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
2.7 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 Key Observations Identified during the site inspection in this Reporting Month
List of Figures
This is the Quarterly Environmental Monitoring and Audit (EM&A) Report presenting the EM&A works during the period of September - November 2025 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 9 sessions
• ND/2024/10 11 sessions
Water Quality Monitoring
• ND/2024/09 27 sessions
• ND/2024/10 30 sessions
Environmental Site Inspection
• ND/2024/09 9 sessions
• ND/2024/10 11 sessions
All the impact monitoring stations, parameters, frequencies, methodologies, specification of the equipment used and calibration requirements and the testing laboratory requirements were in accordance with the requirements of the EM&A manual.
All the monitoring equipment used for monitoring was calibrated and with valid calibration certificates. On-site audits for all monitoring and calibration were conducted on monthly basis to ensure the sampling locations, the methodologies and the equipment used were in accordance with the requirements of the EM&A manual.
Baseline monitoring for noise and water quality were conducted and the relevant Action and Limit level were established based on the baseline monitoring results and/or for comparison prior the impact monitoring commenced.
Adequate of sampling numbers for all the insitu monitoring and laboratory testing were obtained and recorded for analysis to justify the mitigation measures recommended in Final EIA report were effective and efficient.
During the reporting period, weather conditions were predominantly sunny and partly cloudy, providing generally favorable circumstances for conducting impact monitoring of air quality, noise, and water quality.
Due to the hoisting of signal No. 8 and above of super typhoon Ragasa from 23 to 24 September 2025, the continuous impact air quality monitoring from 23 September 2025 10:00 am to 25 September 2025 12:00 pm was suspended.
Due to the hoisting of signal No. 8 and above of super typhoon Ragasa from 23 to 24 September 2025, the scheduled water quality monitoring on 24 September 2025 was cancelled.
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.
Fifteen (15) Action Level exceedances were recorded for impact air quality monitoring in the reporting period. Relevant investigations and follow-up actions were conducted according to the EM&A programme. No project related exceedance was recorded.
No exceedance of Action and Limit Levels was recorded for impact noise monitoring in the reporting period.
Five (5) Limit Level and one (1) Action Level exceedances were recorded for impact water quality monitoring in the reporting period. Relevant investigations and follow-up actions were conducted according to the EM&A programme. No project related exceedance was recorded. Environmental Complaints, Non-compliance & Summons
There was no environmental complaint, notification of summons or prosecution recorded in the reporting period.
There was no reporting change in the reporting period.
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
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. |
||||||||||||||||||||||||||
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 September 2025 to November 2025.
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)(a) |
ET Leader |
Terence Fong |
2271 3156 |
|
ET Leader Representative (EP-640/2024) |
Harris Wong |
2271 3182 |
|
|
ET Leader Representative (EP-640/2024) |
Manson Yeung |
2271 3012 |
|
|
ET Leader Representative (EP-641/2024) |
Harmony Chuh |
2271 3273 |
|
|
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) |
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 |
|
Note(s):
(a) CEDD proposed to EPD to update the ET Leader Representative for EP-640/2024 and EP-641/2024 on 28 November 2025. Mr. Harris Wong and Mr Harmony Chuh would be replaced by Mr. Manson Yueng and Mr. Pako Yu, respectively.
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
|
September 2025 |
October 2025 |
November 2025 |
|
Contract No. ND/2024/09 |
||
|
• Topographic Survey • Ground Investigation Work • Wetland Enhancement Works • Soldier Pile Wall Construction • Tree Felling • Demolition Works • Site Formation Works |
• Topographic Survey • Ground Investigation Work • Wetland Enhancement Works • Soldier Pile Wall Construction • Tree Felling • Demolition Works • Site Formation Works |
• Topographic Survey • Ground Investigation Work • Wetland Enhancement Works • Tree Felling • Demolition Works • Site Formation Works • Trial pit excavation |
|
Contract No. ND/2024/10 |
||
|
• Ground Investigation Work • Preparation Work for Box Culvert • Tree Felling |
• Ground Investigation Work • Construction for Box Culvert • Tree Felling |
• Ground Investigation Work • Construction for Box Culvert • Tree Felling |
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 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 on-going at the original roosting sites until commencement of tree felling works, a standalone report for the survey will be prepared. |
|
Egretry Monitoring |
To be conducted monthly during breeding season (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 |
To be conducted in breeding season (March to July). The associated nest control measures to be conducted in non-breeding season (August to February) after pre-construction survey. |
|
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.
