1.1.1
This Contract Specific Environmental Monitoring
and Audit (EM&A) Manual is prepared for Contract HY/2011/03 Hong Kong-Zhuhai-Macao
Bridge (“HKZMB”) Hong Kong Link Road – Section between Scenic Hill and Hong
Kong Boundary Facilities (“the Contract”) for the Highways Department of
HKSAR. The Contract was awarded to China
State Construction Engineering (Hong Kong) Limited (“the Contractor”) and BMT
Asia Pacific was appointed as the Environmental Team by the Contractor.
1.1.2
The Contract is part of the Hong Kong – Zhuhai –
Macao Bridge Hong Kong Link Road (“HKLR”) Project and Hong Kong – Zhuhai –
Macao Bridge Hong Kong Boundary Crossing Facilities (HKBCF) Project, these
projects are considered to be “Designated Projects”, under Schedule 2 of the
Environmental Impact Assessment (EIA) Ordinance (Cap 499) and Environmental
Impact Assessment (EIA) Reports (Register No. AEIAR-144/2009 and
AEIAR-145/2009) were prepared for the Project.
The current Environmental Permit (EP) EP-352/2009/A for HKLR and
EP-353/2009/E for HKBCF were issued on 31 October 2011 and 16 October 2012,
respectively. These documents are available through the EIA Ordinance
Register.
1.1.3
This Contract Specific EM&A Manual is to
fulfill Clause 8.2.3 of the Employer’s Requirements of Contract No. HY/2011/03
to include all contract-related contents from the EM&A Manuals approved
under the EIAO for Hong Kong Link Road and HKBCF. The Site Area of the Contract is shown in Figure
1.
1.2.1
This Contract Specific EM&A Manual outlines
the monitoring and audit programme to be undertaken during the course of the
construction works specific to Contract No. HY/2011/03. It aims to provide systematic procedures for
monitoring, auditing and minimization of the environmental impacts associated
with the construction works. The purpose
of this EM&A Manual is:
l to guide the set up of an EM&A
programme to ensure compliance with the EIA recommendations;
l to specify the requirements for
monitoring equipment;
l to propose environmental monitoring
points, monitoring frequency etc.;
l to propose Action/Limit Level; and
l to propose Event/Action Plan.
1.2.2
Hong Kong environmental regulations and the Hong
Kong Planning Standards and Guidelines (HKPSG) have served as environmental
standards and guidelines in the preparation of this Manual. In addition, this Contract Specific EM&A
Manual has been prepared in accordance with the requirements stipulated in
Annex 21 of the Technical Memorandum on the EIA Process (TM-EIAO).
1.2.3
This Manual contains the following information:
l Responsibilities of the Contractor,
the Supervising Officer (SO), Environmental Team (ET), and the Independent
Environmental Checker (IEC) with respect to the EM&A requirements;
l Role of the Environmental Protection
Office (ENPO);
l Project organization for the EM&A
works;
l Programming of construction activities
for the Contract;
l The basis for, and description of the
broad approach underlying the EM&A programme;
l Requirements with respect to the
construction schedule and the necessary EM&A programme to track the varying
environmental impacts;
l Details of the methodologies to be
adopted, including all laboratories and analytical procedures, and details on
quality assurance and quality control programme;
l The rationale on which the
environmental monitoring data will be evaluated and interpreted;
l Definition of Action and Limit levels;
l Establishment of Event and Action
plans;
l Requirements for reviewing pollution
sources and working procedures required in the event of non-compliance with the
environmental criteria and complaints; and
l Requirements for presentation of
environmental monitoring and audit data and appropriate reporting procedures.
1.2.4
As the HKLR project has been split into two
contracts, the environmental monitoring locations as required in the updated
EM&A Manual for HKLR (Version 1.0) are not all relevant to the
Contract. According to the requirements
provided in the contract document, the following environmental monitoring will
be undertaken for the Contract and form part of the EM&A Programme:
|
Environmental
Monitoring
|
Locations
|
|
Air
Quality
|
AMS5 and
AMS6
|
|
Noise
|
NMS5
|
|
Water
Quality
|
IS5, IS(Mf)6, IS7, IS8, IS(Mf)9, IS10, SR3, SR4, SR5, SR10A, SR10B, CS2 and
CS(Mf)5
|
|
Chinese
White Dolphin
|
Northeast Lantau and
Northwest Lantau
|
|
Mudflat
|
Intertidal soft shore
habitats in San Tau and Tung Chung Bay
|
|
Coral
|
Pre-construction
dive survey for corals along the shore of the HKLR reclamation site.
|
1.2.5
For the purpose of this manual, the SO shall
refer to the Supervising Officer as defined in the Construction Contract, in cases
where the SO’s powers have been delegated to the Supervising Officer’s
Representative (“SOR”), in accordance with the Construction Contract. The responsibilities of the SO are the same
as those of the Engineer defined in the EM&A Manual for the HKLR. The Environmental Team Leader (ETL), who
shall be responsible for and in charge of the ET, shall refer to the person
delegated the role of executing the environmental monitoring and audit
requirements.
1.2.6
Sections 5 – 16 of this manual have been
reference to the numbering system of the Updated EM&A Manual for HKLR
(Version 1.0) for ease of reference.
2.1.1
The Works under this Contract comprises the
design and construction for the section of HKLR between Scenic Hill and Hong
Kong Boundary Crossing Facilities, including the following:-
l
New
reclamation along the east coast of the Hong Kong International Airport (HKIA),
of approximately 23 hectares;
l
A
tunnel (hereinafter referred to as Tunnel SHT) from Scenic Hill to the new
reclamation, of approximately 1 kilometre in length with 3 lanes for eastbound
carriageway heading to the HKBCF and 4 lanes for westbound carriageway heading
to the HZMB Main Bridge;
l
An
abutment of the viaduct portion of the HKLR at the west portal of Tunnel SHT
and associated roadworks at west portal of Tunnel SHT;
l
An
at-grade road on the new reclamation along the east coast of the HKIA to
connect with the Hong Kong Boundary Crossing Facility (“HKBCF”), of
approximately 1.6 km along dual 3-lane carriageway with hard shoulder for each
bound;
l
Roadlinks
between the HKBCF and the HKIA including new roads and modification of existing
roads in the HKIA, involving viaducts, at-grade roads and a tunnel (hereinafter
referred to as Tunnel HAT);
l
A
highway operation and maintenance area (hereinafter referred to as HMA) located
on the new reclamation at south of Dragonair Headquarters Building, including
construction of buildings, connection roads and other associated facilities;
l
Associated
civil, structural, building, geotechnical, marine, environmental protection,
landscaping, drainage and sewerage, tunnel and highway electrical and
mechanical works, together with installation of street lightings, traffic aids
and sign gantries, water mains and fire hydrants, provision of facilities for
installation of traffic control and surveillance system (TCSS), reprovisioning
works of affected existing facilities, implementation of transplanting,
compensatory planting and protection of existing trees, and implementation of
an environmental monitoring and audit (EM&A) programme.
2.2.1
Appendix
A illustrates the tentative construction programme for the Project. All the key construction activities are shown
with the tentative dates for commencement and completion.
2.2.2
All necessary mitigation measures have been
identified and recommended in the original EM&A Manuals approved under the
EIAO for HKLR and HKBCF.
2.2.3
The mitigation measures which are applicable to
the works under this Contract were extracted from Environmental Mitigation
Implementation Schedule (EMIS) in the original EM&A Manuals and are given
in Appendix B. It specifies the extent, locations, time
frame and responsibilities for the implementation of the environmental
mitigation measures identified.
2.3.1
Construction of HKLR commenced in Year 2012 and
scheduled to open in Year 2016.
2.3.2
The advance works of Tuen Mun Check Lap Kok
Link, i.e. reclamation works of the southern landfall of the TMCLKL sub-sea
tunnel commenced in late 2011. The
southern connection of the TMCLKL was scheduled to complete in 2016 to tally
with the commissioning of the HZMB, and to complete the northern connection in
2017.
2.3.3
The Main Bridge of the HZMB within the Guangdong
water would also be concurrent with the construction of HKBCF and southern
landfall of TMCLKL. The tentative commissioning date is also 2015.
2.3.4
Another concurrent project during the
construction of HKBCF and southern landfall of TMCLKL is the 72 ha reclamation
for Lantau Logistics Park. This has been considered as a concurrent project in
the EIA.
3.1.1
The proposed project organization and lines of
communication with respect to environmental protection works are shown in Appendix C.
3.1.2
The ETL shall be an independent party from the
Contractor and has relevant professional qualifications, and have at least 7
years of experience in conducting EM&A projects subject to approval of the
SO and EPD.
3.2.1
The role and responsibility of the Contractor
are provided below:
l
employ
an ET to undertake monitoring, laboratory analysis and reporting of
environmental monitoring and audit;
l
provide
assistance to ET in carrying out monitoring and auditing;
l
submit
proposals on mitigation measures in case of exceedances of Action and Limit
levels in accordance with the Event and Action Plans;
l
implement
measures to reduce impact where Action and Limit levels are exceeded; and
l
adhere
to the agreed procedures for carrying out complaint investigation.
3.3.1
The ET is to be appointed by the
Contractor. The role and
responsibilities of the ET are provided below:
l
set
up all the required environmental monitoring stations;
l
monitor
various environmental parameters as required in the EM&A Manual;
l
analyze
the environmental monitoring and audit data and review the success of EM&A
programme to cost-effectively confirm the adequacy of mitigation measures
implemented and the validity of the EIA predictions and to identify any adverse
environmental impacts arising;
l
carry
out site inspection to investigate and audit the Contractors' site practice,
equipment and work methodologies with respect to pollution control and
environmental mitigation, and take proactive actions to pre-empt problems;
l
audit
and prepare audit reports on the environmental monitoring data and site
environmental conditions;
l
report on
the environmental monitoring
and audit results
to the IEC, Contractor, the SO and EPD or its
delegated representative;
l
recommend
suitable mitigation measures to the Contractor in the case of exceedance of
Action and Limit levels in accordance with the Event and Action Plans;
l
undertake
regular on-site audits/inspections and report to the Contractor and the SO of
any potential non-compliance; and
l
follow
up and close out non-compliance actions.
3.4
Supervising Officer or Supervision Officer’s Representative
3.4.1
The role and responsibilities of the SO or SOR
are provided below:
l
supervise
the Contractor’s activities and ensure that the requirements in the EM&A
Manual are fully complied with;
l
inform
the Contractor when action is required to reduce impacts in accordance with the
Event and Action Plans;
l
employ
an IEC to audit the results of the EM&A works carried out by the ET; and
l
comply
with the agreed Event Contingency Plan in the event of any exceedance.
3.5.1
An IEC will be responsible for the environmental
auditing works. The role and
responsibilities of the IEC are provided below:
l
review
the EM&A works performed by the ET (at not less than monthly intervals);
l
audit
the monitoring activities and results (at not less than monthly intervals);
l
report
the audit results to the SO and EPD in parallel;
l
review
the EM&A reports (monthly and quarterly summary reports) submitted by the
ET;
l
review
the proposal on mitigation measures submitted by the Contractor in accordance
with the Event and Action Plans;
l
check
the mitigation measures that have been recommended in the EIA and this Manual,
and ensure they are properly implemented in a timely manner, when necessary;
and
l
report
the findings of site inspections and other environmental performance reviews to
SO and EPD.
3.6.1
Notwithstanding the above, given that the
TMCLKL, HKBCF and HKLR will be constructed concurrently, an ENPO or equivalent
to oversee the cumulative construction projects in North Lantau area will be
established by the Project Proponent. The responsibility of the ENPO
would be similar to that of the IEC but should also include:
l
coordinate
the monitoring and auditing works for all the on-going projects in the area in
order to identify possible sources/causes of exceedances and recommend suitable
remedial actions where appropriate;
l
review
cumulative impacts including possible sources/causes of exceedance and
recommending suitable remedial actions;
l
liaise
with the mainland project teams for HZMB Main Section to identify and assess
any cross-boundary cumulative impacts in order to establish suitable remedial
actions where necessary; and
l
coordinate
the assessment and response to complaints/enquires from locals, green groups,
district councils or the public at large.
3.6.2
The exact responsibilities and organisation of
the ENPO have been defined by the Project Proponent in accordance with the
relevant Environmental Permits.
