Executive
summary
Apex Testing & Certification Limited (Apex) was commissioned to
undertake the Environmental Team (ET) services (including environmental
monitoring and audit (EM&A)) for the construction activities in Zone 2A at
WKCD, consisting of Foundation, Excavation and Lateral Support Works for
Integrated Basement and Underground Road (Contract No.: GW/2020/05/073).
The construction works and EM&A programme for Zone 2A commenced on 3
October 2020.
The Project Proponent is the West Kowloon Cultural District Authority
(WKCDA). The overall works for the WKCD fall under two
separate categories of Designated Project (DP) of the Environmental Impact
Assessment Ordinance (EIAO), namely an “engineering feasibility study of urban
development projects with a study area covering more than 20 ha or involving a
total population of more than 100 000” (Item 1 of Schedule 3) and “an underpass
more than 100m in length under the built areas” (Item A.9, Part I, Schedule 2).
An Environmental Permit No. EP-453/2013/B (EP) was issued with respect to the
“Underpass Road and Austin Road Flyover Serving the West Kowloon Cultural
District” which specifically includes the abovementioned category of DP under
Item A.9, Part I, Schedule 2 of the EIAO.
This Monthly EM&A Report presents the
monitoring works at Zone 2A from
1 to 31 July 2021.
Exceedance of Action and Limit Levels
There was no breach of Action or Limit levels for Air Quality
(1-hour TSP and 24-hour TSP) and Construction Noise monitoring in this
reporting month.
Implementation of
Mitigation Measures
Construction phase weekly site inspections
were carried out on 02, 08, 15, 22 and 29 July 2021
for Foundation, Excavation and Lateral Support Works in Zone 2A to confirm the implementation measures undertaken by the Contractors
in the reporting month. The outcomes are presented in Section 4 and the status
of implementation of mitigation measures in the site is shown in Appendix J.
Landscape and visual impact inspections were conducted as part of
the abovementioned weekly site inspections during the reporting month. No
adverse comment on landscape and visual aspects was made during these
inspections.
FEHD inspection was conducted at Zone 2A on 14, 21 and 26 July
2021.
EPD inspection was conducted at Zone 2A on 30 July 2021.
Record of Complaints
One environmental complaint was recorded in the reporting month.
Record of Notifications
of Summons and Successful Prosecutions
No notifications of summons and successful prosecutions were
recorded in the reporting month.
Future Key Issues
The major site works for Zone 2A scheduled to be commissioned in the
coming month include:
Zone 2A-1
●
Grouting Works (Trial 1)
–
Install Pump Wells
–
Pumping Test
●
ELS (Stage 1) – Grouting / Pipe Pile Works
–
King Post & Erection of Steel Column for
Working Platform
●
Socketed H-Pile Works
–
Remaining Socket H-Pile Works
●
Bored Pile Works
–
Bored Pile Construction
Zone 2A-2
●
Bored Pile Works
– Additional
Bored Pile Construction
●
ELS (Stage 1) – Grouting / Pipe
Pile Works
–
King Post
–
Stage 1a & 1b Grouting
–
Pipe Pile Construction
Potential environmental impacts due to the construction activities,
including air, noise, water quality, waste, landscape and visual, will be
monitored or reviewed. The recommended environmental mitigation measures shall
be implemented on site and regular inspections as required will be carried out
to ensure that the environmental conditions are acceptable.
Apex Testing & Certification Limited (Apex) was commissioned to
undertake the Environmental Team (ET) services (including environmental
monitoring and audit (EM&A)) for the construction activities in Zone 2A at
WKCD, consisting of Foundation, Excavation and Lateral Support Works for
Integrated Basement and Underground Road (Contract No.: GW/2020/05/073). The
purpose of the development in Zone 2A is to reserve for Integrated Basement
(IB) and Underground Road (UR). The Zone 2A construction activities involve the
foundation, excavation and lateral support (ELS) works, road works, drainage
diversion works, and temporary car parking. The construction works and EM&A
programme for Zone 2A commenced on 3 October 2020.
The overall works for the WKCD fall under two separate categories of
Designated Project (DP) of the Environmental Impact Assessment Ordinance
(EIAO), namely an “engineering feasibility study of urban development projects
with a study area covering more than 20 ha or involving a total population of
more than 100 000” (Item 1 of Schedule 3) and “an underpass more than 100m in
length under the built areas” (Item A.9, Part I, Schedule 2). An Environmental
Permit No. EP-453/2013/B (EP) was issued with respect to the “Underpass Road
and Austin Road Flyover Serving the West Kowloon Cultural District” which specifically
includes the abovementioned category of DP under Item A.9, Part I, Schedule 2
of the EIAO. The captioned projects include part of the abovementioned
underpass road located within the site boundary falls under this same category.
The Monthly EM&A Report is
prepared in accordance with the Condition 3.4 of the Environmental Permit No.
EP-453/2013/B. This Monthly EM&A Report presents
the monitoring works at Zone 2A from 1 to 31 July 2021. The purpose of this report is to
summarise the findings in the EM&A of the project over the reporting
period.
The
organisation chart and lines of communication with respect to the on-site
environmental management structure together with the contact information of the
key personnel are shown in Appendix
A.
