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 Construction Noise Impact Monitoring results
Table 4-3 Result
Summary of Depth Average (Surface & Middle Layer) of DO (mg/L)
Table 4-4 Result
Summary of Bottom Depth of DO (mg/L)
Table 4-5 Result
Summary of Depth Average of Turbidity (NTU)
Table 4-6 Result
Summary of Depth Average of Suspended Solid (mg/L)
Table 4-7 Summary
of Water Quality Exceedance
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 5th
Quarterly EM&A report presenting the monitoring results and inspection
findings for the reporting period from 1st December 2019 to 29th
February 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 Piling
works at Portion II
Ÿ Welding
of steel bracket for precast shell installation at Portion II
Ÿ Fabrication
of bottom deck panels, top deck panels and diaphragm panels at Portion II
Ÿ Fabrication
of arch panel
Ÿ Precast
shell fabrication at Portion II
Ÿ Stainless
steel gully fabrication at Portion II
Ÿ Modification
work for precast yard at Portion II
Contract 2 (Contract
No. NE/2017/08)
2.2.3
The major construction activities of Contract 2 undertaken in this
Reporting Period are:-
Ÿ Bored-Piling Works (Portion III, VI & VII)
Ÿ Pre-bored Socket H-Pile (Portion VI)
Ÿ Pre-drilling Works (Portion VI)
Ÿ Excavation Work (Portion VI)
Ÿ Drainage Installation Work (Portion III & VI)
Ÿ Sheet pile Work (Portion VI)
Ÿ Footing construction (Portion III & VI)
Ÿ Excavation & RC works (Superstructure) (Portion III)
Ÿ Installation of temporary road lightings & removal of
existing road lightings (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-1, 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
|
51
|
116
|
79
|
|
|
Record Date
|
14-Feb-20
|
7-Dec-19
|
51 events
|
|
AMS-5
|
|
39
|
173
|
111
|
|
Record Date
|
11-Feb-20
|
17-Feb-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
14
sessions of daytime construction noise monitoring and 6 sessions of evening construction noise monitoring were performed
at the interim alternative location CNMS-1 in the reporting period; and 14 sessions
of daytime construction noise monitoring and 6 sessions of evening construction noise monitoring were performed
at the interim alternative location CNMS-5 in the reporting period. The noise monitoring results at interim
alternative location CNMS-5 is 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
|
57.3
|
69.2
|
65.5
|
|
Record Date
|
3-Feb-20
|
26-Feb-20
|
14
sessions
|
|
CNMS-5
|
63.3
|
70.5
|
67.0
|
|
Record Date
|
3-Feb-20
|
10-Jan-20
|
14
sessions
|
4.2.2
All the measured daytime construction noise results were below 75dB(A)
of the acceptance criteria. However,
three (3) occasions of environmental complaints regarding construction noise
was received in the Report Period, which has one occasion complaint was related
Contract 1 and two occasions were related Contract 2. No non-compliance was therefore found
during 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
|
52.2
|
58.9
|
54.6
|
|
Record Date
|
3-Dec-19
|
11-Dec-19
|
6
sessions
|
|
CNMS-5
|
59.0
|
63.0
