executive summary
ES01
Civil Engineering and Development Department (hereafter referred as
“CEDD”) is the Project Proponent and the Permit Holder of the Project Cross Bay
Link, Tseung Kwan O (hereinafter referred as “the
Project”) which is a Designated Project to be implemented under Environmental
Permit number EP-459/2013 (hereinafter referred as “the EP-459/2013” or “the
EP”).
ES02
AUES was awarded the CEDD Contract Agreement No. EDO/04/2018 -
Environmental Team for Cross Bay Link, Tseung Kwan O
(hereinafter called “the Service Contract”). The Services under the Service
Contract is to provide environmental monitoring and audit (EM&A) services
for the Works Contracts pursuant to the requirement of Environmental Team (ET)
under the Approved EM&A Manual to ensure that the environmental performance
of the Works Contracts comply with the requirement specified in the EM&A
Manual and EIA Report of Agreement No. CE 43/2008 (HY) Cross Bay Link, Tseung Kwan O - Investigation and other relevant statutory
requirements.
ES03
This
is the 6th
Quarterly EM&A report presenting the monitoring results and inspection
findings for the reporting period from 1st
March 2020 to 31st May
2020 (hereinafter ‘the Reporting Period’).
Environmental Monitoring and Audit Activities
ES04
Environmental
monitoring activities under the EM&A program in this Reporting Period are
summarized in the following table.
Table ES-4 Summary Environmental
Monitoring Activities Undertaken in the Reporting Period
|
Issues
|
Environmental Monitoring Parameters / Inspection
|
Sessions
|
|
Air Quality
|
1-Hour TSP
|
51
|
|
24-Hr TSP
|
16
|
|
Construction Noise
|
Leq (30min) Daytime
|
26
|
|
Leq (5min) Evening(Note 1)
|
14
|
|
Water Quality
|
Marine Water
Sampling(Note 2)
|
25
|
|
Inspection / Audit
|
Contract 1
|
ET Regular
Environmental Site Inspection
|
13
|
|
Joint site
audit with Project Consultant and IEC
|
3
|
|
Contract 2
|
ET Regular
Environmental Site Inspection
|
13
|
|
Joint site audit
with Project Consultant and IEC
|
3
|
Note
1 Total sessions are
counted by every 3 consecutive Leq5min
Note
2 Total sessions
are counted by monitoring days
Breach of Action and Limit (A/L)
Levels
ES05
No air
quality monitoring exceedance was recorded in this Reporting Period. One (1) daytime, one (1) evening and one (1)
nighttime construction noise action level exceedance were recorded in the
reporting period. In addition, ten (10) sessions of evening additional
construction noise monitoring exceedances were recorded in this Reporting
Period. For water quality monitoring, no action level and limit level
exceedance was recorded in the reporting period. NOEs were issued to notify EPD,
IEC, the Contractor and the Project Consultant. The statistics of environmental
exceedance, NOE issued and investigation of exceedance are summarized in the
following table.
Table ES-5 Summary Environmental
Monitoring Parameter Exceedance in the Reporting Period
|
Environmental Issues
|
Monitoring Parameters
|
Action Level
|
Limit Level
|
Event & Action
|
|
Investigation Results
|
Corrective Actions
|
|
Air Quality
|
1-Hour TSP
|
0
|
0
|
--
|
--
|
|
24-Hr TSP
|
0
|
0
|
--
|
--
|
|
Construction Noise
|
Leq30min Daytime
|
1
|
0
|
Not project related
|
NA
|
|
Leq5min Evening
|
1
|
10
|
Not project related
|
NA
|
|
Leq5min
Nighttime
|
1
|
0
|
Not project related
|
NA
|
|
Water Quality
(Marine Water)
|
DO
|
0
|
0
|
--
|
--
|
|
Turbidity
|
0
|
0
|
--
|
--
|
|
SS
|
0
|
0
|
--
|
--
|
Note: NOE
– Notification of Exceedance
ES06
For
the evening construction noise monitoring limit level exceedances recorded in
the reporting period, investigations were carried out and it was considered
that the exceedances recorded are unlikely caused by the Project. Nevertheless, the Contractor was
reminded to strictly follow the requirement
stipulated in the applied CNP during evening works.