During the reporting period, construction works at Zone 2A
undertaken include:
Zone 2A-1
●
Grouting Works (Trial 1)
–
Install Pump Wells
–
Pumping Test
●
ELS (Stage 1) – Grouting / Pipe
Pile Works
–
King Post & Erection of Steel Column for
Working Platform
●
Socketed H-Pile Works
–
Remaining Socketed H-Pile Works
●
Bored Pile Works
–
Bored Pile Construction
Zone 2A-2
●
Bored Pile Works
– Additional
Bored Pile Construction
●
ELS (Stage 1) – Grouting / Pipe
Pile Works
–
Stage 1a & 1b Grouting
–
Pipe Pile Construction
The Construction Works Programme of Zone 2A is
provided in Appendix B. A
layout plan of the Project is provided in Figure
1.
Please refer to Table 4.2 on the status of the environmental
licenses.
1.4
Summary of EM&A Requirements and Alternative Monitoring Locations
The EM&A programme requires environmental monitoring of air
quality, noise, landscape and visual as specified in the approved EM&A Manual.
A summary of impact EM&A requirements
is presented in Table 1.1.
Table 1.1: Summary
of Impact EM&A Requirements
|
Parameters
|
Descriptions
|
Locations
|
Frequencies
|
|
Air Quality
|
24-Hours TSP
|
AM3-The Victoria Towers Tower 1
|
At least once every 6 days
|
|
1-Hour TSP
|
AM3-The Victoria Towers Tower 1
|
At least 3 times every 6 days
|
|
24-Hours TSP
|
AM4-Canton Road Government Primary School
|
At least once every 6 days
|
|
1-Hour TSP
|
AM4-Canton Road Government Primary School
|
At least 3 times every 6 days
|
|
24-Hours TSP
|
AM5-Topside Developments at West Kowloon Terminus Site
|
At least once every 6 days
|
|
1-Hour TSP
|
AM5-Topside Developments at West Kowloon Terminus Site
|
At least 3 times every 6 days
|
|
Noise
|
Leq, 30 minutes
|
NM2-The Arch, Sun Tower
|
Weekly
|
|
Leq, 30 minutes
|
NM3-The Victoria Towers Tower 1
|
Weekly
|
|
Leq, 30 minutes
|
NM4-Canton Road Government Primary School
|
Weekly
|
|
Leq, 30 minutes
|
NM5-Development next to Austin Station
|
Weekly
|
|
Landscape & Visual
|
Monitor implementation of proposed mitigation measures during the
construction stage
|
As described in Table 9.1 and 9.2 of the EM&A Manual
|
Bi-Weekly
|
The EM&A programme for the Project should require 5 noise monitoring
station and 5 air quality monitoring stations located closest to the Project
area. With regard to the
monitoring activities at M+ Museum and the Lyric Complex, three monitoring
stations had been considered, including AM1 (International Commerce Centre),
AM2 (The Harbourside Tower 1) for air monitoring, and NM1 (The Harbourside
Tower 1) for noise monitoring.
In the context of the construction
activities in Zone 2A, all other monitoring locations including AM3 (The Victoria Towers Tower 1), AM4 (Canton Road Government Primary
School), and AM5 (Topside Developments at West Kowloon Terminus
Site) for air monitoring; and NM2 (The Arch, Sun
Tower), NM3 (The Victoria Towers Tower 1), NM4 (Canton Road Government Primary
School) and NM5 (Development next to Austin Station) for noise
monitoring, have
been taken into account. However, access to all these originally designated
monitoring stations was declined as described below point-by-point.
The Arch management office and owners’
committee have formally declined the proposal of setting up noise monitoring
instrument on its premises at the podium level of Sun Tower (NM2) on 24 July
2014. Thus, alternative
noise monitoring location was identified at the ground floor in front of The Arch – Sun Tower (NM2A),
which is at the same location as stated in the EM&A Manual for consistency. No management
approval is required at the ground floor for conducting the noise monitoring. This alternative air monitoring location was approved by EPD on 29
September 2020.
The Victoria Towers management
office formally declined the proposal of setting up air
quality and noise monitoring instruments on its premises at the podium area
of Tower 1 (AM3/NM3) on 16 June 2020. Alternative air monitoring location was
identified at ground floor at the Northeast corner of West Kowloon Station’s
station box (AM3A), in the same direction to the area of major construction
site activities in Zone 2A. This alternative air monitoring location was
approved by EPD on 29 September 2020. An alternative noise monitoring location
was identified at the ground floor in front of the Xiqu
Centre (NM3A), which is set closer to the construction site boundary with more
direct line sight to the major site activities and higher exposure to the
construction noise with no disturbance to the premises’ occupants during noise
monitoring activities. No management approval is required at the ground floor
for conducting the noise monitoring. This alternative air monitoring location
was approved by EPD on 29 September 2020.
Canton Road Government Primary
School formally declined the proposal of setting up air
quality and noise monitoring instruments on its premise at the podium level (AM4/NM4) on 16 June 2020. Alternative air monitoring
location was identified at ground floor at the Southeast corner of West Kowloon Station’s station box
(AM4A), in same direction to the area of major construction site activities in
Zone 2A. This alternative air monitoring location was approved by EPD on 29
September 2020. An alternative noise monitoring
location was identified at the ground floor next to Tsim Sha Tsui Fire
Station (NM4A), which is set closer to the construction site boundary
with more direct line sight to the major site activities and higher exposure to
the construction noise with no disturbance to the premises’ occupants during noise monitoring
activities. No management approval is required at the ground floor for
conducting the noise monitoring. This alternative air monitoring location was
approved by EPD on 29 September 2020.
