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 twenty-ninth monthly EM&A Report presenting the EM&A works
carried out during the period between 1 and 31 August 2020. 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;
·
Backfilling
at Underpass;
·
Removal
of ELS at underpass and depressed road;
·
Falsework
erection at underpass.
|
|
Ma Tau Kok
|
·
TTM
implementation;
·
Pipe
piling works for cut and cover tunnel;
·
Rock
Excavation;
·
Shotcreting
at the Access Shaft;
·
Fresh
water pipe installation works;
·
Backfilling
at Covered Walkway.
|
|
Kowloon Bay
|
·
Excavation
for Stage 1 underwater tunnel;
·
S5 and S6
Truss fabrication and installation;
·
Temporary
Grouting;
·
Concrete
packing between wailing and CPP Wall;
·
Blinding
layer and base slab construction;
·
Waterproofing
application.
|
|
Barging Point
|
·
Barging
point operation (Spoil Disposal)
|
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.
Regular Noise Monitoring
One (1) ongoing noise-related
complaint in July 2020 was brought to August 2020. Based on the investigation
result from the finalized investigation report, proper implementation of
mitigation measures was conducted during the non-restricted hour and complied
with the condition of valid Construction Noise Permit during the restricted
hour. The complaint was finalized on 14 August 2020.
One (1) noise-related complaint
was received in the reporting month. Based on the investigation result from finalized
investigation report, proper implementation of mitigation measures during the
non-restricted hour and complied with the condition of valid Construction Noise
Permit during the restricted hour. Therefore, one action level of construction
noise was triggered, and the investigation report was finalized on 26 August
2020.
No exceedance of Limit Level of noise was recorded in the reporting
month.
Complaint, Notification of Summons and Successful
Prosecution
One (1) complaint received by Gammon Construction Limited for noise
on 8 August 2020. Furthermore, an additional information from the complainant
was received and updated by Gammon Construction Limited on 13 August 2020. The
investigation report for complaint was finalized 26 August 2020.
No notification of summons and successful prosecution were received in the
reporting month.
Reporting Changes
There
was no reporting change in the reporting month.
Future Key Issues
Key
issues to be considered in the next three months included:
|
Locations
|
Site
Activities
|
|
Kai Tak
|
·
Base slab
and wall, 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;
·
ELS
removal at Underpass
|
|
Ma Tau Kok
|
·
TTM
implementation;
·
Rock
excavation;
·
Pipe
piling works for cut and cover tunnel;
·
Fresh
water pipe installation works;
·
Constrcution
of MTK east wall;
·
Constrcution
of traffic deck;
·
Covered
walkway construction.
|
|
Kowloon Bay
|
·
Excavation
for stage 1 underwater tunnel;
·
S6 ELS
installation;
·
Backfilling
and ELS removal works;
·
Blinding
layer, base slab and wall construction;
·
Removal of
gas pipe line;
·
Waterproofing
application
|
|
Barging Point
|
·
Barging
point operation (Spoil Disposal)
|
Potential environmental impacts
arising from the above construction activities are mainly associated with construction
dust,
construction noise, water pollution control, and waste management.
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.
1.1.1
This
is the twenty-ninth monthly
EM&A Report which summarizes the impact monitoring results and
audit findings for the Project during the reporting period between 1 and 31 August 2020.
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
·
·
2.1.1
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/C) was issued by the Director of Environmental
Protection (DEP) on 16 January 2017. 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.
2.2.1
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.
