........... EXECUTIVE SUMMARY
2.......... Project Information
2.3 Construction Programme and Activities
2.5 Status of Environmental Licences, Notification and
Permits
3.......... Environmental
Monitoring Requirements
3.1 Construction Dust Monitoring
3.2 Construction Noise Monitoring
4.......... Implementation Status of Environmental
Mitigation Measures
5.......... Monitoring Results
5.1 Construction Dust Monitoring
5.2 Regular Construction Noise Monitoring
6.......... ENVIRONMENTAL SITE INSPECTION AND AUDIT
7.......... Environmental
Non-conformance
7.1 Summary of Monitoring Exceedances
7.2 Summary of Environmental Non-Compliance
7.3 Summary of Environmental Complaints
7.4 Summary of Environmental Summon and Successful
Prosecutions
8.1 Construction Programme for the Next Three Months
8.2 Key Issues for the Coming Month
8.3 Monitoring Schedule for the Coming Month
9.......... ConclusionS AND RECOMMENDATIONS
List of Tables
Table 2.1.......... Construction Activities in the reporting month
Table 2.2.......... Contact Information of Key
Personnel
Table 2.3.......... Status of Environmental
Licenses, Notifications and Permits
Table 3.1
........ Air
Quality Monitoring Equipment
Table 3.2
........ Location
of Construction Dust Monitoring Station
Table 3.3 ........ Noise Monitoring
Parameters, Frequency and Duration
Table 3.4
........ Noise
Monitoring Equipment for Regular Noise Monitoring
Table 3.5 ........ Noise Monitoring Stations
during Construction Phase
Table 3.6 ........ Noise Monitoring
Parameters, Frequency and Duration
Table 4.1.......... Status of Required Submission under Environmental
Permit
Table 5.1 ........ Summary of 24-hour TSP
Monitoring Result in the Reporting Period
Table 5.2 ........ Summary of 1-hour TSP
Monitoring Result in the Reporting Period
Table 5.3 ........ Summary of Construction
Noise Monitoring Results in the Reporting Period
Table 6.1 ........ Observations and
Recommendations of Site Audit
Table 8.1.......... Construction Activities in the coming three months
List of Figures
|
Site Layout Plan |
|
|
Location of Air Quality Monitoring Station |
|
|
Locations of Noise Monitoring Station |
|
|
|
|
List
of Appendices
|
Construction Programme |
|
|
Project Organization Structure |
|
|
Implementation Schedule of Environmental Mitigation Measures |
|
|
Summary of Action and Limit Levels |
|
|
Calibration Certificates of Equipment |
|
|
EM&A Monitoring Schedules |
|
|
Air Quality Monitoring Results and their Graphical Presentations |
|
|
Noise Monitoring Results and their Graphical Presentations |
|
|
Event and Action Plan Cumulative Statistics on Complaints, Notification of Summons and Successful
Prosecutions |
|
|
Monthly Summary Waste Flow Table Shatin to Central Link (Hung Hom – Admiralty
Section) Kai Tak Barging Facility under FEP-01/436/2012/F Monthly EM&A
Report |
|
|
|
|
EXECUTIVE SUMMARY
Central Kowloon Route – Kai Tak West (CKR-KTW; Contract No.
HY/2014/07) (hereafter called “the Project”) covers part of the construction of
the Central Kowloon Route (CKR).
The Project comprises
the follow works:
·
50x30m
access shaft with noise enclosure at Ma Tau Kok
(MTK);
·
100m long
cut-and-cover (C&C) tunnel at MTK;
·
Demolition
and re-provisioning of MTK Public Pier;
·
160m long
underwater tunnel (UWT) (Stage 1);
·
210m long
UWT (Stage 2);
·
60m long
C&C tunnel at Kai Tak;
·
130m long
depressed road and 200m long underpass at Kai Tak;
·
390m long
underground tunnel ventilation audit at Kai Tak;
·
Seawall
demolition and construction of new landing steps; and
·
Barging
Point enclosure and conveyor system.
The EM&A programme commenced on 4 April 2018.The impact EM&A for the Project includes air
quality and noise monitoring.
