EXECUTIVE SUMMARY
1.
This is the 23rd
Environmental Monitoring and Audit (EM&A) Report prepared by the
Environmental Team (ET), Cinotech Consultants Ltd.,
for Contract No. ED/2018/04 Trunk Road T2
and Infrastructure Works for Developments at the Former South Apron.
This report summarized the monitoring results and audits findings of the
EM&A programme under the issued Environmental Permit (EP) No. EP-458/2013/C
and in accordance with the EM&A Manual (AEIAR-173/2013) during the
reporting month of March 2022.
2. The main works undertaken during the
reporting period are as follows:
West bound Drill & Blast
Tunnel, Service Gallery Drill & Blast, Service Gallery A
Installation, RC Structure Construction
East bound Service Gallery
Drill & Blast, Enlargement Drill & Blast, Type C Bench Drill &
Blast, RC Structure Construction
CKL Junction Reinstatement
works
East Ventilation Building - WB
Excavation, Excavation
3. Implementation of the key mitigation measures
during the reporting period are as follows:
Construction
Noise
Construction activities were
scheduled to minimize noise nuisance to the nearby sensitive receiver.
Use of Quality Powered
Mechanical Equipment (QPME) on site.
Erected the noise barrier on
site.
Air Quality
Regularly watering on site to
avoid dust generation.
Landscape and
Visual
Tree protection zones were
fenced off to protect the existing trees on site.
4. Environmental monitoring for the Project
was performed in accordance with the EM&A Manual and the monitoring results
were checked and reviewed. Site Inspections/Audits were conducted once per
week. The implementation of the environmental mitigation measures, Event Action
Plans and environmental complaint handling procedures were also checked.
5. Summary of the non-compliance (exceedance) in the reporting month
for the Project is tabulated in Table I.
Table I Non-compliance (exceedance) Record for the Project in
the Reporting Month
|
Environmental
Monitoring
|
No. of
Non-compliance (Exceedance)
|
No. of Non-compliance (Exceedance)
due to Construction Activities of this
Project
|
Action Taken
|
|
Action Level
|
Limit Level
|
Action Level
|
Limit Level
|
|
Air Quality
|
0
|
0
|
0
|
0
|
N/A
|
|
Noise
|
0
|
1
|
1
|
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 for 24-hour TSP monitoring was recorded.
Construction Noise
Monitoring
8.
One (1) Action Level exceedance
was recorded due to documented complaint in the reporting month. The Summary of
Documented Complaints in the Reporting Month is tabulated in Table III.
9.
One (1) Limit Level exceedance
for day time construction noise monitoring were recorded in the reporting
month. Detail shall refer to Appendix N.
Water Quality Monitoring
10. Groundwater quality monitoring had been
suspended since October 2019 upon the agreement by EPD. Further details should be founded at Section 4.1.
11. No marine water quality monitoring is required
as no marine works will be conducted at the Cha Kwo
Ling and Lam Tin areas for this project.
12.
As the construction activity is approximately 120m away from the
piezometer gate, no piezometer monitoring is required.
Waste Management
13. Wastes generated from this Project include inert construction and
demolition (C&D) materials, and non-inert C&D materials. Details of
waste management data is presented in Appendix
H.
Ecological Monitoring
14. No coral monitoring is required as no marine works will be conducted
at the Cha Kwo Ling and Lam Tin areas for this
project.
Fisheries Impact Monitoring
15. No specific fisheries monitoring programme
is required during the construction phase.
Monitoring on Cultural
Heritage
16. As the construction works of Cha Kwo Ling Tunnel from the end of Trunk Road T2 to the TKOLTT
at the Eastern Ventilation Building are located more than 100m away from the
Cha Kwo Ling Tin Hau
temple, no monitoring on cultural heritage is required.
Landscape and Visual
Monitoring and Audit
17. The implementation of landscape and visual mitigation measures was
checked by a registered landscape architect. Recommended follow-up actions have
been discharged by the Contractor.
Details of the audit findings and implementation status are presented in
Section 12.
Landfill Gas Monitoring
18. Monitoring of landfill gases was commenced
in December 2016. Since
no excavation activity for this Project was carried out within the Sai Tso Wan
Landfill Consultation Zone in the reporting month, no landfill gas monitoring
is required
Hazard to Life Monitoring
19. No
environmental monitoring and audit is required as no hazard
assessment was conducted.
Environmental Site Inspection
20. Joint weekly site inspections were conducted by representatives of
the Contractor, Engineer and Environmental Team. Details of the audit findings
and implementation status are presented in Section
12.
