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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 June 2021 |
|
|
Proactive Environmental Proforma |
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 adit 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
thirty-ninth monthly EM&A Report presenting the EM&A works carried out
during the period between 1 and 30 June 2021. As informed by the Contractor,
major activities in the reporting period were:
|
Locations |
Site Activities |
|
Kai Tak |
·
Casting tunnel wall at underpass and ventilation adit; ·
Wall and roof slab construction at cut & cover,
underpass and depressed road; ·
Backfilling at Underpass and depressed road; ·
Removal of ELS at cut & cover, underpass and depressed
road. |
|
Ma Tau Kok |
·
TTM implementation; ·
Trial trench for piling works; ·
Pre-grouting works for pipe piling works for MTK C&C
Tunnel; ·
Pipe piling works for MTK C&C tunnel; ·
Demolition of Kowloon City Public Pier; ·
Temporary storm dain diversion works. |
|
Kowloon Bay |
·
Waterproofing application at Stage 1 UWT; ·
Backfilling and ELS Removal at Stage 1 UWT; ·
Pipe Piling works for 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 Action and Limit Level of noise was
recorded in the reporting month.
Complaint, Notification of Summons and Successful Prosecution
No environmental related complaints,
notification of summons and successful prosecution were received
in the reporting month.
Reporting Changes
According to Section 14.3 of the EM&A Manual, at times during the construction phase the Contractor may submit method statements for various aspects of construction. This state of affairs would only apply to those construction methods that the EIA has not imposed conditions while for construction methods that have been assessed in the EIA, the Contractor is bound to follow the requirements and recommendations in the EIA study. The Contractor’s options for alternative construction methods may introduce adverse environmental impacts into the Project. It is the responsibility of the Contractor and ET, in accordance with established standards, guidelines and EIA study recommendations and requirements, to review and determine the adequacy of the environmental protection and pollution control measures in the Contractor’s proposal in order to ensure no unacceptable impacts would result. To achieve this end, the ET shall provide a copy of the Proactive Environmental Protection Proforma to the IEC for approval. The IEC should audit the review of the construction method and endorse the proposal on the basis of no adverse environmental impacts.
To achieve this end, the copy of the Proactive Environmental
Protection Proforma is provided in Appendix M.
Future Key Issues
Key issues to be
considered in the next three months included:
|
Locations |
Site Activities |
|
Kai Tak |
·
Wall and roof slab construction at cut & cover,
underpass and depressed road; ·
Backfilling works and ELS removal at cut & cover,
underpass and depressed road; ·
Dismantle of working platform. |
|
Ma Tau Kok |
·
TTM implementation; ·
Pre-grouting works for pipe piling works of MTK C&C
Tunnel ·
Pipe piling works for cut and cover tunnel; ·
Temporary storm drain diversion works. |
|
Kowloon Bay |
·
Backfilling and ELS removal works at Stage 1 UWT; ·
Waterproofing application at Stage 1 UWT; ·
Seawall Reinstatement at Stage 1 UWT; ·
Pipe piling and other preparation works for 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 thirty-ninth monthly EM&A Report which summaries the impact
monitoring results and audit findings for the Project during the reporting
period between 1 and 30 June 2021.
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 EPs (VEP) were
subsequently applied and the EPs (EP No. EP-457/2013/C and EP- 457/2013/D) were issued by the Director of Environmental
Protection (DEP) on 16 January 2017 and 15 June 2021 respectively. 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 |
·
Casting tunnel wall at underpass and ventilation adit; ·
Wall and roof slab construction at cut & cover,
underpass and depressed road; ·
Backfilling at Underpass and depressed road; ·
Removal of ELS at cut & cover, underpass and depressed
road. |
|
Ma
Tau Kok |
·
TTM implementation; ·
Trial trench for piling works; ·
Pre-grouting works for pipe piling works for MTK C&C
Tunnel; ·
Pipe piling works for MTK C&C tunnel; ·
Demolition of Kowloon City Public Pier; ·
Temporary storm dain diversion works. |
|
Kowloon
Bay |
·
Waterproofing application at Stage 1 UWT; ·
Backfilling and ELS Removal at Stage 1 UWT; ·
Pipe Piling works for 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 3313 |
2723 5660 |
|
Gammon |
Contractor |
Contracts Manager |
Mr. Alan Yan |
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-RE0355-21 |
4 May 2021 |
3 Aug 2021 |
Valid |
General Works at Ma Tau
Kok |
|
GW-RE0012-21 |
20 Jan 2021 |
10 Jul 2021 |
Valid |
General Works at Kai Tak |
|
GW-RE0474-21 |
21 May 2021 |
20 Nov 2021 |
Valid |
ELS Removal at Stage 1 UWT |
|
GW-RE0259-21 |
1 Apr 2021 |
30 Sep 2021 |
Valid |
Kai Tak Haul Road |
|
PP-RE0018-21 |
3 Jun 2021 |
2 Aug 2021 |
Valid on 3 Jun
2021 |
Percussive Piling at Stage
2 Underwater Tunnel |
|
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 |
||||
|
-- |
-- |
-- |
-- |
-- |
|
Billing Account for Construction
Waste Disposal |
||||
|
7029909 |
22 Jan 2018 |
End of Project |
Account Active |
-- |
|
7031949 |
27 May 2021 |
26 Aug 2021 |
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 June 2021 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 & 2238) |