This is the 58th
monthly EM&A Report presenting the EM&A works carried out during the
period between 1 and 31 January 2023. As informed by the Contractor, major
activities in the reporting period were:
|
Locations |
Site Activities |
|
Kai Tak |
- Road pavement at underpass,
depressed road and C&C; - Precast profile barrier
installation at underpass, depressed road and C&C Tunnel; - Base slab, tunnel wall and
walkway construction at At-grade Road; - Stitch joint construction at
underpass, depressed road and C&C Tunnel. |
|
Ma Tau Kok |
- Temporary traffic management
(TTM) implementation; - Excavation at MTK C&C
Tunnel; - Decking and Excavation and
Lateral Support (ELS) installation at MTK C&C Tunnel; - Pumping Test at MTK C&C Tunnel. |
|
Kowloon Bay |
- Road pavement at Stage 1 UWT; - Temporary Reclamation at
Stage 2 UWT; - Modular strutting
installation at Stage 2 UWT; - Dredging/ Excavation of
marine sediment at Stage 2 UWT; - Pumping Test at Stage 2 UWT |
Breaches of Action and Limit Levels for Air Quality
All 24-hour TSP result was below the Action and Limit Levels at all
monitoring locations in the reporting month.
All 1-hour TSP result was below the Action and Limit Levels at all
monitoring locations in the reporting month.
Breaches of Action and Limit Levels for Noise
Regular Noise Monitoring
One (1) action level exceedance was recorded regarding to complaint on
noise nuisance received in the reporting month. No limit level exceedance was
recorded at all monitoring stations in the reporting month.
Complaint, Notification of Summons and Successful Prosecution
Five (5) complaints
were received in the reporting month (January 2023) and the investigation was
provided in the current reporting month (January 2023).
Reporting Changes
No report changes in the reporting period.
Future Key Issues
Key issues to be
considered in the next three months included:
|
Locations |
Site Activities |
|
Kai Tak |
- Road Pavement at underpass,
depressed road and C&C; - Stitch joint construction at
underpass, depressed road and C&C Tunnel; - Tunnel wall and walkway
construction at At-grade road. |
|
Ma Tau Kok |
- TTM implementation; - Excavation at MTK C&C
Tunnel; - Decking and ELS installation
at MTK C&C Tunnel; |
|
Kowloon Bay |
- Road pavement at Stage 1 UWT; - Modular strutting
installation at Stage 2 UWT - Excavation at Stage 2 UWT. |
Potential environmental
impacts arising from the above construction activities are mainly associated with construction dust, construction noise, water pollution control, and
waste management.
1
INTRODUCTION
Gammon Construction Limited was
commissioned by the Highways Department as the Civil Contractor for Works
Contract HY/2014/07. AECOM Asia Company Limited (AECOM) was appointed by Gammon
Construction Limited as the Environmental Team (ET) to undertake the
Environmental Monitoring and Audit (EM&A) programme
during construction phase of the Project.
1.1 Purpose of the Report
1.1.1
This is the 58th monthly EM&A Report which summaries the impact
monitoring results and audit findings for the Project during the reporting
period between 1 and 31 January 2023.
1.2 Report Structure
1.2.1
This monthly
EM&A Report is organized as follows:
·
Section 1: Introduction
·
Section 2:
Project Information
·
Section 3:
Environmental Monitoring Requirement
·
Section 4:
Implementation Status of Environmental Mitigation Measures
·
Section 5:
Monitoring Results
·
Section 6:
Environmental Site Inspection and Audit
·
Section 7: Environmental Non-conformance
·
Section 8:
Future Key Issues
·
Section 9:
Conclusions and Recommendations
2
Project Information
2.1 Background
2.1.1
CKR is a dual
3-lane trunk road across central Kowloon linking the West Kowloon in the west
and the Kai Tak Development (KTD) in the east. The CKR will be about 4.7 km
long with an underground tunnel section of about 3.9 km long, in particular,
there will be an underwater tunnel of about 370 m long in Kowloon Bay to the
north of the To Kwa Wan Typhoon Shelter. It will connect the West Kowloon
Highway at Yau Ma Tei Interchange with the road
network at Kowloon Bay and the future Trunk Road T2 at KTD which will connect
to the future Tseung Kwan O – Lam Tin Tunnel (TKO-LTT) and Cross Bay Link
(CBL). CKR, Trunk Road T2 and TKO-LTT will form a strategic highway link,
namely Route 6, connecting West Kowloon and Tseung Kwan O. In addition, 3
ventilation buildings, which will be located in Ya Ma
Tei, Ho Man Tin and ex-Kai Tak airport area, are
proposed to ensure acceptable air quality within the tunnel.
2.1.2
The Environmental
Impact Assessment (EIA) Report for Central Kowloon Route (Register No.: AEIAR-171/2013)
was approved on 11 July 2013 under the Environmental Impact Assessment
Ordinance (EIAO). Following the approval of the EIA Report, an Environmental
Permit (EP) for CKR was granted on 9 August 2013 (EP No.: EP- 457/2013) for the
construction and operation. Variation of EP (VEP) was subsequently applied
and the latest EP (EP No. EP-457/2013/D) was issued by the Director of Environmental
Protection (DEP) on 15 June 2021. Further Environmental Permit (EP No.