MTR also formally declined the
access to the designated AM5 location (topside developments at West Kowloon
Terminus Site) on 15 July 2020. Alternative air monitoring location was
identified at ground floor at the North
of West Kowloon Station’s station box (AM5A), in same direction
to the area of major construction site activities in Zone 2A. This alternative
air monitoring location was approved by EPD on 29 September 2020.
Grand Austin property management
office formally declined our proposal of setting up noise monitoring instrument on its premises at the podium
level (NM5) on 10 July 2020. Alternative noise monitoring location was
identified at the Pedestrian road (ground floor) outside West Kowloon Station
(NM5A), which is set closer to the
construction site boundary with more direct line sight to the major site
activities and higher exposure to the construction noise with no disturbance to
the premises’ occupants during noise monitoring activities. No management
approval is required at the ground floor for conducting the noise monitoring.
This alternative air monitoring location was approved by EPD on 29 September
2020.
The Environmental Quality Performance Limits for air quality and
noise are shown in Appendix
C.
The Event and Action Plan for air quality, construction noise, and landscape and visual are shown in Appendix D.
The EM&A programme followed
the recommended mitigation measures in the EM&A Manual. The EM&A
requirements as well as the summary of implementation status of the
environmental mitigation measures are provided in Appendix J.
Air quality and noise monitoring
methodology, including the monitoring locations, equipment used, parameters, frequency
and duration etc., are described in this Section. The environmental monitoring
schedules for the reporting period and the tentative monitoring Schedule for
the coming month are provided in Appendix
E.
The relevant EM&A monitoring
requirements and details for landscape and audit impact, are also presented in
this Section.
Table 2.1 summarizes the monitoring
parameters, frequency and duration of the TSP monitoring.
Table
2.1: Air
Quality Monitoring Parameters, Frequency and Duration
|
Parameter
|
Frequency
|
Duration
|
|
24-hour TSP
|
At least once in every six-days
|
24 hours
|
|
1-hour TSP
|
At least 3 times every six-days
|
60 minutes
|
2.2.2
Monitoring Locations
Monitoring
stations and locations are given in Table
2.2
and shown in Figure 1.
Table 2.2: Air Quality
Monitoring Station
|
Monitoring Station
|
Location Description
|
|
AM3A
|
Northeast corner of West Kowloon Station’s station box
(G/F)
|
|
AM4A
|
Southeast corner of West Kowloon Station’s station box
(G/F)
|
|
AM5A
|
North of West Kowloon Station’s station box (G/F)
|
2.2.3
Monitoring Equipment
Continuous 24-hour TSP air quality monitoring was conducted using
High Volume Sampler (HVS) (Model: TE-5170) located at the designated monitoring
station. The HVS meets all the requirements stated in of the EM&A Manual.
Portable direct reading dust meter was used to carry out the 1-hour TSP
monitoring. Table 2.3 summarizes the equipment used in the
impact air quality monitoring. Copies of the calibration certificates for the
HVS, calibration kit and portable dust meters are attached in Appendix F.
Table 2.3: TSP
Monitoring Equipment
|
Equipment
|
Model
|
|
24-hour TSP monitoring
|
|
High Volume Sampler
|
TE-5170 (Serial No.: 4340; 3998; 4344)
|
|
Calibrator
|
TE-5025A (Orifice I.D.: 3543)
|
|
1-hour TSP monitoring
|
|
Portable direct reading dust meter
|
Sibata LD-3B (Serial No.: 235811,
336338, 567188)
|
Calibration of the HVS (five-point
calibration) using Calibration Kit was carried out every two months. The HVS
calibration orifice will be calibrated annually. Calibration certificate of the
TE-5025A Calibration Kit and the HVS are provided in Appendix F.
The 1-hour TSP monitoring
should be determined periodically (e.g. annually) by the HVS to check the
validity and accuracy of the results measured by direct reading method.
24-hour TSP Monitoring
Installation
The HVS was installed at the site boundary. The following criteria
were considered in the installation of the HVS.
–
A horizontal platform with
appropriate support to secure the sampler against gusty wind was provided.
–
The distance between the HVS
and any obstacles, such as buildings, was at least twice the height that the
obstacle protrudes above the HVS.
–
A minimum of 2 metres
separation from walls, parapets and penthouse was required for rooftop sampler.
–
A minimum of 2 metres separation
from any supporting structure, measured horizontally was required.
–
No furnace or incinerator flues
or building vent were nearby.
–
Airflow around the sampler was
unrestricted.
–
The sampler has been more than
20 metres from any drip line.
–
Permission was obtained to set
up the sampler and to obtain access to the monitoring station.
–
A secured supply of electricity
is needed to operate the sampler.
Preparation of Filter
Papers
–
Glass fibre filters were
labelled and sufficient filters that were clean and without pinholes were
selected.
–
The filters used are specified
to have a minimum collection efficiency of 99 percent for 0.3 µm (DOP)
particles.
–
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
with relative humidity (RH) < 50% and was not variable by more than ±5
%. A convenient working RH was 40%. All preparation of filters was done by Hong Kong Laboratory Accreditation Scheme (HOKLAS) accredited laboratory.
