EXECUTIVE
SUMMARY
1.
This is the 25th
Environmental Monitoring and Audit (EM&A) Report prepared by the Environmental
Team (ET), Cinotech Consultants Ltd., for Contract No. ED/2018/04 “Trunk Road T2 and
Infrastructure Works for Developments at the Former South Apron”. This
report summarized the monitoring results and audits findings of the EM&A
programme under the issued Environmental Permit (EP) No. EP-458/2013/C and in
accordance with the EM&A Manual (AEIAR-173/2013) during the reporting month
of May 2022.
2. The main works undertaken during the
reporting period are as follows:
• East Ventilation Building - Excavation
• Drill & Blast Tunnel - CP33 blasts
• West bound – Kicker concreting
• East bound – Service Gallery Installation, Tunnel Excavation
• Logistic Steel Deck
3. Implementation of the key mitigation
measures during the reporting period are as follows:
Construction Noise
• Construction activities were scheduled to minimize noise nuisance to
the nearby sensitive receiver.
• Use of Quality Powered Mechanical Equipment (QPME) on site.
• Erected the noise barrier on site.
Air Quality
• Regularly watering on site to avoid dust generation.
Landscape and Visual
• Tree protection zones were fenced off to protect the existing trees
on site.
4. Environmental monitoring for the Project
was performed in accordance with the EM&A Manual and the monitoring results
were checked and reviewed. Site Inspections/Audits were conducted once per
week. The implementation of the environmental mitigation measures, Event Action
Plans and environmental complaint handling procedures were also checked.
5. Summary of the non-compliance (exceedance) in the reporting month
for the Project is tabulated in Table I.
Table I Non-compliance
(exceedance) Record
for the Project in the Reporting Month
|
Environmental Monitoring
|
No. of
Non-compliance (Exceedance)
|
No. of Non-compliance (Exceedance)
due to Construction Activities of this
Project
|
Action Taken
|
|
Action Level
|
Limit Level
|
Action Level
|
Limit Level
|
|
Air Quality
|
0
|
0
|
0
|
0
|
N/A
|
|
Noise
|
0
|
1
|
0
|
0
|
Detail refer to App N
|
|
Marine Water Quality
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
|
Groundwater Level Monitoring (Piezometer
Monitoring)
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
|
Ecological
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
|
Cultural Heritage
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
|
Landfill Gas
|
N/A(1)
|
N/A
|
N/A(1)
|
N/A
|
N/A
|
|
Note: (1): No Action
Level for Landfill Gas Monitoring.
|
Air Quality Monitoring
6.
No Action/Limit Level
exceedance for 1-hour TSP monitoring was recorded.
7.
No Action/Limit Level
exceedance for 24-hour TSP monitoring was recorded.
Construction Noise
Monitoring
8.
No Action Level exceedance was
recorded due to documented complaint in the reporting month. The Summary of Documented
Complaints in the Reporting Month is tabulated in Table III.
9.
One (1) Limit Level exceedance
for day time construction noise monitoring were recorded in the reporting
month. Detail shall refer to Appendix N.
Water Quality Monitoring
10. Groundwater quality monitoring had been
suspended since October 2019 upon the agreement by EPD. Further details should be founded at Section 4.1.
11. No marine water quality monitoring is
required as no marine works will be conducted at the Cha Kwo
Ling and Lam Tin areas for this project.
12.
As the construction activity is approximately 120m away from the
piezometer gate, no piezometer monitoring is required.
Waste Management
13. Wastes generated from this Project include inert construction and
demolition (C&D) materials, and non-inert C&D materials. Details of
waste management data is presented in Appendix
H.
Ecological Monitoring
14. No coral monitoring is required as no marine works will be conducted
at the Cha Kwo Ling and Lam Tin areas for this
project.
Fisheries Impact Monitoring
15. No specific fisheries monitoring programme
is required during the construction phase.
Monitoring on Cultural
Heritage
16. As the construction works of Cha Kwo Ling Tunnel from the end of Trunk Road T2 to the TKOLTT
at the Eastern Ventilation Building are located more than 100m away from the
Cha Kwo Ling Tin Hau
temple, no monitoring on cultural heritage is required.
Landscape and Visual
Monitoring and Audit
17. The implementation of landscape and visual mitigation measures was
checked by a registered landscape architect. Recommended follow-up actions have
been discharged by the Contractor.
Details of the audit findings and implementation status are presented in
Section 12.
Landfill Gas Monitoring
18. Monitoring of landfill gases was commenced
in December 2016. Since no
excavation activity for this Project was carried out within the Sai Tso Wan
Landfill Consultation Zone in the reporting month, no landfill gas monitoring
is required
Hazard to Life Monitoring
19. No environmental monitoring and audit is
required as no hazard assessment was conducted.
Environmental Site Inspection
20. Joint weekly site inspections were conducted by representatives of
the Contractor, Engineer and Environmental Team. Details of the audit findings
and implementation status are presented in Section
12.
21. Summary of key information in the reporting month is tabulated in Table II
Table II Summary
of Complaints, Notifications of Summons and Successful Prosecutions in the
Reporting Month
|
Event
|
Event Details
|
Action Taken
|
Status
|
|
Number
|
Nature
|
|
Complaints Received
|
0
|
--
|
N/A
|
N/A
|
|
Notifications of any
summons & prosecutions received
|
0
|
--
|
N/A
|
N/A
|
22. Summary of complaints received in the reporting month is tabulated
in Table III.
Table
III Summary of
Complaints Details in Reporting Month
|
Complaint
Type
|
Investigation Findings
|
Follow-up Action / Mitigation Measure
|
|
-
|
-
|
-
|
23. No reporting change in the reporting month.
24. The key works or activities will be anticipated
in the next reporting period are as follows:
Table IV
Summary Table for Site Activities in the next Reporting Period
|
Site
Activities (June 2022)
|
by Environmental Issues
|
|
|
|
1.