|
61.9
|
|
Record Date
|
18-Dec-19
|
23-Dec-19
|
6
sessions
|
4.2.3
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
In this Reporting Period, a total of 37 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
|
7.55
|
7.54
|
7.48
|
7.55
|
7.55
|
7.48
|
7.50
|
7.57
|
7.52
|
|
Min
|
5.07
|
5.18
|
5.37
|
5.29
|
5.21
|
5.37
|
6.53
|
4.77
|
5.31
|
|
Max
|
8.20
|
8.32
|
8.20
|
8.24
|
8.35
|
8.44
|
8.06
|
8.18
|
8.21
|
|
Mid-Flood
|
Average
|
7.59
|
7.56
|
7.49
|
7.54
|
7.57
|
7.55
|
7.52
|
7.56
|
7.54
|
|
Min
|
6.71
|
6.74
|
6.43
|
6.40
|
6.86
|
6.57
|
6.71
|
6.69
|
6.75
|
|
Max
|
8.20
|
8.33
|
8.22
|
8.22
|
8.33
|
8.26
|
8.14
|
8.16
|
8.21
|
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
|
7.47
|
7.43
|
7.24
|
NA
|
7.49
|
7.45
|
7.42
|
7.49
|
7.37
|
|
Min
|
6.54
|
6.62
|
6.03
|
NA
|
6.70
|
6.26
|
7.45
|
7.51
|
7.39
|
|
Max
|
8.15
|
8.21
|
7.90
|
NA
|
8.22
|
8.28
|
7.46
|
7.52
|
7.40
|
|
Mid-Flood
|
Average
|
7.48
|
7.43
|
7.28
|
NA
|
7.51
|
7.48
|
7.42
|
7.47
|
7.37
|
|
Min
|
6.62
|
6.44
|
6.24
|
NA
|
6.55
|
4.84
|
6.53
|
6.59
|
6.29
|
|
Max
|
8.16
|
8.23
|
8.02
|
NA
|
8.28
|
8.33
|
7.92
|
7.90
|
8.07
|
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
|
1.37
|
1.60
|
1.72
|
1.42
|
1.28
|
1.40
|
1.35
|
1.35
|
1.87
|
|
Min
|
0.56
|
0.77
|
0.93
|
0.63
|
0.57
|
0.56
|
0.59
|
0.37
|
1.02
|
|
Max
|
3.86
|
4.40
|
4.30
|
2.87
|
3.88
|
3.80
|
3.17
|
4.27
|
4.34
|
|
Mid-Flood
|
Average
|
1.31
|
1.42
|
1.73
|
1.39
|
1.35
|
1.41
|
1.41
|
1.38
|
1.55
|
|
Min
|
0.74
|
0.72
|
0.92
|
0.64
|
0.55
|
0.31
|
0.57
|
0.50
|
0.96
|
|
Max
|
3.83
|
2.35
|
4.30
|
4.32
|
5.25
|
3.89
|
3.50
|
3.80
|
2.79
|
Table 4-7 Results
Summary of Depth
Average of Suspended Solids (mg/L)
|
Tidal
|
CC1
|
CC2
|
CC3
|
CC4
|
CC13
|
SWI1
|
C3
|
C4
|
I1
|
|
Mid-Ebb
|
Average
|
3.60
|
3.56
|
3.70
|
3.58
|
3.45
|
4.33
|
3.72
|
3.34
|
3.78
|
|
Min
|
1.00
|
1.47
|
1.00
|
1.00
|
1.03
|
1.85
|
1.35
|
1.08
|
1.10
|
|
Max
|
10.43
|
8.45
|
7.50
|
6.75
|
7.22
|
10.08
|
8.23
|
7.13
|
9.10
|
|
Mid-Flood
|
Average
|
3.38
|
3.83
|
3.47
|
3.75
|
3.61
|
3.80
|
3.19
|
3.23
|
3.73
|
|
Min
|
1.10
|
1.00
|
1.12
|
1.00
|
1.12
|
1.65
|
1.35
|
1.02
|
1.15
|
|
Max
|
6.90
|
7.83
|
7.72
|
8.50
|
7.02
|
9.65
|
8.80
|
7.80
|
8.18
|
4.3.2
A
summary of exceedances for the four parameters: dissolved oxygen (DO),
turbidity and suspended solids (SS) are shown in Table 4-8.
|
Station
|
DO
(Ave of Top & mid-depth)
|
DO
(Bottom Depth)
|
Turbidity
(Depth Ave)
|
SS
(Depth Ave)
|
Total Exceedance for the Station
|
|
AL
|
LL
|
AL
|
LL
|
AL
|
LL
|
AL
|
LL
|
AL
|
LL
|
|
CC1
|
0
|
0
|
0
|
0
|
0
|
0
|
1
|
0
|
1
|
0
|
|
CC2
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
|
CC3
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
|
CC4
|
0
|
0
|
NA
|
NA
|
0
|
0
|
0
|
0
|
0
|
0
|
|
CC13
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
|
SWI1
|
0
|
0
|
0
|
0
|
0
|
0
|
1
|
1
|
1
|
1
|
|
No of Exceedance
|
0
|
0
|
0
|
0
|
0
|
0
|
2
|
1
|
2
|
1
|
4.4.1
In this
Reporting Period, a total of two (2) Action Level
and one (1) Limit Level exceedances of
Suspended Solids recorded.
