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 21
6.1 General 21
7. Waste Management 22
7.1 General
Waste Management 22
7.2 Records
of Waste Quantities 22
8. Site Inspection 23
8.1 Requirements 23
8.2 Findings
/ Deficiencies During the Reporting Month 23
8.3 Implementation
Status of Surface Runoff Mitigation Measures During the Reporting Month 24
9. Landfill Gas
Monitoring 25
9.1 General
Requirement 25
9.2 Limit
Levels and Event and Action Plan 25
9.3 Landfill
Gas Monitoring 25
10. Environmental Complaint and
Non-Compliance 27
10.1 Environmental
Complaint, Summons and Prosecution 27
11. Implementation Status of
Mitigation Measures 28
11.1 General
Requirements 28
11.2 Tentative
Construction Activities in the Coming Month 28
11.3 Impact
Forecast 29
12. Conclusions and Recommendations 30
12.1 Conclusions 30
12.2 Recommendations 30
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
and 24-Hour TSP Air Quality Impact Monitoring results
Table 5-1 Daytime
Construction Noise Impact Monitoring results at CNMS-1
Table 5-2 Daytime
Construction Noise Impact Monitoring results at CNMS-5
Table 5-3 Evening
Construction Noise Impact Monitoring results at CNMS-1
Table 5-4 Evening 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 18th
Monthly EM&A report presenting the monitoring results and inspection
findings for the reporting period from 1st to 31st
May 2020 (hereinafter ‘the Reporting Period’).
1.2.1
The
Environmental Monitoring and Audit (EM&A) Monthly
Report is structured into the following sections:-
|
Section 1
|
Introduction
|
|
Section 2
|
Project Organization and
Construction Progress
|
|
Section 3
|
Summary
of Impact Monitoring Requirements
|
|
Section 4
|
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 Precast shell Installation at Portion II
Ÿ 1st and 2nd Stage of Pile caps concreting
work at Portion II
Ÿ Fabrication
of bottom deck panels, top deck panels and diaphragm panels at Portion II
Ÿ Fabrication
of arch panel at Portion II
Ÿ ABWF
work at Portion V
Ÿ E&M
installation at Portion V
Contract 2 (Contract
No. NE/2017/08)
2.2.3
The major construction activities of Contract 2 undertaken in this
Reporting Period are:-
Ÿ Pre-bored
Socket H-Pile (Portion VI)
Ÿ Excavation
(Portion VI)
Ÿ Sheet
Pilling (Portion VI)
Ÿ Drainage
Installation (Portion VI)
Ÿ Footing
construction(Portion VI)
Ÿ Excavation
& RC works (Superstructure) (Portion III)
Ÿ Desilting
works at 1800 drain pipe(Portion III)
Ÿ Trimming
Bored pile head (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-RE0308-20
|
7 May 2020
|
27 Oct 2020
|
Valid until 27 Oct 2020
|
Remark:
Evening work was scheduled on 7- 9 and 25 - 30 May 2020 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-RE1021-19
|
23 Dec
2019
|
1 Jun 2020
|
Valid
until 1 Jun 2020
|
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)
|
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
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)
|
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 Designated
and interim alternative location for air
quality and noise monitoring in the Reporting Period
|
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.
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: 2X6145)
|
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
|
B&K
2238 (S/N: 2285762), Rion NL-52 ( S/N:00464681)
|
|
Calibrator
|
Rion
NC-74 (S/N:34657231)
|
|
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
|
|
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-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
In the Reporting Period, 1-Hour TSP and 24-Hr TSP of air
quality monitoring were respectively performed at interim alternative monitoring locations AM4 and AM5.
The air quality monitoring schedule is presented in Appendix F.
4.1.2
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, 18 sessions of 1-hour TSP and 5 sessions of 24-hours TSP monitoring were carried out and the monitoring
results are summarized in Table 4-1. 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 and 24-Hour TSP Air Quality
Impact Monitoring Results
|
AM5
|
AM4
|
|
24-Hr TSP (mg/m3)
|
1-Hour TSP (mg/m3)
|
|
Date
|
Meas. Result
|
Date
|
Start Time
|
1st Meas.
|
2nd Meas.
|
3rd Meas.
|
|
5-May-20
|
94
|
2-May-20
|
10:38
|
88
|
86
|
84
|
|
11-May-20
|
95
|
6-May-20
|
10:30
|
85
|
77
|
74
|
|
16-May-20
|
115
|
12-May-20
|
14:23
|
103
|
110
|
120
|
|
22-May-20
|
100
|
18-May-20
|
9:17
|
84
|
67
|
62
|
|
28-May-20
|
60
|
23-May-20
|
9:45
|
67
|
71
|
65
|
|
--
|
--
|
29-May-20
|
10:10
|
75
|
69
|
67
|
|
Average
(Range)
|
93
(60
– 115)
|
Average
(Range)
|
81
(62
– 120)
|
4.2.2
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.