3.6.3
Sufficient and suitably qualified professional
and technical staff shall be employed by the respective parties to ensure full
compliance with their duties and responsibilities, as required under the
EM&A programme for the duration of the Project.
4
Environmental Submissions
4.1.1
The Contractor shall prepare relevant
environmental submissions (including statutory submissions) as required under
the Environmental Permit EP-352/2009/A and EP-353/2009/E, and the approved
EM&A Manuals covered by the EP, and obtain approval from SO, IEC, EPD and
other relevant authorities to encompass the recommended environmental
protection / mitigation measures with respect to their latest construction
methodology and programme.
4.1.2
Statutory submissions required under
EP-352/2009/A include:
l
Dolphin
Watching Plan;
l
Acoustic
Decoupling Measures Plan;
l
Coral
Translocation Methodology;
l
Spill
Response Plan;
l
Regular
Marine Vessels Travel Routes;
l
Emergency
Response Plan for Tank Farm;
l
Landscape
and Visual Plan;
l
Waste
Management Plan; and
l
Emergency
Response Plan for Spillage of Oil and Chemicals.
4.1.3
As the Contract only involves the construction
of roadlinks between the proposed HKBCF and Hong Kong International Airport,
relevant statutory submissions required under EP-353/2009/E are:
l
Landscape and Visual Plan; and
l
Waste
Management Plan.
4.1.4
Environmental submissions required under the
EM&A Manuals include:
l
Environmental
Management Plan;
l
Site
Drainage Management Plan;
l
Silt
Curtain Performance Pilot Test Plan; and
l
Ecological Monitoring Plan.
Dolphin
Watching Plan
4.2.1
The Dolphin Watching Plan shall include details
on regular inspection of the silt curtains, visual inspection of the waters
surrounded by the curtains, and an action plan to cope with any unpredicted
incidents such as the case that Chinese White Dolphin (CWD) is found within the
water surrounded by the silt curtains.
4.2.2
The Dolphin Watching Plan is required under
Clause 2.5 of the EP-352/2009/A.
Acoustic
Decoupling Measures Design
4.2.3
The Contractor shall prepare the design and
implementation of acoustic decoupling measures to be applied during bored piling
and reclamation works.
4.2.4
The design of acoustic decoupling measures is
required under Clause 2.6 of the EP-352/2009/A.
Coral
Translocation Methodology
4.2.5
A detailed coral translocation methodology shall
be prepared, including pre-translocation survey, identification of receiving
sites and post-translocation monitoring.
4.2.6
The detailed coral translocation methodology is
required under Clause 2.7 of the EP-352/2009A.
Spill
Response Plan
4.2.7
A Spill Response Plan detailing the actions to be
taken in the event of accidental spillage of oil or other hazardous chemicals
from construction activities including vessels operating for the Project, with
specific provisions for protecting marine ecology and the Chinese White Dolphin
(CWD) shall be prepared.
4.2.8
The Spill Response Plan is required under Clause
2.8 of the EP-352/2009A.
Regular
Marine Vessels Travel Routes
4.2.9
To minimize the chance of vessel collision and
the disturbance to the Chinese White Dolphin (CWD), a plan showing the regular
marine travel routes of vessels moving to and from the Project work sites shall
be prepared. Any subsequent changes to
the regular routes shall be verified by the IEC as conforming to the
requirements in the EIA Report.
4.2.10
The marine vessels travel routes plan is required
under Clause 2.9 of the EP-352/2009A.
4.3.1
An emergency response plan to minimize death and
damages due to accidents at the tank farm shall be prepared. The emergency response plan shall at least
detail the emergency response procedures including evacuation, logistics and
notification arrangement in the event of fire, fuel spillage and fuel leakage
at the tank farm.
4.3.2
The emergency response plan is required under
Clause 2.10 of the EP-352/2009A.
4.4.1
A landscape and visual plan incorporating
measures, including aesthetic design on the tunnel portals, at-grade roads and
reclamation and visually neutral/recessive colour scheme for construction of
offshore structures and night-time lighting control shall be prepared.
4.4.2
The landscape and visual plan is required under
Clause 2.11 of the EP-352/2009A and Clause 2.9 of the EP-353/2009/E.
4.5.1
The Contractor shall include a Waste Management
Plan (WMP) for the construction of the project and submit to the SO, IEC and
EPD for approval. Where waste generation
is unavoidable, the opportunities for recycling or reusing should be
maximized. If wastes cannot be recycled,
recommendations for appropriate disposal routes should be provided in the WMP. A method statement for stockpiling and
transportation of the excavated materials and other construction wastes should
also be included in the WMP and approved before the commencement of
construction. All mitigation measures
arising from the approved WMP shall be fully implemented.
4.5.2
For the purpose of enhancing the management of
Construction and Demolition (C&D) materials including rock, and minimising
its generation at source, construction would be undertaken in accordance with
the Environment, Transport and Works Bureau Technical Circular (Works) No.
33/2002 - Management of Construction and Demolition Material Including Rock, or
its latest versions. The management
measures stipulated in the Technical Circular should be incorporated into the
WMP.
4.5.3
The WMP is required under Clause 2.12 of the
EP-352/2009/A and Clause 2.10 of the EP-353/2009/E.
4.6.1
An Emergency Response Plan on how to prevent oil
and chemical spillages caused by traffic incidents on the carriageway from
entering into the waterbody during operation shall be prepared.
4.6.2
The Emergency Response Plan for Spillage of Oil
and Chemicals is required under Clause 3.16 of the EP-352/2009A.
4.7.1
In case the Contractor would like to adopt
alternative construction methods or implementation schedules, it is required to
submit details of methodology and equipment to the SO for approval before the
work commences. Any changes in
construction method shall be reflected in a revised EMP or the Contractor will
be required to demonstrate the manner in which the existing EMP should
accommodate the proposed changes. The
Contractor may need to apply for a Further Environmental Permit (FEP) from EPD
before commencement of any construction
activities.
4.8
Environmental Management Plan
4.8.1
A systematic Environmental Management Plan (EMP)
shall be set up by the Contractor to ensure effective implementation of the
mitigation measures, monitoring and remedial requirements presented in the EIA,
EM&A and EMIS. The SO and the IEC
will audit the implementation status against the EMP and advise the necessary
remedial actions required. These remedial
actions shall be enforced by the SO through contractual means.
4.8.2
The EMP will define in details how the
Contractor (together with its sub-contractors) implements the recommended
mitigation measures in order to achieve the environmental performance defined
in the Hong Kong environmental legislation and the EIA documentation.
4.8.3
The review of on-site environmental performance
shall be undertaken by SO and IEC through a systematic checklist and audit once
the construction commences. The environmental performance review programme
comprises a regular assessment on the effectiveness of the EMP. Reference should be made to Environment,
Transport and Works Bureau Technical Circular (Works) No. 19/2005
“Environmental Management on Construction Sites” or its latest versions, and
any other relevant Technical Circulars.
4.8.4
The EMP is required under Clause 8.8.1 of the
Employer’s Requirements Part 8.
4.9
Site Drainage Management Plan
4.9.1
A detailed site drainage management plan should
cover measures to minimize all potential water quality impact arising from the
surface runoffs of all the related constructions.
4.9.2
The detailed site drainage management plan is
required under Clause 9.1.2 of the EM&A Manual.
4.10
Silt Curtain Performance Pilot Test Plan
4.10.1
The ET shall be responsible for conducting tests
to confirm that their silt curtain systems to be adopted would satisfy the
requirements in the EIA Report.
4.10.2
A method statement detailing the pilot test of
silt removal efficiency of the floating type silt curtains shall be submitted
by the ET Leader to seek approval from the IEC and EPD.
4.10.3
The pilot tests should be carried out during the
early stage of construction to confirm whether the silt removal efficiency of
the floating type silt curtains can achieve 45% silt removal efficiency for
filling activity when deployed, and a combined reduction of 61% when the two
layers of floating type silt curtains are used.
4.10.4
Regardless of the measured efficiency of the
silt curtain system, the event and action plan shall only be based on the
monitoring results at the designed monitoring stations.
4.11.1
An ecological monitoring plan for mudflat
baseline, impact and post-construction monitoring shall be submitted to AFCD
and EPD for approval prior to the baseline monitoring. The mudflat monitoring shall cover the
intertidal soft shore habitats in San Tau and Tung Chung Bay where horseshoe
crab juveniles and seagrass beds have been sighted.
4.11.2
Baseline monitoring shall be undertaken prior to
the commencement of works and quarterly during the construction period. The post-construction monitoring for mudflat
shall be undertaken for at least 2 years after the completion of
construction.
5.1.1
Monitoring and audit of the Total Suspended
Particulates (TSP) levels shall be carried out by the ET to ensure that any
deteriorating air quality could be readily detected and timely action taken to
rectify the situation.
5.1.2
One-hour and 24-hour TSP levels should be
measured to indicate the impacts of construction dust on air quality. The 24-hour TSP levels shall be measured by
following the standard high volume sampling method as set out in the Title 40
of the Code of Federal Regulations, Chapter 1 (Part 50), Appendix B. Upon approval of the IEC, 1-hour TSP levels
can be measured by direct reading methods which are capable of producing
comparable results as that by the high volume sampling method, to indicate
short event impacts.
5.1.3
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 any other
local atmospheric factors affecting or affected by site conditions, etc., shall
be recorded down in detail. A sample
data sheet is shown in Appendix
D.
5.2.1
High volume samplers (HVSs) complying with the
following specifications shall be used for carrying out the 1-hour and 24-hour
TSP monitoring:
a)
0.6 - 1.7 m3 per minute
adjustable flow range;
b)
equipped with a timing / control device
with +/- 5 minutes accuracy for 24 hours operation;
c)
installed with elapsed-time meter with
+/- 2 minutes accuracy for 24 hours operation;
d)
capable of providing a minimum exposed
area of 406 cm2;
e)
flow control accuracy: +/- 2.5%
deviation over 24-hour sampling period;
f)
equipped with a shelter to protect the
filter and sampler;
g)
incorporated with an electronic mass
flow rate controller or other equivalent devices;
h)
equipped with a flow recorder for
continuous monitoring;
i)
provided with a peaked roof inlet;
j)
incorporated with a manometer;
k)
able to hold and seal the filter paper
to the sampler housing at horizontal position;
l)
easily changeable filter; and
m)
capable of operating continuously for a
24-hour period.
5.2.2
The ET is responsible for the provision,
installation, operation, maintenance, dismantling of the monitoring
equipment. They shall ensure that
sufficient number of HVSs with an appropriate calibration kit is available for
carrying out the baseline monitoring, 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.
5.2.3
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 concern parties
such as IEC shall properly document the calibration data for future
reference. All the data should be
converted into standard temperature and pressure condition.
5.2.4
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 data sheet as mentioned in Appendix D.
5.2.5
If the ET proposes to use a direct reading dust
meter to measure 1-hour TSP levels, he shall submit sufficient information to
the IEC to prove that the instrument is capable of achieving a comparable
result to the HVS. The instrument should
also be calibrated regularly, and the 1-hour sampling shall be determined
periodically by the HVS to check the validity and accuracy of the results
measured by direct reading method.
5.2.6
Wind data monitoring equipment shall also be
provided and set up set up for logging wind speed and wind direction near the
dust monitoring locations. The equipment
installation location shall be proposed by the ET and agreed with the IEC. For installation and operation of wind data
monitoring equipment, the following points shall be observed:
a)
The wind sensors should be installed 10
m above ground so that they are clear of obstructions or turbulence caused by
buildings.
b)
The wind data should be captured by a
data logger. The data shall be
downloaded for analysis at least once a month.
c)
The wind data monitoring equipment
should be re-calibrated at least once every six months.
d)
Wind direction should be divided into
16 sectors of 22.5 degrees each.
5.2.7
In exceptional situations, the ET may propose
alternative methods to obtain representative wind data upon approval from the
SO and agreement from the IEC.
5.3.1
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 should be
HOKLAS accredited.
5.3.2
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 SO and the measurement procedures
shall be witnessed by the IEC. Any
measurement performed by the laboratory shall be demonstrated to the
satisfaction of the SO and IEC. IEC
shall regularly audit to the measurement performed by the laboratory to ensure
the accuracy of measurement results. The
ET Leader shall provide the SO with one copy of the Title 40 of the Code of
Federal Regulations, Chapter 1 (Part 50), Appendix B for his reference.
