Introduction
1.
This is the 18th Monthly Environmental Monitoring and Audit (EM&A) Report
prepared by Cinotech Consultants Ltd. under “Contract
No. HATS 01/2025 Environment Team for Hung Shui Kiu Effluent Polishing Plant –
Phase 1” (hereinafter called “the Project”. This report documents the findings
of EM&A Works conducted in February
2026 in accordance with the requirement specified in the Environmental Monitoring and Audit
(EM&A) Manual.
Environmental
Monitoring Works and Audit
2.
Environmental monitoring for
the Project had been performed in accordance with the EM&A Manual, and the monitoring results were checked and reviewed. Site
Inspections/Audits shall be conducted once per week,
the weekly site inspection was conducted on 06, 13
and 27 February 2026 in
the reporting month. IEC joint site inspection was conducted on 26
February 2026. The implementation of
the environmental mitigation measures, Event Action Plans and environmental
complaint handling procedures, including the item responsible by the Environmental Team, were also checked.
3.
The
summary of exceedances in the reporting month for the Project is tabulated in Table I.
Table I Exceedance Record for the Project in the Reporting Month
|
Water Quality Monitoring Parameters
|
No. of Exceedance
|
No. of Exceedance due to construction activities
of this Project
|
|
Action Level
|
Limit Level
|
Action Level
|
Limit Level
|
|
DO in mg/L
|
0
|
0
|
0
|
0
|
|
Turbidity in NTU
|
0
|
0
|
0
|
0
|
|
SS in mg/L
|
0
|
0
|
0
|
0
|
|
Air Quality Monitoring
Parameters
|
Action Level
|
Limit Level
|
Action Level
|
Limit Level
|
|
1-hour TSP in ug/m3
|
0
|
0
|
0
|
0
|
Water Quality Monitoring
4.
The water quality monitoring
was conducted as scheduled in the reporting month. No
Action Level and Limit Level exceedances were recorded.
Details are provided in Appendix E.
Air Quality Monitoring
5.
The air quality monitoring was conducted as scheduled in the reporting
month. No Action Level and Limit Level exceedances were recorded. Details are provided in Appendix J.
Key Information in the Reporting Month
6.
Summary of Complaint, changes,
as well as notification of any summons and successful prosecution in the
reporting month, is tabulated in Table II.
Table II Summary Table for Key Information in the Reporting Month
|
Event
|
Event Details
|
Action Taken
|
Status
|
Remark
|
|
Number
|
Nature
|
|
Complaint received
|
0
|
---
|
N/A
|
N/A
|
---
|
|
Notifications of any summons & prosecutions
received
|
0
|
---
|
N/A
|
N/A
|
---
|
|
Public Engagement Activities
|
0
|
---
|
N/A
|
N/A
|
---
|
Reporting Change
7.
The Cinotech
Consultants Limited was commissioned by
Drainage Services Department (DSD) to undertake the Environmental Monitoring and Audit (EM&A)
works for the Project.The Contract No. HATS 07/2023 was superseded by Contract No. HATS 01/2025 from February 2026. EM&A Works for Hung Shui Kiu
Effluent Polishing Plant -Main Works shall continue and be reported under the
new Contract.
Future Key Issue
8.
Key
issues to be considered in the next three months included the following.
|
Contract No.
|
Contract Title
|
Major Site Activities
|
|
DC/2024/11
|
Hung Shui Kiu Effluent Polishing Plant
(HSKEPP) Phase 1 –
Civil Works
|
· Ground investigation work
· Mobilisation
work
· Erection of the site office
· H-pilling
|
|
DE/2024/09
|
Hung Shui Kiu Effluent Polishing Plant
(HSKEPP) Phase 1 –
E&M Works and Biological Treatment Building
|
· Ground investigation work at BTB
· Erection of the site office
|
9.
The future key environmental
issues in next three
months include:
· Wastewater and run-off generation
on-site;
· Water spraying for dust generating
activities and on haul road;
· Accumulation of general refuse and
construction waste on-site;
· Accumulation of stockpile of soil & weeds from haul road cleaning
activities or slope maintenance.
1.1
Background
1.1.1
The Hung Shui Kiu Effluent
Polishing Plant (HSKEPP) (the Project) which is located in the north-western
side of the Hung Shiu Kiu / Ha Tsuen New Development Area (HSK/HT NDA). It is
designed to provide reliable, adequate and quality sewage treatment and sewage
effluent disposal for the sewage collected from the new developments within the
HSK/HT NDA and other developments on the North West New Territories (NWNT).
1.1.2
An Environmental Impact
Assessment (EIA) study for the Project was conducted in accordance with EIA
Study Brief No. ESB- 312/2019. The EIA Report and Environmental Monitoring and
Audit (EM&A) Manual (Register No. AEIAR – 240/2022) were approved on 19
October 2022 under the Environmental Impact Assessment Ordinance (EIAO), with
an Environmental Permit (EP) granted on 19 October 2022 (EP No. EP-608/2022).
Variation of Environmental Permit (EP No. EP-608/2022A) was issued by EPD on 23
Apr 2025.
1.1.3
According to the approved
EM&A Manual of HSKEPP, the EM&A monitoring for the Project includes air
quality monitoring and water quality monitoring. Baseline dust and water
quality monitoring for HSKEPP was carried out within 24 June 2024 and 20 July
2024.
