EXECUTIVE
SUMMARY
1.
This is the 30th
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 October 2022.
2. The main works undertaken during the
reporting period are as follows:
·
East Bound – RC Structure
Construction, Service Gallery Drill & Blast, Service Gallery A
Installation.
·
East Ventilation Building – WB
Blinding & Waterproofing, EB Excavation and RC Structure.
·
West Bound – Extension &
Blast Tunnel, RC Structure Construction.
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
|
2
|
0
|
0
|
0
|
Detail refer to App.
M
|
|
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
was recorded for 24-hour TSP monitoring in the reporting month.
Construction Noise
Monitoring
8.
Two (2) 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
|
2
|
Noise
|
Detail refer to App
M
|
Closed
|
|
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
|
|
Noise nuisance
generated from the
construction activities
at Portion T1.
(8-14 October 2022)
|
According to the investigation
result, the construction
activities of Trunk Road T2
conducted inside the tunnel
area and the construction
activities of TKO-LT Tunnel
conducted inside the tunnel
section at Kwun Tong Side are
considered as one of the
potential noise source of the
ground borne noise nuisance
|
·
A valid CNP was hold and
construction activities being taken were complied with the relevant CNP
·
Blast door was fully
enclosed when construction activities were carried out within tunnel area to
prevent, reduce or minimize the emission of airborne noise
·
In addition, the
Contractor should still maintain good site practices, such as schedule noisy
work to the less sensitive hours and provide regularly maintenance for PMEs.
·
Contractor is recommended
to continue to strictly follow the requirements in the relevant CNP and the
approved CNMP.
·
According to the
condition 3.d point 5 of the CNP (GW-RE0997-22), the immediate remedial
action shall be implemented in case adverse ground-borne noise impact on any
noise sensitive receiver is received
|
|
Noise nuisance
generated from the
construction activities
at Portion T1.
(17-23 October 2022)
|
According to the investigation
result, the construction
activities of Trunk Road T2
conducted inside the tunnel
area and the construction
activities of TKO-LT Tunnel
conducted inside the tunnel
section at Kwun Tong Side are
considered as one of the
potential noise source of the
ground borne noise nuisance
|
·
A valid CNP was hold and
construction activities being taken were complied with the relevant CNP
·
Blast door was fully
enclosed when construction activities were carried out within tunnel area to
prevent, reduce or minimize the emission of airborne noise
·
In addition, the
Contractor should still maintain good site practices, such as schedule noisy
work to the less sensitive hours and provide regularly maintenance for PMEs.
·
Contractor is recommended
to continue to strictly follow the requirements in the relevant CNP and the
approved CNMP.
·
According to the
condition 3.d point 5 of the CNP (GW-RE0997-22), the immediate remedial
action shall be implemented in case adverse ground-borne noise impact on any
noise sensitive receiver is received
|
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 (November 2022)
|
Key
Environmental Issues
|
|
|
|
1. East
Bound – RC Structure Construction, Service Gallery Frill & Blast. Service
Gallery A Installation
2. East
Ventilation Building – WB Blinding & Waterproofing, EB Excavation, 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 30th Monthly EM&A Report which summarises the impact
monitoring results and audit findings for the EM&A programme during the
reporting period in October 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 Bound – RC Structure
Construction, Service Gallery Drill & Blast, Service Gallery A
Installation.
