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-first monthly EM&A Report presenting the EM&A works carried out
during the period between 1 and 31 December 2019. As informed by the Contractor, major activities in
the reporting period were:
|
Locations
|
Site Activities
|
|
Kai Tak
|
·
Excavation and ELS installation at cut & cover tunnel,
depressed road and underpass
·
Temporary working platform installation at underpass and
depress road
·
Construction of New Right of Way
·
Temporary Grouting
|
|
Ma Tau Kok
|
·
TTM implementation
·
Soft Excavation and Rock Excavation
·
ELS installation & decking works for access shaft
·
Existing drainage diversion works
·
Construction of footpath
·
Backfilling works and ELS removal at Landing Step
|
|
Kowloon Bay
|
·
Wall tie installation for stage 1 temporary reclamation
·
S1 Truss fabrication and installation
·
Temporary Grouting
|
|
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.
Breaches of Action and Limit Levels for Noise
Regular Noise Monitoring
One (1) noise related complaint was received
in the reporting month. Based on the investigation result, the noise nuisance
from the construction site was minimized with the proper implementation of
mitigation measures. Therefore, one action level of noise was triggered and the investigation report was finalized on 19 December 2019.
No
exceedance of Limit Level of noise was recorded in the reporting month.
Complaint, Notification of Summons and Successful Prosecution
One
(1) complaints (received by 1823 on 9 December 2019) were referred by the
Contractor on 10 December 2019, the investigation report was finalized on 19 December 2019.
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 construction at underpass
·
Excavation and ELS installation at cut & cover tunnel,
depressed road and underpass
·
Temporary Grouting
·
Backfilling works and ELS removal at Underpass
|
|
Ma Tau Kok
|
·
TTM implementation
·
Soft and rock excavation
·
ELS installation for access shaft
·
Pipe piling works for cut and cover tunnel
·
Existing drainage diversion works
·
Fresh water pipe installation works
·
Caping construction at Landing Step
·
Cover walkway construction at Landing Step
|
|
Kowloon Bay
|
·
Excavation for stage 1 underwater tunnel
·
ELS installation
·
Dewatering well and observation well installation
·
Temporary Grouting
·
Pumping Test
|
|
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-first monthly EM&A Report which summarizes the impact monitoring results and audit findings
for the Project during the reporting period between 1 and 31 December 2019.
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
|
·
Excavation and ELS installation at cut & cover tunnel,
depressed road and underpass
·
Temporary working platform installation at underpass and
depress road
·
Construction of New Right of Way
·
Temporary Grouting
|
|
Ma
Tau Kok
|
·
TTM implementation
·
Soft Excavation and Rock Excavation
·
ELS installation & decking works for access shaft
·
Existing drainage diversion works
·
Construction of footpath
·
Backfilling works and ELS removal at Landing Step
|
|
Kowloon
Bay
|
·
Wall tie installation for stage 1 temporary reclamation
·
S1 Truss fabrication and installation
·
Temporary Grouting
|
|
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 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
|
|
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-RE0632-19
|
27 Aug 2019
|
26 Feb 2020
|
Valid
|
Barging Point
Operation at Kai Tak Barging Point
|
|
GW-RE0740-19
|
20 Sep 2019
|
19 Dec 2019
|
Superseded by GW-RE1013-19
|
Rock Breaking
at Ma Tau Kok
|
|
GW-RE1013-19
|
17 Dec 2019
|
16 Apr 2020
|
Valid on 17
Dec 2019
|
|
GW-RS0524-19
|
5 July 2019
|
4 Jan 2020
|
Superseded by
GW-RE0986-19
|
General Works
at Kai Tak
|
|
GW-RE0986-19
|
6 Dec 2019
|
1 Jun 2020
|
Valid on 6 Dec
2019
|
|
GW-RE0779-19
|
2 Oct 2019
|
1 Jan 2020
|
Superseded by
GW-RE1012-19
|
Welding and
backfilling at Stage 1 Underwater Tunnel
|
|
GW-RE1012-19
|
17 Dec 2019
|
12 Jun 2020
|
Valid on 6 Dec
2019
|
|
Chemical Waste Producer Registration
|
|
5118-247-G2347-47
|
30 Jan 2018
|
End of Project
|
Valid
|
--
|
|
5118-247-G2347-48
|
30 Jan 2018
|
End of Project
|
Valid
|
--
|
|
Marine Dumping Permit
|
|
EP/MD/20-048
|
16 Oct 2019
|
15 Apr 2020
|
Valid
|
Sediments requiring Type 1 - Open Sea Disposal
|
|
EP/MD/20-084
|
8 Nov 2019
|
7-Dec-19
|
Valid until 7 Dec 2019
|
Sediments requiring Type 3 disposal (Filled up by 70%)
|
|
Billing
Account for Construction Waste Disposal
|
|
7029909
|
22 Jan 2018
|
End of Project
|
Account Active
|
--
|
|
7031949
|
14 Oct 2019
|
14 Jan 2020
|
Account New on 14 Oct
2019
|
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
|
--
|
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
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 December 2019 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
3.2.7
The schedule for environmental
monitoring in December 2019 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.