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.
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.
During the reporting period, weather conditions were predominantly sunny and partly cloudy, providing generally favorable circumstances for conducting impact monitoring of air quality. Due to the hoisting of signal No. 8 and above of super typhoon Ragasa from 23 to 24 September 2025, the continuous impact air quality monitoring from 23 September 2025 10:00 am to 25 September 2025 12:00 pm was suspended. Wind conditions during the reporting period extracted from the Hong Kong Observatory (HKO)’s weather station at Wetland Park are presented in Annex C1.
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 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 |
16.0 |
3.4 - 44.5 |
150 |
Not applicable |
|
M04 |
23.1 |
4.5 - 50.3 |
150 |
Not applicable |
|
M06 |
32.9 |
4.1 - 382.7 |
150 |
Not applicable |
|
M09 |
21.2 |
5.3 - 61.2 |
150 |
Not applicable |
|
M11 |
33.0 |
6.1 - 331.7 |
150 |
Not applicable |
|
M13 |
30.2 |
5.8 - 188.6 |
150 |
Not applicable |
|
M14 |
24.7 |
5.0 - 122.1 |
150 |
Not applicable |
|
M15a |
35.9 |
5.8 - 205.3 |
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 |
15.9 |
6.0 - 33.8 |
Not applicable |
100 |
|
M04 |
23.1 |
8.6 - 35.1 |
Not applicable |
100 |
|
M06 |
32.8 |
11.1 - 99.8 |
Not applicable |
100 |
|
M09 |
21.2 |
8.1 - 41.1 |
Not applicable |
100 |
|
M11 |
33.0 |
13.9 - 89.4 |
Not applicable |
100 |
|
M13 |
30.2 |
10.8 - 79.3 |
Not applicable |
100 |
|
M14 |
24.7 |
9.5 - 58.7 |
Not applicable |
100 |
|
M15a |
35.9 |
12.9 - 89.7 |
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 |
9.3 |
3.2 - 20.2 |
Not applicable |
50 |
|
M04 |
12.2 |
4.1 - 24.0 |
Not applicable |
50 |
|
M06 |
12.3 |
3.9 - 39.5 |
Not applicable |
50 |
|
M09 |
10.5 |
3.8 - 22.2 |
Not applicable |
50 |
|
M11 |
13.5 |
5.1 - 43.4 |
Not applicable |
50 |
|
M13 |
11.3 |
3.4 - 30.1 |
Not applicable |
50 |
|
M14 |
11.0 |
3.1 - 26.1 |
Not applicable |
50 |
|
M15a |
14.4 |
3.7 - 36.5 |
Not applicable |
50 |
Fifteen (15) Action Level exceedances were recorded for impact air quality monitoring in the reporting period. 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 |
|
September 2025 |
- |
- |
- |
- |
- |
|
October 2025 |
M11 |
1-hour RSP |
Action Level |
1 |
21 October 2025 18:00–18:59 |
|
November 2025 |
M06
|
1-hour RSP |
Action Level |
5 |
26 November 2025 19:00-19:59 21:00-21:59 22:00-22:59 23:00-23:59 27 November 2025 00:00-00:59 |
|
|
M11
|
1-hour RSP |
Action Level |
3 |
26 November 2025 21:00-21:59 22:00-22:59 23:00-23:59 |
|
|
M13
|
1-hour RSP |
Action Level |
3 |
26 November 2025 19:00-19:59 21:00-21:59 23:00-23:59 |
|
|
M15a
|
1-hour RSP |
Action Level |
3 |
26 November 2025 19:00-19:59 22:00-22:59 27 November 2025 00:00-00:59 |
No project related exceedance was recorded. No further action is therefore required to be undertaken in accordance with the Event and Action Plan presented in Annex C3.