4.4.2
Upon
confirmation of the monitoring result, Notification of Exceedances (NOEs) have been issued to relevant parties. Investigation for the cause of exceedance
was carried out by ET Since silt curtains as water quality
mitigation measure were properly implemented, no abnormal and turbid discharge
made from the construction site was observed during the course of marine water
sampling, it is considered that the exceedances of suspended solid recorded in
this period were unlikely caused by the Project. Nevertheless, the Contractor
was reminded to check the implementation of silt curtain regularly to ensure no
seepage of muddy water into the marine water body.
5.1.1
Waste management would be carried out by an on-site Environmental
Officer or an Environmental Consultant from time to time.
5.2.1
All
types of waste arising from the construction work are classified into the
following:
l Construction & Demolition (C&D)
Material;
l Chemical Waste; and
l General Refuse
5.2.2
According to the information provided by Contractor
of Contract 1 and Contract 2, waste disposal was made in the Reporting period are summarized in Tables 5-1 and 5-2.
Table 5-1 Summary of
Quantities of Inert C&D Materials
|
Type of Waste
|
Contract
No
|
Quantity
|
Disposal Location
|
|
Dec 2019
|
Jan 2020
|
Feb 2020
|
|
Total
Generated C&D Materials (Inert) (in '000m3)
|
1
|
1.104
|
1.020
|
0.102
|
TKO 137
|
|
2
|
0.700
|
1.374
|
1.750
|
|
Reused in this Project
(Inert)
(in '000m3)
|
1
|
0
|
0
|
0
|
-
|
|
2
|
0
|
0
|
0
|
-
|
|
Reused in other Projects
(Inert)
(in '000m3)
|
1
|
0
|
0
|
0
|
-
|
|
2
|
|
0
|
0
|
-
|
|
Disposal
as Public Fill (Inert)
(in '000m3)
|
1
|
1.104
|
1.020
|
0.102
|
TKO 137
|
|
2
|
0.700
|
1.374
|
1.750
|
|
Imported
Fill (‘000m3)
|
1
|
0
|
0
|
0
|
-
|
|
2
|
0
|
0
|
0
|
-
|
Table 5-2 Summary
of Quantities of C&D Wastes
|
Type of Waste
|
Contract
No
|
Quantity
|
Disposal Location
|
|
Dec 2019
|
Jan 2020
|
Feb 2020
|
|
|
1
|
0
|
0
|
0
|
-
|
|
2
|
0
|
0
|
|
|
Recycled Paper / Cardboard
Packing (‘000kg)
|
1
|
0.100
|
0.088
|
0.095
|
Licensed collector
|
|
2
|
0
|
0
|
0
|
|
Recycled Plastic (‘000kg)
|
1
|
0
|
0
|
0
|
-
|
|
2
|
0
|
0
|
0
|
|
Chemical Wastes (‘000kg)
|
1
|
0
|
0
|
0
|
Licensed
collector
|
|
2
|
0
|
0.036
|
0
|
|
General Refuses (‘000m3)
|
1
|
0.154
|
0.100
|
0.073
|
NENT
|
|
2
|
0.012
|
0.019
|
0.004
|
5.2.3
The Monthly Summary Waste Flow Table of the Contracts 1 and
Contract 2 are shown in Appendix G.
6.1.1
According
to the approved EM&A Manual, the environmental site inspection shall be
formulation by ET Leader. Weekly
environmental site inspections should carry out to confirm the environmental
performance.
Contract 1
6.2.1
In this Reporting Period, 12 events of
weekly joint site
inspection was carried out for Contract 1 to evaluate site environmental performance. The summaries of the findings during site
inspection are presented in Table 6-1 and the details of site
inspection can be found in relevant EM&A monthly
report.