|
|
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 June 2021 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 May 2021 |
11 June 2021 |
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 |
28.5 |
14.8 – 35.3 |
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 |
60.4 |
52.4
– 65.1 |
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 |
63.4
– 66.2 |
75 |
|
E-N21a |
61.9
– 68.2 |
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 4,649 m3 of
inert C&D
material were generated and 477 m3 disposed
of as public fill, 4,172 m3 of inert C&D was reused in the
Contract and no other projects respectively in the reporting month. 110,830 kg general refuse was generated and sent to NENT
Landfill in the reporting month. 3 kg of plastics and No
paper/cardboard packaging and metals were collected by
recycle contractor in the reporting month. No chemical waste was
collected by licensed contractor in the reporting month. No Type 1,
Type 2 and 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 Practise 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 2,
16 and 30 June 2021. 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, 5 site inspections
were carried out on 2, 9, 16, 23 and
30 June
2021. Joint
inspections with the IEC, ER, the Contractor and ET were conducted on 23 June 2021. 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 |
Nil |
Nil |
Nil |
|
Water Quality |
16 Jun 2021 |
· Gap of silt curtain was observed at Stage 1 UWT. The
Contractor should enhance the effectiveness of silt curtain for silt
blockage. |
The item was rectified by the
Contractor on 22 Jun 2021. |
|
Reminder: · The Contractor was reminded to remove the stagnant water
inside the drip trap at the vessel near Ma Tau Kok. |
The item was rectified by the Contractor on 18 Jun 2021. |
||
|
30 Jun 2021 |
Reminder: · The Contractor was reminded to clean up the overflow mud
to prevent muddy water spillage at Ma Tau Kok. |
The item was rectified by the Contractor on 6 Jul 2021 |
|
|
Waste/ Chemical Management |
2 Jun 2021 |
· Oil drum was observed stored without drip tray at the
vessel near Ma Tau Kok. The Contractor should store the oil drum with drip
tray for oil spillage prevention. |
The item was rectified by the
Contractor on 4 Jun 2021. |
|
· General refuse was observed stored without enclosed bin at
Kai Tak. The Contractor should store the general refuse with the enclosed
bin. |
The item was rectified by the
Contractor on 7 Jun 2021. |
||
|
Landscape & Visual |
Nil |
Nil |
Nil |
|
Permits/ Licenses |
Nil |
Nil |
Nil |
6.1.3
No follow-up actions were requested by
Contractor’s ET on 9 and 23 June 2021.
6.1.4
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.
7.1.4 No 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 No environmental related complaint, notification of summons and
successful prosecution were received in the reporting month.
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 July and September 2021
are provided in Table 8.1.
Table 8.1 Construction Activities in the coming three months
|
Locations |
Site Activities |
|
Kai
Tak |
·
Wall and roof slab construction at cut & cover,
underpass and depressed road; ·
Backfilling works and ELS removal at cut & cover,
underpass and depressed road; ·
Dismantle of working platform. |
|
Ma
Tau Kok |
·
TTM implementation; ·
Pre-grouting works for pipe piling works of MTK C&C
Tunnel ·
Pipe piling works for cut and cover tunnel; ·
Temporary storm drain diversion works. |
|
Kowloon
Bay |
·
Backfilling and ELS removal works at Stage 1 UWT; ·
Waterproofing application at Stage 1 UWT; ·
Seawall Reinstatement at Stage 1 UWT; ·
Pipe piling and other preparation works for Stage 2 UWT. |
8.2
Key Issues for the Coming Month
8.2.1 Potential environmental impacts arising from the above construction
activities are mainly associated with construction
dust, construction noise, and waste management.
8.3
Monitoring Schedule for the Coming Month
8.3.1
The tentative schedule for
environmental monitoring in July
2021 is provided in Appendix
F.
9
ConclusionS
AND RECOMMENDATIONS
9.1
Conclusions
9.1.1 1-hour TSP, 24-hour TSP and noise monitoring were carried out in the
reporting month.
9.1.2 All 24-hour TSP monitoring results complied with the Action / Limit
Level at in the reporting month.
9.1.3 All 1-hour TSP result was below the Action and Limit Levels at all
monitoring locations in the reporting month.
9.1.4 No
Action and Limit Level exceedance for noise was recorded at all monitoring
stations in the reporting month.
9.1.5
5 nos. of environmental site inspections were carried out in June 2021. Recommendations on remedial actions were given by ET and IEC to
the Contractor for the deficiencies identified during the site audit.
9.1.6 No environmental related
complaint, notification of summons and successful prosecution were received in
the reporting month.
9.2
Recommendations
9.2.1 According to the environmental site inspections performed in the
reporting month, the following recommendations were provided: -
Air Quality Impact
· No specific observation was identified in the reporting
month.
Construction Noise Impact
· No specific observation was identified in the
reporting month.
Water Quality Impact
· The Contractor should enhance the effectiveness of
silt curtain for silt blockage;
· The Contractor was reminded to remove the stagnant
water inside the drip trap; and
· The Contractor was reminded to clean up the
overflow mud to prevent muddy water spillage.
Chemical and Waste Management