5.3.3
Filter paper of size 8" x 10" shall be
labelled before sampling. It shall be a
clean filter paper with no pinholes, and shall be conditioned in a humidity-controlled
chamber for over 24-hours and be pre-weighed before use for the sampling.
5.3.4
After sampling, the filter paper loaded with
dust shall be kept in a clean and tightly sealed plastic bag. The filter paper shall then be returned to
the laboratory for reconditioning in the humidity-controlled chamber followed
by accurate weighing by an electronic balance with readout down to 0.1 mg. The balance shall be regularly calibrated
against a traceable standard.
5.3.5
All the collected samples shall be kept in a
good condition for 6 months before disposal.
5.4.1
Figure 2
shows the locations of the proposed dust monitoring station for the Contract.
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 and seek approval from SO and
agreement from the IEC.
Table 5.1 Construction Dust Monitoring
Locations
|
ID
|
Location
Description
|
|
AMS 5
|
Ma Wan Chung Village (Tung Chung)
|
|
AMS 6
|
Dragonair / CNAC (Group) Building (HKIA)
|
5.4.2
When alternative monitoring locations are
proposed, the proposed site should, as far as practicable:
a)
be at the site boundary or such
locations close to the major dust emission
source;
b)
be close to the
sensitive receptors; and
c)
take into account
the prevailing meteorological conditions.
5.4.3
The ET shall agree with the SO in consultation
with the IEC on the position of the HVS for the installation of the monitoring
equipment. When positioning the
samplers, the following points shall be noted:
a)
a horizontal
platform with appropriate support to secure the samplers against gusty wind
should be provided;
b)
no two samplers
should be placed less than 2 meters apart;
c)
the distance
between the sampler and an obstacle, such as buildings, must be at least twice
the height that the obstacle protrudes above the sampler;
d)
a minimum of 2
meters of separation from walls, parapets and penthouses is required for
rooftop samplers;
e)
a minimum of 2
meters separation from any supporting structure, measured horizontally is
required;
f)
no furnace or
incinerator flue is nearby;
g)
airflow around the
sampler is unrestricted;
h)
the sampler is
more than 20 meters from the dripline;
i)
any wire fence and
gate, to protect the sampler, should not cause any obstruction during
monitoring;
j)
permission must be
obtained to set up the samplers and to obtain access to the monitoring
stations; and
k)
a secured supply
of electricity is needed to operate the samplers.
5.4.4
The ENPO may, depending on site conditions and
monitoring results, decide whether additional monitoring locations shall be
included or any monitoring locations could be removed/ relocated during any
stage of the construction phase.
5.5.1
Baseline monitoring shall be carried out at all
of the designated monitoring locations (see Table 5.1) for at least 14
consecutive days prior to the commissioning of major construction works to
obtain daily 24-hour TSP samples. The selected baseline monitoring stations should
reflect baseline conditions at the impact stations. One-hour sampling should also be done at
least 3 times per day while the highest
dust impact is expected.
5.5.2
During the baseline monitoring, there should not
be any major construction or dust generation activities in the vicinity of the
monitoring stations. Before commencing
baseline monitoring, the ET shall inform the IEC of the baseline monitoring programme
such that, if required, the SO can conduct on-site audit to ensure accuracy of
the baseline monitoring results.
5.5.3
In case the baseline monitoring cannot be
carried out at the designated monitoring locations, the ET Leader shall carry
out the monitoring at alternative locations that can effectively represent the
baseline conditions at the impact monitoring locations. The alternative baseline monitoring locations
shall be approved by the SO and agreed with
the IEC.
5.5.4
In exceptional cases, when insufficient baseline
monitoring data or questionable results are obtained, the ET shall liaise with
the IEC and EPD to agree on an appropriate set of data to be used as a baseline
reference and submit to SO for approval.
5.5.5
Ambient conditions may vary seasonally and shall
be reviewed once every three months.
When the ambient conditions have changed and a repeat of the baseline
monitoring is required to be carried out for obtaining the updated baseline
levels, the monitoring should be at times when the Contractor's activities are
not generating dust, at least in the proximity of the monitoring stations. Should change 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 the IEC and EPD.
5.6.1
The ET shall carry out impact monitoring during
the entire construction period. For
regular impact monitoring, the sampling frequency of at least once in every 6 days,
shall be strictly observed at all the monitoring stations for 24-hour TSP
monitoring. For 1-hour TSP monitoring,
the sampling frequency of at least 3 times in every 6 days should be undertaken
when the highest dust impact occurs. Before commencing impact monitoring,
the ET shall inform the IEC of the impact monitoring programme such that the
IEC can conduct on-site audit to ensure accuracy of the monitoring results.
5.6.2
The specific time to start and stop the 24-hour
TSP monitoring shall be clearly defined for each location and be strictly
followed by the ET.
5.6.3
In case of non-compliance with the air quality
criteria, more frequent monitoring, as specified in the Action Plan in the
following section, shall be conducted within the specified timeframe after the
result is obtained. This additional
monitoring shall be continued until the excessive dust emission or the
deterioration in air quality is rectified,
and agreed with the SO and the IEC.
5.7.1
The baseline monitoring results form the basis
for determining the air quality criteria for the impact monitoring. The ET shall compare the impact monitoring
results with air quality criteria set up for 24-hour TSP and 1-hour TSP. Table 5.2 shows the air quality
criteria, namely Action and Limit levels to be used.
Table 5.2 Action and Limit
Levels for Air Quality
|
Parameter
|
Action Level
|
Limit Level
|
|
24-hour TSP Level in µg/m3
|
For baseline level ≤ 200 µ/m3, Action
level = (baseline level * 1.3 + Limit level)/2;
For baseline level ≤ 200 µ/m3,
Action level = Limit Level
|
260 µg/m3
|
|
1-hour TSP Level in µg/m3
|
For baseline level ≤ 384 µ/m3,
Action level = (baseline level * 1.3 + Limit level)/2;
For baseline level ≤ 384 µ/m3, Action level = Limit Level
|
500 µg/m3
|
5.8.1
Should non-compliance of the air quality
criteria occur, actions in accordance with the Action Plan in
Table 5.3 shall be carried out.
Table 5.3 Event and Action Plan for Air Quality
|
Event
|
Action
|
|
ET
|
IEC
|
SO
|
Contractor
|
|
Exceedance of Action Level for one sample
|
1. Identify source, investigate the causes of exceedance and
propose remedial measures;
2. Inform IEC and SO;
3. Repeat measurement to confirm finding;
4. Increase monitoring frequency to daily.
|
1. Check monitoring data submitted by ET;
2. Check Contractor’s working method.
|
1. Notify Contractor.
|
1. Rectify any unacceptable practice;
2. Amend working methods if appropriate.
|
|
Exceedance of Action Level for two or more consecutive samples
|
1. Identify source;
2. Inform IEC and SO;
3. Advise the SO on the effectiveness of the proposed remedial
measures;
4. Repeat measurements to confirm findings;
5. Increase monitoring frequency to daily;
6. Discuss with IEC and Contractor on remedial
actions required;
7. If exceedance continues, arrange meeting with IEC and SO;
8. If exceedance stops, cease additional monitoring.
|
1. Check monitoring data submitted by ET;
2. Check Contractor’s working method;
3. Discuss with ET and Contractor on possible remedial measures;
4. Advise the ET on the effectiveness of the proposed remedial
measures;
5. Supervise Implementation of remedial measures.
|
1. Confirm receipt of notification of failure in writing;
2. Notify Contractor;
3. Ensure remedial measures properly implemented.
|
1. Submit proposals for remedial to SO within 3 working days of
notification;
2. Implement the agreed proposals;
3. Amend proposal if appropriate.
|
|
Exceedance of Limit Level for one sample
|
1. Identify source, investigate the causes of exceedance and
propose remedial measures;
2. Inform SO, Contractor and EPD;
3. Repeat measurement to confirm finding;
4. Increase monitoring frequency to daily;
5. Assess effectiveness of Contractor’s remedial actions and keep
IEC, EPD and SO informed of the results.
|
1. Check monitoring data submitted by ET;
2. Check Contractor’s working method;
3. Discuss with ET and Contractor on possible remedial measures;
4. Advise the SO on the effectiveness of the proposed remedial
measures;
5. Supervise implementation of remedial measures.
|
1. Confirm receipt of notification of failure in writing;
2. Notify Contractor;
3. Ensure remedial measures properly implemented.
|
1. Take immediate action to avoid further exceedance;
2. Submit proposals for remedial actions to IEC within 3 working
days of notification;
3. Implement the agreed proposals;
4. Amend proposal if appropriate.
|
|
Exceedance of Limit Level for two or more consecutive samples
|
1. Notify IEC, SO, Contractor and EPD;
2. Identify source;
3. Repeat measurement to confirm findings;
4. Increase monitoring frequency to daily;
5. Carry out analysis of Contractor’s working procedures to
determine possible mitigation to be implemented;
6. Arrange meeting with IEC and SO to discuss the remedial actions
to be taken;
7. Assess effectiveness of Contractor’s remedial actions and keep
IEC, EPD and SO informed of the results;
8. If exceedance stops, cease additional monitoring.
|
1. Discuss amongst SO, ET, and Contractor on the potential remedial
actions;
2. Review Contractor’s remedial actions whenever necessary to
assure their effectiveness and advise the SO accordingly;
3. Supervise the implementation of 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 measures 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 IEC 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 SO until
the exceedance is abated.
|
5.9.1
The EIA Report has recommended dust control
measures including 8 times of watering per day.
Good site practices such as road surface paving, dust enclosures, wheels
wash facilities would be implemented to reduce the generation of dust.
5.9.2
All the proposed mitigation measures are
summarised in the Environmental Mitigation Implementation Schedule (EMIS) in Appendix B.
6.1.1
Construction noise level 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 07:00 and 19:00 hours on normal
weekdays. For all other time periods, Leq
5 min shall be employed for comparison with the Noise Control Ordinance
(NCO) criteria.
6.1.2
As supplementary information for data auditing,
statistical results such as L10 and L90 shall also be
obtained for reference.
6.2.1
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 level from before and after the noise
measurement agrees to within 1.0 dB.
6.2.2
Noise measurements should be made in accordance
with standard acoustical principles and practices in relation to weather
conditions.
6.2.3
The ET is responsible for the provision,
installation, operation, maintenance, dismantling of the monitoring
equipment. He shall ensure that
sufficient noise measuring equipment and associated instrumentation are
available for carrying out the baseline monitoring, regular impact monitoring
and ad hoc monitoring. All the equipment
and associated instrumentation shall be clearly labelled.
6.3.1
The location of the proposed noise monitoring
station for the Contract is presented in Table 6.1 and shown in Figure 2.
Table 6.1 Airborne Construction
Noise Monitoring Locations
|
ID
|
Location
Description
|
|
NMS 5
|
Ma Wan Chung Village (Ma Wan Chung Resident
Association) (Tung Chung)
|
6.3.2
The ET shall select the monitoring location from
the above table based on the locations of the construction activities and seek
approval from ER and agreement from the IEC and EPD to the proposal. The monitoring location should be chosen
based on the following criteria:
l
at
locations close to the major site activities which are likely to have noise
impacts;
l
close
to the most affected existing noise sensitive receivers; and
l
for
monitoring locations located in the vicinity of the sensitive receivers, care
should be taken to cause minimal disturbance to the occupants during
monitoring.
6.3.3
The monitoring station shall normally be at a
point 1 m from the exterior of the sensitive receiver building facade and be at
a position 1.2 m 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 +3
dB(A) shall be made to the free field measurements. The ET 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.
6.3.4
The ENPO may, depending on site conditions and
monitoring results, decide whether additional monitoring locations shall be
included or any monitoring locations could be removed/ relocated during any
stage of the construction phase.
6.4
Baseline Monitoring for Construction Noise
6.4.1
The ET shall carry out baseline monitoring prior
to the commencement of the construction works.
There shall not be any construction activities in the vicinity of the
stations during the baseline monitoring.
Continuous baseline noise monitoring for the A-weighted levels Leq,
L10 and L90 shall be carried out daily for a period of at
least two weeks in a sample period of 5 minutes or 30 minutes between 07:00 and
19:00, and 5 minutes between 19:00 and 07:00.
A schedule on the baseline monitoring shall be submitted to the SO and
IEC for approval before the monitoring starts.
