1.
INTRODUCTION
1.1
Background
1.2
Purpose of this Manual
1.3
Environmental Monitoring and Audit
Requirements
1.4
Project Organization
1.5
Construction Programme
2.
AIR QUALITY
2.1
Air Quality Monitoring Parameters
2.2
Monitoring Equipment
2.3
Laboratory Measurement/Analysis
2.4
Monitoring Locations
2.5
Baseline Monitoring
2.6
Impact Monitoring
2.7
Event and Action Plan for Air Quality
2.8
Mitigation Measures for Construction Dust
3.
NOISE
3.1
Noise Monitoring Parameters
3.2
Monitoring Equipment
3.3
Monitoring Locations for Airborne
Construction Noise
3.4
Baseline Monitoring
3.5
Impact Monitoring
3.6
Event and Action Plan for Construction
Noise
3.7
Residual Impact
3.8
Mitigation Measures for Construction Noise
3.9
Ground Borne Construction Noise Monitoring
3.10 Monitoring
Locations for Groundborne Construction Noise
4.1
Water Quality Parameters
4.2
Monitoring Equipment
4.3
Monitoring Locations
4.4
Baseline Monitoring
4.5
Impact Monitoring
4.6
Event and Action Plan for Water Quality
4.7
Mitigation measures for Water Quality
5.1
General
5.2
Mitigation Measures for Waste Management
6.1
General
6.2
Mitigation Measures for Terrestrial Ecology
6.3
Mitigation Measures for Marine Ecology
7.
FISHERIES
7.1
General
7.2
Mitigation Measures
8.
LANDSCAPE AND VISUAL IMPACTS
8.1
General
8.2
Mitigation Measures for Landscape and
Visual during Construction
8.3
Mitigation Measures for Landscape and
Visual during Operation
9.1
General
9.2
Mitigation Measures for Cultural Heritage
10.1 Site
Inspections/Audits
10.2 Compliance
with Legal and Contractual Requirements
10.3 Environmental
Complaints
11.
REPORTING
11.1 General
11.2 Baseline
Monitoring Report
11.3 Monthly
EM&A Reports
11.4 Quarterly
EM&A Summary Reports
11.5 Final
EM&A Summary Report
11.6 Data
Keeping
11.7 Interim
Notifications of Environmental Quality Limit Exceedances
11.8 Electronic
Reporting of EM&A Information
lIST OF TABLES
Table
2.1 Locations for
Air Quality Monitoring Stations
Table
2.2 Action and
Limit Levels for Air Quality
Table
2.3 Event/Action
Plan for Air Quality
Table
3.1 Locations for
Airborne Construction Noise Monitoring Stations
Table
3.2 Action and
Limit Levels for Airborne Construction Noise
Table
3.3 Event/Action
Plan for Airborne Construction Noise
Table
3.4 Locations for
Groundborne Construction Noise Monitoring Stations
Table
3.5 Construction
Ground Borne Noise Standards
Table
3.6a TBM Working Hours -
Sensitive Receiver (Domestic Premise)
Table
3.6b TBM
Working Hours - Sensitive Receiver (Education Institution)
Table
4.1 Water Quality
Parameters
Table
4.2 Methods for
Laboratory Analysis for Water Samples
Table
4.3 Action /Limit
Levels for Water Quality
Table
4.4 Event and
Action Plan for Water Quality
Table
5.1a Estimated Spoil
Generated Breakdown from Eastern Portal for 24 hours TBM operation regime
Table
5.1b Estimated Spoil
Generated Breakdown from Western Portal for 24 hours TBM operation regime
lIST OF FIGUREs
Figure
1.1 Tunnel Layout
Plan and Intake Shaft Locations
Figure
1.2 Project
Organization Chart
Figure
2.1 Locations of
Monitoring Stations
Figure
2.2 Locations of
Monitoring Stations
Figures
3.1 Locations of
Construction Noise Monitoring Stations
Figures
3.2 Locations
of Construction Noise Monitoring Stations
Figures
3.3 Locations
of Construction Noise Monitoring Stations
Figures
3.4 Locations
of Construction Noise Monitoring Stations
Figures
3.5 Locations
of Construction Noise Monitoring Stations
Figures
3.6 Locations
of Construction Noise Monitoring Stations
Figures
3.7 Locations
of Construction Noise Monitoring Stations
Figures
3.8 Locations
of Construction Noise Monitoring Stations
Figures
3.9 Locations
of Construction Noise Monitoring Stations
Figures
3.10 Locations
of Construction Noise Monitoring Stations
Figures
3.11 Locations
of Construction Noise Monitoring Stations
Figures
3.12 Locations
of Construction Noise Monitoring Stations
Figures
3.13 Locations
of Construction Noise Monitoring Stations
Figures
3.14 Locations
of Construction Noise Monitoring Stations
Figures
3.15 Locations
of Construction Noise Monitoring Stations
Figures
3.16 Locations
of Construction Noise Monitoring Stations
Figures
3.17 Locations
of Construction Noise Monitoring Stations
Figures
3.18 Locations
of Construction Noise Monitoring Stations
Figure
4.1 Locations of
Water Quality Monitoring Stations
Figure
10.1 Flow
Chart of the Complaint Response Procedures
lIST OF APPENDIces
A
Environmental Mitigation Implementation Schedule
B
Sample
Air Quality Monitoring Field Data Sheet
C
Sample
Construction Noise Monitoring Field Data Sheet
D
Sample
of the Interim Notifications of Exceedances
F
Tentative
Construction Programme
1.1.1
Surface
water falling within the northern catchments of Hong Kong Island is intercepted
by a series of existing drainage pipes and culverts running through the urban
area that ultimately discharge at several locations into Victoria Harbour. The
existing system is overloaded and flooding and hazardous overland water flows can
occur in extreme conditions. However, much of the catchment[1] is outside the urban area and the
objective of the drainage improvement scheme studied here is to intercept
surface water before it enters the urban area and direct it to a discharge
outlet
on the west-side of Hong Kong Island. This will reduce the flows entering into lower catchment and reduce flooding
frequency in the urban area.
1.1.2
The
study under Agreement No. CE91/95 identified a tunnel alignment to intercept
flows and direct them to the tunnel. Due to the proximity of the tunnel
alignment to Country Parks it was determined that the project would be
classified as a Designated Project (DP) falling under the requirements of the Environmental Impact Assessment Ordinance (EIAO). It has included the Environmental Impact
Assessment (EIA) Study.
1.1.3
Black
& Veatch Hong Kong Ltd. (B&V) was commissioned by the Drainage Services
Department (DSD) in October 2002 under Agreement No. CE 25/2002 (DS) to
undertake the Drainage Improvement in Northern Hong Kong Island - Hong Kong
West and Lower Catchment Improvement - Investigation Study. The investigation
includes a review of the extent and alignments of the drainage tunnels together
with its associated drainage structures (e.g. the intake shafts and connecting adits
between the shafts and tunnels). An Environmental Impact Assessment (EIA) Study
has been undertaken to provide information on the nature and extent of
environmental impacts arising from the construction and operation of the
proposed DP project and related activities.
From the EIA, the recommendations for monitoring contained herein, are
made. Figure 1.1 shows the layout of the Project.
1.1.4
The
proposed tunnel starts from a tunnel portal close to the site of the Haw Par
Mansion in Tai Hang and follows a sinuous route beneath urban areas in Jardines
Lookout and Mid Levels. A discharge portal at the west end of Hong Kong Island
at Pokfulam, north of the Cyberport site is proposed. The tunnel is designed to convey the intercepted
flood flows for a 200-year storm event occurring across the complete
catchment. The internal diameter of the
initial section of the tunnel, before the Aberdeen Vehicular Tunnel, is 6.25m,
while the remaining tunnel section has an internal diameter of 7.25m. Thirty five intake locations have been
identified within the project areas that are suitable for intercepting flood
flows. The intakes structures are interconnected with the main tunnel by
connecting adits which are 2.3m in diameter.
Figure 1.1 shows the alignment of the proposed tunnel, adits and the
locations of the intake structures.
1.2.1
The
purpose of this Environmental Monitoring and Audit (EM&A) Manual is to
guide the setup of
an EM&A programme to ensure compliance with the recommendations in the EIA study, to assess the effectiveness of the
recommended mitigation measures and to identify any further need for additional
mitigation measures or remedial action.
1.2.2
This
Manual outlines the monitoring and audit programme to be undertaken for the
construction and operational phases of the proposed DP. It aims to provide
systematic procedures for monitoring, auditing and minimising of the
environmental impacts associated with the project.
1.2.3
Hong
Kong environmental regulations for noise, air quality, water quality and waste,
the Hong Kong Planning Standards and
Guidelines (HKPSG), and recommendations in the EIA Report have served as environmental
standards and guidelines in the preparation of this Manual.
1.2.4
For
the purpose of this Manual, the "Engineer" should refer to the
Engineer as defined in the Contract and the Engineer's Representative (ER), in
cases where the Engineer's powers have been delegated to the ER, in accordance
with the Contract. The Environmental Team (ET) leader, who should be responsible for and in
charge of the ET, should refer to the person delegated
the role of executing the environmental monitoring and audit requirements.
1.2.5
This
Manual contains the following:
·
Duties
of the ET with respect to the environmental monitoring and audit requirements
during construction;
·
Duties
of the Independent Environmental Checker (IEC) with respect to the
environmental monitoring and audit requirements during construction;
·
Information
on project organisation and programming of construction activities for the project;
·
Requirements
with respect to the construction schedule and the necessary environmental
monitoring and audit programme to track the varying environmental impacts;
·
Definition
of Action and Limit Levels;
·
Establishment
of event and action plans;
·
Requirements
of reviewing pollution sources and working procedures required in the event of
non-compliance of the environmental criteria; and
·
Requirements
of presentation of environmental monitoring and audit data and appropriate
reporting procedures.
1.3
Environmental Monitoring and Audit
Requirements
1.3.1
The
construction and operation phase impacts of the DP have been assessed and
presented in the EIA Report. The EIA Report has specified the recommended
environmental mitigation measures to minimise the potential adverse
environmental impacts identified. An implementation schedule of the recommended
environmental mitigation measures is prepared as part of the EIA study and is contained in Appendix A of this
Manual.
1.3.2
In
order to ensure that the mitigation measures recommended in EIA Report are
fully implemented and resulted in the expected effectiveness, this Manual
defines the scope of EM&A requirements for the construction and operation
of the DP to achieve satisfactory environmental performance. The EM&A
requirements are prepared in accordance with the requirements stipulated in Annex 21 of the Technical Memorandum
on Environmental Impact Assessment
Process (EIA-TM).
The environmental monitoring to be undertaken for the DP are as
follows:-
·
Baseline Monitoring refers to the measurement of prevailing
environmental parameters, including existing air quality and noise level, to
determine the nature and ranges of natural variation and to establish, where
appropriate, the nature of change. This
information is useful for assessing the short and long term environmental
impacts of the Project activities.
·
Impact Monitoring involves the measurement of environmental
parameters during the Project activities in order to determine the impacts of
the activities and the effectiveness of the proposed mitigation measures, and
any further remedial measures which are needed.
·
Compliance Monitoring involves periodic sampling and/or
continuous measurement of environmental parameters and the determination of
their compliance with regulatory requirements and standards.
1.3.3
The
environmental monitoring programme shall also be subject to environmental
audit. The aim is to determine whether
satisfactory compliance with the legislative requirements has been met, and to
ensure that no annoyance is caused to sensitive receivers or else the remedial
action plan will be initiated, if required.
This will require information on the standards for parameters of concern
and monitoring data. Each audit will
consist of a review of the monitoring data and comparison with the relevant
legislative requirements and environmental performance standards specified in
the Contract Document.
1.3.4
In
order to ensure that the mitigation measures recommended in the EIA study are implemented fully and resulted in the
expected effectiveness, this Manual defines the scope of EM&A requirements
for the construction of the proposed DP to achieve satisfactory environmental
performance. The EM&A requirements
for the DP shall be as follows:-
·
Pre-Construction
Phase – including all baseline monitoring prior to any
project activity occurring on site.
·
Construction
Phase – including impact/compliance monitoring and audit during all
construction activities.
·
Operation
Phase – including ground water level monitoring and audit at selected intakes/drop
shafts locations.
1.4
Project
Organization
1.4.1
The
proposed EM&A organization is shown in Figure 1.2 of this Manual. The
responsibilities of respective parties for the EM&A programme during the
pre-construction and construction are listed in forthcoming Clauses.
Environmental
Team
1.4.2
The ET
Leader and the ET should not be in any way an
associated body of the Contractor. The ET should be led and managed by the ET Leader. The ET Leader shall be the person who has at least
7 years' experience in EM&A or environmental management.
1.4.3
Suitably
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, to enable fulfillment of the project's EM&A requirements as
specified in the EM&A Manual during construction. The project proponent should be responsible
for the EM&A requirements as specified in this EM&A manual during
operation phase of the proposed project.