1.1.4
The
Contract No. HATS 07/2023 was superseded by Contract No. HATS 01/2025 from February 2026. EM&A Works for Hung Shui Kiu
Effluent Polishing Plant -Main Works shall continue and be reported under the
new Contract. Cinotech
Consultants Limited (Cinotech) was commissioned by DSD
as the Environmental Team (ET) to undertake environmental monitoring and
auditing services for the Project to ensure that the environmental performance
of the Works Contract complies with the requirements specified in the EP,
EM&A Proposal, Service Specifications and Supporting Documents of the
Project and other relevant statutory requirements.
1.1.5
The commencement date of the
construction works of Hung Shiu Kiu Effluent Polishing Plant (EP-608/2022
& EP-608/2022/A) was on 6 Sep 2024. A total of 2 environment team contracts for Hung Shiu Kiu Effluent Polishing
Plant have been conducted to undertake the EM&A works from the commencement
of the project. The inter-relationship between various contracts of the Hung
Shiu Kiu Effluent Polishing Plant project and submission of previous EM&A
reports are shown in Table 1.1.
Table 1.1 Summary Table for inter-relationship
between various contracts of the Hung Shui Kiu Effluent Polishing Plant project
and submission of previous EM&A reports
|
Contract No. of the Environment Team for Hung Shui Kiu Effluent
Polishing Plant
|
Environment Team
|
Submission of previous monthly EM&A report
|
|
HATS 07/2023
|
WSP (Asia) Limited (WSP)
|
Sep 2024 to Jan 2026
|
|
HATS 01/2025
|
Cinotech Consultants Ltd.
|
N/A
|
1.2
GENERAL
DESCRIPTION OF THE PROJECT
1.2.1
The key elements of this
Project comprise below:
·
Demolition
of existing structures and buildings within San Wai Preliminary Treatment Works
(SWPTW) for construction of HSKEPP facilities;
·
Construction
of a sewage treatment plant with a maximum capacity of Average Dry Weather Flow
(ADWF) up to 90,000 m3/day;
·
Construction
of sludge treatment facilities for treating sludge generated from Hung Shui Kiu
(HSK) Effluent Polishing Plant (EPP) and additional sludge generated from the
San Wai Sewage Treatment Works (STW) and other nearby STWs;
·
Construction
of facilities for receiving and co-digesting pre-treated food or organic
wastes;
·
Construction
of effluent discharge pipe connecting to the existing discharge tunnel of San
Wai STW; and
·
Associated
ancillary works.
1.2.2
The layout plan of the Project
is shown in Figure 2.1.
1.3
Purpose of the Report
1.3.1
This is the 18th Monthly EM&A Report prepared by the Environmental Team, Cinotech Consultants Ltd., for Contract No. HATS 01/2025
“Hung Shui Kiu Effluent Polishing Plant – Phase 1”, which summarises the impact
monitoring results and audit findings during the reporting period in February 2026, in according with the requirement specified in the EM&A Manual (Register
No. AEIAR-240/2022) for HSKEPP approved on 19 October 2022.
1.4
Project Organizations
1.4.1
Different Parties with
different levels of involvement in the project organization include:
·
Permit
Holder – Drainage Services
Department(DSD)
·
Project
Manager or Project Manager’s Delegates – AECOM (Asia) Consultants Limited
(AECOM)
·
Environmental
Team (ET) – Cinotech
Consultants Limited (Cinotech)
·
Independent
Environmental Checker (IEC) – AtkinsRéalis Asia Limited (AtkinsRéalis)
·
Contractor
(DC/2024/11)– China State - Best Build
Joint Venture (CSBBJV)
·
Contractor
(DE/2024/09) – REC Engineering - Chevalier
(Envirotech) Limited JV(REC-CEL JV)
1.4.2
The key contacts of the Project
are listed in table below.
Table 1‑2 Key Project Contacts
|
Party
|
Role
|
Position
|
Contact
Person
|
Phone No.
|
|
DSD
|
Project
Proponent
|
Engr/6 (Harbour
Area Treatment Scheme)
|
Mr. Gabriel Lau
|
3965 8629
|
|
AECOM
|
Project
Manager or Project Manager’s Delegates
|
Associate
|
Mr. Brian Wong
|
3856 5082
|
|
Cinotech
|
Environmental
Team (ET)
|
ET Leader
|
Ms. Betty Choi
|
2151 2072
|
|
AtkinsRéalis
|
Independent
Environmental Checker (IEC)
|
Independent Environmental Checker
|
Mr. W. K. Chiu
|
2972 1322
|
|
China State - Best Build Joint Venture
(CSBBJV)
|
Contractor
(DC/2024/11)
|
Environmental Officer
|
Ms. Tiffany Tsang
|
5117 9020
|
|
REC Engineering - Chevalier (Envirotech)
Limited JV
(REC-CEL JV)
|
Contractor
(DE/2024/09)
|
Environmental Officer
|
Mr. Stephen Tsang
|
9686 0787
|
1.4.3
The Organizational Structure
for Environmental Management is shown in Figure 1.1
1.5
Construction
Activities undertaken during the Reporting Month
1.5.1
The major site activities undertaken
in the reporting month included:
Table 1.3 Summary Table for Major Site Activities
in the Reporting Month
|
Contract No.
|
Contract Title
|
Major Site
Activities
|
|
DC/2024/11
|
Hung
Shui Kiu Effluent Polishing Plant (HSKEPP) Phase 1 – Civil Works
|
· Ground investigation work
· Mobilisation work
· Erection of the site office
· H-pilling
|
|
DE/2024/09
|
Hung
Shui Kiu Effluent Polishing Plant (HSKEPP) Phase 1 – E&M Works and Biological Treatment
Building
|
· Ground investigation work at BTB
· Erection of the site office
|
1.6
Status of Environmental Licenses and
Permits
1.6.1
All relevant permits/licences
obtained for this Project are summarised in Table 1.4 & Table 1.5.