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 |
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 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) |
69.5 |
68.3 - 70.6 |
75 |
|
CM3 (a) |
53.3 |
49.3 - 54.8 |
75 |
|
CM4 |
48.8 |
41.7 - 52.3 |
75 |
|
CM9 (a) |
64.8 |
62.9 - 66.8 |
75 |
|
CM10 (a) |
57.7 |
54.2 – 60.4 |
75 |
|
CM11 (a) |
52.9 |
49.7 - 54.9 |
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.
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.
Subjected to the safety concern arise from the unleashed dog for the access path to U1a, another location of water quality monitoring (U1a’) was selected downstream from U1a. U1a’ is located along the same water stream of U1a and same water body as the impact monitoring station, and outside the area of influence of the works under the Project. Water quality monitoring was carried out at U1a’ on 26 and 28 November 2025.
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 |
ND/2024/10 |
826721 |
838781 |
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. |
|
U1a’ (a) |
ND/2024/10 |
826821 |
838974 |
Upstream Station |
|
|
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’ (b) |
ND/2024/10 |
825363 |
841421 |
Impact Station |
|
|
U2a |
ND/2024/09 |
826181 |
838334 |
Upstream Station |
|
|
U2b’ (b) |
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’ (b) |
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) Alternative water quality monitoring station U1a’ is used as fall-back option in case sampling at original monitoring station of U1a as per EM&A Manual is not practical due to safety condition.
Alternative water quality monitoring station U1b’ is used as fall-back option in case sampling at original monitoring station of U1b as per EM&A Manual is not practical due to low flow condition.
(b) Alternative water quality monitoring stations D1’, D2b’ and U2b’ have been adopted as replacements of the original stations D1, D2b and U2b as per EM&A Manual due to access limitations.
(c) Impact water quality monitoring for ND/2024/10 on 24 September 2025 was cancelled due to the approach of super typhoon Ragasa.
During the reporting period, weather conditions were predominantly sunny and partly cloudy, providing generally favorable circumstances for conducting impact monitoring of water quality. Due to the hoisting of signal No. 8 and above of super typhoon Ragasa from 23 to 24 September 2025, the scheduled water quality monitoring on 24 September 2025 was cancelled.
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’ |
8.2 |
24.6 |
10.3 |
7.2 - 9.2 |
3.3 - 540.0 |
1.1 - 87.9 |
|
U1b’ |
7.5 |
134.6 |
41.2 |
5.7 - 9.6 |
5.4 - 1000.0 |
1.0 - 405.0 |
|
G1a |
8.3 |
6.1 |
6.2 |
7.4 - 10.1 |
2.9 - 11.7 |
1.2 - 38.8 |
|
G1b |
5.6 |
10.6 |
10.8 |
1.7 - 9.5 |
5.6 - 32.2 |
3.7 - 29.8 |
|
G1c |
5.7 |
9.6 |
10.7 |
4.0 - 7.2 |
3.7 - 34.2 |
2.9 - 59.3 |
|
G1d |
6.1 |
27.6 |
13.9 |
4.7 - 7.7 |
7.0 - 84.4 |
1.7 - 55.6 |
|
D1’ |
3.5 |
25.4 |
18.1 |
1.5 - 9.5 |
14.5 - 46.2 |
4.4 - 52.4 |
|
U2a |
7.7 |
6.5 |
4.1 |
6.6 - 8.9 |
1.8 - 12.9 |
1.3 - 11.9 |
|
U2b’ |
2.6 |
4.3 |
3.9 |
1.2 - 8.7 |
1.2 - 7.4 |
2.5 - 6.8 |
|
G2 |
5.9 |
22.1 |
5.2 |
2.3 - 8.5 |
1.9 - 393.0 |
1.2 - 15.7 |
|
D2a |
2.6 |
6.5 |
5.4 |
1.7 - 5.0 |