21. Summary of key information in the reporting month is tabulated in Table II
Table II Summary
of Complaints, Notifications of Summons and Successful Prosecutions in the
Reporting Month
|
Event
|
Event Details
|
Action Taken
|
Status
|
|
Number
|
Nature
|
|
Complaints Received
|
1
|
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.
|
According
to the investigation result for the 1st and follow-up complaint,
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 the 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-RE1201-21), the immediate
remedial action shall be implemented in case adverse ground-borne noise
impact on any noise sensitive receiver is received
|
23. No reporting change in the reporting month.
24. The key works or activities will be
anticipated in the next reporting period are as follows:
Table IV Summary Table
for Site Activities in the next Reporting Period
|
Site Activities (April 2022)
|
Key Environmental Issues
|
|
|
|
1.
West bound Drill & Blast Tunnel,
Service Gallery Drill & Blast, Service Gallery A
Installation, RC Structure Construction
2.
East bound Service Gallery Drill &
Blast, Enlargement Drill & Blast, Type C Bench Drill & Blast, RC Structure
Construction, Service Gallery A Installation
3.
CKL Junction Reinstatement works
4.
East Ventilation Building - WB Excavation,
WB Earthmat & Drainage, Excavation
5. CP33
Excavation
|
(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 23rd Monthly EM&A Report which summarises
the impact monitoring results and audit findings for the EM&A programme during the reporting period in March 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:
West bound Drill & Blast
Tunnel, Service Gallery Drill & Blast, Service Gallery A
Installation, RC Structure Construction
East bound Service Gallery
Drill & Blast, Enlargement Drill & Blast, Type C Bench Drill &
Blast, RC Structure Construction
CKL Junction Reinstatement
works
East Ventilation Building - WB
Excavation, Excavation
1.11
The EM&A programme requires
construction noise, air quality monitoring and environmental site audit, etc.
The EM&A requirements for each parameter are described in the following
sections, including:
All monitoring parameters;
Action and Limit levels for all
environmental parameters;
Event Action Plans;
Environmental mitigation
measures, as recommended in the Project EIA Report.
1.12
The advice on the implementation
status of environmental protection and pollution control/mitigation measures is
summarized in Section 12 of this
report.
1.13
This report presents the
monitoring results, observations, locations, equipment, period, methodology and
QA/QC procedures of the monitoring parameters of the required environmental
monitoring works and audit works for the Project in March 2022.
1.14
All permits/licenses obtained for the Project are summarized
in Table 1.2.
Table 1.2 Summary of Environmental License and
Permit
|
Permit
/ License No.
|
Valid Period
|
Status
|
|
From
|
To
|
|
Environmental
Permit (EP)
|
|
EP-451/2013
|
19 Sep 2013
|
N/A
|
Valid
|
|
EP-458/2013/C
|
20 Jan 2017
|
N/A
|
Valid
|
|
Notification pursuant to Air Pollution
(Construction Dust) Regulation
|
|
Ref. No.: 451120
|
20 Nov 2019
|
N/A
|
Valid
|
|
Billing Account for Construction Waste
Disposal
|
|
A/C No.: 7036016
|
09 Dec 2019
|
N/A
|
Valid
|
|
Construction Noise Permit
|
|
CNP No. (For Portion Q): GW-RE0900-21
|
23 Sep 2021
|
22 Mar 2022
|
Expired on 22 March 2022
|
|
CNP No. (For Portion T1): GW-RE1201-21
|
06 Dec 2021
|
05 Mar 2022
|
Expired on 05 March 2022
|
|
CNP No. (For Portion Q): GW-RE0227-22
|
24 Mar 2022
|
23 Sep 2022
|
Valid
|
|
CNP No. (For Portion T1): GW-RE0199-22
|
05 Mar 2022
|
04 July 2022
|
Valid
|
|
Wastewater Discharge License
|
|
WT00036699-2020
|
14 Jan 2021
|
31 Jan 2026
|
Valid
|
|
Chemical Waste Producer License
|
|
WPN: 5213-286-B2557-03
|
09 Mar 2020
|
N/A
|
Valid
|
2.1
According to Section 2.2.4 of
the EM&A Manual (AEIAR-173/2013), 1-hour and 24-hour Total Suspended Particulates (TSP) monitoring
was conducted to monitor the air quality for this Project. For regular impact
monitoring, a sampling frequency of at least once in every six days at all of
the monitoring stations for 1-hour and 24-hour TSP monitoring. Appendix A shows the established Action/Limit Levels for the environmental
monitoring works.
2.2
Five designated monitoring
stations were selected for air quality monitoring programme. Table 2.1 describes the air quality
monitoring locations, which are also depicted in Figure 2.