4.2.3
The meteorological data during impact monitoring period is summarized in Appendix J.
5.1.1
In the Reporting Period, construction noise quality monitoring
was performed at designated monitoring location CNMS-1 and interim alternative monitoring
location CNMS-5. The construction noise monitoring schedule is presented in Appendix F.
5.1.2
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
8 sessions of daytime construction noise monitoring were performed at both the designated
monitoring location CNMS-1 and the interim alternative location CNMS-5 in the reporting period.
The daytime noise monitoring results are summarized in Table
5-1 and Table 5-2. 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
|
|
6-May-20
|
11:21
|
69.4
|
NA
|
|
12-May-20
|
15:11
|
68.4
|
NA
|
|
18-May-20
|
10:10
|
70.0
|
NA
|
|
29-May-20
|
11:20
|
66.4
|
NA
|
Table 5-2 Daytime
Construction Noise Impact Monitoring Results at CNMS-5
|
Date
|
Time
|
Measurement Result (dB(A))
|
|
Leq30min
|
Façade Correction
|
|
6-May-20
|
10:30
|
65.8
|
NA
|
|
12-May-20
|
14:25
|
66.8
|
NA
|
|
18-May-20
|
9:17
|
68.9
|
NA
|
|
29-May-20
|
10:15
|
69.0
|
NA
|
5.2.2
As shown in
Table
5-1 and Table 5-2, 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
One (1) complaint related to
construction noise was received in the reporting period, therefore one (1)
Action Level exceedances was registered. The details of the complaint was presented
in Section
10.
5.2.4
In the reporting period, evening marine
work was scheduled by Contractor of Contract 1 at Portion II from 4 - 9 and 25
- 30 May 2020. 4 session of weekly evening construction
noise monitoring were performed at both the designated monitoring
location CNMS-1 and the interim alternative location CNMS-5 in the reporting period. The evening noise monitoring results at interim alternative
location is summarized in Table 5-3 and Table 5-4. The detailed noise monitoring data are
presented in Appendix
H.
Table 5-3 Evening
Construction Noise Impact Monitoring Results at CNMS-1
|
Date
|
Start Time
|
1st Leq (5min)
|
2nd Leq (5min)
|
3rd Leq (5min)
|
|
Leq, dB(A)
|
Leq, dB(A)
|
Leq, dB(A)
|
|
7-May-20
|
19:41
|
51.4
|
50.9
|
51.0
|
|
28-May-20
|
19:37
|
57.8
|
58.0
|
57.4
|
Table 5-4 Evening
Construction Noise Impact Monitoring Results at CNMS-5
|
Date
|
Start Time
|
1st Leq (5min)
|
2nd Leq (5min)
|
3rd Leq (5min)
|
|
Leq, dB(A)
|
Leq, dB(A)
|
Leq, dB(A)
|
|
7-May-20
|
19:10
|
61.2
|
60.3
|
60.5
|
|
28-May-20
|
19:05
|
62.5
|
60.1
|
60.6
|
5.2.5
According to Table 5-3 and Table 5-4,
three (3) sessions of evening noise monitoring results triggered the Limit
Level (55 dB(A)) in the reporting period and investigations were undertaken by
ET accordingly.
5.2.6
For the evening noise monitoring
exceedances recorded at CNMS-1 on 28 May 2020 and at CNMS-5 on 7 & 28 May
2020, since the marine work at Junk Bay were ceased before the evening noise
monitoring event, it was considered the exceedances recorded were unlikely due
to the Project.
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)
|
0.132
|
-
|
2.256
|
-
|
|
Reused
in this Contract (Inert) (‘000m3)
|
0
|
-
|
0
|
-
|
|
Reused
in other Projects (Inert) (‘000m3)
|
0
|
-
|
0
|
-
|
|
Disposal
as Public Fill (Inert) (‘000m3)
|
0.132
|
TKO 137
|
2.256
|
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
|
-
|
|
Recycled Paper / Cardboard Packing (‘000kg)
|
0.092
|
Collected by paper recycling company
|
0
|
-
|
|
Recycled Plastic (‘000kg)
|
0
|
-
|
0
|
-
|
|
Chemical Wastes (‘000kg)
|
0
|
-
|
0
|
-
|
|
General Refuses (‘000m3)
|
0.117
|
NENT
|
0.052
|
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 6, 13, 21 & 27 May 2020. Moreover, the Independent Environmental Checker (IEC) monthly site
inspection was conducted on 13 May 2020.
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
|
|
6 May 2020
|
•
No adverse environmental issue was observed.
|
•
NA
|
|
13 May 2020
|
Observation:
•
Small amount of oil spillage from the plant was observed. Oil and water
mixture cumulated inside the drip tray and the top soil nearby contaminated
by oily water should be cleaned and disposed as chemical waste. (Works Area
A)
|
•
The top soil
nearby contaminated by oily water was cleaned and disposed as chemical waste.
|
|
21 May 2020
|
•
No adverse environmental issue was observed.
|
•
NA
|
|
27 May 2020
|
•
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 6, 13, 21 & 27 May 2020. Moreover, the Independent Environmental Checker (IEC) monthly site
inspection was conducted on 13 May 2020.
