Table of Contents
1. Introduction 3
1.1 Project
Background 3
1.2 Report
Structure 3
2. Project Organization and Construction
progress and Submission 5
2.1 Project
Organization 5
2.2 Construction
Progress 6
2.3 Summary of Environmental Submissions 7
3. Summary of Environmental Monitoring
Programmes and Requirements 9
3.1 General 9
3.2 Monitoring
Parameters 9
3.3 Monitoring
Locations 9
3.4 Monitoring
Frequency and Period 10
3.5 Monitoring
Equipment 11
3.6 Monitoring
Procedures 12
3.7 Determination
of Action/Limit (A/L) Levels 15
3.8 Data
Management and Data QA/QC Control 17
4. Air Quality Monitoring 18
4.1 General 18
4.2 Results
of Air Quality Monitoring in the Reporting Month 18
5. Construction Noise Monitoring 19
5.1 General 19
5.2 Results
of Noise Monitoring 19
6. Water Quality Monitoring 20
6.1 General 20
7. Waste Management 21
7.1 General
Waste Management 21
7.2 Records
of Waste Quantities 21
8. Site Inspection 22
8.1 Requirements 22
8.2 Findings
/ Deficiencies During the Reporting Month 22
8.3 Implementation
Status of Surface Runoff Mitigation Measures 23
9. Landfill Gas Monitoring 24
9.1 General
Requirement 24
9.2 Limit
Levels and Event and Action Plan 24
9.3 Landfill
Gas Monitoring 24
10. Environmental Complaint and Non-Compliance 26
10.1 Environmental
Complaint, Summons and Prosecution 26
11. Implementation Status of Mitigation Measures 27
11.1 General
Requirements 27
11.2 Tentative
Construction Activities in the Coming Month 27
11.3 Impact
Forecast 28
12. Conclusions and Recommendations 29
12.1 Conclusions 29
12.2 Recommendations 29
List of TABLES
Table
2-1 Documents
Submission under Environmental Permit Requirement
Table
2-2 Status
of Environmental Licenses and Permits of the Project Works (Contract 1)
Table
2-3 Status
of Environmental Licenses and Permits of the Project Works (Contract 2)
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 Designated
and interim alternative location for air quality and noise monitoring in the
Reporting Period
Table
3-5 Location
of Water Quality Monitoring Station
Table
3-6 Air
Quality Monitoring Equipment
Table
3-7 Construction
Noise Monitoring Equipment
Table
3-8 Water
Monitoring Equipment
Table
3-9 Testing
Method and Reporting Limit of the Chemical Analysis
Table
3-10 Action
and Limit Levels for Air Quality
Table
3-11 Action
and Limit Levels for Construction Noise
Table
3-12 Action
and Limit Levels for Water Quality
Table
4-1 1-Hour
TSP Air Quality Impact Monitoring results for AM4 and 24-Hour TSP Air Quality
Impact Monitoring results for AM5
Table
4-2 1-Hour
TSP Air Quality Impact Monitoring results for AM2
Table
5-1 Daytime
Construction Noise Impact Monitoring results at CNMS-1
Table
5-2 Daytime
Construction Noise Impact Monitoring results at CNMS-2
Table
5-3 Daytime
Construction Noise Impact Monitoring results at CNMS-5
Table
7-1 Summary
of Quantities of Inert C&D Materials
Table
7-2 Summary
of Quantities of C&D Wastes
Table
8-1 Site
Observations of Contract 1
Table
8-2 Site
Observations of Contract 1
Table
9-1 Actions
in the Event of Landfill Gas Being Detected in Excavations
Table
9-2 Summary
of Landfill Gas Measurement Results
Table
10-1 Statistical
Summary of Environmental Complaints
Table
10-2 Statistical
Summary of Environmental Summons
Table
10-3 Statistical
Summary of Environmental Prosecution
Table
11-1 Environmental
Mitigation Measures in the Reporting Month
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 Event and
Action Plan
Appendix F Impact
Monitoring Schedule of the Reporting Month and Coming Month
Appendix G Calibration
Certificates of Equipment and the Accreditation Laboratory Certificate
Appendix H Database of Monitoring
Results
Appendix I Graphical
plots of Monitoring Results
Appendix J Meteorological
Data
Appendix K Waste Flow
Table
Appendix L Implementation
Record of Water Mitigation Measures in the Reporting Month
Appendix M 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
To facilitate management, the proposed Works of Cross
Bay Link, Tseung Kwan O (hereinafter
called “the Project’) was divided into two Civil
Engineering and Development Department (CEDD) Works contracts
included Contract 1 (Contract No. NE/2017/07) and Contract
2 (Contract No. NE/2017/08). The details of each contract Works
are summarized below and the
delineation of each contract is shown in Appendix A.
Contract 1 (Contract No. NE/2017/07)
(i)
400m section of marine viaducts
of steel deck sections including the Eternal Arch Bridge;
(ii)
600m section of marine viaducts
of concrete deck sections;
(iii)
An E&M Plantroom and
associated building services; and
(iv)
E&M provisions.
Contract
2 (Contract No. NE/2017/08)
(i)
Elevated deck structures along Road D9;
(ii)
A 210m section of cycle track and footpath ramp bridge;
(iii)
A 630m section of noise semi-enclosure covering the
entire length of Road D9, and;
(iv)
Lift, staircase, modification
of existing seawall along Road D9, landscaping and miscellaneous works.
1.1.4
The date for commencement of Contract 1 is 3rd
December 2018 while the date for commencement of Contract 2 is 17th
January 2019.
1.1.5
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.
