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-second monthly EM&A Report presenting the EM&A works carried out
during the period between 1 and 31 January 2020. 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;
·
Pipe piling works for cut and cover tunnel;
·
Soft Excavation and Rock Excavation;
·
ELS installation & decking works for access shaft;
·
Existing drainage diversion works;
·
Caping Construction at Landing Step
|
|
Kowloon Bay
|
·
Excavation for Stage 1 underwater tunnel;
·
Dewatering well and observation well installation;
·
S1 Truss fabrication and installation;
·
Temporary Grouting;
·
Pumping Test
|
|
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 and air 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 22 January 2020.
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 Gammon Construction Limited on 9 January 2020) were
referred by the Contractor on 10 January 2020, the investigation report was
finalized on 22 January 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 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-second monthly EM&A Report
which summarizes the impact monitoring results and audit
findings for the Project during the reporting period between 1 and 31
January 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
|
·
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;
·
Pipe piling works for cut and cover tunnel;
·
Soft Excavation and Rock Excavation;
·
ELS installation & decking works for access shaft;
·
Existing drainage diversion works;
·
Caping Construction at Landing Step
|
|
Kowloon
Bay
|
·
Excavation for Stage 1 underwater tunnel;
·
Dewatering well and observation well installation;
·
S1 Truss fabrication and installation;
·
Temporary Grouting;
·
Pumping Test
|
|
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-RE1013-19
|
17 Dec 2019
|
14 Apr 2020
|
Valid
|
Rock Breaking
at Ma Tau Kok
|
|
GW-RE0986-19
|
6 Dec 2019
|
1 Jun 2020
|
Valid
|
General Works
at Kai Tak
|
|
GW-RE1012-19
|
17 Dec 2019
|
12 Jun 2020
|
Valid
|
Welding and backfilling
at Stage 1 Underwater Tunnel
|
|
Chemical Waste Producer Registration
|
|
5118-247-G2347-47
|
30 Jan 2018
|
End of Project
|
Valid
|
--
|
|
5118-247-G2347-48
|
30 Jan 2018
|
End of Project
|
Valid
|
--
|
|
Marine Dumping Permit
|
|
EP/MD/20-048
|
16 Oct 2019
|
15 Apr 2020
|
Valid
|
Sediments requiring Type 1 - Open Sea Disposal
|
|
EP/MD/20-092
|
3 Jan 2020
|
2 Feb 2020
|
Valid on 3 Jan 2020
|
Sediments requiring Type 1
(Dedicated Site) and Type 2 Confined Marine Disposal
|
|
Billing
Account for Construction Waste Disposal
|
|
7029909
|
22 Jan 2018
|
End of Project
|
Account Active
|
--
|
|
7031949
|
14 Oct 2019
|
14 Jan 2020
|
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
|
--
|
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 January 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
3.2.7
The schedule for environmental
monitoring in January 2020 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 December 2019
|
14 January 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
|
46.4
|
23.7 – 65.9
|
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
|
63.0
|
58.5 – 67.9
|
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
|
61.5
– 65.8
|
75
|
|
E-N21a
|
62.3
– 63.9
|
75
|
5.2.2
One (1) noise and air 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 22 January 2020.
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 35,402 m3 of
inert C&D
material was generated, 31 m3 inert C&D material
was disposed at the Public Fills, 35,371 m3 was reused in other
contract in the reporting month. 21,510 kg
general
refuse was generated and sent to NENT Landfill in the
reporting month.
180 kg of paper/cardboard packaging, no metals, plastics were collected by
recycle contractor in the reporting month. No chemical waste was
collected by licensed contractor in the reporting period.
309 m3 of Type 2, no Type 1 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 2, 15 and 29 January 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.
6.1.1 Site inspections were carried out on a weekly basis to monitor the
implementation of proper environmental pollution control and mitigation
measures for the Project. A summary of the mitigation measures implementation
schedule is provided in Appendix C.
6.1.2
In the reporting month, 5 site inspections
were carried out on 2, 8, 15, 22
and 29 January 2020. Joint inspections with the IEC, ER, the
Contractor and the ET were conducted on 15 January 2020. In addition, no joint inspection with
EPD, ER and the Contractor was conducted in January 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 6.1.
Table 6.1 Observations and Recommendations
of Site Audit
|
Parameters
|
Date
|
Observations and Recommendations
|
Follow-up
|
|
Air
Quality
|
2 January 2020
|
Reminder:
· The Contractor was reminded to improve the coverage of the stockpile
at Kai Tak for dust suppression.
|
The item was
rectified by the Contractor on 6 Jan 2020.
|
|
15 January 2020
|
Reminder:
· The Contractor was reminded to affix the proper NRMM label for drill rig
after the routine check at Ma Tau Kok.
|
The item was
rectified by the Contractor on 16 Jan 2020.
|
|
Noise
|
Nil
|
Nil
|
Nil
|
|
Water
Quality
|
2 January 2020
|
Reminder:
· The Contractor was reminded to erect the bunding along site boundary
of Landing Step Area to prevent muddy water seepage run out from site.
|
The item was
rectified by the Contractor on 6 Jan 2020.
|
|
22 January 2020
|
· Chemicals were observed
stored without drip tray at Ma Tau Kok and
underpass of the Kai Tak. The Contractor was
reminded to provide the drip tray for chemicals to prevent accidental
spillage.
|
The item was
rectified by the Contractor on 29 Jan 2020.
|
|
29 January 2020
|
· Oil stain was
observed near the uninstall breaker’s head at Ma Tau Kok.
The Contractor was reminded to clean up the oil stain in timely manner.
|
This item will
be followed up in next reporting period.
|
|
· Oil drum was
observed stored without secondary containment for accidental spillage
prevention at Access Shaft of Kai Tak. The
Contractor was reminded to provide the secondary containment for oil drum.
|
This item will
be followed up in next reporting period.
|
|
Waste/
Chemical Management
|
22 January 2020
|
· General refuse was accumulated at Landing Step. The Contractor was
reminded to remove the general refuse regularly to avoid accumulation.
|
The item was
rectified by the Contractor on 24 January 2020.
|
|
Land
Contamination
|
Nil
|
Nil
|
Nil
|
|
Landscape
&
Visual
|
Nil
|
Nil
|
Nil
|
|
Permits/
Licenses
|
Nil
|
Nil
|
Nil
|
6.1.3
No follow up
action was requested by ET during the site inspection on 8 January 2020.
6.1.4
Most 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 and air
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 22 January
2020.
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 Gammon Construction Limited on 9 January
2020) were referred by the Contractor on 10 January 2020, the investigation
report was finalized on 22 January 2020. 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 February and
April 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 February 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 and air 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 22 January 2020.
8.1.5
No Limit Level exceedance for noise was recorded at all monitoring stations in the reporting month.
8.1.6 5 nos. of environmental site inspections and
no site inspections with EPD were carried out in January 2020. 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
Gammon Construction Limited on 9 January 2020) were referred by the Contractor
on 10 January 2020, the investigation report was finalized on 22
January 2020.
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 improve the
coverage of the stockpile for dust suppression .
· The Contractor was reminded to affix the
proper NRMM label for drill rig after the routine check .
Construction Noise Impact
· No specific observation was identified in the
reporting month.
Water Quality Impact
· The Contractor was reminded to erect the
bunding along site boundary to prevent muddy water seepage run out from site.
· The Contractor was reminded to provide the
drip tray for chemicals and oil drum to prevent accidental spillage.
· The Contractor was reminded to clean up the
oil stain in timely manner.
Chemical and Waste Management
· The Contractor was reminded to remove the
general refuse regularly to avoid accumulation.
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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