Table
1.4 Summary of Environmental Licenses and Permits under Contract No
DC/2024/11
|
Licenses / Permits
|
Valid Period
|
Status
|
|
From
|
To
|
|
Environmental Permit
(EP)
|
|
EP-608/2022
|
19 Oct 2022
|
23 April 2025
|
Superseded
|
|
EP-608/2022/A
|
23 Apr 2025
|
Nil
|
Valid
|
|
Notification pursuant to
Air Pollution Control (Construction Dust) Regulation
|
|
EPD Ref No. 10018879
|
30 June 2025
|
Nil
|
Notification has been submitted to EPD on 30 June 2025
|
|
Billing Account for
Construction Waste Disposal
|
|
A/C No.7055204
|
22 July 2025
|
Nil
|
Valid
|
|
Registration of Chemical
Waste Producer
|
|
WPN-5213-511-C5120-01
|
13 Oct 2025
|
Nil
|
Valid
|
|
Wastewater Discharge
License
|
|
WT000480221-2026(Western Plant)
|
22 Jan 2026
|
31 Jan 2031
|
Valid
|
|
Construction Noise
Permit
|
|
PP-RN0032-25
(Percussive Piling)
|
4 Nov 2025
|
3 Feb 2026
|
Expired
|
|
PP-RN0003-26
(Percussive Piling)
|
4 Feb 2026
|
3 May 2026
|
Valid
|
|
GW- RN0121-26
|
2 Feb 2026
|
1 May 2026
|
Valid
|
|
|
|
|
|
Table 1.5 Summary of Environmental Licenses and Permits under Contract No
DE/2024/09
|
Licenses / Permits
|
Valid Period
|
Status
|
|
From
|
To
|
|
Environmental Permit
(EP)
|
|
EP-608/2022
|
19 Oct 2022
|
23 April 2025
|
Superseded
|
|
EP-608/2022/A
|
23 Apr 2025
|
Nil
|
Valid
|
|
Notification pursuant to
Air Pollution Control (Construction Dust) Regulation
|
|
N/A
|
N/A
|
N/A
|
Apply only if necessary
|
|
Billing Account for
Construction Waste Disposal
|
|
A/C No. 7055160
|
14 July 2025
|
N/A
|
Valid
|
|
Registration of Chemical
Waste Producer
|
|
N/A
|
N/A
|
N/A
|
Apply only if necessary
|
|
Wastewater Discharge
License
|
|
N/A
|
N/A
|
N/A
|
Apply only if necessary
|
|
Construction Noise
Permit
|
|
N/A
|
N/A
|
N/A
|
Apply only if necessary
|
|
|
|
|
|
1.7
Summary of EM&A
Requirements
1.7.1
The EM&A programme
specified in the EM&A Proposal requires water quality monitoring, air
quality monitoring, environmental site audit, etc. The
EM&A requirements for each parameter are described in the following
sections, including:
·
All monitoring parameters;
·
Action and Limit levels for all
environmental parameters;
·
Event and Action Plans;
·
Environmental mitigation
measures, as recommended in the EIA Reports, Environmental Review Reports and the
EM&A Proposal.
1.7.2
The advice on the
implementation status of environmental protection and pollution
control/mitigation measures is summarized in Section 6 of this
report.
1.7.3
This report presents the
monitoring results, observations, locations, equipment, period, methodology and
QA/QC procedures of the required water quality monitoring, air quality monitoring and audit works for the Project in February 2026.
2.1
Monitoring Requirement
2.1.1
In accordance with the EM&A Manual, impact water quality monitoring shall be carried out during
construction phase. The impact water quality monitoring
should be taken at all designated monitoring stations 3 days per week. The
intervals between two sampling surveys should not be less than 36 hours.
2.1.2
Duplicate in-situ measurements
(Dissolved oxygen (DO) concentration, turbidity and pH) and water samples
(suspended solids (SS) at specific depth were monitored in accordance with the
requirements in the EM&A Proposal.
2.1.3
Other relevant data was also
recorded, such as monitoring location / position, time, sampling depth, weather
conditions and any special phenomena or work underway nearby.
2.2
Monitoring Location
2.2.1
According to the Contract
Specification, water quality monitoring is required to be conducted at two
monitoring stations (one upstream control station and one downstream impact
station). The monitoring stations are summarized in Table 2.1 and shown in Figure 2-1.
Table 2.1 Location for Water Quality Monitoring Locations
|
Stations
|
Locations
|
Coordinates (m)
|
|
Easting (m)
|
Northing (m)
|
|
C1
|
Control
Station at upstream location of construction site
|
816278
|
834038
|
|
M1
|
Impact
station at downstream location of construction site
|
816571
|
833970
|
2.3
Monitoring Parameters and Frequency
2.3.1
Table 2.2 summarizes
the monitoring parameters of the impact water quality monitoring.