1.1.6
This
is the 29th
Monthly EM&A report presenting the monitoring results and inspection
findings for the reporting period from 1st to 30th
April 2021 (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
|
Air
Quality Monitoring
|
|
Section 5
|
Construction
Noise Monitoring
|
|
Section 6
|
Water Quality
Monitoring
|
|
Section 7
|
Waste
Management
|
|
Section 8
|
Site
Inspections
|
|
Section 9
|
Landfill Gas Monitoring
|
|
Section 10
|
Environmental
Complaints and Non-Compliance
|
|
Section 11
|
Implementation
Status of Mitigation Measures
|
|
Section 12
|
Conclusions
and Recommendations
|
2.1.1
The
project organization is shown in Appendix B. The responsibilities of
respective parties are:
The Project Consultant
2.1.2
The
Project Consultant (hereinafter “the Consultant”) is responsible for overseeing
the construction works and for ensuring that the works are undertaken by the
Contractor in accordance with the specification and contract requirements. The
duties and responsibilities of the Consultant with respect to EM&A are:
·
Monitor
the Contractors’ compliance with contract specifications, including the
implementation and operation of the environmental mitigation measures and their
effectiveness
·
Monitor
Contractors’, ET’s and IEC’s compliance with the requirements in the
Environmental Permit (EP) and EM&A Manual
·
Facilitate
ET’s implementation of the EM&A programme
·
Participate
in joint site inspection by the ET and IEC
·
Oversee
the implementation of the agreed Event / Action Plan in the event of any
exceedance
·
Adhere
to the procedures for carrying out complaint investigation
The Contractor(s) of Works Contract(s)
2.1.3
There
will be one contractor for each individual works contract. The Contractor(s) should report to the Consultant. The duties and responsibilities of the
Contractor are:
·
Comply
with the relevant contract conditions and specifications on environmental
protection
·
Participate
in the site inspections by the ET and IEC, and undertake any corrective actions
·
Provide
information / advice to the ET regarding works programme
and activities which may contribute to the generation of adverse environmental
impacts
·
Submit
proposals on mitigation measures in case of exceedances of Action and Limit
levels in accordance with the Event / Action Plans
·
Implement
measures to reduce impact where Action and Limit levels are exceeded
·
Adhere
to the procedures for carrying out complaint investigation
Environmental
Team (ET)
2.1.4
ET shall
not be in any way an associated body of the Contractor(s) and employed by the Permit Holder
(i.e., CEDD) to conduct the EM&A
programme.
The ET should be managed by the ET Leader. The ET Leader shall be a
person who has at least 7 years’ experience in EM&A and has relevant
professional qualifications. Suitable qualified staff should be included in the
ET, and resources for the implementation of the EM&A programme
should be allocated in time under the Contract(s), to enable fulfillment of the
Project’s EM&A requirements as specified in the EM&A Manual during
construction of the Project. ET
shall report to the Project Proponent and the duties shall include:
·
Conduct baseline monitoring,
impact monitoring and post-construction monitoring and the associated in-situ
and laboratory tests to monitor various environmental parameters as required in
the EM&A Manual and the EP
·
Analyze
the environmental monitoring and audit data, review the success of EM&A programme and the adequacy of mitigation measures implemented,
confirm the validity of the EIA predictions and identify any adverse
environmental impacts arising
·
Carry
out regular site inspection to investigate and audit the Contractors’ site
practice, equipment/plant and work methodologies with respect to pollution
control and environmental mitigation, and effect proactive action to pre-empt
problems
·
Monitor
compliance with conditions in the EP, environmental protection, pollution
prevention and control regulations and contract specifications
·
Audit
environmental conditions on site
·
Report
on the environmental monitoring and audit results to EPD, the Consultant, the IEC and Contractor(s) or their delegated
representatives
·
Recommend
suitable mitigation measures to the Contractor in the case of exceedance of
Action and Limit levels in accordance with the Event and Action Plans
·
Liaise
with the IEC on all environmental performance matters and timely submit all
relevant EM&A proforma for approval by IEC
·
Advise
the Contractor(s) on environmental improvement, awareness, enhancement measures
etc., on site
·
Adhere
to the procedures for carrying out complaint investigation
·
Set up a dedicated web site
where the project information, all environmental monitoring and audit data and
reports described in Condition 5.2 of the EP, and all finalized submissions and
plans required under the EP are to be placed for public inspection
·
Upload the environmental
monitoring results to the dedicated web site in accordance with requirements of the EP and
EM&A Manual
·
To carry out the Operational
Phase Landfill Gas monitoring during effluent drainage system maintenance for
one year
Independent
Environmental Checker (IEC)
2.1.5
IEC
will be employed for this Project.
The Independent Environmental Checker (IEC) should not be in any way an
associated body of the Contractor(s) or the ET for the Project. The IEC should be employed by the Permit Holder
(i.e., CEDD) prior to the
commencement of the construction of the Project. The IEC should have at least 7 years’
experience in EM&A and have relevant professional qualifications. The duty of IEC should be:
·
Provide
proactive advice to the Project Consultant and the Project Proponent on
EM&A matters related to the project, independent from the management of
construction works, but empowered to audit the environmental performance of
construction
·
Review
and audit all aspects of the EM&A programme
implemented by the ET
·
Review
and verify the monitoring data and all submissions in connection with the EP
and EM&A Manual submitted by the ET
·
Arrange
and conduct regular, at least monthly site inspections of the works during
construction phase, and ad hoc inspections if significant environmental
problems are identified
·
Check
compliance with the agreed Event / Action Plan in the event of any exceedance
·
Check
compliance with the procedures for carrying out complaint investigation
·
Check
the effectiveness of corrective measures
·
Feedback
audit results to ET by signing off relevant EM&A proforma
·
Check
that the mitigation measures are effectively implemented
·
Report
the works conducted, the findings, recommendation and improvement of the site
inspections, after reviewing ET’s and Contractor’s works, and advices to the
Project Consultant and Project Proponent on a monthly basis
2.2.1
3-month rolling construction program of the 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 Predrilling,
Pilling Work at Portion I
Ÿ Precast
Pier and box girder installation at Portion II
Ÿ Stage
Concrete for pile caps at portion II
Ÿ ABWF
works, E&M Work and External Work at Portion V Plant Room Building
Ÿ 1,
2, 3 and 4 round arch rib segment assembly
Ÿ Precast
– Pier fabrication for Pier W5
Contract 2 (Contract
No. NE/2017/08)
2.2.3
The major construction activities of Contract 2 undertaken in this
Reporting Period are:-
Ÿ Excavation
(Portion III,VI)
Ÿ Drainage
Installation (Portion VI)
Ÿ Footing
construction(Portion VI)
Ÿ Excavation
& RC works (Superstructure) (Portion III)
Ÿ RC
construction for U-trough(Portion III)
Ÿ Seawall
modification
Ÿ ELS
& manhole construction at SMH012 &SMH011
Ÿ Noise
barrier installation(Portion VI)
2.3
Summary of Environmental Submissions
2.3.1
The required documents list below shall be to submit to EPD for
retention:
Table 2-1 Documents Submission under Environmental Permit
Requirement
|
EP condition
|
Submission to EPD
|
Requirement
|
Situation
|
|
1.11
|
Commencement date of construction of the Project
|
no later than 1 month prior to the commencement of
construction of the Project
|
Ÿ Contract 1 notified EPD on 19 Oct 2018
Ÿ Contract 2 notified
EPD on 12 Dec 2018
|
|
2.3
|
The date of setting up the Community Liaison Group
(CLG), the membership, the terms of reference and the contact details
|
At least 1 month before the commencement of
construction of the Project
|
Ÿ CLG
setting has submitted to EPD on 9
Oct 2018
|
|
2.4
|
Management Organization of Main Construction Companies
|
No later than 2 weeks before the commencement of
construction of the Project
|
Ÿ Management
Organization of Contract 1 was submitted to EPD on 2 October 2018
Ÿ Management
Organization of Contract 2 was submitted to EPD on 12 December 2018
|
|
2.5
|
Waste Management Plan (WMP)
|
No later than 1 month before commencement of
construction of the Project
|
Ÿ WMP of Contract 1 was
submitted to EPD in 11 October 2018
Ÿ WMP of Contract 2 was
submitted to EPD in 14 December 2018
|
|
2.6
|
Landscape Mitigation Plan (LSMP)
|
No later than 1 month before commencement of
construction of the Project
|
Ÿ LSMP was submitted on 1 Nov 2018
|
|
2.7
|
Detailed Qualitative Landfill Gas Hazards
Assessment (QLGHA)
|
No later than 1 month before commencement of construction
of the Project
|
Ÿ QLGHA of the Project was
submitted to EPD on 1 November 2018
|
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/).
