Content
1.2 Construction
Works Programme
1.4 License,
Notification and Permits
1.5 Brief Summary
of EM&A Requirements
2.2 Air Quality Monitoring Parameter, Frequency and Duration
2.3 Monitoring Equipment and Methodology and QA/ QC Procedure
3.2 Noise Monitoring Parameter, Frequency and Duration
3.3 Monitoring Equipment, Methodology and QA / QC Procedure
3.4 Maintenance and Calibration
5. environmental site
inspection and audit
6. environmental
non-compliance
6.2 Summary of Environmental
Non-Compliance
6.3 Summary of Environmental Complaint
6.4 Summary of Environmental Summon
and Successful Prosecution
7.1 Construction Works and Potential Environmental Issues in the
next Reporting Period
8. ConclUsion,
Comments and recommendation
8.2 Comments and Recommendations
List of Tables
Table I Summary of EM&A Activities
in the Reporting Period
Table II Summary of Exceedance in the
Reporting Period
Table 1.1 Status of the TTA Sections
Table 1.2 Status of Environmental License,
Notification and Permits
Table 1.3 Summary of
Status of Submission under EP-602/2021
Table 2.1 Air Quality Monitoring Stations for
Construction Phase
Table 2.2 Impact Air Quality Monitoring
Parameter, Duration and Frequency
Table 2.3 Impact Air Quality Monitoring
Equipment
Table 2.4 Action and Limit Levels for 1-hour
TSP
Table 2.5 Summary of Impact 1-hour TSP
Monitoring Results
Table 2.6 Influencing Factors at / near Air
Quality Monitoring Stations
Table 3.1 Noise Monitoring Stations during
Construction Phase
Table 3.2 Construction Noise Monitoring
Parameter, Frequency and Duration
Table 3.3 Construction Noise Monitoring
Equipment
Table 3.4 Action and Limit Levels for
Construction Noise Monitoring
Table 3.5 Summary of Construction Noise
Monitoring Results
Table 3.6 Influencing Factors at Noise Monitoring Stations
Table 4.1 Summary of Waste Generated in the Reporting Period
Table 5.1 Summary of Site Inspections Observations and
Recommendations
List of Figure
Figure
1.1 Project Layout Plan
Figure
2.1 Air Quality Monitoring
Stations
Figure
3.1 Construction Noise
Monitoring Stations
List of Appendices
Appendix
A Master Construction Programme
for the Project
Appendix
B Project Organization Chart and
Key Personnel Contact
Appendix
C Event and Action Plans
Appendix
D Project Implementation Schedule
Appendix
E Air Quality and Noise Monitoring
Equipment Calibration Certification
Appendix
F Environmental Monitoring
Schedule
Appendix
G Air Quality Monitoring Results
and Graphical Presentation
Appendix
H Extract of Meteorological
Observations for Hong Kong (Kai Tak)
Appendix
I Noise Monitoring Results and
Graphical Presentation
Appendix
J Waste Generation in the
Reporting Month
Appendix
K Summary of Complaint,
Notification of Summons and Prosecution and Cumulative Complaint Log
EXECUTIVE SUMMARY
This is the 25th
Monthly Environment Monitoring and Audit (EM&A) Report for Relocation of
Diamon Hill Fresh Water and Salt Water Service Reservoirs to Caverns (the
Project). This report was prepared by Acuity Sustainability Consulting Limited
under Contract No. 21/WSD/21 (hereafter called “the Contract”). This report documents the findings of
EM&A works during the reporting period from 1 April to 30 April 2025.
Key Construction
Works in the Reporting Period
A summary of construction
activities undertaken during the reporting period is presented below:
Portions 1 & 3:
·
Within shaft, install and remove some strutting & Pipe pile
·
Tunnel excavation
·
PAB Excavation & Tie Back Installation
·
Pump house E&M provision
·
CLP cable draw pit and ducting construction
Portion
5:
·
Open trench main laying works
·
ELS for Receiving Pit
·
Reinstatement works
·
Backfilling works
·
Trial Pit Works
·
Pipe jacking work
Environmental Monitoring and
Audit Programme
The monthly EM&A programme
was undertaken by the Environmental Team in accordance with the EM&A
Manual. A summary of the monitoring and
audit activities during the reporting period is presented below:
Table I Summary
of EM&A Activities in the Reporting Period
|
EM&A
Activities |
Date |
|
1-hour TSP Monitoring |
5, 10, 16, 22, and 28 April
2025 |
|
Construction Noise Monitoring |
10, 16, 22, and 28 April 2025 |
|
Weekly Environmental Site
Inspection |
3, 11, 14 and 25 April 2025 |
Breaches of Action
and Limit Levels
A summary of the environmental
monitoring exceedance of the reporting period is tabulated in Table II.
Table
II Summary of Exceedance in the
Reporting Period
|
Environmental
Monitoring |
Parameter |
No.
of non-project related exceedances |
Total
no. of non-project related exceedances |
No.
of exceedances related
to the
project |
Total
no. of exceedances related to the project |
||
|
AL |
LL |
AL |
LL |
||||
|
Air Quality |
1-hour TSP |
0 |
0 |
0 |
0 |
0 |
0 |
|
Noise |
Leq(30-min) |
0 |
0 |
0 |
0 |
0 |
0 |
Note:
1. AL refers to Action Level and LL refers to
Limit Level.
Air Quality
No exceedance of Action Level or
Limit Level was recorded for 1-hour TSP monitoring during the reporting period.