Table 2.2 Water Quality Monitoring Parameters and Frequency
|
Monitoring Stations
|
Parameters (unit)
|
Depth
|
Frequency
|
|
C1
M1
|
In-situ:
·
Temperature(°C)
·
pH (pH units)
·
Turbidity (NTU)
·
Water depth (cm)
·
Salinity (ppt)
·
Dissolved oxygen (DO) (mg/L and % of saturation)
Laboratory Testing:
·
Suspended solids (SS) (mg/L
|
Mid-depth at the River/Steam
|
3 days per week
|
2.3.2
Monitoring location/position,
time, water depth, sampling depth, weather conditions and any special phenomena
or work underway nearby were also recorded.
2.4
Monitoring Equipment
2.4.1
The equipment used in the water
quality monitoring programme are listed in Table 2.3. The copies of the calibration certificates of multi-parameter
water quality system are shown in Appendix B. The adopted equipment
fulfils the requirements specified in the EM&A Programme as detailed in the
following paragraphs.
Table 2.3 Water Quality Monitoring Equipment
|
Equipment
|
Model
|
Serial No.
|
Qty.
|
|
Multi-parameter Water Quality
System
|
YSI EXO 1
|
16J100880 (for Sonde)
17A105025 (for DO Sensor)
17A105120(for Temperature Sensor)
16J101124 (for Turbidity Sensor)
17B100258(for pH Sensor)
|
1
|
Dissolved Oxygen (DO) and Temperature
2.4.2
Portable and weatherproof
instrument for measuring dissolved oxygen and temperature with cable, sensor,
and DC power source was adopted. The equipment is capable of measuring:
·
DO level in the range of 0-20
mg/L and 0-200% saturation; and
·
temperature in the range of
0-45 degree Celsius.
Salinity
2.4.3
Portable salinometer capable of
measuring salinity in the range 0 – 40 parts per thousand (ppt) was adopted for
measuring salinity of the water at each designated monitoring station.
Turbidity
2.4.4
Portable and weatherproof
instrument with DC power source was adopted. Its photoelectric sensor is
capable of measuring turbidity between 0 – 1000 NTU.
pH
2.4.5
Instrument consists of a
potentiometer, a glass electrode, a reference electrode and a
temperature-compensating device was adopted. The instrument provides
measurement precision of 0.1 pH in a range of 0 to 14. Standard buffer
solutions of at least pH 7 and pH 10 were used for checking of the instrument
before and after use.
Water Depth Detector
2.4.6
Due to the shallow water (water
depth < 50cm) at the monitoring stations, stainless steel rulers were
proposed to determine the water depth.
Water Sampler
2.4.7
A small sampler with an
extendable rod was used for water sampling due to the shallow water (water
depth < 50cm) during dry season at the monitoring stations. In all cases,
the sampler had been submerged into mid-water column before collecting water sample.
Water Sampling for Laboratory Analysis
2.4.8
Water samples collected for
laboratory analysis were stored in high density polythene bottles sample
containers. All sampling bottles were labelled (waterproof) with the sample lot
number and sampling location reference number to avoid mishandling.
Sample Container and Storage
2.4.9
Water samples for SS and zinc
were stored in high density polythene bottles with no preservative added,
packed in ice or ice-cold insulator (cooled to 4°C without being frozen) and
delivered to the laboratory and analysed as soon as possible after collection.
Sufficient volume of samples was collected to achieve the detection limits
stated in Table 2.5.
2.4.10
Table 2.4
summarizes the type of sampling bottles and
preservation method for laboratory testing.
Table 2.4 Types of Sampling Bottles and Preservation Methods
|
Parameters to be Tested
|
Preservation
|
Type of Sample Container
|
|
Total
Suspended Solids (SS)
|
Refrigerate
|
1-liter
high density polythene bottle
|
Calibration of In-situ
Instruments
2.4.11
All in-situ monitoring
instruments checked, calibrated and certified by a laboratory accredited under
HOKLAS or any other international accreditation scheme before use and
subsequently re-calibrated at 3 monthly intervals throughout all stages of the
water quality monitoring. Responses of
sensors and electrodes checked with certified standard solutions before each
use. Wet bulb calibration for a DO meter
carried out before measurement at each monitoring location. They were certified
by High Precision Chemical Testing Ltd. (HOKLAS Registration No.296).
2.4.12
Sufficient stocks of spare
parts, i.e.: spare cables and sensors, have been maintained for replacements
when necessary. Backup monitoring equipment was also available so that
monitoring can proceed uninterrupted even when some equipment is under maintenance,
calibration, etc.
Monitoring Methodology
2.4.13
Multi-parameter meter (YSI
EXO-01) was used to measure Dissolved oxygen (DO) concentration, DO saturation
(DO %), pH, temperature and turbidity.
2.4.14
At each monitoring location,
two consecutive measurements were taken for water samples being collected on
site. The probes were retrieved out of the water after the first measurement
and then re-deployed for the second measurement. Where the difference in the
value between the first and second readings of each set was more than 25% of
the value of the first reading, the reading was discarded and further readings
were taken.
2.4.15
For SS, water samples at middle
layer were collected. Water samples of adequate volume specified by laboratory
were collected and stored in high density polythene bottles provided by
laboratory. Water samples were packed in ice and cooled to 4°C (without being
frozen), delivered to a HOKLAS accredited laboratory, High Precision Chemical
Testing Ltd. (HOKLAS Registration No.296), for the laboratory analysis of water
samples.
Laboratory Analytical Methods
2.4.16
The testing of SS was conducted by High Precision Chemical Testing Ltd. (HOKLAS
Registration No.296) and comprehensive quality assurance and control procedures
in place in order to ensure quality and consistency in results. The SS
determination work start within 24 hours after collection of the water samples.