2.3.4
Summary of the relevant permits, licenses,
and/or notifications on environmental protection for the Project are presented
in Table 2-2.
Table 2-2 Status
of Environmental Licenses and Permits of the Project Works (Contract 1)
|
Item
|
Description
|
License/Permit
Status
|
|
Permit no./ Account
no./ Ref. no.
|
Valid Period
|
Status
|
|
From
|
To
|
|
1
|
Notification
pursuant to Air pollution Control (Construction
Dust) Regulation
|
--
|
--
|
--
|
Notified on 11 July 2018
|
|
2
|
Chemical
Waste Producer Registration
|
5213-839-C1232-19
|
28 Aug 2018
|
N/A
|
--
|
|
3
|
Water
Pollution Control Ordinance - Discharge
License
|
WT00032842-2018
|
1 Mar 2019
|
31 Mar 2024
|
Valid until 31 March 2024
|
|
WT00034178-2019
|
15 Jul 2019
|
31 Jul 2024
|
Valid until 31 July 2024
|
|
4
|
Billing
Account for Disposal of Construction Waste
|
7031412
|
24 Jul 2018
|
N/A
|
--
|
|
5
|
Construction
Noise Permit
|
GW-RE0331-21
|
09 Apr 2021
|
31 May 2021
|
Valid until 31 May 2021
|
Remark: No
evening work and night work was carried out for Contract 1
Table 2-3 Status of
Environmental Licenses and Permits of the Project Works (Contract 2)
|
Item
|
Description
|
License/Permit Status
|
|
Permit no./ Account no./ Ref. no.
|
Valid Period
|
Status
|
|
From
|
To
|
|
1
|
Notification pursuant to Air pollution Control (Construction Dust) Regulation
|
--
|
--
|
--
|
Notified on 31 October 2018
|
|
2
|
Chemical Waste Producer Registration
|
5213-839-B2500-04
|
22 Nov
2018
|
N/A
|
--
|
|
3
|
Water Pollution Control Ordinance - Discharge
License
|
WT00034244-2019
|
8 Jul 2019
|
31 Jul 2024
|
Valid
until 31 July 2024
|
|
4
|
Billing Account for Disposal of Construction Waste
|
7032702
|
8 Nov 2018
|
N/A
|
--
|
|
5
|
Construction Noise Permit
|
GW-RE0123-21
|
15 Feb 2021
|
14 May 2021
|
Valid
until 14 May 2021
|
Remark: No evening work and night work was carried out for Contract 2
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)
|
Available for
resident occupation in February 2021
|
|
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 4) (Southeast facade)
|
Available for
resident occupation in November 2019
|
|
CNMS-2
|
Lohas Park Stage 1
(Planned Development in Area 86, Package 6) (Southeast facade)
|
Available for
resident occupation in February 2021
|
|
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
1-Hour
TSP air quality and construction noise monitoring was commenced in February
2021 regarding the handover of residential units o
purchases for LP6. However, the installation of High Volume Sampler (HVS) for
24-Hour TSP is still pending approval from LP6 property management team.
Therefore, the 24-Hour TSP will be commenced once the approval was obtained
from LP6 property management team.
3.3.4
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 Designated and interim alternative location
for air quality and noise monitoring in the Reporting Period
|
Location ID
|
Monitoring Parameter
|
Location
|
|
AM2
|
1-Hour TSP Air
Quality
|
Lohas Park Phase 6
|
|
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-2
|
Noise (Leq, L10 & L90)
|
Lohas Park Package 6
|
|
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
3.3.5
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.
Air Quality Monitoring
3.5.1
The 24-hour and 1-hour TSP levels shall be measured by following
the standard high volume sampling method as set out in the Title 40 of the Code of Federal Regulations, Chapter 1 (Part 50), Appendix B. If the ET proposes to use a direct
reading dust meter to measure 1-hour TSP levels, it shall submit sufficient
information to the IEC to prove that the instrument is capable
of achieving a comparable results to the HVS. The instrument should be calibrated
regularly, and the 1-hour sampling shall be determined on yearly basis by the
HVS to check the validity and accuracy of the results measured by direct
reading method. The filter paper of 24-hour
TSP measurement shall be determined by HOKLAS accredited laboratory. The equipment used for air quality
monitoring is listed in Table 3-6.
Table 3-6 Air Quality
Monitoring Equipment
|
Equipment
|
Model
|
|
24-hour TSP
|
High Volume Air Sampler
|
TISCH High
Volume Air Sampler, HVS Model TE-5170
|
|
Calibration Kit
|
TISCH Model TE-5025A
(S/N: 1612)
|
|
1- hour TSP
|
Portable Dust Meter
|
Laser Dust Monitor Sibata LD-3B Laser Dust Monitor (S/N: 3Y6503 & 366410)
|
Noise Monitoring
3.5.2
Sound level meter in compliance with the International Electrotechnical Commission Publications 651: 1979 (Type 1)
and 804: 1985 (Type 1) specifications shall be used for carrying out the noise
monitoring. The sound level meter
shall be checked using an acoustic calibrator. The wind speed shall be checked with a
portable wind speed meter capable of measuring the wind speed in ms-1. Noise equipment will be used for impact monitoring is
listed in Table 3-7.