1.4.4
The ET
Leader and the ET are employed to implement the EM&A programme and ensure the
Contractor's compliance with the project's environmental performance
requirements during construction. The duties are:
(a) sampling, analysis and statistical evaluation of
monitoring parameters as required in the EM&A Manual;
(b) carry out environmental site surveillance;
(c) audit of compliance with environmental protection,
and pollution prevention and control regulations;
(d) monitor the implementation of environmental
mitigation measures;
(e) monitor the compliance with Conditions in the
relevant Environmental Permit (EP) and compliance with Specifications in the
Contract;
(f) review the construction programme and comment as
necessary;
(g) review the construction methodology and comment as
necessary;
preparation and updating of EM&A works schedule with reference to the best
available detailed construction programme;
(h) investigation of non-compliant events, evaluation
and identification of corrective measures;
(i) liaison with IEC on all environmental performance
matters, and timely submission of all relevant EM&A proforma for the
approval by IEC;
(j) advice to the Contractor on environment improvement,
awareness, enhancement matters, etc., on site and
(k) timely submission of the EM&A report to the project
proponent and the DEP.
1.4.5
Site
inspections should be carried out by the ET at least once per week during
construction. Ad hoc site inspections should also be carried out if significant
environmental problems are identified.
Independent
Environmental Checker
1.4.6
The
IEC should advise the ER on environmental issues related to the project. The
role of the IEC should be independent from the management of construction
works, but the IEC should be empowered to audit the environmental performance
of construction.
1.4.7
The
IEC should be employed prior to commencement of construction of the project.
The IEC should have at least 7 years experience in EM&A or environmental
management. The appointment of the IEC is subject to the approval of the
Engineer.
1.4.8
The
IEC should audit the overall EM&A programme including the implementation of
all environmental mitigation measures, submissions relating to EM&A, and
any other submission required under this Manual. In addition, the IEC should be responsible
for verifying the environmental acceptability of permanent and temporary works,
and relevant design plans and submissions under this Manual.
1.4.9
The
IEC should arrange and conduct at least monthly general site inspections of the
project during the construction periods. Ad hoc site inspection should also be
carried out if significant environmental problems are identified.
1.4.10
The
IEC should ensure the impact monitoring is conducted according to the
prescribed schedule at the correct locations.
1.4.11
The
IEC should report the findings of the site inspections and other environmental
performance reviews to DSD and Engineer/ER.
1.4.12
Appropriate
resources should also be allocated under the Contract for the IEC to fulfill their duties specified in this
Manual.
1.4.13
The
main duty of the IEC is to carry out environmental audit of the construction of
the project; this should include, inter alias, the followings:
(a) review and audit all aspects of the EM&A
programme;
(b) advise on proactive actions;
(c) validate and confirm the accuracy of monitoring
results, monitoring equipment, monitoring locations, monitoring procedures and
locations of sensitive receivers;
(d) carry out random sample check and audit on
monitoring data and sampling procedures, etc.;
(e) conduct random site inspection;
(f) audit the recommendations and requirements in EIA
Report against the status of implementation of environmental protection
measures on site;
(g) review the effectiveness of environmental mitigation
measures and project environmental performance;
(h) on a needs basis, audit the Contractor's
construction methodology and agree the least impact alternative in consultation
with the ET Leader and the Contractor;
(i) investigate complaint cases and check the
effectiveness of corrective measures;
(j) review accuracy of environmental monitoring section
of EM&A reports;
(k) verify EM&A report submitted by the ET Leader;
(l) feedback audit results to ET by signing off relevant
EM&A proformas.
Contractors
1.4.14
The
term "Contractors" should be taken to mean all construction
contractors and sub-contractors, working on site at any one time. Besides
reporting to the Engineer, the Contractors should:
(a) provide assistance to ET in carrying out monitoring;
(b) work within the scope of the relevant contract
and conditions;
(c) participate in the site inspections undertaken by
the ET, as required, and undertake any correction actions instructed by the
Engineer;
(d) provide information/advice to the ET regarding works
activities which may contribute, or be continuing to the generation of adverse
environmental conditions;
(e) implement measures to reduce impact whenever Action
and Limit Levels are exceeded;
(f) take responsibility and strictly adhere to the
guidelines of the EM&A programme and complementary protocols developed by
their project staff; and
(g) adhere to the procedures for carrying out complaint
investigation in accordance with EM&A manual
Engineer or Engineer's Representative (ER)
1.4.15
The
term Engineer, or Engineer's Representative, refers to the organization
responsible for overseeing the construction works of the project and
'monitoring' the works undertaken by the various Contractors, and for ensuring
that they are undertaken by the Contractors in accordance with the
specification and contractual requirements. The ER should:
(a) monitor the Contractors' compliance with contract
specifications, including the implementation and operation of environmental
mitigation measures and ensure their effectiveness, and other aspects of the
EM&A programme;
(b) inform the Contractor when action is required to
reduce impacts in accordance with the
Event and Action Plan;
(c) provide assistance to the ET as necessary in the
implementation of the environmental monitoring and auditing programme;
(d) adhere to the procedures for carrying out complaint
investigation in accordance with EM&A manual; and
(e) instruct the Contractors to follow the agreed
protocols or those in the Contract Specifications in the event of exceedances
of Action and Limit levels;
1.5.1
The
major construction activities of the Project are tunneling works,
drilling & blasting works, excavation and concreting works for the intakes
structure, stilling basins and tunnel portals.
1.5.2
During
the operation stage, the major site activities are the maintenance work of
the main drainage tunnel, adits, intake structures and the ancillary
facilities.
1.5.3
The
construction of the Project is scheduled for commencement in mid 2007 for completion in end 2011. A tentative construction programme is
provided in Appendix F. The ET and IEC
shall make reference to the Contractor’s actual works progress and works
programme during the construction stage to schedule the EM&A works, and the
Contractor shall provide the respective information to the ET Leader and the
IEC for formulating the EM&A schedule.
2.1
Air
Quality Monitoring Parameters
2.1.1
The
construction of the Project is scheduled for commencement in mid 2007 for completion in end 2011. A tentative construction programme is provided
in Appendix F. The ET and IEC shall make
reference to the Contractor’s actual works progress and works programme during
the construction stage to schedule the EM&A works, and the Contractor shall
provide the respective information to the ET Leader and the IEC for formulating
the EM&A schedule.
2.1.2
Monitoring
and audit of the Total Suspended
Particulates (
2.1.3
1-hour
and 24-hour
2.1.4
All
relevant data including temperature, pressure, weather conditions, elapsed-time
meter reading for the start and stop of the sampler, identification and weight
of the filter paper, and other special phenomena and work progress of the
concerned site etc. shall be recorded down in details. A sample field log sheet is shown in Appendix
B to this Manual.
2.2.1
High
Volume Sampler (HVS) in compliance with the following specifications shall be
used for carrying out the 1-hour and 24-hour
·
0.6-1.7m3/min
(20-60 SCFM) adjustable flow range;
·
equipped
with a timing/control device with +/- 5 minutes accuracy for 24 hours
operation;
·
installed
with elapsed-time meter with +/- 2 minutes accuracy for 24 hours operation;
·
capable
of providing a minimum exposed area of 406 cm2 (63in2);
·
flow
control accuracy: +/- 2.5% deviation over 24-hour sampling period;
·
equipped
with a shelter to protect the filter and sampler;
·
incorporated
with an electronic mass flow rate controller or other equivalent devices;
·
equipped
with a flow recorder for continuous monitoring;
·
provided
with a peaked roof inlet;
·
incorporated
with a manometer;
·
able
to hold and seal the filter paper to the sampler housing at horizontal
position;
·
easy
to change the filter; and
·
capable of operating continuously for 24-hour
period.
2.2.2
The ET
Leader shall be responsible for provision of the monitoring equipment and
associated accessories and power supply.
He shall ensure that sufficient numbers of HVSs with an appropriate
calibration kit are available for carrying out the regular impact monitoring
and ad hoc monitoring. The HVSs shall be
equipped with an electronic mass flow controller and be calibrated against a
traceable standard at regular intervals.
All the equipment, calibration kit, filter papers, etc. shall be clearly
labeled. The ET Leader shall also liaise
with the concerned parties for gaining access to the monitoring stations for
the installation of the monitoring equipment and carrying out monitoring.
2.2.3
Initial
calibration of dust monitoring equipment shall be conducted upon installation
and thereafter at bi-monthly intervals.
The transfer standard shall be traceable to the internationally
recognized primary standard and be calibrated annually. The calibration data shall be properly
documented for future reference by the
concerned parties such as IEC.
All the data should be converted into standard temperature and pressure
condition.
2.2.4
The
flow-rate of the sampler before and after the sampling exercise with the filter
in position shall be verified to be constant and be recorded in the field log
sheet mentioned in Section 2.3.
2.2.5
If the
ET Leader proposes to use a direct reading dust meter to
measure 1-hour
2.2.6
Wind
data monitoring equipment shall also be provided and set up at conspicuous
locations for logging wind speed and wind direction near to the dust monitoring
locations. The equipment installation
location shall be proposed by the ET Leader and agreed with the ER in consultation
with the IEC. For installation and operation of wind data
monitoring equipment, the following points shall be observed:-
·
the wind sensors should be installed on
masts at an elevated level 10m above ground so that they are clear of
obstructions of turbulence caused by the buildings;
·
the wind data should be captured by a data
logger and to be downloaded for processing at least once a month;
·
the wind data monitoring equipment should be
re-calibrated at least once every six months; and
·
wind direction should be divided into 16
sectors of 22.5 degrees each.
2.2.7
In
exceptional situations, the ET Leader may propose alternative methods to obtain
representative wind data. The
alternative methods shall be agreed by ER in consultation with the IEC.
2.3
Laboratory
Measurement/Analysis
2.3.1
The ET
Leader shall carry out laboratory measurements/analyses for the dust samples
collected.
2.3.2
A
clean laboratory with constant temperature and humidity control, and equipped
with necessary measuring and conditioning instruments, to handle the dust
samples collected, shall be available for sample analysis, and equipment
calibration and maintenance. The
laboratory shall be Hong Kong Laboratory
Accreditation Scheme (HOKLAS) accredited.
2.3.3
If a
site laboratory is set up or a non-HOKLAS accredited laboratory is hired for
carrying out the laboratory analysis, the laboratory equipment shall be
approved by the ER and the measurement procedures shall be witnessed by the
ER. The ET Leader shall provide the ER
with one copy of the Title 40 of the Code
of Federal Regulations, Chapter 1 (Part 50), Appendix B for his
reference.
2.3.4
Filter
paper of size 8”´10” shall be labeled before sampling. It shall be a clean filter paper with no pin
holes, and shall be conditioned in a humidity controlled chamber for over
24-hour and be pre-weighed before use for the sampling.
2.3.5
After
sampling, the filter paper loaded with dust shall be kept in a clean and
tightly sealed plastic bag. The filter
paper is then returned to the laboratory for reconditioning in the humidity
controlled chamber followed by accurate weighing by an electronic balance with a readout
down to 0.1 mg. The balance shall be regularly calibrated against a traceable
standard.
2.3.6
All
the collected samples shall be kept in a good condition for 6 months before
disposal.
2.4.1
Two
designated monitoring stations, AQ1 and AQ2 are selected for dust impact monitoring as they are the
representative air sensitive receivers very close to the construction works
areas. Table 2.1 describes the air quality
monitoring locations, which are also depicted in Figures 2.1 and 2.2.
Table 2.1 Locations for Air Quality Monitoring
Stations
|
Monitoring
Stations |
Figure
no. |
Location |
|
AQ1 |
2.1 |
True Light Middle School of Hong Kong |
|
AQ2 |
2.2 |
Aegean Terrace |
2.4.2
The
status and locations of dust sensitive receivers may change after issuing this
Manual. If such cases exist, the ET
Leader shall propose updated monitoring locations, which shall be approved by
the ER and agreed with IEC.
2.4.3
When
alternative monitoring locations are proposed, the following criteria, as far
as practicable, shall be followed:-
·
at the site boundary or such locations close to the
major dust emission source;
·
close to the sensitive receptors; and
·
take into account the prevailing meteorological
conditions.
2.4.4
The ET
Leader shall agree with the ER on the position of the High Volume Sampler for
installation of the monitoring equipment.
When positioning the samplers, the following points shall be noted:
·
a horizontal platform should be provided with
appropriate support to secure the samplers against gusty wind;
·
no two samplers should be placed less than 2 meters
apart;
·
the distance between the sampler and an obstacle, such
as buildings, should be at least twice the height that the obstacle protrudes
above the sampler;
·
a minimum of 2 meters separation from walls, parapets
and penthouses is required for rooftop samples;
·
a minimum of 2 meters separation from any supporting
structure, measured horizontally is required;
·
no furnaces or incineration flues or building
vents are nearby;
·
airflow around the sampler is unrestricted;
·
the sampler is more than 20 meters from the drip line;
·
any wire fence and gate, to protect the sampler, should
not cause any obstruction during monitoring;
·
permission must be obtained to set up the samplers and
to obtain access to the monitoring stations; and
·
a secured supply
of electricity is needed to operate the samplers.
2.5.1
Baseline
monitoring shall be carried out at all the designated monitoring locations for
at least 14 consecutive days prior to the commissioning of the construction
works to obtain daily 24-hour
2.5.2
During the baseline monitoring, there should not be any
construction or dust generation activities in the vicinity of the monitoring
stations.
2.5.3
In
case the baseline monitoring cannot be carried out at the designated monitoring
locations during the baseline monitoring period, monitoring shall be carried
out at alternative locations which can effectively represent the baseline
conditions at the impact monitoring locations.
The alternative baseline monitoring locations shall be approved by the
ER and agreed with IEC.
2.5.4
In
exceptional case, when insufficient baseline monitoring data or questionable
results are obtained, the ET Leader shall liaise with IEC to agree on an appropriate set of data to
be used as a baseline reference and submit to ER for approval.