Environmental
Complaint
ES07
Four (4) environmental complaint was recorded in this Reporting Period for the Project. The statistics of environmental
complaint are summarized in the following table.
Table ES-6 Summary Environmental
Complaint Records in the Reporting Period
|
Reporting Period
|
Contract
|
Environmental Complaint Statistics
|
Related with the Works Contract(s)
|
|
Frequency
|
Cumulative
|
Complaint Nature
|
|
1 March
– 31 May 2020
|
1
|
3
|
5
|
Construction Dust, Noise and Wastewater
|
NA
|
|
2
|
1
|
3
|
Construction Dust
|
NA
|
Notification of Summons and Successful Prosecutions
ES08
No
environmental summons or prosecutions was received in this Reporting Period for
the Project. The statistics of
environmental summons or prosecutions are summarized in the following tables.
Table ES-7 Summary Environmental
Summons Records in the Reporting Period
|
Reporting Period
|
Contract
|
Environmental Summons Statistics
|
Related with the Works Contract(s)
|
|
Frequency
|
Cumulative
|
Complaint Nature
|
|
1 March – 31 May 2020
|
1
|
0
|
0
|
NA
|
NA
|
|
2
|
0
|
0
|
NA
|
NA
|
Table ES-8 Summary Environmental
Prosecutions Records in the Reporting Period
|
Reporting
Period
|
Contract
|
Environmental Prosecution Statistics
|
Related with the Works Contract(s)
|
|
Frequency
|
Cumulative
|
Complaint Nature
|
|
1
March – 31 May 2020
|
1
|
0
|
0
|
NA
|
NA
|
|
2
|
0
|
0
|
NA
|
NA
|
Site Inspection by
External Parties
ES09
No
site inspection was undertaken by AFCD within the Reporting Period. However,
EPD inspection were undertaken on 11, 13 and 28 May 2020.
Table of Contents
1. Introduction 3
1.1 Project
Background 3
1.2 Report
Structure 3
2. Project
Organization and Construction progress and Submission 4
2.1 Project
Organization 4
2.2 Construction
Progress 4
2.3 Summary of Environmental Submissions 4
3. Summary
of Environmental Monitoring Programmes and Requirements 5
3.1 General 5
3.2 Monitoring
Parameters 5
3.3 Monitoring
Locations 5
3.4 Monitoring
Frequency and Period 6
3.5 Determination
of Action/Limit (A/L) Levels 7
4. Impact
Monitoring Result 9
4.1 Results
of Air Quality Monitoring in the Reporting Month 9
4.2 Results
of Construction Noise Monitoring 9
4.3 Results
of Water quality Monitoring 10
5. Waste
Management 12
5.1 General
Waste Management 12
5.2 Records
of Waste Quantities 12
6. Site
Inspection 13
6.1 Requirements 13
6.2 Findings
/ Deficiencies During the Reporting Month 13
7. Landfill
Gas Monitoring 14
7.1 General
Requirement 14
7.2 Limit
Levels and Event and Action Plan 14
7.3 Landfill
Gas Monitoring 14
8. Environmental
Complaint and Non-Compliance 16
8.1 Environmental
Complaint, Summons and Prosecution 16
9. Implementation
Status of Mitigation Measures 17
9.1 General
Requirements 17
10. Conclusions
and Recommendations 18
10.1 Conclusions 18
10.2 Recommendations 18
List
of TABLES
Table 3-1 Summary
of EM&A Requirements
Table 3-2 Designated
Air Quality Monitoring Location recommended in EM&A Manual
Table 3-3 Designated
Construction Noise Monitoring Location recommended in EM&A Manual
Table 3-4 Interim
alternative location for air quality and noise monitoring
Table 3-5 Location
of Water Quality Monitoring Station
Table 3-6 Action
and Limit Levels for Air Quality
Table 3-7 Action
and Limit Levels for Construction Noise
Table 3-8 Action
and Limit Levels for Water Quality
Table 4-1 Summary
of Air Quality Impact Monitoring Results
Table 4-2 Summary
of Daytime Construction Noise Impact Monitoring Results
Table 4-3 Summary
of Evening Construction Noise Impact Monitoring Results
Table 4-4 Results
Summary of Depth Average (Surface & Middle Layer) of DO (mg/L)
Table 4-5 Results
Summary of Bottom Depth of DO (mg/L)
Table 4-6 Results