The testing method and limit of reporting are provided
in Table 2.5.
Table 2.5 Methods
for Laboratory Analysis for Water Samples
|
Parameters
|
Proposed Method
|
Detection Limit
|
|
Suspended Solids (SS)
|
APHA
2540D (1)
|
1.0
mg/L(2)
|
Notes: (1) APHA American
Public Health Association Standard Methods for the Examination of Water and
Wastewater.
(2) If
the lab result of SS concentration at control station was less than 1.0 mg/L,
1.0 mg/L would be assumed as the SS concentration for calculating the action
and limit levels based on the control station as a conservative approach.
2.4.17
For the purpose of QA/QC, all
QA/QC results including blank, spike recovery, number of duplicate samples per
batch, etc. reported in accordance with the requirement of HOKLAS or
international accredited scheme. detection limits and accuracy submitted to EPD
for approval prior to the commencement of monitoring programme. EPD may also request the laboratory to carry
out analysis of known standards provided by EPD for quality assurance.
2.4.18
Additional duplicate samples
may require by EPD for inter laboratory calibration. Remaining samples after
analysis kept by the laboratory for 3 months in case repeat analysis is
required. If in-house or non-standard
methods are proposed, details of the method verification may also require
submitting to EPD. In any circumstance,
the sample testing has comprehensive quality assurance and quality control
programmes. The laboratory prepares to
demonstrate the programmes to EPD or his representatives when requested
2.5
Results and Observations
Results
2.5.1
The water quality monitoring
was conducted as scheduled in the reporting month; the detailed monitoring
schedule is shown in Appendix C. The in-situ
monitoring results and graphical presentation are shown in Appendix E. The laboratory testing reports of suspended solids are also given
in Appendix F.
2.5.2
Calculated Action and Limit
Levels for water quality is presented in Table 2.6
below.
Table 2.6 Calculated
Action and Limit Levels
|
Parameters
|
Action Level
|
Limit Level
|
|
DO in mg/L
|
≤ 3.8
|
≤ 3.7
|
|
Turbidity in NTU
|
≥ 17.2
or 120% of upstream control station(s) at the same tide of the
same day, whichever is higher
|
≥ 17.7
or 130% of upstream control station(s) at the same tide of the
same day, whichever is higher
|
|
SS in mg/L
|
≥ 25.0
or 120% of upstream control station(s) at the same tide of the
same day, whichever is higher
|
≥ 26.0
or 130% of upstream control station(s) at the same tide of the
same day, whichever is higher
|
Notes:
1. For
DO, non-compliance of the water quality limits occurs when monitoring result is
lower than the limits.
2. For
turbidity & SS , non-compliance of the water quality limits occurs when
monitoring result is higher than the limits.
3. Average
concentrations with duplicates have been adopted in the calculation.
4. The
calculated action/limit levels of DO are the same after correcting to the
nearest 0.1mg/L.
2.5.3
Table 2‑7
below shows the number of exceedances recorded in water
quality monitoring.
Table 2‑7 Number of Exceedances in Water Quality Monitoring
|
Water Quality Monitoring
Parameters
|
No. of Exceedance
|
No. of Exceedance related to
construction activities of this Project
|
|
Action Level
|
Limit Level
|
Action Level
|
Limit Level
|
|
DO (mg/L)
|
0
|
0
|
0
|
0
|
|
Turbidity (NTU)
|
0
|
0
|
0
|
0
|
|
SS (mg/L)
|
0
|
0
|
0
|
0
|
|
|
|
Total
|
0
|
0
|
0
|
0
|
Observations
2.5.4 All
water quality monitoring was conducted at the control monitoring station(C1)
& impact monitoring station (M1) as scheduled in the reporting month. The monitoring schedule is shown in Appendix C.
2.5.5 No Action/Limit Level exceedance
was recorded for all water quality monitoring in the reporting month.
2.5.6 The monitoring data with the
graphical plots are presented in Appendix E.
2.5.7 According to our field
observations, the major
influencing factors on the water quality monitoring results are summarised in Table 2.8.
Table 2.8 Summary of influencing factors on the water
quality monitoring
results
|
Monitoring
Stations
|
Influencing factors on the water quality
monitoring results
|
|
Control
Station(C1)
Impact
Station(M1)
|
·
General refuse accumulation surrounding
the steam
|
2.6
QA/QC Requirements
Decontamination Procedures
2.6.1
Water sampling equipment used
during the course of the monitoring programme was decontaminated by manual
washing and rinsing with clean river water or bottled water after each sampling
event.
Sampling Management and Supervision
2.6.2
Water samples were dispatched
to the testing laboratory for analysis as soon as possible after the sampling.
All samples were stored in a cool box and kept at less than 4ºC but without
frozen. All water samples were handled under chain of custody protocols and
relinquished to the laboratory representatives at locations specified by the
laboratory.
2.6.3
QA/QC reports by the
HOKLAS-accredited laboratory, High Precision Chemical Testing Ltd. (HOKLAS
Registration No.296), are attached with the laboratory testing report in Appendix
F.
3.1
Monitoring Requirement
3.1.1
According to the approved EM&A Manual for HSKEPP of the Project,
1-hour Total Suspended Particulates (TSP) monitoring was conducted to monitor
the air quality for this Project. The sampling frequency of 1-hour TSP monitoring, at
least three times in every six days shall be undertaken when the highest dust
impact occurs. Appendix A shows the established Action/Limit Levels for
the environmental monitoring works.