Field Monitoring
Procedures
–
The power supply was checked to
ensure the HVS works properly.
–
The filter holder and the area
surrounding the filter were cleaned.
–
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.
–
The filter was properly aligned
on the screen so that the gasket formed an airtight seal on the outer edges of
the filter.
–
The swing bolts were fastened
to hold the filter holder down to the frame. The pressure applied should be
sufficient to avoid air leakage at the edges.
–
The shelter lid was closed and
was secured with the aluminium strip.
–
The HVS was warmed-up for about
5 minutes to establish run-temperature conditions.
–
A new flow rate record sheet
was set into the flow recorder.
–
The flow rate of the HVS was
checked and adjusted at around 1.3 m3/min. The range specified in the
EM&A Manual was between 0.6-1.7 m3/min.
–
The programmable timer was set
for a sampling period of 24 hours, and the starting time, weather condition and
the filter number were recorded.
–
The initial elapsed time was
recorded.
–
At the end of sampling, the
sampled filter was removed carefully and folded in half
length so that only surfaces with collected particulate matter were in
contact.
–
It was then placed in a clean
plastic envelope and sealed.
–
All monitoring information was
recorded on a standard data sheet.
–
Filters were sent to a Hong
Kong Laboratory Accreditation Scheme (HOKLAS) accredited laboratory for
analysis.
Maintenance and
Calibration
–
The HVS and its accessories are
maintained in good working condition, such as replacing motor brushes routinely
and checking electrical wiring to ensure a continuous power supply.
–
HVSs were calibrated upon installation
and thereafter at bi-monthly intervals. The calibration kits were calibrated
annually.
–
Calibration
records for HVS and calibration kit are shown in Appendix F.
1-hour TSP Monitoring
Field Monitoring
The measuring procedures of the 1-hour dust meter are in accordance with
the Manufacturer’s Instruction Manual as follows:
–
Turn the power on.
–
Close the air collecting
opening cover.
–
Push the “TIME SETTING” switch
to [BG].
–
Push “START/STOP” switch to
perform background measurement for 6 seconds.
–
Turn the knob at SENSI ADJ position
to insert the light scattering plate.
–
Leave the equipment for 1
minute upon “SPAN CHECK” is indicated in the display.
–
Push “START/STOP” switch to
perform automatic sensitivity adjustment. This measurement takes 1 minute.
–
Pull out the knob and return it
to MEASURE position.
–
Setting time period of 1 hour for the 1-hour TSP
measurement.
–
Push
“START/STOP” to start the 1-hour TSP measurement.
–
Regular checking of the time period setting to ensure monitoring time of
1 hour.
Maintenance and Calibration
–
The 1-hour dust meter would be
checked at 3-month intervals and calibrated at 1-year intervals throughout all
stages of the air quality monitoring.
–
Calibration records for direct
dust meters are shown in Appendix F.
Weather Condition
–
Meteorological data extracted
from Hong Kong Observatory for the reporting month is provided in Appendix H.
Table 2.4 summarizes the monitoring parameters, frequency and duration of
noise monitoring. The noise in A-weighted levels Leq,
L10 and L90 are recorded in a 30-minute interval between
0700 and 1900 hours.
Table 2.4: Noise Monitoring
Parameters, Period and Frequency
|
Time Period
|
Parameters
|
Frequency
|
|
Daytime
on normal weekdays
(0700-1900
hours)
|
Leq(30 min), L90(30 min) & L10(30
min)
|
Once
every week
|
Note: *70 dB(A) for
schools and 65 dB(A) during school examination periods.
If works are to be carried out during restricted hours, the conditions
stipulated in the Construction Noise Permit (CNP) issued by the Noise Control
Authority have to be followed.
Noise monitoring stations and locations are given in Table
2.5 and shown in Figure 1.
Table 2.5: Noise
Monitoring Station
|
Monitoring Station
|
Location
|
|
NM2A
|
The Arch – Sun
Tower (G/F)
|
|
NM3A
|
Xiqu Centre (G/F)
|
|
NM4A
|
Next to Tsim Sha Tsui Fire Station (G/F)
|
|
NM5A
|
Pedestrian road (G/F) outside West Kowloon
Station
|
2.3.3
Monitoring Equipment
Integrating Sound Level
Meter was used for noise monitoring. It was a Type 1 sound level meter capable
of giving a continuous readout of the noise level readings including equivalent
continuous sound pressure level (LAeq) and percentile
sound pressure level (Lx). They comply with International
Electrotechnical Commission Publications 651:1979 (Type 1) and 804:1985 (Type
1). Table 2.6 summarizes the noise monitoring equipment model being used.
Table 2.6: Noise
Monitoring Equipment
|
Equipment Model
|
|
|
Integrating Sound Level Meter
|
Calibrator
|
|
AWA5661 (Serial No.: 301135)
|
Pulsar 100B (Serial No.: 039507)
|
2.3.4
Monitoring Methodology
Field Monitoring
–
The microphone of the Sound
Level Meter was set at least 1.2 m above the ground.
–
Free Field measurement was made
at NM5A monitoring location.
–
The battery condition was
checked to ensure the correct functioning of the meter.