2.5.5
Ambient
conditions may vary seasonally and shall be reviewed at three monthly
intervals. If the ET Leader considers
that the ambient conditions have been changed and repeat of the baseline
monitoring is required to be carried out for obtaining the updated baseline
levels, the monitoring should be conducted at times when the Contractor’s
activities are not generating dust, at least in the proximity of the monitoring
stations. Should changes in ambient conditions be determined, the baseline
levels and, in turn, the air quality criteria, should be revised. The revised
baseline levels and air quality criteria should be agreed with IEC and
2.6.1
The ET Leader shall carry out impact monitoring during the
course of the Project activities under the Contract. For regular impact monitoring, the sampling
frequency of at least once in every six-day, shall be strictly observed at all
the monitoring stations for 24-hour
2.6.2
The
specific time to start and stop the 24-hr
2.6.3
In
case of non-compliance with the air quality criteria, more frequent monitoring
exercise, as specified in the Event/Action Plan in Section 2.7 shall be conducted within 24 hours after
the result is obtained. This additional monitoring shall be continued until the
excessive dust emission or the deterioration in air quality is rectified.
2.7
Event
and Action Plan for Air Quality
2.7.1
The baseline monitoring results form the basis for
determining the air quality criteria for the impact monitoring. The ET Leader shall compare the impact
monitoring results with air quality criteria set up for 24-hour
Table 2.2 Action
and Limit Levels for Air Quality
|
Parameters |
Action |
Limit |
|
24
Hour |
For baseline level
≤ 200 µg/m³, Action level = (Baseline
level *1.3 + Limit level)/2 For baseline level >
200 µg/m³, Action level = Limit
level |
260 |
|
1
Hour |
For
baseline level ≤ 384 µg/m³,
Action
level = (Baseline level * 1.3 + Limit level)/2 For
baseline level > 384 µg/m³,
Action
level = Limit level |
500 |
Table 2.3 Event/Action
Plan for Air Quality
|
|
ACTION |
|||
|
EVENT |
ET |
IEC |
ER |
CONTRACTOR |
|
ACTION LEVEL |
|
|
|
|
|
1.Exceedance
for one sample |
1. Identify the source and investigate the causes and propose remedial
measures 2. Inform ER & IEC 3. Repeat measurement to confirm finding 4. Increase monitoring frequency to daily |
1.
Check monitoring data submitted by ET 2.Check
Contractor's working methods |
1.Notify
Contractor |
1.Rectify any unacceptable practice 2.Amend working methods if appropriate |
|
2.Exceedance
for two or more consecutive samples |
1. Identify the source 2. Inform ER & IEC 3. Repeat measurements to confirm findings 4. Increase monitoring frequency to daily 5. Discuss with ER & IEC for remedial actions
required 6. If exceedance continues, arrange meeting with
ER & IEC 7. If exceedance stops, cease additional
monitoring |
1.Checking
monitoring data submitted by ET 2.
Check Contractor's working methods 3. Discuss with ET, IEC and Contractor on
proposed remedial actions 4. Advise the ER & ET on the
effectiveness of the proposed remedial measures 5.Supervise
the implementation of the remedial measures |
1.Confirm
receipt of notification of failure in writing 2.Notify
Contractor 3.Ensure
remedial actions properly implemented |
1.Submit proposals for remedial actions to
ER within 3 working days of notification 2.Implement the agreed proposals 3.Amend proposal if appropriate |
|
LIMIT
LEVEL |
|
|
|
|
|
1.Exceedance
for one sample |
1. Identify source,,investigate the causes and propose remedial
measures 2. Inform ER & IEC and 3. Repeat measurement to confirm finding 4. Increase monitoring frequency to daily 5. Assess effectiveness of Contractor's remedial
actions and keep |
1.Check
monitoring data submitted by ET 2.
Check Contractor's working methods 3.
Discuss with ET and Contractor on proposed remedial actions 4.
Advise the ER on the effectiveness of the proposed remedial measures 5.Supervise
the implementation of the remedial measures |
1.Confirm
receipt of notification of failure in writing 2.Notify
Contractor 3.Ensure
remedial actions properly implemented |
1.Take
immediate action to avoid further exceedance 2.Submit
proposals for remedial actions to ER within 3 working days of notification 3.Implement
the agreed proposals 4.Amend
proposal if appropriate |
|
2.Exceedance
for two or more consecutive samples |
1. Identify source 2. Inform ER, IEC and 3. Repeat measurement to confirm findings 4. Increase monitoring frequency to daily 5. Investigate the causes of exceedance 6. Arrange meeting with & IEC and ER to
discuss the remedial actions to be taken 7. Assess effectiveness of Contractor's remedial
actions and keep ER, IEC and 8. If exceedance stops, cease additional
monitoring |
1.Discuss
amongst ER, ET and Contractor on the potential remedial actions 2.Review
Contractor’s remedial actions to assure their effectiveness and advise the ER
accordingly 3.Supervise
the implementation of the remedial measures |
1.Confirm
receipt of notification of failure in writing 2.Notify
Contractor 3.In
consultation with the IEC, agree with the Contractor on the remedial measures
to be implemented 4.Ensure
remedial measure are properly implemented 5.If
exceedance continues, consider what portion of the work is responsible and
instruct the Contractor to stop that portion of work until the exceedance is
abated |
1. Take immediate action to avoid further
exceedance 2. Submit proposals for remedial actions to ER
within 3 working days of notification 3. Implement the agreed proposals 4. Resubmit proposals if problem still not under
control 5. Stop the relevant portion of works as
determined by the ER until the exceedance is abated |
3.1
Noise
Monitoring Parameters
3.1.1
The construction
noise levels shall be measured in terms of the A-weighted equivalent continuous
sound pressure level (Leq). Leq(30 min) shall be used as the monitoring parameter for
the time period between 0700-1900 hours on normal weekdays. A supplementary information for data auditing, statistical
results such as L10 and L90 shall also be obtained for
reference. For
all other time periods, Leq(5 min) shall be employed
for comparison with the Noise Control
Ordinance (NCO) criteria.
3.2.1
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 1.0dB.
3.2.2
Noise
measurements shall not be made in the presence of fog, rain, wind with a steady
speed exceeding 5ms-1 or wind with gusts exceeding 10ms-1. The wind speed shall be checked with a
portable wind speed meter capable of measuring the wind speed in m/s. Sample noise field data sheet is shown in Appendix C to this Manual
for reference.
3.2.3
The ET
Leader shall be responsible for the provision of the monitoring equipment and
associated accessories and power supply.
He shall ensure that sufficient noise measuring equipment and associated
instrumentation are available for carrying out the regular impact monitoring
and ad hoc monitoring. All the equipment
and associated instrumentation shall be clearly labelled. The ET Leader shall also liaise with the
concerned parties for gaining access to the monitoring stations for the
installation of the monitoring equipment and carrying out monitoring.
3.3
Monitoring
Locations for Airborne Construction Noise
3.3.1
Twenty-one
designated monitoring stations, NC1 to NC21 are selected for construction noise
monitoring. Table 3.1 describes the construction noise monitoring locations,
which are also depicted in Figures 2.1, 2.2 and 3.1-3.16. The status and
locations of noise sensitive receivers may change after issuing this manual. If such cases exist, the ET Leader shall
propose updated monitoring locations and seek approval from ER and agreement
from the IEC of the proposal.
Table 3.1 Locations for Airborne Construction
Noise Monitoring Stations
|
Location |
Fig. no. |
Monitoring Stations |
Descriptions |
Status |
|
Eastern Portal |
2.1 |
NC1 |
True Light Middle School of Hong Kong |
School |
|
Eastern Portal |
2.1 |
NC2 |
The Legend (Future development) |
Domestic Premises |
|
Western Portal |
2.2 |
NC3 |
Aegean Terrance |
Domestic Premises |
|
Intakes BR6(P) |
3.1 |
NC4 |
Man Yuen Garden |
Domestic Premises |
|
Intakes BR7(P) |
3.1 |
NC5 |
16 Caronia |
Domestic Premises |
|
Intake DG1(P) |
3.2 |
NC6 |
Blk C Villa Monte Rosa |
Domestic Premises |
|
Intake DG1 |
3.3 |
NC7 |
Rosaryhill School |
School |
|
Intake E5(A)(P) |
3.3 |
NC8 |
Buddist Li Ka Shing Care & Attention Home for the Elderly |
Domestic Premises |
|
Intake E7(P) |
3.4 |
NC9 |
Marymount Secondary School |
School |
|
Intake E7(P) |
3.4 |
NC10 |
117 Blue Pool Road |
Domestic Premises |
|
Intakes MA13(P) & MA14(P) |
3.5 |
NC11 |
The Harbour View |
Domestic Premises |
|
Intake P5(P) |
3.6 |
NC12 |
24 Po Shan Road |
Domestic Premises |
|
Intake PFLR1(P) |
3.7 |
NC13 |
Honey Court |
Domestic Premises |
|
Intake RR1(P) |
3.8 |
NC14 |
Ying Wa Girl’s School |
School |
|
Intake RR1(P) |
3.8 |
NC15 |
Peaksville Court |
Domestic Premises |
|
Intake THR2(P) |
3.9 |
NC16 |
Hong Kong Japanese School |
School |
|
Intake W0(P) |
3.12 |
NC17 |
Sir Ellis Kadoorie Secondary School |
School |
|
Intake W5(P) |
3.13 |
NC18 |
Raimondi College |
School |
|
Intake W8 |
3.14 |
NC19 |
Hong Kong Institute of Technology |
School |
|
Intake W8 |
3.14 |
NC20 |
Blk A, 80 Robinson Road |
Domestic Premises |
|
Intake W12(P) |
3.15 |
NC21 |
92A-92C Sylvanbrook |
Domestic Premises |
3.3.2
When
alternative monitoring locations are proposed, the monitoring locations should
be chosen based on the following criteria:-
(a) at locations close to the major site activities
which are likely to have noise impacts;
(b) close to the noise sensitive receivers. For the purposes of this section, any
domestic premises, hotel, hostel, temporary housing accommodation, hospital,
medical clinic, educational institution, place of public worship, library,
court of law, performing art centre should be considered as noise sensitive
receiver; and
(c) for monitoring locations located in the vicinity of the
sensitive receivers, care should be taken to cause minimal disturbance to the
occupants during monitoring.
3.3.3
The
monitoring station shall normally be at a point 1m from the exterior of the
sensitive receivers building facade and be at a position 1.2m above the
ground. If there is problem with access
to the normal monitoring position, an alternative position may be chosen, and a
correction to the measurements shall be made.
For reference, a correction of +3dB(A) shall be
made to the free field measurements. The
ET Leader shall agree with the IEC on the monitoring position and the
corrections adopted. Once the positions
for the monitoring stations are chosen, the baseline monitoring and the impact
monitoring shall be carried out at the same positions.
3.4.1
The ET Leader shall
carry out baseline monitoring prior to the commencement of the construction
works. The baseline monitoring shall be
carried out daily for a period of at least 14 consecutive days. A schedule on the baseline monitoring for construction noise prior to
the commencement of the construction works shall be submitted to the
ER for approval and IEC agreement before the monitoring starts.
3.4.2
Before
commencing the baseline monitoring, the ET leader
shall inform the IEC of the baseline monitoring programme such that the IEC can
conduct on-site audit to ensure accuracy of the baseline monitoring
results.
3.4.3
There shall not be any construction activities in
the vicinity during the baseline monitoring.
In exceptional cases, when insufficient baseline monitoring data or
questionable results are obtained, the ET Leader shall liaise with IEC to agree
on an appropriate set of data to be used as a baseline reference.
3.4.4
Noise monitoring shall be carried out at all the designated monitoring
stations. The monitoring frequency shall depend on the scale of the
construction activities. The following
is an initial guide on the regular monitoring frequency for each station on a
per week basis when noise generating activities are underway:-
(a) one set of measurements between 0700-1900 hours on
normal weekdays;
(b) one set of measurements between 1900-2300 hours;
(c) one set of measurements between 2300-0700 hours of
next day; and
(d) one set of measurements between 0700-1900 hours on
holidays.
3.4.5
For
the measurements (b), (c) and (d) above, one set of measurements shall at least
include 3 consecutive Leq (5 min) results.
3.5.1
Noise
monitoring shall be carried out at all the designated monitoring stations. The
monitoring frequency shall depend on the scale of the construction
activities. The following is an initial
guide on the regular monitoring frequency for each station once every week in accordance
with the methodology in the TM when noise generating activities are underway:-
·
one set of measurements between 0700-1900 hours on
normal weekdays;
3.5.2
If a
school exists near the construction activity, noise monitoring shall be carried
out at the monitoring stations for the school during the school examination
periods. The ET Leader shall liaise with the school's personnel and the
Examination Authority to ascertain the exact dates and times of all examination
periods during the course of the construction.
3.5.3
In
case of non-compliance with the construction noise criteria, more frequent
monitoring as specified in the Event/Action Plan in Section 3.6 of this Manual shall be carried out. This additional monitoring shall be continued
until the recorded noise levels are rectified or proved to be irrelevant to the
construction activities.
