EXECUTIVE
SUMMARY
1.
This is the 31th
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 November 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 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
|
0
|
0
|
0
|
0
|
N/A
|
|
Marine Water Quality
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
|
Groundwater Level Monitoring (Piezometer
Monitoring)
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
|
Ecological
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
|
Cultural Heritage
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
|
Landfill Gas
|
N/A(1)
|
N/A
|
N/A(1)
|
N/A
|
N/A
|
|
Note: (1): No Action
Level for Landfill Gas Monitoring.
|
Air Quality Monitoring
6.
No Action/Limit Level exceedance for 1-hour
TSP monitoring was recorded.
7.
No Action/Limit Level exceedance was recorded for 24-hour TSP monitoring in
the reporting month.
Construction Noise Monitoring
8.
No Action Level exceedance was recorded due
to documented complaint in the reporting month. The Summary of Documented
Complaints in the Reporting Month is tabulated in Table III.
9.
No Limit Level exceedance for day time
construction noise monitoring were recorded in the reporting month. Detail
shall refer to Appendix N.
Water Quality Monitoring
10.
Groundwater quality
monitoring had been suspended since October 2019 upon the agreement by EPD.
Further details should be founded at Section
4.1.
11.
No marine water quality
monitoring is required as no marine works will be conducted at the Cha Kwo Ling
and Lam Tin areas for this project.
12. As the construction activity is approximately 120m
away from the piezometer gate, no piezometer monitoring is required.
Waste Management
13. Wastes
generated from this Project include inert construction and demolition (C&D)
materials, and non-inert C&D materials. Details of waste management data is
presented in Appendix H.
Ecological Monitoring
14. No
coral monitoring is required as no marine works will be conducted at the Cha
Kwo Ling and Lam Tin areas for this project.
Fisheries Impact Monitoring
15.
No specific fisheries
monitoring programme is required during the construction phase.
Monitoring on Cultural Heritage
16.
As the construction works
of Cha Kwo Ling Tunnel from the end of Trunk Road T2 to the TKOLTT at the
Eastern Ventilation Building are located more than 100m away from the Cha Kwo
Ling Tin Hau temple, no monitoring on cultural heritage is required.
Landscape and Visual Monitoring and Audit
17. The
implementation of landscape and visual mitigation measures was checked by a
registered landscape architect. Recommended follow-up actions have been
discharged by the Contractor.
Details of the audit findings and implementation status are presented in
Section 12.
Landfill Gas Monitoring
18.
Monitoring of landfill
gases was commenced in December 2016. Since no excavation activity for this Project was
carried out within the Sai Tso Wan Landfill Consultation Zone in the reporting
month, no landfill gas monitoring is required
Hazard
to Life Monitoring
19.
No environmental monitoring and audit is required
as no hazard assessment was conducted.
Environmental
Site Inspection
20. Joint
weekly site inspections were conducted by representatives of the Contractor,
Engineer and Environmental Team. Details of the audit findings and
implementation status are presented in Section
12.
21. Summary
of key information in the reporting month is tabulated in Table II
Table II Summary
of Complaints, Notifications of Summons and Successful Prosecutions in the
Reporting Month
|
Event
|
Event Details
|
Action Taken
|
Status
|
|
Number
|
Nature
|
|
Complaints Received
|
0
|
--
|
N/A
|
N/A
|
|
Notifications of any
summons & prosecutions received
|
0
|
--
|
N/A
|
N/A
|
22. Summary
of complaints received in the reporting month is tabulated in Table III.
Table
III Summary of
Complaints Details in Reporting Month
|
Complaint Type
|
Investigation Findings
|
Follow-up Action / Mitigation Measure
|
|
-
|
-
|
-
|
Reporting Changes
23.
No reporting change is
recorded in the reporting months.
24.