FEP-01/457/2013/C) for CKR – Kai Tak West was issued on 28 February 2018.
2.1.3
The construction
of the CKR had been divided into different sections. This Work Contract
HY/2014/07 – Kai Tak West (KTW) (“The Project”) will include a road which is a
trunk road, including new roads, and major extensions or improvements to
existing roads; a road fully enclosed by decking above and by structure on the
sides for more than 100 m; and reclamation works (including associated dredging
works) more than 1 ha in size and a boundary of which is less than 100 m from
an existing residential area.
2.1.4
The site layout
plan of the Project is shown in Figure 1.1.
2.2 Site Description
2.2.1
The major
construction activities under this Project include:
(a)
construction of approximately 160m long
cut-and-cover tunnel and 370m long underwater tunnel between the tunnel section
at Ma Tau Kok and the depressed road of the CKR
within Kai Tak Development;
(b)
reconstruction of the seawall at Ma Tau
Kok public pier, and the sloping seawall at the
Former Kai Tak Airport Runway;
(c)
construction of approximately 125m long
depressed road and 200m long underpass of the CKR within Kai Tak Development;
(d)
construction of approximately 360m long
underground tunnel ventilation adit of the CKR;
(e)
reconstruction of Kowloon City Ferry
Pier Public Transport Interchange; and
(f)
other associated works.
2.3 Construction Programme and Activities
2.3.1
The major
construction activities undertaken in the reporting month are summarized in Table
2.1.
Table 2.1 Construction Activities in the reporting month
|
Locations |
Site Activities |
|
Kai
Tak |
-
Road pavement at underpass, depressed road and C&C; -
Precast profile barrier installation at underpass, depressed road and C&C
Tunnel; -
Base slab, tunnel wall and walkway construction at At-grade Road; -
Stitch joint construction at underpass, depressed road and C&C Tunnel. |
|
Ma
Tau Kok |
- Temporary
traffic management (TTM) implementation; -
Excavation at MTK C&C Tunnel; -
Decking and Excavation and Lateral Support (ELS) installation at MTK C&C
Tunnel; -
Pumping Test at MTK C&C Tunnel. |
|
Kowloon
Bay |
-
Road pavement at Stage 1 UWT; -
Temporary Reclamation at Stage 2 UWT; -
Modular strutting installation at Stage 2 UWT; -
Dredging/ Excavation of marine sediment at Stage 2 UWT; -
Pumping Test at Stage 2 UWT |
2.3.2
The construction programme is presented in Appendix
A.
2.4 Project Organization
2.4.1
The project
organization structure is shown in Appendix B. The key personnel contact names and
numbers for the Project are summarized in Table
2.2.
Table 2.2 Contact Information of Key Personnel
|
Party |
Role |
Position |
Name |
Telephone |
Fax |
|
Arup-Mott
MacDonald Joint Venture |
Residential
Engineer (ER) |
Engineer’s
Representative |
Mr. Patrick Lo |
36195901 |
2268 3954 |
|
ERM |
Independent
Environmental Checker (IEC) |
Independent
Environmental Checker |
Ms. Mandy To |
2271 3113 |
3015 8052 |
|
Gammon |
Contractor |
Contracts Manager |
Mr. Kin Fai Tam |
2516 8823 |
2516 6260 |
|
Environmental Manager |
Ms. Michelle Tang |
9267 8866 |
2516 6260 |
||
|
AECOM |
Contractor’s
Environmental Team (ET) |
ET Leader |
Mr. Y. W. Fung |
3922 9366 |
2317 7609 |
2.5 Status of Environmental Licences, Notification and Permits
2.5.1
Relevant environmental
licenses, permits and/or notifications on environmental protection for this
Project and valid in the reporting month are summarized in Table
2.3.
