Contents

2.1.1    Monitoring Requirements and Equipment 9

2.1.2    Results and Observations  9

2.2.1    Monitoring Requirements and Equipment 11

2.2.2    Monitoring Schedule for the Reporting Month  12

2.2.3    Results and Observations  12

2.3.1    Monitoring Requirements and Equipment 13

2.3.2    Monitoring Schedule for the Reporting Month  16

2.3.3    Results and Observations  16

Annex A      PROJECT ORGANISATION

Annex B      Construction Programme

Annex C      Environmental Licenses and Permits of the Project

Annex D1    CALIBRATION CERTIFICATES (ONSITE SENSORS)

Annex D2    CALIBRATION CERTIFICATES (TRANSFER STANDARDS)

Annex D3    AIR QUALITY MONITORING RESULTS

Annex D4    WIND CONDITIONS

Annex D5    EVENT AND ACTION PLAN FOR AIR QUALITY MONITORING

Annex E1    Calibration Certificates (Sound Level Meters and Acoustic Calibrators)

Annex E2    Noise Monitoring Schedule during Reporting Period

Annex E3    Noise Monitoring Results

Annex E4    Event and Action Plan for Noise Monitoring

Annex F1     Calibration Certificates of Water Quality Monitoring Equipment

Annex F2     Water Quality Monitoring Schedule during Reporting Period

Annex F3     Water Quality Monitoring Results

Annex F4     Event and Action Plan for Water Quality Monitoring

Annex G      Waste Flow Table

Annex H      Environmental Mitigation Implementation Schedule

Annex I       Tentative Schedules of Environmental Monitoring for Future 3 Months

Annex J      Status of EP Submissions

 

 

 

 

Executive Summary

This is the Monthly Environmental Monitoring and Audit (EM&A) Report presenting the EM&A works during the period of February 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                                     4 sessions

•      ND/2024/10                                     4 sessions

Water Quality Monitoring

•      ND/2024/09                                     11 sessions

•      ND/2024/10                                     11 sessions

Environmental Site Inspection

•      ND/2024/09                                     4 sessions

•      ND/2024/10                                     4 sessions

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.

Breaches of Action and Limit Levels for Air Quality

No exceedance of Action and Limit Levels was recorded for air quality monitoring in the reporting period. 

Breaches of Action and Limit Levels for Noise

No exceedance of Action and Limit Levels was recorded for impact noise monitoring in the reporting period. 

Breaches of Action and Limit Levels for Water Quality

No Project-related Action nor Limit level exceedance was recorded in the reporting period. A total of one (1) Action Level and no 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.

Key Issues For The Next Three Months

Potential environmental impacts arising from the upcoming construction activities in the next three months are mainly associated with dust emission, noise from plant operation, handling and storage of C&D materials generated from construction activities, efficiency of wastewater and drainage management and tree protection.  The ET will keep track on the construction works to confirm compliance with environmental requirements and the proper implementation of all necessary mitigation measures. 

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

EP	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 Monthly EM&A Report for the Project which summarises the key findings of the EM&A programme during the reporting period of February 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
Environmental Team (ET) (ERM-Hong Kong, Limited)	ET Leader	Terence Fong	2271 3156
	ET Leader(a)	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)	Project Director	Kit Chan	9681 8144
	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

(a)   CEDD notified EPD on 6 February that Mr. Raymond Chow would replace Mr. Terence Fong as the ET Leader with effect from 1 March 2026.

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

Construction Works Undertaken	Key Issues	Key Mitigation Measures
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 •      Pilot-scale Trial for Arsenic soil treatment •      Set up for shredding facility	•      Dust emission •      Handling and storage of construction and demolition (C&D) materials •      Noise from use of Powered Mechanical Equipment (PME) •      Emission of dark smoke from PMEs •      Proper discharge of wastewater •      Prevention and proper discharge of surface runoff •      Tree protection	•      Good site practices •      Regular water spraying on stockpiles •      Provide tarpaulin sheets coverage on stockpiles and reuse of C&D materials as far as practicable •      Use of QPME and noise barrier/acoustic mat/enclosure •      Regular maintenance of PMEs •      Implementation of wastewater and drainage management •      Retain and protect all existing trees and vegetation within the study area which are not directly affected by the works
Contract No. ND/2024/10
•      Ground Investigation Work •      Construction for Box Culvert •      Tree Felling	•      Dust emission •      Handling and storage of C&D materials •      Noise from use of PME •      Emission of dark smoke from PMEs •      Proper discharge of wastewater •      Prevention and proper discharge of surface runoff •      Tree protection	•      Good site practices •      Regular water spraying on stockpiles •      Provide tarpaulin sheets coverage on stockpiles and reuse of C&D materials as far as practicable •      Use of Quality Powered Mechanical Equipment (QPME) and noise barrier/acoustic mat/enclosure •      Regular maintenance of PMEs •      Implementation of wastewater and drainage management •      Retain and protect all existing trees and vegetation within the study area which are not directly affected by the works

1.5     Summary of EM&A 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 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. 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.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

 

Taking into account the construction works, impact monitoring of air quality, noise, water quality and waste management were carried out in the reporting period.  The monitoring schedule of noise and water quality are provided in Annex E2 and Annex F2 respectively.