Table 3-7 Construction
Noise Monitoring Equipment
|
Equipment
|
Model
|
|
Integrating Sound Level Meter
|
Rion NL-52 ( S/N:00142581)
|
|
Calibrator
|
Rion NC-74 (S/N:34246492)
|
|
Portable Wind Speed Indicator
|
Anemometer
AZ Instrument 8908
|
Water Quality Monitoring
3.5.3
For
water quality monitoring, the equipment should fulfill the requirement under
the Approved EM&A Manual Section 7.2. The requirement is summarized below:
•
Dissolved Oxygen and Temperature Measuring
Equipment – The instrument should be a portable, weatherproof dissolved oxygen
measuring instrument completed with cable, sensor, comprehensive operation
manuals, and should be operable from a DC power source. It should be capable of
measuring: dissolved oxygen levels in the range of 0-20 mg/L and 0-200% saturation;
and a temperature of 0-45 degrees Celsius. It should have a membrane electrode
with automatic temperature compensation complete with a cable of not less than
35 m in length. Sufficient stocks of spare electrodes and cable should be
available for replacement where necessary.
•
Turbidity Measurement Equipment – The
instrument shall be a portable, weatherproof turbidity-measuring instrument
complete with comprehensive operation manual. The equipment shall use a DC
power source. It shall have a photoelectric sensor capable of measuring
turbidity between 0-1000 NTU.
•
Salinity Measurement Instrument – A portable salinometer
capable of measuring salinity in the range of 0-40 ppt
should be provided for measuring salinity of the water at each monitoring
location.
•
Water Depth Detector – A portable, battery-operated echo sounder
should be used for the determination of water depth at each designated
monitoring station. A detector affixed to the bottom of the works boat, if the
same vessel is to be used throughout the monitoring programme,
is preferred.
•
Positioning Device – hand-held or boat-fixed type digital Global
Positioning System (GPS) with way point bearing indication or other equipment
instrument of similar accuracy, should be provided and used during water quality
monitoring to ensure the monitoring vessel is at the correct location before
taking measurements.
•
Water Sampling Equipment – A water sampler, consisting of a
transparent PVC or glass cylinder of not less than two liters, which can be
effectively sealed with cups at both ends, should be used. The water sampler
should have a positive latching system to keep it open and prevent premature
closure until released by a messenger when the sampler is at the selected water
depth.
3.5.4
Equipment
used for water quality impact monitoring is listed in Table 3-8.
Table 3-8 Water
Monitoring Equipment
|
Equipment
|
Model
|
|
A Digital Global Positioning System
|
GPS12
Garmin
|
|
Water Depth Detector
|
Eagle Sonar CUDA 300
|
|
Water Sampler
|
A 2-litre transparent PVC
cylinder with latex cups at both ends
|
|
Thermometer & DO meter
|
YSI
ProDSS Digital Sampling System Water Quality Meter
|
|
pH meter
|
|
Turbidimeter
|
|
Salinometer
|
|
Sample Container
|
High density polythene
bottles (provided by laboratory)
|
|
Storage Container
|
‘Willow’ 33-litter plastic
cool box with Ice pad
|
Air Quality
1-hour TSP
3.6.1
The
1-hour TSP monitor was a brand named “Sibata LD-3 Laser Dust monitor Particle Mass
Profiler & Counter” which is a
portable, battery-operated laser photometer. The 1-hour TSP meter provides a real
time 1-hour TSP measurement based on 90o light scattering. The 1-hour TSP monitor consists of the
following:
(a.)
A pump
to draw sample aerosol through the optic chamber where TSP is measured;
(b.)
A
sheath air system to isolate the aerosol in the chamber to keep the optics
clean for maximum reliability; and
(c.)
A
built-in data logger compatible with Windows based program to facilitate data
collection, analysis and reporting.
24-hour TSP
3.6.2
The
equipment used for 24-hour TSP measurement is TISCH,
Model TE-5170 TSP High Volume Air Sampler, which complied with EPA Code of Federal Regulation, Appendix B
to Part 50. The High Volume Air Sampler (HVS) consists of the following:
(a.)
An anodized
aluminum shelter;
(b.)
A
8”x10” stainless steel filter holder;
(c.)
A
blower motor assembly;
(d.)
A
continuous flow/pressure recorder;
(e.)
A
motor speed-voltage control/elapsed time indicator;
(f.)
A
7-day mechanical timer, and
(g.)
A
power supply of 220v/50 Hz
3.6.3
For HVS for 24-hour TSP monitoring, the HVS is mounted in a
metallic cage with a top for protection and also it is sat on the existing
ground or the roof of building. The
flow rate of the HVS between 0.6m3/min and 1.7m3/min will
be properly set in accordance with the manufacturer’s instruction to within the
range recommended in EPA Code of Federal
Regulation, Appendix B to Part 50. Glass Fiber Filter 8" x 10" of
TE-653 will be used for 24-Hour TSP monitoring and would be supplied by
laboratory. The general procedures
of sampling are described as below:-
Ÿ A horizontal platform with
appropriate support to secure the samples against gusty wind should be
provided;
Ÿ No two samplers should be
placed less than 2 meters apart;
Ÿ The distance between the
sampler and an obstacle, such as building, must be at least twice the height
that the obstacle protrudes above the sample;
Ÿ A minimum of 2 meters of
separation from any supporting structure, measured horizontally is required;
Ÿ Before placing any filter media
at the HVS, the power supply will be checked to ensure the sampler work
properly;
Ÿ The filter paper will be set to
align on the screen of HVS to ensure that the gasket formed an air tight seal
on the outer edges of the filter.
Then filter holder frame will be tightened to the filter hold with swing
bolts. The holding pressure should
be sufficient to avoid air leakage at the edge.
Ÿ The mechanical timer will be
set for a sampling period of 24 hours (00:00 mid-night to 00:00 mid-night next
day). Information will be recorded
on the field data sheet, which would be included the sampling data, starting
time, the weather condition at current and the filter paper ID with the initial
weight;
Ÿ After sampling, the filter
paper will be collected and transfer from the filter holder of the HVS to a
sealed envelope and sent to a local HOKLAS accredited laboratory for
quantifying.
3.6.4
All the sampled 24-hour TSP filters will be kept in normal air
conditioned room conditions, i.e. 70% HR (Relative Humidity) and 25oC,
for six months prior to disposal.
3.6.5
The HVS used for 24-hour TSP monitoring will be calibrated in two
months interval for in accordance with the manufacturer’s instruction using the
NIST-certified standard calibrator (Tisch Calibration
Kit Model TE-5025A) to establish a relationship between the follow recorder meter
reading in cfm (cubic feet per minute) and the standard flow rate, Qstd, in m3/min. Motor brushes of HVS will be regularly
replaced. The calibration certificates of the air
quality monitoring equipment used for the impact monitoring and the HOKLAS accredited certificate of
laboratory was provided in
Appendix G.