Table 2.3 Status of Environmental Licenses, Notifications and Permits
|
Permit / License No. / Notification/
Reference No. |
Valid Period |
Status |
Remarks |
|
|
|
From |
To |
|
|||
|
Further Environmental Permit |
|||||
|
FEP-01/457/2013/C |
28 Feb 2018 |
End of Project |
Valid |
-- |
|
|
Wastewater Discharge License |
|||||
|
WT00030290-2018 |
22 Mar 2018 |
31 May 2023 |
Valid |
Ma Tau Kok |
|
|
WT00030668-2018 |
27 Apr 2018 |
30 Apr 2023 |
Valid |
Site Office at Kai Tak West |
|
|
WT00030358-2018 |
27 Apr 2018 |
30 Apr 2023 |
Valid |
Kai Tak West |
|
|
WT00030330-2018 |
27 Apr 2018 |
30 Apr 2023 |
Valid |
Kowloon Bay |
|
|
Construction Noise Permit |
|||||
|
GW-RE0736-22 |
1 Aug 2022 |
30 Jan 2023 |
Superseded by EP/MD/23-088 |
General Works at Ma Tau Kok |
|
|
GW-RE0032-23 |
31 Jan 2023 |
30 Mar 2023 |
Valid |
|
|
|
GW-RE1237-22 |
28 Nov 2022 |
19 May 2023 |
Valid |
General Works at Kai Tak |
|
|
GW-RE1335-22 |
21 Dec 2022 |
20 Jun 2023 |
Valid |
General Works at Stage 1 Underwater Tunnel |
|
|
GW-RE1101-22 |
17 Oct 2022 |
16 Apr 2023 |
Valid |
General Works at Stage 2 Underwater Tunnel |
|
|
GW-RE0766-22 |
3 Aug 2022 |
2 Feb 2023 |
Valid |
General Works at KT Barging Facility (KTW) |
|
|
Chemical
Waste Producer Registration |
|||||
|
5118-247-G2347-47 |
30 Jan 2018 |
End of Project |
Valid |
-- |
|
|
5118-247-G2347-48 |
30 Jan 2018 |
End of Project |
Valid |
-- |
|
|
Marine Dumping Permit |
|||||
|
EP/MD/23-046 |
21-Nov-2022 |
28-Feb-2023 |
Valid |
Sediments
requiring Type 1 - Open Sea Disposal |
|
|
EP/MD/23-072 |
12 Dec 2022 |
11 Jan 2023 |
Superseded by EP/MD/23-088 |
Sediments requiring
Type 1 (Dedicated Site) and Type 2 Confined Marine Disposal |
|
|
EP/MD/23-088 |
12 Jan 2023 |
11 Feb 2023 |
Valid |
|
|
|
Billing Account for Construction
Waste Disposal |
|||||
|
7029909 |
22 Jan 2018 |
End of Project |
Account Active |
-- |
|
|
7031949 |
29 Nov2022 |
28 Feb 2023 |
Account Active |
Billing Account for Disposal of Construction Waste (by
vessels) |
|
|
Notification Under Air Pollution
Control (Construction Dust) Regulation |
|||||
|
429442 |
5 Jan 2018 |
5 Jul 2025 |
Notified |
-- |
|
|
|
|||||
3
Environmental Monitoring Requirements
3.1 Construction Dust Monitoring
Monitoring Requirements
3.1.1
In accordance
with the approved EM&A Manual, measurement of 24-hour and 1-hour Total
Suspended Particulates (TSP) level at the designated air quality monitoring
station is required. Impact 24-hour TSP monitoring should be carried out for at
least once every 6 days, and 1-hour TSP monitoring should be done at least 3
times every 6 days while the highest dust impact is expected. The Action and
Limit Levels of the air quality monitoring is provided in Appendix
D.
Monitoring Equipment
3.1.2
24-hour TSP air
quality monitoring was performed using High Volume Sampler (HVS) located at the
designated monitoring station. The HVS meets all the requirements of the
EM&A Manual.
3.1.3
A portable direct
reading dust meter was used to carry out the 1-hour TSP monitoring.
3.1.4
Brand and model
of the equipment is given in Table
3.1.
Table 3.1 Air Quality Monitoring Equipment
|
Tisch
Total Suspended Particulate Mass Flow Controlled High Volume Air Sampler |
|
|
Calibration
Kit (24-hour
TSP) |
TISCH
Environmental Orifice |
|
Portable
direct reading dust meter |
Sibata Digital Dust Monitor |
Monitoring Locations
3.1.5
The monitoring
station for construction dust monitoring pertinent to the Project has been
identified based on the approved EM&A Manual for the Project. The location of the construction dust
monitoring station is summarized in Table
3.2 and shown in Figure 3.1.
Table 3.2 Location of Construction Dust Monitoring Station
|
Location |
Monitoring Station |
Description |
|
E-A14a
[1] |
Block
B of Merit Industrial Centre |
Rooftop
(13/F) |
[1] The air monitoring station
proposed in the EM&A Manual (i.e. Wyler Gardens with ID: E-A14) was not
available for impact dust monitoring, therefore impact monitoring was conducted
at E-A14a as an alternative which was agreed by the ER, IEC and EPD.
Monitoring
Methodology
3.1.6
24-hour TSP
Monitoring
(a)
The HVS
was installed in the vicinity of the air sensitive receivers. The following criteria were considered in the
installation of the HVS as far as practicable: -
(i)
A horizontal platform with
appropriate support to secure the sampler against gusty wind was provided.