6.4.2
In exceptional cases, when insufficient baseline
monitoring data or questionable results are obtained, the ET shall liaise with
the IEC and EPD to agree on an appropriate set of data to be used as a baseline
reference and submit to the SO for approval.
6.5
Impact Monitoring for Construction Noise
6.5.1
During normal construction working hour
(07:00-19:00 Monday to Saturday), monitoring of Leq, 30
minutes noise levels (as six consecutive Leq, 5 minutes
readings) shall be carried out at the agreed monitoring locations once every
week in accordance with the methodology in the TM.
6.5.2
If a school exists near the construction
activity, noise monitoring shall be carried out at the monitoring stations for
the schools 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 contract.
6.5.3
In case of non-compliance with the construction
noise criteria, more frequent monitoring, as specified in the Action Plan,
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.
6.5.4
A schedule on the compliance monitoring shall be
submitted to the SO and IEC for approval before the monitoring starts.
6.6
Event and Action Plan for Construction Noise
6.6.1
The Action and Limit levels for construction
noise are defined in Table 6.2.
Should non-compliance of the criteria occur, action in accordance with
the Event and Action Plan shall be carried out.
Table 6.2 Action and Limit
Levels for Construction Noise
|
Parameter
|
Action Level
|
Limit Level
|
|
07:00 – 19:00
hours on normal weekdays
|
When one documented complaint is received
|
75 dB(A)
|
Note : If works are to be carried out during restricted hours, the
conditions stipulated in the construction noise permit issued by the Noise
Control Authority have to be followed.
Table 6.3 Event and Action Plan
for Construction Noise
|
Event
|
Action
|
|
ET
|
IEC
|
SO
|
Contractor
|
|
Exceedance of Action Level
|
1. Identify source, investigate the causes of exceedance and propose
remedial measures;
2. Notify IEC and Contractor;
3. Report the results of investigation to the IEC, SO 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 SO accordingly;
3. Supervise the implementation of remedial measures.
|
1. Confirm receipt of notification of failure in writing;
2. Notify Contractor;
3. Require Contractor to propose remedial measures for the analysed
noise problem;
4. Ensure remedial measures are properly implemented
|
1. Submit noise mitigation proposals to IEC;
2. Implement noise mitigation proposals.
|
|
Exceedance of Limit Level
|
1. Identify source;
2. Inform IEC, SO, EPD and Contractor;
3. Repeat measurements 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, SO and EPD the causes and actions taken for the
exceedances;
7. Assess effectiveness of Contractor’s remedial actions and keep
IEC, EPD and SO informed of the results;
8. If exceedance stops, cease additional monitoring.
|
1. Discuss amongst SO, ET, and Contractor on the potential remedial
actions;
2. Review Contractors remedial actions whenever necessary to assure
their effectiveness and advise the SO accordingly;
3. Supervise the implementation of remedial measures.
|
1. Confirm receipt of notification of failure in writing;
2. Notify Contractor;
3. Require Contractor to propose remedial measures for the analysed
noise problem;
4. Ensure remedial measures 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 IEC 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 SO until
the exceedance is abated.
|
6.7.1
The EIA Report has recommended construction
noise control measures including the use of quiet plant and temporary noise
barriers. All the proposed mitigation
measures are summarised in the EMIS in Appendix B.
6.7.2
The ventilation building for tunnel underneath
Scenic Hill shall be installed with sufficient sound attenuators to control its
sound power level emitting to the environment.
Other mitigation measures are not required during the operation phase.
7.1.1
The sediment quality data has been reviewed and
the findings of the site investigation for sediment quality in relation to the
current study area for HKBCF and HKLR is summarised in the EIA Report, there is
no requirement on environmental monitoring and audit for sediment quality.
8.1.1
The quantity and timing for the generation of
waste during the construction phase have been estimated. Measures including the opportunity for
on-site sorting, reusing excavated materials for reclamation etc. are devised
in the construction methodology to minimise the surplus materials to be
disposed off-site. Proper disposal of
chemical waste should be via a licensed waste collector.
8.1.2
All the proposed mitigation measures are
stipulated in the EIA Report and summarized in the EMIS in Appendix B.
8.1.3
The types and quantities of waste that would be
generated during the operational phase have been assessed. It is anticipated there would not be any
insurmountable impacts during the operation phase. A trip-ticket system should be operated to
monitor all movements of chemical wastes which will be collected by a licensed
collector to a licensed facility for final treatment and disposal.
8.1.4
Recommendations have been made to ensure proper
treatment and proper disposal of these wastes in the EIA Report and all the
proposed mitigation measures are stipulated in the EIA Report are summarised in
the EMIS in Appendix B.
8.1.5
EM&A requirements are required for waste
management during the construction phase only and the effective management of
waste arising during the construction phase will be monitored through the site
audit programme. The aims of the waste
audit are:
l
to
ensure the waste arising from the works are handled, stored, collected,
transferred and disposed of in an environmentally acceptable manner; and
l
to
encourage the reuse and recycling of material.
8.2.1
The Contractor shall be required to pay
attention to the environmental standard and guidelines and carry out
appropriate waste management and obtain the relevant licence/permits for waste
disposal. The ET shall ensure that the
Contractor has obtained from the appropriate authorities the necessary waste
disposal permits or licences including:
l
Chemical
Waste Permits/licenses under the Waste Disposal Ordinance (Cap 354);
l
Public
Dumping Licence under the Land (Miscellaneous Provisions) Ordinance (Cap 28);
l
Marine
Dumping Permit under the Dumping at Sea Ordinance (Cap 466); and
l
Effluent
Discharge Licence under the Water Pollution Control Ordinance.
8.2.2
The Contractor shall refer to the relevant
booklets issued by the DEP when applying for the licence/permit and the ET
shall refer to these booklets for auditing purposes.
8.2.3
During the site inspections and the document
review procedures, the ET shall pay special attention to the issues relating to
waste management and check whether the Contractor has followed the relevant
contract specifications and the procedures specified under the laws of Hong
Kong. In addition to the site inspections, the ET shall review the
documentation procedures prepared by the Waste Coordinator once a week to
ensure proper records are being maintained and procedures undertaken in
accordance with the Waste Management Plan.
8.2.4
The Contractor’s waste management practices
should be audited with reference to the checklist detailed in Table 8.1
below:
Table 8.1 Waste Management
Checklist
|
Activities
|
Timing
|
Monitoring
Frequency
|
If
non-compliance, Action Required
|
|
All necessary waste disposal permits or licences have been obtained.
|
Before the commencement of demolition works
|
Once
|
Apply for the necessary permits/ licences prior to disposal of the
waste. The ET shall ensure that corrective action has been taken.
|
|
Only licensed waste haulier are used for waste collection.
|
Throughout the works
|
Weekly
|
The ET shall inform the SO and IEC of the non-compliance. The SO
shall instruct the Contractor to use a licensed waste haulier. The
Contractor shall temporarily suspend waste collection of that particular
waste until a licensed waste haulier is used. Corrective action shall
be undertaken within 48 hours.
|
|
Records of quantities of wastes generated, recycled and disposed are
properly kept. For demolition material/waste,
the number of loads for each day shall be recorded (quantity of waste can
then be estimated based on average truck load. Should landfill charging
be implemented, the receipts of the charge could be used for estimating the
quantity).
|
Throughout the works
|
Weekly
|
The Contractor shall estimate the missing data based on previous
records and the activities carried out. The ET shall audit the results
and forward to the SO and IEC for approval.
|
|
Wastes are removed from site in a timely manner. General refuse
is collected on a daily basis.
|
Throughout the works
|
Weekly
|
The ET shall inform the SO and IEC of the non-compliance. The SO
shall instruct the Contractor to remove waste accordingly.
|
|
Waste storage areas are properly cleaned and do not cause windblown
litter and dust nuisance.
|
Throughout the works
|
Weekly
|
The ET shall inform the SO and IEC of the non-compliance. The SO
shall instruct the Contractor to clean the storage area and/or cover the
waste.
|
|
Different types of waste are segregated in different containers or
skip to enhance recycling of material and proper disposal of waste.
|
Throughout the works
|
Weekly
|
The ET shall inform the SO and IEC of the non-compliance. The SO
shall instruct the Contractor to provide separate skips/ containers.
The Contractor shall ensure the workers place the waste in the appropriate
containers.
|
|
Chemical wastes are stored, handled and disposed of in accordance with
the Code of Practice on the Packaging, Handling and Storage of Chemical
Wastes, published by the EPD.
|
Throughout the works
|
Weekly
|
The ET shall inform the SO and IEC of the non-compliance. The SO
shall instruct the Contractor to rectify the problems immediately.
Warning shall be given to the Contractor if corrective actions are not taken
within 24 hrs and the Waste Control Group of the EPD shall be identified.
|
|
Demolition material/waste in dump trucks are properly covered before
leaving the site.
|
Throughout the works
|
Weekly
|
The ET shall inform the SO and IEC of the non-compliance. The SO
shall instruct the Contractor to comply. The Contractor shall prevent trucks
shall leaving the site until the waste are properly covered.
|
|
Wastes are disposal of at licensed sites.
|
Throughout the works
|
Weekly
|
The ET shall inform the SO and IEC of the non-compliance. The SO
shall warn the Contractor and instruct the Contractor to ensure the wastes
are disposed of at the licensed sites. Should it involve chemical
waste, the Waste Control Group of EPD shall be notified.
|
Note: ET – Environmental Team, IEC –
Independent Environmental Checker, SO – Supervising Officer’s Representative
9.1.1
The reclamation layout of HKLR is presented in Appendix E. The EIA Report has assessed the water quality
impacts caused by the construction and operation stages. Mitigation measures have been recommended in
the EIA to ensure compliance with the relevant legislative requirements. These mitigation measures are summarised
below.
l
Not
used as it is related to the north of the TM-CLKL southern landfall / HKBCF
island.
l
The
decks of barges should be clean and tidy to avoid any filling materials to be
washed into the sea.
l
Overloading
of barge is not allowed and sufficient freeboard should be maintained to ensure
no spill over of the filling materials during lifting and transport.
l
The
moving speed of construction vessels in the filling area should be reduced to
prevent disturbance to the seabed generating sediment plumes.
l
During
the initial months of filling work for HKLR, the silt-removal efficiency of the
silt-curtains shall be verified by examining the results of water quality
monitoring points. The water quality monitoring points to be selected for the
above shall be those close to the locations of the initial period offilling
work. Details in this pilot study shall be determined by the ENPO and agreed by
EPD before the commencement of monitoring, taking account of the Contractor’s
proposed actual locations of his initial period of filling work.
l
Appendix E illustrates different stages of the
arrangement of silt-curtains and shows the typical seawall sections. The hanging-type silt-curtain should allow
access of vessels to enter into or exit from the reclamation area. The vessel
access opening would be formed by two piece of silt-curtain with overlapping
length of 150m minimum and a separation distance of about 50m. The indicative
position and details of the above openings for HKLR are also shown in Appendix E.
l
The
hanging-type silt-curtains should be maintained in good condition to ensure the
sediment plume generated from filling be confined effectively within the site boundary.
9.1.2
Prior to the
commencement of the construction work, a detailed site drainage management plan
should be submitted to EPD. The plan should cover measures to minimize all
potential water quality impact arising from the surface runoffs of all the related
constructions.
9.1.3
The guidelines outlined in the Practice Note for
Professional Persons (ProPECC), Construction Site Drainage (PN 1/94) should be
adopted to control construction site runoff. Mitigation measures to minimise
water quality impacts from construction site runoff and wastewater and sewage
generated from construction activities are:
l
Provision
of site drainage systems over the entire construction site with sediment
control facilities. Regular inspection
and maintenance of the site drainage systems are required to ensure proper and
efficient operation at all times. Sedimentation tanks or package treatment
systems are required to treat the large amount of sediment-laden wastewater
generated from foundation construction
work, wheel washing, site runoff. Any
construction activities that generate wastewater with high concentrations of SS
should also be collected to these facilities for proper treatment prior to
disposal. Treated wastewater can be
reused for vehicle washing, dust suppression and general cleaning. Bentonite slurry used in bore-pile
construction should be reconditioned and reused to minimise the disposal volume
of the used slurry.
l
The
construction programme should be properly planned to avoid soil excavation in
rainy seasons. Exposed stockpiles of
excavated soils or construction materials should be covered with tarpaulin or
impervious sheets to avoid release of pollutants into the drainage channels.
l
Sewage
generated from site toilets and canteen should be collected using a temporary
storage system. Chemical toilets should
be provided at different locations for use by the workers on site. Licensed waste collectors should be employed
for collection and disposal of the sewage.