Noise Monitoring
3.6.6
As referred to in the Technical Memorandum (TM) issued under the
NCO, sound level meters in compliance with the International Electrotechnical Commission Publications 651:1979 (Type 1)
and 804:1985 (Type 1) specifications shall be used for carrying out the noise
monitoring. Immediately prior to and following each noise measurement the
accuracy of the sound level meter shall be checked using an acoustic calibrator
generating a known sound pressure level at a known frequency. Measurements may
be accepted as valid only if the calibration levels from before and after the
noise measurement agree to within 1.0 dB.
3.6.7
All noise measurements will be performed with the meter set to
FAST response and on the A-weighted equivalent continuous sound pressure level (Leq). Leq(30 min) in six
consecutive Leq(5 min) measurements will be used as the
monitoring parameter for the time period between 07:00-19:00 hours on weekdays
throughout the construction period.
3.6.8
The sound level meter will be mounted on a tripod at a height of 1.2
m and placed at the assessment point and oriented such that the microphone is
pointed to the site with the microphone facing perpendicular to the line of sight. The windshield will
be fitted for all measurements. Where a measurement is to be carried out
at a building, the assessment point would normally be at a position 1 m from
the exterior of the building façade. Where a measurement is to be made for
noise being received at a place other than a building, the assessment point
would be at a position 1.2 m above the ground in a free-field situation, i.e.
at least 3.5 m away from reflective surfaces such as adjacent buildings or
walls.
3.6.9
Immediately prior to and following each noise measurement the
accuracy of the sound level meter will be checked using an acoustic calibrator generating a
known sound pressure level at a known frequency. Measurements will be accepted as valid
only if the calibration level from before and after the noise measurement agrees
to within 1.0 dB.
3.6.10
Noise measurements will not be made in fog, rain, wind with a
steady speed exceeding 5m/s or wind with gusts exceeding 10m/s. The wind speed will be checked
with a portable wind speed meter capable of measuring the wind speed in m/s.
3.6.11
The sound level meter and calibrator are
calibrated and certified by a laboratory accredited under HOKLAS or any other
international accreditation scheme at yearly basis. The calibration certificates of noise monitoring
equipment used for the impact monitoring was provided in
Appendix G.
Marine
Water Quality
3.6.12
Marine water quality monitoring would be conducted at all designated locations in accordance with Table 7.1 of the approved EM&A Manual. The procedures
of water sampling, in-situ measurement and chemical analysis are described as
below:
Ÿ A Global
Positioning System (GPS) will be used to ensure that the correct location was
selected prior to sample collection.
A portable, battery-operated echo sounder was used for the determination
of water depth at each designated monitoring station.
Ÿ The marine water sampler will be lowered into the water body at a
predetermined depth. The trigger system of the sampler is activated with a
messenger and opening ends of the sampler are closed accordingly then the
sample of water is collected.
Ÿ During the sampling, the
sampling container will be rinsed to
use a portion of the marine water sample before the water sample is transferred
to the container. Upon sampling
completion, the container will be sealed with a screw cap.
Ÿ Before the sampling process,
general information such as the date and time of sampling, weather condition
and tidal condition as well as the personnel responsible for the monitoring will be recorded on the monitoring field
data sheet.
Ÿ In-situ measurement including
water temperature, turbidity, dissolved oxygen, salinity, pH
and water depth will be recorded at the identified monitoring station and depth. At
each station, marine water samples will be collected at three depths: 1m below
water surface, 1m above sea bottom and at mid-depth when the water depth
exceeds 6m. Samples at 1m below
water surface and 1m above sea bottom will be collected when the water depth is
between 3m and 6m. And sample at
mid-depth will be taken when the water depth is below 3m.
Ÿ
For the in-situ measurement, two consecutive
measurements of sampling depth, temperature, dissolved oxygen, salinity,
turbidity and pH concentration will be measured at the sea. The YSI ProDSS Multifunctional Meter will be retrieved
out of the water after the first measurement and then re-deployed for the
second measurement. Where the
difference in the value between the first and second readings of each set is
more than 25% of the value of the first reading, the reading is discarded and
further readings is taken.
Ÿ Marine
water sample will be collected by using a water sampler. The high-density
polythene bottles will be filled after the water sample collected from the
sea. Before the water sample being
fills into the sampling bottles, the sampling bottles will be pre-rinsed with
the same water sample. The sampling
bottles will then be packed in cool-boxes (cooled at 4OC without
being frozen), and delivered to HOKLAS accredited laboratory for the
chemical analysis as followed APHA Standard
Methods for the Examination of Water and Wastewater 19ed 2540D, unless otherwise specified.
3.6.13
Before each round of monitoring, the
dissolved oxygen probe will be calibrated by wet bulb method; a zero check in
distilled water will be performed with the turbidity and salinity probes. The
turbidity probe also will be checked with a standard solution of known NTU and
known value of the pH standard solution were used to check the accuracy of pH value before each monitoring day. Moreover, all in-situ measurement equipment used marine water
monitoring will be calibrated at three months interval.
Laboratory Analysis
3.6.14
All water samples included the duplicate samples, was tested with
chemical analysis as specified in the EM&A Manual by a
HOKALS accredited laboratory - ALS Technichem (HK) Pty Ltd. The
chemicals analysis method and reporting limit show Table 3-9.
Table 3-9 Testing
Method and Reporting Limit of the Chemical Analysis
|
Parameter
|
ALS Method Code
|
In-house
Method Reference (1)
|
Reporting Limit
|
|
Total Suspended Solids
|
EA025
|
APHA
2540D
|
1 mg/L
|
Note:
1.
The exact method
shall depend on the laboratory accredited method. APHA
= Standard Methods for the Examination of Water and Wastewater by the American
Public Health Association.
3.6.15
The determination works will start within 24 hours after
collection of the water samples or within the holding time as advised by the
laboratory.
Meteorological
Information
3.6.16
The meteorological information including wind direction, wind speed,
humidity and temperature etc. of impact monitoring is extracted from
the closest Tseung Kwan
O Hong Kong
Observatory Station. Moreover, the
data of rainfall and air pressure would be extracted from King’s Park Station.
3.6.17
For marine
water quality monitoring, tidal information would be referred to tide gauge at Tai Miu Wan.
3.7.1
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
3-10, 3-11 and 3-12 respectively.