The key works or activities
will be anticipated in the next reporting period are as follows:
Table IV
Summary Table for Site Activities in the next Reporting Period
|
Site
Activities (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, 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 31th
Monthly EM&A
Report which summarises the impact monitoring results and audit findings for
the EM&A programme during the reporting period in November 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
|
Mr. Marcus Cheung
|
6628 2685
|
|
|
1.9
The Organizational Structure
for Environmental Management is shown in Figure
1.2.
1.10
The major site activities undertaken in the
reporting month included:
·
East Bound –
RC Structure Construction, Service Gallery Drill & Blast, Service Gallery A
Installation.
·
East Ventilation Building –
WB Blinding & Waterproofing and RC Structure.
·
West Bound –
Extension & Blast Tunnel, RC Structure Construction.
1.11
The EM&A programme requires construction
noise, air quality monitoring and environmental site audit, etc. The EM&A
requirements for each parameter are described in the following sections,
including:
·
All monitoring parameters;
·
Action and Limit levels for all
environmental parameters;
·
Event Action Plans;
·
Environmental mitigation measures, as
recommended in the Project EIA Report.
1.12
The advice on the implementation status of
environmental protection and pollution control/mitigation measures is
summarized in Section 12 of this
report.
1.13
This report presents the monitoring results,
observations, locations, equipment, period, methodology and QA/QC procedures of
the monitoring parameters of the required environmental monitoring works and
audit works for the Project in November 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-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, 8Y2373, 8Y2374)
Sibata Model No. LD-3B
(Serial No.2Y6194)
|
7
|
|
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
(November 2022),
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
|
150.0
|
|
AM4 - Sitting-out Area
at Cha Kwo Ling Village
|
CL16
|
430
|
152.5
|
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
(November 2022),
μg/m3
|
|
AM1 – Tin Hau Temple
|
CL1
|
199
|
156.8
|
|
AM2 – Sai Tso Wan Recreation Ground
|
CL6
|
109
|
57.4
|
|
AM3 – Yau Lai Estate Bik Lai House
|
CL9
|
123
|
30.4
|
|
AM4(B) – Flat 103 Cha Kwo Ling Village (*)
|
N/A(1)
|
N/A(1)
|
200.2
(**)
|
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 (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
|
BSWA 308 (Serial No.:
580287,580156)
|
2
|
|
Calibrator
|
ST-120
(Serial No.: 181001608, 181001637)
|
2
|
Monitoring
Methodology and QA/QC Procedure
3.5
The monitoring procedures are as follows:
·
The monitoring
station was normally be at a point 1m from the exterior of the sensitive
receivers building façade and be at a position 1.2m above the ground.
·
For free field measurement, the meter was positioned away from any nearby reflective
surfaces. All records for free field noise levels were
adjusted with a correction of +3 dB(A).
·
The battery condition was checked to ensure the correct functioning
of the meter.
·
Parameters such as frequency weighting, the
time weighting and the measurement time were set as follows:
-
Frequency weighting: A
-
Time weighting: Fast
-
Time measurement: 30 minutes
·
Prior to and after each noise measurement,
the meter was calibrated using a Calibrator for 94.0 dB at 1000 Hz. If the difference in the calibration level
before and after measurement was more than 1.0 dB, the measurement would be
considered invalid and repeat of noise measurement would be required after
re-calibration or repair of the equipment.
·
The wind speed was frequently checked with
the portable wind meter.
·
At the end of the monitoring period, the Leq,
L90 and L10 were recorded. In addition, site conditions and noise
sources were recorded on a standard record sheet.
·
Noise monitoring would be cancelled in the
presence of fog, rain, and wind with a steady speed exceeding 5 m/s, or wind with gusts exceeding 10 m/s. Supplementary monitoring would be
provided
to ensure sufficient data would be obtained.
3.6
The microphone head of the sound level meter
and calibrator were cleaned with a soft cloth at quarterly intervals.
3.7
The sound level meter and calibrator were
checked and calibrated at yearly intervals.