3.2
Monitoring Locations
3.2.1
Three (3)
designated monitoring stations were selected for air quality monitoring
programme. Table
3.1 describes the air quality monitoring
locations, which are also depicted in Figure 2.
Table 3.1
Air Quality Monitoring Locations
|
Monitoring Stations
|
Location
|
Location of Measurement
|
|
AM1
|
Tseung Kong Wai
|
Ground Level
|
|
AM2
|
Farm House
|
Ground Level
|
|
AM3(1)
|
Planned Port Back-up, Storage and
Workshop
|
N/A
|
Remark: (1) According to the previous ET’s monitoring team,
AM3 was blocked on 1 November 2024 for construction works. Based on the
communications among ET, DSD, IEC and EPD, all parties have no comment on the
suspension of air quality impact monitoring at AM3 until the construction works
at AM3 is completed. Details can be referred to Appendix L of the Monthly
EM&A Report (November 2024).
3.2.2 Air
Quality Impact Monitoring at AM3 was temporarily suspended starting from 7 Nov
2024 and would be resumed after the completion of construction of the planned
Port Back-up, Storage and Workshop use. Details of the suspension is presented in
Appendix L of the Monthly EM&A Report (November 2024).
3.3
Monitoring Parameters and
Frequency
3.3.1 Table 3.2 summarizes the monitoring parameters,
monitoring period and frequencies of impact air quality monitoring. The
monitoring schedule is shown in Appendix
C.
Table 3.2 Frequency and Parameters of Air Quality
Monitoring
|
Monitoring Stations
|
Parameter
|
Period
|
Frequency
|
|
AM1, AM2 & AM3(1)
|
1-hour TSP
|
0700 – 1900
|
3 times/day, once every 6 days
|
Remark: (1) According to the previous ET’s monitoring team,
AM3 was blocked on 1 November 2024 for construction works. Based on the
communications among ET, DSD, IEC and EPD, all parties have no comment on the
suspension of air quality impact monitoring at AM3 until the construction works
at AM3 is completed. Details can be referred to Appendix L of the Monthly
EM&A Report (November 2024).
3.4
Monitoring Equipment
3.4.1 The
1-hour sampling was determined by HVS to check the validity and accuracy of the
results measured by direct reading method.
3.4.2 Table 3.3
summarizes the equipment to be used for air quality monitoring. Copies of calibration certificates are
attached in Appendix B.
Table
3.3 Air Quality Monitoring
Equipment
|
Equipment
|
Model and Make
|
Serial No.
|
Quantity
|
|
1-hour TSP Dust
Meter
|
Sibata Model No.: LD-5R
|
4X7585 & 4X7586
|
2
|
|
HVS for
Calibration/Maintenance
|
GMW GS2310
|
10379
|
1
|
|
Calibrator
|
TISCH Model:
TE-5025A
|
3864
|
1
|
3.5
Monitoring Methodology
1-hour TSP Monitoring
Measuring Procedures
3.5.1 The
measuring procedures of the 1-hour dust meter are in accordance with the
Manufacturer’s Instruction Manual as follows:
(Sibata Model No.: LD-5R)
·
The 1-hour dust meter is placed
at least 1.3 meters above ground.
·
Set POWER to “ON” and make sure
that the battery level was not flash or in low level.
·
Allow the instrument to stand
for about 3 minutes and then the cap of the air sampling inlet has been
released.
·
Push the knob at MEASURE
position.
·
Set time/mode setting to [BG]
by pushing the time setting switch.
Then, start the background measurement by pushing the start/stop switch
once. It will take 6 sec. to complete the
background measurement.
·
Push the time setting switch to
change the time setting display to [MANUAL] at the bottom left of the liquid
crystal display. Finally, push the start/stop switch to stop the measuring
after 1 hour sampling.
·
Information such as sampling
date, time, count value and site condition were recorded during the monitoring
period.
Maintenance/Calibration
3.5.2 The
following maintenance/calibration is required for the 1-hour dust meter:
·
Check and calibrate the meter
by HVS to check the validity and accuracy of the results measured by direct
reading method at 2-month intervals throughout all stages of the air quality
monitoring.
3.5.3
Adoption of the wind data from the
existing automatic wind station, i.e. Lau Fau Shan, operated by Hong Kong
Observatory (HKO) rather than setting up wind data monitoring equipment is
based on the following justifications:
·
Lau Fan Shan automatic wind
station is located in the vicinity of the designated monitoring locations. This
Automatic wind station (22°28'08", 113°59'01") is located at the
north of the Project and the anemometer is set up at 31m above mean sea level.
It is clear of obstructions or turbulence caused by the buildings;
·
This automatic wind station was
considered as the closest wind station to the Project that could provide
representative wind data in Hung Shui Kiu areas; and
·
Wind data collected by HKO was
considered as a reliable data source for the wind data, it is widely used in
many EM&A Projects (e.g. Expansion of Hong Kong International Airport into
a Three-runway System, Siu Ho Wan Station and Siu Ho Wan Depot Replanning Works
– Advance Construction Works). The dataset is more accurate and reliable that
could be downloaded periodically with real-timed data logger.
3.5.4 The
data collected from Lau Fau Shan were used to check the wind speed and wind
direction. This weather information for the reporting month is summarized in Appendix
D.
3.6
Results and Observations
3.6.1 All
1-hour TSP monitoring was conducted at two monitoring stations (AM1 &AM2)
as scheduled in the reporting month. The monitoring
schedule is shown in Appendix C.
