EXECUTIVE SUMMARY
1.
This is the 10th
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 February 2021.
2. The main works undertaken during the
reporting period are as follows:
·
West Bound – Drill & Break
Tunnel
·
East Bound – Drill & Blast
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
|
0
|
0
|
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)
|
0
|
N/A(1)
|
0
|
N/A
|
|
Note: (1): No Action
Level for Landfill Gas Monitoring.
|
Air Quality Monitoring
6.
No Action/Limit Level
exceedance for 1-hour TSP monitoring was recorded.
7.
No Action/Limit Level
exceedance for 24-hour TSP monitoring was recorded.
Construction Noise
Monitoring
8.
No Action Level exceedance was recorded
in this reporting month.
9.
No Limit Level exceedance for
day time construction noise monitoring were recorded in the reporting month.
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. Such
monitoring was conducted by the Contractor of Agreement No. CE 59/2015 (EP). No Limit Level exceedance was
recorded in this reporting month.
Hazard to Life Monitoring
19. No environmental monitoring and audit is required as no hazard
assessment was conducted.
Environmental Site Inspection
19. 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.
20. 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
|
1
|
Noise
|
Details refer to App M
|
On-going
|
|
Notifications of any
summons & prosecutions received
|
0
|
--
|
N/A
|
N/A
|
21. 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
|
|
Ground
borne noise nuisance from the construction activities at the evening time
period (About 08:00 p.m.).
|
The
construction activities of Trunk Road T2 conducted inside the eastbound
tunnel area and the construction activities of TKO-LT Tunnel conducted inside
the tunnel section at Kwun Tong Side on the evening time of the date of
complaint are considered as one of the potential noise source of the ground
borne noise nuisance.
|
As
a further complaint was received on 6 March 2021 by EPD and referred to ETL
on 8 March 2021. Therefore, further complaint investigation is on-going.
Contractor
is recommended to continue to strictly follow the requirements in the
relevant CNP.
According
to the condition 3.d point 5 of the CNP (GW-RE0071-21), the immediate
remedial action shall be implemented in case adverse ground-borne noise
impact on any noise sensitive receiver is received.
|
22. No reporting change in the reporting month.
23. 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 (March 2021)
|
Key
Environmental Issues
|
|
|
|
1. West Bound –
Drill & Break Tunnel
2. East Bound –
Dill & Blast Tunnel
|
(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.
|
|
1.1
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 EIAOproposed
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 10th Monthly EM&A Report which summarises the impact monitoring results and audit
findings for the EM&A programme during the reporting period in February
2021.
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
|
Mr. Joe Nam
|
5183 0830
|
|
Cinotech
|
Environmental Team
|
Mr. KS Lee (ETL)
|
2151 2091
|
|
Ms. Karina Chan
|
2157 3880
|
|
Ramboll
|
Independent Environmental Checker
|
Mr. Manson Yeung
|
3465 2888
|
|
BTP
|
Contractor
|
Mr. Bryan Lee
|
5588 3891
|
|
|
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:
·
West Bound – Drill & Break
Tunnel
·
East Bound – Drill & Blast
Tunnel
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 February 2021.
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-RE0071-21
|
28 Jan 2021
|
27 May 2021
|
Valid
|
|
CNP No. (For Portion Q): GW-RE0917-20
|
08 Nov 2020
|
07 May 2021
|
Valid
|
|
Wastewater Discharge License
|
|
WT00036699-2020
|
14 Jan 2021
|
31 Jan 2026
|
Valid
|
|
Chemical Waste Producer License
|
|
WPN: 5213-286-B2557-03
|
09 Mar 2020
|
N/A
|
Valid
|
2.1
According to Section 2.2.4 of
the EM&A Manual (AEIAR-173/2013), 1-hour
and 24-hour Total Suspended Particulates (TSP) monitoring was conducted to
monitor the air quality for this Project. For regular impact monitoring, a
sampling frequency of at least once in every six days at all of the monitoring
stations for 1-hour and 24-hour TSP monitoring. Appendix A shows the
established Action/Limit Levels for the environmental monitoring works.
2.2
Five designated monitoring
stations were selected for air quality monitoring programme. Table 2.1 describes the air quality
monitoring locations, which are also depicted in Figure 2.