–
Parameters such as frequency
weighting, the time weighting and the measurement time were set as follows:
- frequency weighting:
A
- time weighting: Fast
- time measurement: 30
minutes intervals (between 0700-1900 on normal
weekdays)
–
Prior to and after each noise
measurement, the meter was calibrated using a Calibrator for 94 dB at 1
kHz. If the difference in the
calibration level before and after measurement was more than 1 dB, the
measurement would be considered invalid and has to be repeated after re-calibration or repair of the equipment.
–
During the monitoring period,
the Leq, L10 and L90
were recorded. In addition, any
site observations and noise sources were recorded on a standard record sheet.
–
A correction of +3dB(A) was
made to the free field measurements.
Maintenance and Calibration
–
The microphone head of the
sound level meter and calibrator is cleaned with soft cloth at quarterly
intervals.
–
The sound level meter and
calibrator are sent to the supplier or HOKLAS laboratory to check and calibrate
at yearly intervals.
–
Calibration records are shown
in Appendix F.
Weather Condition
–
Meteorological data extracted
from Hong Kong Observatory for the reporting month is provided in Appendix H.
2.4
Landscape and Visual
Table
2.7 details the monitoring program (as
proposed in the WKCD EIA report) for landscape and visual impact during the
construction phase.
Table 2.7: Monitoring Program
for Landscape and Visual Impact during Construction Phase
|
Stage
|
Monitoring
Task
|
Frequency
|
Report
|
Approval
|
|
Construction
|
Monitor implementation of proposed mitigation
measures during the construction stage.
|
Bi-weekly
|
ET to report on Contractor’s compliance
|
Counter-signed by IEC
|
During the landscape and visual impact monitoring, any changes in
relation to the landscape and visual amenity should be monitored with reference
to the baseline conditions of the site. In addition, mitigation measures were
proposed in the WKCD EIA report to minimise the landscape and visual impacts
during the construction phase. The proposed mitigation measures as shown in
Table 9.1 and Table 9.2 of the EM&A Manual should be checked for proper
implementation.
Air quality, noise
and landscape and visual impact
monitoring was undertaken in compliance
with the EM&A Manual during the reporting
month.
3.2
Air Quality Monitoring
Results of 1-hour TSP are summarised in Table 3.1.
Graphical plots of the monitoring results are shown in Appendix G.
Table 3.1: Summary
of 1-hour TSP monitoring results
|
Monitoring Station
|
Monitoring Date
|
Start Time
|
1-hour TSP (μg/m3)
|
Range (μg/m3)
|
Action Level (μg/m3)
|
Limit Level (μg/m3)
|
|
1st Result
|
2nd Result
|
3rd Result
|
|
AM3A
|
02-Jul-21
|
8:02
|
57
|
50
|
50
|
31-57
|
280.4
|
500
|
|
08-Jul-21
|
14:07
|
46
|
45
|
43
|
|
14-Jul-21
|
8:10
|
33
|
40
|
37
|
|
20-Jul-21
|
14:15
|
31
|
31
|
35
|
|
26-Jul-21
|
8:12
|
31
|
34
|
32
|
|
31-Jul-21
|
14:09
|
41
|
39
|
47
|
|
AM4A
|
02-Jul-21
|
8:10
|
48
|
57
|
53
|
31-57
|
278.5
|
500
|
|
08-Jul-21
|
14:15
|
39
|
47
|
42
|
|
14-Jul-21
|
8:18
|
31
|
34
|
35
|
|
20-Jul-21
|
14:23
|
35
|
36
|
38
|
|
26-Jul-21
|
8:20
|
37
|
40
|
40
|
|
31-Jul-21
|
14:17
|
46
|
45
|
46
|
|
AM5A
|
02-Jul-21
|
8:25
|
53
|
48
|
57
|
33-57
|
275.4
|
500
|
|
08-Jul-21
|
14:32
|
42
|
44
|
46
|
|
14-Jul-21
|
8:33
|
38
|
36
|
34
|
|
20-Jul-21
|
14:40
|
40
|
40
|
36
|
|
26-Jul-21
|
8:35
|
33
|
39
|
34
|
|
31-Jul-21
|
14:25
|
40
|
42
|
41
|
3.2.2
24-hour TSP
Results of 24-hour TSP are summarised in Table 3.2.
Graphical plots of the monitoring results are shown in Appendix G.
Table 3.2: Summary
of 24-hour TSP monitoring results
|
Monitoring Station
|
Monitoring Date
|
Start Time
|
Monitoring Results (μg/m3)
|
Range (μg/m3)
|
Action Level (μg/m3)
|
Limit Level (μg/m3)
|
|
AM3A
|
02-Jul-21
|
10:00
|
49.0
|
32.2-49.0
|
152.4
|
260
|
|
08-Jul-21
|
10:00
|
41.6
|
|
14-Jul-21
|
10:00
|
32.5
|
|
20-Jul-21
|
10:00
|
32.4
|
|
26-Jul-21
|
10:00
|
32.2
|
|
31-Jul-21
|
10:00
|
39.3
|
|
AM4A
|
02-Jul-21
|
10:00
|
46.3
|
31.7-46.9
|
152.6
|
260
|
|
08-Jul-21
|
10:00
|
39.0
|
|
14-Jul-21
|
10:00
|
31.7
|
|
20-Jul-21
|
10:00
|
33.5
|
|
26-Jul-21
|
10:00
|
35.0
|
|
31-Jul-21
|
10:00
|
46.9
|
|
AM5A
|
02-Jul-21
|
10:00
|
49.6
|
31.3-49.6
|
141.1
|
260
|
|
08-Jul-21
|
10:00
|
42.6
|
|
14-Jul-21
|
10:00
|
35.9
|
|
20-Jul-21
|
10:00
|
36.1
|
|
26-Jul-21
|
10:00
|
31.3
|
|
31-Jul-21
|
10:00
|
37.8
|
No exceedance of 1-hour and 24-hour TSP
(Action or Limit Level) was recorded in the reporting period.