3.6
Event
and Action Plan for Construction Noise
3.6.1
The
Action and Limit levels for construction noise are defined in Table 3.2. Should
non-compliance of the criteria occur, action in accordance with the
Event/Action Plan in Table 3.3, shall be carried
out. As residual impacts are predicted
at some NSRs according to the air borne noise construction noise assessment
presented in the EIA report, the Event/Action Plan and the construction stage
noise EM&A work shall be strictly implemented to facilitate identification
of practicable measures to minimize the residual noise impacts.
Table 3.2 Action and Limit Levels for
Construction Noise
|
Time
Period |
Action |
Limit |
|
0700-1900 hrs on normal weekdays |
When one
documented complaint is received |
75* dB(A) |
|
0700-2300 hrs on holidays; and 1900-2300 hrs on all
other days |
60/65/70** dB(A) |
|
|
2300-0700 hrs of next day |
45/50/55** dB(A) |
* reduce to 70 dB(A)
for schools and 65 dB(A) during school examination periods.
**
to be selected based on Area Sensitivity Rating.
Public
Relationship Strategy
3.7.1
Having
a good public relation with the local communities during the construction stage
of the works is indispensable for smooth implementation of the Project. Prior
to commencement of the construction, visits to the possibly affected local
communities including the District Councils, nearby residents, schools and property
owners will be carried out. The purpose
of the visits is to advise the public the following information in relation to
the Project:
·
the
implementation programme of the works;
·
the
planned construction activities that will be involved;
·
the
possible impacts to the affected communities;
·
the
measures to avoid or mitigate any adverse impacts;
·
the
monitoring programme to check the efficiency of the measures; and
·
the communication channels between the local communities
and the project office for better understanding the efficiency of the measures
taken and the necessity for enhancement of the measures.
3.7.2
To maintain
a better communication link with the local communities, it will specify under
the contract to establish a 24-hour hot line manned by the Contractor such that all the received enquiries or
complaints could be logged immediately and forwarded to the relevant project
officers to follow up. Under the
establishment of the project site office, liaison officers will also be
nominated who are responsible for regular contacts with the local communities
advising them the current progress of works, the efficiency of the
environmental mitigation measures and any follow-up action that have been taken
in responses to any non-compliances or complaints received from the local
communities. It is considered that such
a close relation between the local communities and the project site office
could ensure speedy resolution of any environmental non-compliance and maintain
an environmental standard acceptable to the communities during construction.
Table 3.3 Event/Action Plan for Construction Noise
|
EVENT |
ACTION |
|||
|
|
ET
|
IEC |
ER |
Contractor |
|
Action
Level |
1. Notify IEC, ER and Contractor 2. carry our
investigation by reviewing all the relevant monitoring
data and the corresponding construction activities. Exceedances should also be
confirmed by immediate verification in the field as far as practical. 3. Report the results of investigation to
the IEC, ER and Contractor 4. Discuss with the Contractor and
formulate remedial measures 5. increase monitoring frequency to check
mitigation effectiveness |
1.Review
the analysed results submitted by the ET 2. Review
the proposed remedial measures by the Contractor and advise the ER & ET
accordingly 3.Supervise
the implementation of remedial measures |
1.
Confirm receipt of notification of complaint in writing 2. Notify Contractor 3. require Contractor
to proposed remedial measures for analyzed noise problem 4. Ensure remedial
measures are properly implemented |
1. Identify practicable measures to
minimize the noise impact. Submit
noise mitigation proposals to ET, IEC and ET.
2. Implement noise mitigation proposals |
|
Limit
Level |
1. Notify IEC, ER, 2. Identify the source(s) of impact by
reviewing all the relevant monitoring data and the
corresponding construction activities. Exceedances should also be confirmed
by immediate verification in the field as far as practical. 3. Repeat measurement to confirm findings 4. Increase monitoring frequency 5. Carry out analysis of Contractor’s
working procedures to determine possible mitigation to be implemented. 6. inform IEC, ER and 7. Assess effectiveness of Contractor’s
remedial actions and keep IEC, 8. If exceedance stops, cease additional
monitoring. |
1. Discuss amongst ER, ET, and Contractor
on the potential remedial actions 2. Review Contractor’s remedial actions to
assure their effectiveness and advise the ER &ET accordingly 3.Supervise the implementation of the
remedial measures |
1. Confirm receipt of notification of exceedance
in writing 2. Notify Contractor 3. Require Contractor to propose remedial measures
for the analyzed noise problem 4. Ensure remedial measures are properly
implemented 5. If exceedance continuous, consider what
portion of the work is responsible and instruct the Contractor to stop that
portion of work until the exceedance is aborted |
1. Take immediate action to avoid further
exceedance 2. Identify practicable measures to
minimize the noise impact. Submit
proposals for remedial actions to ER within three working days of
notification 3. Implement the agreed proposals 4. Resubmit proposal if problem still not
under control 5. Stop the relevant portion of works as
determined by the ER until the exceedance is abated |
3.8
Ground
Borne Construction Noise Monitoring
3.8.1
Based
on the recommendations of the EIA study, it is required to carry out ground
borne noise monitoring to ensure that proper control of groundborne noise is executed by the contractor. The monitoring frequency shall be the same as stated in Section 3.5.
3.9
Monitoring
Locations for Groundborne
Construction Noise
3.9.1
Prediction of construction groundborne noise indicates the criteria will be
achieved at all NSRs during day-time.
3.9.2
Eight designated monitoring stations (GNC1 to GNC8) are selected for construction groundborne noise monitoring to check for compliance.
Table 3.4 describes the construction groundborne noise monitoring locations, which are also
depicted in Figures 2.1, 2.2 and 3.16-3.18. The status and locations of noise
sensitive receivers may change after issuing this manual. If such cases exist, the ET Leader shall
propose updated monitoring locations and seek approval from ER and agreement
from the IEC of the proposal.
3.9.3
The
monitoring locations are selected at sensitive receivers (e.g. schools or
domestic premises). The Legend (GNC2)
near Eastern Portal, Aegean Terrance (GNC3) near
Western Portal, Carriana Sasson (
Table 3.4 Locations for Ground borne
Construction Noise Monitoring Stations
|
Location |
Fig. no. |
Monitoring
Stations |
Descriptions |
Status |
|
Near Eastern Portal |
2.1 |
GNC1 |
True Night
Middle School |
School |
|
Near Eastern Portal |
2.1 |
GNC2 |
The Legend (Future development) |
Domestic Premises |
|
Near Western Portal |
2.2 |
GNC3 |
Aegean Terrace |
Domestic Premises |
|
Near Western Portal |
2.2 |
GNC4 |
Carriana Sasson |
Domestic Premises |
|
Near Western Portal |
2.2 |
GNC5 |
Hong Kong University Educational Institute |
School |
|
Tunnel chainage CH+ 1950 |
3.16 |
GNC6 |
French
International School |
School |
|
Near Intake W3(P) |
3.17 |
GNC7 |
Hong Villa |
Domestic Premises |
|
Near Intake W5(P) |
3.18 |
GNC8 |
Raimondi
College |
School |
3.9.4
The criterion include TM for
the Assessment of Noise from Places other than Domestic Premises, Public Places
or Construction Sites (TM-Places) under the NCO stipulates that noise
transmitted primarily through the structural elements of building, or buildings
shall be 10dB(A) less than the relevant ANLs.
3.9.5
Table
3.5 indicates the noise criteria which apply for the groundborne noise
assessment. The ground borne noise
criteria during restricted hours (daytime during holidays, all evening and
nighttime) presented in Tables 3.5, 3.6a and 3.6b which only refer to areas
with
Table 3.5 Construction Ground
Borne Noise Standards
|
|
Ground
Borne Noise Criteria, dB(A) (Leq, 30 mins) |
||
|
Uses |
Daytime (except
General Holidays and Sundays)* |
Daytime
during general holidays and Sundays and all days during Evening (1900
to 2300 hrs)** |
Night
time (2300
to 0700 hrs)** |
|
Domestic
Premises |
65 |
55 |
40 |
|
Educational Institutions (normal periods) |
60 |
55 |
[1] |
|
Educational Institutions (during examination
periods) |
55 |
55 |
[1] |
* 10 dB(A)
below the noise criteria stipulated in EIAO-TM
** 10 dB(A)
below the noise criteria stipulated in GW-TM
[1] No sensitive uses
usually present during these periods
3.9.6
If the ground borne level exceeds in the defined limit
measured during TBM operation, TBM construction work and the associated works
should be restricted during the all days evening / all days night-time / day
time including general holidays and Sundays.
Tables 3.6a and 3.6b show the follow up actions for ground borne noise
monitoring if exceedance is found at representative monitoring locations. The
noise level should be
measured on the ground floor inside the nearest building during the TBM
construction work in the evening and early morning.
Table 3.6a TBM
Working Hours - Sensitive Receiver (Domestic Premise)
|
Scenario |
Monitoring Time |
Monitoring Result |
Working hours of
TBM or associated work operation |
|
A |
Day time |
55 dB(A) < x <
65 dB(A) |
Day time (Except
general holidays and Sundays) (0700 – 1900 hrs) only |
|
B§ |
Day time |
40 dB(A) < x <
55 dB(A) |
Day time
including general holidays and Sundays and all days during evening (0700-2300
hrs) only |
|
C§ |
Day time |
< 40 dB (A) |
No restriction |
Table
3.6b TBM Working Hours - Sensitive Receiver (Education Institution)
|
Scenario |
Monitoring Time |
Monitoring Result |
Working hours of
TBM or associated work operation |
|
D |
Day time |
55 dB(A) < x <
60 dB(A) |
Day time (Except
general holidays and Sundays) (0700 – 1900 hrs) only |
|
E§ |
Day time |
x < 55
dB(A) |
No restriction |
Remarks:
§ - For scenarios
B, C and E, they reflect the working hours are subject to CNP application.
4.1.1
An assessment of potential impacts to water
quality due to the construction and operation of Drainage Improvement in
Northern Hong Kong Island – Hong Kong West Drainage Tunnel has been carried out
and identified in the EIA Report. The water quality assessment in the EIA
identified that the key impacts may arise from the intakes and tunnel
excavation works, construction of temporary berthing point, outlet structure
and stilling basin at western portal. To
minimise the potential impacts arising from the construction on the water
quality in the vicinity of water sensitive receivers, proper construction
methods with good site practices are required. The measures include
installation of proper drainage system to collect site runoff and silt curtain
in the waters around the temporary berthing point to prevent dispersion of
suspended particle. Groundwater level monitoring would also be carried out at
those construction works areas near to the natural streams during the first
year of operation phase (maintenance period) to assess effect of tunnel
construction to the existing ground water regime.
4.1.2
Water
quality monitoring and audit for the project are required to ensure compliance
with the water quality criteria and the effectiveness of the proposed
mitigation measures. Marine water
quality monitoring and audit shall be carried out during the construction
period for the works at the Western Portal. The related construction activities includes construction of temporary berthing
facility, outlet structure, stilling basin, tunnel boring at western
portal. If proper measures are not
taken, it may have short term impacts on the marine water quality.
4.1.3
It was
considered that site inspections should also be required to ensure that the
recommended water pollution mitigation measures would be properly implemented,
functioned and maintained during construction phase of the DP. The requirements
of site inspections are detailed in Section 10.
4.2
Water
Quality Parameters
4.2.1
The
following water quality parameters will be included in the monitoring programme
during construction phase.
Table 4.1 Water
Quality Parameters
|
Phase |
Water
Quality Parameters |
|
Construction |
· Temperature (°C) · pH (pH unit) · turbidity (NTU) · water depth (m) · salinity (mg/L) · dissolved oxygen (DO) (mg/L and % of
saturation) · suspended solids (SS) (mg/L) |
4.3.1
For
water quality monitoring, the following equipments will be supplied by the ET
and approved by the ER.
Dissolved Oxygen (DO) and Temperature Measuring
Equipment
4.3.2
The
instrument for measuring dissolved oxygen and temperature will be portable and
weatherproof completed with cable, sensor, comprehensive operation manuals and
use DC power source. It will be capable of measuring:
· a dissolved oxygen level in the range of 0-20 mg/L and
0-200% saturation; and
· a temperature of 0-45 degree Celsius.
4.3.3
It
will have a membrane electrode with automatic compensation completed with a
cable. Sufficient stocks of spare
electrodes and cables will be available for replacement where necessary (e.g.
YSI model 59 meter, YSI 5739 probe, YSI 5795A submersible stirrer with reel and
cable or an approved similar instrument).
4.3.4
In
situ salinity will be measured to calibrate the DO equipment prior to each DO
measurement if salinity compensation is not built-in in the DO equipment.
Turbidity
4.3.5
Turbidity
will be measured in situ by the nephelometric method. The instrument will be
portable and weatherproof using a DC power source complete with cable, sensor
and comprehensive operation manuals. The equipment will be capable of measuring
turbidity between 0-1000 NTU. The probe cable will not be less than 25m in
length. The meter will be calibrated in order to establish the relationship
between NTU units and the levels of SS.
Suspended Solids (SS)
4.3.6
A
water sampler, consisting of a transparent PVC or glass cylinder of a capacity
of not less that two litres which can be effectively sealed with cups at both
ends will be used (Kahlsico Water Sampler 13SWB203 or an approved similar
instrument). The water sampler will have a positive latching system to keep it
open and prevent premature closure until released by a messenger when the
sampler is the selected water depth.
4.3.7
Water
samples for SS will be collected in high density polythene bottles, packed in
ice and delivered to HOKLAS accredited laboratory for analysis as soon as
possible after collection.