(ii)
Two samplers should
not be placed less than 2m apart from each other;
(iii)
The distance between the HVS and
any obstacles, such as buildings, was at least twice the height that the
obstacle protrudes above the HVS.
(iv)
A minimum of 2 meters separation
from walls, parapets and penthouse for rooftop sampler.
(v)
A minimum of 2 meters separation
from any supporting structure, measured horizontally is required.
(vi)
No furnace or incinerator flues
nearby.
(vii)
Airflow around the sampler was
unrestricted.
(viii)
The sampler was located more than
20 meters from any dripline.
(ix)
Any wire fence and gate, required
to protect the sampler, did not obstruct the monitoring process.
(x)
Permission was obtained to set up
the samplers and access to the monitoring station.
(xi)
A secured supply of electricity
was obtained to operate the sampler.
(b)
Preparation
of Filter Papers
(i)
Glass fibre filters, G810 were
labelled and sufficient filters that were clean and without pinholes were
selected.
(ii)
All filters were equilibrated in
the conditioning environment for 24 hours before weighing. The conditioning
environment temperature was around 25 °C and not variable by more than ±3 °C;
the relative humidity (RH) was < 50% and not variable by more than ±5%. A
convenient working RH was 40%.
(iii)
All filter papers were prepared
and analysed by ALS Technichem (HK) Pty Ltd., which is a HOKLAS accredited
laboratory and has comprehensive quality assurance and
quality control programmes.
(c)
Field
Monitoring
(i)
The power
supply was checked to ensure the HVS works properly.
(ii)
The filter holder and the area
surrounding the filter were cleaned.
(iii)
The filter holder was removed by
loosening the four bolts and a new filter, with stamped number upward, on a
supporting screen was aligned carefully.
(iv)
The filter was properly aligned
on the screen so that the gasket formed an airtight seal on the outer edges of
the filter.
(v)
The swing bolts were fastened to
hold the filter holder down to the frame.
The pressure applied was sufficient to avoid air leakage at the edges.
(vi)
Then the shelter lid was closed
and was secured with the aluminium strip.
(vii)
The HVS was warmed-up for about 5
minutes to establish run-temperature conditions.
(viii)
A new flow rate record sheet was
set into the flow recorder.
(ix)
On site temperature and
atmospheric pressure readings were taken and the flow rate of the HVS was
checked and adjusted at around 1.3 m3/min, and complied with the
range specified in the EM&A Manual (i.e. 0.6-1.7 m3/min).
(x)
The programmable digital timer
was set for a sampling period of 24 hrs, and the starting time, weather
condition and the filter number were recorded.
(xi)
The initial elapsed time was
recorded.
(xii)
At the end of sampling, on site
temperature and atmospheric pressure readings were taken and the final flow
rate of the HVS was checked and recorded.
(xiii)
The final elapsed time was
recorded.
(xiv)
The sampled filter was removed
carefully and folded in half length so that only
surfaces with collected particulate matter were in contact.
(xv)
It was then placed in a clean
envelope and sealed.
(xvi)
All monitoring information was
recorded on a standard data sheet.
(xvii)
Filters were then sent to ALS Technichem (HK)
Pty Ltd. for analysis.
(d)
Maintenance
and Calibration
(i)
The HVS and its accessories were maintained in good working condition, such as
replacing motor brushes routinely and checking electrical wiring to ensure a
continuous power supply.
(ii)
HVSs were calibrated using
TE-5025A Calibration Kit upon installation and thereafter at bi-monthly
intervals.
(iii)
Calibration certificate of the TE-5025A Calibration Kit and the HVSs are provided in
Appendix E.
3.1.7
1-hour TSP
Monitoring
(a)
Measuring Procedures
The measuring procedures of the 1-hour dust meter are in accordance with
the Manufacturer’s Instruction Manual as follows:
(i)
Turn the power on.
(ii)
Close the air collecting opening cover.
(iii)
Push the “TIME SETTING” switch to [BG]
(iv)
Push “START/STOP”
switch to perform background measurement for 6 seconds.
(v)
Turn the knob at SENSI ADJ position to insert
the light scattering plate.
(vi)
Leave the equipment for 1 minute upon “SPAN
CHECK” is indicated in the display.
(vii)
Push “START/STOP” switch to perform automatic
sensitivity adjustment. This measurement takes 1 minute.
(viii)
Pull out the knob and return it to MEASURE
position.
(ix)
Push the “TIME SETTING” switch the time set
in the display to 3 hours.
(x)
Lower down the air collection opening cover.
(xi)
Push “START/STOP” switch to start
measurement.
(b)
Maintenance and
Calibration
(i)
The 1-hour TSP meter
was calibrated at 1-year intervals against a High Volume Samplers. Calibration certificates of the Laser Dust Monitors are provided in Appendix E.