2.3.1 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;
·
Backfilling
at Underpass;
·
Removal
of ELS at underpass and depressed road;
·
Falsework
erection at underpass.
|
|
Ma Tau Kok
|
·
TTM
implementation;
·
Pipe
piling works for cut and cover tunnel;
·
Rock
Excavation;
·
Shotcreting
at the Access Shaft;
·
Fresh
water pipe installation works;
·
Backfilling
at Covered Walkway.
|
|
Kowloon Bay
|
·
Excavation
for Stage 1 underwater tunnel;
·
S5 and S6
Truss fabrication and installation;
·
Temporary
Grouting;
·
Concrete
packing between wailing and CPP Wall;
·
Blinding
layer and base slab construction;
·
Waterproofing
application.
|
|
Barging Point
|
·
Barging
point operation (Spoil Disposal)
|
2.3.2
The construction programme
is presented in Appendix A.
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
|
|
AECOM
|
Contractor’s Environmental Team (ET)
|
ET Leader
|
Mr. Y T Tang
|
3922 9392
|
2317 7609
|
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 Mar 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
|
|
WT00030333-2018
|
27 Apr 2018
|
30 Apr 2023
|
Valid
|
Barging Point at Portions 4B & 4C
|
|
WT00030330-2018
|
27 Apr 2018
|
30 Apr 2023
|
Valid
|
Kowloon Bay
|
|
Construction
Noise Permit
|
|
GW-RE0108-20
|
6 Mar 2020
|
26 Aug 2020
|
Valid until
26 Aug 2020
|
Barging Point
Operation at Kai Tak Barging Point
|
|
GW-RE0709-20
|
27 Aug 20
|
26 Feb 21
|
Valid on 27
Aug 2020
|
|
GW-RE0301-20
|
5 May
2020
|
4 Aug 2020
|
Valid
until 4 Aug 2020
|
Rock
Breaking at Ma Tau Kok
|
|
GW-RE0603-20
|
4-Aug-20
|
3-Nov-20
|
Valid on 4
Aug 2020
|
|
GW-RE0534-20
|
23 Jun 2020
|
21 Dec 2020
|
Valid
|
General
Works at Kai Tak
|
|
GW-RE0478-20
|
13 Jun 2020
|
12 Dec 2020
|
Valid
|
ELS
Installation and Excavation at Stage 1 Underwater Tunnel
|
|
GW-RE0254-20
|
9 Apr 2020
|
30 Sep
2020
|
Valid
|
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 May 2020
|
26 Aug 2020
|
Expired on 26 Aug 2020
|
Billing Account for Disposal
of Construction Waste (by vessels)
|
|
27 Aug 20
|
26 Nov 20
|
Renewed on 27 Aug 2020
|
|
Notification Under Air Pollution Control (Construction Dust) Regulation
|
|
429442
|
5 Jan 2018
|
5 Jul 2025
|
Notified
|
--
|
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
|
Equipment
|
Brand and Model
|
|
High Volume
Sampler
(24-hour TSP)
|
Tisch Total Suspended Particulate Mass Flow Controlled High
Volume Air Sampler
(Model No. TE-5170)
|
|
Calibration Kit
(24-hour TSP)
|
TISCH Environmental Orifice
(Model TE-5025A)
|
|
Portable direct reading dust meter
(1-hour TSP)
|
Sibata Digital Dust
Monitor
(Model No. LD-3)
|
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)
|
Note:
[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 August 2020
is provided in Appendix F.
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
|
Monitoring Equipment
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
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:
A
(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
1.1.1
The schedule for environmental monitoring
in August 2020 is provided in Appendix F.
3.2.7
3.3
Construction
Water Monitoring
Monitoring
Requirements
3.3.1
According
to the Contractor information, intermittent dredging activity will be carried
out from 10 September 2020.
3.3.2
In
accordance with the approval EM&A Manual, the impact monitoring shall be
conducted during dredging period. The monitoring shall normally be established
by measuring the Dissolved Oxygen (DO), temperature, turbidity, pH, salinity,
Suspended Solids (SS) and copper level and total PAHs at all designated
locations.
3.3.3
The
measurement shall be taken at all designated monitoring stations including control
stations, 3 days per week, at mid-flood and mid-ebb tides. Tidal range of
individual flood and ebb tides should be not less than 0.5m. The interval between
two sets of monitoring shall not be less than 36 hours.