Table 2.1 Air Quality Monitoring Locations
|
Monitoring
Stations
|
Location
|
Location of Measurement
|
|
AM1
|
Tin Hau Temple
|
Ground Level
|
|
AM2
|
Sai Tso Wan Recreation Ground
|
Ground Level
|
|
AM3
|
Yau Lai Estate Bik Lai House
|
Rooftop (41/F)
|
|
AM4(1)
|
Sitting-out Area at Cha Kwo Ling
Village
|
Ground Level
|
|
AM4(A)(2) (*)
|
Cha Kwo Ling Public Cargo
Working Area Administrative Office
|
Rooftop (3/F)
|
Remarks:
(1) For 1-hour TSP monitoring;
(2) For 24-hour TSP monitoring
(*) Air quality monitoring at designated
station AM4 (24-hr TSP) was rejected by the premise owners.
Therefore, baseline and impact air quality
monitoring works were carried out at alternative air quality monitoring stations
AM4 (A) (24-hr TSP only)
2.3
Table 2.2 summarizes the monitoring
parameters, monitoring period and frequencies of impact air quality monitoring.
The monitoring schedule is shown in
Appendix D.
Table 2.2 Frequency and Parameters of Air Quality
Monitoring
|
Monitoring
Stations
|
Parameter
|
Period
|
Frequency
|
|
AM1, AM2, AM3, AM4
|
1-hour TSP
|
0700 – 1900
|
3
times per 6 days
|
|
AM1, AM2, AM3, AM4(A)
|
24-hour TSP
|
24 hours
|
Once every 6 days
|
2.4
High Volume Samplers (HVS) in
compliance with the specification stipulated in the EM&A Manual (AEIAR-173/2013),
Section 2.3.1, were used to carry out 24-hour TSP monitoring. Direct reading
dust meter were also used to measure 1-hour average TSP levels. The 1-hour
sampling was determined by HVS to check the validity and accuracy of the
results measured by direct reading method.
2.5
Wind data monitoring equipment
was set at rooftop (about 41/F) of Yau Lai Estate Bik Lai House for logging
wind speed and wind direction such that the wind sensors are clear of
obstructions or turbulence caused by building. The wind data monitoring
equipment is re-calibrated at least once every six months and the wind
directions are divided into 16 sectors of 22.5 degrees each. The location is
shown in Figure 2. This weather
information for the reporting month is summarized in Appendix C.
2.6
Table 2.3 summarizes the equipment used
for air quality monitoring by the ET for Contract No. CE 59/2015 (EP). Copies
of calibration certificates are attached in Appendix B.
Table
2.3 Air Quality Monitoring
Equipment
|
Equipment
|
Model
|
Quantity
|
|
1-hour TSP Dust
Meter
|
Sibata Model No. LD-5R
(Serial No.: 8Y2373, 8Y2374, 972781, 972780, 972778,972779)
|
6
|
|
HVS Sampler
|
TISCH Model: TE-5170 (Serial No.: 1536)
|
1
|
|
GMW model: GS2310
(Serial No.: 1287, 10379, 10599)
|
3
|
|
Calibrator
|
TISCH Model: TE-5025A
(Serial No.: 3864, 3746)
|
2
|
|
Wind Anemometer
|
Davis Weather
Monitor II, Model no. 7440
(Serial No.:
MC01010A44)
|
1
|
1-hour TSP Monitoring
Measuring Procedures
2.7
The measuring procedures of the 1-hour dust
meter are in accordance with the Manufacturer’s Instruction Manual as follows:
(Sibata Model No.: LD-5R)
·
The 1-hour dust meter is placed
at least 1.3 meters above ground.
·
Set POWER to “ON” and make sure
that the battery level was not flash or in low level.
·
Allow the instrument to stand
for about 3 minutes and then the cap of the air sampling inlet has been
released.
·
Push the knob at MEASURE position.
·
Set time/mode setting to [BG]
by pushing the time setting switch.
Then, start the background measurement by pushing the start/stop switch
once. It will take 6 sec. to complete the
background measurement.
·
Push the time setting switch to
change the time setting display to [MANUAL] at the bottom left of the liquid
crystal display. Finally, push the start/stop switch to stop the measuring
after 1 hour sampling.