Table
3-10 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
|
|
AM2
|
278
|
NA
|
500
|
NA
|
|
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 3-11 Action
and Limit Levels for Construction Noise, dB(A)
|
Monitoring Location
|
Action Level
|
Limit Level
|
|
CNMS-1
CNMS-2
CNMS-5
|
Time Period: 0700-1900 hours on normal weekdays (Leq30min)
|
|
When
one or more documented complaints are received
|
75 dB(A)
|
|
Time Period: 1900-2300 hours on all days (Leq15min)
|
|
When
one or more documented complaints are received
|
55 dB(A)
|
|
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
3-12 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
|
|
|
|
|
|
|
|
3.7.2
Should
non-compliance of the environmental quality criteria occurs, remedial actions
will be triggered according to the Event and Action Plan which presented in Appendix
E.
3.8.1
All monitoring data will be handled by the ET’s in-house data recording and
management system. The monitoring data recorded in
the equipment will be downloaded directly from the equipment at the end of each
monitoring day. The downloaded
monitoring data will input into a computerized database properly maintained by
the ET. The laboratory results will
be input directly into the computerized database and checked by personnel other
than those who input the data.
3.8.2
For monitoring parameters that require laboratory analysis, the
local laboratory shall follow the QA/QC requirements as set out under the
HOKLAS scheme for the relevant laboratory tests.
4.1.1
As notified that Lohas
Park Package 6 was available for resident occupation in late January 2021, air quality
monitoring at designated
monitoring location AM2 was therefore commenced in February 2021. Since
the installation of High Volume Sampler for 24-Hour TSP monitoring is under
review by Property Management Team of Lohas Park Package 6, the 24-Hour
TSP at designated
monitoring location AM2 will be commenced once approval was obtained.
4.1.2
In the Reporting Period, 1-Hour TSP monitoring was performed at designated monitoring location
AM2 and interim alternative monitoring
locations AM4, and 24-Hr TSP of air quality monitoring was performed at interim alternative monitoring locations AM5. The air
quality monitoring schedule is presented in Appendix F.
4.1.3
Valid calibration certificates of monitoring
equipment are shown in Appendix G and the monitoring results are summarized in the following
sub-sections
4.2.1
During the Reporting Period, 42 sessions of 1-hour TSP and 6 sessions of 24-hours TSP monitoring were carried out and the monitoring
results are summarized in Table 4-1 and Table 4-2. The detailed 24-hour TSP monitoring data are presented in Appendix H and the relevant graphical plots are shown in Appendix I.
Table 4-1 1-Hour
TSP Air Quality Impact Monitoring Results for AM4 and 24-Hour TSP Air Quality
Impact Monitoring Results for AM5
|
AM5
|
AM4
|
|
24-Hr TSP (mg/m3)
|
1-Hour TSP (mg/m3)
|
|
Date
|
Meas. Result
|
Date
|
Start Time
|
1st Meas.
|
2nd Meas.
|
3rd Meas.
|
|
1-Apr-21
|
50
|
1-Apr-21
|
13:04
|
83
|
75
|
72
|
|
7-Apr-21
|
128
|
7-Apr-21
|
14:06
|
89
|
95
|
101
|
|
13-Apr-21
|
30
|
9-Apr-21
|
9:10
|
85
|
79
|
74
|
|
19-Apr-21
|
94
|
14-Apr-21
|
13:41
|
75
|
78
|
81
|
|
24-Apr-21
|
122
|
20-Apr-21
|
9:48
|
66
|
77
|
72
|
|
29-Apr-21
|
66
|
26-Apr-21
|
14:02
|
79
|
84
|
88
|
|
--
|
--
|
30-Apr-21
|
13:14
|
81
|
76
|
71
|
|
Average
(Range)
|
82
(30
– 128)
|
Average
(Range)
|
80
(66
– 101)
|
Table 4-2 1-Hour
TSP Air Quality Impact Monitoring Results for AM2
|
AM2
|
|
1-Hour TSP (mg/m3)
|
|
Date
|
Start Time
|
1st Meas.
|
2nd Meas.
|
3rd Meas.
|
|
1-Apr-21
|
9:33
|
89
|
76
|
79
|
|
7-Apr-21
|
13:09
|
98
|
106
|
111
|
|
9-Apr-21
|
9:30
|
89
|
86
|
88
|
|
14-Apr-21
|
13:18
|
74
|
77
|
70
|
|
20-Apr-21
|
9:28
|
79
|
68
|
75
|
|
26-Apr-21
|
13:40
|
84
|
87
|
79
|
|
30-Apr-21
|
13:07
|
86
|
75
|
81
|
|
Average
(Range)
|
84
(68
– 111)
|
4.2.2
As
shown in Table 4-1 and Table 4-2, 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.
4.2.3
The meteorological data during impact monitoring period is summarized in Appendix J.
5.1.1
As notified that Lohas
Park Package 6 was available for resident occupation in late January 2021, construction
noise monitoring at designated
monitoring location CNMS-2 was therefore commenced in February 2021.
5.1.2
In the Reporting Period, construction noise quality
monitoring was performed at designated monitoring location CNMS-1 & CNMS-2, and interim alternative monitoring location CNMS-5. The construction
noise monitoring schedule is presented in Appendix F.
5.1.3
Valid calibration certificates of monitoring
equipment is shown in Appendix G and the construction noise monitoring results are summarized in
the following sub-sections:
5.2.1
15 sessions of daytime construction noise monitoring were performed at both the
designated monitoring location CNMS-1 & CNMS-2 and the interim alternative
location CNMS-5 in the reporting period. The daytime noise monitoring results are
summarized in Table 5-1 to Table 5-3. The detailed noise monitoring data are presented in Appendix H and the relevant graphical plots are shown in Appendix I.
Table 5-1 Daytime
Construction Noise Impact Monitoring Results at CNMS-1
|
Date
|
Time
|
Measurement Result (dB(A))
|
|
Leq30min
|
Façade Correction
|
|
1-Apr-21
|
14:02
|
68.2
|
NA
|
|
7-Apr-21
|
14:58
|
74.2
|
NA
|
|
14-Apr-21
|
14:46
|
72.0
|
NA
|
|
20-Apr-21
|
10:38
|
65.3
|
NA
|
|
26-Apr-21
|
13:36
|
72.2
|
NA
|
Table 5-2 Daytime
Construction Noise Impact Monitoring Results at CNMS-2
|
Date
|
Time
|
Measurement Result (dB(A))
|
|
Leq30min
|
Façade Correction
|
|
1-Apr-21
|
13:19
|
66.3
|
NA
|
|
7-Apr-21
|
13:06
|
66.8
|
NA
|
|
14-Apr-21
|
15:23
|
66.0
|
NA
|
|
20-Apr-21
|
9:48
|
65.7
|
NA
|
|
26-Apr-21
|
14:22
|
71.6
|
NA
|
Table 5-3 Daytime
Construction Noise Impact Monitoring Results at CNMS-5
|
Date
|
Time
|
Measurement Result (dB(A))
|
|
Leq30min
|
Façade Correction
|
|
1-Apr-21
|
14:48
|
62.4
|
NA
|
|
7-Apr-21
|
14:03
|
67.3
|
NA
|
|
14-Apr-21
|
13:44
|
69.4
|
NA
|
|
20-Apr-21
|
11:22
|
64.3
|
NA
|
|
26-Apr-21
|
15:19
|
62.8
|
NA
|
5.2.2
As shown in
Table
5-1 to Table 5-3, all the
measured results were below 75dB(A)
of the acceptance criteria. No
adverse weather condition which may affect the monitoring result was
encountered during the course of noise monitoring in the reporting period.
