.
There was no environmental complaint, notification of summons or prosecution recorded in the reporting period.
The ET will keep track on the construction works to confirm compliance with environmental requirements and the proper implementation of all necessary mitigation measures.