Table 6-1 Summary
of Site Observations of the Contract 1
|
Reporting Period
|
Date of site inspection
|
Nos. of Findings/ Deficiencies
|
Follow-Up Status
|
|
December
2019
|
4, 11, 17 & 27 December 2019
|
4
|
Completed
|
|
January
2020
|
2, 6, 13 & 22 January 2020
|
5
|
Completed
|
|
February 2020
|
5, 12, 19 & 26 February 2020
|
4
|
Completed
|
6.2.2
In the
Reporting Period, no non-compliance was recorded for Contract 1; however, 13 observations
were recorded during the site inspections and the major findings were related
to water quality and chemical management mitigation measures. Details of the
findings of the inspection in the reporting period can be referred to the
Monthly EM&A Report. The
findings found in the weekly site inspection were in general rectified within
the specified deadlines. The
environmental performance of the Project was therefore considered satisfactory.
Contract 2
6.2.3
In this Reporting Period, 12 events of
weekly joint site
inspection was carried out for Contract 2 to evaluate site environmental performance. The summaries of the findings during site
inspection are presented in Table 6-2 and the details of site
inspection can be found in relevant EM&A monthly
report.
Table 6-2 Summary
of Site Observations of the Contract 2
|
Reporting Period
|
Date of site inspection
|
Nos. of Findings/ Deficiencies
|
Follow-Up Status
|
|
December
2019
|
4, 11, 17 & 27 December 2019
|
7
|
Completed
|
|
January
2020
|
2, 6, 13 & 22 January 2020
|
4
|
Completed
|
|
February 2020
|
5, 12, 19 & 26 February 2020
|
6
|
Completed
|
6.2.4
In the
Reporting Period, no non-compliance was recorded for Contract 2; however, 17 observations
were recorded during the site inspections and the major findings were related
to general housekeeping and chemical management mitigation measures. Details of the findings of the
inspection in the reporting period can be referred to the Monthly EM&A
Report. The findings found in
the weekly site inspection were in general rectified within the specified
deadlines. The environmental
performance of the Project was therefore considered satisfactory.
7.1.1
Pursuant to
Section 13 of the Project’s EM&A Manual, Landfill gas monitoring shall
perform during construction activities within the 250m Consultation Zone of Tseung Kwan O Stage II & III Landfill. For landfill gas monitoring
requirements, pre entry and routine measurement shall be undertaken
in accordance with the Factories and Industrial Undertaking (Confined
Spaces) Regulation.
7.1.2
According to Environmental Mitigation Implementation Schedule
(EMIS) S14.7.6, portable monitoring equipment can be used to conduct landfill
gas monitoring. Moreover, the
frequency and areas to be monitored should be set down prior to commencement of
the works either by the Safety Officer or by an appropriately qualified person.
7.2.1
In event of the trigger levels specified in Table 14.6 of the EIA
report being exceeded, a person, such as the Safety Officer, shall be
nominated, with deputies, to be responsible for dealing with any emergency
which may occur due to LFG. In an emergency situation the nominated
person, or his deputies, shall have the necessary authority and shall ensure
that the confined space is evacuated and the necessary works implemented for
reducing the concentrations of gas.
The
Limit levels and relevant Action Plans for landfill gas detected in utilities
and any on-site areas following construction is
listed in Table 7-1.
Table 7-1 Actions in the Event of Landfill Gas Being Detected in
Excavations
|
Parameter
|
Limit Level
|
Actions
|
|
Methane
|
>10% LEL (i.e.
>0.5% by volume)
|
Ÿ Post “No Smoking”
signs
Ÿ Prohibit hot works
Ÿ Ventilate to restore
methane to <10% LEL
|
|
>20% LEL (i.e.
>1% by volume)
|
Ÿ Stop excavation
works
Ÿ Evacuate
personnel/prohibit entry
Ÿ Increase ventilation
to restore methane to <10% LEL
|
|
Carbon dioxide
|
>0.5%
|
Ÿ Ventilate to restore
carbon dioxide to <0.5%
|
|
>1.5%
|
Ÿ Stop excavation
works
Ÿ Evacuate
personnel/prohibit entry
Ÿ Increase ventilation
to restore carbon dioxide to <0.5%
|
|
Oxygen
|
<19%
|
Ventilation to
restore oxygen >19%
|
|
<18%
|
Ÿ Stop excavation
works
Ÿ Evacuate personnel/prohibit
entry
Ÿ Increase ventilation
to restore oxygen to >19%
|
7.2.2
In the event of the trigger levels specified in Table 9-1 being
exceeded, the Safety Officer shall be responsible for dealing with any
emergency which may occur due to landfill gas.