5.2.3
No evening noise monitoring was carried
out at both the designated monitoring location CNMS-1 & CNMS-2, and the
interim alternative location CNMS-5.
6.1.1
According to the approved EM&A Manual Section 7.6.1, the
impact marine water quality monitoring work shall be carried out during the CBL
piling and pile excavation works (marine construction activity) of the Project.
Impact marine water quality monitoring was commenced in December 2018 when CBL
piling and pile excavation works started.
6.1.2
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 and IEC has
no particular comment on this arrangement.
6.1.3
No impact water quality monitoring was therefore carried out in
the reporting period.
7.1.1
Waste management would be carried out by an on-site Environmental
Officer or an Environmental Consultant from time to time.
7.2.1
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
7.2.2
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 7-1 and 7-2.
Table 7-1 Summary of
Quantities of Inert C&D Materials
|
Type of Waste
|
Contract 1
|
Contract 2
|
|
Quantity
|
Disposal Location
|
Quantity
|
Disposal Location
|
|
Total
C&D Materials (Inert) (‘000m3)
|
0.018
|
-
|
2.634
|
-
|
|
Reused
in this Contract (Inert) (‘000m3)
|
0
|
-
|
0
|
-
|
|
Reused
in other Projects (Inert) (‘000m3)
|
0
|
-
|
0
|
-
|
|
Disposal
as Public Fill (Inert) (‘000m3)
|
0.018
|
TKO 137
|
2.634
|
TKO 137
|
|
Imported
Fill (‘000m3)
|
0
|
-
|
0
|
-
|
Table 7-2 Summary
of Quantities of C&D Wastes
|
Type of Waste
|
Contract 1
|
Contract 2
|
|
Quantity
|
Disposal Location
|
Quantity
|
Disposal Location
|
|
|
0
|
-
|
0.006
|
Collected by licensed collector
|
|
Recycled
Paper / Cardboard Packing (‘000kg)
|
0.121
|
Collected by paper recycling company
|
0.050
|
Collected by paper recycling company
|
|
Recycled
Plastic (‘000kg)
|
0
|
-
|
0.020
|
Collected by licensed collector
|
|
Chemical
Wastes (‘000kg)
|
0
|
-
|
0
|
-
|
|
General
Refuses (‘000m3)
|
0.283
|
NENT
|
0.026
|
NENT
|
7.2.3
The Monthly Summary Waste Flow Table of the Contracts 1 and
Contract 2 are shown in Appendix K.
8.1.1
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
8.2.1
In this Reporting Month, weekly joint site inspection to evaluate site environmental performance for the Contract 1 was carried out by the Project Consultant, ET and
the Contractor
on 7, 14, 21 & 28 April 2021. Moreover, the Independent Environmental Checker (IEC) monthly site
inspection was conducted on 14 April 2021.
8.2.2
The
findings / deficiencies of Contract 1
that observed during the weekly site inspection are listed in Table
8-1 and the site layout plan was provided in Appendix A.
Table 8-1 Site
Observations of the Contract 1 (Contract No. NE/2017/07)
|
Date
|
Findings / Deficiencies
|
Follow-Up Status
|
|
7 April 2021
|
•
No adverse environmental issue was observed.
|
•
NA
|
|
14 April 2021
|
•
No adverse environmental issue was observed.
|
•
NA
|
|
21 April 2021
|
•
No adverse environmental issue was observed.
|
•
NA
|
|
28 April 2021
|
•
No adverse environmental issue was observed.
|
•
NA
|
Contract
2
8.2.3
In this Reporting Month, weekly joint site inspection to evaluate site environmental performance for the Contract 2 were carried out by the Project Consultant, ET and
the Contractor
on 7, 14, 21 & 28 April 2021. Moreover, the Independent Environmental Checker (IEC) monthly site
inspection was conducted on 14 April 2021.
8.2.4
The
findings / deficiencies of Contract 2
that observed during the weekly site inspection are listed in Table
8-2 and the site layout plan was provided in Appendix A.
Table 8-2 Site
Observations of the Contract 2 (Contract No. NE/2017/08)
|
Date
|
Findings /
Deficiencies
|
Follow-Up
Status
|
|
7 April 2021
|
Observation:
•
Broken noise barriers should be replaced and make sure noise mitigation
is implemented properly. (Portion VI)
|
•
The broken noise barrier has been replaced.
|
|
14 April 2021
|
Observation:
•
Stagnant water cumulated inside the drip tray should be cleaned.
(Portion VI)
•
Broken NRMM label should be replaced. (Portion VI)
|
•
The stagnant water has been removed.
•
The NRMM label has been replaced.
|
|
21 April 2021
|
Observation:
•
Drip tray should be provided for chemical storage on-site. (Portion VI)
|
•
The chemical contrainer was removed.
|
|
28 April 2021
|
•
No adverse environmental issue was observed.
|
•
NA
|
8.3.1
During
the inspection of the reporting month, implementation of
surface runoff mitigation measures were observed in both Contracts. The
surface runoff mitigation measures observed during the weekly site inspection
of Contract 1 and Contract 2 are summarized below and the photo recorded was
provided in Appendix
L.
Contract 1 (Contract No. NE/2017/07)
8.3.2
The surface runoff mitigation measures of Contract 1 implemented in this Reporting Period are:-
Ÿ Treatment facilities was installed at site to treat the site
generated water prior discharge.
Contract
2 (Contract
No. NE/2017/08)
8.3.3
The surface runoff mitigation measures of Contract 2 implemented in this Reporting Period are:-
Ÿ Treatment facilities was installed at site to treat the site
generated water prior discharge.
8.3.4
Overall,
the surface runoff mitigation measures of Contract 1 and Contract 2 observed during
the inspection of the reporting period are efficient.
9.1.1
Pursuant to
Section 13 of the Project’s EM&A Manual, landfill gas monitoring shall
perform during excavation work 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.
9.1.2
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.
9.2.1
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 9-1.
Table
9-1 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%
|
9.2.2
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.