West bound – Kicker concreting
2.
East bound – Type C Service Gallery Installation
3.
Branch Tunnel – Kicker concreting
4.
East Ventilation Building – Excavation,
Blinding & Waterproofing
5. Drill
& Blast Tunnel - CP33 blasts
|
(A) / (B) / (C) / (D)
|
|
|
Note:
(A) Dust generation
from haul road, stockpile of
dusty materials, exposed site area, excavation works and rock breaking
activities;
(B) Noisy construction activity such as
rock-breaking activities and piling works;
(C) Runoff from exposed slope or site area;
and
(D) Wastewater and runoff discharge from site.
|
|
1
INTRODUCTION
1.1
In 2009, Civil Engineering and
Development Department (CEDD) commissioned a Kai Tak Development (KTD) – Trunk Road T2 and Infrastructure at
South Apron Investigation. The assignment covers the provision of the Trunk Road T2 and its
connections with the Central Kowloon Route (CKR) at the north apron area and
the Tseung Kwan O – Lam Tin Tunnel (TKOLTT) to the south in the Cha Kwo Ling area.
1.2
The Trunk Road T2 Project is
one of the designated Projects under Schedule 2 of the EIAO proposed in the KTD. CEDD submitted the Project Profile (No. PP-379/2009)
on 24 March 2009 for application for an EIA study brief for the Trunk Road T2
Project under the EIAO. Accordingly, an EIA Study Brief (ESB-203/2009) for the
Trunk Road T2 Project was issued on 30 April 2009. The Environmental Impact Assessment (EIA) Report for the Trunk Road T2
Project was approved under the Environmental Impact Assessment Ordinance (EIAO)
on 19 September 2013. The corresponding Environmental Permit (EP) was issued on
19 September 2013 (EP no.: EP-451/2013).
1.3
The Contract No. ED/2018/04 is
the main contract of Trunk Road T2 (“T2 Main Works”) which comprises mainly the
design and construction of a dual two-lane trunk road of approximately 3.0km
long with about 2.7km of the trunk road in form of tunnel; ventilation and
administration buildings, environmental protection and mitigation works and
etc. The EM&A programme under this Contract is
governed by the two EPs (EP-451/2013 and EP-458/2013/C) and two EM&A
Manuals (AEIAR-174/2013 and AEIAR-173/2013). The work areas of the T2 Main Works
are shown in Figure 1 and the works
to be executed under this Contract and corresponding EPs are summarized as
follows:
|
Environmental Permit
|
Works Description
|
|
EP-451/2013 –
Trunk Road T2
|
Trunk Road T2
· Construction of highway and sub-sea tunnel
connecting between Central Kowloon Route and Cha Kwo
Ling Tunnel
· Western & Eastern Ventilation Buildings
|
|
EP-458/2013/C –
Tseung Kwan O – Lam Tin Tunnel (TKOLTT) and Associated Works
|
Cha Kwo Ling Tunnel
Construction of
Cha Kwo Ling Tunnel from the end of Trunk Road T2
to the TKOLTT at the Eastern Ventilation Building
|
Monitoring Works in Lam Tin under
EP-458/2013/C
1.4
Under Agreement No. CE 59/2015
(EP) – Tseung Kwan O – Lam Tin Tunnel (TKOLLT) and Associated Works, the baseline
monitoring works in Lam Tin under the EM&A Manual (AEIAR-173/2013) were
conducted by the Environmental Team (ET) for the Agreement No. CE 59/2015 (EP)
at the approved monitoring locations, namely AM1, AM2, AM3, AM4, AM4 (A) CM1,
CM2, CM3, CM4 and CM5. Impact monitoring within the Lam Tin area shall be
conducted by the ET of Contract No. ED/2018/04 upon cessation of Agreement No.
CE 59/2015 (EP). The data obtained from the impact monitoring works completed
by the ET of Agreement No. CE 59/2015 (EP) will be adopted in this report.
1.5
Cinotech Consultants Ltd. was designated as the
Environmental Team (ET) to undertake the EM&A works for “Trunk Road T2 and Infrastructure Works for
Developments at the Former South Apron” (hereinafter called the
“Project”).
1.6
This
is the 25th Monthly EM&A Report which summarises
the impact monitoring results and audit findings for the EM&A programme during the reporting period in May 2022.
1.7
Different Parties with
different levels of involvement in the Project organization include:
• Permit Holder – Civil Engineering and Development Department (CEDD)
•
Supervisor
Representative – Hyder-Meinhardt Joint Venture (HMJV)
• Environmental Team (ET) – Cinotech
Consultants Limited (Cinotech)
• Independent Environmental Checker (IEC) – Ramboll Hong Kong Limited
(Ramboll)
• Contractor – Bouygues Travaux Publics (BTP)
1.8
The key contacts of the Project are shown in Table 1.1.
Table 1.1 Key
Project Contacts
|
Party
|
Role
|
Contact Person
|
Phone No.
|
|
CEDD
|
Permit Holder
|
Mr. Wong Chi Wai, Tommy
|
3842 7111
|
|
HMJV
|
Supervisor Representative
|
Ms. Hazel Tang
|
2149 8524
|
|
Cinotech
|
Environmental Team
|
Mr. KS Lee (ETL)
|
2151 2091
|
|
Ms. Karina Chan
|
2157 3880
|
|
Ramboll
|
Independent Environmental Checker
|
Mr. YH Hui
|
3465 2850
|
|
BTP
|
Contractor
|
Ms. Ality Chan
|
5185 4462
|
|
|
1.9
The Organizational Structure for Environmental Management is shown in Figure 1.2.