Table 2.1 Air Quality Monitoring Locations
|
Monitoring
Stations
|
Location
|
Location of Measurement
|
|
AM1
|
Tin Hau
Temple
|
Ground Level
|
|
AM2
|
Sai Tso Wan Recreation Ground
|
Ground Level
|
|
AM3
|
Yau Lai Estate Bik Lai House
|
Rooftop (41/F)
|
|
AM4(1)
|
Sitting-out Area at Cha Kwo Ling Village
|
Ground Level
|
|
AM4(A)(2) (*)
|
Cha Kwo
Ling Public Cargo Working Area Administrative Office
|
Rooftop (3/F)
|
Remarks:
(1) For 1-hour TSP monitoring;
(2) For 24-hour TSP monitoring
(*) Air quality monitoring at designated station
AM4 (24-hr TSP) was rejected by the premise owners.
Therefore, baseline and impact air quality
monitoring works were carried out at alternative air quality monitoring
stations AM4 (A) (24-hr TSP only)
2.3
Table 2.2 summarizes the monitoring
parameters, monitoring period and frequencies of impact air quality monitoring.
The monitoring schedule is shown in
Appendix D.
Table 2.2 Frequency and Parameters of Air Quality
Monitoring
|
Monitoring
Stations
|
Parameter
|
Period
|
Frequency
|
|
AM1, AM2, AM3, AM4
|
1-hour TSP
|
0700 1900
|
3
times per 6 days
|
|
AM1, AM2, AM3, AM4(A)
|
24-hour TSP
|
24 hours
|
Once every 6 days
|
2.4
High Volume Samplers (HVS) in compliance
with the specification stipulated in the EM&A Manual (AEIAR-173/2013),
Section 2.3.1, were used to carry out 24-hour TSP monitoring. Direct reading
dust meter were also used to measure 1-hour average TSP levels. The 1-hour
sampling was determined by HVS to check the validity and accuracy of the
results measured by direct reading method.
2.5
Wind data monitoring equipment
was set at rooftop (about 41/F) of Yau Lai Estate Bik
Lai House for logging wind speed and wind direction such that the wind sensors
are clear of obstructions or turbulence caused by building. The wind data
monitoring equipment is re-calibrated at least once every six months and the
wind directions are divided into 16 sectors of 22.5 degrees each. The location
is shown in Figure 2. This weather information for the reporting month is
summarized in Appendix C.
2.6
Table 2.3 summarizes the
equipment used for air quality monitoring by the ET for Contract No. CE 59/2015
(EP). Copies of calibration certificates are attached in Appendix B.
Table 2.3 Air Quality Monitoring Equipment
|
Equipment
|
Model
|
Quantity
|
|
1-hour TSP Dust
Meter
|
Sibata
Model No. LD-5R
(Serial No.: 972781, 972778)
|
2
|
|
HVS Sampler
|
TISCH Model: TE-5170 (Serial No.: 1536)
|
1
|
|
GMW model: GS2310
(Serial No.: 1287, 10379, 10599)
|
3
|
|
Calibrator
|
TISCH Model: TE-5025A
(Serial No.: 3864)
|
1
|
|
Wind Anemometer
|
Davis Weather
Monitor II, Model no. 7440
(Serial No.:
MC01010A44)
|
1
|
1-hour TSP Monitoring
Measuring Procedures
2.7
The measuring procedures of the 1-hour dust
meter are in accordance with the Manufacturers Instruction Manual as follows:
(Sibata Model No.:
LD-5R)
·
The 1-hour dust meter is placed
at least 1.3 meters above ground.
·
Set POWER to ON and make sure
that the battery level was not flash or in low level.
·
Allow the instrument to stand
for about 3 minutes and then the cap of the air sampling inlet has been
released.
·
Push the knob at MEASURE
position.
·
Set time/mode setting to [BG]
by pushing the time setting switch.
Then, start the background measurement by pushing the start/stop switch
once. It will take 6 sec. to complete the
background measurement.
·
Push the time setting switch to
change the time setting display to [MANUAL] at the bottom left of the liquid
crystal display. Finally, push the start/stop switch to stop the measuring
after 1 hour sampling.
·
Information such as sampling
date, time, count value and site condition were recorded during the monitoring
period.
Maintenance/Calibration
2.8
The following maintenance/calibration is required for the 1-hour dust meter:
·
Check and calibrate the meter
by HVS to check the validity and accuracy of the results measured by direct
reading method at 2-month intervals throughout all stages of the air quality
monitoring.
24-hour TSP Monitoring
Instrumentation
2.9
High volume samplers (HVS) (TISCH Model: TE-5170 and GMW Model: GS2310)
completed with appropriate sampling inlets were employed for 24-hour TSP
monitoring. The sampler was composed of
a motor, a filter holder, a flow controller and a sampling inlet and its
performance specification complied with that required by USEPA Standard Title
40, Code of Federation Regulations Chapter 1 (Part 50).