The drainage system for collection of wastewater generated from canteen,
if any, should be equipped with grease trap capable of providing at least 20
minutes retention during peak flow.
l
Wheel
washing facilities should be installed at all site entrances/exits.
l
An
emergency plan should be developed by the contractors to deal with accidental
spillage of chemicals.
9.1.4
Upon completion of the HKLR / HKBCF development,
stormwater drainage systems would be completed to collect stormwater generated
from the whole area including new roads.
Sewage generated from the HKBCF development would be treated on site to
fulfill effluent limit for discharge.
Additional mitigation measures would not be required.
9.1.5
As identified in the EIA Report, key water
quality issues during construction phase will be filling works for the reclamation
Marine water quality monitoring shall be carried out during the construction
phase to ensure that any unacceptable increase in suspended solids / turbidity
and decrease in dissolved oxygen due to filling activity could be readily
detected and timely action be taken to rectify the situation
9.1.6
Dissolved oxygen (DO), turbidity (NTU) and
suspended solids (SS) and other general in situ parameters shall be monitored
at designated marine water quality monitoring stations during the whole
construction phase. DO and turbidity should be measured in-situ whereas SS
should be determined by an accredited laboratory.
9.1.7
Other relevant data shall also be recorded,
including monitoring location / position, time, water depth, pH value,
salinity, temperature, tidal stages, weather conditions and any special
phenomena or work underway at the construction site.
9.1.8
According to the EIA report, there is low
concentration for PAH, PCB, TBT, and chlorinated pesticides. Monitoring of these chemicals would not be
required during the construction stage.
9.1.9
The proposed water quality monitoring schedule
shall be submitted to EPD at least 2 weeks before the first day of the
monitoring month. EPD shall also be
notified immediately for any changes in schedule by fax.
9.2.1
The instrument should be a portable and
weatherproof dissolved oxygen (DO) measuring instrument complete with cable and
sensor, and use a DC power source. The
equipment should be capable of measuring:
l
a
DO level in the range of 0 - 20 mg/ L and 0 - 200% saturation; and
l
a
temperature of 0 - 45 degree Celsius.
9.2.2
It should have a membrane electrode with
automatic temperature compensation complete with a cable.
9.2.3
Should salinity compensation not be built-in to
the DO equipment, in-situ salinity should be measured to calibrate the DO
equipment prior to each DO measurement.
9.2.4
The instrument should be a portable and
weatherproof turbidity measuring instrument using a DC power source. It should have a photoelectric sensor capable
of measuring turbidity between 0 - 1000 NTU (for example, Hach model 2100P or
an approved similar instrument).
9.2.5
A water sampler is required. It should comprise a transparent PVC
cylinder, with a capacity of not less than 2 litres, which can be effectively
sealed with latex cups at both ends. The
sampler should have a positive latching system to keep it open and prevent
premature closure until released by a messenger when the sampler is at the
selected water depth (for example, Kahlsico Water Sampler or an approved
similar instrument).
9.2.6
A portable, battery-operated echo sounder should
be used for the determination of water depth at each designated monitoring
station. This unit can either be hand
held or affixed to the bottom of the work boat, if the same vessel is to be
used throughout the monitoring programme.
9.2.7
A portable salinometer capable of measuring
salinity in the range of 0 - 40 parts per thousand (ppt) should be provided for
measuring salinity of the water at each monitoring location.
9.2.8
A portable pH meter capable of measuring a range
between 0.0 and 14.0 shall be provided to measure pH under the specified
conditions (e.g., Orion Model 250A or an approved similar instrument).
9.2.9
Water samples for SS should be stored in high
density polythene bottles with no preservative added, packed in ice (cooled to
4°C without being frozen) and kept in dark during both on-site temporary storage
and shipment to the testing laboratory.
The samples shall be delivered to the laboratory within 24 hours of
collection and be analysed as soon as possible after collection.
9.2.10
A hand-held or boat-fixed type digital Differential
Global Positioning System (DGPS) with way point bearing indication and Radio
Technical Commission for maritime (RTCM) Type 16 error message ‘screen pop-up’
facilities (for real-time auto-display of error messages and DGPS corrections
from the Hong Kong Hydrographic Office), or other equipment instrument of
similar accuracy, should be provided and used during marine water monitoring to
ensure the monitoring vessel is at the correct location before taking
measurements.
9.2.11
The pH meter, DO meter and turbidimeter shall be
checked and calibrated before use. DO
meter and turbidimeter shall be certified by a laboratory accredited under
HOKLAS or any other international accreditation scheme, and subsequently
re-calibrated at 3 monthly intervals throughout all stages of the water quality
monitoring. Responses of sensors and
electrodes should be checked with certified standard solutions before each use. Wet bulb calibration for a DO meter shall be
carried out before measurement at each monitoring location.
9.2.12
Sufficient stocks of spare parts shall be
maintained for replacements when necessary.
Backup monitoring equipment shall also be made available so that
monitoring can proceed uninterrupted even when some equipment is under
maintenance, calibration, etc. For the
on-site calibration of field equipment, the BS1427:1993, "Guide to Field
and on-site test methods for the analysis of waters" shall be observed.
9.2.13
The Water Quality Monitoring will involve a
large number of monitoring stations and measurements should be conducted within
the prescribed tidal conditions (within ± 1.75 hour of the predicted mid-ebb or
mid-flood tides) in order to ensure the measurement/samples are
representative. A multi-probe monitoring
equipment set integrated with water sampler(s) is highly recommended to improve
the monitoring efficiency. It is, also,
likely that more than one field survey vessels will be required simultaneously
to ensure the monitoring are conducted within the acceptable monitoring
windows. The ET shall also consider the
use of unattended automatic sampling/monitoring devices at fixed stations where
monitoring are required throughout the construction period. The use of such unattended automatic devices,
however, shall be subject to the approval of the SO, IEC and EPD.
9.3.1
Duplicate samples from each independent sampling
event are required for all suspended solids measurements, which shall be carried
in a HOKLAS or other international accredited laboratory. Sufficient water samples shall be collected
at the monitoring stations for carrying out the laboratory measurement and
analysis. The laboratory determination
work shall start within 24 hours after collection of the water samples. The analysis for SS is summarized in Table
9.1.
Table 9.1 Laboratory Analysis
for Suspended Solids (SS)
|
Parameters
|
Instrumentation
|
Analytical Method
|
Detection Limit
|
|
Suspended Solid (SS)
|
Weighting
|
APHA 2540-D
|
0.5 mg/L
|
9.3.2
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
shall be approved by EPD. All the
analysis shall be witnessed by the SO.
The ET Leader shall provide the SO with one copy of the relevant
chapters of the “APHA Standard Methods for the Examination of Water and
Wastewater” 19th edition and any other relevant document for his reference.
9.4.1
The water quality monitoring stations, control
stations and locations for during the construction and operation phase of HKLR
are shown in Figure 2. These stations and locations are considered
representative for the contract. The
selection of these stations is referenced to Clause 8.2.4A of the Employer’s
Requirements of Contract No. HY/2011/03 and is based on the following criteria:
(i)
Impact
stations (IS) within 250m – 500m envelope of the construction works (4
stations)
(ii)
Sensitive
receiver stations (SR) near to key sensitive receivers (5 stations)
(iii)
Control
/ far field station (CS) at representative locations with less influence by the
Project (1 station). Control stations
should be located, as far as practicable, both upstream and downstream of the
works area. The locations CS(Mf) also
serve as the control stations for Mf deposition sites (1 station).
(iv)
Impact
stations (IS(Mf)) around the on-site Mf deposition sites during the on-site
disposal of Mf material (2 stations).
9.4.2
The co-ordinates of the proposed 13 monitoring
stations during the construction phase are listed in
Table 9.2. As shown in Figure 2, the proposed locations for the
sensitive receiver monitoring stations represent the typical sensitive
receivers around the project works.
Table 9.2 Water Quality Monitoring Stations
(Construction and Post Construction Phases)
|
Station
|
Description
|
East
|
North
|
Parameters
to be Measured
|
|
IS5
|
Impact
Station (Close to HKLR construction site)
|
811579
|
817106
|
DO, Turbidity,
SS
|
|
IS(Mf)6
|
Impact
Station (Close to HKLR construction site)
|
812101
|
817873
|
DO,
Turbidity, SS
|
|
IS7
|
Impact
Station (Close to HKBCF construction site)
|
812244
|
818777
|
DO,
Turbidity, SS
|
|
IS8
|
Impact Station
(Close to HKBCF construction site)
|
814251
|
818412
|
DO,
Turbidity, SS
|
|
IS(Mf)9
|
Impact
Station (Close to HKBCF construction site)
|
813273
|
818850
|
DO,
Turbidity, SS
|
|
IS10
|
Impact
Station (Close to HKBCF construction site)
|
812577
|
820670
|
DO,
Turbidity, SS
|
|
SR3
|
Sensitive
receivers (San Tau SSSI)
|
810525
|
816456
|
DO,
Turbidity, SS
|
|
SR4
|
Sensitive
receivers (Tai Ho Inlet)
|
814760
|
817867
|
DO,
Turbidity, SS
|
|
SR5
|
Sensitive receivers
(Artificial Reef in NE Airport)
|
811489
|
820455
|
DO,
Turbidity, SS
|
|
SR10A
|
Sensitive
receivers (Ma Wan FCZ)
|
823741
|
823495
|
DO,
Turbidity, SS
|
|
SR10B
|
Sensitive
receivers (Ma Wan FCZ)
|
823686
|
823213
|
DO,
Turbidity, SS
|
|
CS2
|
Control
Station
|
805849
|
818780
|
DO,
Turbidity, SS
|
|
CS(Mf)5
|
Control
Station
|
817990
|
821129
|
DO,
Turbidity, SS
|
9.4.3
Control stations (CS2, CS(Mf)5) 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
should be outside the area of influence of the works and, as far as
practicable, not affected by any other works.
9.4.4
In-situ monitoring (DO concentration and
saturation, temperature, turbidity, pH, salinity) and water sample for SS shall
be taken at 3 water depths, namely, 1 m below water surface, mid-depth and 1 m
above sea bed, except where the water depth is less than 6 m, in which case the
mid-depth station may be omitted. Should
the water depth be less than 3 m, only the mid-depth station will be
monitored. The status and locations of
water sensitive receivers and the marine activities may change after issuing
this Manual. If such cases exist, the ET
Leader shall propose with justification for changes to monitoring locations or
other requirements of the EM&A programme, and seek approval from the IEC
and EPD.
9.4.5
The ENPO may, depending on site conditions and
monitoring results, decides whether additional monitoring locations shall be
included or any monitoring locations could be removed / relocated during any
stage of the construction phase after getting approval from EPD.
9.5.1
Baseline conditions for marine water quality
shall be established and agreed with EPD prior to the commencement of
works. The purpose of the baseline
monitoring is to establish ambient conditions prior to the commencement of the
works and to demonstrate the suitability of the proposed impact and control
monitoring stations. The baseline
conditions shall normally be established by measuring the DO, temperature,
turbidity, pH, salinity and SS at all designated locations. The measurements shall be taken at all
designated monitoring stations in Table 9.2 above including control
stations, 3 days per week, at mid-flood (within ± 1.75 hour of the predicted
time) and mid-ebb (within ± 1.75 hour of the predicted time) tides, for at
least 4 weeks prior to the commencement of marine works. Replicate in-situ measurements and samples
collected from each independent sampling event shall be collected to ensure a
robust statistically interpretable database.
9.5.2
Baseline monitoring programme may overlap with
other reclamation activities. The
monitoring exercise should be scheduled as far as possible to avoid concurrent
filling activity around the monitoring stations such that representative
ambient data could be sampled.
9.5.3
Other relevant data shall also be recorded, such
as monitoring location / position, time, water depth, tidal stages, weather
conditions and any special phenomena underway near the monitoring station. There shall not be any marine construction
activities in the vicinity of the stations during the baseline monitoring.
9.5.4
As this project will last for a few years, the
ET Leader should seek approval from the IEC and EPD on an appropriate set of
data to be used with the baseline data collected by this study to establish two
set of AL levels respectively for the wet and dry season.