1.10
The major site activities
undertaken in the reporting month included:
•
East Ventilation Building -
Excavation
•
Drill & Blast Tunnel - CP33
blasts
•
West bound – Kicker concreting
•
East bound – Service Gallery
Installation, Tunnel Excavation
•
Logistic Steel Deck
1.11
The EM&A programme requires
construction noise, air quality monitoring and 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 Action Plans;
•
Environmental mitigation
measures, as recommended in the Project EIA Report.
1.12
The advice on the
implementation status of environmental protection and pollution
control/mitigation measures is summarized in Section 12 of this report.
1.13
This report presents the monitoring
results, observations, locations, equipment, period, methodology and QA/QC
procedures of the monitoring parameters of the required environmental
monitoring works and audit works for the Project in May 2022.
1.14
All permits/licenses obtained for the Project are summarized
in Table 1.2.
Table
1.2 Summary
of Environmental License and Permit
|
Permit / License No.
|
Valid Period
|
Status
|
|
From
|
To
|
|
Environmental
Permit (EP)
|
|
EP-451/2013
|
19 Sep 2013
|
N/A
|
Valid
|
|
EP-458/2013/C
|
20 Jan 2017
|
N/A
|
Valid
|
|
Notification pursuant to Air Pollution
(Construction Dust) Regulation
|
|
Ref. No.: 451120
|
20 Nov 2019
|
N/A
|
Valid
|
|
Billing Account for Construction Waste
Disposal
|
|
A/C No.: 7036016
|
09 Dec 2019
|
N/A
|
Valid
|
|
Construction Noise Permit
|
|
CNP No. (For Portion Q): GW-RE0227-22
|
24 Mar 2022
|
23 Sep 2022
|
Valid
|
|
CNP No. (For Portion T1): GW-RE0199-22
|
05 Mar 2022
|
04 July 2022
|
Valid
|
|
CNP No. (For Portion T1): GW-RE0408-22
|
08 May 2022
|
07 July 2022
|
Valid
|
|
Wastewater Discharge License
|
|
WT00036699-2020
|
14 Jan 2021
|
31 Jan 2026
|
Valid
|
|
Chemical Waste Producer License
|
|
WPN: 5213-286-B2557-03
|
09 Mar 2020
|
N/A
|
Valid
|
2.1
According to Section 2.2.4 of
the EM&A Manual (AEIAR-173/2013), 1-hour and 24-hour Total Suspended Particulates (TSP) monitoring
was conducted to monitor the air quality for this Project. For regular impact
monitoring, a sampling frequency of at least once in every six days at all of
the monitoring stations for 1-hour and 24-hour TSP monitoring. Appendix A shows the established Action/Limit Levels for the environmental
monitoring works.
2.2
Five designated monitoring
stations were selected for air quality monitoring programme. Table 2.1 describes the air quality
monitoring locations, which are also depicted in Figure 2.
Table 2.1 Air Quality Monitoring Locations
|
Monitoring Stations
|
Location
|
Location of Measurement
|
|
AM1
|
Tin Hau
Temple
|
Ground Level
|
|
AM2
|
Sai Tso Wan Recreation Ground
|
Ground Level
|
|
AM3
|
Yau Lai Estate Bik Lai House
|
Rooftop (41/F)
|
|
AM4(1)
|
Sitting-out Area at Cha Kwo Ling Village
|
Ground Level
|
|
AM4(A)(2) (*)
|
Cha Kwo
Ling Public Cargo Working Area Administrative Office
|
Rooftop (3/F)
|
Remarks:
(1) For 1-hour TSP monitoring;
(2) For 24-hour TSP monitoring
(*) Air quality monitoring at designated
station AM4 (24-hr TSP) was rejected by the premise owners.
Therefore, baseline
and impact air quality
monitoring works were carried out at alternative air quality monitoring
stations AM4 (A) (24-hr TSP only)
2.3
Table 2.2 summarizes the monitoring
parameters, monitoring period and frequencies of impact air quality monitoring.
The monitoring schedule is shown in
Appendix D.
Table 2.2 Frequency and Parameters of Air Quality
Monitoring
|
Monitoring Stations
|
Parameter
|
Period
|
Frequency
|
|
AM1, AM2, AM3, AM4
|
1-hour TSP
|
0700 – 1900
|
3
times per 6 days
|
|
AM1, AM2, AM3, AM4(A)
|
24-hour TSP
|
24 hours
|
Once every 6 days
|
2.4
High Volume Samplers (HVS) in
compliance with the specification stipulated in the EM&A Manual
(AEIAR-173/2013), Section 2.3.1, were used to carry out 24-hour TSP monitoring.
Direct reading dust meter were also used to measure 1-hour average TSP levels.
The 1-hour sampling was determined by HVS to check the validity and accuracy of
the results measured by direct reading method.
2.5
Wind data monitoring equipment
was set at rooftop (about 41/F) of Yau Lai Estate Bik
Lai House for logging wind speed and wind direction such that the wind sensors
are clear of obstructions or turbulence caused by building. The wind data
monitoring equipment is re-calibrated at least once every six months and the
wind directions are divided into 16 sectors of 22.5 degrees each. The location
is shown in Figure 2. This weather information for the reporting month is
summarized in Appendix C.
2.6
Table 2.3 summarizes the equipment used for air quality monitoring by the ET
for Contract No. CE 59/2015 (EP). Copies of calibration certificates are
attached in Appendix B.