2.10
The positioning of the
HVS samplers are as follows:
·
A
horizontal platform with appropriate support to secure the samplers against
gusty wind shall be provided;
·
No
two samplers shall be placed less than 2 meter apart;
·
The
distance between the sampler and an obstacle, such as buildings, must be at
least twice the height that the obstacle protrudes above the sampler;
·
A
minimum of 2 metres of separation from walls, parapets and penthouses is
required for rooftop samplers;
·
A
minimum of 2 metres of separation from any supporting structure, measured
horizontally is required;
·
No
furnace or incinerator flue is nearby;
·
Airflow
around the sampler is unrestricted;
·
The
sampler is more than 20 metres from the dripline;
·
Any
wire fence and gate, to protect the sampler, shall not cause any obstruction
during monitoring;
·
Permission
must be obtained to set up the samplers and to obtain access to the monitoring
stations; and
·
A
secured supply of electricity is needed to operate the samplers.
Operating/analytical
procedures for the operation of HVS
2.11
Operating/analytical procedures for the air quality monitoring are highlighted as
follows:
·
Prior to the commencement of
the dust sampling, the flow rate of the high volume
sampler was properly
set (between 0.6 m3/min. and 1.7 m3/min.) in accordance
with the EM&A manual (AEIAR-173/2013). The flow rate shall be indicated
on the flow rate chart.
·
For
TSP sampling, fiberglass filters with a collection efficiency of > 99% for
particles of 0.3μm diameter were used.
·
The
power supply was checked to ensure the sampler worked properly. On sampling, the sampler was operated for 5
minutes to establish thermal equilibrium before placing any filter media at the
designated air monitoring station.
·
The
filter holding frame was then removed by loosening the four nuts and a weighted
and conditioned filter was carefully centered with
the stamped number upwards, on a supporting screen.
·
The
filter was aligned on the screen so that the gasket formed an airtight seal on
the outer edges of the filter. Then the
filter holding frame was tightened to the filter holder with swing bolts. The
applied pressure should be sufficient to avoid air leakage at the edges.
·
The
shelter lid was closed and secured with the aluminum
strip.
·
The
timer was then programmed. Information
was recorded on the record sheet, which included the starting time, the weather
condition and the filter number (the initial weight of the filter paper can be
found out by using the filter number).
·
After
sampling, the filter was removed and sent to the HOKLAS laboratory (ALS Technichem (HK) Pty Ltd.) for weighing. The elapsed time was also recorded.
·
Before
weighing, all filters were equilibrated in a conditioning environment for 24
hours. The conditioning environment temperature should be between 25°C and 30°C
and not vary by more than ±3°C; the relative humidity (RH) should be < 50%
and not vary by more than ±5%. A convenient working RH
is 40%.
Maintenance/Calibration
2.12
The following maintenance/calibration is required for the HVS:
·
The
high volume motors and their accessories were properly
maintained. Appropriate maintenance such as routine motor brushes replacement
and electrical wiring checking were made to ensure that the equipment and
necessary power supply are in good working condition.
High volume samplers were
calibrated at bi-monthly intervals using TE-5025A Calibration Kit
throughout all stages of the air quality monitoring.
2.13
The
impact monitoring
works for air quality monitoring locations AM1, AM2, AM3, AM4 and AM4 (A) are
completed by the ET of Agreement No. CE 59/2015 (EP), and the data will be
adopted in this report.
2.14
The impact air quality monitoring was conducted at all five monitoring
stations as scheduled. The monitoring schedule is shown in Appendix D.
2.15
No Action/ Limit Level exceedance were recorded for 24-hour TSP
monitoring in the reporting month.
2.16
No Action/ Limit Level exceedance was recorded for 1-hour TSP monitoring
in the reporting month.
2.17
The monitoring data and graphical presentations of 1-hour and 24-hour
TSP monitoring results are shown in Appendix E and Appendix F respectively.
2.18
According to field observations by ET for
Agreement No. CE 59/2015 (EP) in the reporting period, the major dust source
identified at the designated air quality monitoring stations are as follows:
Table 2.4 Major Dust Source
during Air Quality Monitoring
|
Monitoring Stations
|
Major Dust Source
|
|
AM1 Tin Hau Temple
|
Road Traffic at
Cha Kwo Ling Road, non-project related influence
and the construction activity from other construction site
|
|
AM2 Sai Tso Wan Recreation Ground
|
Road Traffic
along Sin Fat Road
|
|
AM3 Yau Lai Estate Bik Lai House
|
Road Traffic near
Eastern Cross Harbour Tunnel Toll Plaza, non-project related influence and
the construction activity from other construction site
|
|
AM4 - Sitting-out Area at Cha Kwo Ling
Village
|
Road Traffic
at Cha Kwo Ling Road
|
|
AM4(A) - Cha Kwo Ling Public Cargo
Working Area Administrative Office
|
Road Traffic
at Cha Kwo Ling Road
|
Comparison
of EM&A Result with EIA Prediction
2.19
The air monitoring data was compared with the predictions (with the assessment height
of 1.5 mAG) in Table 3.17 of EIA Report,
AEIAR-173/2013 (as approved in 2013) as summarised in Table 2.5 and Table 2.6.