9.5.5
Baseline monitoring schedule shall be faxed to
EPD 2 weeks prior to the commencement of baseline monitoring. The interval between two sets of monitoring
shall not be less than 36 hours.
9.5.6
Prior to the commencement of the Contract, the
Highways Department has employed environmental specialists under Agreement No.
CE 35/2011 (EP) to carry out the baseline environmental monitoring in water
quality. Data of the baseline water
quality monitoring will be referenced to as appropriate. If baseline monitoring is considered necessary
to be carried out, it shall be carried out in accordance with the following
requirements.
9.6.1
The ET
shall be responsible for conducting tests to confirm that their silt curtain
systems to be adopted would satisfy the requirements in the EIA Report.
9.6.2
A
method statement shall be submitted by the ET Leader to seek approval from the
IEC and EPD.
9.6.3
During
the initial period of filling work for HKBCF and HKLR, the silt-removal
efficiency of the silt-curtains shall be verified by examining the results of
water quality monitoring points. The water quality monitoring points to be
selected for the above shall be those close to the locations of the initial
period of filling work. The details for
the pilot study shall be determined by the ENPO and agreed by EPD, taking
account of the Contractor’s proposed actual locations of his initial period of
filling work.
9.6.4
Pilot
tests should be carried out during the early stage of construction to confirm
whether the silt removal efficiency of the floating type silt curtains can
achieve 45% silt removal
efficiency for filling activity
when deployed, and a combined reduction of 61% when the two layers of floating type silt curtains are used.
9.6.5
The
pilot test shall include basic
measurements such as turbidity and suspended solids as well as current speed
and direction. A method
statement shall be submitted by the ET Leader to seek approval from the IEC and
EPD.
9.6.6
Not
used as there are no cage type silt curtains for the Contract.
9.6.7
Regardless
of the measured efficiency of the silt curtain system, the event and action
plan shall only be based on the monitoring results at the designed monitoring
stations.
9.7
Impact Monitoring for Water
Quality
9.7.1
Reclamation would require filling activity
during the construction. During this period, silt curtains would be installed
enclosing the whole project site to control sediment loss. Appendix E
shows the arrangement of the silt curtains.
During the construction period, monitoring shall be undertaken 3 days
per week, at mid-flood (within ± 1.75 hour of the predicted time) and mid-ebb
(within ± 1.75 hour of the predicted time) tides, with sampling / measurement
at the designated monitoring stations. Replicate
in-situ measurements and samples collected from each independent sampling event
shall be collected to ensure a robust statistically interpretable
database. The interval between two sets
of monitoring shall 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. Two
consecutive measures of DO concentration, DO saturation, pH, salinity,
temperature, turbidity and water samples for SS will be taken in situ at 1 m
below the surface, mid-depth and 1 m above the seabed at each location. If the water depth is less than 6 m, the
mid-depth measurement may be omitted subject to the approval of the SO. If the
depth is less than 3 m, only the mid-depth measurements need to be taken
subject to the approval of the SO. The
monitoring probes shall be retrieved out of water after the first measurement
and then redeployed for the second measurement.
Where the difference in value between the first and second readings of
DO or turbidity parameters is more than 25% of the value of the first reading,
the reading shall be discarded and further readings shall be taken.
9.7.2
If the impact monitoring results indicate that
filling work has caused adverse impacts on water quality at the monitoring
stations, appropriate actions (including the lowering of production rates for
filling) should be taken and additional mitigation measures should be
implemented as necessary. Water quality
monitoring frequency has to be increased to once per day when filling is
undertaken. 24-hour monitoring of
turbidity should be implemented as and when necessary. The monitoring results should be made
available within a reasonable short period to be agreed with the EPD, SO and
IEC.
Relocation
of Mf Sediment with Reclamation Area
9.7.3
Not used.
9.7.4
Not used.
Water
Quality Monitoring along the Water Boundary of Hong Kong and Mainland
9.7.5
Not used because the stations for sensitivity
test are far away far from the Contract.
9.8
Post-construction
Monitoring
9.8.1
Upon completion of all marine-based construction
activities, a post-project monitoring exercise on water quality shall be
carried out for 4 weeks in the same manner as the baseline monitoring. Replicate in-situ measurements and samples
collected from each independent sampling event shall be collected to ensure a
robust statistically interpretable database.
The measurement parameters for post-construction monitoring shall
include DO, temperature, turbidity, pH, salinity, and SS. The measurement shall be taken at all
designated monitoring stations including control stations, 3 days per week, at
mid-flood (within ± 1.75 hour of the predicted time) and mid-ebb (within ± 1.75
hour of the predicted time) tides, for at least 4 weeks. Since the southern and
northern landfalls of TM-CLKL are distant
from each other and based on the tentatively programme available during
the EIA stage the two
landfall has a
different construction time frame, the Post-construction monitoring
for each landfalls may conducted separately. The ET should review the actual
implantation programme and recommend if a separate post-construction monitoring
for each landfall is required.
9.9.1
The marine water quality monitoring shall be
performed monthly during the first year of Project operation at all designated
monitoring stations including control stations. Each monthly monitoring event
shall consist of one monitoring and sampling event during both mid-ebb (within
± 1.75 hour of the predicted time) and mid-flood (within ± 1.75 hour of the
predicted time) tides of the same monitoring day. The operation phase
monitoring shall be ceased after the first year of operation of the Project
subject to the first year review. No marine construction activities should be
conducted in the vicinity of the stations during the Operational Phase
monitoring period.
9.9.2
Sampling shall be taken at three water depths,
namely, 1m below water surface, mid-depth and 1m above sea bed, except where
the water depth is less than 6m, in which case the mid-depth station may be
omitted. If the water depth be less than 3m, only the mid-depth station will be
monitored. In-situ measurements at DO, turbidity, SS, pH, salinity and
temperature shall be taken at all the monitoring stations SR2, SR3, CS2 and
CS(Mf)5. (refer to Table 9.2b). A
full set of in duplicated situ measurement and water samples shall be collected
during each of the mid-ebb (within ± 1.75 hour of the predicted time) and
mid-flood (within ± 1.75 hour of the predicted time) tides.
Table 9.2b Water Quality Monitoring Stations (Operation Phases)
|
Station
|
Description
|
East
|
North
|
Parameters
to be measured
|
|
SR2
|
Sensitive
receivers (Sha Lo Wan )
|
807856
|
816953
|
DO,
Turbidity, SS, pH, salinity, temperature
|
|
SR3
|
Sensitive
receivers (San Tau SSSI)
|
810525
|
816456
|
DO,
Turbidity, SS, pH, salinity, temperature
|
|
CS2
|
Control Station
|
805849
|
818780
|
DO,
Turbidity, SS, pH, salinity, temperature
|
|
CS(Mf)5
|
Control Station
|
817990
|
821129
|
DO,
Turbidity, SS, pH, salinity, temperature
|
9.10.1
The Action and Limit levels for water quality
are defined in Table 9.3. Should
non-compliance of the criteria occur, action in accordance with the Action Plan
in Table 9.3 shall be carried out.
9.10.2
Not used.
Table 9.3 Action and Limit Levels for Water Quality
|
Parameters
|
Action
|
Limit
|
|
DO in mg/L
(Surface, Middle & Bottom)
|
Surface and Middle
5 percentile of baseline data for surface
and middle layer
Bottom
5 percentile of baseline data for bottom layer
|
Surface and Middle
4 mgL-1 except 5mg/l for FCZ or 1
percentile of baseline data for surface and middle layer
Bottom
2 mgL-1 or 1 percentile of
baseline data for bottom layer
|
|
|
|
SS in mg/L (depth-averaged) at all monitoring
stations and control stations
|
95 percentile of baseline data and 120% of upstream control station's SS at the
same tide of the same day
|
99 percentile of baseline data and 130% of upstream control station's SS at the
same tide of the same day and 10 mg/L for WSD seawater intakes
|
|
Turbidity in NTU
|
95 percentile of baseline data and 120% of upstream control station's Turbidity
at the same tide of the same day
|
99 percentile of baseline data and 130% of upstream control station's Turbidity
at the same tide of the same day
|
Notes:
1.
"depth-averaged" is calculated
by taking the arithmetic means of reading of all three depths.
2.
For DO, non-compliance of the water quality
limits occurs when monitoring result is lower than the limits.
3.
For turbidity, SS, non-compliance of the
water quality limits occurs when monitoring result is higher than the limits.
4.
All the figures given in the table are
used for reference only and the EPD may amend the figures whenever it is
considered as necessary.
Table 9.4 Event and Action
Plan for Water Quality
|
Event
|
Action
|
|
ET Leader
|
IEC
|
SO
|
Contractor
|
|
Action level being exceeded by one sampling day
|
1. Repeat
in situ measurement on next day of exceedance to confirm findings;
2. Identify
source(s) of impact;
3. Inform
IEC, contractor and SO;
4. Check
monitoring data, all plant, equipment and Contractor's working methods.
|
1. Check
monitoring data submitted by ET and Contractor’s working methods.
|
1. Confirm
receipt of notification of non-compliance in writing;
2. Notify
Contractor.
|
1. Inform
the SO and confirm notification of the non-compliance in writing;
2. Rectify
unacceptable practice;
3. Amend
working methods if appropriate.
|
|
Action level being exceeded by two or more
consecutive sampling days
|
1. Repeat
measurement on next day of exceedance to confirm findings;
2. Identify
source(s) of impact;
3. Inform
IEC, contractor, SO and EPD;
4. Check
monitoring data, all plant, equipment and Contractor's working methods;
5. Discuss
mitigation measures with IEC, SO and Contractor;
6. Ensure
mitigation measures are implemented;
7. Increase
the monitoring frequency to daily until no exceedance of Action level;
|
1. Check
monitoring data submitted by ET and Contractor’s working method;
2. Discuss
with ET and Contractor on possible remedial actions;
3. Review
the proposed mitigation measures submitted by Contractor and advise the SO
accordingly;
4. Supervise
the implementation of mitigation measures.
|
1. Discuss
with IEC on the proposed mitigation measures;
2. Ensure
mitigation measures are properly 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 consider changes of working methods;
4. Submit
proposal of additional mitigation measures to SO within 3 working days of
notification and discuss with ET, IEC and SO;
5. Implement
the agreed mitigation measures.
|
|
Limit level being exceeded by one sampling day
|
1. Repeat
measurement on next day of exceedance to confirm findings;
2. Identify
source(s) of impact;
3. Inform
IEC, contractor, SO and EPD;
4. Check
monitoring data, all plant, equipment and Contractor's working methods;
5. Discuss
mitigation measures with IEC, SO and Contractor;
|
1. Check
monitoring data submitted by ET and Contractor’s working method;
2. Discuss
with ET and Contractor on possible remedial actions;
3. Review
the proposed mitigation measures submitted by Contractor and advise the SO
accordingly.
|
1. Confirm
receipt of notification of failure in writing;
2. Discuss
with IEC, ET and Contractor on the proposed mitigation measures;
3. Request
Contractor to review the working methods.
|
1. Inform
the SO 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. Submit
proposal of mitigation measures to SO within 3 working days of notification
and discuss with ET, IEC and SO.
|
|
Limit level being exceeded by two or more
consecutive sampling days
|
1. Repeat
measurement on next day of exceedance to confirm findings;
2. Identify
source(s) of impact;
3. Inform
IEC, contractor, SO and EPD;
4. Check
monitoring data, all plant, equipment and Contractor's working methods;
5. Discuss
mitigation measures with IEC, SO and Contractor;
6. Ensure
mitigation measures are implemented.
|
1. Check
monitoring data submitted by ET and Contractor’s working method;
2. Discuss
with ET and Contractor on possible remedial actions;
3. Review
the Contractor’s mitigation measures whenever necessary to assure their
effectiveness and advise the SO 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. Submit
proposal of mitigation measures to SO within 3 working days of notification
and discuss with ET, IEC and SO;
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.
|
9.11.1
The EIA Report has recommended construction and
operational phase mitigation measures.
All the prepared mitigation measures are summarized in the EMIS in Appendix B.
10.1.1
The EIA Report has assessed the ecological
impacts caused by the construction
and operation phases. Mitigation measures have been recommended in the EIA to
ensure compliance with the relevant legislative requirements. The mitigation measures and ecological
monitoring surveys are stated in this Manual in the sections below. A detailed ecological monitoring plan with
specification and detailed methodology will be prepared prior to the baseline
monitoring, and submitted to AFCD and EPD for approval.