Table
2.3
Air Quality Monitoring Equipment
|
Equipment
|
Model
|
Quantity
|
|
1-hour TSP Dust
Meter
|
Sibata
Model No. LD-5R
(Serial No.: 972781, 972778)
|
2
|
|
HVS Sampler
|
TISCH Model: TE-5170 (Serial No.: 1536)
|
1
|
|
GMW model: GS2310
(Serial No.: 1287, 10379, 10599)
|
3
|
|
Calibrator
|
TISCH Model: TE-5025A
(Serial No.: 3864)
|
1
|
|
Wind Anemometer
|
Davis Weather
Monitor II, Model no. 7440
(Serial No.:
MC01010A44)
|
1
|
1-hour TSP Monitoring
Measuring Procedures
2.7
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
2.8
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.
24-hour TSP Monitoring
Instrumentation
2.9
High volume samplers (HVS) (TISCH Model: TE-5170
and GMW Model: GS2310) completed with appropriate sampling inlets were employed
for 24-hour TSP monitoring. The
sampler was composed of a motor, a filter holder, a flow controller and a
sampling inlet and its performance specification complied with that required by
USEPA Standard Title 40, Code of Federation Regulations Chapter 1 (Part 50).
2.10
The positioning of the HVS
samplers are as follows:
·
A
horizontal platform with appropriate support to secure the samplers against gusty
wind shall be provided;
·
No
two samplers shall be placed less than 2 meter apart;
·
The
distance between the sampler and an obstacle, such as buildings, must be at
least twice the height that the obstacle protrudes above the sampler;
·
A
minimum of 2 metres of separation from walls, parapets and penthouses is
required for rooftop samplers;
·
A
minimum of 2 metres of separation from any supporting structure, measured
horizontally is required;
·
No
furnace or incinerator flue is nearby;
·
Airflow
around the sampler is unrestricted;
·
The
sampler is more than 20 metres from the dripline;
·
Any
wire fence and gate, to protect the sampler, shall not cause any obstruction
during monitoring;
·
Permission
must be obtained to set up the samplers and to obtain access to the monitoring
stations; and
·
A
secured supply of electricity is needed to operate the samplers.
Operating/analytical
procedures for the operation of HVS
2.11
Operating/analytical procedures
for the air quality monitoring are highlighted as follows:
·
Prior to the commencement of
the dust sampling, the flow rate of the high volume sampler was properly set (between 0.6 m3/min.
and 1.7 m3/min.) in accordance with the EM&A manual (AEIAR-173/2013). The flow rate shall be indicated
on the flow rate chart.
·
For
TSP sampling, fiberglass filters with a collection efficiency of > 99% for
particles of 0.3μm diameter were used.
·
The
power supply was checked to ensure the sampler worked properly. On sampling, the sampler was operated
for 5 minutes to establish thermal equilibrium before placing any filter media
at the designated air monitoring station.
·
The
filter holding frame was then removed by loosening the four nuts and a weighted
and conditioned filter was carefully centered with
the stamped number upwards, on a supporting screen.
·
The
filter was aligned on the screen so that the gasket formed an airtight seal on
the outer edges of the filter. Then
the filter holding frame was tightened to the filter holder with swing bolts.
The applied pressure should be sufficient to avoid air leakage at the edges.
·
The
shelter lid was closed and secured with the aluminum
strip.
·
The
timer was then programmed.
Information was recorded on the record sheet, which included the
starting time, the weather condition and the filter number (the initial weight
of the filter paper can be found out by using the filter number).
·
After
sampling, the filter was removed and sent to the HOKLAS laboratory (ALS Technichem (HK) Pty Ltd.) for weighing. The elapsed time was also recorded.
·
Before
weighing, all filters were equilibrated in a conditioning environment for 24
hours. The conditioning environment temperature should be between 25°C and 30°C
and not vary by more than ±3°C; the relative humidity (RH) should be < 50%
and not vary by more than ±5%. A convenient working RH
is 40%.
Maintenance/Calibration
2.12
The following maintenance/calibration is required for the HVS:
·
The
high volume motors and their accessories were properly maintained. Appropriate
maintenance such as routine motor brushes replacement and electrical wiring
checking were made to ensure that the equipment and necessary power supply are
in good working condition.
High volume samplers were
calibrated at bi-monthly intervals using TE-5025A Calibration Kit
throughout all stages of the air quality monitoring.
2.13
The
impact monitoring works for
air quality monitoring locations AM1, AM2, AM3, AM4 and AM4 (A) are completed
by the ET of Agreement No. CE 59/2015 (EP), and the data will be adopted in
this report.
2.14
The impact air quality
monitoring was conducted at all five monitoring stations as scheduled. The
monitoring schedule is shown in Appendix D.
2.15
No Action/ Limit Level
exceedance were recorded for 24-hour TSP monitoring in the reporting month.
2.16
No Action/ Limit Level exceedance
was recorded for 1-hour TSP monitoring in the reporting month.
2.17
The monitoring data and
graphical presentations of 1-hour and 24-hour TSP monitoring results are shown
in Appendix E and Appendix F respectively.
2.18
According to field observations
by ET for Agreement No. CE 59/2015 (EP) in the reporting period, the major dust
source identified at the designated air quality monitoring stations are as
follows:
Table 2.4 Major
Dust Source during Air Quality Monitoring
|
Monitoring
Stations
|
Major Dust Source
|
|
AM1 – Tin Hau Temple
|
Road Traffic
at Cha Kwo Ling Road, non-project related influence
and the construction activity from other construction site
|
|
AM2 – Sai Tso Wan Recreation Ground
|
Road Traffic
along Sin Fat Road
|
|
AM3 – Yau Lai Estate Bik Lai House
|
Road Traffic
near Eastern Cross Harbour Tunnel Toll Plaza, non-project related influence
and the construction activity from other construction site
|
|
AM4 - Sitting-out Area at Cha Kwo Ling
Village
|
Road Traffic
at Cha Kwo Ling Road
|
|
AM4(A) - Cha Kwo Ling Public Cargo
Working Area Administrative Office
|
Road Traffic
at Cha Kwo Ling Road
|
Comparison
of EM&A Result with EIA Prediction
2.19
The air monitoring data was
compared with the predictions (with the assessment height of 1.5 mAG) in Table 3.17 of EIA Report, AEIAR-173/2013 (as
approved in 2013) as summarised in Table
2.5 and Table 2.6.