The EM&A programme also involved environmental site inspections and related auditing conducted by the ET for checking the implementation of the required environmental mitigation measures recommended in the approved EIA Report and relevant EP submissions.  The relevant EP submissions are listed in Annex J.

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 Annex C.  No non-compliance with environmental statutory requirements was recorded.

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.  Copies of the calibration certificates for the onsite air sensors at the monitoring stations and the transfer standards are presented in Annex D1 and Annex D2 respectively.

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

The monitoring data and the graphical presentation for 1-hour RSP, 24-hour rolling average RSP and 24-hour rolling average FSP concentrations are summarised 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 monitoring data and the graphical presentation are provided in Annex D3.  Wind data during the reporting period extracted from the Hong Kong Observatory (HKO)’s weather station at Wetland Park are presented in Annex D4. 

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	13.4	1.0 - 41.3	150	Not applicable
M04	24.5	3.6 - 45.3	150	Not applicable
M06	29.2	3.3 - 63.5	150	Not applicable
M09	28.4	5.4 - 63.5	150	Not applicable
M11	31.3	18.4 - 67.3	150	Not applicable
M13	30.1	2.7 - 73.2	150	Not applicable
M14	22.8	1.8 - 55.5	150	Not applicable
M15a	19.2	1.2 - 54.1	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	13.5	6.3 - 22.4	Not applicable	100
M04	24.7	11.6 - 36.3	Not applicable	100
M06	29.5	11.4 - 53.6	Not applicable	100
M09	28.7	12.7 - 44.8	Not applicable	100
M11	31.4	22.4 - 47.2	Not applicable	100
M13	30.4	12.2 - 52.5	Not applicable	100
M14	23.1	9.1 - 43.6	Not applicable	100
M15a	19.5	7.1 - 37.9	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	10.6	5.1 - 17.6	Not applicable	50
M04	19.0	8.9 - 31.8	Not applicable	50
M06	21.4	9.5 - 36.0	Not applicable	50
M09	23.7	10.9 - 41.1	Not applicable	50
M11	26.6	20.5 - 36.3	Not applicable	50
M13	24.9	10.5 - 44.4	Not applicable	50
M14	16.9	7.1 - 29.4	Not applicable	50
M15a	17.5	6.4 - 29.6	Not applicable	50

 

No exceedance of Action and Limit Levels was recorded for air quality monitoring in the reporting period.  No action was thus required in accordance with the Event and Action Plan presented in Annex D5.

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 2.6 below.

Table 2.6  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.

 

According to the EM&A Manual of the Project, baseline noise monitoring shall be carried out daily at all identified monitoring stations for at least two weeks prior to the commencement of construction works.

Noise monitoring was performed using sound level meter at the designated monitoring stations provided in Table 2.7 and Figure 2.2, in accordance with the requirements stipulated in the EM&A Manual.  Acoustic calibrator was deployed to check the sound level meters at a known sound pressure level.  Details of the deployed equipment are provided in Table 2.7.  Copies of the calibration certificates for the equipment are presented in Annex E1. 

Table 2.7  impact Noise Monitoring Details

Monitoring Station	Relevancy to Works Contract	Location	Parameter and Frequency	Monitoring Dates	Equipment	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	3, 10, 21 and 24 February 2026	Sound Level Meter: Rion NL-52 (S/N: 00542913)   Acoustic Calibrator: Larson Davis CAL200 (S/N: 11333)	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  Monitoring Schedule for the Reporting Month

The schedule for impact noise monitoring during the reporting period is provided in Annex E2.

2.2.3  Results and Observations

Results for noise impact monitoring are summarised in Table 2.8.  Major noise sources during the noise monitoring included noise from use of Powered Mechanical Equipment (PME), tree felling, demolition and site formation works. The monitoring data and the graphical presentation are provided in Annex E3. 

Table 2.8  Summary of Construction Noise Monitoring Results in the Reporting Period

Monitoring Station	Average, dB(A), Leq (30 min) (b)	Range, dB(A), Leq (30 min)	Limit Level, dB(A), Leq (30 min)
CM1 (a)	69.4	68.4 - 70.0	75
CM3 (a)	51.9	50.3 - 53.3	75
CM4	45.4	41.9 - 47.3	75
CM9 (a)	63.4	62.0 - 65.0	75
CM10 (a)	57.7	55.9 - 59.5	75
CM11 (a)	53.8	51.2 - 57.0	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 E4.