Summary of Depth Average of Turbidity (NTU)
Table 4-7 Results
Summary of Depth Average of Suspended Solids (mg/L)
Table 4-8 Summary
of Water Quality Exceedance
Table 5-1 Summary
of Quantities of Inert C&D Materials
Table 5-2 Summary
of Quantities of C&D Wastes
Table 6-1 Summary
of Site Observations of Contract 1
Table 6-2 Summary
of Site Observations of Contract 2
Table 7-1 Actions
in the Event of Landfill Gas Being Detected in Excavations
Table 7-2 Summary
of Landfill Gas Measurement Results
Table 8-1 Statistical
Summary of Environmental Complaints
Table 8-2 Statistical
Summary of Environmental Summons
Table 8-3 Statistical
Summary of Environmental Prosecution
Table 9-1 Environmental
Mitigation Measures in the Reporting Period
List
of Appendices
Appendix
A Project Layout
Plan
Appendix
B Project
Organization Chart & Contact Details of Key Personnel
Appendix
C 3-Month Rolling
Construction Program
Appendix D Monitoring Location (Air
Quality, Noise and Water Quality)
Appendix E Graphical plots of Monitoring
Results
Appendix F Meteorological Information
Appendix
G Waste Flow Table
Appendix
H Complaint Summary
Appendix I Implementation Schedule
for Environmental Mitigation Measures (ISEMM)
1.1.1
Civil Engineering and Development Department (hereafter referred
as “CEDD”) is the Project Proponent and the Permit Holder of the Project Cross
Bay Link, Tseung Kwan O (hereinafter referred as “the
Project”) which is a Designated Project to be implemented under Environmental
Permit number EP-459/2013 (hereinafter referred as “the EP-459/2013” or “the
EP”).
1.1.2
AUES was awarded the CEDD Contract Agreement No. EDO/04/2018 -
Environmental Team for Cross Bay Link, Tseung Kwan O
(hereinafter called “the Service Contract”). The Services under the Service
Contract is to provide environmental monitoring and audit (EM&A) services
for the Works Contracts pursuant to the requirement of Environmental Team (ET)
under the Approved EM&A Manual to ensure that the environmental performance
of the Works Contracts comply with the requirement specified in the EM&A
Manual and EIA Report of Agreement No. CE 43/2008 (HY) Cross Bay Link, Tseung Kwan O - Investigation and other relevant statutory
requirements.
1.1.3
As part of the EM&A programme,
baseline monitoring shall be undertaken before the Project construction work
commencement to determine the ambient environmental condition. The baseline air quality, background noise
and water quality monitoring has been carried out between 21st September 2018
and 13th November 2018 at the
designated and interim locations. The baseline monitoring report under the EP-459/2013 has been compiled
by the ET and verified by Independent Environmental Checker (hereinafter the
“IEC’) prior submitted to EPD on 19th November 2018 for
endorsement.
1.1.4
This
is the 6th
Quarterly EM&A report presenting the monitoring results and inspection
findings for the reporting period from 1st
March 2020 to 31st May 2020
(hereinafter ‘the Reporting Period’).
1.2.1
The
Environmental Monitoring and Audit (EM&A) Monthly
Report is structured into the following sections:-
|
Section 1
|
Introduction
|
|
Section 2
|
Project Organization and
Construction Progress
|
|
Section 3
|
Summary
of Impact Monitoring Requirements
|
|
Section 4
|
Impact
Monitoring Results
|
|
Section 5
|
Waste
Management
|
|
Section 6
|
Site
Inspections
|
|
Section 7
|
Landfill Gas Monitoring
|
|
Section 8
|
Environmental
Complaints and Non-Compliance
|
|
Section 9
|
Implementation
Status of Mitigation Measures
|
|
Section 10
|
Conclusions
and Recommendations
|
2.1.1
The
project organization is shown in Appendix B. The responsibilities of
respective parties can be referred to Monthly Report.