3.3.4
All the
monitoring shall be taken at 3 water depths, namely 1m below water surface,
mid-depth station and 1m above sea bed, except where
the water depth less than 6m, the mid-depth station may be omitted. Should the
water depth be less than 3m, only the mid-depth station will be monitored.
3.3.5
The tentative schedule for impact water quality monitoring in September
2020 is provided in Appendix F.
3.4.1
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.
4.1.1
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
EP- 457/2013/C
and
Condition 3.4 of
FEP-01/457/2013/C
|
Monthly EM&A
Report for July 2020
|
14 August 2020
|
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
|
25.4
|
13.6 - 50.2
|
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
|
59.7
|
57.0 – 63.8
|
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.
5.2.1
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
|
63.9 – 67.1
|
75
|
|
E-N21a
|
63.9 – 67.3
|
75
|
5.2.2
One (1) ongoing
noise-related complaint in July 2020 was brought to August 2020. Based on the investigation result from the
finalized investigation report, proper implementation of mitigation measures was conducted during the non-restricted hour and complied with the condition of valid Construction Noise Permit
during the restricted hour. The complaint was finalized on 14 August 2020.
5.2.3
One (1) noise-related complaint was received in the reporting month.
Based on the investigation result from finalized investigation report, proper
implementation of mitigation measures during the non-restricted hour and complied
with the condition of valid Construction Noise Permit during the restricted
hour. Therefore, one action level of construction noise was triggered, and the investigation
report was finalized on 26 August 2020.
5.2.4
No Limit Level exceedance of noise was recorded at the monitoring
station 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.
6
Waste
Management
6.1.1
C&D materials and wastes sorting were carried out on site. Receptacles
were available for C&D wastes and general refuse collection.
6.1.2 According to the Contractor’s information, the concerned soil, which assessed
under the updated Supplementary Contamination
Assessment Report, had been excavated in August 2019. In order to minimize the potentially
adverse environmental impacts arising for the handling of potentially contaminated
materials, the following environmental mitigation measures are proposed during
the course soil excavation, stockpiling and backfilling works:
l Excavation
profiles must be properly designed and executed.
l Stockpiling
site(s) shall be lined with impermeable sheeting and bunded. Stockpiles shall
be fully covered by impermeable sheeting to reduce dust emission.
l Excavation
and stockpiling should be carried out during dry season as far as possible to
minimise potentially contaminated runoffs from the Concerned Soil.
l Regular
site audit will be conducted under the Environmental Monitoring and Audit (EM&A)
programme to ensure the soil excavation, stockpiling and backfilling works are carried
out in accordance with this report. Findings
of the site audit will be presented in Table
7.1.
l The
truck transferring Concerned Soil shall be covered entirely by impervious
sheeting to ensure that the dusty materials do not leak from the truck.
6.1.3 As advised by the Contractor, Total 30,438 m3 of inert C&D material was generated, 28,512
m3 inert C&D material was disposed at the Public Fills, 1,926 m3
was reused in other contract in the reporting month. 48,120 kg general refuse was generated and sent to NENT Landfill in the reporting
month. No paper/cardboard packaging,
metals and plastics were collected by recycle contractor in the reporting month.
No chemical waste was collected by licensed contractor
in the reporting period. 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.
6.1.4
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.
6.1.5
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.
6.2.1
Bi-weekly inspection of the
implementation of landscape and visual mitigation measures was conducted on 12
and 24 August 2020. 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.
7.1.1 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.
7.1.2 In the reporting month,
4 site inspections were carried out on 4, 12, 20 and 24 August 2020. Joint inspections with the
IEC, ER, the Contractor and the ET were conducted on 24 August 2020. In addition, no joint inspection with EPD, ER and
the Contractor was conducted in August 2020 to check
the compliance of the dumping permit condition. No non-compliance was recorded
during the site inspection. Details of observations recorded during the site
inspections are presented in Table 7.1.