Monitoring Schedule for the
Reporting Month
3.1.8
The schedule for
environmental monitoring in January 2023 is provided in Appendix
F.
3.2 Construction Noise Monitoring
Monitoring Requirements
3.2.1
In accordance
with the EM&A Manual, impact noise monitoring should be conducted for at
least once a week during the construction phase of the Project. Table
3.3 summarizes the monitoring parameters, frequency
and duration of impact noise monitoring. The Action and Limit Levels of the
noise monitoring is provided in Appendix D.
Table 3.3 Noise Monitoring Parameters, Frequency and Duration
|
Parameter and Duration |
Frequency |
|
30-mins
measurement at each monitoring station between 0700 and 1900 on normal
weekdays. Leq, L10 and L90
would be recorded. |
At least once per week |
3.2.2
Noise monitoring
was performed using sound level meter at each designated monitoring
station. The sound level meters deployed
comply with the International Electrotechnical Commission Publications (IEC)
651:1979 (Type 1) and 804:1985 (Type 1) specifications. Acoustic calibrator was deployed to check the
sound level meters at a known sound pressure level. Brand and model of the equipment is given in Table
3.4.
Table 3.4 Noise Monitoring Equipment for Regular Noise Monitoring
|
B&K (Model No. 2250, 2250L& 2270) |
|
|
Acoustic
Calibrator |
Rion (Model No.
NC-74) & B&K (Model No. 4231) |
Monitoring Locations
3.2.3
The monitoring
stations for construction noise monitoring pertinent to the Project have been
identified based on the approved EM&A Manual for the Project. Locations of the noise monitoring stations are
summarized in Table
3.5 and shown in Figure
3.2.
Table 3.5 Noise Monitoring Stations during Construction Phase
|
Location |
Monitoring Station |
Description |
Measurement |
|
E-N12a [1] |
19 Hing Yan Street |
Rooftop (9/F) |
Façade |
|
E-N21a [1] |
Block B of Merit Industrial Centre |
Rooftop (13/F) |
Free field[2] |
Notes:
[1] The noise monitoring stations proposed in the
EM&A Manual (i.e. Grand Waterfront Tower 3 with ID: E-N12 and Hang Chien Court Block J with ID: E-N21) were not available for
impact noise monitoring, therefore impact monitoring was conducted at E-N12a
and E-N21a as an alternative which was
agreed by the ER, IEC and EPD.
[2] A
correction of +3 dB(A) was made to the free field measurements.
Monitoring Parameters, Frequency and Duration
3.2.4
Table 3.6 summarizes the monitoring parameters,
frequency and duration of impact noise monitoring.
Table 3.6 Noise Monitoring Parameters, Frequency and Duration
|
Location |
Parameter and Duration |
Frequency |
|
E-N12a
and E-N21a |
30-mins measurement at each
monitoring station between 0700 and 1900 on normal weekdays. Leq, L10 and L90 would
be recorded. |
At
least once per week |
Monitoring Methodology
3.2.5
Monitoring
Procedure
(a)
The sound level meter was set on
a tripod at a height of 1.2 m above the ground.
(b)
Façade measurement was made at E-N12a.
(c)
Free field measurements was made
at monitoring location E-N21a. A correction of +3 dB(A) shall be made to the
free field measurements.
(d)
The battery condition was checked to ensure the correct
functioning of the meter.
(e)
Parameters such as frequency
weighting, the time weighting and the measurement time were set as follows:
(i)
frequency weighting
(ii)
time weighting: Fast
(iii)
time measurement: Leq(30-minutes) during non-restricted
hours i.e. 0700 – 1900 on normal weekdays.
(f)
Prior to and after each noise
measurement, the meter was calibrated using the acoustic calibrator for 94
dB(A) at 1000 Hz. If the difference in
the calibration level before and after measurement was more than 1 dB(A), the
measurement would be considered invalid and repeat of noise measurement would
be required after re-calibration or repair of the equipment.
(g)
During the monitoring period, the
Leq, L10 and L90
were recorded. In addition, site
conditions and noise sources were recorded on a standard record sheet.
(h)
Noise measurement was paused
during periods of high intrusive noise (e.g. dog barking, helicopter noise) if
possible. Observations were recorded when intrusive noise was unavoidable.
(i)
Noise monitoring was cancelled in
the presence of fog, rain, wind with a steady speed exceeding 5m/s, or wind
with gusts exceeding 10m/s.
3.2.6
Maintenance and
Calibration
(a)
The
microphone head of the sound level meter was cleaned with soft
cloth at regular intervals.
(b)
The meter
and calibrator were sent to the supplier or HOKLAS laboratory to check and
calibrate at yearly intervals.