7.3.1
In the
Reporting Period, landfill gas monitoring was conducted at the zone Wan O Road
which excavation work of Contract 2 was carried out.
7.3.2
There
were a total of 68 days monitoring were carried by the Safety Officer or an approved
and qualified persons. The results of landfill gas measurement
are summarized in Table 7-2.
|
Landfill
Gas Parameter
|
Action Level
|
Limit Level
|
Detectable at LMR
|
|
Min
|
Max
|
|
Methane
|
>10% LEL (>0.5% v/v)
|
>20% LEL (>1% v/v)
|
0.1%
|
0.1%
|
|
Oxygen
|
<19%
|
<18%
|
20.7%
|
21.0%
|
|
Carbon Dioxide
|
>0.5%
|
>1.5%
|
0.1%
|
0.2%
|
7.3.3
The measurement results shown that slightly
methane concentration was detected, oxygen concentration measured was over 19.0 % and Carbon Dioxide was between 0.1% and
0.2 %. No exceedance was triggered
and therefore no corrective action was required accordingly
8.1.1
In the Reporting Period, three (3) environmental complaints were received with respect to the construction noise
arising from Contract 1 and 2. Besides, no summons
and prosecution under the EM&A Programme was
lodged for the project. The
statistical summary table of environmental complaint is presented in Tables
8-1, 8-2 and 8-3. A summarized record of all complaints
received was provided in Appendix H.
Table 8-1 Statistical
Summary of Environmental Complaints
|
Reporting Period
|
Contract
|
Environmental Complaint Statistics
|
|
Frequency
|
Cumulative
|
Complaint Nature
|
|
1 – 31 December 2019
|
1
|
0
|
1
|
NA
|
|
1 – 31 January
2020
|
0
|
1
|
NA
|
|
1 – 29 February 2020
|
1
|
2
|
Noise
|
|
1 – 31 December 2019
|
2
|
0
|
0
|
NA
|
|
1 – 31 January
2020
|
2
|
2
|
Noise
|
|
1 – 29 February 2020
|
0
|
2
|
NA
|
Table 8-2 Statistical
Summary of Environmental Summons
|
Reporting Period
|
Contract
|
Environmental Complaint Statistics
|
|
Frequency
|
Cumulative
|
Complaint Nature
|
|
1 – 31 December 2019
|
1
|
0
|
0
|
NA
|
|
1 – 31 January
2020
|
0
|
0
|
NA
|
|
1 – 29 February 2020
|
0
|
0
|
NA
|
|
1 – 31 December 2019
|
2
|
0
|
0
|
NA
|
|
1 – 31 January
2020
|
0
|
0
|
NA
|
|
1 – 29 February 2020
|
0
|
0
|
NA
|
Table 8-3 Statistical
Summary of Environmental Prosecution
|
Reporting Period
|
Contract
|
Environmental Complaint Statistics
|
|
Frequency
|
Cumulative
|
Complaint Nature
|
|
1 – 31 December 2019
|
1
|
0
|
0
|
NA
|
|
1 – 31 January
2020
|
0
|
0
|
NA
|
|
1 – 29 February 2020
|
0
|
0
|
NA
|
|
1 – 31 December 2019
|
2
|
0
|
0
|
NA
|
|
1 – 31 January
2020
|
0
|
0
|
NA
|
|
1 – 29 February 2020
|
0
|
0
|
NA
|
9.1.1
The environmental mitigation measures that recommended in the
Implementation Schedule for Environmental Mitigation Measures (ISEMM) in the approved
EM&A Manual covered the issues of dust, noise,
water and waste and they are summarized presented in Appendix I.
9.1.2
The Contractors had
been implementing the required environmental mitigation measures according to the
Environmental Monitoring and Audit Manual subject to
the site condition. Environmental
mitigation measures generally implemented by the Contractors in this Reporting
Month are summarized in Table 9-1.