Table
2.5 Comparison of 1-hr TSP Monitoring
Data with Predictions in EIA Report
|
Monitoring Stations
|
ASR ID
|
Predicted Maximum 1-hr TSP
Concentration
in EIA
Report (AEIAR-173/2013), μg/m3
|
Maximum 1-hr TSP
Concentration
in the Reporting Month
(March 2022),
μg/m3
|
|
AM1 Tin Hau Temple
|
CL1
|
707
|
66.7
|
|
AM2 Sai Tso Wan
Recreation Ground
|
CL6
|
266
|
144.9
|
|
AM3 Yau
Lai Estate Bik Lai House
|
CL9
|
507
|
96.6
|
|
AM4 - Sitting-out Area at
Cha Kwo Ling Village
|
CL16
|
430
|
66.7
|
Table
2.6 Comparison of 24-hr TSP
Monitoring Data with Predictions in EIA Report
|
Monitoring Stations
|
ASR ID
|
Predicted Maximum 24-hr TSP
Concentration
in EIA
Report (AEIAR-173/2013), μg/m3
|
Maximum 24-hr TSP
Concentration
in the Reporting Month
(March 2022),
μg/m3
|
|
AM1 Tin Hau Temple
|
CL1
|
199
|
100.3
|
|
AM2 Sai Tso Wan
Recreation Ground
|
CL6
|
109
|
42.1
|
|
AM3 Yau
Lai Estate Bik Lai House
|
CL9
|
123
|
98.7
|
|
AM4(A) - Cha Kwo Ling Public Cargo Working Area Administrative Office (*)
|
N/A(1)
|
N/A(1)
|
93.2
|
Remarks:
(1)
No 24-hr TSP concentration was predicted in EIA
Report (AEIAR-173/2013)
(*) Air quality monitoring at designated station
AM4 (24-hr TSP) was rejected by the premise owners. Therefore, baseline and
impact air quality monitoring works were carried out at
alternative air quality monitoring stations AM4 (A) (24-hr TSP only)
2.20
In the reporting month, the 1-hour TSP concentrations at
AM1, AM2, AM3 and AM4 were lower than the prediction in the EIA Report,
AEIAR-173/2013 (as approved in 2013). No Action/Limit level exceedance was
recorded in the reporting period.
2.21
In the reporting month, the 24-hour TSP
concentrations at AM1 AM2 and AM3 were lower than the prediction in the EIA
Report, AEIAR-173/2013 (as approved in 2013). No Action/
Limit level exceedance was recorded in the reporting period. Details of the
exceedance shown in Appendix N.
3
noise
Monitoring Requirements
3.1
According to Section 3.2.1 of the EM&A Manual (AEIAR-173/2013), construction noise monitoring
was conducted to monitor the construction noise arising from the construction
activities. The regular monitoring frequency for each monitoring station shall
be on a weekly basis and conduct one set of measurements between 0700 and 1900
hours on normal weekdays. Appendix A
shows the established Action and Limit Levels for the environmental monitoring
works.
Monitoring Locations
3.2
Noise monitoring was conducted
at five designated monitoring stations, namely CM1, CM2, CM3, CM4 and CM5 in
the reporting period. Table 3.1 and Figure 2 show the locations of these
stations.
Table
3.1 Noise Monitoring Stations
|
Monitoring Stations
|
Location
|
Location of Measurement
|
|
CM1
|
Nga Lai House, Yau Lai Estate Phase 1, Yau
Tong
|
Rooftop (41/F)
|
|
CM2
|
Bik Lai House, Yau Lai Estate Phase 1, Yau
Tong
|
Rooftop (41/F)
|
|
CM3
|
Block S, Yau Lai Estate Phase 5, Yau
Tong
|
Rooftop (40/F)
|
|
CM4
|
Tin Hau Temple, Cha Kwo Ling
|
Ground Level
|
|
CM5
|
CCC Kei Faat Primary School, Yau Tong
|
Rooftop (6/F)
|
Monitoring
Parameters, Frequency and Duration
3.3
Table 3.2 summarizes the monitoring
parameters, frequency and total duration of monitoring. The noise monitoring schedule is shown in Appendix D.