Table 7.1 Observations
and Recommendations of Site Audit
|
Parameters
|
Date
|
Observations and Recommendations
|
Follow-up
|
|
Air Quality
|
4 August 2020
|
Reminder:
· The Contractor was reminded to replace the damaged
NRMM label on the excavator at Covered Walkway.
|
The item was rectified on 10 August 2020.
|
|
20 August 2020
|
· Proper NRMM label was not observed on the excavator at
Ma Tau Kok. The Contractor
was reminded to affix proper NRMM label on the excavator.
|
The item was rectified on 22 August 2020.
|
|
24 August 2020
|
·
Haul
road was observed to be dry at Steel Platform. The Contractor was reminded to
provide water spraying regularly for dust suppression.
|
The item was rectified on 31 August 2020.
|
|
Noise
|
4 August 2020
|
Reminder:
· The Contractor was reminded to erect the noise barrier properly for air
compressor at Ma Tau Kok.
|
The item was rectified on 6 August 2020.
|
|
Water Quality
|
4 August 2020
|
· Minor muddy seepage was observed from the silt curtain
at the Steel Platform. The Contractor was reminded to
maintain the silt curtain properly.
|
The item was rectified on 7 August 2020.
|
|
12 August 2020
|
Reminder:
·
The
Contractor was reminded to store all chemical waste containers at MTK access
shaft into drip tray for preventing potential leakage.
|
The item was rectified on 18 August 2020.
|
|
20 August 2020
|
·
Stagnant
water was observed accumulated in the drip tray at Ma Tau Kok.
The Contractor was reminded to remove the stagnant water to resume the
capacity of drip tray.
|
The item was rectified on 22 August 2020.
|
|
24 August 2020
|
·
Chemicals were observed stored
without drip tray at Kai Tak. The Contractor was reminded to provide proper
measure for chemical storage.
|
The item was rectified on 26 August 2020.
|
|
· Residual silt was rested on the edge of barge at Steel Platform. The
Contractor was reminded to remove the residual silt to prevent dusty material
drop into waterbodies accidentally.
|
The item was rectified on 25 August 2020.
|
|
Waste/ Chemical Management
|
Nil
|
Nil
|
Nil
|
|
Land Contamination
|
Nil
|
Nil
|
Nil
|
|
Landscape
& Visual
|
Nil
|
Nil
|
Nil
|
|
Permits/
Licenses
|
Nil
|
Nil
|
Nil
|
7.1.3
All of follow-up actions requested by
Contractor's ET and IEC during the site inspection were undertaken as reported
by the Contractor and confirmed in the following weekly site inspection
conducted during the reporting period. No follow-up action requested by EPD
during the site inspection in the reporting month.
7.2.1
All 24-hour TSP result was below the Action and Limit Levels
at all monitoring locations in the reporting month.
7.2.2
All 1-hour TSP result was below the Action and Limit Levels
at all monitoring locations in the reporting month.
7.2.3
One (1) ongoing
noise-related complaint in July 2020 was brought to August 2020. Based on the investigation result from the
finalized investigation report, proper implementation of mitigation measures was conducted during the non-restricted hour and complied with the condition of valid Construction Noise Permit
during the restricted hour. The complaint was finalized on 14 August 2020.
7.2.4
One (1) noise-related complaint was received in the reporting month.
Based on the investigation result from finalized investigation report, proper
implementation of mitigation measures during the non-restricted hour and complied
with the condition of valid Construction Noise Permit during the restricted
hour. Therefore, one action level of construction noise was triggered, and the investigation
report was finalized on 26 August 2020.
7.2.5
No Limit Level exceedance for noise was recorded at all
monitoring stations in the reporting month.
7.3.1
No environmental non-compliance was recorded in the reporting
month.