·
Information such as sampling
date, time, count value and site condition were recorded during the monitoring
period.
Maintenance/Calibration
2.8
The following maintenance/calibration is required for the 1-hour dust meter:
·
Check and calibrate the meter
by HVS to check the validity and accuracy of the results measured by direct
reading method at 2-month intervals throughout all stages of the air quality
monitoring.
24-hour TSP Monitoring
Instrumentation
2.9
High volume samplers (HVS) (TISCH Model: TE-5170 and GMW Model: GS2310)
completed with appropriate sampling inlets were employed for 24-hour TSP monitoring. The sampler was composed of a motor, a filter
holder, a flow controller and a sampling inlet and its performance
specification complied with that required by USEPA Standard Title 40, Code of
Federation Regulations Chapter 1 (Part 50).
2.10
The positioning of the HVS
samplers are as follows:
·
A
horizontal platform with appropriate support to secure the samplers against
gusty wind shall be provided;
·
No
two samplers shall be placed less than 2 meter apart;
·
The
distance between the sampler and an obstacle, such as buildings, must be at
least twice the height that the obstacle protrudes above the sampler;
·
A
minimum of 2 metres of separation from walls, parapets and penthouses is
required for rooftop samplers;
·
A
minimum of 2 metres of separation from any supporting structure, measured
horizontally is required;
·
No
furnace or incinerator flue is nearby;
·
Airflow
around the sampler is unrestricted;
·
The
sampler is more than 20 metres from the dripline;
·
Any
wire fence and gate, to protect the sampler, shall not cause any obstruction
during monitoring;
·
Permission
must be obtained to set up the samplers and to obtain access to the monitoring
stations; and
·
A
secured supply of electricity is needed to operate the samplers.
Operating/analytical
procedures for the operation of HVS
2.11
Operating/analytical procedures
for the air quality monitoring are highlighted as follows:
·
Prior to the commencement of
the dust sampling, the flow rate of the high volume sampler was properly set (between 0.6 m3/min.
and 1.7 m3/min.) in accordance with the EM&A manual (AEIAR-173/2013). The flow rate shall be indicated on the
flow rate chart.
·
For
TSP sampling, fiberglass filters with a collection efficiency of > 99% for
particles of 0.3μm diameter were used.
·
The
power supply was checked to ensure the sampler worked properly. On sampling, the sampler was operated for 5
minutes to establish thermal equilibrium before placing any filter media at the
designated air monitoring station.
·
The
filter holding frame was then removed by loosening the four nuts and a weighted
and conditioned filter was carefully centered with the stamped number upwards,
on a supporting screen.
·
The
filter was aligned on the screen so that the gasket formed an airtight seal on
the outer edges of the filter. Then the
filter holding frame was tightened to the filter holder with swing bolts. The
applied pressure should be sufficient to avoid air leakage at the edges.
·
The
shelter lid was closed and secured with the aluminum strip.
·
The
timer was then programmed. Information
was recorded on the record sheet, which included the starting time, the weather
condition and the filter number (the initial weight of the filter paper can be
found out by using the filter number).
·
After
sampling, the filter was removed and sent to the HOKLAS laboratory (ALS
Technichem (HK) Pty Ltd.) for weighing.
The elapsed time was also recorded.
·
Before
weighing, all filters were equilibrated in a conditioning environment for 24
hours. The conditioning environment temperature should be between 25°C and 30°C
and not vary by more than ±3°C; the relative humidity (RH) should be < 50%
and not vary by more than ±5%. A convenient working RH
is 40%.
Maintenance/Calibration
2.12
The following maintenance/calibration is required for the HVS:
·
The
high volume motors and their accessories were properly maintained. Appropriate
maintenance such as routine motor brushes replacement and electrical wiring
checking were made to ensure that the equipment and necessary power supply are
in good working condition.
High volume samplers were
calibrated at bi-monthly intervals using TE-5025A Calibration Kit
throughout all stages of the air quality monitoring.
2.13
The impact
monitoring works for air quality monitoring locations AM1, AM2, AM3, AM4 and
AM4 (A) are completed by the ET of Agreement No. CE
59/2015 (EP), and the data will be
adopted in this report.