Water Depth Detector
4.3.8
A
portable, battery-operated echo sounder (Seafarer 700 or a similar approved
instrument) will be used for the determination of water depth at each
designated monitoring station. This unit can either be hand held or affixed to
the underside of the survey boat, if the same vessel is to be used throughout
the monitoring programme.
Salinity
4.3.9
A
portable salinometer capable of recording within the range of 0-40 ppt will be
used for salinity measurements.
Water Sampling for Laboratory Analysis
4.3.10
A
water sampler as detailed in Section 4.3.6 will be used to collect samples for
laboratory analysis.
Position System
4.3.11
A
portable salinometer capable of recording within the range of 0-40 ppt will be
used for salinity measurements.
4.3.12
A hand
held or boat fixed type Digital Global Positioning System (DGPS) will be used
to ensure that the correction location has been selected prior to sample
collection. Coordinates checking should
be carried out with a DGPS. The DGPS
should be calibrated at appropriate checkpoint (e.g. Quarry Bay Survey Nail at
Easting 840683.49, Northing 816709.55) to ensure the monitoring station is at
the correct position before taking measurement and water samples.
Sample Container and Storage
4.3.13
Following
collection, water samples for SS analysis will be stored in high density
polythene bottles with no preservative added, packed in ice (cooled to 4°C without being frozen), delivered to the laboratory
and analysed as soon as possible.
Calibration of In Situ Instruments
4.3.14
All in
situ monitoring instruments will be checked, calibrated and certified by a
laboratory accredited under HOKLAS or other international accreditation scheme
before use, and subsequently re-calibrated at 3 monthly intervals throughout
all stages of the water quality monitoring.
4.3.15
For
the on site calibration of field equipment, the BS 1427:1993, "Guide to
Field and on-site test methods for the analysis of waters" will be
observed.
4.3.16
Sufficient
stocks of spare parts will be maintained for replacements when necessary.
Backup monitoring equipment will also be made available so that monitoring can
proceed uninterrupted even when some equipment is under maintenance,
calibration, etc.
Laboratory Analytical Methods
4.3.17
Analysis
of SS will be carried out in a HOKLAS or other international accredited
laboratory. The following table shows the standard test methods of the proposed
determinants for laboratory analysis.
Table
4.2 Methods for Laboratory Analysis
for Water Samples
|
Parameters
(Unit) |
Suggested
Method |
Detection
Limit |
|
SS (mg/L) |
APHA 2540 D |
< 0.1 mg/L |
Notes:
APHA= American Public Health Association:
Standard Methods for the Examination of Water and Wastewater Ed 19
4.3.18
The
testing laboratory will be HOKLAS accredited (or if not, approved by the ER)
and comprehensive quality assurance and control procedures in place in order to
ensure quality and consistency in results.
4.3.19
If a
site laboratory is set up or a non-HOKLAS and non-international accredited
laboratory is hired for carrying out the laboratory analysis, the laboratory
equipment, analytical procedures, and quality control will be approved by ER.
All the analysis will be witnessed by the ER.
4.3.20
The ET
will provide the ER with one copy of the relevant chapters of the
"Standard Methods for the Examination of Water and Wastewater"
updated edition and any other relevant document for his reference.
4.3.21
For the
testing methods of other parameters as recommended by
4.4.1
The marine water quality monitoring locations are shown
in Figure 4.1 and ground water level (borehole with piezometer) monitoring
locations are shown in Figures 2.1, 3.7, 3.9, 3.10, 3.11 and 3.15. Prior to the
commencement of the EM&A programme, the ET leader shall agree with ER and
Table 4.3 Methods for Laboratory Analysis for Water Samples
|
Monitoring station |
Fig. no. |
Description |
Easting |
Northing |
Monitoring Parameters |
|
Underground water |
|
||||
|
UC1 |
2.1 |
Eastern Portal |
(i) |
(i) |
Underground
water level is the monitoring parameter to be measured at each ground water
monitoring stations. Marine
water quality parameters to be monitored include temperature, pH, turbidity,
water depth, salinity, dissolved oxygen (DO) and suspended solids (SS). |
|
UC2 |
3.7 |
PFLR1(P) |
(i) |
(i) |
|
|
UC3 |
3.9 |
THR2(P) |
(i) |
(i) |
|
|
UC4 |
3.10 |
TP5(P) |
(i) |
(i) |
|
|
UC5 |
3.11 |
TP789(P) |
(i) |
(i) |
|
|
UC6 |
3.15 |
W12(P) |
(i) |
(i) |
|
|
Marine Water |
|||||
|
CE |
4.1 |
Control station (Ebb) |
830026 |
814956 |
|
|
CF |
4.1 |
Control station (Flood) |
831778 |
812420 |
|
|
I1 |
4.1 |
Impact Station |
831088 |
813654 |
|
|
I2 |
4.1 |
Impact Station |
831105 |
813582 |
|
|
Intake A |
4.1 |
Impact Station (Cyberport intake) |
831603 |
813044 |
|
|
Intake B |
4.1 |
Impact Station
(Queen Mary Hospital/Sha Wan Drive intake) |
830606 |
814583 |
|
Note : (i) The location of
ground water monitoring stations shall be determined on site to suit the actual
conditions
4.4.2
The final locations and number of the monitoring points
shall be agreed with
4.4.3
When alternative monitoring locations are proposed, they
shall be chosen based on the following criteria:
(a) at locations close to and preferably at
the boundary of the mixing zone of the major site activities as indicated in
the EIA final report, which are likely to have water quality impacts;
(b) close to the
sensitive receptors which are directly or likely to be affected;
(c) for monitoring
locations located in the vicinity of the sensitive receptors, care shall be
taken to cause minimal disturbance during monitoring;
4.4.4
Control stations are necessary to compare the water
quality from potentially impacted sites with the ambient water quality. Control stations shall be located within the
same body of water as the impact monitoring stations but shall be outside the
area of influence of the works and, as far as practicable, not affected by any
other works. For underground water
monitoring, the measured ground water levels should be compared with the
pre-construction monitoring data carried out by the project office.
4.4.5
Replicates in-situ measurements and sample (except
ground water monitoring) collected from each independent sampling event are
required for all parameters to ensure a robust statistically interpretable
dataset.
Marine Water
4.5.1
Baseline conditions for water quality will be established
and agreed upon with ER and
4.5.2
The baseline conditions will normally be established by
measuring all the water quality parameters for the construction phase
monitoring as illustrated in Figure 4.1. The measurements will be taken at all
designated monitoring stations 3 days per week, at mid-flood and mid-ebb tides,
at three depth locations (i.e. 1 m below surface, mid-depth and 1m from bed),
for a period of 4 weeks prior to the commencement of marine works. The interval between two sets of monitoring will
not be less than 36 hours and the baseline monitoring schedule will be
submitted to ER and
4.5.3
Measurements will be taken at 3 water depths, namely, 1m
below water surface, mid-depth and 1m above sea bed, except where the water
depth less than 6 m, the mid-depth station may be omitted. Will the water depth be less than 3 m, only
the mid-depth station will be monitored. The ET will
seek approval from
4.5.4
There will not be any marine construction activities in
the vicinity of the stations during the baseline monitoring.
4.5.5
In exceptional cases when insufficient baseline
monitoring data or questionable results are obtained, the ET Leader will seek
approval from
Underground water level
4.5.6
In order to ensure the water levels at those intakes
near to the natural stream courses and thus on the surrounding habitats will
not be significantly affected, the groundwater levels will be measured
throughout the construction and the first year of tunnel operation period. A
one-year ground water level monitoring program has been started since November 2004 for
those ground water stations in the vicinity of the relevant intake
structure. The data set will form the
basis to assess the baseline line conditions.
These data will be submitted to IEC prior to the commencement of
construction works.
Marine Water
4.6.1
During the course of the marine works, monitoring will
be undertaken three days per week, at mid-flood and mid-ebb tides, with
sampling/measurement at the designated monitoring stations. The interval between two sets of monitoring
will not be less than 36 hours except where there are exceedances of Action
and/or Limit levels, in which case the monitoring frequency will be
increased.
4.6.2
Measurements will be taken at 3 water depths, namely, 1m
below water surface, mid-depth and 1 m above sea bed, except where the water
depth less than 6 m, the mid-depth station may be omitted. Will the water depth be less than 3 m, only
the mid-depth station will be monitored.
4.6.3
Proposed water quality monitoring schedule shall be sent
to ER and
4.6.4
The Action/Limit levels will be agreed with ER and
4.6.5
Upon completion of all marine activities, a post project
monitoring exercise on water quality shall be carried out four weeks in the
same manner as the impact monitoring.
Table
4.4 Action /Limit Levels for Marine
Water Quality
|
Parameter
(unit) |
Action |
Limit |
|
Dissolved
Oxygen (mg/L) (surface,
middle, bottom) |
Surface and middle 5%-ile
of baseline for surface and middle layers Bottom 5%-ile
of baseline for bottom layer |
Surface and middle 4
mg/L or 1%-ile of baseline for surface and middle layers Bottom 2
mg/L or 1%-ile of baseline for bottom layer |
|
SS
(mg/L) Depth
average |
95%-ile
of baseline data or 120% of upstream control station’s SS at the same tide of
the same day |
99%-ile
of baseline or 130% of SS readings at the upstream control station at the
same tide of same day and specific sensitive receiver water quality
requirements |
|
Turbidity
(NTU) (depth
average) |
95%-ile
of baseline data or 120 % of upstream control station’s turbidity at the same
tide of the same day |
99%-ile
of baseline or 130% of turbidity at the upstream control station at the same
tide of same day |
Notes:
§
For DO,
non-compliance of the water quality limit occurs when monitoring result is
lower than the limit.
§
For SS &
turbidity non-compliance of the water quality limits occur when monitoring
result is higher than the limits.
§
All the figures given in the table are used for
reference only and the
Underground water level
4.6.6
It is proposed to measure the groundwater levels once
per month during the construction and in the first year of operation and the monitoring
program will be subject to review. Monitoring data
will be submitted to
4.6.7
Proposed ground water monitoring schedule shall be sent
to
4.7
Event
and Action Plan for Water Quality
Marine Water
4.7.1
When the monitoring results of the water quality
parameters at any designated monitoring stations exceed the water quality
criteria, the actions in accordance with the Action Plan in Table 4.5 will be
carried out.
Groundwater Level at Sensitive Intake Sites
4.7.2
It has been identified the intake sites at Eastern
Portal, PFLR1(P), THR2(P), TP5, TP789 and W12 have sensitive ecological features. Monitoring of groundwater levels at these
sites is proposed to ensure that construction and operation of the intake and
drop shaft structures do not adversely impact on the local groundwater
levels. Subject to review, the monitoring will be
carried out monthly during the
construction of the intakes and drop shafts and for the first year of the
operation of the intakes which coincides with the maintenance period of the
construction contract.
4.7.3
Data will be recorded from the monitoring stations and
regularly analysed. Indicators highlight
possible induced changes in groundwater levels may include –
·
A sudden lowering of the groundwater level within a day;
·
No change or a lowering in groundwater level during
periods of substantial rainfall;
·
A sustained lowering of the groundwater level over a
longer period with rainfall;
4.7.4 When one of the criteria listed above is
met the structures will be examined for signs of significant infiltration. If no infiltration is observed it is unlikely
that the structures are causing the change in groundwater levels. If infiltration is observed then remedial action
will be taken immediately that may include taking measures to stop the
infiltration.
Table 4.5 Event and Action Plan for Water Quality
|
EVENT |
ACTION |
|||
|
ET |
IEC |
ER |
CONTRACTOR |
|
|
ACTION
LEVEL |
|
|
|
|
|
Action level
being exceeded by one sampling day |
1. Repeat
in situ measurement to confirm findings; 2. Identify
source(s) of impact; 3. Inform
IEC, contractor and ER; 4. Check
monitoring data, all plant, equipment and Contractor’s working methods. 5.
Discuss mitigation measures with IEC and Contractor 6.
Repeat measurement on next day of exceedance. |
1. Discuss with ET and Contractor on the
mitigation measures. Review proposals
on mitigation measures submitted by Contractor and advise the ER accordingly;
and 2. Assess the effectiveness of the
implemented mitigation measures. |
1. Discuss with IEC on the proposed
mitigation measures; and 2. Make agreement on the mitigation
measures to be implemented. |
1. Inform the ER and confirm notification
of the non-compliance in writing; 2. Rectify unacceptable practice; 3. Check all plant and equipment; 4. Consider changes of working methods; 5. Discuss with ET and IEC and propose
mitigation measures to IEC and ER; 6. Implement the agreed mitigation
measures. |
|
Action
level being exceeded by more than one consecutive sampling days |
1.
Repeat in-situ measurement to confirm findings; 2. Identify
source(s) of impact; 3. Inform
IEC, contractor; 4. Check
monitoring data, all plant, equipment and Contractor’s working methods; 5. Discuss
mitigation measures with IEC, ER and
Contractor; 6. Ensure
mitigation measures are implemented; 7. Prepare
to increase the monitoring frequency to daily; 8.
Repeat measurement on next day of exceedance. |
1. Discuss with ET and Contractor on the
mitigation measures. Review proposals
on mitigation measures submitted by Contractor and advise the ER accordingly;
and 2.
Assess the effectiveness of the implemented mitigation measures. |
1. Discuss with IEC on the proposed
mitigation measures; and 2. Make agreement on the mitigation
measures to be implemented. 3. Assess the effectiveness of the
implemented mitigation measures. |
1. Inform the Engineer and confirm
notification of the non-compliance in writing; 2.
