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Gammon Construction
Limited
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
6.2.......... Reminders 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 September 2021 |
|
|
|
|
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 42nd
monthly EM&A Report presenting the EM&A works carried out during the
period between 1 and 30 September 2021. As informed by the Contractor, major activities
in the reporting period were:
|
Locations |
Site Activities |
|
Kai Tak |
·
Wall and roof slab construction at cut & cover, underpass and
depressed road; ·
Backfilling and removal of ELS at Underpass and depressed road; ·
Waterproof works at depressed road; ·
Drainage construction at cut & cover; ·
Dismantle of working platform" |
|
Ma Tau Kok |
·
TTM implementation; ·
Trial trench for piling works; ·
Pre-grouting works for pipe piling works for MTK C&C Tunnel; ·
Pipe pilling works for MTK C&C tunnel |
|
Kowloon Bay |
·
Seawall Reinstatement at Stage 1 UWT; ·
Construction of remaining bulkhead wall at Stage 1 UWT; ·
Pipe pile removal at Stage 1 UWT; ·
Stage 1 Marine Platform Removal for Stage 2 UWT; ·
Piling Works for Stage 2 UWT; ·
Erect Marine Platform for Stage 2 UWT; ·
Marine King Post and Access Platform Construction. |
|
|
|
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
Two
(2) noise-related complaints were received in the reporting month. Based on the
investigation results from finalized investigation reports, it was concluded that:
(i) Proper implementation of noise mitigation
measures was implemented by the Contractor at Ma Tau Kok
to comply with the requirement of the approved Construction Noise Mitigation
Measures Plan such as acoustic sheet barrier on the specific Powered Mechanical
Equipment, and Quality PME were used to conduct the construction works.
(ii)
The
percussive piling method, pile type and time conducted were complied with the
CNP (No.: PP-RE0027-21) at the Stage 2
Underwater Tunnel.
(iii)
Based
on the monitoring results on September 2021, all readings were recorded under
the criteria stipulated in EIAO-TM.
Regular Noise Monitoring
No exceedance of Limit level of noise was
recorded in the reporting month.
Complaint,
Notification of Summons and Successful Prosecution
Three (3) environmental related complaints
were received in the reporting month as follows:
|
Date received |
Complaint No. |
Parameter |
Status |
|
18
September 2021 (Referred by the Gammon Construction Limited on 20 September 2021) |
EC-041-CKRKTW20210918_01_C084 |
Noise, Air (Dust) and Air (Odor) |
Closed |
|
17&18
September 2021 (Referred by Gammon Construction Limited on 21 September 2021) |
EC-042- KRKTW20210917_01_C083 |
Noise |
Closed |
|
29 September 2021 (Referred by Gammon Construction Limited on 5 October 2021) |
EC-043-CKRKTW20210614_01_C085 (EPD ref.: K10/RE/00023313-21) |
Water |
Under investigation and will be provided in
subsequent Monthly EM&A Report |
No 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 |
- Wall and roof slab
construction at cut & cover and underpass; |
|
Ma Tau Kok |
- TTM implementation; |
|
Kowloon Bay |
- Seawall Reinstatement at
Stage 1 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 42nd monthly
EM&A Report which summaries the impact monitoring results and audit findings for
the Project during the reporting period between 1 and 30 September 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 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 |
·
Wall and roof slab construction at cut & cover, underpass and
depressed road; ·
Backfilling and removal of ELS at Underpass and depressed road; ·
Waterproof works at depressed road; ·
Drainage construction at cut & cover; ·
Dismantle of working platform |
|
Ma
Tau Kok |
·
TTM implementation; ·
Trial trench for piling works; ·
Pre-grouting works for pipe piling works for MTK C&C Tunnel; ·
Pipe pilling works for MTK C&C tunnel |
|
Kowloon
Bay |
·
Seawall Reinstatement at Stage 1 UWT; ·
Construction of remaining bulkhead wall at Stage 1 UWT; ·
Pipe pile removal at Stage 1 UWT; ·
Stage 1 Marine Platform Removal for Stage 2 UWT; ·
Piling Works for Stage 2 UWT; ·
Erect Marine Platform for Stage 2 UWT; ·
Marine King Post and Access Platform Construction. |
|
|
|
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-RE0732-21 |
3 Aug 2021 |
2-Feb-2022 |
Valid |
General Works at Ma Tau Kok |
|
GW-RE0658-21 |
11 Jul 2021 |
10 Jan 2022 |
Valid |
General Works at Kai Tak |
|
GW-RE0474-21 |
21 May 2021 |
20 Nov 2021 |
Valid |
ELS Removal at Stage 1 UWT |
|
PP-RE0027-21 |
2 Aug 2021 |
31 Jan 2022 |
Valid |
Percussive Piling at Stage 2 Underwater Tunnel |
|
GW-RE0259-21 |
1 Apr 2021 |
30 Sep 2021 |
Valid until 30
Sep 2021 |
Kai Tak Haul Road |
|
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 Aug 2021 |