2.2.1
3-month rolling construction program of each Works Contract is
enclosed in Appendix C; and the major
construction activities undertaken in the Reporting Period is presented in
below sub-sections.
Contract
1 (Contract No. NE/2017/07)
2.2.2
The major construction activities of Contract 1 undertaken in this
Reporting Period are:-
Ÿ 1st and 2nd Stage of Pile caps concreting
work at Portion II
Ÿ Fabrication
of bottom deck panels, top deck panels and diaphragm panels at Portion II
Ÿ Fabrication
of arch panel at Portion II
Ÿ Precast
shell installation at Portion II
Ÿ Stainless
steel gully fabrication at Portion II
Ÿ ABWF
work at Portion V
Ÿ E&M
installation at Portion V
Contract 2 (Contract
No. NE/2017/08)
2.2.3
The major construction activities of Contract 2 undertaken in this
Reporting Period are:-
Ÿ Pre-bored Socket H-Pile (Portion VI)
Ÿ Pre-drilling Works (Portion VI)
Ÿ Excavation Work (Portion VI)
Ÿ Drainage Installation Work (Portion VI)
Ÿ Sheet pile Work (Portion VI)
Ÿ Footing construction (Portion VI)
Ÿ Excavation & RC works (Superstructure) (Portion III)
Ÿ Desilting work at 1800 drain pipe (Portion III)
Ÿ Trimming bored pile head (Portion VI)
2.3
Summary of Environmental Submissions
2.3.1
All the documents required under Environmental Permit No.
EP-459/2013 were submitted within the required timeframe. The details can be
referred to the Monthly Report.
2.3.2
Upon completed baseline monitoring, a Baseline Monitoring Report was verified by IEC on 19
November 2018 and submitted to EPD on that day for endorsement.
2.3.3
The notification
of Project dedicated web site to EPD was made on 9 January 2019 (http://www.envcbltko.hk/).
3.1.1
The Environmental Monitoring and Audit Programmes
and requirements are set out in the Approved EM&A manual. Environmental issues such as air quality,
construction noise and water quality were identified as the key issues during
the construction phase of the Project.
A summary of EM&A programmes and requirements
are
presented in the sub-sections below.
3.2.1
Monitoring parameters of air quality, noise and water quality are
summarized in Table 3-1.
Table 3-1 Summary
of EM&A Requirements
|
Environmental
Issue
|
Parameters
|
|
Air Quality
|
Ÿ 1-hour TSP by Real-Time
Portable Dust Meter; and
Ÿ 24-hour TSP by High Volume
Air Sampler
|
|
Noise
|
Ÿ Leq (30min) in six consecutive Leq(5 min) between 07:00-19:00 on normal
weekdays
Ÿ Supplementary
information for data auditing, statistical results such as L10 and
L90 shall also be obtained for reference.
|
|
Water Quality
|
Ÿ In-situ measurement
– Dissolved Oxygen (DO) concentration (mg/L) & saturation (%), pH,
Salinity (mg/L), Temperature (ºC) and Turbidity (NTU); and
Ÿ Laboratory analysis
– SS (mg/L)
|
Air Quality and Construction Noise
3.3.1
According to
the Approved EM&A Manual Section 5.4
and Section 6.3, three (3) representative air sensitive receivers (ASR)
and four (4) representative noise sensitive receivers
were designated as monitoring stations.
The designated air quality and noise monitoring locations are listed in Table
3-2 and Table 3-3, and illustrated in Appendix D.