1.3 - 10.8 |
1.2 - 15.0 |
|
D2b’ |
5.6 |
18.4 |
10.5 |
3.0 - 8.6 |
6.8 - 87.3 |
5.9 - 29.5 |
|
D2c |
3.5 |
17.9 |
10.8 |
1.4 - 8.4 |
7.0 - 36.7 |
2.5 - 22.0 |
|
D2d |
5.5 |
15.6 |
8.4 |
1.3 - 9.7 |
5.4 - 46.8 |
4.6 - 14.9 |
|
D7 |
1.3 |
4.4 |
2.0 |
0.7 - 2.1 |
1.0 - 8.4 |
1.0 - 5.6 |
|
D8 |
4.1 |
9.4 |
3.6 |
1.7 - 8.8 |
5.5 - 24.4 |
1.3 - 9.5 |
Five (5) Limit Level and one (1) Action Level exceedances were recorded for impact water quality monitoring in the reporting period 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 |
|
September 2025 |
- |
- |
- |
- |
- |
|
October 2025 |
D8 |
SS |
Limit Level |
1 |
2 October 2025 |
|
|
D8 |
Turbidity |
Limit Level |
1 |
10 October 2025 |
|
November 2025 |
D8 |
Turbidity |
Limit Level |
1 |
1 November 2025 |
|
|
D7
|
SS |
Limit Level |
1 |
8 November 2025 |
|
|
D2b’
|
Turbidity |
Limit Level |
1 |
17 November 2025 |
|
|
D2d |
Turbidity |
Action Level |
1 |
17 November 2025 |
No project related exceedance was recorded. No further action is therefore required to be undertaken in accordance with the Event and Action Plan presented in Annex E2.
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, nine (9) site inspections were carried out for ND/2024/09, and eleven (11) 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.
EPD conducted site inspection on 04 November 2025 for discharge license application from ND/2024/09.
Table 2.14 Key Observations Identified during the site inspection in this Reporting Month
|
Inspection Date |
Environmental Observations |
Follow-up Status |
|
ND/2024/09 |
||
|
30 September 2025 |
· Nil. |
· Nil. |
|
8 October 2025 |
· Designated area should be assigned for waste storage at Portion 1B. · Relevant EP should be displayed at all site entrances/exits. |
· Designated area has been assigned for waste storage at Portion 1B. · Relevant EP have been displayed at all site entrances/exits. |
|
14 October 2025 |
· Designated area should be assigned for waste disposal/storage at Portion 1D. · Drip tray should be placed under the oil container. |
· Designated area has been assigned for waste disposal/storage at Portion 1D. · Drip tray has been placed underneath the oil container. |
|
22 October 2025 |
· Relevant EP should be displayed at the site entrance/exit at San Tin Soccer Pitch. |
· The Relevant EP has been displayed at the site entrance and exit at San Tin Soccer Pitch. |
|
28 October 2025 |
· The Contractor was reminded to provide wheel washing facility at the site entrance, and to provide bunds to gully to direct runoff to designated treatment facility. |
· Wheel washing facility has been provided at the site entrance. Bunds to gully have been provided to direct runoff to designated treatment facility. |
|
4 November 2025 |
· Provide mitigation to the discharge point to prevent untreated surface runoff flowing to discharge point directly |
· Mitigation measure has been provided to the discharge point to prevent untreated surface runoff flowing to discharge point directly. |
|
11 November 2025 |
· No particular observation.
|
· N/A |
|
19 November 2025 |
· A copy of EP shall be displayed at the site entrance |
· The Relevant EP has been displayed at the site entrance |
|
24 November 2025 |
· No particular observation.