25 Nov 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 September 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 & 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 September 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 August 2021 |
14 September 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 |
33.6 |
20.2 – 46.6 |
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 |
60.4 |
52.4
– 67.6 |
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 |
63.2
– 71.8 |
75 |
|
E-N21a |
61.1
– 64.5 |
75 |
5.2.2
Two (2)
noise-related complaints were received in the reporting month. Based on the
investigation results from finalized investigation reports, it was concluded that:
i. Proper implementation of noise mitigation measures was implemented by the Contractor at Ma Tau Kok to comply with the requirement of the approved Construction Noise Mitigation Measures Plan such as acoustic sheet barrier on the specific Powered Mechanical Equipment, and Quality PME were used to conduct the construction works.
ii. The percussive piling method, pile type and time conducted were complied with the CNP (No.: PP-RE0027-21) at the Stage 2 Underwater Tunnel.
iii. Based on the monitoring results on September 2021, all readings were recorded under the criteria stipulated in EIAO-TM.
5.2.3
Therefore,
two action levels of construction noise were triggered, and the investigation reports
were finalized on 5 October 2021.
5.2.4 No Limit Level exceedance for noise was
recorded at all monitoring stations in the reporting month.
5.2.5 The event and action plan is annexed in Appendix I.
5.2.6 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 3,880 m3 of
inert C&D material were generated and 382 m3 disposed
of as public fill, 3,498 m3 of inert C&D was reused in the Contract
and no other projects respectively in the reporting month. 148,830 kg 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. 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 8 and 22 September 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 1, 8, 15, 21 and 29 September 2021. Joint inspections with the IEC, ER, the Contractor
and ET were conducted on 15 September 2021. No non-compliance was recorded
during the site inspection. Details of observations and reminders recorded during
the site inspections are presented in Table 6.1 and Table 6.2 respectively.
Table 6.1 Observations and Recommendations of Site Audit
|
Parameters |
Date |
Observations and Recommendations |
Follow-up |
|
Air Quality |
Nil |
Nil |
Nil |
|
Noise |
8 Sep 2021 |
· The Contractor was reminded to apply noise
barrier for the PMEs at Ma Tau Kok properly. |
The
item was rectified by the Contractor on 15 Sep 2021. |
|
Water Quality |
1 Sep 2021 |
· The
plug of the drip tray for the generator was missing on the Marine Platform of
Stage 2 of UWT. The contractor was reminded to apply a plug on the drip tray. |
The
item was rectified by the Contractor on 8 Sep 2021. |
|
8 Sep 2021 |
· Gap
of silt curtain was observed at Ma Tau Kok. |
The
item was rectified by the Contractor on 15 Sep 2021. |
|
|
29 Sep 2021 |
· Floating
refuse was observed at MTK site. The Contractor should maintain the cleanliness
of embayed marine water. |
The
item was rectified by the Contractor on 6 Oct 2021. |
|
|
29 Sep 2021 |
· Drip
tray should be provided for chemicals on the Marine Platform. |
The
item was rectified by the Contractor on 6 Oct 2021. |
|
|
Waste/ Chemical Management |
Nil |
Nil |
Nil |
|
Landscape & Visual |
Nil |
Nil |
Nil |
|
Permits/ Licenses |
Nil |
Nil |
Nil |
Table 6.2 Reminders and Recommendations of Site Audit
|
Parameters |
Date |
Reminder and Recommendations |
Follow-up |
|
Air Quality |
Nil |
Nil |
Nil |
|
Noise |
Nil |
Nil |
Nil |
|
Water Quality |
15 Sep 2021 |
Reminder: · Bunding
at site boundary was reminded to prevent any material dropping to the marine
at MTK. |
The
item was rectified by the Contractor on 21 Sep 2021. |
|
21 Sep 2021 |
Reminder: · The
Contractor was reminded to clean the mud near the entrance at MTK site. |
The
item was rectified by the Contractor on 29 Sep 2021. |
|
|
21 Sep 2021 |
Reminder: · The
Contractor was reminded to provide precautionary measure to prevent any
material dropping to the marine at the marine platform. |
The
item was rectified by the Contractor on 29 Sep 2021. |
|
|
29 Sep 2021 |
Reminder: · The
Contractor was reminded to plug the drip tray at Marine Platform. |
The
item was rectified by the Contractor on 6 Oct 2021. |
|
|
Waste/ Chemical Management |
15 Sep 2021 |
Reminder: · Precaution
measure was reminded for the breaker’s head to prevent oil leakage. |
The
item was rectified by the Contractor on 21 Sep 2021. |
|
Landscape & Visual |
Nil |
Nil |
Nil |
|
Permits/ Licenses |
29 Sep 2021 |
Reminder: ·
The Contractor was reminded to
provide a NRMM label with suitable size (200mm (W) x 130mm (H)) on the
excavator at MTK site. |
The
item was rectified by the Contractor on 6 Oct 2021. |
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.