10.2.1
Low disturbance construction method - Any
significant changes in water quality or turbidity should be avoided. This could be mitigated through construction
methods.
10.2.2
Not used as there is no dredging activity.
10.2.3
Not used as there is no filling activity for construction
of piers.
10.2.4
Good Site Practices – The integrity and
effectiveness of all silt curtains should be regularly inspected. Effluent monitoring should be incorporated to
make sure that the discharged effluent from construction sites meets the
relevant effluent discharge guidelines.
10.2.5
Strict enforcement on No-dumping – To avoid
degrading the Chinese White Dolphin habitat, restrictions prohibiting dumping
of rubbish, food, oil, or chemicals will be strictly enforced.
10.2.6
Site runoff control - For works on land,
standard site runoff control measures will be established and strictly enforced
to ensure that discharge of contaminated or silt-laden runoff into North Lantau
waters is minimised.
10.2.7
Spill response plan – In the event of vessels
operating in the works areas transporting oil or other hazardous chemicals, an
oil-spill response plan, with specific provisions for protecting marine ecology
and dolphins, will be formulated.
10.2.8
Note used as this section is for HKBCF
Reclamation.
10.2.9
The impact from this minor and short-term source
can be reduced by good site practice, including strictly following the
permitted works hours, using quieter machines where practicable, and avoiding
excessive lightings during night time.
10.2.10
Although the extent of earthwork will not affect
habitats of Romer’s Tree Frog, good site practices (e.g., watering to reduce
dust generation, prevention of siltation of freshwater habitats) are still
recommended to be implemented. Site runoff should be desilted, to reduce the
potential for suspended sediments, organics and other contaminants to enter
streams and standing freshwater (which are potential breeding habitats of
Romer’s Tree Frog). Caution must be
taken to avoid runoff entering the area in which Romer’s Tree Frog has been
recorded.
1) Bored piling
10.2.11
Not used as there is no bored piling work.
10.2.12
Not used as there is no bored piling work.
10.2.13
Not used as there is no bored piling work.
2) Sheet piling
10.2.14
Note used as there is no sheet piling work.
10.2.15
Note used as there is no sheet piling work.
3) Reclamation and Works Vessels
10.2.16
Dolphin Exclusion Zone - dolphin exclusion zone
of 250m radius should be implemented in the HKLR reclamation sites during the
installation of the perimeter silt curtains and any re-deployment of the
perimeter silt curtains. Works will be suspended when any Chinese White Dolphin
(CWD) is found within the exclusion zone.
10.2.17
Dolphin Watching Plan - A dolphin watching plan
for works areas will also be included in the EM&A programme. For reclamation sites, once the perimeter
silt curtains are installed or re-deployed, the filling work would be conducted
inside the silt curtains and a dolphin exclusion zone is not needed. Instead a dolphin watching plan will be
performed. The plan would include
regular inspection of the silt curtains, scanning of the waters surrounded by
the curtains, and an action plan should be devised to cope with any unpredicted
incidents such as in case dolphins are found within the waters surrounded by
the silt curtains. Similarly, at marine
pier sites the concreting work could be conducted inside the bored pile casing
after its installation. A dolphin watching
plan will replace the dolphin exclusion zone after the casing is installed.
10.2.18
Acoustic decoupling of compressors and other
equipment – Air compressors and other noisy equipment that must be mounted on
construction vessels will be acoustically-decoupled to the greatest extent
feasible, for instance by using rubber air-filled tires.
10.2.19
Vessel speed limit control – It is known that
fast-moving vessels are a threat to dolphins and porpoises, a speed limit of 10
knots will be strictly enforced within the work areas. This speed limit for vessels within the
boundaries of the Sha Chau/Lung Kwu Chau Marine Park appears to be effective in
protecting the dolphins from vessel collisions.
10.2.20
Skipper training – Captains of construction
vessels working in the West Lantau
waters and near the Brothers Islands should undergo training to learn about
local dolphins and porpoises. They
should be trained to be aware of the protocol for “dolphin friendly” vessel
operation (reference made to Code of Conduct for Dolphin Watching Activities
available from AFCD).
10.2.21
Predefined and regular routes for working
vessels – Captains of all working vessels should be required to use regular
travel routes, in order to minimize the chance of vessel collision. And the routes would not go through the
dolphin hotspot in Brothers Islands.
10.2.22
Silt-grease traps should be deployed to prevent
a direct input of road surface runoff to the marine waters.
10.2.23
A Maritime Oil Spill Response Plan (MOSRP) has
been developed by Marine Department to deal with oil spill and their potential
hazard to the Hong Kong waters. The main
objective of the MOSRP is to ensure a timely and effective response to oil
spillages and/or their potential treats in the Hong Kong waters.
10.2.24
Similar to the Shenzhen Western Corridor
project, a Spill Response Plan will be formulated to deal with the accidental
event of the serious spillage of oil or other hazardous chemicals and it should
be at least 1 month before the commencement of the construction of the
Project. A Spill Response Plan in this
regard will be primarily for safety issues and water quality, but could also
help to safeguard the dolphin population.
It will detail the actions to be taken in the event of accidental
spillage of oil or other hazardous chemicals from construction activities
including vessels operating of for the Project, with specific provisions for
protecting marine ecology and the Chinese White Dolphins. Following the example of Shenzhen Western
Corridor, it will be specified in the contingency plan that AFCD must be alerted
by the Hong Kong Police Force or Fire Service Department in case an accident of
spillage of chemical or oil is reported.
Precautionary/ Enhancement Measures
10.2.25
As a precautionary measure, pre-construction
dive survey for corals will be conducted along the shore of the HKLR
reclamation site (see Figure 3),
prior to marine construction works in this location, to identify any coral
colonies suitable for translocation, taking into account the conservation
value, the health status and the translocation feasibility. The pre-construction dive survey for area
near Sha Lo Wan Headland and at pier site nearest to the intertidal zone is not
required for the Contract as these sites would not be affected by the
Contract. A detailed translocation plan
will be prepared if corals (including hard corals, soft corals and octocorals)
of conservation importance, in good conditions, and feasible for translocation
are identified during the survey.
10.2.26
Not used as no artificial reefs will be affected
by the contract.
10.2.27
Not used as no artificial reefs will be affected
by the contract.
10.3
Monitoring and Audit for
Ecology
10.3.1
An ecological monitoring and audit programme
would be needed for the Project HKLR developments. The monitoring programme
will include monitoring of
physical parameters such as air, noise and water quality, and ecological
aspects such as CWD and mudflats. The
ecological monitoring and audit programme will monitor potential impacts
through construction and operation activities, and will verify the assessments
which were made in the EIA report. The monitoring includes the following tasks:
10.3.2
Dolphin monitoring - A dolphin monitoring
programme at North Lantau and West Lantau waters, in particular the dolphin
sighting hotspots (e.g. Brothers Islands) and areas where juveniles have been
sighted (e.g. West Lantau waters), should be set up to verify the predictions
of impacts and to ensure that there are no unforeseen impacts on the dolphin
population during construction phase.
The monitoring period should cover the pre-construction phase (baseline
conditions), the entire period of construction phase (tentatively 2010 - 2016),
and at least one year after the completion of construction works.
10.3.3
Not used as there is no bored poling work for the
Contract.
10.3.4
Not used as there is no bored poling work for
the Contract.
10.3.5
Not used as there is no bored poling work for
the Contract.
10.3.6
Mudflat monitoring - A monitoring programme on
the intertidal soft shore habitats on north Lantau coastlines, in San Tau and
Tung Chung Bay where horseshoe crab juveniles and seagrass beds have been
sighted, should be set up to verify the
predictions of impacts.
The monitoring period should cover the pre-construction phase (baseline
conditions), the entire period of construction phase, and after the completion
of construction works. The monitoring
should cover the water quality, sedimentation rate, horseshoe crab population,
seagrass beds, and soft shore intertidal communities. The survey methodology should make reference
to previous intertidal soft shore surveys/monitoring (e.g. the seagrass bed
monitoring in Shenzhen Western Corridor, and the territory-wide horseshoe crab
study by Shin et al. 2007. Conservation of Horseshoe Crabs in Hong Kong -Final
Report (ECF Project 12/2003)).
10.3.7
Each of the above ecological monitoring surveys
shall be undertaken by suitably qualified specialist(s), (i.e. dolphin
specialist, bio-acoustician and intertidal ecologist), who shall have
sufficient (at least 5-10 years) relevant post-graduate experience and
publication in the respective aspects. Approval on the specialist(s)
responsible for each ecological monitoring survey shall be sought from AFCD and
EPD.
10.4.1
Dolphin monitoring - the dolphin monitoring
should adopt line-transect vessel survey method, and cover the line-transect
survey areas as in AFCD annual marine mammal monitoring programme for Northeast
Lantau survey area; and Northwest Lantau survey area (Figure 4).
10.4.2
Not used as there is no bored poling work for
the Contract..
10.4.3
Not used as there is no bored poling work for
the Contract.
10.4.4
Mudflat monitoring - the monitoring will be
conducted on the intertidal soft shore habitats in San Tau and Tung Chung Bay
where horseshoe crab juveniles and seagrass beds have been sighted (Figure 2).
10.4.5
Pre-construction dive survey for corals - the
survey will be conducted for about 2 to 3 weeks along the shore of the HKLR
reclamation site (see Figure 3).
10.5.1
Baseline for dolphin monitoring shall be
established by two surveys per month in each survey area stated in Section
10.4.1 for a period of three months prior to the commencement of works and agreed
with AFCD. The purpose of the baseline
monitoring is to establish pre-construction conditions prior to the
commencement of the works and to demonstrate the suitability of the proposed
monitoring method.
10.5.2
Not used as there are no construction works in the
waters to the west of Airport for the Contract..
10.5.3
Not used as there is no construction of bridge
for the Contract.
10.5.4
Baseline for mudflat ecology shall be
established prior to the commencement of works and agreed with AFCD.
10.5.5
As this project will last for a few years, the
ET Leader should seek approval from the IEC, AFCD and EPD on an appropriate
methodology and parameters to be recorded. A detailed ecological monitoring
plan with specification and detailed methodology will be prepared prior to the
baseline monitoring, and submitted to AFCD and EPD for approval.
10.6.1
Dolphin monitoring will be conducted twice a
month in each survey area stated in Section 10.4.1 throughout the entire
construction period.
10.6.2
Not used as there is no bored poling work for
the Contract.
10.6.3
Not used as there is no bored piling work for
the Contract.
10.6.4
If the impact monitoring results indicate that
the density or the distribution pattern of CWD has changed, the ET should
inform AFCD and investigate the possible causes of the change. Appropriate actions should be recommended and
additional mitigation measures should be implemented as necessary. The monitoring results should be made
available within a reasonable short period to be agreed with the EPD, ER and
IEC.
10.6.5
Mudflat monitoring will be conducted quarterly
during the construction period. If the
impact monitoring results indicate that the density or the distribution pattern
of intertidal fauna and seagrasses has changed, the ET should inform AFCD and
investigate the possible causes of the change.
Appropriate actions should be recommended and additional mitigation
measures should be implemented as necessary.
The monitoring results should be made available within a reasonable short
period to be agreed with the EPD, ER and IEC.
10.7
Post-construction Monitoring for Ecology
10.7.1 The
dolphin monitoring and mudflat ecological monitoring will be conducted in the
post-construction phase at least for 2 year after completion of construction.
10.8.1
The Action and Limit levels for dolphin
monitoring are shown in Table 10.1.
The revised Event and Action Plan for dolphin monitoring as shown in Table 10.2 was approved by
EPD in May 2013.
Table 10.1 AL and LL for Dolphin Impact Monitoring
|
|
North Lantau Social Cluster
|
|
NEL
|
NWL
|
|
Action
Level
|
STG
< 4.2 & ANI < 15.5
|
STG
< 6.9 & ANI < 31.3
|
|
Limit
Level
|
(STG
< 2.4 & ANI < 8.9) and (STG < 3.9 & ANI < 17.9)
|
Remarks:
1.
STG means quarterly encounter
rate of number of dolphin sightings.
2.
ANI means quarterly
encounter rate of total number of dolphins.
3.
For North Lantau Social Cluster, AL will be trigger
if either NEL or NWL fall below the
criteria; LL will be triggered if both NEL and
NWL fall below the criteria.