7.4.1
One (1)
complaint
received by Gammon Construction Limited for noise on 8 August 2020. Furthermore,
an additional information from the complainant was received and updated by
Gammon Construction Limited on 13 August 2020. The investigation report for
complaint was finalized 26
August 2020.
7.4.2
Cumulative statistics on notification of complaint is provided in Appendix J
7.5
Summary of Environmental Summon and Successful
Prosecutions
7.5.1
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
1.1.1
.
7.5.2
8.1.1
The major construction works between September and November 2020 is provided in Table 8.1.
Table
8.1 Construction Activities in the coming three
months
|
Locations
|
Site Activities
|
|
Kai Tak
|
·
Base slab
and wall, 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;
·
ELS
removal at Underpass.
|
|
Ma Tau Kok
|
·
TTM
implementation;
·
Rock
excavation;
·
Pipe
piling works for cut and cover tunnel;
·
Fresh
water pipe installation works;
·
Constrcution
of MTK east wall;
·
Constrcution
of traffic deck;
·
Covered
walkway construction.
|
|
Kowloon Bay
|
·
Excavation
for stage 1 underwater tunnel;
·
S6 ELS
installation;
·
Backfilling
and ELS removal works;
·
Blinding
layer, base slab and wall construction;
·
Removal of
gas pipe line;
·
Waterproofing
application.
|
|
Barging Point
|
·
Barging
point operation (Spoil Disposal)
|
8.2.1
Potential environmental impacts arising from the above
construction activities are mainly associated with construction dust, construction noise, and waste management.
8.3.1
The tentative schedule for environmental monitoring in September 2020 is provided in Appendix F.
9.1.1
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
One (1) ongoing
noise-related complaint in July 2020 was brought to August 2020. Based on the investigation result from the
finalized investigation report, proper implementation of mitigation measures was conducted during the non-restricted hour and complied with the condition of valid Construction Noise Permit
during the restricted hour. The complaint was finalized on 14 August 2020.
9.1.5
One (1) noise-related complaint was received in the reporting month.
Based on the investigation result from finalized investigation report, proper
implementation of mitigation measures during the non-restricted hour and complied
with the condition of valid Construction Noise Permit during the restricted
hour. Therefore, one action level of construction noise was triggered, and the investigation
report was finalized on 26 August 2020.
9.1.6
No Limit Level exceedance for noise was recorded at all monitoring stations in the reporting month.
9.1.7
4 nos. of environmental site inspections and no site inspections with EPD were carried out in August
2020. Recommendations
on remedial actions were given to the Contractor for the deficiencies identified
during the site audit.
9.1.8
One (1)
complaint
received by Gammon Construction Limited for noise on 8 August 2020. Furthermore,
an additional information from the complainant was received and updated by
Gammon Construction Limited on 13 August 2020. The investigation report for
complaint was finalized 26
August 2020.
9.1.9
No notification of summons and successful prosecution were
received in the reporting month.
9.2.1
According to the environmental site inspections performed
in the reporting month, the following recommendations were provided:
Air Quality Impact
·
The Contractor was reminded
to affix proper NRMM label on the restricted machinery;
·
The Contractor was reminded
to provide water spraying regularly for dust suppression.
Construction Noise Impact
·
The Contractor was reminded
to erect the noise barrier properly for air compressor.
Water Quality Impact
·
The Contractor was reminded
to maintain the silt curtain properly;
·
The Contractor was reminded
to store chemical waste containers and chemical into drip tray for preventing
potential leakage;
·
The Contractor was reminded
to remove the stagnant water to resume the capacity of drip tray;
·
The Contractor was reminded
to remove the residual silt to prevent dusty material drop into waterbodies
accidentally.
Chemical and Waste Management
·
No specific observation was identified
in the reporting month.
Landscape & Visual Impact
· No specific observation was identified in the reporting
month.
Permits/licenses
·
No specific observation was identified
in the reporting month.
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