6.1.4
No
follow-up action requested by Contractor ET’s during the site inspection on 15
and 21 September 2021 in the reporting month.
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
Two (2)
noise-related complaints were received in the reporting month. Therefore, two
action levels of construction noise were triggered, and the investigation
reports were finalized on 5 October 2021.
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 Three (3) environmental related
complaints were received in the reporting month as follows:.
|
Date received |
Complaint No. |
Parameter |
Status |
|
18 September 2021 (Referred by the Gammon Construction Limited on 20 September 2021) |
EC-041-CKRKTW20210918_01_C084 |
Noise, Air (Dust) and Air (Odor) |
Closed |
|
17&18 September 2021 (Referred by Gammon Construction Limited on 21 September 2021) |
EC-042- KRKTW20210917_01_C083 |
Noise |
Closed |
|
29 September 2021 (Referred by Gammon Construction Limited on 5 October 2021) |
EC-043-CKRKTW20210614_01_C085 (EPD ref.: K10/RE/00023313-21) |
Water |
Under
investigation and will be provided in subsequent Monthly EM&A Report |
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 October
and December 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 and underpass; |
|
Ma
Tau Kok |
-
TTM implementation; |
|
Kowloon
Bay |
-
Seawall Reinstatement at Stage 1 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 October
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
Two (2)
noise-related complaints were received in the reporting month. Therefore, two
action levels of construction noise were triggered, and the investigation
reports were finalized on 5 October 2021.
9.1.5 No Limit Level exceedance for noise was
recorded at all monitoring stations in the reporting month.
9.1.6 5 nos. of environmental site inspections were carried out in September 2021. Recommendations on remedial actions were given by ET and IEC to the Contractor for the deficiencies identified during the site audit.
9.1.7 Three (3) environmental related
complaints were received in the reporting month as follows:
|
Date received |
Complaint No. |
Parameter |
Status |
|
18 September 2021 (Referred by the Gammon Construction Limited on 20 September 2021) |
EC-041-CKRKTW20210918_01_C084 |
Noise, Air (Dust) and Air (Odor) |
Closed |
|
17&18 September 2021 (Referred by Gammon Construction Limited on 21 September 2021) |
EC-042- KRKTW20210917_01_C083 |
Noise |
Closed |
|
29 September 2021 (Referred by Gammon Construction Limited on 5 October 2021) |
EC-043-CKRKTW20210614_01_C085 (EPD ref.: K10/RE/00023313-21) |
Water |
Under
investigation and will be provided in subsequent Monthly EM&A Report |
9.1.8
No 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
·
The Contractor was reminded to erect the noise barrier properly on the PMEs
for noise screening.
Water Quality
Impact
·
The contractor was reminded to apply a plug on the drip tray at Marine Platform.
·
The contractor was advised to maintain the silt curtain properly.
·
The contractor was reminded to provide bunding at site boundary.
·
The Contractor was reminded to clean the mud near the entrance at Ma Tau
Kok site.
·
The Contractor was reminded to maintain the cleanliness of embayed
marine water at Ma Tau Kok site.
Chemical and Waste
Management