The construction noise
monitoring results are summarized in Table 3.3. Graphical plots of the monitoring data and the station set-up as façade
and free-field measurements are shown in Appendix G.
Table 3.3: Summary
of noise monitoring results during normal weekdays
|
Monitoring
Stations
|
Monitoring
Date
|
Start Time
|
End Time
|
Leq
(30 mins) dB(A)
|
Limit Level
for Leq (dB(A))
|
|
NM2A
|
02-Jul-21
|
08:32
|
09:02
|
58.7
|
75
|
|
08-Jul-21
|
14:37
|
15:07
|
59.3
|
|
14-Jul-21
|
08:40
|
09:10
|
58.6
|
|
20-Jul-21
|
14:45
|
15:15
|
58.2
|
|
26-Jul-21
|
08:42
|
09:12
|
58.9
|
|
31-Jul-21
|
14:09
|
14:39
|
58.4
|
|
NM3A
|
02-Jul-21
|
10:02
|
10:32
|
69.5
|
75
|
|
08-Jul-21
|
16:10
|
16:40
|
70.5
|
|
14-Jul-21
|
10:10
|
10:40
|
69.9
|
|
20-Jul-21
|
16:18
|
16:48
|
69.8
|
|
26-Jul-21
|
10:12
|
10:42
|
70.0
|
|
31-Jul-21
|
15:51
|
16:21
|
69.6
|
|
NM4A
|
02-Jul-21
|
10:37
|
11:07
|
67.4
|
70/65^#
|
|
08-Jul-21
|
16:45
|
17:15
|
68.1
|
|
14-Jul-21
|
10:45
|
11:15
|
67.6
|
|
20-Jul-21
|
16:53
|
17:23
|
68.2
|
|
26-Jul-21
|
10:47
|
11:17
|
68.2
|
|
31-Jul-21
|
16:26
|
16:56
|
68.0
|
|
NM5A*
|
02-Jul-21
|
09:22
|
09:52
|
65.6
|
75
|
|
08-Jul-21
|
15:29
|
15:59
|
65.3
|
|
14-Jul-21
|
09:30
|
10:00
|
65.3
|
|
20-Jul-21
|
15:37
|
16:07
|
65.3
|
|
26-Jul-21
|
09:32
|
10:02
|
65.9
|
|
31-Jul-21
|
15:10
|
15:40
|
65.9
|
|
Remarks:
* +3dB (A) correction was applied to free-field
measurement.
^
70 dB(A) for schools and 65 dB(A) during school examination
periods.
# No School examination was conducted during the reporting period.
|
No exceedance (Action or Limit
Level) of construction noise was recorded in the reporting period.
Construction works
were extended to 1900-2300 hours on 02 to 03, 05 to 10, and 19 to 24 July 2021;
and 2300-0700 hours on 19 to 24 July 2021. In accordance with the EM&A
Manual, additional monitoring was carried out during the restricted hours on 02,
08, and 20 July 2021. The Leq (5 mins) is
in the range of 51.0-67.0 dB(A). Construction Noise Permits for the works
carried out during restricted hours were obtained and listed in Table
4.2.
3.4
Landscape and Visual Impact
Landscape and visual impact inspections were conducted as part of
the weekly site inspections on 08 and 22 July 2021 for Zone 2A during the
reporting month. As reviewed by the registered Landscape Architect, no adverse
comment on landscape and visual aspects was made during these inspections.
The landscape and visual mitigation measures were implemented during
the reporting period. The summary of implementation status of the environmental mitigation
measures is provided in Appendix J.
Construction phase weekly site
inspections were carried out on 02, 08, 15, 22 and 29 July 2021. The joint site
inspection with IEC, ET, ER and Contractor was held on 15 July 2021. All
observations have been recorded in the site inspection checklist and passed to
the Contractor together with the appropriate recommended mitigation measures
where necessary.
FEHD inspection was conducted at
Zone 2A on 14 July 2021. No prosecution or warning was given. The FEHD
inspector mainly focused on mosquito prevention measures. FEHD inspector reminded
that water barriers shall checked regularly to avoid stagnant water caused by
cracking/damage of water barrier and recommend mosquito fogging shall conducted
at least twice per month.
FEHD inspection was conducted at
Zone 2A on 21 July 2021. No prosecution or warning was given. The FEHD officer
have left the following comments for improvement: (1) Openings on water fill
barriers should be sealed / closed to prevent stagnant water accumulation; (2)
Damaged water fill barriers should be replaced; (3) Regular mosquito breeding
prevention measures such as larvicide oil spray, mosquito fogging and sprinkle
mosquito larvicide sand granules should be conducted; (4) Rubbish should be
cleared regularly from skips to prevent mosquito breeding (5) Mosquito breeding
grounds such as water ponding should be eliminated. Follow-up action for mosquito
prevention has been taken by contractors.