Construction Noise
No Action Level exceedance was recorded
for construction noise monitoring during the reporting period.
No Limit Level exceedance was
recorded for construction noise monitoring during the reporting period.
Complaint Log
No environmental complaint was
received in the reporting period.
Notification of Summons and
Successful Prosecutions
No notification of summons or
successful prosecutions was received in the reporting period.
Reporting Change
There was no reporting change in
the reporting period.
Future Key Construction
Activities
Key construction activities to be
considered in the next two months included:
Portion
1 & 3:
·
PAB 355
pipe piling
·
PAB
Excavation & Tie Back Installation
·
Pump
house E&M provision
·
CLP cable
draw pit and ducting construction
·
Tunnel
excavation Q1 continue arch install, shotcrete, Jumbo drilling works and
grouting
·
Tunnel
excavation Q2, pipe pile cutting and kick off excavation
·
Site Set
up - Shotcrete supply, disposal arrangement,
Portion
5:
·
Open
trench main laying works
·
ELS for
Receiving Pit
·
Reinstatement
works
·
Backfilling
works
·
Trial Pit
Works
·
Pipe
jacking work
Potential environmental impacts
arising from the above construction activities are mainly associated with
construction dust, construction noise, water pollution control, waste
management and landscape and visual.
1.1.1
The relocated Diamond Hill Fresh Water and Salt
Water Service Reservoirs (DHSRs) will be constructed in a series of caverns
linked by access tunnels and adits. The relocated
Diamond Hill Fresh Water Service Reservoirs (DHFWSR) and Diamond Hill Salt
Water Service Reservoirs (DHSWSR) will be compartmented while the existing
Diamond Hill Pumping Station (DHPS) will be split into two (2) pump houses for
fresh and salt water supply when relocated.
1.1.2
Ancillary facilities to be constructed near the
tunnel portal may include transformer room, switch room, emergency generator
room, control room, ventilation building, and pumping station control room,
which will be constructed in an above-ground building outside the tunnel.
1.1.3
The scope of the Project comprises the following:
a)
Construction of
the relocated DHSRs and associated pumping stations and water main laying
works;
b)
Construction of
tunnels, adits, ventilation system and caverns for accommodating
the relocated DHSRs and the associated facilities;
c)
Terminating the
operation of the existing DHSRs and the associated facilities; and
d)
All other
associated works that are incidental to and necessary for the completion of the
Project.
1.1.4
The major construction activities of the Project
include earthworks, drilling and blasting, construction of concrete structures,
handling and transportation of excavated materials, water mains laying,
installation of electrical and mechanical (E&M) equipment and material
transportation. The operation of the
existing DHSRs and the associated facilities will be terminated after the
completion of the testing and commissioning of the relocated DHSRs. Under the Project, the existing DHSRs and
associated facilities will be retained after termination of the operation. The subsequent demolition works will be
carried out by other government departments/ project proponents.
1.1.5
The Project construction was commenced on 31 March
2023 and the completion date for the construction works would be on 12 April
2027.
1.1.6
The Project is a Designated Project under Item Q.2,
Part I of Schedule 2 of the Environmental Impact Assessment Ordinance,
"Underground Rock Caverns", which requires an environmental permit
from the Environmental Protection Department (EPD) for its construction and
operation.
1.1.7
Pursuant to the Environmental Impact Assessment
Ordinance (EIAO), the Director of EPD granted the Environmental Permits
(EP-602/2021) to the Water Supplies Department (WSD) for the Project.
1.1.8
Acuity Sustainability Consulting Limited (ASCL) is
commissioned by Chun Wo – Sinohydro Joint Venture to
undertake the role of Environmental Team under the Environmental Permit (EP)
EP-602/2021, and to carry out the EM&A programme in fulfilment of the
EM&A Manual, and other requirements stipulated in the associated EIA
Report.
1.1.9
This is the 25th Monthly EM&A Report summarizing the key
findings of the construction phase EM&A programme from 1 April to 30 April 2025 (the reporting period) and is submitted to fulfil the
requirements under Condition 3.4 of EP-602/2021 and Section 13.3 of the
EM&A Manual of the Project.
1.2.1
The construction works of the Project was commenced
on 31 March 2023. The construction works
programme, and the location of construction works of the Project are shown in Appendix A and Figure 1.1, respectively.
A summary of construction activities undertaken during the reporting
period is presented below:
Portions
1 & 3:
·
Within shaft, install and remove some strutting & Pipe pile
·
Tunnel excavation
·
PAB Excavation & Tie Back Installation
·
Pump house E&M provision
·
CLP cable draw pit and ducting construction
Portion
5:
·
Open trench main laying works
·
ELS for Receiving Pit
·
Reinstatement works
·
Backfilling works
·
Trial Pit Works
·
Pipe jacking work
1.2.2
Table 1.1 summarise the status of temporary traffic sections near the works
sites.