4.1.1 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 November 2019
|
13 December 2019
|
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
|
64.7
|
40.4 – 90.2
|
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
|
63.1
|
57.9 – 70.1
|
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.
5.2.1 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
|
64.3
– 69.6
|
75
|
|
E-N21a
|
63.4
– 68.4
|
75
|
5.2.2
One (1) noise related
complaint was received in the reporting
month. Based on the investigation result, the noise nuisance from the
construction site was minimized with the proper implementation of mitigation
measures. Therefore, one action level of noise was triggered and the
investigation report was finalized on 19 December 2019.
5.2.3
No Limit Level exceedance of
noise was recorded at the monitoring station in the reporting month.
5.2.4
The event and action plan is
annexed in Appendix
I.
5.2.5
Major noise sources during the
monitoring included construction noise from the Project site and nearby traffic
noise.
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 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 6.1.
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.
5.3.3
As advised by the Contractor, Total 38,405 m3 of
inert C&D
material was generated, 36 m3 inert C&D material
was disposed at the Public Fills, 169 m3 was reused in the Contract
and 38,200 m3 was reused in other contract in the reporting month. 48,960 kg general refuse was generated and sent to NENT
Landfill in the reporting month. No metals, plastics and paper/cardboard
packaging were collected by recycle contractor in the reporting month. 800
L of 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.
5.3.4 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.
5.3.5 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.
5.4.1
Bi-weekly inspection
of the implementation of landscape and visual mitigation measures was conducted
on 4 and 18 December 2019. 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.
6.1.1 Site inspections were carried out on a weekly basis to monitor the
implementation of proper environmental pollution control and mitigation
measures for the Project. A summary of the mitigation measures implementation
schedule is provided in Appendix
C.
6.1.2
In the reporting month, 4 site inspections
were carried out on 4, 11, 18
and 24 December
2019. Joint
inspections with the IEC, ER, the Contractor and the ET were conducted on 18 December 2019. In addition, no joint inspection with
EPD, ER and the Contractor was conducted in December 2019 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 6.1.
Table 6.1 Observations and
Recommendations of Site Audit
|
Parameters
|
Date
|
Observations and Recommendations
|
Follow-up
|
|
Air
Quality
|
4 December 2019
|
· Exposed area at Kai Tak Barging Point was observed in dry condition.
The Contractor was reminded to provide regular water spraying for the dust
suppression.
|
The item was
rectified by the Contractor on 5 Dec 2019.
|
|
Reminder:
·
The Contractor was
reminded to provide watering regularly on the stockpile at Kai Tak for dust
suppression.
|
The item was
rectified by the Contractor on 9 Dec 2019.
|
|
Noise
|
24 December 2019
|
·
Operating generator
was observed without erecting sound canvas around it for noise screening at
Ma Tau Kok. The Contractor was reminded to erect a sound canvas around the
generator for noise screening.
|
The item was
rectified by the Contractor on 30 Dec 2019.
|
|
Water
Quality
|
11 December 2019
|
· Oil drums were observed stored without drip tray near chemical waste
storage container of Kai Tak.
|
The item was
rectified by the Contractor on 17 Dec 2019.
|
|
18 December 2019
|
· Oil drums at
Kai Tak was observed without drip tray for storage. The Contractor was
reminded to provide a drip tray for storage to prevent oil spillage.
|
The item was
rectified by the Contractor on 23 Dec 2019.
|
|
24 December 2019
|
Reminder:
· The Contractor was reminded to cover the remaining slope at Land Step
Area for dust suppression.
|
The item was
rectified by the Contractor on 30 Dec 2019.
|
|
Waste/
Chemical Management
|
24 December 2019
|
Reminder:
· The Contractor
was reminded to remove the waste regularly at Kai Tak.
|
The item was
rectified by the Contractor on 30 Dec 2019.
|
|
Land
Contamination
|
Nil
|
Nil
|
Nil
|
|
Landscape
&
Visual
|
Nil
|
Nil
|
Nil
|
|
Permits/
Licenses
|
18 December 2019
|
Reminder:
· The Contractor was
reminded to update the latest version of construction noise permit at the
site entrance of Ma Tau Kok.
|
The item was
rectified by the Contractor on 20 Dec 2019.
|
6.1.3
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.