3.8
Immediately prior to and following each
noise measurement the accuracy of the sound level meter was checked using an
acoustic calibrator generating a known sound pressure level at a known
frequency. Measurements were accepted as valid only if the calibration levels
from before and after the noise measurement agree to within 1.0 dB.
Results
and Observations
3.9
The data obtained from the impact monitoring
works completed by the ET of Agreement No. CE 59/2015 (EP) will be adopted in
this report.
3.10
No Action Level exceedance was recorded due
to the documented complaint in the reporting month.
3.11
No Limit Level exceedance was recorded for
day-time construction noise monitoring in the reporting month.
3.12
Noise monitoring results and graphical
presentations are shown in Appendix G.
3.13
According to field observations by ET for
Agreement No. CE 59/2015 (EP) in the reporting period, the major noise sources
identified at the noise monitoring stations are shown in Table 3.4.
Table 3.4 Other
Noise Source Identified during Noise Monitoring
|
Monitoring
Stations
|
Major Noise Source
|
|
CM1
|
Road Traffic near Eastern Cross
Harbour Tunnel Toll Plaza, non-project related construction activities
|
|
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
(November 2022),
Leq (30min) dB(A)
|
|
CM1 – Nga Lai House, Yau Lai Estate Phase 1, Yau Tong
|
N1102
|
73
|
74.8
|
|
CM2 – Bik Lai House, Yau Lai Estate Phase 1, Yau Tong
|
N1204
|
75
|
74.3
|
|
CM3 – Block S, Yau Lai Estate Phase 5, Yau Tong
|
N2105
|
75
|
73.5
|
|
CM4 – Tin Hau Temple, Cha Kwo Ling
|
N3101a
|
73
|
72.3
|
|
CM5 – CCC Kei Faat Primary School, Yau Tong
|
N4101
|
71
|
70.0
|
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 03, 10, 17 and 23 November 2022 in the reporting month. Site
inspection of the IEC was conducted on 24 November 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
|
23 Nov 2022
|
|
To be reported in the next reporting month.
|
|
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
|
10 Nov 2022
|
Drip tray which prevent the leaked oil from
entering drainage was not observed.
|
The oil
container was removed to avoid the oil leakage.
|
|
23 Nov 2022
|
Drip tray which prevent the leaked oil from
entering drainage was not observed.
|
To be reported in the next reporting month.
|
|
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
·
No Action Level exceedance was recorded due
to the documented complaint in the reporting month.
·
No Limit Level exceedance for construction
noise monitoring was recorded in the reporting month.
13.1
The summaries of environmental complaint,
warning, summon and notification of successful prosecution for the Project is
presented in Appendix M.
13.2
The summary of exceedance record in the
reporting month is shown in Appendix N.
14.1
Tentative construction programmes for the
next three months are provided in Appendix O.
14.2
Major site activities undertaken for the
coming months are summarized as follows:
·
East Bound –
RC Structure Construction, Service Gallery Frill & Blast. Service Gallery A
Installation
·
East Ventilation Building –
WB Blinding & Waterproofing, RC Structure
·
West Bound –
Extension & Blast Tunnel, RC Structure Construction
14.3
Key environmental issues in the coming
months include:
·
Make sure noise mitigation measures are
implemented accordingly;
·
Make sure drainage system is adequately
designed to prevent flooding during periods of heavy rain; and,
·
Make sure mitigation measure for dust
suppression are implemented on site.
14.4
The tentative environmental monitoring
schedule for the next month is shown in Appendix
D.
14.5
This is the 31th 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
No 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 No
environmental complaint was received in the reporting period. No notifications
of summons and successful prosecutions were received in the reporting month.
14.12 According
to the environmental audit performed in the reporting month, the following
recommendations were made:
Air quality:
·
The valid NRMM labels should be displayed at a conspicuous position on
PME.
Waste / Chemical Management
·
Drip tray should be
provided to prevent leaked oil from entering drainage system during handling of
chemical.