Rectify unacceptable practice; 3.
Check all plant and equipment and 4.
Consider changes of working methods; 5.
Discuss with ET and IEC and propose mitigation measures to IEC and ER
within 3 working days; 6.
Implement the agreed mitigation measures. |
|
EVENT |
ACTION |
|||
|
ET |
IEC |
ER |
CONTRACTOR |
|
|
LIMIT
LEVEL |
|
|
|
|
|
Limit level being exceeded by one sampling
day |
1. Repeat
measurement on next of exceedance to confirm findings; 2.
Identify source(s) of impact; 3. Inform IEC, contractor, ER and 4. Check monitoring data, all plant, equipment
and Contractor’s working methods; 5. Discuss
mitigation measures with IEC, ER and Contractor; |
1. Check monitoring data submitted by ET
and Contractor’s working methods. 2. Discuss with ET and Contractor on possible mitigation measures; 3. Review the proposed mitigation measures
submitted by Contractor and advise the ER accordingly; |
1. Confirm receipt of notification of
failure in writing 2. Discuss with IEC, ET and Contractor on
the proposed mitigation. 3.
Request Contractor to view the working methods. 4.
Ensure mitigation measures are properly implemented. |
1. Inform the ER and confirm notification
of the non-compliance in writing; 2. Rectify unacceptable practice; 3
Check all plant and equipment and consider changes of working methods; 4.
Discuss with ET, IEC and ER and propose mitigation measures to ER and
IEC within 3 working days; 5. Implement the agreed mitigation
measures. |
|
Limit level being exceeded by more than
one consecutive sampling days |
1. Repeat
measurement on next of exceedance to confirm findings; 2. Identify
source(s) of impact; 3.
Inform IEC, contractor, ER and 4. Check monitoring data, all plant, equipment and Contractor’s working methods; 5.
Discuss mitigation measures with IEC, ER and Contractor; 6. Ensure
mitigation measures are implemented; 7. Increase
the monitoring frequency to daily until no exceedance of Limit level for two
consecutive days; |
1.
Check monitoring data submitted by ET and Contractor’s working
methods. 2.
Discuss with ET and Contractor on possible mitigation measures; 3.
Review the proposed mitigation measures submitted by Contractor and
advise the ER accordingly; 4.
Supervise the implementation of mitigation measures. |
1.
Discuss with IEC, ET and Contractor on the proposed mitigation
measures; 2.
Request Contractor to critically review the working methods; 3.
Make agreement on the mitigation measures to be implemented; 4.
Ensure mitigation measures are properly implemented; 5.
Consider and instruct, if necessary, the Contractor to slow down or to
stop all or part of the construction activities until no exceedance of Limit
level |
1. Take
immediate action to avoid further exceedance 2. Discuss
with ET, IEC and ER and propose mitigation measures to ER and IEC within 3
working days; 3. Implement the agreed mitigation
measures; 4. Resubmit proposals of mitigation measures
if problem still not under control; 5. As directed by the Engineer, to slow
down or to stop all or part of the construction activities until no
exceedance of Limit level. |
5.1.1
The
Contractor is responsible for the management of materials and wastes arising
during construction. This includes
control of wastes on site, removal of the waste materials from the site and the
implementation of any mitigation measures to minimize waste or redress any
problems that arise from waste associated with the works. In addition to C&D waste and general refuse, this material may include sewage, waste water or any
other site discharges on to adjacent land, sewers, or water course.
5.1.2
This
section sets out the measures to be adopted to avoid or minimize potential
adverse impacts associated with waste arising from the works under the headings
of each waste type. The Contractor
should incorporate these recommendations into a comprehensive on-site waste
management plan (WMP). If, for any reason,
the recommendations cannot be implemented, full justification should be given
in the WMP.
5.1.3
The
WMP should be prepared in accordance with
ETWB Technical Circular No. 15/2003 – Waste Management on Construction Sites and submitted for approval by the Engineer’s
Representative prior any construction activities. During the construction period the WMP should
be used as a working document to detail the on-going management procedures and
to record waste arising and import of fill throughout the Contract. The WMP shall be subject to audit by
IEC.
5.1.4
The
WMP should include at least the following information:
·
the types and quantities of waste,
·
timing and activities of waste generation,
·
locations for temporary storage,
·
considerations for recycle,
·
reuse and destinations for final disposal
5.1.5
According
to the assessment, the excavation of the vertical intake shafts will mainly be
carried out from the tunnel upwards (raise boring method) and therefore, those
excavated spoil will be transported (drop down) via the intake shafts and then
to either ends of drainage tunnel. Approximate negligible amount of excavated
material (1,000 m³) will require transport on the ground surface from six (W8,
W5, RR1, THR(2), WO and HR1) intake shafts only and
disposed by trucks. Estimated total quantity of spoil generated during
construction at both portals will be approximately 522,000 m³ for granite and
volcanic rock (including 1,500 m³ for soil).
5.1.6
As
most the majority of excavated material will be comprised of rocks, no re-use on site is identified and it will
require off-site disposal either at suitable public fill areas or designated
landfills or for re-use on other construction projects where good quality fill
material is required. Estimated quantity will be about 185,100 m³ at Eastern
portal (Table 5.1a) which will be transported by trucks and about 337,000 m³ at
Western portal (Table 5.1b) which will be transported by barge respectively.
Estimated
Spoil Generated Breakdown from Eastern Portal for 24 hours TBM operation regime
|
Eastern
Portal |
Construction
Period & Duration |
Total
volume, m³ |
m³/month |
m³
/ day by truck |
|
Bored tunnel (Tai Hang Road to Aberdeen
Tunnel) |
Early
June 2008 to End July 2010 (26
months) |
167,707 |
6,450 |
215 |
|
Adits (Granite & Volcanic Rock) |
Mid
September 2008 to End April 2011 (31.5
months) |
13,741 |
436 |
15 |
|
Adits (Soil) |
- |
- |
- |
|
|
Intake Shafts & Ventilation Pipes
(Granite & Volcanic Rock) |
End
August 2008 to Mid May 2011 (33.5
months) |
3,165 |
95 |
3 |
|
Intake Shafts & Ventilation Pipes
(Soils) |
460 |
14 |
0.5 |
|
|
Total |
|
185,073 |
6,995 |
233.5 |
Estimated
Spoil Generated Breakdown from Western Portal for 24 hours TBM operation regime
|
Eastern
Portal |
Construction
Period & Duration |
Total
volume, m³ |
m³/month |
m³
/ day by barge |
|
Bored tunnel (Aberdeen Tunnel to Pok Fu
Lam) |
Early
June 2008 to Mid August 2010 (26.5
months) |
308,674 |
11,648 |
388 |
|
Adits (Granite & Volcanic Rock) |
Mid
September 2008 to Mid April 2011 (31
months) |
17,636 |
569 |
19 |
|
Adits (Soil) |
- |
- |
- |
|
|
Intake Shafts & Ventilation Pipes
(Granite & Volcanic Rock) |
End
August 2008 to Early June 2011 (34
months) |
9,625 |
283 |
10 |
|
Intake Shafts & Ventilation Pipes
(Soils) |
1,032 |
30 |
1 |
|
|
Total |
|
336,967 |
12,530 |
418 |
6.1
EIA
report indicates that no unacceptable residual impact due to the construction
and operation of the tunnel and intake structures is expected after the
implementation of the proposed mitigation measures. The design has been developed based on
avoidance, minimisation and compensation to reduce the ecological impact. There is no special requirement about
EM&A programme for the ecological impact.
Nevertheless, the following mitigation measures as recommended in EIA
report are required to minimise the impact.
The measures should be audited to ensure the effective implementation of
mitigation measures.
6.2
During
the detailed design stage, the following issues should be taken into account to
further minimise the impacts:
·
Refinement of site limit to minimise temporary
loss of natural stream habitat during construction;
·
Refinement of site limit of temporary works area
to minimise loss of woodland habitat, in particular for temporary works area at
Eastern Portal;
·
Minimizing felling of large trees; and
·
Transplanting
of trees of rare species or high amenity values if it is found in the path of
the permanent works (e.g. the Artocarpus hypargyreus at intake shaft
HKU1).
6.3
Good
site practice including the following, should be enforced to minimise the
disturbance to the surroundings:
·
Treat any damage that may occur to individual
major trees in the adjacent area using material and method appropriate for tree
surgery;
·
Reinstate work sites/disturbed areas immediately
after completion of the construction works, in particular, through on-site
tree/shrub planting along the woodland and shrubland section within the
temporary works area. Tree/shrub species
used should be the same as the surrounding area; and
·
Regularly check the work site boundaries to
ensure that they are not exceeded and that no damage occurs to surrounding
areas.
6.4
Impact
of permanent loss of 0.16ha of woodland by site formation and temporary loss of
0.53 ha of woodland within the works area would be mitigated by on site
compensatory planting at various intake points and the Western Portal
area. A total of 1.02 ha of area would be replanted with
woodland species, reaching almost a 1.5:1 ratio for compensatory planting. Tree/shrub species used for compensatory
planting should be based on those in the surrounding area.
6.5
Measures
are needed to maintain the flow of the affected streams/nullahs during the
construction stages. Temporary bypass should be provided if the stream/nullah
flows will be cut off by the construction works. After the construction works
are finished, sections of temporary loss should be reinstated. Measures should also be taken to avoid runoff to streams and
marine habitats. Streams/channels that could potentially be affected during
construction should be prevented from sedimentation by erection of sediment
barriers. Site runoff should be desilted by siltation traps in streams/channels or
diverted, to reduce the potential for suspended sediments, organics and other
contaminants to enter the local stream environment.
6.6
The
majority of the permanent stream habitat loss would come from
the modification of a section of stream channel (54 m) immediately upstream
from the Eastern Portal.
Mitigation measures include introduction of low flow channel within the
channelised section to maintain a deeper water depth, in particular during dry
season. And there would be a basin at
the end of the channelised section. Both
structures could provide living space for aquatic life within the channelised
section. Furthermore, step chute in the
form of a series of descending water pools would be constructed between the low
flow channel and the undisturbed stream course.
There would also be openings for aquatic fauna between each chute step
(pool). These could work like a “ladder” to help avoid isolating the aquatic
fauna in the channelised section from natural habitats.
6.7
Surveys
of amphibians at E4(P), PFLR1(P), W12(P), MB16,
E5(B)(P), TP789(P) and P5(P) prior to commencement of construction is
recommended. Frogs (including Hong Kong Cascade Frog and Lesser Spiny Frog) and tadpoles found at work areas of these proposed
intake points will be collected and translocated to nearby streams that will
not be affected by the project. These procedures should be performed by
experienced herpetologists. A detailed
translocation proposal will be submitted during the detailed design stage.
6.8
According
to the EIA report, the potential impacts on marine ecology due to the Project
is limited and would be controlled by the water quality mitigation
measures and monitoring
programme outlined in Section 4 of this Manual. The programme would ensure that
no unforeseen water quality impacts occur to the ecological receivers, and
hence no additional monitoring measures are proposed specifically for
ecological receivers.
6.9
Potential
sources of marine water quality impact during construction phase include:
·
Site runoff;
·
Suspended solid during the construction and
demolition of the berthing point; and
·
Construction of the stilling basin.
6.10
Silt
curtain will be deployed during the construction and demolition of the
temporary berthing point. With the deployment of silt curtains around the
berthing point area, adverse water quality impact would not be anticipated. No
significant ecological impact is anticipated.
6.11
The
stilling basin will be constructed by the side of shoreline. Its invert will be at -5.4 mPD which is below
the sea level. A cofferdam in the form of pipe-pile
wall is to be erected outside the stilling basin prior to the construction of
basin. The cofferdam will be dewatered
to provide a working space for the construction of stilling basin and prevent
mitigation of suspended particles from the work site to the sea.
6.12
A
speed limit of 10 knots should be strictly enforced in particular in the waters
between the outfall location at Western Portal and the navigation channel in
East Lamma channel to avoid causing injury to cetacean.
7.1
The
construction and operation of the Project will not give rise to significant impacts to fisheries as there is no
predicated adverse impact to water quality and only
insignificant loss of fishing
ground. The impacts of the Project on fisheries
resources could be monitored indirectly through the water quality EM&A
programme. The recommended mitigation measures for protecting fisheries
resources are outlined as follows.
7.2
Potential
sources of impact during construction phase include:
·
Site runoff;
·
Suspended solid during the construction and
demolition of the berthing point; and
·
Construction of the stilling basin.
7.3
Site
runoff will be controlled by general site practices during the construction.
7.4
Silt
curtain will be deployed during the construction and demolition of the
temporary berthing point. With the deployment of silt curtains around the
berthing point area, adverse water quality impact would not be anticipated. No
significant fisheries impact is anticipated.
7.5
The
stilling basin will be constructed by the side of the shoreline. Its invert is at about -5.4 mPD which is
below the sea level. A cofferdam in the form of pipe-pipe wall is to
be erected outside the stilling basin prior to the construction of basin. The cofferdam will be dewatered to provide a
working space for the construction of stilling basin and prevent mitigation of
suspended particle from the work site to the sea.
8.1.1
Preservation
of existing landscape/visual resources are the primary considerations in the
design of this project. Losses of
landscape/visual resources are unavoidable for construction of the proposed
structure but all of these shall be limited to an absolute minimum to minimize
the landscape and visual impact.