Table
2.5 Comparison of
1-hr TSP Monitoring Data with Predictions in EIA Report
|
Monitoring Stations
|
ASR ID
|
Predicted Maximum 1-hr TSP Concentration in EIA Report (AEIAR-173/2013), μg/m3
|
Maximum 1-hr TSP
Concentration
in the Reporting Month
(May 2022),
μg/m3
|
|
AM1 – Tin Hau Temple
|
CL1
|
707
|
105.0
|
|
AM2 – Sai Tso Wan
Recreation Ground
|
CL6
|
266
|
48.4
|
|
AM3 – Yau
Lai Estate Bik Lai House
|
CL9
|
507
|
107.1
|
|
AM4 - Sitting-out Area at
Cha Kwo Ling Village
|
CL16
|
430
|
117.6
|
Table
2.6 Comparison of
24-hr TSP Monitoring Data with Predictions in EIA Report
|
Monitoring Stations
|
ASR ID
|
Predicted Maximum 24-hr TSP
Concentration
in EIA
Report (AEIAR-173/2013), μg/m3
|
Maximum 24-hr TSP
Concentration
in the Reporting Month
(May 2022),
μg/m3
|
|
AM1 – Tin Hau Temple
|
CL1
|
199
|
87.1
|
|
AM2 – Sai Tso Wan
Recreation Ground
|
CL6
|
109
|
49.1
|
|
AM3 – Yau
Lai Estate Bik Lai House
|
CL9
|
123
|
81.8
|
|
AM4(A) - Cha Kwo Ling Public Cargo Working Area Administrative Office (*)
|
N/A(1)
|
N/A(1)
|
104.1
|
Remarks:
(1)
No 24-hr TSP concentration was predicted in EIA
Report (AEIAR-173/2013)
(*) Air quality monitoring at designated station
AM4 (24-hr TSP) was rejected by the premise owners. Therefore, baseline and
impact air quality monitoring works were carried out at
alternative air quality monitoring stations AM4 (A) (24-hr TSP only)
2.20
In the reporting month, the
1-hour TSP concentrations at AM1, AM2, AM3 and AM4 were lower than the
prediction in the EIA Report, AEIAR-173/2013 (as approved in
2013). No Action/Limit level exceedance was recorded in
the reporting period.
2.21
In the reporting month, the
24-hour TSP concentrations at AM1 AM2 and AM3 were lower than the prediction in
the EIA Report, AEIAR-173/2013 (as approved in 2013). No Action/ Limit level exceedance was recorded in the reporting
period. Details of the exceedance shown in Appendix
N.
3
noise
Monitoring Requirements
3.1
According to Section 3.2.1 of the EM&A Manual (AEIAR-173/2013), construction noise monitoring
was conducted to monitor the construction noise arising from the construction
activities. The regular monitoring frequency for each monitoring station shall
be on a weekly basis and conduct one set of measurements between 0700 and 1900
hours on normal weekdays. Appendix A
shows the established Action and Limit Levels for the environmental monitoring
works.
Monitoring Locations
3.2
Noise monitoring was conducted
at five designated monitoring stations, namely CM1, CM2, CM3, CM4 and CM5 in
the reporting period. Table 3.1 and Figure 2 show the locations of these
stations.
Table
3.1 Noise Monitoring Stations
|
Monitoring Stations
|
Location
|
Location of Measurement
|
|
CM1
|
Nga Lai House, Yau Lai Estate Phase 1, Yau
Tong
|
Rooftop (41/F)
|
|
CM2
|
Bik Lai House, Yau Lai Estate Phase 1, Yau
Tong
|
Rooftop (41/F)
|
|
CM3
|
Block S, Yau Lai Estate Phase 5, Yau
Tong
|
Rooftop (40/F)
|
|
CM4
|
Tin Hau Temple, Cha Kwo Ling
|
Ground Level
|
|
CM5
|
CCC Kei Faat Primary School, Yau Tong
|
Rooftop (6/F)
|
Monitoring
Parameters, Frequency and Duration
3.3
Table 3.2 summarizes the monitoring
parameters, frequency and total duration of monitoring. The noise monitoring schedule is shown
in Appendix D.
Table 3.2
Frequency and Parameters of Noise Monitoring
|
Monitoring
Stations
|
Time Period
|
Duration
|
Frequency
|
Parameter
|
Measurement
|
|
CM1
|
0700-1900 hrs on normal weekdays
|
30 minutes
|
Once per week
|
L10(30
min.) dB(A)
L90(30
min.) dB(A)
Leq(30 min.) dB(A)
|
Façade Measurement
|
|
CM2
|
Façade Measurement
|
|
CM3
|
Façade Measurement
|
|
CM4
|
Façade Measurement
|
|
CM5
|
Façade Measurement
|
Monitoring Equipment
3.4
Integrating Sound Level Meter
was used for impact noise monitoring. The meters were Type 1 sound level meter
capable of giving a continuous readout of the noise level readings including
equivalent continuous sound pressure level (Leq)
and percentile sound pressure level (Lx) that also complied with
International Electrotechnical Commission Publications 651:1979 (Type 1) and
804:1985 (Type 1) specifications. Table 3.3 summarizes the noise monitoring equipment being used by the ET for Agreement No. CE 59/2015 (EP) within the reporting period. Copies of calibration certificates are
attached in Appendix B.