Table
3.2 Frequency and Parameters of
Noise Monitoring
|
Monitoring Stations
|
Time Period
|
Duration
|
Frequency
|
Parameter
|
Measurement
|
|
CM1
|
0700-1900 hrs on normal weekdays
|
30 minutes
|
Once per week
|
L10(30 min.)
dB(A)
L90(30
min.) dB(A)
Leq(30 min.) dB(A)
|
Faηade Measurement
|
|
CM2
|
Faηade Measurement
|
|
CM3
|
Faηade Measurement
|
|
CM4
|
Faηade Measurement
|
|
CM5
|
Faηade 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.:
580156)
|
1
|
|
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 faηade 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
One (1) Action Level exceedance was recorded due to the documented
complaint in the reporting month.
3.11
One (1) Limit Level exceedance was recorded for day-time construction
noise monitoring in the reporting month. Detail shall refer to Appendix N.
3.12
Noise monitoring results and graphical presentations are shown in
Appendix G.
3.13
According to field observations by ET for
Agreement No. CE 59/2015 (EP) in the reporting period, the major noise sources
identified at the noise monitoring stations are shown in Table 3.4.
Table 3.4 Other Noise Source Identified during
Noise Monitoring
|
Monitoring Stations
|
Major Noise Source
|
|
CM1
|
Road Traffic near Eastern Cross Harbour
Tunnel Toll Plaza, non-project related construction activities
|
|
CM2
|
Road Traffic near Eastern Cross Harbour
Tunnel Toll Plaza, non-project related construction activities
|
|
CM3
|
Road Traffic near Eastern Cross Harbour
Tunnel Toll Plaza non-project related construction activities
|
|
CM4
|
Road
Traffic at Cha Kwo Ling Road, non-project related
construction activities
|
|
CM5
|
Road
Traffic near Eastern Cross Harbour Tunnel Toll
Plaza,
Construction
activity from other construction site,
Road
Traffic at Yau Tong Road
|
.
Table 3.5 Baseline Noise Level and Noise Limit
Level for Monitoring Stations
|
Monitoring Stations
|
Baseline
Noise Level, dB (A)
(at 0700 1900 hrs on normal weekdays)
|
Noise
Limit Level, dB (A) (at 0700 1900 hrs on normal weekdays)
|
|
CM1
|
65.5
|
75
|
|
CM2
|
63.6
|
|
CM3
|
65.6
|
|
CM4
|
62.0
|
|
CM5
|
68.2
|
70*
|
(*)
Noise Limit Level is 65 dB(A) during school examination periods.
Comparison of EM&A Result with EIA Prediction
3.14
The noise monitoring data was compared with the
predictions in Table 4.15 of EIA Report (AEIAR-173/2013) as summarised in Table 3.6.
Table 3.6 Maximum Predicted Mitigated Construction
Noise Levels in EIA Report
|
Monitoring
Stations
|
NSR ID
|
Maximum Predicted Mitigated
Construction Noise Levels in EIA Report (AEIAR-173/2013),
dB(A)
|
Maximum Construction
Noise Levels in the Reporting Month
(March 2022),
Leq (30min) dB(A)
|
|
CM1 Nga Lai House,
Yau Lai Estate Phase 1, Yau
Tong
|
N1102
|
73
|
76.0
|
|
CM2 Bik Lai
House, Yau Lai Estate Phase 1, Yau
Tong
|
N1204
|
75
|
74.6
|
|
CM3 Block S,
Yau Lai Estate Phase 5, Yau
Tong
|
N2105
|
75
|
73.8
|
|
CM4 Tin Hau Temple, Cha Kwo Ling
|
N3101a
|
73
|
68.3
|
|
CM5 CCC Kei Faat Primary School, Yau Tong
|
N4101
|
71
|
72.5
|
3.15
The result at CM5 was higher than the maximum predicted mitigated
construction noise level in the EIA Report, AEIAR-173/2013 (as approved in
2013), that may due to the fluctuation of road traffic along Yau Tong Road. According to the field observation made by
ET for Agreement No. CE 59/2015 (EP), the major noise source identified at CM1
were the construction activities of TKOLTT and road traffic near
Eastern Cross Harbour Tunnel Toll Plaza, therefore, the result at CM1 was higher than the maximum predicted mitigated
construction noise level in the EIA Report, AEIAR-173/2013 (as approved in
2013), that may due to the non-project related construction activities and the
fluctuation of road traffic nearby. However, the results at CM2, CM3 and CM4
were lower than the maximum predicted mitigated construction noise level in the
EIA Report, AEIAR-173/2013 (as
approved in 2013). One (1) Limit level exceedance was
recorded in the reporting period. Detail of exceedance is presented in Appendix N.