2.14
As the HVS at AM2was
broken-down during the first week of February 2021, thus, the 24-hour TSP monitoring at such
station was temporary suspended during the aforementioned period. The monitoring schedule is shown in Appendix D.
2.15
No Action/Limit Level
exceedance was recorded for all 1-hour and 24-hour TSP monitoring in the
reporting month.
2.16
The monitoring data and
graphical presentations of 1-hour and 24-hour TSP monitoring results are shown
in Appendix E and Appendix F respectively.
2.17
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
|
|
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
|
|
AM4 - Sitting-out Area at Cha Kwo Ling Village
|
Road Traffic
at Cha Kwo Ling Road
|
|
AM4(A) - Cha Kwo Ling Public Cargo Working Area Administrative
Office
|
Road Traffic
at Cha Kwo Ling Road
|
Comparison
of EM&A Result with EIA Prediction
2.18
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
(February 2021),
μg/m3
|
|
AM1 – Tin Hau Temple
|
CL1
|
707
|
197.5
|
|
AM2 – Sai Tso Wan
Recreation Ground
|
CL6
|
266
|
81.9
|
|
AM3 – Yau Lai Estate Bik
Lai House
|
CL9
|
507
|
104.0
|
|
AM4 - Sitting-out Area at
Cha Kwo Ling Village
|
CL16
|
430
|
88.0
|
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
(February 2021),
μg/m3
|
|
AM1 – Tin Hau Temple
|
CL1
|
199
|
148.6
|
|
AM2 – Sai Tso Wan
Recreation Ground
|
CL6
|
109
|
42.7
|
|
AM3 – Yau Lai Estate Bik
Lai House
|
CL9
|
123
|
91.4
|
|
AM4(A) - Cha Kwo Ling Public
Cargo Working Area Administrative Office (*)
|
N/A(1)
|
N/A(1)
|
131.6
|
Remarks:
(1)
No 24-hr TSP concentration was predicted in EIA
Report (AEIAR-173/2013)
(*) Air quality monitoring at designated station
AM4 (24-hr TSP) was rejected by the premise owners. Therefore, baseline and
impact air quality monitoring works were carried out at
alternative air quality monitoring stations AM4 (A) (24-hr TSP only)
2.19
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.
2.20
In the reporting month, the
24-hour TSP concentrations at AM1, AM2 and AM3 were lower than the prediction
in the EIA Report, AEIAR-173/2013 (as approved in 2013). No Action/Limit level exceedance was recorded in the reporting
period.
3
noise
Monitoring Requirements
3.1
According to Section 3.2.1 of the EM&A Manual (AEIAR-173/2013), construction noise monitoring was conducted to monitor the
construction noise arising from the construction activities. The regular
monitoring frequency for each monitoring station shall be on a weekly basis and
conduct one set of measurements between 0700 and 1900 hours on normal weekdays.
Appendix A shows the established
Action and Limit Levels for the environmental monitoring works.
Monitoring Locations
3.2
Noise monitoring was conducted
at five designated monitoring stations, namely CM1, CM2, CM3, CM4 and CM5 in
the reporting period. Table 3.1 and Figure 2 show the locations of these
stations.
Table
3.1 Noise Monitoring Stations
|
Monitoring Stations
|
Location
|
Location of Measurement
|
|
CM1
|
Nga Lai House, Yau
Lai Estate Phase 1, Yau Tong
|
Rooftop (41/F)
|
|
CM2
|
Bik Lai House,
Yau Lai Estate Phase 1, Yau Tong
|
Rooftop (41/F)
|
|
CM3
|
Block S, Yau
Lai Estate Phase 5, Yau Tong
|
Rooftop (40/F)
|
|
CM4
|
Tin Hau Temple,
Cha Kwo Ling
|
Ground Level
|
|
CM5
|
CCC Kei Faat Primary
School, Yau Tong
|
Rooftop (6/F)
|
Monitoring
Parameters, Frequency and Duration
3.3
Table 3.2 summarizes the monitoring
parameters, frequency and total duration of monitoring. The noise monitoring schedule is shown in Appendix D.