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 2.9.

Table 2.9 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 2.10.

 

Table 2.10     Locations of Impact Water Quality Monitoring Stations and Monitoring Requirements

Monitoring Station	Relevancy to Works Contract	Coordinates		Description	Parameters and Frequency	Monitoring Dates
		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.	2, 4, 6, 9, 11, 13, 16, 20, 23, 25 and 27 February 2026
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
D1’T (c)	ND/2024/10	825536	840985	Impact Station
U2a	ND/2024/09	826181	838334	Upstream Station		2, 4, 6, 9, 11, 13, 16, 20, 23, 25 and 27 February 2026
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)   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

 

Monitoring at Station D1’T commenced on 11 February 2026 as a temporary arrangement due to the influence of the ongoing river maintenance works in San Tin Eastern Main Drainage Channel (STEMDC) on Station D1’. D1’T is located along the same drainage channel system and represents the same water body as D1’ and reflect comparable downstream water quality conditions, D1’T is considered an equivalent monitoring station for use during the maintenance period.

According to the latest information from DSD, the maintenance works are progressing downstream in three phases, tentatively scheduled for completion by end‑March 2026, end‑June 2026, and end‑September 2026, and will not extend upstream toward D1’T. As D1’T is situated adequate distance from the maintenance works area, monitoring results at this location remain unaffected.

During a site visit on 6 February 2026, the IEC raised no adverse comments regarding the temporary use of D1’T. The ER also raised no adverse comments on 10 February 2026.

The equipment used in the impact water quality monitoring work is summarised in Table 2.11 below.  Copies of the calibration certificates are attached in Annex F1.

Table 2.11     impact Water Quality Monitoring Equipment

Parameters (Unit)	Equipment
In-situ Measurement
Dissolved Oxygen (mg/L and % of saturation)	[YSI]/ [ProDSS] (S/N: 19C102067/19C000245)
Salinity (ppt)
Temperature (°C)
pH
Turbidity (NTU)
Current Velocity (m/s)	雲境天合 LS300-B
Laboratory Analysis
Suspended Solids (SS) (mg/L)	Sample Container: 1L Clear Plastic Bottle

 

2.3.2  Monitoring Schedule for the Reporting Month

The schedule for water quality monitoring during the reporting period is provided in Annex F2.

2.3.3  Results and Observations

A total of twenty-two (22) monitoring events for impact water quality monitoring were conducted at all designated monitoring stations in the reporting period.  Impact water quality monitoring results and graphical presentations are provided in Annex F3. 

No Project-related Action or Limit level exceedance was recorded in the reporting period. A total of one (1) Action Level and no Limit Level exceedances were recorded for impact water quality monitoring, investigation was conducted, and all exceedances were confirmed to be not Project‑related and summarised in Table 2.12 below. Therefore, no further action was required in accordance with the Event and Action Plan presented in Annex F4.

 

Table 2.12    Details of Exceedances Recorded for Water Quality Monitoring

Date	Monitoring Station	Parameter	Exceedance Level	Remarks
11 Feb 2026	D2d	SS	Action Level	The exceedances were unlikely caused by the construction of the Project as no construction activities that cause potential water quality impact were carried out near monitoring stations.

 

2.4   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, four (4) site inspections were carried out on 2, 9, 16 and 24 February 2026 for ND/2024/09, and four (4) site inspections were carried out on 3, 10, 16 and 26 February 2026 for ND/2024/10.

No site inspection was conducted by EPD in the reporting period.

Key observations during the site inspections are summarized in Table 2.13.

Table 2.13     Key Observations Identified during the site inspection in this Reporting Month

Inspection Date	Environmental Observations	Follow-up Status
ND/2024/09
2 February 2026	•      No particular observation.	·        N/A
9 February 2026	•      No particular observation.	·        N/A
16 February 2026	•      No particular observation.	·        N/A
24 February 2026	•      The Contractor was reminded to display the EP at the site entrance. •      The Contractor was reminded to provide drip trays for chemical containers. •      The Contractor was reminded to provide sufficient watering regularly.	·        EP had been displaced at the site entrance. ·        Drip tray had been provided for the checmial containers.
ND/2024/10
3 February 2026	•      No particular observation.	•      N/A
10 February 2026	•      No particular observation.	·        N/A
16 February 2026	•      No particular observation.	·        N/A
26 February 2026	•      The contractor was reminded to carry out wheel washing for the trucks before leave the site. •      The contractor was reminded to conduct water spraying as necessary during dry season.	·        Wheel washing had been carried out for the trucks before leaving the site.

2.5     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 2.14.  Details of cumulative waste management data are presented as a waste flow table in Annex G.