Table 1.1 Status of the Temporary Traffic
Arrangement (TTA) Sections
|
Name of TTA |
Status |
|
Section 1 – Lion Rock Road |
Implemented |
|
Section 1 - Chuk Yuen Road
(Westbound) near Tin Ma Court |
Implemented |
|
Section 1 - Chuk Yuen Road
(Eastbound) near Tin Wang Court |
Implemented |
|
Section 2 - Chuk Yuen Road
near Pang Ching Court |
Implemented |
|
Section 2 – Chuk Yuen Road
near Pang Ching Court (eastbound) |
Implemented |
|
Section 2 - Chuk Yuen Road
near Chuk Yuen South Estate (westbound) |
Implemented |
|
Section
2 - Chuk Yuen Road near Chuk Yuen Estate Bus Terminus (westbound) |
Implemented |
|
Section
2 - Chuk Yuen Road near Chuk Yuen Estate Bus Terminus (eastbound) |
Implemented |
|
Section
3 - Chuk Yuen Road near Bus Terminus (eastbound) |
Implemented |
|
Section
3 - Chuk Yuen Road near Market (westbound) |
Implemented |
|
Section
3 - Tsz Wan Shan Road stage 3 |
Implemented |
|
Section
3 - Lung Fung Street (Open Trech Section) |
Implemented |
|
Section
3 – Ming Fung Street |
Implemented |
|
Section
3 – Sheung Fung Street |
Implemented |
|
Section
3 – Shatin Pass Road |
To be
implemented |
1.3.1
Different parties with different levels of involvement
in the Project organization include:
· Project Proponent: Water Supplies Department (WSD)
· Supervisor/ Engineer’s Representative (ER): Binnies Hong Kong Limited
· Contractor: Chun Wo - Sinohydro Joint Venture
· Environmental Team (ET): Acuity Sustainability Consulting Limited
· Independent Environmental Checker (IEC): Umwelt Consulting Limited
1.3.2
The key personnel contact names and telephone number
are presented in Appendix B.
1.4.1
A summary of the relevant permit, licences, and/ or
notifications on environmental protection for this Project are presented in Table 1.2.
Table 1.2 Status of Environmental License, Notifications and Permits
|
Permit / License No. |
Valid Period |
Status |
|
|
From |
Expired On |
||
|
Environmental Permit |
|||
|
EP-602/2021 |
14/12/2021 |
- |
Valid |
|
Notification Pursuant to Section 3(1) of the Air
Pollution Control (Construction Dust) Regulation |
|||
|
Ref. No.: 487301 |
09/12/2022 |
- |
Valid |
|
Billing Account for Disposal of Construction Waste |
|||
|
7046085 |
04/01/2023 |
- |
Valid |
|
Registration of Chemical Waste Producer |
|||
|
WPN 5213-282-C4760-0 |
30/12/2022 |
- |
Valid |
|
Effluent Discharge License under Water Pollution Control Ordinance |
|||
|
WT00043965-2023 |
31/05/2023 |
31/05/2028 |
Valid |
|
WT10002621-2023 |
08/04/2024 |
30/04/2029 |
Valid |
|
Construction Noise
Permit |
|||
|
GW-RE0444-25 (Portion 1 & 3) |
22/04/2025 |
29/08/2025 |
Valid |
|
GW-RE0361-25 (Portion 5) |
01/04/2025 |
01/09/2025 |
Valid |
|
GW-RE0428-25 (Special Case) |
15/04/2025 |
15/08/2025 |
Valid |
|
|
|
|
|
1.4.2
The submission status of the EP and the
implementation status of the mitigation measures stated in the EP had been
reviewed, all submission were submitted/ deposited to the Director of Environmental
Protection (DEP) on schedule, no non-compliance of EP conditions was recorded
during the reporting period. The summary
of submission status under Environmental Permit EP-602/2021 are summarized in Table 1.3.
Table 1.3 Summary of Status of Submission under EP-602/2021
|
EP Condition |
Title of Submission |
Submission Status |
|
1.11 |
Commencement Date of
Construction |
Notified the DEP on 22 Feb 2023 |
|
2.9 |
Management Organization(s) |
Informed the DEP on 20 Feb 2023 |
|
2.10 |
Environmental Permit (EP)
Submission Schedule |
22 Feb 2022 (1st Submission) |
|
2.11 |
Construction Works
Schedule and Location Plan |
28 Feb 2023 (Deposited) |
|
2.12 |
Construction Noise
Management Plan (CNMP) |
·
28 Feb
2023 (1st submission) ·
The
EPD’s comments were issued on 8 Mar 2023 ·
The
revised CNMP was submitted to the EPD for comment on 31 Jul 2023. ·
The EPD
issued further comments on 16 Aug 2023. ·
The
CNMP was further revised, certified by the ET Leader, verified by the IEC,
and issued to the EPD on 22 Aug 2023. ·
The
revised CNMP was submitted to the EPD for comment on 15 Sept 2023. · The EPD had no further comment on 5 Oct 2023. |
|
2.13 |
Waste Management Plan
(WMP) |
·
28 Feb
2023 (1st submission) ·
The
EPD’s comments were issued on 3 Apr 2023. ·
The
revised WMP was submitted to the EPD for comment on 26 July 2023. ·
The WMP
was further updated and submitted to the EPD on 16 Aug 2023. · The EPD had no further comment on 19 Sep 2023. |
|
2.14 |
Landscape and Visual
Mitigation Plan (LVMP) |
·
28 Feb
2022 (1st Submission) ·
The
EPD’s comments were issued on 29 Mar 2023. ·
The
revised LVMP was certified by the ET Leader, verified by the IEC, and issued
to the EPD on 22 Aug 2023. ·
The EPD
issued further comments on 11 Sep 2023. ·
The
revised LVMP was certified by the ET Leader, verified by the IEC, and issued
to the EPD on 15 Jan 2024. ·
The EPD issued further comments on 31 Jan 2024. ·
The
revised LVMP was certified by the ET Leader, verified by the IEC, and issued
to the EPD on 19 Apr 2024 · The EPD had no further comment on 29 Apr 2024. |
|
3.3 |
Baseline Monitoring Report |
·
17 Mar
2023 (1st Submission) ·
27 Apr
2023 (2nd Submission) · 1 June 2023 (3rd
Submission) ·
13
July 2023 (Formal submission) ·
3
Aug 2023 (accepted by the EPD) |
|
3.4 |
Monthly EM&A Report (March 2025) |
8 April 2025 |
|
4.2 |
Dedicated Internet
Website |
2 May 2023 |
1.4.3
Following the
EPD’s comments on the Baseline Monitoring Report (Ref. No. BMR-3.1, dated 17
March 2023), updating of air quality and noise monitoring locations were
proposed, including cancellation of noise monitoring station at Tower 1, Meridian Hill (NM-1), resumption of air
quality and noise monitoring stations at Block 6, Tsui Chuk Garden (i.e. DM-4
and NM-4) and proposal of new noise monitoring locations at Wo Tin House, Shatin Pass Estate (NM-5) and Sheung Fung
Street Customs Staff Quarter (NM-6).