Table
3.2 Frequency and Parameters of
Noise Monitoring
|
Monitoring Stations
|
Time
Period
|
Duration
|
Frequency
|
Parameter
|
Measurement
|
|
CM1
|
0700-1900 hrs on normal weekdays
|
30 minutes
|
Once per week
|
L10(30
min.) dB(A)
L90(30
min.) dB(A)
Leq(30
min.) dB(A)
|
Façade Measurement
|
|
CM2
|
Façade Measurement
|
|
CM3
|
Façade Measurement
|
|
CM4
|
Façade Measurement
|
|
CM5
|
Façade Measurement
|
Monitoring Equipment
3.4
Integrating Sound Level Meter
was used for impact noise monitoring. The meters were Type 1 sound level meter capable
of giving a continuous readout of the noise level readings including equivalent
continuous sound pressure level (Leq) and percentile sound pressure
level (Lx) that also complied with International Electrotechnical
Commission Publications 651:1979 (Type 1) and 804:1985 (Type 1) specifications.
Table 3.3 summarizes the noise monitoring
equipment being used by the ET for Agreement No. CE
59/2015 (EP) within the reporting period.
Copies of calibration certificates are attached in Appendix B.
Table
3.3 Noise Monitoring Equipment
|
Equipment
|
Model
|
Quantity
|
|
Integrating Sound Level Meter
|
BSWA 308 (Serial No.: 570183, 570187, 570188)
|
3
|
|
Calibrator
|
ST-120 (Serial No.: 181001637, 181001608,
181001636)
|
3
|
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/ Limit Level
exceedance was recorded for all construction noise monitoring in the reporting
month.
3.11
Noise monitoring results and
graphical presentations are shown in Appendix
G.
3.12
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
|
|
CM2
|
Road
Traffic near Eastern Cross Harbour Tunnel Toll Plaza
|
|
CM3
|
Road
Traffic near Eastern Cross Harbour Tunnel Toll Plaza
|
|
CM4
|
Road Traffic at
Cha Kwo Ling Road
|
|
CM5
|
Road Traffic
near Eastern Cross Harbour Tunnel Toll Plaza
|
.
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
3.13
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
(February 2021),
Leq (30min) dB(A)
|
|
CM1 – Nga Lai
House, Yau Lai Estate Phase 1, Yau Tong
|
N1102
|
73
|
70.4
|
|
CM2 – Bik Lai
House, Yau Lai Estate Phase 1, Yau Tong
|
N1204
|
75
|
71.2
|
|
CM3 – Block S,
Yau Lai Estate Phase 5, Yau Tong
|
N2105
|
75
|
73.2
|
|
CM4 – Tin Hau
Temple, Cha Kwo Ling
|
N3101a
|
73
|
64.1
|
|
CM5 – CCC Kei
Faat Primary School, Yau Tong
|
N4101
|
71
|
68.0
|
3.14
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. This
section presents the results of landfill gas measurements performed by the
Contractor of Agreement No. CE 59/2015 (EP). Appendix A shows the Limit Levels for the monitoring works.
10.2
The “Landfill Gas Monitoring
Proposal”, including the monitoring programme and detailed actions, is
submitted to the EPD for approval. Details of monitoring in this
Proposal is in line with the monitoring requirements stipulated in the EM&A
Manual.
10.3 Monitoring parameters for Landfill gas
monitoring include Methane, Carbon dioxide and Oxygen.
10.4
According to the implementation schedule
and recommended mitigation measures of the EM&A Manual, measurements of the
following frequencies should be carried out:
Excavations
deeper than 1m
·
at
the ground surface before excavation commences;
·
immediately
before any worker enters the excavation;
·
at the
beginning of each working day for the entire period the excavation remains
open; and
·
periodically throughout
the working day whilst workers are in the excavation.
Excavations
between 300mm and 1m deep
·
directly
after the excavation has been completed; and
·
periodically
whilst the excavation remains open.
For
excavations less than 300mm deep
·
monitoring
may be omitted, at the discretion of the Safety Officer or other appropriately
qualified person
10.5 Monitoring of oxygen, methane and carbon
dioxide was performed for excavations at 1m depth or more within the
Consultation Zone.
Monitoring Equipment
10.6 Table 10.1 summarizes the equipment
employed by the Contractor of Agreement No. CE 59/2015 (EP) for the landfill gas monitoring.
