EXECUTIVE
SUMMARY
1.
This is the 35th
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 March 2023.
2. The main works undertaken during the
reporting period are as follows:
·
East Bound – RC Structure
Construction, Service Gallery Drill & Blast, Pre-tunnel, Civil work
preparation for TBM pilot.
·
East Ventilation Building – WB
Blinding & Waterproofing, RC Structure.
·
West Bound – Extension &
Blast Tunnel, RC Structure Construction, Pre-tunnel.
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
|
2
|
3
|
0
|
0
|
N/A
|
|
Noise
|
0
|
0
|
0
|
0
|
N/A
|
|
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. Two (2) Action Level exceedance and Three (3) Limit Level exceedance was recorded for 24-hour TSP monitoring in the
reporting month.
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.
No 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
|
|
-
|
-
|
-
|
Reporting Changes
23. No reporting change is recorded in the
reporting months.
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 (April 2023)
|
Key Environmental Issues
|
|
|
|
1.
East Bound – RC Structure
Construction, Service Gallery Drill & Blast, Pre-tunnel, Civil work
preparation for TBM pilot.
2. East
Ventilation Building – WB Blinding & Waterproofing, RC Structure.
3. West
Bound – Extension & Blast Tunnel, RC Structure Construction.
|
(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 35th Monthly
EM&A Report which summarises the impact monitoring results and
audit findings for the EM&A programme during the
reporting period in March 2023.
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
|
Mr. Marcus Cheung
|
6628 2685
|
|
|
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 Bound – RC Structure
Construction, Service Gallery Drill & Blast, Pre-tunnel.
·
East Ventilation Building – WB
Blinding & Waterproofing and RC Structure.
·
West Bound – Extension &
Blast Tunnel, RC Structure Construction.
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 March 2023.
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-RE0919-22
|
23 Sep 2022
|
23 Mar 2023
|
Expired on 23 Mar 2023
|
|
CNP No. (For Portion T1): GW-RE0187-23
|
24 Feb 2023
|
23 Apr 2023
|
Valid
|
|
CNP No. (For
TBM Transportation): GW-RE0254-23
|
16 Mar 2023
|
28 Apr 2023
|
Valid
|
|
CNP No. (For Portion Q): GW-RE0282-23
|
22 Mar 2023
|
21 Sep 2023
|
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
|
1
2
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(B)(2) (*)(**)
|
Flat
103 Cha Kwo Ling Village
|
Ground Level
|
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)
(**) AM4(A) is not available for conducing
monitoring due to the demolition of administrative office.
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(B)
|
24-hour TSP
|
24 hours
|
Once every 6
days
|
|
|
Monitoring
Equipment
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, 972777, 972778, 972779, 972780, 8Y2373, 8Y2374)
Sibata
Model No. LD-3B
(Serial No.2Y6194)
|
8
|
|
HVS Sampler
|
GMW model: GS2310
(Serial No.: 1287, 10379, 10599)
|
3
|
|
TE 5170 (Serial No.: 1956)
|
1
|
|
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 and
AM4 are completed by the ET of Agreement No. CE 59/2015
(EP), and the data will
be adopted in this report. As the proposal for
relocation approved, the monitoring at AM4(A) will conducted
at AM4(B). For the time being, as the station CKL2 for the 24 hr TSP
monitoring, carried out under EM&A works for Trunk Road T2 Project (EP-
451/2013), is located in close proximity to AM4(B); the results from CKL2 are
adopted as reference for the 24 TSP monitoring at AM4(B), which has similar
environment when compared with that for CKL2. The location of monitoring
station CKL2 is shown in Figure 2.
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
Two (2) Action Level exceedance
was recorded for 24-hour TSP monitoring in the reporting month and Three (3)
Limit Level exceedance was 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 (i.e underground utility work in TKOLTT project)
|
|
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 (i.e road paving work in TKOLTT project)
|
|
AM4 - Sitting-out Area at Cha Kwo Ling Village
|
Road Traffic
at Cha Kwo Ling Road
|
|
AM4(B)
(**) - Flat 103 Cha Kwo Ling
Village
|
Road Traffic
at Cha Kwo Ling Road(*)
|
|
(*): Field observation observed at CKL2 during
monitoring is presented. Detail refer to S2.13.
(**) AM4(A) is not available for conducing monitoring
due to the demolition of administrative office.
|
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
(March 2023),
μg/m3
|
|
AM1 – Tin Hau Temple
|
CL1
|
707
|
90.0
|
|
AM2 – Sai Tso Wan
Recreation Ground
|
CL6
|
266
|
136.8
|
|
AM3 – Yau
Lai Estate Bik Lai House
|
CL9
|
507
|
122.0
|
|
AM4 - Sitting-out Area at
Cha Kwo Ling Village
|
CL16
|
430
|
229.9
|
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
(March 2023),
μg/m3
|
|
AM1 – Tin Hau Temple
|
CL1
|
199
|
149.1
|
|
AM2 – Sai Tso Wan
Recreation Ground
|
CL6
|
109
|
83.9
|
|
AM3 – Yau
Lai Estate Bik Lai House
|
CL9
|
123
|
49.4
|
|
AM4(B) – Flat 103 Cha Kwo Ling Village (*)
|
N/A(1)
|
N/A(1)
|
383.1(**)
|
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 (B) (24-hr TSP only)
(**): Monitoring results at CKL2 is
presented. Detail refer to S2.13
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). Two (2) Action Level exceedance was recorded for 24-hour TSP
monitoring in the reporting month and Three (3) Limit Level exceedance was
recorded for 24-hour TSP monitoring in the reporting month.