8.1.2
The
EIA has recommended mitigation measures for landscape and visual resources
during both the construction and operational phases of the Project. The implementation and maintenance of the
landscape compensatory planting measures is a key aspect which should be
checked to ensure that the proposals are fully realised.
8.2
Mitigation
Measures for Landscape and Visual during Construction
8.2.1
The
EIA has recommended mitigation measures for landscape and visual resources
during both the construction and operation phases of the Project. The implementation and maintenance of the
landscape compensatory planting measures is a key aspect which should be
checked to ensure that the proposals are fully realised.
8.2.2
Major source of visual impact during the
construction phase of the project are due to the permanent loss of existing
vegetation and temporary construction works.
After implementation of following mitigation measures, the
residual visual impacts during the construction phase are considered acceptable with mitigation
measures:
·
Topsoil,
where identified, should be stripped and stored for re-use in the construction
of the soft landscape works, where practical.
·
Existing
trees to be retained on site should be carefully protected during
construction.
·
Trees
unavoidably affected by the works should be transplanted where practical.
·
Compensatory
tree planting should be provided to compensate for felled trees.
·
The
extent of disturbance on the existing stream course should be minimized.
·
Control
of night-time lighting
·
Erection
of decorative screen hoarding.
·
The
landscape/reinstatement works at site area should be completed as early as
possible.
8.3
Mitigation
Measures for Landscape and Visual during Operation
8.3.1
Major source of visual impact during the operation
phase of the project are due to the change in existing visual quality due to
the permanent alienation of landscape areas for the Eastern Tunnel Portal,
Western Tunnel Portal and the intake structures and permanent erection of the
above ground structures for the Eastern and Western Tunnel Portals. After implementation of following mitigation
measures, the residual visual impacts during the operation phase are considered
acceptable with mitigation measures.
·
Aesthetic
design of above ground structures with the finishes and color matching with the
surrounding environment.
·
Toe
planter with tall tree and shrub planting shall be provided to screen the
Eastern Portal Tunnel and the retaining wall for access road.
·
Buffer
tree and shrub planting shall be provided to screen above ground structures and
blend in the structures with the surrounding landscape setting.
·
Existing
hard and soft landscape areas to be affected by temporary works shall be
reinstated.
·
The
proposed intake structure that are within existing
playground/sitting out areas shall be designed to be accommodated underground
except the ventilation column and the necessary facilities. Upon completion of the construction, the
areas will be reinstated to match with the surrounding landscaping settings for
the enjoyment of the public.
9.1.1
The
works associated with proposed drainage tunnel will have no impact on
terrestrial or marine archaeological resources, cultural or historical
landscapes or historical graves. Archaeological
monitoring work during the construction and operation phases of the project is,
therefore, not required. Four
built heritage resources have been identified in the EIA study as falling
within the 50m Study Area of the DP. Two of these resources, i.e. the Catholic
Cathedral of the Immaculate Conception on Caine Road and the Hop Yat Church on
Bonham Road, have been found to be located at sufficient distance from the
works that no adverse impacts would result from the project during the
construction or operational phases. Two other resources (located within close
proximity to works areas) will require mitigation during the construction phase
to mitigate against the identified adverse impacts.
These are the Haw Par Mansion site and the Former Explosive Magazine of the
Victoria Barracks.
9.2
Mitigation
Measures for Cultural Heritage
Haw Par
Mansion
9.2.1
A
condition survey must be undertaken prior to the commencement of construction
works, to assess the structural integrity of the building, (with special
attention paid to any fragile architectural features) and to determine if
vibration monitoring and/or other protective measures will be necessary during
the construction phase. Implementation of the survey and any recommended
protective measures will be the responsibility of the contractor.
Boundary Wall and Gate of Haw
Par Mansion Site
9.2.2
A
condition survey must be undertaken prior to the commencement of construction
works, to assess the structural integrity of the wall and gate and to determine
if vibration monitoring and/or any other protective measures will be necessary
during the construction phase.
Implementation of the survey and any recommended protective measures
will be the responsibility of the contractor.
9.2.3
The
contractor will also be responsible for ensuring that a 3 metre buffer zone
(clearly demarcated by a temporary fence) is maintained between the boundary
wall and gate and the works area (during construction works for both the tunnel
portal and the permanent vehicle access ramp), to enable access for routine
maintenance to the wall. In addition,
the buffer zone could protect the wall not being damaged by machinery operation
during construction phases.
Former
Explosive Magazine of the former Victoria Barracks
9.2.4
A
condition survey must be undertaken prior to the commencement of construction
works, to assess the structural integrity of the wall and the extent of damage
from cracks and vegetation growth, to determine if vibration monitoring and/or
any other protective measures will be necessary during the construction phase.
Implementation of the survey and any recommended protective measures will be
the responsibility of the contractor.
9.2.5
The
contractor will also be responsible for ensuring that a 3 meter buffer zone
(clearly demarcated by a temporary fence) will be maintained between the
retaining wall and the works area.
9.2.6
The
condition surveys as described in Sections 9.2.1, 9.2.2 and 9.2.4 must be
carried out in advance of works and report(s) must be compiled, containing
description of the types of construction, identification of fragile elements,
an appraisal of the condition and working methods for any proposed monitoring
and precautionary measures that are recommended. The report(s) must be
submitted to AMO for approval at least one month before construction activities
commence. Upon approval the contractor shall implement the approved monitoring
and precautionary measures.
9.2.7
The
condition surveys should be conducted by a registered structural engineer or a
conservation architect, who should be agreed by the AMO before the condition surveys
take place. The contractor should inform AMO the time schedule of the condition
surveys and notify AMO well in advance prior to the commencement of the
condition surveys so as to allow AMO to arrange the on-site monitoring, if
necessary. The ET team leader should
check whether a registered structural engineer or a conservation
architect has been employed by the
Contractor to conduct the condition surveys. The survey methodology and
locations should be checked against with the requirements agreed between the registered
structural engineer or conservation architect
and AMO. Any recommended mitigation
measures should be agreed with and to the satisfaction of the AMO.
10.1.1
Site
Inspections/Audits provide a direct means to trigger and enforce the specified
environmental protection and pollution control measures. They shall be undertaken routinely to inspect
the construction activities in order to ensure that appropriate environmental
protection and pollution control mitigation measures are properly
implemented. With well defined pollution
control and mitigation specifications and a well established site inspection,
deficiency and action reporting system, the site inspection is one of the most
effective tools to enforce the environmental protection requirements on the
construction site.
10.1.2
The ET
Leader is responsible for formulation of the environmental site inspection,
deficiency and action reporting system, and for carrying out the site
inspection works. He shall submit a
proposal on the site inspection, deficiency and action reporting procedures
within 21 days of the commencement of Contract to the Contractor for agreement
and to the ER and the IEC for approval.
10.1.3
Regular
site inspections / audits shall be carried out at least once per week. The areas of inspection shall not be limited
to the environmental situation, pollution control and mitigation measures
within the site; the ET Leader shall also review the environmental situation
outside the site area which is likely to be affected, directly or indirectly,
by the site activities. The ET Leader
shall make reference to the following information in conducting the
inspection:-
(a) the EIA
recommendations on environmental protection and pollution control mitigation
measures;
(b) works progress and programme;
(c) individual works
methodology proposals (which shall include proposal on associated pollution
control measures);
(d) the contract
specifications on environmental protection;
(e) the relevant
environmental protection and pollution control laws; and
(f) previous site
inspection results.
10.1.4 The ET Leader shall liaise with the
Contractor to update all relevant information of Contract for him to
carry out the site inspections / audits. The inspection results and the
associated recommendations on improvements to the environmental protection and
pollution control works shall be submitted to the ER, the IEC and the
Contractor within 24 hours, for reference and for taking immediate action. The Contractor shall follow the procedures
and time-frame as stipulated in the environmental site inspection, deficiency
and action reporting system formulated by the ET Leader to report on any
remedial measures subsequent to the site inspections / audits.
10.1.5 The ET Leader shall carry out ad hoc site
inspections / audits if significant environmental problems are identified. He shall also carry out any inspections/
audits required subsequent to receipt of an environmental complaint, or as part
of the investigation work, as specified in the Action Plan for environmental
monitoring and audit.
10.2
Compliance
with Legal and Contractual
Requirements
10.2.1 There are contractual environmental
protection and pollution control requirements as well as environmental
protection and pollution control laws in Hong Kong which the construction
activities shall comply with.
10.2.2 In order that the works are in compliance
with the contractual requirements, all the works method statements submitted by
the Contractor to the ER for approval shall also be sent to the ET Leader and the IEC for
vetting to see whether sufficient environmental protection and pollution
control measures have been included.
10.2.3 The ET Leader shall also be responsible for
certifying the environmental acceptability of permanent and temporary works,
and the environmental acceptability of relevant design plans and submissions.
10.2.4 The ET Leader shall also review the
progress and programme of the works to check that relevant environmental laws
have not been violated, and that any foreseeable potential for violating the
laws can be prevented.
10.2.5 The Contractor shall regularly copy
relevant documents to the ET Leader and the IEC so that the checking work can
be carried out. The document shall at
least include the updated Work Progress Reports, the updated Works Programme, the application letters for different license/permits under
the environmental protection laws, and all valid licenses/permits. The site
diary shall also be available for the ET Leader's inspection upon his request.
10.2.6 After reviewing the document, the ET Leader
shall advise the ER and the Contractor of any non-compliance with the
contractual and legislative requirements on environmental protection and
pollution control for them to take follow-up actions. If the ET Leader's review concludes that the
current status on licence/permit application and any environmental protection
and pollution control preparation works may not cope with the works programme
or may result in potential violation of environmental protection and pollution
control requirements by the works in due course, he shall also advise the
Contractor and the ER accordingly.
10.2.7 Upon receipt of the advice, the Contractor
shall undertake immediate action to remedy the situation. The ER shall follow up to ensure that
appropriate action has been taken by the Contractor in order that the
environmental protection and pollution control requirements are fulfilled.
10.3.1 Complaints shall be referred to the ET
Leader for carrying out complaint investigation procedures. The ET Leader shall undertake the following
procedures upon receipt of the complaints:
(a) log complaint and
date of receipt onto the complaint database;
(b) investigate the
complaint to determine its validity, and to assess whether the source of the
problem is due to works activities;
(c) if a complaint is
valid and due to works, identify mitigation measures;
(d) if mitigation
measures are required, advise the Contractor accordingly;
(e) review the
Contractor's response on the identified mitigation measures, and the updated
situation;
(f) if the complaint is
transferred from
(g) undertake additional
monitoring and audit to verify the situation if necessary, and review that any
valid reason for complaint does not recur;
(h) report the
investigation results and the subsequent actions to the source of complaint for
responding to complainant (If the source of complaint is
(i) record the
complaint, investigation, the subsequent actions and the results in the monthly
EM&A reports.
10.3.2 During the complaint investigation work,
the Contractor and ER shall cooperate with the ET Leader and the IEC in
providing all the necessary information and assistance for completion of the
investigation. If mitigation measures
are identified in the investigation, the Contractor shall promptly carry out
the mitigation measures. The ER shall
ensure that the measures have been carried out by the Contractor. A flow chart of the complaint response
procedures is shown in Figure 10.1. A
sample of the complaint log sheet is provided in Appendix E.
11.1.1
The ET
Leader shall prepare and certify the EM&A Reports in accordance with
following reporting requirements. The following reporting requirements are
based upon a paper documented approach.
However, the same information can be provided in an electronic medium
upon agreeing the format with the ER. This would enable a transition from a
paper/historic and reactive approach to an electronic/real time proactive
approach.
11.2
Baseline
Monitoring Report
11.2.1
The ET
Leader shall prepare and submit a Baseline Environmental Monitoring Report
within 2 weeks of completion of the baseline monitoring. Copies of the Baseline
Environmental Monitoring Report shall be submitted to each of the four parties:
the Contractor, the ER, the IEC and the
11.2.2
The baseline monitoring report shall include at least
the following:-
(a)
Up to half a page executive summary;
(b)
Brief project background information;
(c)
drawings showing locations of the baseline
monitoring stations;
(d) an updated
construction programme with milestones of environmental protection/mitigation
activities annotated;
(e)
monitoring results (in both hard and diskette
copies) together with the following information:
-
monitoring methodology;
-
name of laboratory and types of equipment used and
calibration details;
-
parameters monitored;
-
monitoring locations (and depth); and
-
monitoring date, time, frequency and duration;
-
QA/QC results and detection limits.
(f)
details on influencing factors, including:
-
major activities, if any, being carried out on the
site during the period;
-
weather conditions during the period; and
-
other factors which
might affect the results.
(g)
determination of the Action and Limit Levels for
each monitoring parameter and statistical analysis of the baseline data, the
analysis shall conclude if there is any significant different between control
and impact stations for the parameters monitored;
(h)
revisions for inclusion in the Updated EM&A
Manual, and
(i)
comments and
conclusions.
11.3.1
The results and findings of all EM&A work
required in this EM&A Manual shall be recorded in the monthly EM&A
reports certified by the ET Leader and verified by the IEC. The EM&A report
shall be prepared and submitted within 2 weeks of the end of each reporting
month, with the first report due in the month after construction commences. Six
hard copies of each monthly EM&A report shall be submitted to each of the
five parties: the Employer, the Contractor, the ER, the IEC and
11.3.2
The ET Leader shall review the number and location of
monitoring stations and parameters to be monitored for every 6 months or on as
needed basis in order to cater for the changes in surrounding environment and
nature of works in progress.