FEHD inspection was conducted at
Zone 2A on 26 July 2021. The FEHD inspector visited B1 and G/F, and mainly focus
on hygiene issue (such as, rubbish handling). No adverse comment from FEHD inspector
during the inspection.
EPD inspection was conducted at
Zone 2A on 30 July 2021. No adverse comments or prosecution was given. EPD
inspector verbally reminded that back-up sand bags to be provided at concrete
bump near dangerous goods store and ensure no untreated water discharged into
the sea.
The key observations from the
site inspections and associated recommendations are summarized in Table 4.1.
Table 4.1: Summary
of Site Inspections and Recommendations for Zone 2A
|
Inspection Date
|
Parameter
|
Observation / Recommendation
|
Contactor’s Responses /
Action(s) Undertaken
|
Close-out (Date)
|
|
02-Jul-21
|
Water Quality
|
The contractor was reminded to clean the
u-channel regularly to maintain proper function.
|
The contractor has provided cleaning for the
U-channel regularly.
|
03-Jul-21
|
|
02-Jul-21
|
Noise
|
The contractor was suggested to provide more
movable noise barrier to screen noise effectively
|
The contractor has provided more movable noise
barrier to minimise noise impact to the nearby resident.
|
03-Jul-21
|
|
08-Jul-21
|
Water Quality
|
The contractor was reminded to clean the
water treatment plant regularly to maintain water quality in good condition.
|
The contractor has provided cleaning for the
water treatment plant and the water quality has been improved.
|
09-Jul-21
|
|
08-Jul-21
|
Noise
|
The contractor was suggested to provide more
noise barrier to minimise noise impact to the resident during piling works.
|
The contractor has provided more noise barrier to minimise noise impact to the resident
during piling works.
|
10-Jul-21
|
|
15-Jul-21
|
Water Quality
|
The contractor was reminded to clean the
water treatment plant regularly to maintain water quality in good condition.
|
The contractor has provided cleaning for the
water treatment plant and the water quality has been improved.
|
16-Jul-21
|
|
22-Jul-21
|
Water Quality
|
The contractor was reminded to clean the
u-channel regularly to maintain proper function.
|
The contractor has provided cleaning for the
U-channel regularly.
|
24-Jul-21
|
|
22-Jul-21
|
Noise
|
The contractor was reminded to minimise gap
between noise screens as much as possible to screen noise effectively.
|
The contractor has minimized the gap
between noise screen as much as possible to screen noise effectively.
|
23-Jul-21
|
|
29-Jul-21
|
Water Quality
|
The contractor was reminded to clean the
water treatment plant regularly to maintain water quality in good condition.
|
The contractor has provided cleaning for the
water treatment plant and the water quality has been improved.
|
31-Jul-21
|
|
29-Jul-21
|
Air Quality
|
The contractor was reminded that the idle
debris shall be covered.
|
The contractor has covered the debris after
construction works.
|
29-Jul-21
|
4.2
Advice on the Solid and Liquid Waste Management Status
The Contractors have been
registered as a chemical waste producer for the Project. Construction and
demolition (C&D) material sorting will be carried out on site. A sufficient
number of receptacles were available for general refuse collection.
As advised by the Contractor, 71.14 tonnes, 602.69
tonnes and 6104.26 tonnes of inert C&D material were disposed of as public
fill to Chai Wan
Public Fill Barging Point, Tseung Kwan O Area 137 Public Fill, and
Tuen Mun Area 38 Public Fill respectively, while 14.00
tonnes and 133.95 tonnes of general refuse were disposed of at NENT and SENT
landfill respectively. 4.11 tonnes of metals, 0.0 tonne of paper/cardboard
packaging, 0.0 tonne of plastics and 0.0 tonne of timber was collected by
recycling contractors in the reporting month. 0.0 tonne of inert C&D
material was reused on site. 1289.08 tonnes of inert C&D material were
reused in other projects and 0.0 tonne of inert C&D material was imported
for reuse at site in the reporting month. 0.0 tonne of inert C&D material
was disposed to sorting facility and 0.20 tonne of chemical waste was collected
by licensed contractors in the reporting period.
The cumulative waste generation
records for Zone 2A are shown in Appendix I.
4.3
Status of Environmental
Licenses and Permits
The environmental permits,
licenses, and/or notifications on environmental protection for this Project
which were valid during the period are summarised in Table 4.2.
Table 4.2: Status
of Environmental Submissions, Licenses and Permits for Zone 2A
|
Permit
/ License No.
/
Notification /
Reference
No.
|
Valid
Period
|
Status
|
Remarks
|
|
From
|
To
|
|
Chemical
Waste Producer Registration
|
|
WPN5113-256-B2597-01
|
10-Sep-20
|
--
|
Valid
|
--
|
|
Billing
Account Construction Waste Disposal
|
|
7037500
|
09-Jun-20
|
--
|
Account Active
|
--
|
|
Construction
Noise Permit
|
|
GW-RE-0159-21
|
11-Mar-21
|
10-Jul-21
|
Valid in the reporting period
|
Piling Works
|
|
GW-RE-0627-21
|
11-Jul-21
|
10-Nov-21
|
Valid
|
Piling Works
|
|
Wastewater Discharge License
|
|
WT00037344-2021
|
01-Feb-21
|
28-Feb-26
|
Valid
|
--
|
|
Notification under Air Pollution
Control (Construction Dust) Regulation
|
|
456376
|
21-May-20
|
--
|
Notified
|
--
|
|
Permit to Dump Material at sea under
Dumping at Sea Ordinance
|
|
461895
|
--
|
--
|
Under EPD Approval
|
--
|
4.4
Recommended Mitigation
Measures
The EM&A programme followed
the recommended mitigation measures in the EM&A Manual. The EM&A
requirements as well as the summary of implementation status of the
environmental mitigation measures are provided in Appendix J. In particular, the following
mitigation measures were brought to attention during the site inspections:
Air Quality
– Idle
stockpile should be fully covered when not in use or removed from the site.