6.2.1
All 24-hour TSP result was below
the Action and Limit Levels at all monitoring locations in the reporting month.
6.2.2
All 1-hour TSP result was below
the Action and Limit Levels at all monitoring locations in the reporting month.
6.2.3 One (1) noise related complaint
was received in the reporting month. Based on the investigation result, the
noise nuisance from the construction site was minimized with the proper
implementation of mitigation measures. Therefore, one action level of noise was
triggered and the investigation report was finalized on 19 December
2019.
6.2.4
No Limit Level exceedance for
noise was recorded at all monitoring stations in the reporting month.
6.3.1
No environmental non-compliance was
recorded in the reporting month.
6.4.1 One
(1) complaints (received by 1823 on 9 December 2019) were referred by the
Contractor on 10 December 2019, the investigation report was finalized on 19
December 2019. Cumulative statistics on notification of summons and successful
prosecutions is provided in Appendix
J.
6.5
Summary of Environmental
Summon and Successful Prosecutions
6.5.1 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.
7.1.1
The major construction works
between January and
March 2020 is provided in Table 7.1.
Table 7.1 Construction Activities in the coming three months
|
Locations
|
Site Activities
|
|
Kai
Tak
|
·
Base slab and wall construction at underpass
·
Excavation and ELS installation at cut & cover tunnel,
depressed road and underpass
·
Temporary Grouting
·
Backfilling works and ELS removal at Underpass
|
|
Ma
Tau Kok
|
·
TTM implementation
·
Soft and rock excavation
·
ELS installation for access shaft
·
Pipe piling works for cut and cover tunnel
·
Existing drainage diversion works
·
Fresh water pipe installation works
·
Caping construction at Landing Step
·
Cover walkway construction at Landing Step
|
|
Kowloon
Bay
|
·
Excavation for stage 1 underwater tunnel
·
ELS installation
·
Dewatering well and observation well installation
·
Temporary Grouting
·
Pumping Test
|
|
Barging
Point
|
·
Barging point operation (Spoil
Disposal)
|
7.2.1
Potential environmental impacts
arising from the above construction activities are mainly associated with construction dust,
construction noise, and waste management.
7.3.1 The tentative schedule for environmental monitoring in January 2020 is provided in Appendix
F.
8.1.1
24-hour TSP and noise monitoring
were carried out in the reporting month.
8.1.2
All 24-hour TSP monitoring
results complied with the Action / Limit Level at in the reporting month.
8.1.3
All 1-hour TSP result was below
the Action and Limit Levels at all monitoring locations in the reporting month.
8.1.4
One (1) noise related complaint was received in the reporting month.
Based on the investigation result, the noise nuisance from the construction
site was minimized with the proper implementation of mitigation measures.
Therefore, one action level of noise was triggered and the
investigation report was finalized on 19 December 2019.
8.1.5
No Limit Level exceedance for noise was recorded at all monitoring stations in the reporting month.
8.1.6 4 nos. of environmental site inspections and
no site inspections with EPD were carried out in December 2019. Recommendations on remedial actions were given to the
Contractor for the deficiencies identified during the site audit.
8.1.7
One (1) complaints (received by 1823 on 9
December 2019) were referred by the Contractor on 10 December 2019, the
investigation report was finalized on 19 December 2019.
8.1.8
No notification of summons and successful prosecution were received
in the reporting month.
8.2.1
According to the environmental
site inspections performed in the reporting month, the following
recommendations were provided:
Air Quality Impact
· The Contractor was reminded to provide
regular water spraying on the exposed area and stockpile for the dust suppression.
· The Contractor was reminded to cover the
unpaved slope for dust suppression.
Construction Noise Impact
· The Contractor was reminded to erect a sound
canvas around the generator for noise screening.
Water Quality Impact
· The Contractor was reminded to provide a drip
tray for storage to prevent oil spillage.
Chemical and Waste Management
· The Contractor was reminded to remove the
waste regularly.
Landscape & Visual Impact
· No specific observation was identified in the
reporting month.
Permits/licenses
· The Contractor was reminded to update the
latest version of construction noise permit at the site entrance.
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