(c)
Calibration
certificates of the sound level meters and acoustic calibrators are
provided in Appendix E.
Monitoring
Schedule for the Reporting Month
3.2.7 The schedule for
environmental monitoring in January 2023 is provided in Appendix F.
3.3
Landscape and Visual
3.3.1 As per the EM&A Manuals, the landscape and visual mitigation
measures shall be implemented and site inspections should be undertaken once
every two weeks during the construction period. A summary of the implementation
status is presented
in Section 6.
4
Implementation Status of Environmental Mitigation Measures
4.1.1
The
Contractor has implemented environmental mitigation measures and requirements
as stated in the EIA Reports, the EP and EM&A Manuals. The implementation
status of the environmental mitigation measures during the reporting period is
summarized in Appendix C. Status of required submissions under the EP
during the reporting period is summarised in Table 4.1.
Table 4.1 Status of Required Submission under Environmental Permit
|
EP Condition |
Submission |
Submission
Date |
|
Condition 3.4 of |
Monthly EM&A Report
for December 2022 |
14 January 2023 |
5
Monitoring Results
5.1 Construction Dust Monitoring
5.1.1 The monitoring results for 24-hour TSP and 1-hour TSP are summarized in Table 5.1 and Table 5.2 respectively. Detailed air quality monitoring results and daily extract of meteorological observations are presented in Appendix G.
Table 5.1 Summary of 24-hour
TSP Monitoring Result in the Reporting Period
|
ID |
Average (mg/m3) |
Range (mg/m3) |
Action Level (mg/m3) |
Limit Level (mg/m3) |
|
E-A14a |
44.4 |
18.4 – 63.6 |
197.3 |
260 |
Table 5.2 Summary of 1-hour TSP Monitoring Result in the Reporting Period
|
ID |
Average (mg/m3) |
Range (mg/m3) |
Action Level (mg/m3) |
Limit Level (mg/m3) |
|
E-A14a |
60.2 |
57.4
– 63.4 |
302.4 |
500 |
5.1.2
No Action and Limit Level exceedance was recorded
for 24-hour TSP monitoring at the monitoring
location in the reporting month.
5.1.3 No Action and
Limit Level exceedance was recorded for 1-hour TSP monitoring at the monitoring location in the reporting month.
5.1.4 The event and action
plan are annexed in Appendix I.
5.1.5
Major dust
sources during the monitoring included construction dust and nearby traffic
emission.
5.2 Regular Construction Noise Monitoring
5.2.1
The
monitoring results for noise are summarized in Table 5.3 and the monitoring data is provided in Appendix
H.
Table 5.3 Summary of Construction Noise Monitoring Results in the Reporting Period
|
ID |
Range, dB(A), Leq (30 mins) |
Limit Level, dB(A), Leq (30 mins) |
|
E-N12a |
66.1
– 68.5 |
75 |
|
E-N21a |
60.3
– 65.1 |
75 |
5.2.2 One (1) action level
exceedance was recorded regarding to complaint on noise nuisance received in
the reporting month. No limit level exceedance was recorded at all monitoring
stations in the reporting month.
5.2.3 The event and action
plan are annexed in Appendix I.
5.2.4 Major noise sources during the monitoring included construction noise from the Project site and nearby traffic noise.
5.3 Waste Management
5.3.1 C&D materials and wastes sorting were carried
out on site. Receptacles were available for C&D wastes and general refuse collection.
5.3.2 As advised by the Contractor, total 7,733 m3 of inert
C&D material were generated
and 7,733 m3 of C&D material was
disposed to public fill, no inert C&D was reused in the Contract and no other projects
respectively in the reporting month.84,540 kg
of general refuse was generated and
sent to NENT Landfill in
the reporting month. No metal, plastics and paper/cardboard
packaging were collected by recycle contractor in the reporting month. No chemical
waste was collected by licensed contractor in the reporting month. 8,633 m3 of Type 1, 5,057 m3
of Type 2 and
no Type 3 Marine sediment were disposed at Confined Marine Disposal Facility to
the East of Sha Chau. The waste flow table is annexed in Appendix K.
5.3.3
The Contractor
is advised to properly maintain on site C&D materials and wastes
collection, sorting and recording system and maximize reuse / recycle of
C&D materials and wastes. The Contractor is reminded to properly maintain
the site tidiness and dispose of the wastes accumulated on site regularly and
properly.
5.3.4
The Contractor
is reminded that chemical waste containers should be properly treated and
stored temporarily in designated chemical waste storage area on site in
accordance with the Code of Practice on the Packaging, Labelling and Storage of
Chemical Wastes.