Table 9-1 Environmental
Mitigation Measures in the Reporting Period
|
Issues
|
Environmental Mitigation Measures
|
|
Construction Noise
|
· Regularly to
maintain all plants, so only the good condition plants were used on-site ;
· If possible,
all mobile plants onsite operation has located far from NSRs;
· When
machines and plants (such as trucks) were not in using, it was switched off;
· Wherever
possible, plant was prevented oriented
directly the nearby NSRs;
· Provided
quiet powered mechanical equipment to use onsite;
· Weekly noise
monitoring was conducted
to ensure construction noise meet the criteria.
|
|
Air Quality
|
· Stockpile of
dusty material was covered entirely with impervious sheeting or sprayed with
water so as to maintain the entire surface wet;
· The construction plants
regularly maintained to avoid the emissions of black smoke;
· The construction plants
switched off when it not in use;
· Water spraying on haul road and dry site area
was provided regularly;
· Where a vehicle leaving
the works site is carrying a load of dusty materials, the load has covered
entirely with clean impervious sheeting; and
· Before any vehicle leaving
the works site, wheel watering has been performed.
|
|
Water Quality
|
·
Debris and refuse generated on-site collected daily;
·
Oils and fuels were stored in designated areas;
·
The chemical waste storage as sealed area provided;
·
Site hoarding with sealed
foot were provided surrounding the boundary of working site to prevent
wastewater or site surface water runoff get into public areas; and
·
Portable chemical toilets were provided on-site. A licensed contractor was regularly disposal and maintenance of these
facilities.
·
Silt
curtain was installed and maintained in accordance with EP condition
|
|
Waste and Chemical Management
|
· Excavated material reused on site as far as possible to minimize
off-site disposal.
· Scrap metals or abandoned equipment should be recycled if possible;
· Waste arising kept to a minimum and be handled, transported and
disposed of in a suitable manner;
· Disposal of C&D wastes to any designated public filling facility
and/or landfill followed a trip ticket system; and
· Chemical waste
handled in accordance with the Code of Practice on the Packaging, Handling
and Storage of Chemical Wastes.
|
|
General
|
Ÿ The site is
generally kept tidy and clean.
Ÿ Mosquito control is performed to prevent
mosquito breeding on site.
|
10.1.1
This is the 5th Quarterly
EM&A report as presented the monitoring results and inspection findings for
the reporting period from 1st December 2019 to 29th February 2020.
10.1.2
In the Reporting Period, no daytime
construction noise monitoring results that triggered the Limit Level was
recorded. However, ten (10) sessions of evening additional construction noise
monitoring results triggered the Limit Level. Investigation was undertaken by
ET and it was considered that the exceedances
recorded are unlikely caused by the Project.
10.1.3
In this Reporting Period, no 1-Hour TSP or
24-Hr TSP air quality monitoring exceedance was recorded. No NOE or the associated
corrective actions were therefore issued.
10.1.4
For water quality monitoring, two (2) Action Level and one (1) Limit Level exceedance were
recorded for Suspended Solids in the reporting period. Investigation for the cause of exceedance was
carried out by ET subsequently and it is concluded that
the exceedances recorded in this reporting period were unlikely caused by the
Project.
10.1.5
In the Reporting Period, three (3) environmental complaints were
received with respect to the construction noise arising from the contract 1 and
2 of the Project. Investigation for the complaints were
undertaken by ET and mitigation measures were enhanced by the contractor.
Nevertheless, the Contractor of Contract 1 and 2 were reminded to implement the
noise mitigation measures as stated in EP and EM&A Manual as far as
practicable.
10.1.6
No
notification of summons or prosecution was received and recorded for the Project.
10.2.1
Due to the dry and windy season has begun in
Hong Kong, the Contractors were reminded that all the works to undertaking must
be fulfill environmental statutory requirement, especially construction dust
come from working sites of the Project.
10.2.2
In regards to the marine works, special
attention should be paid on excavation
works for the bridge pier foundations underway in which water quality mitigation measures such as erection of silt
curtain should be properly implemented and maintained.