Table 3-2 Designated Air Quality
Monitoring Location recommended in
EM&A Manual
|
ID
|
Location
in the EM&A Manual
|
Currently Situation
|
|
AM1
|
Tung Wah Group of Hospitals
Aided Primary School & Secondary School
|
Not yet
construct
|
|
AM2
|
Lohas Park Stage 2
(Planned Development in Area 86)
|
Under
Construction
|
|
AM3
|
Lohas Park Stage 3
(Planned Development in Area 86)
|
Under
Construction
|
Table 3-3 Designated
Construction Noise Monitoring Location recommended by
EM&A Manual
|
ID
|
Location
|
Currently Situation
|
|
CNMS-1
|
Lohas Park Stage
1(Planned Development in Area 86, Package 5) (Southeast facade)
|
Available for
resident occupation in November 2019
|
|
CNMS-2
|
Lohas Park Stage 1
(Planned Development in Area 86, Package 6) (Southeast facade)
|
Under
Construction
|
|
CNMS-3
|
Lohas Park Stage 3
(Planned Development in Area 86,Package 11) (West facade)
|
Under
Construction
|
|
CNMS-4
|
Tung Wah Group of Hospitals Aided Primary School &
Secondary School (Southwest facade)
|
Not yet
construct
|
3.3.2
As observed and confirmed by ET and IEC during the joint site visit on 29th August 2018, the
designated air quality and noise
monitoring locations are under construction or yet to construct. It is considered that these
designated locations are not appropriate to perform air quality and noise
monitoring. In this regard, alternative locations were proposed as interim arrangement to
carry out air quality and noise monitoring before occupation of the designated
monitoring location. A letter enclosed with the alternative location proposal
and IEC verification (Our Ref: TCS00975/18/300/L0038) was sent to EPD on 19th
October 2018 and the proposal was agreed by EPD. Therefore, air
quality and construction noise impact monitoring would be performed at the
agreed alternative locations until the designated sensitive receivers occupied
and granted the premises.
3.3.3
The designated and interim alternative
monitoring location for impact air quality and
noise monitoring in the Reporting Period are summarized in Table 3-4 and illustrated in Appendix
D.
Table 3-4 Interim alternative location
for air quality and noise monitoring
|
Location ID
|
Monitoring Parameter
|
Location
|
|
AM4
|
1-Hour TSP Air
Quality
|
Podium of Lohas Park Phase 2A (Le Prestige)
|
|
AM5
|
24-Hour TSP Air Quality
|
Boundary of Site Office near Junction of Wan Po Road and Wan O Road
|
|
CNMS-1
|
Noise (Leq, L10 & L90)
|
Podium of Lohas Park Package 4
|
|
CNMS-5
|
Noise (Leq, L10 & L90)
|
Podium of Lohas Park Phase 2A (Le Prestige)
|
Remark: Since
24-Hour TSP Air Quality monitoring is not granted at AM4 Lohas
Park Phase 2A, the 24-Hour TSP monitoring was therefore proposed at AM5 which
is located at the boundary of the project site office.
Water Quality
3.3.4
According to
Table 7.1 of the
approved EM&A Manual Section 7.4, two Control
Stations (C3 & C4), six (6) sensitive
receivers (CC1, CC2, CC3, CC4, CC13
& SWI1) and one (1) Gradient station (I1) are
recommended to perform water quality monitoring. Details and
coordinate of these water quality monitoring stations are described in Table
3-5 and the locations is shown in Appendix D.
Table 3-5 Location of Water Quality
Monitoring Station
|
Station
|
Coordinates
|
Description
|
|
Easting
|
Northing
|
|
CC1
|
843201
|
816416
|
Sensitive
Receiver –
Coral Sites at Chiu Keng Wan
|
|
CC2
|
844076
|
817091
|
Sensitive
Receiver –
Coral Sites at Junk Bay
|
|
CC3
|
844606
|
817941
|
Sensitive
Receiver –
Coral Sites at Junk Island
|
|
CC4
|
845444
|
815595
|
Sensitive
Receiver –
Coral Sites at Fat Tong Chau West
|
|
CC13
|
844200
|
817495
|
Sensitive Receiver – Coral Sites at Junk Bay
near Chiu Keng Wan
|
|
SWI1
|
845512
|
817442
|
Sensitive
Receiver – Tseung Kwan O Salt Water Intake
|
|
C3
|
843821
|
816211
|
Control Station (Ebb Tide) – within Junk Bay
|
|
C4
|
844621
|
815770
|
Control Station (Flood Tide) – within Junk Bay
|
|
I1
|
844602
|
817675
|
Gradient Station – in between Lam Tin Tunnel (LTT) and CBL
|
3.4.1
To according with the approved EM&A Manual, impact monitoring requirements are presented as
follows.
