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
6.2 Results
of Water quality Monitoring 20
7. Waste
Management 24
7.1 General
Waste Management 24
7.2 Records
of Waste Quantities 24
8. Site
Inspection 25
8.1 Requirements 25
8.2 Findings
/ Deficiencies During the Reporting Month 25
9. Landfill
Gas Monitoring 27
9.1 General
Requirement 27
9.2 Limit
Levels and Event and Action Plan 27
9.3 Landfill
Gas Monitoring 27
10. Environmental
Complaint and Non-Compliance 28
10.1 Environmental
Complaint, Summons and Prosecution 28
11. Implementation
Status of Mitigation Measures 29
11.1 General
Requirements 29
11.2 Tentative
Construction Activities in the Coming Month 29
11.3 Impact
Forecast 30
12. Conclusions
and Recommendations 31
12.1 Conclusions 31
12.2 Recommendations 31
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 Interim
alternative location for air quality and noise monitoring
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 Construction
Noise Impact Monitoring results
Table
6-1 Result
Summary of Depth Average (Surface & Middle Layer) of DO (mg/L)
Table
6-2 Result
Summary of Bottom Depth of DO (mg/L)
Table
6-3 Result
Summary of Depth Average of Turbidity (NTU)
Table
6-4 Result
Summary of Depth Average of Suspended Solid (mg/L)
Table
6-5 Summary
of Water Quality Exceedance
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
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 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 4th
Monthly EM&A report presenting the monitoring results and inspection
findings for the reporting period from 1st to 31st
March 2019 (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 Pre-drilling works at Portion II
Ÿ Piling works at Portion II
Contract 2 (Contract
No. NE/2017/08)
2.2.3
The major construction activities of Contract 2 undertaken in this
Reporting Period are:-
Ÿ UU Detection Work at Portion VI
Ÿ Trial Pit and Pre-drill Work at Portion III & 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 August 2018
|
N/A
|
--
|
|
3
|
Water
Pollution Control Ordinance - Discharge
License
|
WT00032842-2018
|
1 Mar 2019
|
31 Mar 2024
|
Valid until 31 March 2024
|
|
In progress
(Ref:438585)
|
--
|
--
|
Application submitted on 23 October
2018
|
|
4
|
Billing
Account for Disposal of Construction Waste
|
7031412
|
24 July 2018
|
N/A
|
--
|
|
Billing
Account for Disposal of Construction Waste
(through
Vessel delivering)
|
7032666
|
10 January 2019
|
10 April 2019
|
Valid until 10 April 2019
|
|
5
|
Marine
Dumping Permit
|
In progress
(Ref:439218)
|
--
|
--
|
Application submitted on 9 November 2018
|
|
6
|
Construction Noise Permit
|
GW-RE0052-19
|
26 January 2019
|
25 March 2019
|
Valid until 25 March 2019
|
|
GW-RE0212-19
|
26 March 2019
|
24 May 2019
|
Valid until 24 May 2019
|
Remark: Evening marine work at Portion II for Contract
1 was carried out on 11 – 16, 18 - 23 and 26 - 30 Mar 2019
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
November 2018
|
N/A
|
--
|
|
3
|
Water Pollution Control Ordinance
- Discharge License
|
In
progress
|
--
|
--
|
Application
submitted on 20 December 2018
|
|
4
|
Billing Account for Disposal of
Construction Waste
|
7032702
|
8 November
2018
|
N/A
|
--
|
|
5
|
Construction
Noise Permit
|
GW-RE0905-18
|
10 December2018
|
27 March
2019
|
Valid
until 27 March 2019
|
|
GW-RE0174-19
|
20 March
2019
|
19 June
2019
|
Valid
until 19 June 2019
|
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 5) (Southeast facade)
|
Under
Construction
|
|
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 agreed alternative monitoring location for impact air quality and noise monitoring are
summarized in Table 3-4 and illustrated in Appendix D.
Table 3-4 Interim alternative location
for air quality and noise monitoring
|
Location ID
|
Monitoring Parameter
|
Location
|
|
AM4
|
1-Hour TSP Air
Quality
|
Podium of Lohas Park Phase 2A (Le Prestige)
|
|
AM5
|
24-Hour TSP Air
Quality
|
Boundary of Site Office near Junction of Wan Po Road and Wan O Road
|
|
CNMS-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: 438320)
|
|
1- hour TSP
|
Portable Dust Meter
|
Laser Dust Monitor Sibata LD-3B Laser Dust Monitor (S/N: 3Y6503)
|
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-31 (S/N: 00410221)
|
|
Calibrator
|
Rion NC-74 (S/N: 34657230)
|
|
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
(S/N:
15H102620/15H103928)
|
|
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