4
Water
quality
Groundwater Quality
4.1
The existing groundwater
quality monitoring programme has been suspended as the monitoring results had
been deemed non-representative of the impact from the project justified by two
major factors: (1) influence on the monitoring results from non-project related
factors, such as anthropogenic activities and natural phenomenon; and (2) large separation between
the monitoring stations and works area. In addition, as no alternative
locations for the groundwater quality monitoring were available, the
groundwater quality monitoring has been suspended since October 2019 upon the
agreement by EPD.
Marine Water Quality
4.2
According to Section 4.4.3 of EM&A Manual (AEIAR-173/2013), marine water quality impact monitoring stations is
carried out during marine construction for TKOLTT reclamation. Since the
construction of Cha Kwo Ling Tunnel from the end of
Trunk Road T2 to the TKOLTT at the Eastern Ventilation Building does not
involve reclamation, the marine water quality monitoring programme
stated in Section 4.4 of the EM&A Manual (AEIAR-173/2013) is therefore not applicable to Contract No. ED/2018/04.
Groundwater Level
Monitoring (Piezometer Monitoring)
4.3
According to Section 4.1.2 of EM&A Manual (AEIAR-173/2013), daily piezometer monitoring will be carried out on a
daily basis when any tunnel construction activities are carried out within +/-
50m of the piezometer gate in plan. As the construction works of Cha Kwo Ling Tunnel from the end of Trunk Road T2 to the TKOLTT at the Eastern Ventilation
Building is approximately 120m away from
the piezometer gate in plan, the piezometer monitoring programme stated in Section 4.2 of the EM&A Manual (AEIAR-173/2013) is therefore not applicable to Contract No. ED/2018/04.
5.1
According to Section 5.1.2 of
the EM&A Manual (AEIAR-173/2013), Waste materials generated during
construction activities, such as construction and demolition (C&D)
materials and general refuse, are recommended to be audited at regular
intervals (at least quarterly) to ensure that proper storage, transportation
and disposal practices are being implemented by the Contractor. To fulfil this
requirement, site audits are carried out on a weekly basis. The summaries of
site audits are attached in Appendix I.
5.2
With reference to relevant
handling records of this Project, the quantities of different types of waste
generated in the reporting month are summarised and presented in Appendix H.
Post-Translocation Coral Monitoring
6.1
Post-translocation monitoring survey
is recommended in Section 6.2.5 of the EM&A Manual (AEIAR-173/2013), to audit the success of coral
translocation. Since the construction of Cha Kwo Ling Tunnel from the end of Trunk Road T2 to the TKOLTT
at the Eastern Ventilation Building does not involve any marine works in the concerned area
mentioned in Section 6.1.2 of the EM&A Manual (AEIAR-173/2013), the
post-translocation monitoring survey stated in Section 6.2.5 of the EM&A Manual (AEIAR-173/2013) is therefore not applicable to Contract No. ED/2018/04.
7
fisheries
7.1
According to Section 7.1.3 of EM&A Manual (AEIAR-173/2013), no specific fisheries
monitoring programme is required during the construction phase.
7.2
The implementation of the mitigation measures stated in
the Water Quality Impact Assessment (Refer to Section 5 of EIA Report (AEIAR-173/2013)) will be audited as part of the
EM&A procedures during the construction period. The summaries of site
audits are attached in Appendix I.
8.1
According to Condition 3.7 of
EP-458/2013/C and Section 8.2.1 of the EM&A Manual (AEIAR-173/2013),
monitoring of vibration impacts was conducted when the construction works
are less than 100m from the Built Heritage in close proximity of the worksite,
namely the Cha Kwo Ling Tin Hau
temple. Tilting and settlement monitoring should be applied on the Cha Kwo Ling Tin Hau Temple.
8.2
As the construction works of Cha Kwo
Ling Tunnel from the end of Trunk Road T2 to the TKOLTT at the Eastern
Ventilation Building are located more than 100m away from the Cha Kwo Ling Tin Hau temple, the
vibration impact monitoring stated in Section 8.3.1 of the EM&A Manual
(AEIAR-173/2013)
is not applicable to Contract No. ED/2018/04.
Mitigation Measures for
Cultural Heritage
8.3
According to Condition 3.6 of EP-458/2013/C, to prevent damage to Cha Kwo Ling Tin Hau Temple and its Fung Shui rocks (Child-given rocks)
during the construction phase, a temporarily fenced-off buffer zone (Rocks buffer zone is 5 m from the
edge of Rocks and 15m from the edge of Rocks alter) with allowance for public
access (minimum 1 m) around the temple and the Fung
Shui rocks
shall be provided. The open yard in front of the
temple should be kept as usual for annual Tin Hau
festival.