1.4.4
Additional
baseline monitoring for air quality monitoring station DM-4, and noise
monitoring stations NM-4, NM-5 and NM-6 was carried out between 2 May and 16
May 2023. The Baseline Monitoring Report
was updated with all baseline monitoring results included, certified by the ET
Leader, and verified by the IEC on 30 May 2023.
The updated Baseline Monitoring Report was submitted to the EPD on 1
June 2023. A minor comment was received
from the EPD on 26 June 2023. Following
the advice from the EPD, the Report was formally submitted to the EPD on 13
July 2023 after amendment. The Report
was accepted by the EPD on 3 August 2023.
Air Quality
1.5.1
In accordance with the EM&A Manual, the ET shall
carry out impact
monitoring during construction phase of the project. For
1-hour Total Suspended Particulates (TSP) monitoring, the sampling frequency of
at least three times every six days should be undertaken when the highest dust
impact occurs.
1.5.2
Action and Limit Levels for the 1-hour TSP
monitoring works are discussed in Section 2.4. Should non-compliance of the
criteria occur, action in accordance with the Event and Action Plan presented
in Appendix C shall be carried out.
1.5.3
The air
quality mitigation measures detailed in the EM&A Manual were recommended to
be implemented during the construction phase.
The implementation statuses of these measures are presented in Appendix D.
Noise Monitoring
1.5.4
Construction
noise monitoring should be carried out at the designated monitoring stations
directly affected by the construction works once every week after the
commencement of construction. During construction works, one set of Leq(30-min)
measurement at each station between 0700 and 1900 hours on normal weekdays
shall be taken. If construction works are extended to include works during the
period between 1900 and 0700 hours, additional weekly impact monitoring shall
be carried out during evening and night-time works.
1.5.5
Action
and Limit Levels for the noise monitoring are discussed in Section 3.5. Should non-compliance of the
criteria occur, action in accordance with the Event and Action Plan presented
in Appendix C shall be carried
out.
1.5.6
The
noise mitigation measures detailed in the EM&A Manual are recommended to be
implemented during the construction phase.
The implementation statuses of these measures are presented in Appendix D.
Environmental Requirements in
Contract Documents
1.5.7
According
to Particular Specification (PS), the Contractor shall undertake
environmental protection measures to reduce the environmental impacts arising
from the execution of the works. The
Contractor shall also observe and comply with relevant environmental protection
and pollution control ordinances. The
Contractor shall design, construct, operate and maintain pollution control
measures to ensure compliance with the contract provisions as well as the
environmental ordinances and their regulations.
1.5.8
The
Contractor shall also:
· Implement air pollution and noise abatement practices as specified in PS;
· Minimise generation of wastewater from the Site;
· On-site sorting of Construction and Demolition (C&D) materials;
· Establish a mechanism to record the quantities of C&D materials
generated each month, using the monthly summary “Waste Flow Table”;
· Control the use of timbers;
· Implement a trip ticket system (TTS) for tracking the removal of C&D
materials from the Site to the disposal grounds;
· Prepare an Environmental Management Plan (EMP) in accordance with GS
Section 25 and PS for
implementation on the Site to reduce environmental nuisance and C&D
materials arising from Works, throughout the construction period;
· Arrange weekly environmental walk to inspect the Site, checking that the
environmental performance of the Site is satisfactory and in compliance with
the requirements under the contract and EMP; and
· Carry out site specific induction training about environmental management
as well as safety for all staffs and workers, and provide toolbox talks for
workers on environmental nuisance abatement and waste management.
2.1.1
The air quality monitoring locations for impact
monitoring during the reporting period are listed in Table 2.1 and presented in Figure 2.1.
Table 2.1 Air Quality Monitoring
Stations for Construction Phase
|
ID |
Description |
Coordinates |
|
|
Northing |
Easting |
||
|
DM-1 |
Tennis
Court near Tin Ma Court |
822705 |
837047 |
|
DM-2 |
Chun
Sing House, Tin Ma Court |
822673 |
837143 |
|
DM-3 |
Grace
Methodist Church Kindergarten |
822782 |
837227 |
|
DM-4 |
Block
6, Tsui Chuk Garden |
822926 |
837246 |
|
DM-4a (1) |
Road pavement near Wang
King House, Tin Wang Court |
822854 |
837340 |
Notes:
1.