Table
3.3
Noise Monitoring Equipment
|
Equipment
|
Model
|
Quantity
|
|
Integrating Sound
Level Meter
|
SVAN 957 (Serial No.:
23852, 21455)
|
2
|
|
Calibrator
|
ST-120
(Serial No.: 181001608)
|
1
|
Monitoring
Methodology and QA/QC Procedure
3.5
The monitoring procedures are
as follows:
·
The monitoring station was normally be at a point 1m from the exterior of
the sensitive receivers building façade and be at a position 1.2m above the
ground.
·
For free field measurement, the
meter was
positioned away from any nearby reflective surfaces. All records for free field noise levels were
adjusted with a correction of +3 dB(A).
·
The battery condition was checked to ensure the correct functioning of
the meter.
·
Parameters such as frequency
weighting, the time weighting and the measurement time were set as follows:
-
Frequency weighting: A
-
Time weighting: Fast
-
Time measurement: 30 minutes
·
Prior to and after each noise
measurement, the meter was calibrated using a Calibrator for 94.0 dB at 1000
Hz. If the difference
in the calibration level before and after measurement was more than 1.0 dB, the
measurement would be considered invalid and repeat of noise measurement would
be required after re-calibration or repair of the equipment.
·
The wind speed was frequently
checked with the portable wind meter.
·
At the end of the monitoring
period, the Leq, L90 and L10
were
recorded. In addition, site
conditions and noise sources were recorded on a standard record sheet.
·
Noise monitoring would be
cancelled in the presence of fog, rain, and wind with a steady speed exceeding 5 m/s, or wind with gusts exceeding 10 m/s. Supplementary monitoring would be provided to ensure sufficient data
would be obtained.
3.6
The microphone head of the
sound level meter and calibrator were cleaned with a soft cloth at quarterly
intervals.
3.7
The sound level meter and
calibrator were checked and calibrated at yearly intervals.
3.8
Immediately prior to and
following each noise measurement the accuracy of the sound level meter was
checked using an acoustic calibrator generating a known sound pressure level at
a known frequency. Measurements were accepted as valid only if the calibration
levels from before and after the noise measurement agree to within 1.0 dB.
Results
and Observations
3.9
The
data obtained from the impact
monitoring works completed by the ET of Agreement No. CE 59/2015 (EP) will be
adopted in this report.
3.10
No Action Level exceedance was
recorded due to the documented complaint in the reporting month.
3.11
One(1) Limit Level exceedance
was recorded for day-time construction noise monitoring in the reporting month.
Detail shall refer to Appendix N.
3.12
Noise monitoring results and
graphical presentations are shown in Appendix G.
3.13
According to field observations
by ET for Agreement No. CE 59/2015 (EP) in the reporting period, the major
noise sources identified at the noise monitoring stations are shown in Table 3.4.
Table 3.4 Other
Noise Source Identified during Noise Monitoring
|
Monitoring
Stations
|
Major Noise Source
|
|
CM1
|
Road Traffic near Eastern Cross Harbour
Tunnel Toll Plaza, non-project related construction activities
|
|
CM2
|
Road Traffic near Eastern Cross Harbour
Tunnel Toll Plaza, non-project related construction activities
|
|
CM3
|
Road Traffic near Eastern Cross Harbour
Tunnel Toll Plaza non-project related construction activities
|
|
CM4
|
Road
Traffic at Cha Kwo Ling Road, non-project related
construction activities
|
|
CM5
|
Road
Traffic near Eastern Cross Harbour Tunnel Toll
Plaza,
Construction
activity from other construction site,
Road
Traffic at Yau Tong Road
|
.
Table 3.5 Baseline Noise
Level and Noise Limit Level for Monitoring Stations
|
Monitoring
Stations
|
Baseline
Noise Level, dB (A)
(at 0700 – 1900 hrs on normal weekdays)
|
Noise
Limit Level, dB (A) (at 0700 – 1900 hrs on normal weekdays)
|
|
CM1
|
65.5
|
75
|
|
CM2
|
63.6
|
|
CM3
|
65.6
|
|
CM4
|
62.0
|
|
CM5
|
68.2
|
70*
|
(*)
Noise Limit Level is 65 dB(A) during school examination periods.
Comparison of EM&A Result with EIA Prediction
3.14
The noise monitoring data was
compared with the predictions in Table 4.15 of EIA Report (AEIAR-173/2013) as
summarised in Table 3.6.
Table 3.6 Maximum Predicted
Mitigated Construction Noise Levels in EIA Report
|
Monitoring Stations
|
NSR ID
|
Maximum Predicted Mitigated
Construction Noise Levels in EIA Report (AEIAR-173/2013),
dB(A)
|
Maximum Construction Noise Levels in
the Reporting
Month
(May 2022),
Leq (30min) dB(A)
|
|
CM1 – Nga Lai
House, Yau Lai Estate Phase 1, Yau
Tong
|
N1102
|
73
|
77.9
|
|
CM2 – Bik Lai
House, Yau Lai Estate Phase 1, Yau
Tong
|
N1204
|
75
|
75.4
|
|
CM3 – Block S,
Yau Lai Estate Phase 5, Yau
Tong
|
N2105
|
75
|
74.4
|
|
CM4 – Tin Hau Temple, Cha Kwo Ling
|
N3101a
|
73
|
65.0
|
|
CM5 – CCC Kei Faat Primary School, Yau Tong
|
N4101
|
71
|
70.2
|
3.15
The result at CM1 and CM2 were
higher than the maximum predicted mitigated construction noise level in the EIA
Report, AEIAR-173/2013 (as approved in 2013), that may due to the fluctuation
of road traffic near Eastern Cross Harbour Tunnel Toll Plaza and the
non-project related construction activities. However, the results at CM3,
CM4and CM5 were lower than the maximum predicted mitigated construction noise
level in the EIA Report, AEIAR-173/2013 (as approved in 2013). One (1) Limit
level exceedance was recorded in the reporting period. Detail of exceedance is
presented in Appendix N.
