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........... 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 for October 2022 |
|
|
|
|
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 55th
monthly EM&A Report presenting the EM&A works carried out during the
period between 1 and 31 October 2022. 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 ·
Excavation, base slab and tunnel wall
construction at At-grade Road |
|
Ma Tau Kok |
·
Temporary traffic management implementation; ·
Excavation at MTK C&C Tunnel ·
Decking and Excavation and lateral support installation at MTK C&C
Tunnel |
|
Kowloon Bay |
·
Road pavement and precast profile barrier installation at Stage 1 UWT ·
Temporary Reclamation at Stage 2 UWT ·
Modular strutting installation at Stage 2 UWT ·
Dredging of marine sediment 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
No exceedance of Limit level of noise was recorded in the reporting
month.
Complaint, Notification of Summons and Successful Prosecution
One (1) environmental complaint regarding odour
from construction machines was received and referred by the Contractor on 19
and 22 September 2022. The investigation
report was finalized on 11 October 2022.
No environmental related notification of summons and successful
prosecution were received in the reporting month.
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; - Precast profile barrier
installation at underpass, depressed road and C&C Tunnel; - Excavation, base slab and tunnel wall construction at At-grade Road |
|
Ma Tau Kok |
- Temporary traffic management implementation; - Excavation at MTK C&C Tunnel; - Decking and Excavation and
lateral support installation at MTK C&C Tunnel |
|
Kowloon Bay |
- Road pavement and precast
profile barrier installation at Stage 1 UWT; - Temporary Reclamation at
Stage 2 UWT; - Modular strutting
installation at Stage 2 UWT; - Dredging of marine sediment
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 55th monthly EM&A
Report which summaries the impact monitoring results and audit
findings for the Project during the reporting period between 1 and 31
October 2022.
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 ·
Excavation, base slab and tunnel wall
construction at At-grade Road |
|
Ma
Tau Kok |
·
Temporary traffic management implementation; ·
Excavation at MTK C&C Tunnel ·
Decking and Excavation and lateral support installation at MTK C&C
Tunnel |
|
Kowloon
Bay |
·
Road pavement and precast profile barrier installation at Stage 1 UWT ·
Temporary Reclamation at Stage 2 UWT ·
Modular strutting installation at Stage 2 UWT ·
Dredging of marine sediment 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. Jeffrey
Lau |
2268 3640 |
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 T Tang |
3922 9393 |
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 |
Valid |
General Works at Ma Tau Kok |
|
GW-RE0483-22 |
17 May 2022 |
15 Nov 2022 |
Valid |
General Works at Kai Tak |
|
GW-RE0825-22 |
21 Aug 2022 |
20 Dec 2022 |
Valid |
General Works at Stage 1 Underwater Tunnel |
|
GW-RE0585-22 |
17 Jun 2022 |
16 Oct 2022 |
Superseded by
GW-RE1101-22 |
General Works at Stage 2 Underwater Tunnel |
|
GW-RE1101-22 |
17 Oct 2022 |
16 Apr 2023 |
Valid |
|
|
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/23-003 |
12 Sep 2022 |
11 Oct 2022 |
Superseded by EP/MD/23-045 |
Sediments requiring
Type 1 (Dedicated Site) and Type 2 Confined Marine Disposal |
|
EP/MD/23-045 |
12 Oct 2022 |
11 Nov 2022 |
Valid |
|
|
EP/MD/23-038 |
14 Sep 2022 |
13 Oct 2022 |
Valid until 13 Oct 2022 |
Sediments requiring
Type 3 disposal (Filled up by 50%) |
|
Billing Account for Construction
Waste Disposal |
||||
|
7029909 |
22 Jan 2018 |
End of Project |
Account Active |
-- |
|
7031949 |
29 Aug 2022 |
28 Nov 2022 |
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 continuous particulate TEOM
Monitor, Series 1400ab. 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
October 2022 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 & 2250-L) |
|
|
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 October 2022 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 September 2022 |
14 October 2022 |
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 |
51.0 |
40.4 – 60.0 |
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 |
64.0 |
61.7 – 66.3 |
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 is 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 |
62.4
– 68.7 |
75 |
|
E-N21a |
60.1
– 69.9 |
75 |
5.2.2
No Action and Limit Level exceedance
for noise was recorded at all monitoring stations in the reporting month.
5.2.3
The event and action plan is 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 6,367 m3 of
inert C&D
material were generated and 3,226m3 of
C&D material was disposed to public fill, 3141 m3 of inert C&D was
reused in the Contract and no inert C&D was reused in other projects in the
reporting month. 102,610
kg of general
refuse was generated and sent to NENT Landfill in the
reporting month.
No metal, plastics and no paper/cardboard packaging were collected by recycle
contractor in the reporting month. No chemical waste was collected by licensed
contractor in the reporting month. 2327m3 of Type 2 marine
sediment were disposed at Confined Marine Disposal Facility to the East of Sha
Chau. No Type 1 and Type 3 Marine
sediment were disposed. 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 5 and 19 October 2022. 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 5, 12, 19 and 26 October 2022. Joint inspections with the IEC, ER, the Contractor
and ET were conducted on 12 October 2022. 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 |
12
Oct 2022 |
·
Haul road near the entrance of KT was observed in
dry condition. The Contractor was advised to provide watering to the exposed
area regularly. |
The
item was rectified by the Contractor on |
|
Noise |
Nil |
Nil |
Nil |
|
Water Quality |
Nil |
Nil |
Nil |
|
Waste/ Chemical Management |
5
Oct 2022 |
Reminder ·
The Contractor was reminded to fence the waste
storage area at C&C Tunnel. |
The item was rectified by the Contractor on |
|
12
Oct 2022 |
Reminder ·
The Contractor was reminded to maintain the silt curtain,
which located at the marine platform of stage 2, in proper condition to
ensure no silt will drop outside of the silt curtain. |
The item was rectified by the Contractor on |
|
|
26
Oct 2022 |
·
The oil duct floating on the sea was observed at the
marine platform of stage 2 The Contractor was advised to place the oil duct in proper location to
prevent accidental leakage. |
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
No Action and Limit Level
exceedance for noise 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
One (1) environmental complaint regarding odour from construction machines was received and
referred by the Contractor on 19 and 22 September 2022. The investigation report was finalized on 11
October 2022.
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 November 2022 to January 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; -
Excavation, Base slab and tunnel wall construction
at At-grade road. |
|
Ma
Tau Kok |
-
Temporary traffic management implementation; -
Excavation at MTK C&C Tunnel; -
Decking and Excavation and lateral support installation 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 of marine sediment at Stage 2 UWT. |