Monitoring Requirements
4
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
|
BSWA 308 (Serial No.: 580287,580156)
SWAN 957 (Serial No.:
23851, 27189)
|
4
|
|
Calibrator
|
ST-120 (Serial No.: 181001637)
|
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
No Limit Level exceedance was
recorded for day-time construction noise monitoring in the reporting month.
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 (i.e road paving work in
TKOLTT project)
|
|
CM2
|
Road Traffic near Eastern Cross Harbour
Tunnel Toll Plaza, non-project related construction activities (i.e road paving work in TKOLTT project)
|
|
CM3
|
Road Traffic near Eastern Cross Harbour
Tunnel Toll Plaza non-project related construction activities (i.e road paving work in TKOLTT project)
|
|
CM4
|
Road
Traffic at Cha Kwo Ling Road, non-project related
construction activities (i.e underground utility
work in TKOLTT project)
|
|
CM5
|
Road
Traffic near Eastern Cross Harbour Tunnel Toll
Plaza,
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
(March 2023),
Leq (30min) dB(A)
|
|
CM1 – Nga Lai House, Yau
Lai Estate Phase 1, Yau Tong
|
N1102
|
73
|
70.3
|
|
CM2 – Bik Lai House, Yau
Lai Estate Phase 1, Yau Tong
|
N1204
|
75
|
70.9
|
|
CM3 – Block S, Yau Lai
Estate Phase 5, Yau Tong
|
N2105
|
75
|
70.2
|
|
CM4 – Tin Hau Temple,
Cha Kwo Ling
|
N3101a
|
73
|
71.1
|
|
CM5 – CCC Kei Faat
Primary School, Yau Tong
|
N4101
|
71
|
70.3
|
3.15
The results at CM1, CM2, CM3, CM4
and CM5 were lower than the maximum predicted mitigated construction noise
level in the EIA Report, AEIAR-173/2013 (as approved in 2013). No Limit
level exceedance was recorded in the reporting period.
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 02,
09, 16, 23 & 30 March 2023 in the reporting month.
Site inspection of the IEC was conducted on 02 March 2023. 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
|
23 Feb 2023
|
|
The contractor has replaced
the new NRMM label.
|
|
2 Mar 2023
|
|
The Contractor has replaced the NRMM label with
the new one.
|
|
23 Mar 2023
|
|
The Contractor has removed the cement bag.
|
|
Noise
|
N/A
|
|
N/A
|
|
Water Quality
|
N/A
|
|
N/A
|
|
Ecology
|
N/A
|
|
N/A
|
|
Landscape and Visual
|
N/A
|
There was no observation
in the reporting period.
|
N/A
|
|
Waste/
Chemical Management
|
2
Mar 2023
|
Oil leakage was
observed on the floor near the entrance of tunnel.
|
The Contractor has removed the leakage oil.
|
|
23 Mar 2023
|
Drip tray should be
provided for chemical container to prevent chemical leakage.
|
The Contractor has removed the chemical container.
|
|
|
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 in the reporting month.
·
Two (2) Action Level exceedance
for 24-hour TSP monitoring was recorded in the reporting month and Three (3)
Limit Level exceedance for 24-hour TSP monitoring was recorded in the reporting
month.
Construction Noise Monitoring
·
No Action Level exceedance was
recorded due to the documented complaint in the reporting month.
·
No 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:
·
East Bound – RC Structure
Construction, Service Gallery, Drill & Blast. Pre-tunnel, Civil work
preparation for TBM pilot.
·
East Ventilation Building – WB
Blinding & Waterproofing, RC Structure
·
West Bound – Extension &
Blast Tunnel, RC Structure Construction
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
Monitoring Schedule
14.4
The tentative environmental
monitoring schedule for the next month is shown in Appendix D.
15.1
This is the 35th 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
15.2
No Action/Limit Level exceedance was recorded for 1-hour TSP monitoring
in the reporting month.
15.3
Two (2) Action Level exceedance for 24-hour TSP monitoring was recorded
in the reporting month and Three (3) Limit Level exceedance for 24-hour TSP
monitoring was recorded in the reporting month.
Construction Noise Monitoring
15.4
No Action Level exceedance was
recorded due to documented complaint in the reporting month.
15.5
No Limit Level exceedance for construction noise
monitoring was recorded in the reporting month.
Site Audit
15.6
5 ET joint weekly environmental site
inspections were conducted in the reporting month.
Complaint, Notification of Summons and Successful Prosecution
15.7
No environmental complaint was
received in the reporting period. No notifications of summons and successful prosecutions
were received in the reporting month.
15.8
According to the environmental
audit performed in the reporting month, the following recommendations were
made:
Air quality:
·
The valid NRMM labels should be displayed at
a conspicuous position on the PME.
·
The dusty material (i.e
cement bag) should be covered with impervious sheet when not in used.
Waste /
Chemical Management:
·
Regular
maintenance and check the machinery to prevent the leakage of oil.
·
Drip
Tray should be provided for chemical containers to prevent chemical leakage.