Table 2.14    Quantities of Waste Generated in Reporting Period

Month	Contract No.	Inert C&D Materials (a) (b) (m3)	Imported Fill (c) (m3)	Inert Construction Waste Reused (d) (m3)	Non-inert Construction Waste (e) (tonnes)	Recyclable Materials (f) (tonnes)	Chemical Waste (tonnes)
February 2026	ND/2024/09	26.38	6576.91	0.00	314.17	0.000	0.00
	ND/2024/10	0.00	0.00	0.00	42.16	0.000	0.00
	Sub-total	26.38	6576.91	0.00	356.33	0.000	0.00

Note:

(a)   Inert construction wastes include hard rock and large broken concrete, and materials disposed as public fill. 

(b)   The conversion factor for inert C&D Materials is 2.4 tonnes/m³.

(c)   Imported materials from any source outside of the Project.

(d)   Reuse of inert construction waste generated under the Project.

(e)   Non-inert construction wastes include general refuse disposed at landfill.

(f)    Recyclable materials include metals, paper, cardboard, plastics and others.

 

 

2.6   Implementation Status of Environmental Mitigation Measures

A summary of the Environmental Mitigation Implementation Schedule is presented in Annex H.  The necessary mitigation measures were implemented properly for the Project.

2.7   Summary oF Complaints, Notification OF Summons AND Successful Prosecutions

There was no notification of summons or prosecution recorded in the reporting period.

3.         Future Key Issues

3.1     Construction Programme for the coming Three Months

Works to be undertaken in the next three months are summarised in Table 3.1 below, together with key issues and the key mitigation measures.

Table 3.1     Major Construction Works in the Next Three Months

Construction Works to be Undertaken	Key Issues	Key Mitigation Measures
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 •      Arsenic soil treatment •      Ground Investigation (soil sampling) for contaminated soil treatment •      Operation of shredding facility •      excavation for drainage works •      CLP / gas main utilities laying at cycle track (Western side) •      Haul road (East & West) construction •      GI works	•      Dust emission •      Handling and storage of C&D materials •      Handling contaminated soil •      Noise from use of PME •      Emission of dark smoke from PMEs •      Proper discharge of wastewater •      Prevention and proper discharge of surface runoff •      Tree protection	•      Good site practices •      Regular water spraying on stockpiles •      Provide tarpaulin sheets coverage on stockpiles and reuse of C&D materials as far as practicable •      Use of QPME and noise barrier/acoustic mat/enclosure •      Regular maintenance of PMEs •      Implementation of wastewater and drainage management •      Retain and protect all existing trees and vegetation within the study area which are not directly affected by the works •      Carry out land remediation in accordance with the approved EIA Land Contamination Assessment. •      Properly house and cover excavated contaminated materials and exposed contaminated surfaces to prevent contaminated runoff. •      Prohibit open stockpiling of contaminated materials. •      Collect and manage all contaminated runoff and wastewater generated from decontamination works. •      Divert contaminated wastewater to suitable wastewater treatment facilities (WTF) as required. •      Equip WTF with appropriate treatment processes (e.g. oil interceptor, activated carbon) to reduce pollutants to acceptable levels and remove prohibited substances (e.g. TPH) to undetectable levels. •      Ensure all treated effluent complies with TM‑DSS requirements. •      Discharge treated effluent to foul sewers or tanker off-site for proper disposal.
Contract No. ND/2024/10
•      Ground Investigation Work •      Construction for Box Culvert •      Construction of Sewerage Pipe •      Construction of containment wall	•      Dust emission •      Handling and storage of C&D materials •      Noise from use of PME •      Emission of dark smoke from PMEs •      Proper discharge of wastewater •      Prevention and proper discharge of surface runoff •      Tree protection	•      Good site practices •      Regular water spraying on stockpiles •      Provide tarpaulin sheets coverage on stockpiles and reuse of C&D materials as far as practicable •      Use of QPME and noise barrier/acoustic mat/enclosure •      Regular maintenance of PMEs •      Implementation of wastewater and drainage management •      Retain and protect all existing trees and vegetation within the study area which are not directly affected by the works

 

The ET will keep track on the construction works to confirm compliance with environmental requirements and the proper implementation of all necessary mitigation measures.  The ET will also recommend to the Contractors about the environmental toolbox topics on the abovementioned key issues for the next reporting period.

3.2     Monitoring Schedule for the Future 3 Months

The tentative schedules for environmental monitoring in March, April and May 2026 are provided in Annex I.

 

 

4.         Conclusion and Recommendations

This EM&A Report presents the findings of the EM&A activities undertaken for the Project during the period of February 2026 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 (impact and baseline) and water quality monitoring were carried out in the reporting period.

The monitoring results for air quality monitoring complied with the Action/ Limit levels in the reporting period.

The monitoring results for impact noise monitoring complied with the Action/ Limit levels in the reporting period.

No Project-related Action nor Limit level exceedance was recorded in the reporting period. A total of one (1) Action Level and no 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.

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.