An
additional air quality monitoring station DM-4a was proposed by the ET and agreed
by the ER, IEC and EPD.
2.2.1
Table 2.2 summarized the monitoring parameter, duration, and
frequency of impact air quality monitoring.
Table 2.2 Impact
Air Quality Monitoring Parameter, Duration and Frequency
|
Parameter |
Frequency |
Duration |
|
1-hour TSP |
3 times every 6 days |
Throughout the
construction phase |
Proposal of Using Portable Direct Reading Dust Meter
2.3.1
Direct reading dust meters were used for measuring
1-hour TSP levels during the impact air quality monitoring. According to Section 4.4.1 of the EM&A
Manual, the proposed use of direct reading dust meters was submitted to and
agreed by the IEC.
2.3.2
Sufficient number of monitoring instruments was
prepared by the ET for carrying out the impact monitoring. All equipment and associated instrumentation
were clearly labelled.
2.3.3
Wind data were collected from the records of
Hong Kong Observatory Kai Tak Wind Station (22.30966N, 114.21336E), which is located at the
south-eastern side of runway of the former Kai Tak Airport about 4.5 km
south-east from the project site.
2.3.4
Equipment used in the impact air quality monitoring
programme is summarised in Table 2.3. Calibration certificates for the impact air
quality monitoring equipment are attached in Appendix E.
Table 2.3 Impact Air
Quality Monitoring Equipment
|
Equipment |
Brand and Model |
Serial No. |
Calibration Due Date |
|
Direct Reading Dust Meter |
Sibata LD-5R |
0Z4545 |
12/09/2025 |
|
882106 |
12/09/2025 |
||
|
942532 |
12/09/2025 |
Maintenance and Calibration
2.3.5
Direct reading dust meters have been calibrated
against high volume samplers (HVSs) annually.
A 2-day, three 3-hour measurement results per day from direct reading
dust meters were taken to compare with the sampling results from the HVSs. The correlation between the direct reading
dust meters and the HVSs were then concluded.
By accounting for the correlation factor, the direct reading dust meters
are considered to achieve comparable results as that of the HVSs.
2.3.6
The 1-hour TSP measurement follows the instruction
provided in the manufacturer's manual.
Before initiating a measurement, zeroing the portable dust meter was carried
out to ensure the accuracy of each measurement.
2.4.1
The
action and limit levels were established in accordance with the EM&A
Manual. Table 2.4 presents the action and limits levels for 1-hour
TSP monitoring. Should non-compliance of
the criteria occur, action in accordance with the Event and Action Plan
presented in Appendix C shall be carried out.
Table
2.4 Action and Limit Levels for 1-hour
TSP
|
Monitoring Station |
Action Level (µg/m3) |
Limit Level (µg/m3) |
|
DM-1 |
300.1 |
500 |
|
DM-2 |
289.0 |
|
|
DM-3 |
289.7 |
|
|
DM-4 |
294.9 |
|
|
DM-4a |
291.6 |
2.5.1
The impact air quality monitoring was conducted on 5, 10, 16, 22 and 28 April 2025.
The impact air quality monitoring schedule for the reporting period is
shown in Appendix F.
2.5.2
The monitoring results and graphical presentation of
impact air quality monitoring are shown in Appendix G. No action or limit levels
exceedance was recorded in the reporting period.
Table 2.5 Summary of Impact 1-hour TSP Monitoring
Results
|
Monitoring Station |
TSP Concentration, μg/m3 |
Action Level |
Limit Level |
||
|
Average |
Minimum |
Maximum |
|||
|
DM-1 |
40 |
20 |
60 |
300.1 |
500 |
|
DM-2 |
40 |
22 |
54 |
289.0 |
|
|
DM-3 |
48 |
27 |
67 |
289.7 |
|
|
DM-4 |
43 |
25 |
60 |
294.9 |
|
|
DM-4a |
55 |
34 |
75 |
291.6 |
|
2.5.3
During the impact air quality monitoring, the major
dust sources at each monitoring stations were summarized in Table 2.6.
Table 2.6 Influencing
Factors at/ near Air Quality Monitoring Stations
|
Monitoring Stations |
Influencing Factors |
|
DM-1 |
Not identified |
|
DM-2 |
Not identified |
|
DM-3 |
Not identified |
|
DM-4 |
Not identified |
|
DM-4a |
Not identified |
2.5.4
Weather conditions during impact monitoring are
presented in Appendix G and extracts of wind data recorded at Kai Tak Wind Station
available from the Hong Kong Observatory are presented in Appendix H.
3.1.1
The monitoring locations for construction noise
monitoring are listed in Table 3.1 and
shown in Figure 3.1.
Table
3.1 Noise Monitoring Stations during
Construction Phase
|
ID |
Description |
Measurement |
Coordinates |
|
|
Northing |
Easting |
|||
|
NM-2 |
Chun
Sing House, Tin Ma Court |
Façade |
822668 |
837143 |
|
NM-3 |
Grace
Methodist Church Kindergarten |
Façade |
822782 |
837227 |
|
NM-4 |
Block
6, Tsui Chuk Garden |
Façade |
822926 |
837246 |
|
NM-4a (1) |
Road pavement near Wang King House, Tin Wang Court |
Free field |
822854 |
837340 |
|
NM-5 (2) |
Wo
Tin House, Shatin Pass Estate |
Façade |
823360 |
838143 |
|
NM-6 (2) |
Sheung
Fung Street Customs Staff Quarters |
Free field |
823134 |
838412 |
Notes:
The noise monitoring station proposed in the EM&A
Manual (NM-1) was not available for baseline and impact monitoring. Therefore, impact monitoring at NM-1 was
cancelled and agreed by the ER, IEC and EPD.