11.3.3
The
first monthly EM&A report shall include at least the following:
(a)
1-2 pages executive summary;
-
breaches of Action/Limit levels;
-
Complaint Log;
-
Notifications of any summons and successful
prosecutions;
-
Reporting Changes;
-
Future key issues.
(b)
Basic project information;
-
Project organization including key personnel,
contact names and telephone numbers;
-
Construction Programme with fine tuning of
construction activities showing the inter-relationship with environmental
protection/mitigation measures for the month;
-
Management structure; and
-
Works undertaken during the month;
(c)
Environmental Status
-
Works undertaken during the month with
illustrations (such as location of works, daily dredging/filling rates,
percentage fines in the fill material used) and;
-
Drawing showing the project area, any environmental
sensitive receivers and the locations of the monitoring and control stations.
(d)
Summary of EM&A requirements including:
-
all monitoring parameters;
-
environmental quality performance limits (Action
and Limit levels);
-
Event-Action Plans;
-
environmental mitigation measures, as recommended
in the EIA report;
-
environmental requirements in contract documents;
(e)
Implementation Status
-
advice on the implementation status of
environmental protection and pollution control/mitigation measures, as
recommended in the EIA report, summarized in the updated implementation
schedule;
(f)
Monitoring results (in both hard and diskette
copies) together with the following information;
-
monitoring methodology
-
name of laboratory and types of equipment used and
calibration details
-
parameters monitored
-
monitoring locations (and depth)
-
monitoring date, time, frequency, and duration;
-
weather conditions during the period;
-
graphical plots of the monitored parameters in the
month annotated against;
-
the major activities being carried out on site
during the period;
-
weather conditions that may affect the results;
-
any other factors which might affect the monitoring
results;
-
QA/QC results and detection limits.
(g)
Report on non-compliance, complaints, notifications
of summons and successful prosecutions
-
record of all non-compliance (exceedances) of the
environmental quality performance limits (Action and Limit levels);
-
record of all complaints received (written or
verbal) for each media, including locations and nature of complaints, liaison
and consultation undertaken, actions and follow-up procedures taken, results
and summary;
-
record of all notifications of summons and
successful prosecutions for breaches of the current environmental
protection/pollution control legislations, including locations and nature of
the breaches, investigation, follow-up action taken, results and summary;
-
review of the reasons for and the implications of
non-compliance, complaints, summons and prosecutions including review of
pollution sources and working procedures; and
-
description of the actions taken in the event of
non-compliance and deficiency reporting and any follow-up procedures related to
earlier non-compliance
(h)
Others
-
an account of the future key issues as reviewed
from the works programme and work method statements;
-
advice on the solid and liquid waste management
status; and
-
submission of
implementation status proforma, proactive environmental protection proforma,
regulatory compliance proforma, site inspection proforma, data recovery
schedule and complaint log summarizing the EM&A of the period.
Subsequent Monthly EM&A Reports
11.3.4
The
subsequent monthly EM&A reports shall include the following:
(a)
Executive Summary (1-2 pages)
-
Breaches of Action and Limit levels
-
Complaint Log
-
Notifications of any summons and successful
prosecution
-
Reporting Changes
-
Future key issues
(b)
Environmental Status
-
Construction Programme with fine tuning of construction
activities showing the inter-relationship with environmental
protection/mitigation measures for the month;
-
Works undertaken during the month with illustration
including key personnel contact names and telephone numbers; and
-
Drawing showing the project area, any environmental
sensitive receivers and the locations of the monitoring and control stations
(c)
Implementation Status
Advice
on the implementation status of environmental protection and pollution
control/mitigation measures including measures for ecological and visual
impacts, as recommended in the project EIA study report, summarized in the
updated implementation schedule.
(d)
Monitoring Results
To
provide monitoring results (in both hard and diskette copies) together with the
following information:
-
Monitoring methodology
-
Name of laboratory and types of equipment used and
calibration details
-
Parameters monitored
-
Monitoring locations (and depth)
-
Monitoring date, time, frequency, and duration;
-
Weather conditions during the period;
-
Graphical plots of the monitored parameters in the
month annotated against;
-
The major activities being carried out on site
during the period;
-
Weather conditions that may affect the results;
-
Any other factors which might affect the monitoring
results;
-
QA/QC results and detection limits.
(e)
Report on non-compliance, complaints, notifications
of summons and successful prosecutions
-
Record of all non-compliance (exceedances) of the
environmental quality performance limits (Action and Limit levels);
-
Record of all complaints received (written or
verbal) for each media, including locations and nature of complaints, liaison
and consultation undertaken, actions and follow-up procedures taken, results
and summary;
-
Record of all notifications of summons and
successful prosecutions for breaches of the current environmental
protection/pollution control legislations, including locations and nature of
the breaches, investigation, follow-up action taken, results and summary;
-
Review of the reasons for and the implications of
non-compliance, complaints, summons and prosecutions including review of
pollution sources and working procedures; and
-
A description of the actions taken in the event of
non-compliance and deficiency reporting and any follow-up procedures related to
earlier non-compliance
(f)
Others
-
An account of the future key issues as reviewed
from the works programme and work method statements;
-
Advice on the solid and liquid waste management
status.
(g)
Appendix
-
Action and Limit levels
-
Graphical plots of trends of monitored parameters
at key stations over the past four reporting periods for representative
monitoring stations annotated against the following:
i) major activities being carried out on site
during the period;
ii) weather conditions during the period; and
iii) any other factors which might affect the monitoring results
- Monitoring
schedule for the present and next reporting period
- Cumulative
complaints statistics
- Details
of complaints, outstanding issues and deficiencies
11.4
Quarterly
EM&A Summary Reports
11.4.1
The
quarterly EM&A summary report which should generally be around 5 pages
(including about 3 of text and tables and 2 of figures) should contain at least
the following information. Apart from
these, the first quarterly summary report should also confirm that the
monitoring work is proving effective and that it is generating data with the
necessary statistical power to categorically identify or confirm the absence of
impact attributable to the works:
(a)
up to half a page executive summary;
(b)
basic project information including a synopsis of
the project organization, programme, contacts of key management, and a synopsis
of work undertaken during the quarter;
(c)
a brief summary of EM&A requirements including:
-
monitoring parameters;
-
environmental quality performance limits (Action
and Limit levels); and
-
environmental mitigation measures, as recommended
in the EIA report;
(d)
advice on the implementation status of
environmental protection and pollution control/mitigation measures, as
recommended in the EIA report, summarized in the updated implementation
schedule;
(e)
drawings showing the project area, any
environmental sensitive receivers and the locations of the monitoring and
control stations;
(f)
graphical plots of the trends of monitored
parameters over the past 4 months (the last month of the previous quarter and
the present quarter) for representative monitoring stations annotated against;
-
the major activities being carried out on site
during the period;
-
weather conditions during the period; and
-
any other factors which might affect the monitoring
results;
(g)
advice on the solid and liquid waste management
status;
(h)
a summary of non-compliance (exceedances) of the
environmental quality performance limits (Action and Limit levels);
(i)
a brief review of the reasons for and the
implications of non-compliance including review of pollution sources and
working procedures;
(j)
a quarterly assessment of construction impacts on
water quality at the project site, including, but not limited to, a comparison
of the difference between the quarterly mean and 1.3 times of the ambient mean,
which is defined as 30% increase of the baseline data or
(k)
a summary description of the actions taken in the
event of non-compliance and any follow-up procedures related to earlier
non-compliance;
(l)
a summary record of all complaints received
(written or verbal) for each media, liaison and consultation undertaken,
actions and follow-up procedures taken;
(m)
a summary record of notifications of summons and
successful prosecutions for breaches of the current environmental
protection/pollution control legislations, locations and nature of the
breaches, investigation, follow-up actions taken and results;
(n)
comments (e.g. effectiveness and efficiency of the
mitigation measures), recommendations (e.g. any improvement in the EM&A
programme) and conclusions for the quarter; and
(o)
the Employer’s
contacts and any hotline telephone number the public to make enquiries.
11.5
Final
EM&A Summary Report
11.5.1
The
termination of EM&A programme shall be determined on the following basis:
(a) completion of
construction activities and insignificant environmental impacts of the
remaining outstanding construction works;
(b) trends analysis
to demonstrate the narrow down of monitoring exceedances due to construction
activities and the return of ambient environmental conditions in comparison
with baseline data; and
(c) no environmental complaint and prosecution involved.
11.5.2
The
proposed termination may require to consult relevant
local community such as village representative/committee and/or District
Councils and the proposal should be endorsed by the IEC, ER and the project
proponent prior to final approval from the Director of Environmental
Protection.
11.5.3
The
final EM&A summary report shall include, inter alias, the following:
(a) an executive
summary;
(b) basic project
information including a synopsis of the project organization, programme,
contacts of key management, and a synopsis of work undertaken during the entire
construction period;
(c) a brief summary
of EM&A requirements including:
-
all monitoring parameters;
-
environmental quality performance limits (Action
and Limit levels);
-
Event-Action Plans; and
-
environmental mitigation measures, as recommended
in the project EIA study final report;
(d) advice on the
implementation status of environmental protection and pollution
control/mitigation measures, as recommended in the project EIA study reports,
summarized in the updated implementation status proformas;
(e) drawings showing
the project area, any environmental sensitive receivers and the locations of
the monitoring and control stations;
(f) graphical plots
of the trends of monitored parameters over the construction period for
representative monitoring stations annotated against;
-
the major activities being carried out on Site
during the period;
-
weather conditions during the period;
-
any other factors which might affect the monitoring
results; and
-
the return of ambient environmental conditions in
comparison with baseline data;
(g) compare and
contrast the EM&A data with the EIA predictions and annotate with explanation
for any discrepancies;
(h) provide
clear-cut decisions on the environmental acceptability of the project with
reference to the specific impact hypothesis;
(i)
advice on the solid and liquid waste management
status;
(j) a summary of
noncompliance (exceedances) of the environmental quality performance limits
(Action and Limit levels);
(k) a brief review
of the reasons for and the implications of non-compliance including review of
pollution sources and working procedures;
(l)
a summary description of the actions taken in the
event of non-compliance and any follow-up procedures related to earlier
non-compliance;
(m) a summary record
of all complaints received (written or verbal) for each media, liaison and
consultation undertaken, actions and follow-up procedures taken;
(n) review the
monitoring methodology adopted and with the benefit of hindsight, comment on
its effectiveness (including cost effectiveness);
(o) a summary record
of notifications of summons and successful prosecutions for breaches of the
current environmental protection/pollution control legislations, locations and
nature of the breaches, investigation, follow-up actions taken and results;
(p) review the
practicality and effectiveness of the EIA process and EM&A programme (e.g.
effectiveness and efficiency of the mitigation measures), recommend any
improvement in the EM&A programme ; and
(q) a conclusion to state the return of ambient and/or
the predicted scenario as per EIA findings.
11.6.1
The
site document such as the monitoring field records, laboratory analysis records,
site inspection forms, etc. are not required to be included in the monthly
EM&A reports for submission.
However, the document shall be well kept by the ET Leader and be ready
for inspection upon request. All
relevant information shall be clearly and systematically recorded in the
document. The monitoring data shall also
be recorded in magnetic media form, and the software copy can be available upon
request. All the documents and data
shall be kept for at least one year after completion of the Contract.
11.7
Interim
Notifications of Environmental Quality Limit Exceedances
11.7.1
The
site document such as the monitoring field records, laboratory analysis
records, site inspection forms, etc. are not required to be included in the
monthly EM&A reports for submission.
However, the document shall be well kept by the ET Leader and be ready
for inspection upon request. All
relevant information shall be clearly and systematically recorded in the
document. The monitoring data shall also
be recorded in magnetic media form, and the software copy can be available upon
request. All the documents and data
shall be kept for at least one year after completion of the Contract.
11.7.2
With
reference to Event/Action Plans in Tables 2.3, 3.3 and 4.5, when the
environmental quality limits are exceeded, the ET Leader shall immediately
notify the ER, the IEC, and
11.8
Electronic
Reporting of EM&A Information
11.8.1
To
facilitate public inspection of the monthly EM&A Reports via the EIAO
Internet Website and at the EIAO Register Office, electronic copies of these
Reports shall be prepared in Hyper Text Markup Language (HTML) (version 4.0 or
later) and in Portable Document Format (PDF version 4.0 or later) unless
otherwise agreed by
11.8.2
The Contractor shall establish a
website and the
environmental monitoring data on air, noise
and water quality shall be made available to the public via
internet access in the form of a website, in the shortest possible time and in
no event later than 2 weeks after the relevant environmental monitoring data
are collected or become available, unless otherwise agreed with
11.8.3
The
internet website as described in Section 11.8 above shall enable user-friendly public access
to the monitoring data with features capable of:
(a)
providing access to all environmental monitoring
data collected since the commencement of works;
(b)
searching by date;
(c)
searching by types of monitoring data (air quality
and noise);
(d)
searching by monitoring stations; and
(e)
providing hyperlinks to relevant monitoring data
after searching,
or otherwise as agreed by
11.8.4 The ET shall incorporate the Baseline
Monitoring Report in the internet website described in Section 11.8 above.
[1] The
catchment is enclosed by the ridgelines running between Jardines Lookout in the
east through