Air Quality Monitoring
3.4.2
Air quality impact monitoring frequency is
as follows:
Ÿ Once every 6 days of 24-hour TSP and 3 times of 1-hour TSP monitoring; during course of works throughout the construction period
Construction Noise Monitoring
3.4.3
Construction noise monitoring frequency is
as follows:
Ÿ One set of Leq(30min) measurements in a weekly basis
between 07:00 and 19:00 hours on normal weekdays during course of works as throughout the construction period
Ÿ If construction works are
extended to include works during the hours of 1900-0700, additional weekly
impact monitoring shall be carried out during evening and night-time works.
Applicable permits under the NCO shall be obtained by the Contractor.
Water Quality (Marine Water) Monitoring
3.4.4
Marine water impact monitoring frequency
is as follows:
Ÿ Three days a week, at mid ebb and mid flood
tides during
course of pile excavation works for the bridge pier foundations underway. Moreover, the intervals between 2 consecutive sets of monitoring day
shall not be less than 36 hours.
3.5.1
The baseline results form the basis for determining the
environmental acceptance criteria for the impact monitoring. A summary of the Action/Limit (A/L)
Levels for air quality, construction noise and water quality are shown in Tables
3-6, 3-7 and 3-8 respectively.
Table
3-6 Action & Limit Levels of Air
Quality (1-Hour & 24-Hr TSP)
|
Monitoring Station
|
Action Level (mg /m3)
|
Limit Level (mg/m3)
|
|
1-Hour TSP
|
24-Hr TSP
|
1-Hour TSP
|
24-Hr TSP
|
|
AM4
|
278
|
NA
|
500
|
NA
|
|
AM5
|
NA
|
190
|
NA
|
260
|
|
Note: 1-Hour
& 24-Hr TSP of Action Level = (Average
Baseline Results × 1.3 + Limit
level)/2
|
Table 3-7 Action
and Limit Levels for Construction Noise, dB(A)
|
Monitoring Location
|
Action Level
|
Limit Level
(Leq30min)
|
|
Time Period: 0700-1900 hours
on normal weekdays
|
|
CNMS-1
|
When
one or more documented complaints are received
|
75 dB(A)
|
|
CNMS-5
|
|
Remarks:
1.
Construction noise monitoring
will be resumed at the designated locations CNMS-2, CNMS-3 and CNMS4 once
they are available and permission are granted;
2.
The designated locations CNMS-2
and CNMS-3 are located at residential building which are still under construction, Limit
Level of 75dB(A) will be adopted until they are occupied;
3.
The designated location
CNMS-4 is located at
planned school and still not yet to construction. When the school occupied and operated, Limit Level of 70dB(A) should be
adopted and should be reduced to 65dB(A) during examination period; and
4.
If
construction works are required during restricted hours, the conditions
stipulated in the construction noise permit issued by the
Noise Control Authority shall be followed.