(1) An additional noise monitoring station
NM-4a was proposed by the ET and agreed by the ER, IEC and EPD.
(2) Main laying works near NM-5 and NM-6 were
commenced in early September 2023. Noise
monitoring at NM-5 and NM-6 was commenced on 7 September 2023.
3.2.1
Construction noise level was measured by the ET and
measured in terms of the A-weighted equivalent continuous sound pressure level
(Leq). Leq(30-min) was adopted as the
monitoring parameter for the construction noise monitoring.
3.2.2
As supplementary information for data auditing,
statistical results such as L10
and L90 were also
obtained for reference.
3.2.3
Table 3.2 summarized the monitoring parameters, duration, and
frequency of construction noise monitoring.
Table
3.2 Construction Noise Monitoring Parameter,
Frequency and Duration
|
Parameters |
Time |
Frequency |
Duration |
|
Leq(30-min) |
0700 and 1900 hours on normal weekdays |
Once every week |
Throughout the construction phase |
3.3.1
As referred to the technical memorandum (TM) issued
under the NCO, sound level meters in compliance with the International
Electrotechnical Commission Publications 651: 1979 (Type 1) and 804: 1985 (Type
1) specifications were used for carrying out the construction noise monitoring.
3.3.2
Noise measurements were not made in fog, rain, wind
with a steady speed exceeding 5 m/s or wind with gusts exceeding 10 m/s. The wind speed was checked with a portable
wind speed meter capable of measuring the wind speed in m/s.
3.3.3
Sufficient number of noise measuring equipment and associated instrumentation
was prepared by the Environmental Team.
All the equipment and associated instrumentation were clearly labelled.
3.3.4
Wind data were collected from the records of
Hong Kong Observatory Kai Tak Wind Station (22.30966N, 114.21336E), which is located at the
south-eastern side of runway of the former Kai Tak Airport about 4.5 km
south-east from the project site.
3.3.5
The monitoring procedures are as follows:
·
For façade measurement, the monitoring station was
set at a point 1 m from the exterior of the sensitive receiver building façade
and set at a position 1.2 m above the ground.
For free-field measurement, the monitoring station was set at a position 1.2 m
above ground.
·
The
battery condition was checked to ensure good functioning of the meter.
·
Parameters
such as frequency weighting, the time weighting and the interval were set as
follows:
·
Frequency
weighting: A
·
Time
weighting: Fast
·
Interval:
30 minutes (Leq(30-min))
would be determined for daytime noise by calculating the logarithmic
average of six consecutive Leq(5-min)
data
·
Prior to and after each noise measurement, the meter
was calibrated using an acoustic calibrator for 94.0 dB at 1000 Hz. If the difference in the calibration level
before and after measurement is more than 1.0 dB, the measurement was
considered invalid and repeat of noise measurement will be required after
re-calibration or repair of the equipment.
·
At the end of the monitoring period, the values of Leq,
L90 and L10 were recorded. In addition, noise sources were recorded on a
standard record sheet.
3.3.6
Table 3.3 summarized the noise monitoring equipment used during the construction
noise monitoring. Calibration
certificates for the impact noise monitoring equipment are attached in Appendix E.
Table 3.3 Construction
Noise Monitoring Equipment
|
Equipment |
Model (Serial Number) |
Calibration Due Date |
|
Sound Level Meter |
SVANTEK-SVAN 971 (96062) |
23/7/2025 |
|
Sound Calibrator |
Rion NC-75 (34724243) |
03/10/2025 |
3.4.1
Maintenance and calibration procedures are as
follows:
· The microphone head of the sound level meter and calibrator were
regularly cleaned with a soft cloth; and
· The sound level meter and acoustic calibrator were calibrated annually by
a HOKLAS accredited laboratory or the manufacturer.
3.5.1
The Action and Limit Levels were established in
accordance with the EM&A Manual. Table 3.4 presents the Action and Limit Levels for construction noise. Should non-compliance of the criteria occur,
action in accordance with the Event and Action Plan presented in Appendix C shall be carried out.
Table
3.4 Action and Limit Levels for
Construction Noise Monitoring
|
Monitoring Stations |
Action Level |
Limit Level |
Time Period |
|
NM-2 |
When
one documented complaint is received |
75
dB(A) |
0700
- 1900 hours on normal weekdays |
|
NM-3 |
70/
65 dB(A) * |
||
|
NM-4 |
75
dB(A) |
||
|
NM-4a |
75
dB(A) |
||
|
NM-5 |
75
dB(A) |
||
|
NM-6 |
75
dB(A) |
Notes:
If works are to be carried out during restricted
hours, the conditions stipulated in the construction noise permit issued by the
Noise Control Authority have to be followed.
* 70 dB(A)
for school and 65 dB(A) during school examination period.
3.6.1
The construction noise monitoring was conducted on 10, 16, 22 and 28 April 2025. The monitoring schedule is
presented in Appendix F.
3.6.2
The construction noise monitoring results are
summarized in Table 3.5. No Action Level or Limit Level exceedance was
recorded in the reporting period.
Details of the results and graphical presentation are shown in Appendix I.