8.4
As there is a large buffer
distance from the current works to Cha Kwo Ling Tin Hau
Temple and the Fung Shui rocks (Child-given rocks), the
temporarily fenced-off rocks buffer zone and from the edge of Rocks alter is not required. The fenced-off rocks buffer zone would be
implemented when there is construction activities in vicinity of the cultural
heritage.
9.1
According to Section 9.3 of the
EM&A Manual (AEIAR-173/2013), landscape and visual mitigation measures
during the construction phase shall be checked to ensure that they are fully
realized and implemented on site.
9.2
Site audits were carried out on
a weekly basis to monitor and audit the timely implementation of landscape and
visual mitigation measures listed in Environmental Mitigation Implementation
Schedule (EMIS) (shown in Appendix J).
9.3
The implementation of landscape and visual mitigation measures was checked by a registered
landscape architect. No non-compliance of the landscape and visual impact was
recorded in the reporting month. Details of the audit findings and
implementation status are presented in Appendix
I.
10.1 In accordance with Section 10.1.1
of the EM&A Manual (AEIAR-173/2013), monitoring of landfill gas is required for construction works within
the Sai Tso Wan Landfill Consultation Zone during the construction phase. Since no excavation activity for this Project was carried out
within the Sai Tso Wan Landfill Consultation Zone in the reporting month, no
landfill gas monitoring is required.
11.1
According to Section 11.1.1 of EM&A Manual
(AEIAR-173/2013), as no overnight storage of explosive on site is required for
the construction of the Project, the hazard assessment is deemed not necessary.
Thus, environmental monitoring and audit is not required.
12
ENVIRONmental audit
12.1
Site audits were carried out on a
weekly basis to monitor the timely implementation of proper environmental
management practices and mitigation measures in the Project site. The summaries of site audits are attached in
Appendix I.
12.2
Site audits were conducted on 03, 11, 17, 24 and
31 March 2022 in the reporting month. Site inspection of the IEC was conducted
on 17 March 2022. No non-compliance was observed during the site audit.
12.3
According to Environmental Permits, the approved EIA Reports (Register
No.: AEIAR-174/2013 and AEIAR-173/2013), and the EM&A Manuals of the
Project (AEIAR-174/2013 and AEIAR-173/2013), the mitigation measures detailed
in the documents are recommended to be implemented during the construction
phase. An Environmental Mitigation
Implementation Schedule (EMIS) is provided in Appendix J.
12.4
The ET weekly site inspections were carried out
during the reporting month and the observations and recommendations are
summarized in Table 12.1. Refer to Appendix I for the site inspection
summary reports in the reporting month.
Table
12.1 Observations and Recommendations
of Site Audit
|
Parameters
|
Date
|
Observations
and Recommendations
|
Follow-up
|
|
Air Quality
|
N/A
|
|
N/A
|
|
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
|
N/A
|
There
was no observation in the reporting period.
|
N/A
|
|
|
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
·
One (1) Action Level exceedance
was recorded due to the documented complaint in the reporting month.
·
One (1) Limit Level exceedance
for construction noise monitoring was recorded in the reporting month.
13.1
The summaries
of environmental complaint, warning, summon and notification of successful
prosecution for the Project is presented in Appendix M.
13.2
The summary
of exceedance record in the reporting month is shown in Appendix N.
14.1
Tentative construction programmes for the next three months are provided
in Appendix O.
14.2
Major site activities undertaken for the coming
months are summarized as follows:
West bound Drill & Blast
Tunnel, Service Gallery Drill & Blast, Service Gallery A Installation, RC
Structure Construction
East bound Service Gallery
Drill & Blast, Enlargement Drill & Blast, Type C Bench Drill &
Blast, RC Structure Construction, Service Gallery A Installation
CKL Junction Reinstatement
works
East Ventilation Building - WB
Excavation, WB Earthmat & Drainage, Excavation
CP33 Excavation
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 23rd Monthly EM&A Report which presents the EM&A works undertaken
during the reporting month in accordance with the EM&A Manual (AEIAR-173/2013) and the requirement under EP.
Air Quality Monitoring
14.6
No Action/Limit Level exceedance was recorded
for 1-hour TSP monitoring in the reporting month.
14.7
No Action/ Limit
Level exceedance was recorded for 24-hour TSP monitoring in the reporting
month.
Construction Noise Monitoring
14.8
One (1) Action Level exceedance
was recorded due to documented complaint in the reporting month.
14.9
One (1)
Limit Level exceedance for construction noise monitoring was recorded in the
reporting month.
Site Audit
14.10 5 ET joint weekly environmental site inspections were conducted in
the reporting month.
Complaint, Notification
of Summons and Successful Prosecution
14.11 One (1) 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:
Noise
·
Noise barriers were erected
and located as close as possible to the noise source on site for the
construction noise reduction.