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
|
|
6 May 2020
|
Observation:
•
The Contractor should check the specification of the excavator and
display the NRMM label for the excavator if required. (Portion IV)
|
•
The NRMM label
has been provided for excavator.
|
|
13 May 2020
|
•
No adverse environmental issue was observed.
|
•
NA
|
|
21 May 2020
|
Observation:
•
Small amount of oil stain on the ground should be cleaned. (Portion VI-
Wan O Road)
|
•
The oil
absorption mat has been provided on ground to prevent the oil leakage.
|
|
27 May 2020
|
Observation:
•
Proper NEL should be displayed for hand-held breaker using on-site.
(Portion VI)
|
•
The hand held
breaker has been removed from site.
|
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 Temporary
trench had been installed at the sea front to prevent muddy run-off overflow
into the water body.
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.
Ÿ Gap
between the concrete block and the sea front was sealed up.
Ÿ Trench
had been installed beside the sea front to prevent muddy surface run-off
overflow during rainstorm.
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 25 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)
|
0.1%
|
0.1%
|
|
Oxygen
|
<19%
|
<18%
|
20.8%
|
21.0%
|
|
Carbon Dioxide
|
>0.5%
|
>1.5%
|
0.1%
|
0.2%
|
9.3.3
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.
10.1.1
In the Reporting Period, one (1) environmental complaint was
received with respect to construction dust, evening construction noise and
wastewater 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 5 May 2020
10.1.2
A
complaint was received by CEDD on 5 May 2020 afternoon regarding several
environmental issue including construction dust, noise nuisance from evening
construction work and wastewater generated from site. The complainant did not
specify the complaint location.
10.1.3
During
the regular joint site inspection among the Supervisor, the Contractor and ET
carried out in the past few weeks, it was observed that construction dust and
wastewater mitigation measures were implemented properly in both Contracts of
the Project and no environmental non-compliance was found.
10.1.4
In
addition, according to the evening noise monitoring conducted in the past
month, the evening noise measurement results were found within the range of the
baseline noise monitoring results which implies that the construction noise
from evening works was insignificant. The complaint
was considered not related to the Project.
10.1.5
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 – 31 May 2020
|
1
|
1
|
5
|
Construction
Dust, Noise and Wastewater
|
|
1 – 31 May 2020
|
2
|
0
|
3
|
NA
|
Table
10-2 Statistical Summary of
Environmental Summons
|
Reporting Period
|
Contract
|
Environmental Summons Statistics
|
|
Frequency
|
Cumulative
|
Summons Nature
|
|
1 – 31 May 2020
|
1
|
0
|
0
|
NA
|
|
1 – 31 May 2020
|
2
|
0
|
0
|
NA
|
Table 10-3 Statistical Summary of
Environmental Prosecution
|
Reporting Period
|
Contract
|
Environmental Prosecution Statistics
|
|
Frequency
|
Cumulative
|
Prosecution Nature
|
|
1 – 31 May 2020
|
1
|
0
|
0
|
NA
|
|
1 – 31 May 2020
|
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 June
2020 should be included:-
Contract
1
Ÿ Installation
of pre-cast shell at Portion II
Ÿ Pile
Cap Construction at Portion II
Ÿ Construction
of Cast-in situ pier E1 at Portion II
Ÿ Installation
of Precast V-pier at Portion II
Ÿ 2nd
Stage Pile Cap Casting (Connecting between pile cap and V-Pier) at Portion II
Ÿ Installation
of Bearing and Precast Deck at Portion II
Contract
2
Ÿ Pre-bored
Socket H-Pile (Portion VI)
Ÿ Excavation
(Portion III,VI)
Ÿ Sheet
Pilling (Portion 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 Trimming
Bored pile head (Portion VI)
Ÿ
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 will be properly implemented and maintained as per the
Mitigation Implementation Schedule in Appendix L
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 31st May 2020.
12.1.2
In the Reporting Period, one (1) evening construction noise action level exceedance was
recorded and three (3) session
of evening construction noise monitoring results triggered the Limit Level.
Investigation was undertaken by ET and it was considered that the evening
construction noise limit level exceedances recorded
are unlikely caused by the Project.
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, one (1) environmental complaint were received with respect to the construction
dust, evening construction noise and wastewater arising from the Project. Investigations for the complaint by site
investigation were undertaken by ET and it is considered the complaint is not
related to the Project.
12.1.5
No
notification of summons or prosecution were received and recorded for the Project.
12.2.1
Due to wet season has begun in Hong Kong, 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 was 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.