|
· N/A |
|
ND/2024/10 |
||
|
18 September 2025 |
• Temporary mitigations to prevent surface water runoff should be provided (e.g. sandbags). • Generators should be provided with full enclosures. • Stockpile should be covered (e.g. by tarpaulin sheets). |
• Sandbags were provided to prevent surface water runoff. • Full enclosure will be provided as soon as possible. The enclosure with water-filled barrier was provided as temporary measure. • Water spraying has been provided for the stockpile. |
|
26 September 2025 |
• Accumulation of stagnant water was observed on site. The Contractor was reminded to clear the stagnant water. • Accumulation of excavated materials was observed on site. The Contractor was reminded to provide coverings for the excavated materials. • No non-road mobile machinery (NRMM) label was displayed for the excavator. The Contractor was reminded to display NRMM label for the excavator. |
· Stagnant water had been removed off site. · Materials had been removed off site. • NRMM label is displayed. |
|
2 October 2025 |
• No NRMM label was displayed for the excavator. The contractor was reminded to display NRMM label for the excavator. • Water spraying is not provided during breaking works. The contractor was reminded to provide water spraying for breaking works. • Noise acoustic wrapping is not provided for the breaker. The contractor was reminded to provide noise acoustic wrapping for the breaker to reduce noise emission from the breaking works. |
• NRMM label has been displayed for the excavator. • Water spraying has been provided during breaking works. • Noise acoustic wrapping has been provided for the breaker during breaking works. |
|
10 October 2025 |
• No particular observation. • The contractor was reminded that regular watering should be provided for exposed site surfaces and unpaved roads. |
• N/A |
|
16 October 2025 |
• Accumulation of stockpiles was observed on site. The Contractor was reminded to clear the stockpile regularly or provide coverings for the stockpile. |
• Stockpile was covered by tarpaulin sheet when idle. |
|
24 October 2025 |
• Breaking works without water spraying was observed on site. The Contractor was reminded to provide water spraying for breaking works. |
• Water spraying was applied during breaking works. |
|
28 October 2025 |
• Open stockpiles should be covered by tarpaulin sheet. |
• Stockpile was covered by tarpaulin sheet when idle. |
|
5 November 2025 |
• No particular observation. |
• N/A |
|
12 November 2025 |
• No particular observation. |
· N/A |
|
18 November 2025 |
• Drip tray shall be provided for chemical container. • Chemical waste container shall be locked & label properly. |
· Drip tray was provided for the chemical container · Chemical waste container was locked & label properly. |
|
26 November 2025 |
• No particular observation. • The contractor was reminded to collect & treat the wastewater generated from wheel washing prior discharge |
· N/A |
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 2.15. Details of cumulative waste management data are presented as a waste flow table in Annex F.
Table 2.15 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 |
5522800
|
197.56 |
|
Non-inert C&D materials (or C&D waste) to be disposed of |
7800 |
892.86 |
Note:
(a) Assumed Inert C&D waste density = 1,300kg/m3
(b) Assumed Non-inert C&D waste density = 800 kg/m3
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.
There was
no notification of summons or prosecution recorded in the reporting period.
This EM&A Report presents the findings of the EM&A activities undertaken for the Project during the period of September – November 2025 in accordance with the EM&A Manual and the requirements of the EPs. The environmental monitoring, 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.
Fifteen (15) Action Level exceedances were recorded for impact air quality monitoring in the reporting period. Relevant investigations and follow-up actions were conducted according to the EM&A programme. No project related exceedance was recorded.
The monitoring results for impact noise monitoring complied with the Action/ Limit levels in the reporting period.
Five (5) Limit Level and one (1) Action Level exceedances were recorded for impact water quality monitoring in the reporting period. Relevant investigations and follow-up actions were conducted according to the EM&A programme. No project related exceedance was recorded.
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.
|