Table
3.5 Summary of Construction Noise
Monitoring Results
|
Monitoring Station |
Noise Level, dB(A) |
Limit Level |
||
|
Leq(30-min) |
||||
|
Mean |
Minimum |
Maximum |
|
|
|
NM-2 |
68.8 |
68.2 |
70 |
75 dB(A) |
|
NM-3 |
65.2 |
64 |
65.9 |
70/65 dB(A) (1) |
|
NM-4 |
63.8 |
63.1 |
64.6 |
75 dB(A) |
|
NM-4a |
73 |
72.8 |
73.5 |
75 dB(A) |
|
NM-5 (2) |
62.4 |
60.9 |
64.4 |
75 dB(A) |
|
NM-6 (2) |
67.5 |
66.7 |
68.1 |
75 dB(A) |
Note:
(1)
70 dB(A) for school and 65 dB(A) during school examination
period.
(2)
Impact monitoring at NM-5 and NM-6 was commenced on
7 September 2023.
3.6.3
Weather conditions during impact monitoring are
presented in Appendix I and extracts of wind data recorded at Kai Tak Wind Station
available from the Hong Kong Observatory are presented in Appendix H.
3.6.4
During the construction noise monitoring period, the
influencing factors which may affect the results are summarized in Table 3.6.
Table 3.6 Influencing
Factors at Noise Monitoring Stations
|
Monitoring Stations |
Influencing Factors |
|
NM-2 |
Road traffic noise,
construction noise from 76 Broadcast Drive project |
|
NM-3 |
Road traffic noise |
|
NM-4 |
Road traffic noise |
|
NM-4a |
Road traffic noise |
|
NM-5 |
Road traffic noise |
|
NM-6 |
Road traffic noise |
4.1.1
Waste generated from the Project includes inert
construction and demolition (C&D) materials and non-inert C&D wastes in
the reporting period. The amount of waste
generated by the construction works of the Project during the reporting period
is shown in Table 4.1 and the cumulative waste flow table was presented
in Appendix J.
Table 4.1 Summary of
Waste Generated in the Reporting Period
|
Month |
Actual Quantalities
of Inert C&D Materials Generated Monthly |
Actual Quantities
of C&D Wastes Generated Monthly |
Actual Quantities
of C&D Wastes Recycled |
|||||||||||||
|
Total Quantity
Generated |
Broken Concrete (including rock
for recycling into aggregates) |
Reused in the
Contract |
Reused in other
Projects |
Disposed as
Public Fill |
Imported Fill |
Metals |
Paper/ Cardboard
Packaging |
Plastics |
Chemical Waste |
Others e.g.,
general refuse |
Metals |
Paper/ cardboard
packaging |
Plastics (bottles/
containers, plastic sheets/foam package material) |
Yard Waste |
Others |
|
|
(in ‘000m3) |
(in ‘000m3) |
(in ‘000m3) |
(in ‘000m3) |
(in ‘000m3) |
(in ‘000m3) |
(in ‘000kg) |
(in ‘000kg) |
(in ‘000kg) |
(in ‘000kg) |
(in ‘000m3) |
(in ‘000kg) |
(in ‘000kg) |
(in ‘000kg) |
(in ‘000kg) |
(in ‘000m3) |
|
|
April 2025 |
3.6095 |
0.0000 |
0.0532 |
2.7593 |
0.7970 |
0.0000 |
0.0000 |
0.0000 |
0.0000 |
0.0000 |
0.0093 |
0.0000 |
0.0000 |
0.0000 |
0.0000 |
0.0000 |
4.1.2
Construction and demolition (C&D) materials
sorting was carried out on site. Sufficient
receptacles were provided for general refuse collection and sorting. Excavated inert C&D materials were reused
to minimize the disposal of C&D waste to public fill.
4.1.3
The Contractor was advised to minimize the amount of
waste through recycling or reusing. All
applicable mitigation measures stipulated in the EM&A Manual and waste
management plans shall be fully implemented.
4.1.4
The total amount of waste generated since
commencement of work was 27,094.6 m3 and recyclables generated from office are sent to San Po
Kong Recycling Store. Also, the main contractor was promoting plastic-free
culture at site so no more drinks in plastic bottles selling at site since July
2023 to minimize the generation of plastic wastes.
5.1.1
Site
inspections were carried out by the ET on a weekly basis to monitor the
implementation of proper environmental pollution control mitigation measures
for the Project. During the
reporting period, site inspections were carried out on 3, 11, 14 and 25 April 2025. A joint site inspection with the ER, the
Contractor and the IEC was carried out on 14 April 2025.
5.1.2
During
the site inspections in the reporting period, no non-conformance was
identified. Key observations and
reminders during the site inspections are described in Table 5.1.
Table 5.1 Summary of
Site Inspection Observations and Recommendations
|
Inspection Date |
Key Observations/ Reminders |
Follow-up Action |
|
3 April 2025 |
Portion 3 1.
Spilled oil in the work area and it need to be clean up. |
Cleaned (Closed on
5 April 2025) |
|
11 April 2025
|
No major
environmental deficiency
was observed |
N/A |
|
14
April 2025 |
Portion 3 1.Oil
should be removed as possible. 2.Drip
tray should be provided when placing drum to avoid land contamination and
chemical spill. |
Cleaned (Closed on
15 April 2025) Cleaned (Closed on
15 April 2025) |
|
25 April 2025 |
Work Area
Near Chuk Yuen Estate Bus Terminus 1.Drip
tray should be provided when placing drum to avoid land contamination and
chemical spill. |
Cleaned (Closed on
26 April 2025) |
5.1.3
According to the EIA Report, EP and the EM&A
Manual, the mitigation measures detailed in the documents are recommended to be
implemented during the construction phase.