|
Table
3-8 Action
and Limit Levels for Water Quality
|
Monitoring Station
|
Depth Average of SS (mg/L)
|
|
Action Level
|
Limit Level
|
|
CC1
|
7.8
|
OR
120% of upstream control station at the same tide of the same day
(Control Station C3 at Ebb tide and Control Station C4 at Flood tide),
whichever is higher
|
9.3
|
OR
130% of upstream control station at the same tide of the same day
(Control Station C3 at Ebb tide and Control Station C4 at Flood tide)
, whichever is higher
|
|
CC2
|
9.0
|
9.2
|
|
CC3
|
8.2
|
9.0
|
|
CC4
|
13.8
|
15.4
|
|
CC13
|
8.9
|
10.3
|
|
SWI1
|
8 mg/L
|
10 mg/L
|
|
|
Monitoring Location
|
Dissolved
Oxygen (mg/L)
|
|
Depth
Average of Surface and Mid-depth
|
Bottom
|
|
Action
Level
|
Limit Level
|
Action
Level
|
Limit Level
|
|
CC1
|
5.8
|
5.7
|
5.3
|
5.2
|
|
CC2
|
5.8
|
5.7
|
5.3
|
5.1
|
|
CC3
|
5.5
|
5.4
|
4.9
|
4.7
|
|
CC4
|
5.7
|
5.7
|
5.5
|
5.4
|
|
CC13
|
5.6
|
5.5
|
5.3
|
5.2
|
|
SWI1
|
5.4
|
4.8
|
5.1
|
5.0
|
|
|
|
Monitoring Location
|
Depth Average of Turbidity (NTU)
|
|
Action Level
|
Limit Level
|
|
CC1
|
5.8
|
OR
120% of upstream control station at the same tide of the same day
(Control Station C3 at Ebb tide and Control Station C4 at Flood tide)
, whichever is higher
|
6.0
|
OR
130% of upstream control station at the same tide of the same day
(Control Station C3 at Ebb tide and Control Station C4 at Flood tide)
, whichever is higher
|
|
CC2
|
4.6
|
5.5
|
|
CC3
|
4.8
|
5.4
|
|
CC4
|
6.1
|
7.1
|
|
CC13
|
6.0
|
6.3
|
|
SWI1
|
6.1
|
7.1
|
|
|
|
|
|
|
|
3.5.2
Should
non-compliance of the environmental quality criteria occurs, remedial actions
will be triggered according to the Event and Action Plan as stated EM&A
Manual.
4.1.1
During the Reporting Period, 51 sessions of 1-hour TSP and 16 sessions of 24-hours TSP monitoring were carried out and the monitoring
results are summarized in Table 4-1. The relevant graphical plots are shown in Appendix E.
Table 4-1 Summary
of Air Quality Impact Monitoring Results
|
Monitoring Location
|
1-hour TSP (µg/m3)
|
24-hour TSP (µg/m3)
|
|
Min
|
Max
|
Average
|
Min
|
Max
|
Average
|
|
AMS-4
|
60
|
120
|
74
|
|
|
Record Date
|
21-Apr-20
|
12-May-19
|
51 events
|
|
AMS-5
|
|
60
|
180
|
115
|
|
Record Date
|
28-May-20
|
9-Apr-20
|
16 events
|
4.1.2
As
shown in Table 4-1, all the 1-hour TSP and 24-hour TSP monitoring
results were below the Action / Limit Levels. No Notification of Exceedance (NOE) was
issued in this Reporting Period.
4.1.3
No adverse impact due to weather condition on the monitoring
result was observed in reporting quarter. The summary of meteorological
information for the Reporting Period is shown in Appendix F.
4.2.1
13
sessions of daytime construction noise monitoring and 7 sessions of evening construction noise monitoring were performed
at the designated location CNMS-1 in the reporting period; and 13 sessions
of daytime construction noise monitoring and 7 sessions of evening construction noise monitoring were performed
at the interim alternative location CNMS-5 in the reporting period. The noise monitoring results at designated
location CNMS-1 and interim alternative monitoring location CNMS-5 are
summarized in Table 4-2 and Table 4-3. The relevant graphical plots are shown in Appendix E.
Table 4-2 Summary
of Daytime Construction Noise Impact Monitoring Results
|
Monitoring
Location
|
Leq, 30min (dB((A))
|
|
Min
|
Max
|
Average
|
|
CNMS-1
|
63.5
|
70.8
|
68.7
|
|
Record Date
|
1-Apr-20
|
27-Apr-20
|
13
sessions
|
|
CNMS-5
|
60.9
|
69.0
|
66.1
|
|
Record Date
|
21-Apr-20
|
29-May-20
|
13
sessions
|
4.2.2
All the measured daytime construction noise results were below 75dB(A)
of the limit level acceptance criteria.
4.2.3
Three
(3) environmental complaints regarding construction noise were received in the
Report Period, therefore three (3) action level exceedances were registered in
the reporting period.