3.6.2 No Action/Limit Level exceedance
was recorded for all 1-hour TSP monitoring in the reporting month.
3.6.3 The monitoring data with the graphical plots are presented in Appendix J.
3.6.4 According to our field
observations, the major dust sources identified at the designated air quality monitoring stations are as follows:
Table 3.4 Major Dust Source
during Air Quality Monitoring
|
Monitoring
Stations
|
Major Dust Sources
|
|
AM1 - Tseung
Kong Wai
|
·
Road Traffic at Ha Tsuen Road & the surrounding
vintage road
·
Non-project related construction activities
and storage of dusty material from the CEDD project site managed by Gammon – Richwell Engineering Joint Venture
|
|
AM2 - Farm
House
|
·
Road Traffic at Ha Tsuen Road & the surrounding
vintage road
·
Non-project related construction activities
from the CEDD project site managed by Sang Hing – Kuly Joint Venture & Gammon – Richwell
Engineering Joint Venture
|
|
AM3 - Planned Port Back-up, Storage and
Workshop(1)
|
N/A
|
Remark: (1)
According to the previous ET’s monitoring team, AM3 was blocked on 1 November
2024 for construction works. Based on the communications among ET, DSD, IEC and
EPD, all parties have no comment on the suspension of air quality impact
monitoring at AM3 until the construction works at AM3 is completed. Details can
be referred to Appendix L of the Monthly EM&A Report (November 2024).
Comparison of EM&A
Result with EIA Prediction
3.6.5 The
air monitoring data were compared with the predictions in the EIA Report (as
approved in 2013), as summarised in Table
3.5.
Table 3.5 Comparison of 1-hr TSP Monitoring Data with
Predictions in EIA Report (AEIAR-240/2022)
|
Monitoring Stations
|
ASR ID
|
Predicted Maximum 1-hr
TSP Concentration in EIA Report (AEIAR-240/2022), μg/m3
|
Reporting Month
(February 2026),
μg/m3
|
|
AM1 - Wai Loi Tsuen
|
A601
|
154.0
|
15.2 – 70.3
|
|
AM2 - Fu Tei Au
|
A602
|
215.1
|
19.0 – 68.4
|
|
AM3 - Planned Port Back-up, Storage and
Workshop(1)
|
P1501
|
234.6
|
N/A
|
Remarks:(1) Air Quality Impact Monitoring at AM3 was
temporarily suspended starting from 7 Nov 2024 and
would be resumed after the completion of the
construction of the planned Port Back-up, Storage and Workshop use.
3.6.6 The
maximum 1-hour TSP concentration at AM1 & AM2 in the reporting month was
lower than the prediction in the EIA Report (AEIAR-240/2022).
4.1
Audit Requirement
4.1.1
According to the EM&A
Programme, no monitoring for waste management is required for the Project.
4.1.2
Site audit was carried out on a
weekly basis to monitor and audit the timely
implementation of waste management mitigation measures within the site
boundaries of this Project.
4.2
Status of Waste Management
4.2.1
The
amount of wastes generated by the major site activities of this Project during
the reporting month is shown in Appendix N. It should be noted that the waste
from this Project was handled together with the waste from other sites of
Contract No. DC/2024/11 & DE/2024/09 thus the amount of waste in Appendix N
is the total amount of waste for Contract No. DC/2024/11 & DE/2024/09.
5.1
Audit Requirement
5.1.1 Site inspection was undertaken by
the ET at least once every month during the construction period (i.e. 06 February 2026). Site inspection and
implementation Schedule of Environmental Mitigation Measures is provided in Appendix K. The observations and recommendations made during the site inspections
are presented in Table 6.1.
5.1.2
6.1
Site Audits
6.1.1
Site audits were carried out on
a weekly basis during the construction phase to monitor the timely implementation of proper environmental
management practices and mitigation measures on the Project site.
6.1.2
The weekly site inspection was conducted on 06, 13 and 27 February 2026 in
the reporting month. IEC joint site
inspection was conducted on 26 February 2026. No non-compliance was observed during the site audit.
6.1.3
According to the
information provided by the Contractor, no construction works were carried out
during the Lunar New Year holidays (from 16 to 20 February 2026). Therefore,
the weekly site inspection was suspended once.
6.2
Review of Environmental Monitoring Procedures
6.2.1
The monitoring work conducted
by the monitoring team was inspected regularly. The following procedures have
been recorded for the monitoring works:
Water Quality Monitoring
·
The Water Quality Monitoring was
conducted as scheduled in the reporting month.
·
The monitoring team recorded
all observations surrounding the monitoring stations C1 & M1, which might
affect the monitoring result.
·
The monitoring team confirmed
the pH meter, DO meter and turbidimeter were checked and calibrated.
·
The monitoring team recorded
the temperature, time, water depth and weather conditions during the sampling
processes.
Air Quality Monitoring
·
The Air Quality Monitoring was
conducted as scheduled in the reporting month.
·
The monitoring team recorded
all observations around the monitoring stations within and outside the
construction site.
·
The monitoring team recorded
the temperature, time and weather conditions on the monitoring days.
6.3
Implementation Status of
Environmental Mitigation Measures
6.3.1
According to the Environmental
Review Reports, Environmental Permits and the EM&A Proposal of the Project,
the mitigation measures detailed in the documents are recommended to be
implemented during the construction phase. An updated summary of the
Environmental Mitigation Implementation Schedule (EMIS) is provided in Appendix K.