Noise
Control
– Provide more noise barrier to minimise construction noise impact to the nearby noise
sensitive receiver.
– Gap between noise barrier should minimize
as much as possible to screen noise effectively.
Temporary
Water Drainage System & Water Quality
– The temporary drainage system should be well managed and updated
with the site condition.
– U-channel should be cleaned regularly.
– The
water treatment facilities should be cleaned regularly to maintain proper
function.
5
Compliance with Environmental Permit
The status
of the required submission under the EP during the reporting period is
summarized in Table 5.1.
Table 5.1: Status of Submissions under the Environmental Permit
|
EP Condition
|
Submission
|
Submission
Date
|
|
Condition 3.4
|
Monthly EM&A Report for June 2021
|
15 July 2021
|
There was no breach of
Action or Limit levels for Air Quality (1-hour TSP and 24-hour TSP) and Construction
Noise in this reporting month.
6.2
Record on Environmental
Complaints Received
One
environmental complaint was recorded in the reporting month.
On 7 July
2021, EPD has received a complaint from a staff of Standard Chartered Elements
Priority Banking Centre regarding construction noise from WKCD construction
site (Artist Square Bridge (ASB) construction site). On 5 July 2021, WKCD staff
has informed the complainant that the construction works of ASB project were
scheduled to be carried out until noon every day. However, noise nuisance
caused by ASB works usually lasts till 14:00 to 15:00 for consecutive 3 days.
As the work place of the complainant is in close proximity of ASB project,
daily noise exposure has become excessive, affecting daily duty performance and
well-being of the complainant. After carrying out the investigation with the
contractors, the description provided by the complainant revealed that the
noise source was not from WKCD Zone 2A site. Also, noise mitigation measures
for construction works have been implemented and maintained on site. In
addition, noise measurement and monitoring were carried out with no exceedance.
Thereby, the complaint might not be attributable to the Zone 2A site. However,
the Contractor is recommended to maintain good practice on site, and strengthen
the implementation of noise mitigation measures to reduce impacts to the nearby
neighbours.
The cumulative statistics
on complaints were provided in Appendix K.
No notifications of summons
or successful prosecutions were received this month. The cumulative statistics
on notifications of summons and successful prosecutions were provided in Appendix K.
Zone 2A-1
● Grouting Works (Trial 1)
– Install
Pump Wells
– Pumping
Test
● ELS
(Stage 1) – Grouting / Pipe Pile Works
– King
Post & Erection of Steel Column for Working Platform
● Socketed H-Pile Works
– Remaining Socket H-Pile Works
● Bored Pile Works
– Bored Pile Construction
Zone 2A-2
● Bored Pile Works
–
Additional Bored Pile Construction
● ELS (Stage 1) – Grouting / Pipe Pile Works
– King
Post
– Stage
1a & 1b Grouting
– Pipe
Pile Construction
Key issues to be considered in
the coming month include:
● Generation of dust from
construction works;
● Noise impact from piling works;
● Generation of site surface
runoffs and wastewater from activities on-site;
● The temporary drainage system should
be well managed and updated with the site condition, particularly on rainy
days;
● Management of stockpiles and
slopes, particularly on rainy days;
● Sorting, recycling, storage and
disposal of general refuse and construction waste; and
● Management of chemicals and
avoidance of oil spillage on-site.
The environmental site inspection and environmental
monitoring will be continued in the coming month. Impact monitoring for air
quality and noise in accordance with the approved EM&A Manual has commenced
since 3 October 2020
for Zone 2A. The tentative monitoring schedule for the
coming month is shown in the Appendix E.
The EM&A programme as recommended in the EM&A Manual has
been undertaken with the commencement of the construction activities at Zone 2A
on 3 October 2020.
Monitoring of air quality and noise with respect to the Projects is
underway. In particular, the 1-hour TSP, 24-hour TSP, noise level (as Leq, 30 minutes) under monitoring have been
checked against established Action and Limit levels. There was no breach of
Action or Limit levels for Air Quality (1-hour TSP and 24-hour TSP) and Construction
Noise monitoring in this reporting month.
One environmental complaint was
recorded in the reporting month. No notifications of summons or successful prosecutions were received
during the reporting month.
Weekly
construction phase site inspections and bi-weekly landscape and visual impact
inspections were conducted during the reporting month as required. It was
observed that the Contractors had implemented all possible and feasible
mitigation measures to mitigate the potential environmental impacts during
construction phase works.
Potential environmental impacts
due to the construction activities, including air quality, noise, water quality, waste, landscape and visual, will
be monitored or reviewed. The recommended environmental mitigation measures
shall be implemented on site and regular inspections as required will be
carried out to ensure that the environmental conditions are acceptable.