9.3.1
In the
Reporting Period, landfill gas monitoring was conducted at the zone Wan O Road
which excavation work of Contract 2 was carried out. A
Crowcon gas detector was used for the landfill gas monitoring and the valid
calibration certificate is presented in Appendix G.
9.3.2
There
were a total of 22 days monitoring were carried by the Safety Officer or an approved
and qualified persons. The results of landfill gas measurement are
summarized in Table 9-2. Moreover, database of
monitoring result is attached in Appendix
H.
Table 9-2 Summary
of Landfill Gas Measurement Results
|
Landfill
Gas Parameter
|
Action Level
|
Limit Level
|
Detectable at LMR
|
|
Min
|
Max
|
|
Methane
|
>10% LEL (>0.5% v/v)
|
>20% LEL (>1% v/v)
|
0.0%
|
0.0%
|
|
Oxygen
|
<19%
|
<18%
|
20.6%
|
20.8%
|
|
Carbon Dioxide
|
>0.5%
|
>1.5%
|
0.0%
|
0.0%
|
9.3.3
The measurement results shown that slightly methane
and Carbon Dioxide concentration were detected, oxygen
concentration measured was over 19.0 %.
No exceedance was triggered and therefore no corrective action was
required accordingly.
10.1.1
In
the Reporting Period, two (2) environmental complaints were
received with respect to water quality and noise arising from the Project.
Besides, no summons
and prosecution under the EM&A Programme was
lodged for the project. Investigation for the complaints was
undertaken by the ET and presented below.
Complaint
received on 12 April 2021
10.1.2
A
complaint was received by 1823 regarding the marine water pollution at seaside
of Portion III and Portion VII on 12 April 2021.
10.1.3
As
advised by the Contractor of Contract 2, backfilling work was carried out at
Portion III and formwork erection work was carried out at Portion VII on 12
April 2021 near the complaint location. No concreting works was carried out on
12 April 2021 at Portion III and VII.
10.1.4
According
to the photo record provided by the complainant, no construction work which
might potentially produce sewage/muddy water was observed at that location. In
addition, it is observed the site surface at Portion III and Portion VII was
dry on 12 April 2021 and no trace of surface runoff/wastewater direct discharge
from site was observed.
10.1.5
The
Investigation conducted by the ET revealed that the complaint is unlikely due
to the Project since no sewage/muddy water would be generated by the
construction work carried out at Portion III and Portion VII on 12 April 2021
and no trace of surface runoff/wastewater direct discharge was observed.
Complaint
received on 29 April 2021
10.1.6
A
complaint was received by EPD regarding the noise nuisance caused by the
operation of an automatic rebar cutting machine.
10.1.7
The
complaint was under investigation and the investigation result of this
complaint will be provided in the next report.
10.1.8
The statistical summary table of
environmental complaint is presented in Tables 10-1, 10-2 and 10-3.
Table 10-1 Statistical
Summary of Environmental Complaints
|
Reporting Period
|
Contract
|
Environmental Complaint Statistics
|
|
Frequency
|
Cumulative
|
Complaint Nature
|
|
1 – 30 April 2021
|
1
|
0
|
16
|
NA
|
|
1 – 30 April 2021
|
2
|
2
|
11
|
Water
& Noise
|
Table 10-2 Statistical
Summary of Environmental Summons
|
Reporting Period
|
Contract
|
Environmental Summons Statistics
|
|
Frequency
|
Cumulative
|
Summons Nature
|
|
1 – 30 April 2021
|
1
|
0
|
0
|
NA
|
|
1 – 30 April 2021
|
2
|
0
|
0
|
NA
|
Table 10-3 Statistical
Summary of Environmental Prosecution
|
Reporting Period
|
Contract
|
Environmental Prosecution Statistics
|
|
Frequency
|
Cumulative
|
Prosecution Nature
|
|
1 – 30 April 2021
|
1
|
0
|
0
|
NA
|
|
1 – 30 April 2021
|
2
|
0
|
0
|
NA
|
11.1.1
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 M.
11.1.2
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 11-1 and
photo record of water mitigation measure was provided in Appendix L.
Table 11-1 Environmental Mitigation
Measures in the Reporting Month
|
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.
|
11.2.1
Tentative
construction activities to be undertaken in May 2021
should be included:-
Contract
1
Ÿ Construction Cast in-situ diaphragm, installation of second
Batch of Precast Deck and side span within Portion II, III, IV and VI
Ÿ E&M installation work and external work within Portion V
Ÿ Pre-Drilling, Bored Piling, Pile Cap Construction and Pier
construction within Portion I
Contract
2
Ÿ Excavation (Portion III,VI)
Ÿ Drainage Installation (Portion VI)
Ÿ Footing construction(Portion VI)
Ÿ Excavation & RC works (Superstructure) (Portion III)
Ÿ RC construction for U-trough(Portion III)
Ÿ Seawall modification
Ÿ ELS & manhole construction at SMH012 &SMH011,lift shaft
Ÿ Noise barrier installation(Portion VI)
Ÿ Backfilling (Portion VI)
11.3.1
Potential
environmental impacts arising from the works of the Contracts 1 and Contract 2 include:
·
Construction waste
·
Air quality
·
Construction noise
·
Water quality
11.3.2
Environmental
mitigation measures shall be properly implemented and maintained as per the
Mitigation Implementation Schedule in Appendix M
to ensure site environmental performance is acceptable.
12.1.1
This is the monthly
EM&A report as presented the monitoring results and inspection findings for
the reporting period from 1st to 30th April 2021.
12.1.2
In the Reporting Period, one construction noise action level exceedance was recorded and
investigation for the complaints was undertaken by ET and considered that was
Project related.
12.1.3
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.
12.1.4
In the Reporting Period, two (2) environmental complaints were recorded for the Project with respect to water
quality and noise arising from the Project. Investigation for the water quality complaint
received on 12 April 2021 was undertaken
by ET and considered it is not Project-related. For the noise complaint
received on 29 April 2021, the complaint was under investigation and the
investigation result will be provided in the next report.
12.1.5
No
notification of summons or prosecution were received and recorded for the Project.
12.2.1
Due to
wet season has approached, the Contractor was reminded that all the works being
undertaken must fulfill environmental statutory requirements and to paid
attention to water quality mitigation measures to prevent surface runoff into
nearby water bodies or public areas.
12.2.2
Construction
noise would be the key environmental issue as Lohas Park Phase 4 & 6 were already available
for resident occupation. The noise mitigation
measures such as use of quiet plants and installation of temporary noise
barrier at the construction noise predominate area should be fully implemented in
accordance with the EM&A requirement.