·
East Ventilation Building – WB
Blinding & Waterproofing, EB Excavation 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 October 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 T1): GW-RE0622-22
|
07 Jul 2022
|
06 Oct 2022
|
Expired on 6 Oct 2022
|
|
CNP No. (For Portion Q): GW-RE0919-22
|
23 Sep 2022
|
23 Mar 2023
|
Valid
|
|
CNP No. (For Portion T1): GW-RE0997-22
|
6 Oct 2022
|
23 Dec 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(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, 972778, 972779, 972780, 8Y2374)
Sibata Model No. LD-3B
(Serial No.2Y6194)
|
6
|
|
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
No Action/ 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
|
|
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(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
(October 2022),
μg/m3
|
|
AM1 – Tin Hau Temple
|
CL1
|
707
|
112.7
|
|
AM2 – Sai Tso Wan
Recreation Ground
|
CL6
|
266
|
228.9
|
|
AM3 – Yau Lai Estate Bik
Lai House
|
CL9
|
507
|
85.0
|
|
AM4 - Sitting-out Area at
Cha Kwo Ling Village
|
CL16
|
430
|
95.0
|
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
(October 2022),
μg/m3
|
|
AM1 – Tin Hau Temple
|
CL1
|
199
|
145.7
|
|
AM2 – Sai Tso Wan
Recreation Ground
|
CL6
|
109
|
107.8
|
|
AM3 – Yau Lai Estate Bik
Lai House
|
CL9
|
123
|
34.3
|
|
AM4(B) – Flat 103 Cha Kwo
Ling Village (*)
|
N/A(1)
|
N/A(1)
|
206.1
(**)
|
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). No
Action / Limit Level exceedance was recorded for 24-hour TSP monitoring in the
reporting month.
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)
BSWA 308 (Serial No.: 570183)
|
3
|
|
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
Two (2) 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
|
|
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
(October 2022),
Leq (30min) dB(A)
|
|
CM1 – Nga Lai
House, Yau Lai Estate Phase 1, Yau Tong
|
N1102
|
73
|
75.3
|
|
CM2 – Bik Lai
House, Yau Lai Estate Phase 1, Yau Tong
|
N1204
|
75
|
73.8
|
|
CM3 – Block S,
Yau Lai Estate Phase 5, Yau Tong
|
N2105
|
75
|
71.8
|
|
CM4 – Tin Hau
Temple, Cha Kwo Ling
|
N3101a
|
73
|
72.7
|
|
CM5 – CCC Kei
Faat Primary School, Yau Tong
|
N4101
|
71
|
68.8
|
3.15 The results at 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). However, the result at CM1 was higher
than the maximum predicted mitigated concentration noise level in the EIA
Report, AEIAR-173/2013 (as approved in 2013), which may due to the traffic activity
along the Lei Yue Mun Road and the Kwun Tong Bypass (Toll road). 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
06, 13, 20 and 27 October 2022 in the reporting month. Site inspection of the
IEC was conducted on 20 October 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
|
20
Oct 2022
|
|
The contractor has replaced the new NRMM label.
|
|
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
|
29
Sep 2022
|
Drip tray which prevent the leaked oil from
entering drainage was not observed.
|
The
oil container was removed to avoid the oil leakage.
|
|
29
Sep 2022
|
The accumulated waste was found in the bin.
|
The contractor had removed the accumulated waste
|
|
6
Oct 2022
|
Drip tray which prevent the leaked oil from
entering drainage was not observed.
|
The contractor removed the oil container to avoid
oil leakage.
|
|
20
Oct 2022
|
The waste oil was
observed on the floor.
|
The contractor has cleaned the waste oil on the
floor.
|
|
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 in the reporting month.
·
No Action/Limit Level
exceedance for 24-hour TSP monitoring was recorded in the reporting month.
Construction Noise
Monitoring
·
Two (2) 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 Frill & Blast, Service Gallery A
Installation.
·
East Ventilation Building – WB
Blinding & Waterproofing, EB Excavation, 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.
14.4
The tentative environmental
monitoring schedule for the next month is shown in Appendix D.
14.5
This is the 30th 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 for 24-hour TSP monitoring was recorded in the reporting month.
Construction Noise Monitoring
14.8
Two (2) Action Level exceedance
was recorded due to documented complaint in the reporting month.
14.9
No 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 Two (2) 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:
Air quality:
·
The valid NRMM labels should
be displayed at a conspicuous position on PME.
Waste / Chemical Management
·
The general refuse should
be stored in the enclosed bin and removed regularly.
·
Drip tray should be
provided to prevent leaked oil from entering drainage system during handling of
chemical.
·
Waste, such as oil, should
be handled and stored well to ensure secure containment, thus minimizing the
potential of pollution.