Table 10.1 Landfill
Gas Monitoring Equipment
|
Equipment
|
Model and Make
|
Quantity
|
|
Portable
gas detector
|
ALTAIR
5X
Multigas
Detector
(Serial
No. 152097)
|
1
|
10.7
In reporting month, landfill gas monitoring was carried out by the
Contractor of Agreement No. CE 59/2015 (EP) on 42 occasions. No Limit Level
exceedance for landfill gas monitoring was recorded in the reporting month. The
monitoring results are provided in the Appendix
K. Copies of calibration certificates are attached in Appendix B.
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
04, 11, 18 and 25 February 2021 in the reporting month. Site inspection of the IEC
was conducted on 18 February 2021. No non-compliance was observed during the
site audit.
12.3
According to Environmental
Permits, the approved EIA Reports (Register No.: AEIAR-174/2013 and
AEIAR-173/2013), and the EM&A Manuals of the Project (AEIAR-174/2013 and
AEIAR-173/2013), the mitigation measures detailed in the documents are recommended
to be implemented during the construction phase. An Environmental Mitigation Implementation
Schedule (EMIS) is provided in Appendix
J.
12.4
The ET weekly site inspections
were carried out during the reporting month and the observations and recommendations are
summarized in Table 12.1. Refer to Appendix I for the site inspection
summary reports in the reporting month.
Table 12.1
Observations and Recommendations of Site Audit
|
Parameters
|
Date
|
Observations and Recommendations
|
Follow-up
|
|
Air Quality
|
N/A
|
There was no observation in the reporting period.
|
N/A
|
|
Noise
|
N/A
|
There was no observation in the reporting period.
|
N/A
|
|
Water Quality
|
N/A
|
There was no observation in the reporting period.
|
N/A
|
|
Ecology
|
N/A
|
There was no observation in the reporting period.
|
N/A
|
|
Landscape and Visual
|
N/A
|
There was no observation in the reporting period.
|
N/A
|
|
Waste / Chemical Management
|
N/A
|
There was no observation in the reporting period.
|
N/A
|
|
Permits /Licences
|
N/A
|
There was no observation in the reporting period.
|
N/A
|
12.5
The Event and Action Plans for
air quality and construction noise monitoring, and the Limit Levels and Action
Plan for landfill gas monitoring are presented in Appendix L.
Air Quality Monitoring
·
No Action/Limit Level exceedance
for 1-hour TSP monitoring was recorded.
·
No Action/Limit Level
exceedance for 24-hour TSP monitoring was recorded.
Construction Noise
Monitoring
·
No Action/ Limit Level
exceedance for construction noise monitoring was recorded in the reporting
month.
Landfill Gas Monitoring
·
No Limit Level exceedance for
landfill gas 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:
Ÿ
West Bound – Drill & Break
Tunnel
Ÿ
East Bound – Drill & Blast
Tunnel
14.3
Key environmental issues in the
coming months include:
Ÿ Make sure noise mitigation measures are implemented accordingly; and
Ÿ
Make sure drainage system is
adequately designed to prevent flooding during periods of heavy rain.
14.4
The tentative environmental monitoring
schedule for the next month is shown in Appendix
D.
15.1
This is the 10th
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 and 24-hour TSP monitoring in the reporting month.
Construction Noise Monitoring
15.3
No Action/ Limit Level
exceedance for construction noise monitoring was recorded in the reporting
month.
Landfill Gas Monitoring
15.4
Monitoring of landfill gases in
the reporting month was carried out by the Contractor of Agreement
No. CE 59/2015 (EP). No Limit Level exceedance for landfill gas monitoring was
recorded in the reporting month.
Site Audit
15.5
4 ET joint weekly environmental
site inspections were conducted in the reporting month.
Complaint, Notification of Summons and Successful Prosecution
15.6
One (1) environmental complaints
was received in the reporting month. And No environmental notifications of
summons and successful prosecutions were received in the reporting month.
15.7
According to the environmental
audit performed in the reporting month, the following recommendations were
made:
Noise
·
Noise mitigation measures, i.e. erecting noise barriers, shall
always be implemented on site to minimize construction noise generated from
construction activities.