6.3.2
The ET weekly site inspections were carried out
during the reporting month and the observations and recommendations as
well as follow-up actions are summarized in Table 6.1 & Table 6.2.
Table 6.1 Observations and Recommendations of Site Audit for DC/2024/11
|
Parameters
|
Date
|
Observations
and Recommendations
|
Follow-up
|
|
Water Quality
|
N/A
|
No environmental deficiency was identified in the
reporting period.
|
N/A
|
|
Air
Quality
|
27 Feb 2026
|
NRMM Label
should be provided to the PME at the Western Plant Site.
|
NRMM Label
was provided to the PME at the Western Plant Site.
|
|
Noise
|
N/A
|
No
environmental deficiency was identified in the reporting period.
|
N/A
|
|
Waste /
Chemical Management
|
N/A
|
No
environmental deficiency was identified in the reporting period. *
|
N/A
|
|
Landscape
and Visual
|
N/A
|
No
environmental deficiency was identified in the reporting period.
|
N/A
|
|
Permits/
Licenses/Others
|
N/A
|
No
environmental deficiency was identified in the reporting period.
|
N/A
|
Table 6.2 Observations
and Recommendations of Site Audit for DE/2024/09
|
Parameters
|
Date
|
Observations
and Recommendations
|
Follow-up
|
|
Water Quality
|
N/A
|
No environmental deficiency was identified in the
reporting period.
|
N/A
|
|
Air
Quality
|
N/A
|
No
environmental deficiency was identified in the reporting period.
|
N/A
|
|
Noise
|
N/A
|
No
environmental deficiency was identified in the reporting period.
|
N/A
|
|
Waste /
Chemical Management
|
N/A
|
No
environmental deficiency was identified in the reporting period.
|
N/A
|
|
Landscape
and Visual
|
N/A
|
No
environmental deficiency was identified in the reporting period.
|
N/A
|
|
Permits/
Licenses/Others
|
N/A
|
No
environmental deficiency was identified in the reporting period.
|
N/A
|
6.4
Implementation Status of Event
and Action Plans
6.4.1
The Event and Action Plan for air
quality & water
quality is presented in Appendix
L.
Water Quality monitoring
6.4.2
No Action Level and
Limit Level exceedances for water
quality monitoring were recorded in the reporting
month.
Air Quality monitoring
6.4.3
No Action Level and
Limit Level exceedances for air
quality monitoring were recorded in the reporting
month.
7
ENVIRONMENTAL NON-CONFORMANCE
7.1
Summary of Complaint, Warning,
Notification of any Summons and Successful Prosecution
7.1.1
No environmental complaint,
warning, notification of summons and successful prosecution for the Project was
received in the reporting month.
7.1.2
The summaries of environmental
complaint, warning, notification of summons and successful
prosecution for the Project is presented in Appendix M.
7.2
Summary of Exceedance
7.2.1
The summary of the exceedance
record in the reporting month is shown in Appendix H.
8.1
Major Site Activities and Key
Environmental Issues in the Coming Two Months
8.1.1
Tentative construction
programmes for the next three months are provided in Appendix O.
8.1.2
Major site
activities undertaken for the coming months are summarized in Table 8.1.
Table 8.1 Summary Table for Site Activities in the
Next Reporting Period
|
Contract No.
|
Contract Title
|
Site Activities
|
|
DC/2024/11
|
Hung Shui Kiu Effluent Polishing Plant
(HSKEPP) Phase 1 – Civil Works
|
· Ground investigation work
· Mobilisation work
· Erection of the site office
· H-pilling
|
|
DE/2024/09
|
Hung Shui Kiu Effluent Polishing Plant
(HSKEPP) Phase 1 – E&M
Works and Biological Treatment Building
|
· Ground investigation work at BTB
· Erection of the site office
|
8.2
Monitoring Schedule for the
Next Month
8.2.1
The tentative environmental
monitoring schedule for the next month is shown in Appendix C.
9.1
Conclusions
9.1.1
Environmental monitoring works
were performed in the reporting month and all monitoring results were checked
and reviewed.
Water Quality Monitoring
9.1.2
The water quality monitoring
was conducted as scheduled in the reporting month. No Action Level and Limit Level exceedances at M1 were
recorded.
Air
Quality Monitoring
9.1.3
The air quality monitoring was conducted as scheduled in the reporting
month. No Action Level and Limit Level exceedances at
AM1 & AM2 were recorded.
Site Audit
9.1.4
Three (3) ET joint weekly environmental site inspections were conducted in
the reporting month. One (1)
monthly site inspection carried out by IEC was
conducted in the reporting month.
Complaint and Prosecution
9.1.5
No environmental
complaint was received, and no environmental
prosecution were received in the reporting month.
9.2
Recommendations
9.2.1
According to the environmental
audit in the reporting month (February 2026) as
well as the previous months, the following recommendations were made which shall be implemented in
the next reporting month (March 2026).
Water Quality
·
The site practices outlined in ProPECC PN 2/24 “Construction Site Drainage” should be
followed as far as practicable to minimise surface
run-off and the chance of erosion.
·
All vehicles and plants should
be cleaned before they leave a construction site to minimise
the deposition of earth, mud and debris on roads.
Air
Quality
·
Establishment and use of
vehicle wheel and body washing facilities at the exit points of the site.
·
Open stockpiles shall be
avoided or covered. Where possible, prevent placing dusty material storage
piles near ASRs.