5.4
Landscape and Visual
5.4.1 Bi-weekly inspection of the
implementation of landscape and visual mitigation measures was conducted on 11 and
26 January 2023. A summary of the site inspection is provided in Appendix C. The observations and
recommendations made during the site inspections are presented in Table 6.1.
6
ENVIRONMENTAL SITE INSPECTION AND AUDIT
6.1.1
Site inspections were carried out on a weekly basis to
monitor the implementation of proper environmental pollution control and
mitigation measures for the Project. A summary of the mitigation measures
implementation schedule is provided in Appendix C.
6.1.2 In the reporting month, 4 site
inspections were carried out on 4, 11, 18 and 26 January 2023. Joint inspections with the IEC, ER, the Contractor and ET were
conducted on 18 January 2023. No non-compliance was recorded during the site
inspection. Details of observations recorded during the site inspections are
presented in Table 6.1.
Table 6.1 Observations and Recommendations of Site Audit
|
Parameters |
Date |
Observations and Recommendations |
Follow-up |
|
Air Quality |
Nil |
Nil |
Nil |
|
Noise |
18
Jan 2023 |
Observation ·
The excavator at MTK was
observed missing covering the acoustic sheet. The Contractor was advised to
ensure the acoustic sheet should be covering to all PMEs to reduce noise. |
The item was rectified by the Contractor on |
|
Water Quality |
4
Jan 2023 |
Observation · The oil/ grease was observed floating on the sea at the
intorier of the silt curtain at marine plaform stage 2. The contractor was
advised to ensure remove the oil/ grease and keep clean to prevent marine
pollution. |
The item was rectified by the Contractor on |
|
18
Jan 2023 |
Observation The bad condition of the tarpaulin sheet was observed using in the soil
dumping operation.The Contractor was advised to ensure using good condition
tarpauline sheet to prevent accidential soil dropping into the sea and cause
marine pollution. |
The item was rectified by the Contractor on |
|
|
Waste/ Chemical Management |
4
Jan 2023 |
Observation ·
The chemical containers
were observed locating on the ground without drip tray at MTK. The contractor
was advised to ensure the chemical containers should be placing in the drip
tray. |
The item was rectified by the Contractor on |
|
11
Jan 2023 |
Observation ·
The chemical containers
were observed locating on the ground without drip tray at Underpass Tunnel
and Stockpile Area. The Contractor was advised to ensure the chemical
containers should be placing in the drip tray. |
The item was rectified by the Contractor on |
|
|
Landscape & Visual |
Nil |
Nil |
Nil |
|
Permits/ Licenses |
Nil |
Nil |
Nil |
6.1.3 All follow-up actions requested by
Contractor's ET during the site inspection were undertaken as reported by the
Contractor and confirmed in the following weekly site inspection conducted during the reporting
period.
7 Environmental Non-conformance
7.1 Summary of Monitoring Exceedances
7.1.1 All 24-hour TSP result
was below the Action and Limit Levels at all monitoring locations in the
reporting month.
7.1.2 All 1-hour TSP result
was below the Action and Limit Levels at all monitoring locations in the
reporting month
7.1.3 One (1) action level exceedance
was recorded regarding to complaints on noise nuisance received in the
reporting month. No limit level exceedance was recorded at all monitoring
stations in the reporting month.
7.2 Summary of Environmental Non-Compliance
7.2.1 No environmental
non-compliance was recorded in the reporting month.
7.3 Summary of Environmental Complaints
7.3.1 Five (5) complaints were
received in the reporting month (January 2023) and the investigation were provided in
the current reporting month (January 2023). Cumulative statistics on environmental complaint is
provided in Appendix J.
7.4 Summary of Environmental Summon and Successful Prosecutions
7.4.1
No
environmental related prosecution or notification of summons was received in
the reporting month. Cumulative statistics on notification of summons and
successful prosecutions is provided in Appendix J.
8
FUTURE KEY ISSUES
8.1 Construction Programme for the Next Three Months
8.1.1 The major construction
works between February 2023 to April 2023 are provided in Table 8.1.
Table 8.1 Construction Activities in the coming three months
|
Locations |
Site Activities |
|
Kai
Tak |
-
Road Pavement at underpass, depressed road and C&C; -
Stitch joint construction at underpass, depressed road and C&C Tunnel; -
Tunnel wall and walkway construction at At-grade road. |
|
Ma
Tau Kok |
-
TTM implementation; - Excavation
at MTK C&C Tunnel; -
Decking and ELS installation at MTK C&C Tunnel; |
|
Kowloon
Bay |
-
Road pavement at Stage 1 UWT; -
Modular strutting installation at Stage 2 UWT -
Excavation at Stage 2 UWT. |