4
Water quality
Groundwater Quality
4.1
The existing groundwater
quality monitoring programme has been suspended as the monitoring results had
been deemed non-representative of the impact from the project justified by two
major factors: (1) influence on the monitoring results from non-project related
factors, such as anthropogenic activities and natural phenomenon; and (2) large
separation between the monitoring stations and works area. In addition, as no
alternative locations for the groundwater quality monitoring were available,
the groundwater quality monitoring has been suspended since October 2019 upon
the agreement by EPD.
Marine Water Quality
4.2
According to Section 4.4.3 of EM&A Manual (AEIAR-173/2013), marine water quality impact monitoring stations is
carried out during marine construction for TKOLTT reclamation. Since the
construction of Cha Kwo Ling Tunnel from the end of
Trunk Road T2 to the TKOLTT at the Eastern Ventilation Building does not
involve reclamation, the marine water quality monitoring programme
stated in Section 4.4 of the EM&A Manual (AEIAR-173/2013) is therefore not applicable to Contract No. ED/2018/04.
Groundwater Level Monitoring (Piezometer Monitoring)
4.3
According to Section 4.1.2 of EM&A Manual (AEIAR-173/2013), daily piezometer monitoring will be carried out on a
daily basis when any tunnel construction activities are carried out within +/-
50m of the piezometer gate in plan. As the construction works of Cha Kwo Ling Tunnel from the end of Trunk Road T2 to the TKOLTT
at the Eastern Ventilation Building is approximately 120m away from the piezometer gate in plan, the piezometer monitoring programme
stated in Section 4.2 of the EM&A Manual (AEIAR-173/2013) is therefore not applicable to Contract No. ED/2018/04.
5.1
According to Section 5.1.2 of the EM&A Manual (AEIAR-173/2013), Waste materials generated
during construction activities, such as construction and demolition (C&D)
materials and general refuse, are recommended to be audited at regular
intervals (at least quarterly) to ensure that proper storage, transportation
and disposal practices are being implemented by the Contractor. To fulfil this
requirement, site audits are carried out on a weekly basis. The summaries of
site audits are attached in Appendix I.
5.2
With reference to relevant
handling records of this Project, the quantities of different types of waste
generated in the reporting month are summarised and presented in Appendix H.
Post-Translocation Coral Monitoring
6.1
Post-translocation monitoring
survey is recommended in Section 6.2.5 of the EM&A Manual (AEIAR-173/2013), to audit the success of coral
translocation. Since the construction of Cha Kwo Ling Tunnel from the end of Trunk Road T2 to the TKOLTT
at the Eastern Ventilation Building does not involve any marine works in the concerned area
mentioned in Section 6.1.2 of the EM&A Manual (AEIAR-173/2013), the post-translocation
monitoring survey stated in Section 6.2.5 of the EM&A Manual (AEIAR-173/2013) is therefore not applicable to Contract No. ED/2018/04.
7
fisheries
7.1
According to Section 7.1.3 of EM&A Manual (AEIAR-173/2013), no specific fisheries
monitoring programme is required during the construction phase.
7.2
The implementation of the
mitigation measures stated in the Water Quality Impact Assessment (Refer to
Section 5 of EIA Report (AEIAR-173/2013)) will be audited as part of the EM&A procedures during the
construction period. The summaries of site audits are attached in Appendix I.
8.1
According to Condition 3.7 of EP-458/2013/C and
Section 8.2.1 of the EM&A
Manual (AEIAR-173/2013), monitoring of vibration
impacts was conducted when the construction works are less than 100m from the
Built Heritage in close proximity of the worksite, namely the Cha Kwo Ling Tin Hau temple. Tilting
and settlement monitoring should be applied on the Cha Kwo
Ling Tin Hau Temple.
8.2
As
the construction works of Cha Kwo
Ling Tunnel from the end of Trunk Road T2 to the TKOLTT at the Eastern
Ventilation Building are located more than 100m away from the Cha Kwo Ling Tin Hau temple, the
vibration impact monitoring stated in Section 8.3.1 of the EM&A Manual (AEIAR-173/2013) is not applicable
to Contract No. ED/2018/04.
Mitigation Measures for
Cultural Heritage
8.3
According to Condition 3.6 of EP-458/2013/C, to prevent damage to Cha Kwo Ling Tin Hau Temple and its Fung Shui rocks (Child-given rocks)
during the construction phase, a temporarily fenced-off buffer zone (Rocks buffer zone is 5 m from the
edge of Rocks and 15m from the edge of Rocks alter) with allowance for public
access (minimum 1 m) around the temple and the Fung
Shui rocks
shall be provided. The open yard in front of the
temple should be kept as usual for annual Tin Hau
festival.
8.4
As there is a large buffer
distance from the current works to Cha Kwo Ling Tin Hau
Temple and the Fung Shui rocks (Child-given rocks), the
temporarily fenced-off rocks buffer zone and from the edge of Rocks alter is not required. The fenced-off rocks buffer zone would be
implemented when there is construction activities in vicinity of the cultural
heritage.
9.1
According to Section 9.3 of the
EM&A Manual (AEIAR-173/2013), landscape and visual mitigation measures
during the construction phase shall be checked to ensure that they are fully
realized and implemented on site.