Table 4-3 Summary
of Evening Construction Noise Impact Monitoring Results
|
Monitoring
Location
|
Leq, 5min (dB((A))
|
|
Min
|
Max
|
Average
|
|
CNMS-1
|
49.6
|
58.0
|
54.3
|
|
Record Date
|
8-Apr-20
|
28-May-20
|
7
sessions
|
|
CNMS-5
|
59.6
|
65.0
|
61.8
|
|
Record Date
|
17-Mar-20
|
31-Mar-20
|
7
sessions
|
4.2.4
A total
of ten (10) limit level evening noise monitoring exceedances were recorded in
the reporting period due to the measured results were higher than 55dB(a) of
the acceptance criteria. Investigations were undertaken by ET accordingly and
it was considered the exceedances recorded were unlikely due to the Project.
4.3.1
As confirmed, all the marine piling and piling excavation work
were completed in January 2020 and all pile cap installation work was completed
in mid-March 2020. Due to the marine construction works that requires marine
water quality monitoring as stated in the EM&A Manual were completed, the
impact water quality monitoring was ceased with effect from 1 May 2020.
4.3.2
In this Reporting Period, a total of 25 sampling
days were performed
for marine water monitoring at the nine
designated locations. Monitoring
results of 3 key parameters: dissolved oxygen (DO), turbidity and suspended
solids are summarized in Tables 4-4 to 4-7 and the graphical
plots are shown in Appendix E.
Table 4-4 Results
Summary of Depth Average (Surface & Middle Layer) of DO (mg/L)
|
Tidal
|
CC1
|
CC2
|
CC3
|
CC4
|
CC13
|
SWI1
|
C3
|
C4
|
I1
|
|
Mid-Ebb
|
Average
|
7.17
|
7.24
|
7.30
|
7.26
|
7.29
|
7.35
|
7.24
|
7.30
|
7.20
|
|
Min
|
6.51
|
6.51
|
6.56
|
6.50
|
6.66
|
6.42
|
6.51
|
6.60
|
6.13
|
|
Max
|
7.98
|
8.07
|
8.74
|
8.58
|
8.30
|
9.12
|
8.57
|
8.41
|
8.77
|
|
Mid-Flood
|
Average
|
7.18
|
7.21
|
7.23
|
7.26
|
7.27
|
7.33
|
7.23
|
7.25
|
7.23
|
|
Min
|
6.33
|
6.54
|
6.53
|
6.50
|
6.60
|
6.56
|
6.63
|
6.42
|
6.26
|
|
Max
|
7.95
|
8.01
|
8.39
|
8.62
|
8.37
|
8.97
|
8.39
|
8.45
|
8.70
|
Table 4-5 Results
Summary of Bottom Depth of DO (mg/L)
|
Tidal
|
CC1
|
CC2
|
CC3
|
CC4
|
CC13
|
SWI1
|
C3
|
C4
|
I1
|
|
Mid-Ebb
|
Average
|
7.07
|
7.10
|
7.06
|
7.14
|
7.10
|
6.96
|
NA
|
7.22
|
7.16
|
|
Min
|
6.41
|
6.37
|
6.42
|
6.39
|
6.47
|
6.37
|
NA
|
6.52
|
6.07
|
|
Max
|
7.07
|
7.10
|
7.06
|
7.14
|
7.10
|
6.96
|
NA
|
7.22
|
7.16
|
|
Mid-Flood
|
Average
|
7.08
|
7.09
|
7.05
|
7.12
|
7.10
|
7.00
|
NA
|
7.18
|
7.20
|
|
Min
|
6.38
|
6.49
|
6.40
|
6.40
|
6.49
|
6.38
|
NA
|
6.49
|
6.19
|
|
Max
|
7.80
|
7.90
|
7.76
|
8.04
|
7.96
|
7.75
|
NA
|
8.23
|
8.75
|
Remark:
No Dissolved Oxygen (Bottom) monitoring data available for CC4 due to the water
depth measured at CC4 during the monitoring days were less than 3 meters.
Table 4-6 Results
Summary of Depth
Average of Turbidity (NTU)
|
Tidal
|
CC1
|
CC2
|
CC3
|
CC4
|
CC13
|
SWI1
|
C3
|
C4
|
I1
|
|
Mid-Ebb
|
Average
|
1.60
|
1.34
|
1.53
|
1.35
|
1.53
|
1.67
|
1.45
|