A summary of the Project Implementation Schedule is provided in Appendix D.
6.1.1
No Action Level or Limit Level exceedance was
recorded for 1-hour TSP monitoring in the reporting period.
6.1.2
No Action Level or Limit Level exceedance was
recorded for construction noise monitoring in the reporting period.
6.1.3
Should
the monitoring results of the environmental monitoring parameters at any
designated monitoring stations indicate that the Action/ Limit Levels are
exceeded, the actions in accordance with the Event and Action Plans in Appendix C would be carried out.
6.2.1
No environmental non-compliance was recorded in the
reporting period.
6.3.1
No environmental complaint was received in the
reporting period. The Cumulative
Complaint Log is presented in Appendix K.
6.4.1
There was no successful environmental prosecution or
notification of summons received since the Project commencement. The Cumulative Log for environmental summon
and successful prosecution is presented in Appendix K.
7.1.1
The
construction programme for the Project for the next reporting period is
presented in Appendix A.
7.1.2
Works
to be undertaken in the next two months are summarized below:
Portions
1 & 3:
·
PAB 355
pipe piling
·
PAB
Excavation & Tie Back Installation
·
Pump
house E&M provision
·
CLP cable
draw pit and ducting construction
·
Tunnel
excavation Q1 continue arch install, shotcrete, Jumbo drilling works and
grouting
·
Tunnel
excavation Q2, pipe pile cutting and kick off excavation
·
Site Set up
- Shotcrete supply, disposal arrangement,
Portion
5:
·
Open
trench main laying works
·
ELS for
Receiving Pit
·
Reinstatement
works
·
Backfilling
works
·
Trial Pit
Works
·
Pipe
jacking work
7.1.3
Potential
environmental impacts arising from the above construction activities are mainly
associated with construction dust impact, noise impact, water quality impact,
waste management and landscape and visual.
7.2.1
The key
environmental mitigation measures for the Project in the coming reporting period
associated with the above construction activities will include:
Dust
·
Regular
watering to reduce dust emissions from the exposed site surface;
·
Stockpile
of dusty materials shall be covered entirely by impervious sheeting;
·
Provide
vehicles washing facilities at all site exits to wash away any dusty materials
from vehicle body;
·
NRMM
Labels should be displayed on the applicable equipment on site by the
Contractor;
·
All
vehicle and plant should be cleaned before they leave a construction site.
Noise
·
Only
well-maintained plant should be operated on-site, and plant should be
maintained regularly during the construction programme;
·
Quality
Powered Mechanical Equipment (QPME) should be adopted as far as possible.
Water Quality
·
No
effluent discharge would be allowed before the effluent discharge license is
acquired.
·
Surface
run-off from construction sites should be discharged into dedicated discharge
point via adequately designed sand/ silt removal facilities;
·
Channels/
earth bunds/ sandbags barriers should be provided on site to properly direct
stormwater to silt removal facilities;
·
Silt
removal facilities, channels and manholes should be maintained, and the
deposited silt and grit should be removed regularly;
·
Open
stockpiles of construction materials on sites should be covered with tarpaulin
or similar fabric during rainstorms;
·
Perimeter
channels should be provided on site boundaries where necessary to intercept
stormwater run-off from outside the site so that it will not wash across the
site;
·
Bare
slope should be covered completely by using canvas to reduce muddy surface
runoff during typhoons and rainstorms.
Waste Management
·
Provision
of sufficient waste disposal points and regular collection of waste;
·
Regular
cleaning and maintenance programme for drainage system;
·
Chemical
containers shall be stored with drip tray underneath;
·
Storage,
handling, transport, and disposal of chemical waste should be arranged in
accordance with the Code of Practice on the Packaging, Labelling and Storage of
Chemical Wastes published by EPD, and collected by a licensed chemical waste
collector.
Ecology
·
Minimize
loss of habitats and associated wildlife;
·
Using
directional lighting to prevent excessive light spill into adjacent natural
habitat and disturbance to nocturnal fauna.
Landscape and Visual
·
Adequate
tree protection measures shall be provided for the trees to be retained on
site.
8.1.1
This is the 25th Monthly
EM&A Report presenting the EM&A works during the reporting period from
1
April to 30 April 2025 in accordance with the EM&A
Manual.
8.1.2
No Action Level or Limit Level exceedance was recorded for 1-hour TSP
monitoring in the reporting period.
8.1.3
No Action Level or Limit Level exceedance was
recorded for construction noise monitoring in the reporting period.
8.1.4
Environmental site inspections were conducted on 3, 11, 14 and 25 April 2025 by the ET in the reporting period.
8.1.5
No
environmental complaint was received in the reporting period.
8.1.6
No notification
of summons and prosecution was received in the reporting period.
8.1.7
The ET
will keep track on the construction works to confirm compliance of
environmental requirements and the proper implementation of all necessary
mitigation measures.
8.1.8
No change
to the EM&A programme was made in this reporting period.
8.2.1
The proposed mitigation measures were properly
implemented and were considered effective and efficient in pollution control.
8.2.2
The ET had no recommendation following the
completion of EM&A in the reporting period.