9.2
Site audits were carried out on a weekly basis to monitor and audit the timely
implementation of landscape and visual mitigation measures listed in “Environmental Mitigation Implementation Schedule (EMIS)” (shown in Appendix J).
9.3
The implementation of landscape and visual mitigation measures was checked by a registered
landscape architect. No non-compliance of the landscape and visual impact was
recorded in the reporting month. Details of the audit findings and
implementation status are presented in Appendix
I.
10.1 In accordance with Section 10.1.1
of the EM&A Manual (AEIAR-173/2013), monitoring of landfill gas is required for construction works within
the Sai Tso Wan Landfill Consultation Zone during the construction phase. Since no excavation activity for this Project was carried out
within the Sai Tso Wan Landfill Consultation Zone in the reporting month, no
landfill gas monitoring is required.
11.1
According to Section 11.1.1 of
EM&A Manual (AEIAR-173/2013), as no overnight storage of explosive on site
is required for the construction of the Project, the hazard assessment is
deemed not necessary. Thus, environmental monitoring and audit is not required.
12
ENVIRONmental audit
12.1
Site audits were carried out on
a weekly basis to monitor the timely implementation of proper environmental
management practices and mitigation measures in the Project site. The summaries of site audits are
attached in Appendix I.
12.2
Site audits were conducted on
05, 12, 19 and 26 May 2022 in the reporting month. Site inspection of the IEC
was conducted on 26 May 2022. No non-compliance was observed during the site
audit.
12.3
According to Environmental
Permits, the approved EIA Reports (Register No.: AEIAR-174/2013 and
AEIAR-173/2013), and the EM&A Manuals of the Project (AEIAR-174/2013
and AEIAR-173/2013), the mitigation measures detailed
in the documents are recommended to be implemented during the construction
phase. An Environmental Mitigation
Implementation Schedule (EMIS) is provided in Appendix J.
12.4
The ET weekly site inspections
were carried out during the reporting month and the observations and
recommendations are summarized in Table
12.1. Refer to Appendix I for
the site inspection summary reports in the reporting month.
Table
12.1 Observations and
Recommendations of Site Audit
|
Parameters
|
Date
|
Observations and Recommendations
|
Follow-up
|
|
Air Quality
|
N/A
|
There was no observation in the
reporting period.
|
N/A
|
|
Noise
|
N/A
|
There was no observation in the
reporting period.
|
N/A
|
|
Water Quality
|
26 May 2022
|
Stagnant muddy water was
observed.
|
Follow-up on the next reporting
period.
|
|
Ecology
|
N/A
|
There was no observation in the
reporting period.
|
N/A
|
|
Landscape and Visual
|
N/A
|
There was no observation in the
reporting period.
|
N/A
|
|
Waste / Chemical Management
|
12 May 2022
|
Drip tray should be provided to prevent
leaked oil from entering drainage system during handling of chemical.
|
Chemical was removed.
|
|
Permits /Licences
|
N/A
|
There was no observation in the
reporting period.
|
N/A
|
12.5
The Event and Action Plans for
air quality and construction noise monitoring, and the Limit Levels and Action
Plan for landfill gas monitoring are presented in Appendix L.
Air Quality Monitoring
·
No Action/Limit Level
exceedance for 1-hour TSP monitoring was recorded.
·
No Action/ Limit Level
exceedance for 24-hour TSP monitoring was recorded.
Construction Noise
Monitoring
·
No Action Level exceedance was
recorded due to the documented complaint in the reporting month.
·
One (1) Limit Level exceedance for
construction noise monitoring was recorded in the reporting month.
13.1
The summaries of environmental
complaint, warning, summon and notification of successful prosecution for the
Project is presented in Appendix M.
13.2
The summary of exceedance
record in the reporting month is shown in Appendix
N.
14.1
Tentative construction
programmes for the next three months are provided in Appendix O.
14.2
Major site activities
undertaken for the coming months are summarized as follows:
•
West bound – Kicker concreting
•
East bound – Type C Service
Gallery Installation
•
Branch Tunnel – Kicker
concreting
•
East Ventilation Building –
Excavation, Blinding & Waterproofing
•
Drill & Blast Tunnel - CP33
blasts
14.3
Key environmental issues in the
coming months include:
•
Make sure noise mitigation
measures are implemented accordingly;
•
Make sure drainage system is
adequately designed to prevent flooding during periods of heavy rain; and,
•
Make sure mitigation measure
for dust suppression are implemented on site.
14.4
The tentative environmental
monitoring schedule for the next month is shown in Appendix D.
14.5
This is the 25th Monthly EM&A Report which presents the EM&A works undertaken
during the reporting month in accordance with the EM&A Manual (AEIAR-173/2013) and the requirement under EP.
Air Quality Monitoring
14.6
No Action/Limit Level exceedance was recorded for 1-hour TSP monitoring
in the reporting month.
14.7
No Action/ Limit Level exceedance was recorded for 24-hour TSP monitoring in the reporting month.
Construction Noise Monitoring
14.8
No Action Level exceedance was recorded due to
documented complaint in the reporting month.
14.9
One (1) Limit Level exceedance for construction
noise monitoring was recorded in the reporting month.
Site Audit
14.10 4 ET joint weekly environmental site inspections were
conducted in the reporting month.
Complaint, Notification of Summons and Successful Prosecution
14.11 No environmental complaint was received in the
reporting period. No notifications of summons and successful prosecutions were
received in the reporting month.
14.12 According
to the environmental audit performed in the reporting month, the following
recommendations were made:
Water Quality
·
Pounding water should be avoided.
Waste Management
·
Drip tray should be provided
to prevent leaked oil from entering drainage system during handling of chemical.