Table 10.2 Event and Action Plan for Dolphin
Monitoring
|
Event
|
ET Leader
|
IEC
|
SO
|
Contractor
|
|
Action Level
|
1.
Repeat
statistical data analysis to confirm findings;
2.
Review
all available and relevant data, including raw data and statistical analysis
results of other parameters covered in the EM&A, to ascertain if
differences are as a result of natural variation or previously observed
seasonal differences;
3.
Identify
source(s) of impact;
4.
Inform
the IEC, SO and Contractor;
5.
Check
monitoring data.
6.
Review
to ensure all the dolphin protective measures are fully and properly
implemented and advise on additional measures if necessary.
|
1.
Check
monitoring data submitted by ET and Contractor;
2.
Discuss
monitoring results and findings with the ET and the Contractor.
|
1.
Discuss
monitoring with the IEC and any other measures proposed by the ET;
2.
If
SO is satisfied with the proposal of any other measures, SO to signify the
agreement in writing on the measures to be implemented.
|
1.
Inform
the SO and confirm notification of the non-compliance in writing;
2.
Discuss
with the ET and the IEC and propose measures to the IEC and the ER/SOR;
3.
Implement
the agreed measures.
|
|
Limit Level
|
1.
Repeat
statistical data analysis to confirm findings;
2.
Review
all available and relevant data, including raw data and statistical analysis
results of other parameters covered in the EM&A, to ascertain if
differences are as a result of natural variation or previously observed
seasonal differences;
3.
Identify
source(s) of impact;
4.
Inform
the IEC, SO and Contractor of findings;
5.
Check
monitoring data;
6.
Repeat
review to ensure all the dolphin protective measures are fully and properly
implemented and advise on additional measures if necessary;
7.
If
ET proves that the source of impact is caused by any of the construction
activity by the works contract, ET to arrange a meeting to discuss with IEC,
SO and Contractor the necessity of additional dolphin monitoring and/or any
other potential mitigation measures (e.g., consider to modify the perimeter
silt curtain or consider to control/temporarily stop relevant construction
activity etc.) and submit to IEC a proposal of additional dolphin monitoring
and/or mitigation measures where necessary.
|
1.
Check
monitoring data submitted by ET and Contractor;
2.
Discuss
monitoring results and findings with the ET and the Contractor;
3.
Attend
the meeting to discuss with ET, SO and Contractor the necessity of additional
dolphin monitoring and any other potential mitigation measures;
4.
Review
proposals for additional monitoring and any other mitigation measures
submitted by ET and Contractor and advise SO of the results and findings
accordingly;
5.
Supervise / Audit the implementation of additional monitoring
and/or any other mitigation measures and advise SOthe results and findings
accordingly.
|
1. Attend the meeting to discuss with ET, IEC and
Contractor the necessity of additional dolphin monitoring and any other
potential mitigation measures;
2. If SO is satisfied with the proposals for
additional dolphin monitoring and/or any other mitigation measures submitted
by ET and Contractor and verified
by IEC, SO to signify the
agreement in writing on such proposals and any other mitigation measures;
3.
Supervise
the implementation of additional monitoring and/or any other mitigation
measures.
|
1.
Inform
the SO and confirm notification of the non-compliance in writing;
2.
Attend
the meeting to discuss with ET, IEC and SO the necessity of additional
dolphin monitoring and any other potential mitigation measures;
3.
Jointly
submit with ET to IEC a proposal of additional dolphin monitoring and/or any
other mitigation measures when necessary;
4.
Implement
the agreed additional dolphin monitoring and/or any other mitigation
measures.
|
Notes:
ET – Environmental
Team
IEC – Independent
Environmental Checker
SO – Supervising
Officer
* Action to be
instigated within 1 month of an event
11.1.1
The EIA report identified and assessed the
potential impacts related to fisheries and
marine culture.
11.1.2
The water quality monitoring and audit
requirements are included in Section 9 Water Quality.
11.1.3
As mentioned in the EIA report, no further
monitoring and audit for fisheries are required.
12.1.1
Mitigation measures are not required for built
heritage and terrestrial archaeology. As
a precautionary measures however, periodic monitoring of construction works
should be conducted to ensure the avoidance of any impacts on Sha Lo Wan (West)
Archaeological Site. Access to Sha Lo
Wan (West) Archaeological site for works areas and storage of construction
equipment is not allowed.
13.1.1
The EIA report identified that the risks lie
well within the acceptable criteria of Annex 4 of the Technical Memorandum and
no additional mitigation members are considered necessary or justified. No monitoring and audit is therefore
required.
14.1.1
The EIA has recommended landscape and visual
mitigation measures (refer to Section 14 of EIA Report) to be undertaken during
both the construction and operation phases of the project. This section outlines the monitoring and audit
of these measures.
14.2.1
The design, implementation and maintenance of
landscape mitigation measures should be checked to ensure that any potential
conflicts between the proposed landscape measures and any other works of the
project would be resolved as early as practical without affecting the
implementation of the mitigation measures.
Table 14.1 Monitoring Programme
|
Stage
|
Monitoring Task
|
Monitoring Report
|
Form of Approval
|
Frequency
|
|
Detailed Design
|
Checking of design works against the recommendations of the landscape
and visual impact assessments within the EIA should be undertaken during
detailed design phase, to ensure that they fulfil the intention of the
mitigation measures. Any changes to the design, including design
changes on site should also be checked.
|
Not Required
|
Not Required
|
At the end of the Detailed Design Phase
|
|
Construction
|
Checking of the contractor’s operations during the construction
period.
|
Report on Contractor's compliance, by ET*
|
Counter-signature of report by IEC
|
Bi-weekly
|
|
Establishment Period
|
Checking of the plaint works during the 12-month Establishment Period
after completion of the construction works.
|
Report on Contractor’s compliance, by ET
|
Counter-signature of report by IEC
|
Every 2 months
|
|
Long Term Management (10 year)
|
Monitoring of the long-term management of the planting works in the
period up to 10 years after completion of construction works.
|
Report on compliance by ER or Maintenance Agency as appropriate
|
Counter-signature of report by Management Agency
|
Annually
|
Notes:
Environmental Team (ET) – employed by the Contractor;
Environmental Permit (EP).
14.2.2
The mitigation measures, which are proposed in
the EIA to mitigate the landscape and visual impacts, should be embodied into
the detailed engineering design, landscape design drawings and contract
documents. The Detailed Design should be
checked to ensure that the measures are fully incorporated. Potential conflicts with civil engineering,
geotechnical, structural, lighting, signage, drainage and underground utilities
should resolved as early as practical.
14.2.3
The following mitigation measures are proposed to
avoid and reduce the identified impacts.
l
Minimize
the footprint of project and that the quantity of landscape character units and
landscape resources affected;
l
Minimize
temporary works areas for construction works;
l
Undertaking
good site practices by applying hydroseeding on temporary stockpiles and
reclamation areas;
l
Conservation
of topsoil for reuse;
l
Waste
limitation by recycling of felled trees into woodchip mulch for use in
landscaped areas.
14.2.4
The following design measures will be developed
during detailed design stage to remedy and compensate unavoidable impacts:
l
Roadside
planting and planting along the edge of the reclamation is proposed;
l
Transplanting
of mature trees in good health and amenity value where appropriate and
reinstatement of areas disturbed during construction by compensatory
hydro-seeding and planting;
l
Protection
measures for the trees to be retained during construction activities;
l
Optimizing
the sizes and spacing of the bridge columns;
l
Fine-tuning
the location of the bridge columns to avoid visually-sensitive locations;
l
Aesthetic
design of the bridge form and its structural elements for HKLR, e.g. parapet,
soffit, columns, lightings and so on;
l
Considering
the decorative urban design elements for HKLR, e.g. decorative road lightings;
l
Maximizing
new tree, shrub and other vegetation planting to compensate tree felled and
vegetation removed;
l
Providing
planting area around peripheral of HKLR for tree planting screening effect;
l
Providing
salt-tolerant native trees along the planter strip at affected seawall and
newly reclaimed coastline.
l
Not
used as the aesthetic architectural design on the related buildings is related
to the HKBCF contract.
l
Not
used as the construction works of the Contract will not disturb the vegetation
in the HKBCF.
l
For
HKLR, providing aesthetic design on the viaduct, tunnel portals, at-grade roads
and reclamation (e.g. subtle colour tone and slim form for viaduct to minimize
the bulkiness of the structure and to blend the viaduct better with the
background environment, featured form of tunnel portals, roadside planting
along at-grade roads and landscape berm on & planting along edge of
reclamation area) to beautify the HKLR alignment (refer to Figure 14.4.3 of the
EIA Report).
14.2.5
The following mitigation measures
should be monitored during construction and operation phases:
Table 14.2 Mitigation Measures to be
Monitored during Construction and Operation Phases
|
Stage
|
Description of Mitigation Measures
|
|
During Construction Phase
|
Mitigate both Landscape and Visual Impacts
G1. Grass-hydroseed bare soil surface and stock pile areas.
G2. Add planting strip and automatic irrigation
system if appropriate at some portions of bridge or footbridge to screen bridge
and traffic.
G3. For HKLR, providing aesthetic design on the viaduct, tunnel
portals, at-grade roads and reclamation (e.g. subtle colour tone and slim
form for viaduct, featured form of tunnel portals, roadside planting along
at-grade roads and landscape berm on & planting along edge of reclamation
area) to beautify the HKLR alignment.
G4. Not used as this is for HKBCF
G5. Vegetation reinstatement and upgrading to disturbed areas.
G6. Maximize new tree, shrub and other vegetation planting to
compensate tree felled and vegetation removed.
G7. Provide planting area around peripheral of and within HKLR for
tree screening buffer effect.
G8. Plant salt tolerant native tree and shrubs etc along the planter
strip at affected seawall.
G9. Reserve of loose natural granite rocks for re-use. Provide
new coastline to adopt “natural-look” by means of using armour rocks in the
form of natural rock materials and planting strip area accommodating screen
buffer to enhance “natural-look” of the new coastline (see Figure 14.4.2 of
the EIA Report for example).
|
|
Mitigate Visual Impacts
V1.Minimize time for construction activities during construction
period.
V2.Provide screen hoarding at the portion of the project site / works areas
/ storage areas near VSRs who have close low-level views to the Project
during HKLR construction.
|
|
During Operation Phase
|
Mitigate both Landscape and Visual Impacts
G10. Provide proper
planting maintenance on the new planting areas to enhance the aesthetic
degree.
V3. Lighting design to minimize glare at night. Decorative road lighting to be considered
during detailed design stage
|
Note:
Figure 14.4.2 –
Details of mitigation measure – G9 for the new coastline.
14.2.6
An implementation programme will be prepared as
required by TM-EIAO. Reference will be
made to the ETWB TC(W) No. 2/2004 on Maintenance of Vegetation and Hard
Landscape Features which defines the management and maintenance responsibilities
for natural vegetation and landscape works, including both softworks and
hardworks, and the authorities for tree preservation and felling. The
format of the preliminary arrangement of implementation programme is listed in Table
14.3.
Table 14.3 Proposed Format for
Preliminary Funding, Implementation, Management and Maintenance Proposal
|
Mitigation items
|
Funding &
Implementation unit
(See Remark)
|
Maintenance unit
(See Remark)
|
|
During Construction
|
|
V1 and V2
|
Project Proponent
(i.e. HyD)
|
The Contractor
|
|
G3
|
Project Proponent /
Initiating Department (e.g. the relevant User Department of the building)
|
Project Proponent /
Initiating Department (e.g. the relevant User Department of the building)
|
|
G1, G2, G3, G6, G7, G8 and G9
|
Project Proponent
(i.e. HyD)
|
HyD / LCSD
|
|
During Operation
|
|
V3
|
Project Proponent
(i.e. HyD)
|
HyD
|
|
G10
|
Project Proponent
(i.e. HyD)
|
HyD / LCSD
|
Note:
The proposed
mitigation measures and arrangements are tentative. The responsible parties are
also tentative and subject to further agreements amongst the Government
Departments.
Construction Phase & Establishment
Period
14.2.7
The implementation of landscape construction
works and subsequent maintenance operations during the 12-month Establishment
Period must be supervised by qualified Landscape Resident Site Staff
(Registered Landscape Architect or Professional Member of the Hong Kong
Institute of Landscape Architects).